Merge branch 'patman' of git://git.denx.de/u-boot-x86

21 files changed, 3829 insertions, 121 deletions

diff --git a/tools/buildman/.gitignore b/tools/buildman/.gitignore
new file mode 100644
index 0000000..0d20b64
--- /dev/null
+++ b/tools/buildman/.gitignore
@@ -0,0 +1 @@
+*.pyc
diff --git a/tools/buildman/README b/tools/buildman/README
new file mode 100644
index 0000000..7221007
--- /dev/null
+++ b/tools/buildman/README
@@ -0,0 +1,679 @@
+# Copyright (c) 2013 The Chromium OS Authors.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+What is this?
+=============
+
+This tool handles building U-Boot to check that you have not broken it
+with your patch series. It can build each individual commit and report
+which boards fail on which commits, and which errors come up. It aims
+to make full use of multi-processor machines.
+
+A key feature of buildman is its output summary, which allows warnings,
+errors or image size increases in a particular commit or board to be
+quickly identified and the offending commit pinpointed. This can be a big
+help for anyone working with >10 patches at a time.
+
+
+Caveats
+=======
+
+Buildman is still in its infancy. It is already a very useful tool, but
+expect to find problems and send patches.
+
+Buildman can be stopped and restarted, in which case it will continue
+where it left off. This should happen cleanly and without side-effects.
+If not, it is a bug, for which a patch would be welcome.
+
+Buildman gets so tied up in its work that it can ignore the outside world.
+You may need to press Ctrl-C several times to quit it. Also it will print
+out various exceptions when stopped.
+
+
+Theory of Operation
+===================
+
+(please read this section in full twice or you will be perpetually confused)
+
+Buildman is a builder. It is not make, although it runs make. It does not
+produce any useful output on the terminal while building, except for
+progress information. All the output (errors, warnings and binaries if you
+are ask for them) is stored in output directories, which you can look at
+while the build is progressing, or when it is finished.
+
+Buildman produces a concise summary of which boards succeeded and failed.
+It shows which commit introduced which board failure using a simple
+red/green colour coding. Full error information can be requested, in which
+case it is de-duped and displayed against the commit that introduced the
+error. An example workflow is below.
+
+Buildman stores image size information and can report changes in image size
+from commit to commit. An example of this is below.
+
+Buildman starts multiple threads, and each thread builds for one board at
+a time. A thread starts at the first commit, configures the source for your
+board and builds it. Then it checks out the next commit and does an
+incremental build. Eventually the thread reaches the last commit and stops.
+If errors or warnings are found along the way, the thread will reconfigure
+after every commit, and your build will be very slow. This is because a
+file that produces just a warning would not normally be rebuilt in an
+incremental build.
+
+Buildman works in an entirely separate place from your U-Boot repository.
+It creates a separate working directory for each thread, and puts the
+output files in the working directory, organised by commit name and board
+name, in a two-level hierarchy.
+
+Buildman is invoked in your U-Boot directory, the one with the .git
+directory. It clones this repository into a copy for each thread, and the
+threads do not affect the state of your git repository. Any checkouts done
+by the thread affect only the working directory for that thread.
+
+Buildman automatically selects the correct toolchain for each board. You
+must supply suitable toolchains, but buildman takes care of selecting the
+right one.
+
+Buildman always builds a branch, and always builds the upstream commit as
+well, for comparison. It cannot build individual commits at present, unless
+(maybe) you point it at an empty branch. Put all your commits in a branch,
+set the branch's upstream to a valid value, and all will be well. Otherwise
+buildman will perform random actions. Use -n to check what the random
+actions might be.
+
+Buildman is optimised for building many commits at once, for many boards.
+On multi-core machines, Buildman is fast because it uses most of the
+available CPU power. When it gets to the end, or if you are building just
+a few commits or boards, it will be pretty slow. As a tip, if you don't
+plan to use your machine for anything else, you can use -T to increase the
+number of threads beyond the default.
+
+Buildman lets you build all boards, or a subset. Specify the subset using
+the board name, architecture name, SOC name, or anything else in the
+boards.cfg file. So 'at91' will build all AT91 boards (arm), powerpc will
+build all PowerPC boards.
+
+Buildman does not store intermediate object files. It optionally copies
+the binary output into a directory when a build is successful. Size
+information is always recorded. It needs a fair bit of disk space to work,
+typically 250MB per thread.
+
+
+Setting up
+==========
+
+1. Get the U-Boot source. You probably already have it, but if not these
+steps should get you started with a repo and some commits for testing.
+
+$ cd /path/to/u-boot
+$ git clone git://git.denx.de/u-boot.git .
+$ git checkout -b my-branch origin/master
+$ # Add some commits to the branch, reading for testing
+
+2. Create ~/.buildman to tell buildman where to find tool chains. As an
+example:
+
+# Buildman settings file
+
+[toolchain]
+root: /
+rest: /toolchains/*
+eldk: /opt/eldk-4.2
+
+[toolchain-alias]
+x86: i386
+blackfin: bfin
+sh: sh4
+nds32: nds32le
+openrisc: or32
+
+
+This selects the available toolchain paths. Add the base directory for
+each of your toolchains here. Buildman will search inside these directories
+and also in any '/usr' and '/usr/bin' subdirectories.
+
+Make sure the tags (here root: rest: and eldk:) are unique.
+
+The toolchain-alias section indicates that the i386 toolchain should be used
+to build x86 commits.
+
+
+2. Check the available toolchains
+
+Run this check to make sure that you have a toolchain for every architecture.
+
+$ ./tools/buildman/buildman --list-tool-chains
+Scanning for tool chains
+   - scanning path '/'
+      - looking in '/.'
+      - looking in '/bin'
+      - looking in '/usr/bin'
+         - found '/usr/bin/gcc'
+Tool chain test:  OK
+         - found '/usr/bin/c89-gcc'
+Tool chain test:  OK
+         - found '/usr/bin/c99-gcc'
+Tool chain test:  OK
+         - found '/usr/bin/x86_64-linux-gnu-gcc'
+Tool chain test:  OK
+   - scanning path '/toolchains/powerpc-linux'
+      - looking in '/toolchains/powerpc-linux/.'
+      - looking in '/toolchains/powerpc-linux/bin'
+         - found '/toolchains/powerpc-linux/bin/powerpc-linux-gcc'
+Tool chain test:  OK
+      - looking in '/toolchains/powerpc-linux/usr/bin'
+   - scanning path '/toolchains/nds32le-linux-glibc-v1f'
+      - looking in '/toolchains/nds32le-linux-glibc-v1f/.'
+      - looking in '/toolchains/nds32le-linux-glibc-v1f/bin'
+         - found '/toolchains/nds32le-linux-glibc-v1f/bin/nds32le-linux-gcc'
+Tool chain test:  OK
+      - looking in '/toolchains/nds32le-linux-glibc-v1f/usr/bin'
+   - scanning path '/toolchains/nios2'
+      - looking in '/toolchains/nios2/.'
+      - looking in '/toolchains/nios2/bin'
+         - found '/toolchains/nios2/bin/nios2-linux-gcc'
+Tool chain test:  OK
+         - found '/toolchains/nios2/bin/nios2-linux-uclibc-gcc'
+Tool chain test:  OK
+      - looking in '/toolchains/nios2/usr/bin'
+         - found '/toolchains/nios2/usr/bin/nios2-linux-gcc'
+Tool chain test:  OK
+         - found '/toolchains/nios2/usr/bin/nios2-linux-uclibc-gcc'
+Tool chain test:  OK
+   - scanning path '/toolchains/microblaze-unknown-linux-gnu'
+      - looking in '/toolchains/microblaze-unknown-linux-gnu/.'
+      - looking in '/toolchains/microblaze-unknown-linux-gnu/bin'
+         - found '/toolchains/microblaze-unknown-linux-gnu/bin/microblaze-unknown-linux-gnu-gcc'
+Tool chain test:  OK
+         - found '/toolchains/microblaze-unknown-linux-gnu/bin/mb-linux-gcc'
+Tool chain test:  OK
+      - looking in '/toolchains/microblaze-unknown-linux-gnu/usr/bin'
+   - scanning path '/toolchains/mips-linux'
+      - looking in '/toolchains/mips-linux/.'
+      - looking in '/toolchains/mips-linux/bin'
+         - found '/toolchains/mips-linux/bin/mips-linux-gcc'
+Tool chain test:  OK
+      - looking in '/toolchains/mips-linux/usr/bin'
+   - scanning path '/toolchains/old'
+      - looking in '/toolchains/old/.'
+      - looking in '/toolchains/old/bin'
+      - looking in '/toolchains/old/usr/bin'
+   - scanning path '/toolchains/i386-linux'
+      - looking in '/toolchains/i386-linux/.'
+      - looking in '/toolchains/i386-linux/bin'
+         - found '/toolchains/i386-linux/bin/i386-linux-gcc'
+Tool chain test:  OK
+      - looking in '/toolchains/i386-linux/usr/bin'
+   - scanning path '/toolchains/bfin-uclinux'
+      - looking in '/toolchains/bfin-uclinux/.'
+      - looking in '/toolchains/bfin-uclinux/bin'
+         - found '/toolchains/bfin-uclinux/bin/bfin-uclinux-gcc'
+Tool chain test:  OK
+      - looking in '/toolchains/bfin-uclinux/usr/bin'
+   - scanning path '/toolchains/sparc-elf'
+      - looking in '/toolchains/sparc-elf/.'
+      - looking in '/toolchains/sparc-elf/bin'
+         - found '/toolchains/sparc-elf/bin/sparc-elf-gcc'
+Tool chain test:  OK
+      - looking in '/toolchains/sparc-elf/usr/bin'
+   - scanning path '/toolchains/arm-2010q1'
+      - looking in '/toolchains/arm-2010q1/.'
+      - looking in '/toolchains/arm-2010q1/bin'
+         - found '/toolchains/arm-2010q1/bin/arm-none-linux-gnueabi-gcc'
+Tool chain test:  OK
+      - looking in '/toolchains/arm-2010q1/usr/bin'
+   - scanning path '/toolchains/from'
+      - looking in '/toolchains/from/.'
+      - looking in '/toolchains/from/bin'
+      - looking in '/toolchains/from/usr/bin'
+   - scanning path '/toolchains/sh4-gentoo-linux-gnu'
+      - looking in '/toolchains/sh4-gentoo-linux-gnu/.'
+      - looking in '/toolchains/sh4-gentoo-linux-gnu/bin'
+         - found '/toolchains/sh4-gentoo-linux-gnu/bin/sh4-gentoo-linux-gnu-gcc'
+Tool chain test:  OK
+      - looking in '/toolchains/sh4-gentoo-linux-gnu/usr/bin'
+   - scanning path '/toolchains/avr32-linux'
+      - looking in '/toolchains/avr32-linux/.'
+      - looking in '/toolchains/avr32-linux/bin'
+         - found '/toolchains/avr32-linux/bin/avr32-gcc'
+Tool chain test:  OK
+      - looking in '/toolchains/avr32-linux/usr/bin'
+   - scanning path '/toolchains/m68k-linux'
+      - looking in '/toolchains/m68k-linux/.'
+      - looking in '/toolchains/m68k-linux/bin'
+         - found '/toolchains/m68k-linux/bin/m68k-linux-gcc'
+Tool chain test:  OK
+      - looking in '/toolchains/m68k-linux/usr/bin'
+List of available toolchains (17):
+arm       : /toolchains/arm-2010q1/bin/arm-none-linux-gnueabi-gcc
+avr32     : /toolchains/avr32-linux/bin/avr32-gcc
+bfin      : /toolchains/bfin-uclinux/bin/bfin-uclinux-gcc
+c89       : /usr/bin/c89-gcc
+c99       : /usr/bin/c99-gcc
+i386      : /toolchains/i386-linux/bin/i386-linux-gcc
+m68k      : /toolchains/m68k-linux/bin/m68k-linux-gcc
+mb        : /toolchains/microblaze-unknown-linux-gnu/bin/mb-linux-gcc
+microblaze: /toolchains/microblaze-unknown-linux-gnu/bin/microblaze-unknown-linux-gnu-gcc
+mips      : /toolchains/mips-linux/bin/mips-linux-gcc
+nds32le   : /toolchains/nds32le-linux-glibc-v1f/bin/nds32le-linux-gcc
+nios2     : /toolchains/nios2/bin/nios2-linux-gcc
+powerpc   : /toolchains/powerpc-linux/bin/powerpc-linux-gcc
+sandbox   : /usr/bin/gcc
+sh4       : /toolchains/sh4-gentoo-linux-gnu/bin/sh4-gentoo-linux-gnu-gcc
+sparc     : /toolchains/sparc-elf/bin/sparc-elf-gcc
+x86_64    : /usr/bin/x86_64-linux-gnu-gcc
+
+
+You can see that everything is covered, even some strange ones that won't
+be used (c88 and c99). This is a feature.
+
+
+How to run it
+=============
+
+First do a dry run using the -n flag: (replace <branch> with a real, local
+branch with a valid upstream)
+
+$ ./tools/buildman/buildman -b <branch> -n
+
+If it can't detect the upstream branch, try checking out the branch, and
+doing something like 'git branch --set-upstream <branch> upstream/master'
+or something similar.
+
+As an exmmple:
+
+Dry run, so not doing much. But I would do this:
+
+Building 18 commits for 1059 boards (4 threads, 1 job per thread)
+Build directory: ../lcd9b
+    5bb3505 Merge branch 'master' of git://git.denx.de/u-boot-arm
+    c18f1b4 tegra: Use const for pinmux_config_pingroup/table()
+    2f043ae tegra: Add display support to funcmux
+    e349900 tegra: fdt: Add pwm binding and node
+    424a5f0 tegra: fdt: Add LCD definitions for Tegra
+    0636ccf tegra: Add support for PWM
+    a994fe7 tegra: Add SOC support for display/lcd
+    fcd7350 tegra: Add LCD driver
+    4d46e9d tegra: Add LCD support to Nvidia boards
+    991bd48 arm: Add control over cachability of memory regions
+    54e8019 lcd: Add CONFIG_LCD_ALIGNMENT to select frame buffer alignment
+    d92aff7 lcd: Add support for flushing LCD fb from dcache after update
+    dbd0677 tegra: Align LCD frame buffer to section boundary
+    0cff9b8 tegra: Support control of cache settings for LCD
+    9c56900 tegra: fdt: Add LCD definitions for Seaboard
+    5cc29db lcd: Add CONFIG_CONSOLE_SCROLL_LINES option to speed console
+    cac5a23 tegra: Enable display/lcd support on Seaboard
+    49ff541 wip
+
+Total boards to build for each commit: 1059
+
+This shows that it will build all 1059 boards, using 4 threads (because
+we have a 4-core CPU). Each thread will run with -j1, meaning that each
+make job will use a single CPU. The list of commits to be built helps you
+confirm that things look about right. Notice that buildman has chosen a
+'base' directory for you, immediately above your source tree.
+
+Buildman works entirely inside the base directory, here ../lcd9b,
+creating a working directory for each thread, and creating output
+directories for each commit and board.
+
+
+Suggested Workflow
+==================
+
+To run the build for real, take off the -n:
+
+$ ./tools/buildman/buildman -b <branch>
+
+Buildman will set up some working directories, and get started. After a
+minute or so it will settle down to a steady pace, with a display like this:
+
+Building 18 commits for 1059 boards (4 threads, 1 job per thread)
+  528   36  124 /19062  1:13:30  : SIMPC8313_SP
+
+This means that it is building 19062 board/commit combinations. So far it
+has managed to succesfully build 528. Another 36 have built with warnings,
+and 124 more didn't build at all. Buildman expects to complete the process
+in an hour and 15 minutes. Use this time to buy a faster computer.
+
+
+To find out how the build went, ask for a summary with -s. You can do this
+either before the build completes (presumably in another terminal) or or
+afterwards. Let's work through an example of how this is used:
+
+$ ./tools/buildman/buildman -b lcd9b -s
+...
+01: Merge branch 'master' of git://git.denx.de/u-boot-arm
+   powerpc:   + galaxy5200_LOWBOOT
+02: tegra: Use const for pinmux_config_pingroup/table()
+03: tegra: Add display support to funcmux
+04: tegra: fdt: Add pwm binding and node
+05: tegra: fdt: Add LCD definitions for Tegra
+06: tegra: Add support for PWM
+07: tegra: Add SOC support for display/lcd
+08: tegra: Add LCD driver
+09: tegra: Add LCD support to Nvidia boards
+10: arm: Add control over cachability of memory regions
+11: lcd: Add CONFIG_LCD_ALIGNMENT to select frame buffer alignment
+12: lcd: Add support for flushing LCD fb from dcache after update
+       arm:   + lubbock
+13: tegra: Align LCD frame buffer to section boundary
+14: tegra: Support control of cache settings for LCD
+15: tegra: fdt: Add LCD definitions for Seaboard
+16: lcd: Add CONFIG_CONSOLE_SCROLL_LINES option to speed console
+17: tegra: Enable display/lcd support on Seaboard
+18: wip
+
+This shows which commits have succeeded and which have failed. In this case
+the build is still in progress so many boards are not built yet (use -u to
+see which ones). But still we can see a few failures. The galaxy5200_LOWBOOT
+never builds correctly. This could be a problem with our toolchain, or it
+could be a bug in the upstream. The good news is that we probably don't need
+to blame our commits. The bad news is it isn't tested on that board.
+
+Commit 12 broke lubbock. That's what the '+ lubbock' means. The failure
+is never fixed by a later commit, or you would see lubbock again, in green,
+without the +.
+
+To see the actual error:
+
+$ ./tools/buildman/buildman -b <branch> -se lubbock
+...
+12: lcd: Add support for flushing LCD fb from dcache after update
+       arm:   + lubbock
++common/libcommon.o: In function `lcd_sync':
++/u-boot/lcd9b/.bm-work/00/common/lcd.c:120: undefined reference to `flush_dcache_range'
++arm-none-linux-gnueabi-ld: BFD (Sourcery G++ Lite 2010q1-202) 2.19.51.20090709 assertion fail /scratch/julian/2010q1-release-linux-lite/obj/binutils-src-2010q1-202-arm-none-linux-gnueabi-i686-pc-linux-gnu/bfd/elf32-arm.c:12572
++make: *** [/u-boot/lcd9b/.bm-work/00/build/u-boot] Error 139
+13: tegra: Align LCD frame buffer to section boundary
+14: tegra: Support control of cache settings for LCD
+15: tegra: fdt: Add LCD definitions for Seaboard
+16: lcd: Add CONFIG_CONSOLE_SCROLL_LINES option to speed console
+-/u-boot/lcd9b/.bm-work/00/common/lcd.c:120: undefined reference to `flush_dcache_range'
++/u-boot/lcd9b/.bm-work/00/common/lcd.c:125: undefined reference to `flush_dcache_range'
+17: tegra: Enable display/lcd support on Seaboard
+18: wip
+
+So the problem is in lcd.c, due to missing cache operations. This information
+should be enough to work out what that commit is doing to break these
+boards. (In this case pxa did not have cache operations defined).
+
+If you see error lines marked with - that means that the errors were fixed
+by that commit. Sometimes commits can be in the wrong order, so that a
+breakage is introduced for a few commits and fixed by later commits. This
+shows up clearly with buildman. You can then reorder the commits and try
+again.
+
+At commit 16, the error moves - you can see that the old error at line 120
+is fixed, but there is a new one at line 126. This is probably only because
+we added some code and moved the broken line futher down the file.
+
+If many boards have the same error, then -e will display the error only
+once. This makes the output as concise as possible.
+
+The full build output in this case is available in:
+
+../lcd9b/12_of_18_gd92aff7_lcd--Add-support-for/lubbock/
+
+   done: Indicates the build was done, and holds the return code from make.
+         This is 0 for a good build, typically 2 for a failure.
+
+   err:  Output from stderr, if any. Errors and warnings appear here.
+
+   log:  Output from stdout. Normally there isn't any since buildman runs
+         in silent mode for now.
+
+   toolchain: Shows information about the toolchain used for the build.
+
+   sizes: Shows image size information.
+
+It is possible to get the build output there also. Use the -k option for
+this. In that case you will also see some output files, like:
+
+   System.map  toolchain  u-boot  u-boot.bin  u-boot.map  autoconf.mk
+   (also SPL versions u-boot-spl and u-boot-spl.bin if available)
+
+
+Checking Image Sizes
+====================
+
+A key requirement for U-Boot is that you keep code/data size to a minimum.
+Where a new feature increases this noticeably it should normally be put
+behind a CONFIG flag so that boards can leave it off and keep the image
+size more or less the same with each new release.
+
+To check the impact of your commits on image size, use -S. For example:
+
+$ ./tools/buildman/buildman -b us-x86 -sS
+Summary of 10 commits for 1066 boards (4 threads, 1 job per thread)
+01: MAKEALL: add support for per architecture toolchains
+02: x86: Add function to get top of usable ram
+       x86: (for 1/3 boards)  text -272.0  rodata +41.0
+03: x86: Add basic cache operations
+04: x86: Permit bootstage and timer data to be used prior to relocation
+       x86: (for 1/3 boards)  data +16.0
+05: x86: Add an __end symbol to signal the end of the U-Boot binary
+       x86: (for 1/3 boards)  text +76.0
+06: x86: Rearrange the output input to remove BSS
+       x86: (for 1/3 boards)  bss -2140.0
+07: x86: Support relocation of FDT on start-up
+       x86: +   coreboot-x86
+08: x86: Add error checking to x86 relocation code
+09: x86: Adjust link device tree include file
+10: x86: Enable CONFIG_OF_CONTROL on coreboot
+
+
+You can see that image size only changed on x86, which is good because this
+series is not supposed to change any other board. From commit 7 onwards the
+build fails so we don't get code size numbers. The numbers are fractional
+because they are an average of all boards for that architecture. The
+intention is to allow you to quickly find image size problems introduced by
+your commits.
+
+Note that the 'text' region and 'rodata' are split out. You should add the
+two together to get the total read-only size (reported as the first column
+in the output from binutil's 'size' utility).
+
+A useful option is --step which lets you skip some commits. For example
+--step 2 will show the image sizes for only every 2nd commit (so it will
+compare the image sizes of the 1st, 3rd, 5th... commits). You can also use
+--step 0 which will compare only the first and last commits. This is useful
+for an overview of how your entire series affects code size.
+
+You can also use -d to see a detailed size breakdown for each board. This
+list is sorted in order from largest growth to largest reduction.
+
+It is possible to go a little further with the -B option (--bloat). This
+shows where U-Boot has bloted, breaking the size change down to the function
+level. Example output is below:
+
+$ ./tools/buildman/buildman -b us-mem4 -sSdB
+...
+19: Roll crc32 into hash infrastructure
+       arm: (for 10/10 boards)  all -143.4  bss +1.2  data -4.8  rodata -48.2 text -91.6
+            paz00          :  all +23  bss -4  rodata -29  text +56
+               u-boot: add: 1/0, grow: 3/-2 bytes: 168/-104 (64)
+                 function                                   old     new   delta
+                 hash_command                                80     160     +80
+                 crc32_wd_buf                                 -      56     +56
+                 ext4fs_read_file                           540     568     +28
+                 insert_var_value_sub                       688     692      +4
+                 run_list_real                             1996    1992      -4
+                 do_mem_crc                                 168      68    -100
+            trimslice      :  all -9  bss +16  rodata -29  text +4
+               u-boot: add: 1/0, grow: 1/-3 bytes: 136/-124 (12)
+                 function                                   old     new   delta
+                 hash_command                                80     160     +80
+                 crc32_wd_buf                                 -      56     +56
+                 ext4fs_iterate_dir                         672     668      -4
+                 ext4fs_read_file                           568     548     -20
+                 do_mem_crc                                 168      68    -100
+            whistler       :  all -9  bss +16  rodata -29  text +4
+               u-boot: add: 1/0, grow: 1/-3 bytes: 136/-124 (12)
+                 function                                   old     new   delta
+                 hash_command                                80     160     +80
+                 crc32_wd_buf                                 -      56     +56
+                 ext4fs_iterate_dir                         672     668      -4
+                 ext4fs_read_file                           568     548     -20
+                 do_mem_crc                                 168      68    -100
+            seaboard       :  all -9  bss -28  rodata -29  text +48
+               u-boot: add: 1/0, grow: 3/-2 bytes: 160/-104 (56)
+                 function                                   old     new   delta
+                 hash_command                                80     160     +80
+                 crc32_wd_buf                                 -      56     +56
+                 ext4fs_read_file                           548     568     +20
+                 run_list_real                             1996    2000      +4
+                 do_nandboot                                760     756      -4
+                 do_mem_crc                                 168      68    -100
+            colibri_t20_iris:  all -9  rodata -29  text +20
+               u-boot: add: 1/0, grow: 2/-3 bytes: 140/-112 (28)
+                 function                                   old     new   delta
+                 hash_command                                80     160     +80
+                 crc32_wd_buf                                 -      56     +56
+                 read_abs_bbt                               204     208      +4
+                 do_nandboot                                760     756      -4
+                 ext4fs_read_file                           576     568      -8
+                 do_mem_crc                                 168      68    -100
+            ventana        :  all -37  bss -12  rodata -29  text +4
+               u-boot: add: 1/0, grow: 1/-3 bytes: 136/-124 (12)
+                 function                                   old     new   delta
+                 hash_command                                80     160     +80
+                 crc32_wd_buf                                 -      56     +56
+                 ext4fs_iterate_dir                         672     668      -4
+                 ext4fs_read_file                           568     548     -20
+                 do_mem_crc                                 168      68    -100
+            harmony        :  all -37  bss -16  rodata -29  text +8
+               u-boot: add: 1/0, grow: 2/-3 bytes: 140/-124 (16)
+                 function                                   old     new   delta
+                 hash_command                                80     160     +80
+                 crc32_wd_buf                                 -      56     +56
+                 nand_write_oob_syndrome                    428     432      +4
+                 ext4fs_iterate_dir                         672     668      -4
+                 ext4fs_read_file                           568     548     -20
+                 do_mem_crc                                 168      68    -100
+            medcom-wide    :  all -417  bss +28  data -16  rodata -93  text -336
+               u-boot: add: 1/-1, grow: 1/-2 bytes: 88/-376 (-288)
+                 function                                   old     new   delta
+                 crc32_wd_buf                                 -      56     +56
+                 do_fat_read_at                            2872    2904     +32
+                 hash_algo                                   16       -     -16
+                 do_mem_crc                                 168      68    -100
+                 hash_command                               420     160    -260
+            tec            :  all -449  bss -4  data -16  rodata -93  text -336
+               u-boot: add: 1/-1, grow: 1/-2 bytes: 88/-376 (-288)
+                 function                                   old     new   delta
+                 crc32_wd_buf                                 -      56     +56
+                 do_fat_read_at                            2872    2904     +32
+                 hash_algo                                   16       -     -16
+                 do_mem_crc                                 168      68    -100
+                 hash_command                               420     160    -260
+            plutux         :  all -481  bss +16  data -16  rodata -93  text -388
+               u-boot: add: 1/-1, grow: 1/-3 bytes: 68/-408 (-340)
+                 function                                   old     new   delta
+                 crc32_wd_buf                                 -      56     +56
+                 do_load_serial_bin                        1688    1700     +12
+                 hash_algo                                   16       -     -16
+                 do_fat_read_at                            2904    2872     -32
+                 do_mem_crc                                 168      68    -100
+                 hash_command                               420     160    -260
+   powerpc: (for 5/5 boards)  all +37.4  data -3.2  rodata -41.8  text +82.4
+            MPC8610HPCD    :  all +55  rodata -29  text +84
+               u-boot: add: 1/0, grow: 0/-1 bytes: 176/-96 (80)
+                 function                                   old     new   delta
+                 hash_command                                 -     176    +176
+                 do_mem_crc                                 184      88     -96
+            MPC8641HPCN    :  all +55  rodata -29  text +84
+               u-boot: add: 1/0, grow: 0/-1 bytes: 176/-96 (80)
+                 function                                   old     new   delta
+                 hash_command                                 -     176    +176
+                 do_mem_crc                                 184      88     -96
+            MPC8641HPCN_36BIT:  all +55  rodata -29  text +84
+               u-boot: add: 1/0, grow: 0/-1 bytes: 176/-96 (80)
+                 function                                   old     new   delta
+                 hash_command                                 -     176    +176
+                 do_mem_crc                                 184      88     -96
+            sbc8641d       :  all +55  rodata -29  text +84
+               u-boot: add: 1/0, grow: 0/-1 bytes: 176/-96 (80)
+                 function                                   old     new   delta
+                 hash_command                                 -     176    +176
+                 do_mem_crc                                 184      88     -96
+            xpedite517x    :  all -33  data -16  rodata -93  text +76
+               u-boot: add: 1/-1, grow: 0/-1 bytes: 176/-112 (64)
+                 function                                   old     new   delta
+                 hash_command                                 -     176    +176
+                 hash_algo                                   16       -     -16
+                 do_mem_crc                                 184      88     -96
+...
+
+
+This shows that commit 19 has increased text size for arm (although only one
+board was built) and by 96 bytes for powerpc. This increase was offset in both
+cases by reductions in rodata and data/bss.
+
+Shown below the summary lines is the sizes for each board. Below each board
+is the sizes for each function. This information starts with:
+
+   add - number of functions added / removed
+   grow - number of functions which grew / shrunk
+   bytes - number of bytes of code added to / removed from all functions,
+            plus the total byte change in brackets
+
+The change seems to be that hash_command() has increased by more than the
+do_mem_crc() function has decreased. The function sizes typically add up to
+roughly the text area size, but note that every read-only section except
+rodata is included in 'text', so the function total does not exactly
+correspond.
+
+It is common when refactoring code for the rodata to decrease as the text size
+increases, and vice versa.
+
+
+Other options
+=============
+
+Buildman has various other command line options. Try --help to see them.
+
+
+TODO
+====
+
+This has mostly be written in my spare time as a response to my difficulties
+in testing large series of patches. Apart from tidying up there is quite a
+bit of scope for improvement. Things like better error diffs, easier access
+to log files, error display while building. Also it would be nice it buildman
+could 'hunt' for problems, perhaps by building a few boards for each arch,
+or checking commits for changed files and building only boards which use
+those files.
+
+
+Credits
+=======
+
+Thanks to Grant Grundler <grundler@chromium.org> for his ideas for improving
+the build speed by building all commits for a board instead of the other
+way around.
+
+
+
+Simon Glass
+sjg@chromium.org
+Halloween 2012
+Updated 12-12-12
+Updated 23-02-13
diff --git a/tools/buildman/board.py b/tools/buildman/board.py
new file mode 100644
index 0000000..9f50aba
--- /dev/null
+++ b/tools/buildman/board.py
@@ -0,0 +1,167 @@
+# Copyright (c) 2012 The Chromium OS Authors.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+class Board:
+    """A particular board that we can build"""
+    def __init__(self, target, arch, cpu, board_name, vendor, soc, options):
+        """Create a new board type.
+
+        Args:
+            target: Target name (use make <target>_config to configure)
+            arch: Architecture name (e.g. arm)
+            cpu: Cpu name (e.g. arm1136)
+            board_name: Name of board (e.g. integrator)
+            vendor: Name of vendor (e.g. armltd)
+            soc: Name of SOC, or '' if none (e.g. mx31)
+            options: board-specific options (e.g. integratorcp:CM1136)
+        """
+        self.target = target
+        self.arch = arch
+        self.cpu = cpu
+        self.board_name = board_name
+        self.vendor = vendor
+        self.soc = soc
+        self.props = [self.target, self.arch, self.cpu, self.board_name,
+                      self.vendor, self.soc]
+        self.options = options
+        self.build_it = False
+
+
+class Boards:
+    """Manage a list of boards."""
+    def __init__(self):
+        # Use a simple list here, sinc OrderedDict requires Python 2.7
+        self._boards = []
+
+    def AddBoard(self, board):
+        """Add a new board to the list.
+
+        The board's target member must not already exist in the board list.
+
+        Args:
+            board: board to add
+        """
+        self._boards.append(board)
+
+    def ReadBoards(self, fname):
+        """Read a list of boards from a board file.
+
+        Create a board object for each and add it to our _boards list.
+
+        Args:
+            fname: Filename of boards.cfg file
+        """
+        with open(fname, 'r') as fd:
+            for line in fd:
+                if line[0] == '#':
+                    continue
+                fields = line.split()
+                if not fields:
+                    continue
+                for upto in range(len(fields)):
+                    if fields[upto] == '-':
+                        fields[upto] = ''
+                while len(fields) < 7:
+                    fields.append('')
+
+                board = Board(*fields)
+                self.AddBoard(board)
+
+
+    def GetList(self):
+        """Return a list of available boards.
+
+        Returns:
+            List of Board objects
+        """
+        return self._boards
+
+    def GetDict(self):
+        """Build a dictionary containing all the boards.
+
+        Returns:
+            Dictionary:
+                key is board.target
+                value is board
+        """
+        board_dict = {}
+        for board in self._boards:
+            board_dict[board.target] = board
+        return board_dict
+
+    def GetSelectedDict(self):
+        """Return a dictionary containing the selected boards
+
+        Returns:
+            List of Board objects that are marked selected
+        """
+        board_dict = {}
+        for board in self._boards:
+            if board.build_it:
+                board_dict[board.target] = board
+        return board_dict
+
+    def GetSelected(self):
+        """Return a list of selected boards
+
+        Returns:
+            List of Board objects that are marked selected
+        """
+        return [board for board in self._boards if board.build_it]
+
+    def GetSelectedNames(self):
+        """Return a list of selected boards
+
+        Returns:
+            List of board names that are marked selected
+        """
+        return [board.target for board in self._boards if board.build_it]
+
+    def SelectBoards(self, args):
+        """Mark boards selected based on args
+
+        Args:
+            List of strings specifying boards to include, either named, or
+            by their target, architecture, cpu, vendor or soc. If empty, all
+            boards are selected.
+
+        Returns:
+            Dictionary which holds the number of boards which were selected
+            due to each argument, arranged by argument.
+        """
+        result = {}
+        for arg in args:
+            result[arg] = 0
+        result['all'] = 0
+
+        for board in self._boards:
+            if args:
+                for arg in args:
+                    if arg in board.props:
+                        if not board.build_it:
+                            board.build_it = True
+                            result[arg] += 1
+                            result['all'] += 1
+            else:
+                board.build_it = True
+                result['all'] += 1
+
+        return result
diff --git a/tools/buildman/bsettings.py b/tools/buildman/bsettings.py
new file mode 100644
index 0000000..7e66c63
--- /dev/null
+++ b/tools/buildman/bsettings.py
@@ -0,0 +1,60 @@
+# Copyright (c) 2012 The Chromium OS Authors.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+import ConfigParser
+import os
+
+
+def Setup(fname=''):
+    """Set up the buildman settings module by reading config files
+
+    Args:
+        config_fname:   Config filename to read ('' for default)
+    """
+    global settings
+    global config_fname
+
+    settings = ConfigParser.SafeConfigParser()
+    config_fname = fname
+    if config_fname == '':
+        config_fname = '%s/.buildman' % os.getenv('HOME')
+    if config_fname:
+        settings.read(config_fname)
+
+def GetItems(section):
+    """Get the items from a section of the config.
+
+    Args:
+        section: name of section to retrieve
+
+    Returns:
+        List of (name, value) tuples for the section
+    """
+    try:
+        return settings.items(section)
+    except ConfigParser.NoSectionError as e:
+        print e
+        print ("Warning: No tool chains - please add a [toolchain] section "
+                "to your buildman config file %s. See README for details" %
+                config_fname)
+        return []
+    except:
+        raise
diff --git a/tools/buildman/builder.py b/tools/buildman/builder.py
new file mode 100644
index 0000000..e426442
--- /dev/null
+++ b/tools/buildman/builder.py
@@ -0,0 +1,1445 @@
+# Copyright (c) 2013 The Chromium OS Authors.
+#
+# Bloat-o-meter code used here Copyright 2004 Matt Mackall <mpm@selenic.com>
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+import collections
+import errno
+from datetime import datetime, timedelta
+import glob
+import os
+import re
+import Queue
+import shutil
+import string
+import sys
+import threading
+import time
+
+import command
+import gitutil
+import terminal
+import toolchain
+
+
+"""
+Theory of Operation
+
+Please see README for user documentation, and you should be familiar with
+that before trying to make sense of this.
+
+Buildman works by keeping the machine as busy as possible, building different
+commits for different boards on multiple CPUs at once.
+
+The source repo (self.git_dir) contains all the commits to be built. Each
+thread works on a single board at a time. It checks out the first commit,
+configures it for that board, then builds it. Then it checks out the next
+commit and builds it (typically without re-configuring). When it runs out
+of commits, it gets another job from the builder and starts again with that
+board.
+
+Clearly the builder threads could work either way - they could check out a
+commit and then built it for all boards. Using separate directories for each
+commit/board pair they could leave their build product around afterwards
+also.
+
+The intent behind building a single board for multiple commits, is to make
+use of incremental builds. Since each commit is built incrementally from
+the previous one, builds are faster. Reconfiguring for a different board
+removes all intermediate object files.
+
+Many threads can be working at once, but each has its own working directory.
+When a thread finishes a build, it puts the output files into a result
+directory.
+
+The base directory used by buildman is normally '../<branch>', i.e.
+a directory higher than the source repository and named after the branch
+being built.
+
+Within the base directory, we have one subdirectory for each commit. Within
+that is one subdirectory for each board. Within that is the build output for
+that commit/board combination.
+
+Buildman also create working directories for each thread, in a .bm-work/
+subdirectory in the base dir.
+
+As an example, say we are building branch 'us-net' for boards 'sandbox' and
+'seaboard', and say that us-net has two commits. We will have directories
+like this:
+
+us-net/             base directory
+    01_of_02_g4ed4ebc_net--Add-tftp-speed-/
+        sandbox/
+            u-boot.bin
+        seaboard/
+            u-boot.bin
+    02_of_02_g4ed4ebc_net--Check-tftp-comp/
+        sandbox/
+            u-boot.bin
+        seaboard/
+            u-boot.bin
+    .bm-work/
+        00/         working directory for thread 0 (contains source checkout)
+            build/  build output
+        01/         working directory for thread 1
+            build/  build output
+        ...
+u-boot/             source directory
+    .git/           repository
+"""
+
+# Possible build outcomes
+OUTCOME_OK, OUTCOME_WARNING, OUTCOME_ERROR, OUTCOME_UNKNOWN = range(4)
+
+# Translate a commit subject into a valid filename
+trans_valid_chars = string.maketrans("/: ", "---")
+
+
+def Mkdir(dirname):
+    """Make a directory if it doesn't already exist.
+
+    Args:
+        dirname: Directory to create
+    """
+    try:
+        os.mkdir(dirname)
+    except OSError as err:
+        if err.errno == errno.EEXIST:
+            pass
+        else:
+            raise
+
+class BuilderJob:
+    """Holds information about a job to be performed by a thread
+
+    Members:
+        board: Board object to build
+        commits: List of commit options to build.
+    """
+    def __init__(self):
+        self.board = None
+        self.commits = []
+
+
+class ResultThread(threading.Thread):
+    """This thread processes results from builder threads.
+
+    It simply passes the results on to the builder. There is only one
+    result thread, and this helps to serialise the build output.
+    """
+    def __init__(self, builder):
+        """Set up a new result thread
+
+        Args:
+            builder: Builder which will be sent each result
+        """
+        threading.Thread.__init__(self)
+        self.builder = builder
+
+    def run(self):
+        """Called to start up the result thread.
+
+        We collect the next result job and pass it on to the build.
+        """
+        while True:
+            result = self.builder.out_queue.get()
+            self.builder.ProcessResult(result)
+            self.builder.out_queue.task_done()
+
+
+class BuilderThread(threading.Thread):
+    """This thread builds U-Boot for a particular board.
+
+    An input queue provides each new job. We run 'make' to build U-Boot
+    and then pass the results on to the output queue.
+
+    Members:
+        builder: The builder which contains information we might need
+        thread_num: Our thread number (0-n-1), used to decide on a
+                temporary directory
+    """
+    def __init__(self, builder, thread_num):
+        """Set up a new builder thread"""
+        threading.Thread.__init__(self)
+        self.builder = builder
+        self.thread_num = thread_num
+
+    def Make(self, commit, brd, stage, cwd, *args, **kwargs):
+        """Run 'make' on a particular commit and board.
+
+        The source code will already be checked out, so the 'commit'
+        argument is only for information.
+
+        Args:
+            commit: Commit object that is being built
+            brd: Board object that is being built
+            stage: Stage of the build. Valid stages are:
+                        distclean - can be called to clean source
+                        config - called to configure for a board
+                        build - the main make invocation - it does the build
+            args: A list of arguments to pass to 'make'
+            kwargs: A list of keyword arguments to pass to command.RunPipe()
+
+        Returns:
+            CommandResult object
+        """
+        return self.builder.do_make(commit, brd, stage, cwd, *args,
+                **kwargs)
+
+    def RunCommit(self, commit_upto, brd, work_dir, do_config, force_build):
+        """Build a particular commit.
+
+        If the build is already done, and we are not forcing a build, we skip
+        the build and just return the previously-saved results.
+
+        Args:
+            commit_upto: Commit number to build (0...n-1)
+            brd: Board object to build
+            work_dir: Directory to which the source will be checked out
+            do_config: True to run a make <board>_config on the source
+            force_build: Force a build even if one was previously done
+
+        Returns:
+            tuple containing:
+                - CommandResult object containing the results of the build
+                - boolean indicating whether 'make config' is still needed
+        """
+        # Create a default result - it will be overwritte by the call to
+        # self.Make() below, in the event that we do a build.
+        result = command.CommandResult()
+        result.return_code = 0
+        out_dir = os.path.join(work_dir, 'build')
+
+        # Check if the job was already completed last time
+        done_file = self.builder.GetDoneFile(commit_upto, brd.target)
+        result.already_done = os.path.exists(done_file)
+        if result.already_done and not force_build:
+            # Get the return code from that build and use it
+            with open(done_file, 'r') as fd:
+                result.return_code = int(fd.readline())
+            err_file = self.builder.GetErrFile(commit_upto, brd.target)
+            if os.path.exists(err_file) and os.stat(err_file).st_size:
+                result.stderr = 'bad'
+        else:
+            # We are going to have to build it. First, get a toolchain
+            if not self.toolchain:
+                try:
+                    self.toolchain = self.builder.toolchains.Select(brd.arch)
+                except ValueError as err:
+                    result.return_code = 10
+                    result.stdout = ''
+                    result.stderr = str(err)
+                    # TODO(sjg@chromium.org): This gets swallowed, but needs
+                    # to be reported.
+
+            if self.toolchain:
+                # Checkout the right commit
+                if commit_upto is not None:
+                    commit = self.builder.commits[commit_upto]
+                    if self.builder.checkout:
+                        git_dir = os.path.join(work_dir, '.git')
+                        gitutil.Checkout(commit.hash, git_dir, work_dir,
+                                         force=True)
+                else:
+                    commit = self.builder.commit # Ick, fix this for BuildCommits()
+
+                # Set up the environment and command line
+                env = self.toolchain.MakeEnvironment()
+                Mkdir(out_dir)
+                args = ['O=build', '-s']
+                if self.builder.num_jobs is not None:
+                    args.extend(['-j', str(self.builder.num_jobs)])
+                config_args = ['%s_config' % brd.target]
+                config_out = ''
+
+                # If we need to reconfigure, do that now
+                if do_config:
+                    result = self.Make(commit, brd, 'distclean', work_dir,
+                            'distclean', *args, env=env)
+                    result = self.Make(commit, brd, 'config', work_dir,
+                            *(args + config_args), env=env)
+                    config_out = result.combined
+                    do_config = False   # No need to configure next time
+                if result.return_code == 0:
+                    result = self.Make(commit, brd, 'build', work_dir, *args,
+                            env=env)
+                    result.stdout = config_out + result.stdout
+            else:
+                result.return_code = 1
+                result.stderr = 'No tool chain for %s\n' % brd.arch
+            result.already_done = False
+
+        result.toolchain = self.toolchain
+        result.brd = brd
+        result.commit_upto = commit_upto
+        result.out_dir = out_dir
+        return result, do_config
+
+    def _WriteResult(self, result, keep_outputs):
+        """Write a built result to the output directory.
+
+        Args:
+            result: CommandResult object containing result to write
+            keep_outputs: True to store the output binaries, False
+                to delete them
+        """
+        # Fatal error
+        if result.return_code < 0:
+            return
+
+        # Aborted?
+        if result.stderr and 'No child processes' in result.stderr:
+            return
+
+        if result.already_done:
+            return
+
+        # Write the output and stderr
+        output_dir = self.builder._GetOutputDir(result.commit_upto)
+        Mkdir(output_dir)
+        build_dir = self.builder.GetBuildDir(result.commit_upto,
+                result.brd.target)
+        Mkdir(build_dir)
+
+        outfile = os.path.join(build_dir, 'log')
+        with open(outfile, 'w') as fd:
+            if result.stdout:
+                fd.write(result.stdout)
+
+        errfile = self.builder.GetErrFile(result.commit_upto,
+                result.brd.target)
+        if result.stderr:
+            with open(errfile, 'w') as fd:
+                fd.write(result.stderr)
+        elif os.path.exists(errfile):
+            os.remove(errfile)
+
+        if result.toolchain:
+            # Write the build result and toolchain information.
+            done_file = self.builder.GetDoneFile(result.commit_upto,
+                    result.brd.target)
+            with open(done_file, 'w') as fd:
+                fd.write('%s' % result.return_code)
+            with open(os.path.join(build_dir, 'toolchain'), 'w') as fd:
+                print >>fd, 'gcc', result.toolchain.gcc
+                print >>fd, 'path', result.toolchain.path
+                print >>fd, 'cross', result.toolchain.cross
+                print >>fd, 'arch', result.toolchain.arch
+                fd.write('%s' % result.return_code)
+
+            with open(os.path.join(build_dir, 'toolchain'), 'w') as fd:
+                print >>fd, 'gcc', result.toolchain.gcc
+                print >>fd, 'path', result.toolchain.path
+
+            # Write out the image and function size information and an objdump
+            env = result.toolchain.MakeEnvironment()
+            lines = []
+            for fname in ['u-boot', 'spl/u-boot-spl']:
+                cmd = ['%snm' % self.toolchain.cross, '--size-sort', fname]
+                nm_result = command.RunPipe([cmd], capture=True,
+                        capture_stderr=True, cwd=result.out_dir,
+                        raise_on_error=False, env=env)
+                if nm_result.stdout:
+                    nm = self.builder.GetFuncSizesFile(result.commit_upto,
+                                    result.brd.target, fname)
+                    with open(nm, 'w') as fd:
+                        print >>fd, nm_result.stdout,
+
+                cmd = ['%sobjdump' % self.toolchain.cross, '-h', fname]
+                dump_result = command.RunPipe([cmd], capture=True,
+                        capture_stderr=True, cwd=result.out_dir,
+                        raise_on_error=False, env=env)
+                rodata_size = ''
+                if dump_result.stdout:
+                    objdump = self.builder.GetObjdumpFile(result.commit_upto,
+                                    result.brd.target, fname)
+                    with open(objdump, 'w') as fd:
+                        print >>fd, dump_result.stdout,
+                    for line in dump_result.stdout.splitlines():
+                        fields = line.split()
+                        if len(fields) > 5 and fields[1] == '.rodata':
+                            rodata_size = fields[2]
+
+                cmd = ['%ssize' % self.toolchain.cross, fname]
+                size_result = command.RunPipe([cmd], capture=True,
+                        capture_stderr=True, cwd=result.out_dir,
+                        raise_on_error=False, env=env)
+                if size_result.stdout:
+                    lines.append(size_result.stdout.splitlines()[1] + ' ' +
+                                 rodata_size)
+
+            # Write out the image sizes file. This is similar to the output
+            # of binutil's 'size' utility, but it omits the header line and
+            # adds an additional hex value at the end of each line for the
+            # rodata size
+            if len(lines):
+                sizes = self.builder.GetSizesFile(result.commit_upto,
+                                result.brd.target)
+                with open(sizes, 'w') as fd:
+                    print >>fd, '\n'.join(lines)
+
+        # Now write the actual build output
+        if keep_outputs:
+            patterns = ['u-boot', '*.bin', 'u-boot.dtb', '*.map',
+                        'include/autoconf.mk', 'spl/u-boot-spl',
+                        'spl/u-boot-spl.bin']
+            for pattern in patterns:
+                file_list = glob.glob(os.path.join(result.out_dir, pattern))
+                for fname in file_list:
+                    shutil.copy(fname, build_dir)
+
+
+    def RunJob(self, job):
+        """Run a single job
+
+        A job consists of a building a list of commits for a particular board.
+
+        Args:
+            job: Job to build
+        """
+        brd = job.board
+        work_dir = self.builder.GetThreadDir(self.thread_num)
+        self.toolchain = None
+        if job.commits:
+            # Run 'make board_config' on the first commit
+            do_config = True
+            commit_upto  = 0
+            force_build = False
+            for commit_upto in range(0, len(job.commits), job.step):
+                result, request_config = self.RunCommit(commit_upto, brd,
+                        work_dir, do_config,
+                        force_build or self.builder.force_build)
+                failed = result.return_code or result.stderr
+                if failed and not do_config:
+                    # If our incremental build failed, try building again
+                    # with a reconfig.
+                    if self.builder.force_config_on_failure:
+                        result, request_config = self.RunCommit(commit_upto,
+                            brd, work_dir, True, True)
+                do_config = request_config
+
+                # If we built that commit, then config is done. But if we got
+                # an warning, reconfig next time to force it to build the same
+                # files that created warnings this time. Otherwise an
+                # incremental build may not build the same file, and we will
+                # think that the warning has gone away.
+                # We could avoid this by using -Werror everywhere...
+                # For errors, the problem doesn't happen, since presumably
+                # the build stopped and didn't generate output, so will retry
+                # that file next time. So we could detect warnings and deal
+                # with them specially here. For now, we just reconfigure if
+                # anything goes work.
+                # Of course this is substantially slower if there are build
+                # errors/warnings (e.g. 2-3x slower even if only 10% of builds
+                # have problems).
+                if (failed and not result.already_done and not do_config and
+                        self.builder.force_config_on_failure):
+                    # If this build failed, try the next one with a
+                    # reconfigure.
+                    # Sometimes if the board_config.h file changes it can mess
+                    # with dependencies, and we get:
+                    # make: *** No rule to make target `include/autoconf.mk',
+                    #     needed by `depend'.
+                    do_config = True
+                    force_build = True
+                else:
+                    force_build = False
+                    if self.builder.force_config_on_failure:
+                        if failed:
+                            do_config = True
+                    result.commit_upto = commit_upto
+                    if result.return_code < 0:
+                        raise ValueError('Interrupt')
+
+                # We have the build results, so output the result
+                self._WriteResult(result, job.keep_outputs)
+                self.builder.out_queue.put(result)
+        else:
+            # Just build the currently checked-out build
+            result = self.RunCommit(None, True)
+            result.commit_upto = self.builder.upto
+            self.builder.out_queue.put(result)
+
+    def run(self):
+        """Our thread's run function
+
+        This thread picks a job from the queue, runs it, and then goes to the
+        next job.
+        """
+        alive = True
+        while True:
+            job = self.builder.queue.get()
+            try:
+                if self.builder.active and alive:
+                    self.RunJob(job)
+            except Exception as err:
+                alive = False
+                print err
+            self.builder.queue.task_done()
+
+
+class Builder:
+    """Class for building U-Boot for a particular commit.
+
+    Public members: (many should ->private)
+        active: True if the builder is active and has not been stopped
+        already_done: Number of builds already completed
+        base_dir: Base directory to use for builder
+        checkout: True to check out source, False to skip that step.
+            This is used for testing.
+        col: terminal.Color() object
+        count: Number of commits to build
+        do_make: Method to call to invoke Make
+        fail: Number of builds that failed due to error
+        force_build: Force building even if a build already exists
+        force_config_on_failure: If a commit fails for a board, disable
+            incremental building for the next commit we build for that
+            board, so that we will see all warnings/errors again.
+        git_dir: Git directory containing source repository
+        last_line_len: Length of the last line we printed (used for erasing
+            it with new progress information)
+        num_jobs: Number of jobs to run at once (passed to make as -j)
+        num_threads: Number of builder threads to run
+        out_queue: Queue of results to process
+        re_make_err: Compiled regular expression for ignore_lines
+        queue: Queue of jobs to run
+        threads: List of active threads
+        toolchains: Toolchains object to use for building
+        upto: Current commit number we are building (0.count-1)
+        warned: Number of builds that produced at least one warning
+
+    Private members:
+        _base_board_dict: Last-summarised Dict of boards
+        _base_err_lines: Last-summarised list of errors
+        _build_period_us: Time taken for a single build (float object).
+        _complete_delay: Expected delay until completion (timedelta)
+        _next_delay_update: Next time we plan to display a progress update
+                (datatime)
+        _show_unknown: Show unknown boards (those not built) in summary
+        _timestamps: List of timestamps for the completion of the last
+            last _timestamp_count builds. Each is a datetime object.
+        _timestamp_count: Number of timestamps to keep in our list.
+        _working_dir: Base working directory containing all threads
+    """
+    class Outcome:
+        """Records a build outcome for a single make invocation
+
+        Public Members:
+            rc: Outcome value (OUTCOME_...)
+            err_lines: List of error lines or [] if none
+            sizes: Dictionary of image size information, keyed by filename
+                - Each value is itself a dictionary containing
+                    values for 'text', 'data' and 'bss', being the integer
+                    size in bytes of each section.
+            func_sizes: Dictionary keyed by filename - e.g. 'u-boot'. Each
+                    value is itself a dictionary:
+                        key: function name
+                        value: Size of function in bytes
+        """
+        def __init__(self, rc, err_lines, sizes, func_sizes):
+            self.rc = rc
+            self.err_lines = err_lines
+            self.sizes = sizes
+            self.func_sizes = func_sizes
+
+    def __init__(self, toolchains, base_dir, git_dir, num_threads, num_jobs,
+                 checkout=True, show_unknown=True, step=1):
+        """Create a new Builder object
+
+        Args:
+            toolchains: Toolchains object to use for building
+            base_dir: Base directory to use for builder
+            git_dir: Git directory containing source repository
+            num_threads: Number of builder threads to run
+            num_jobs: Number of jobs to run at once (passed to make as -j)
+            checkout: True to check out source, False to skip that step.
+                This is used for testing.
+            show_unknown: Show unknown boards (those not built) in summary
+            step: 1 to process every commit, n to process every nth commit
+        """
+        self.toolchains = toolchains
+        self.base_dir = base_dir
+        self._working_dir = os.path.join(base_dir, '.bm-work')
+        self.threads = []
+        self.active = True
+        self.do_make = self.Make
+        self.checkout = checkout
+        self.num_threads = num_threads
+        self.num_jobs = num_jobs
+        self.already_done = 0
+        self.force_build = False
+        self.git_dir = git_dir
+        self._show_unknown = show_unknown
+        self._timestamp_count = 10
+        self._build_period_us = None
+        self._complete_delay = None
+        self._next_delay_update = datetime.now()
+        self.force_config_on_failure = True
+        self._step = step
+
+        self.col = terminal.Color()
+
+        self.queue = Queue.Queue()
+        self.out_queue = Queue.Queue()
+        for i in range(self.num_threads):
+            t = BuilderThread(self, i)
+            t.setDaemon(True)
+            t.start()
+            self.threads.append(t)
+
+        self.last_line_len = 0
+        t = ResultThread(self)
+        t.setDaemon(True)
+        t.start()
+        self.threads.append(t)
+
+        ignore_lines = ['(make.*Waiting for unfinished)', '(Segmentation fault)']
+        self.re_make_err = re.compile('|'.join(ignore_lines))
+
+    def __del__(self):
+        """Get rid of all threads created by the builder"""
+        for t in self.threads:
+            del t
+
+    def _AddTimestamp(self):
+        """Add a new timestamp to the list and record the build period.
+
+        The build period is the length of time taken to perform a single
+        build (one board, one commit).
+        """
+        now = datetime.now()
+        self._timestamps.append(now)
+        count = len(self._timestamps)
+        delta = self._timestamps[-1] - self._timestamps[0]
+        seconds = delta.total_seconds()
+
+        # If we have enough data, estimate build period (time taken for a
+        # single build) and therefore completion time.
+        if count > 1 and self._next_delay_update < now:
+            self._next_delay_update = now + timedelta(seconds=2)
+            if seconds > 0:
+                self._build_period = float(seconds) / count
+                todo = self.count - self.upto
+                self._complete_delay = timedelta(microseconds=
+                        self._build_period * todo * 1000000)
+                # Round it
+                self._complete_delay -= timedelta(
+                        microseconds=self._complete_delay.microseconds)
+
+        if seconds > 60:
+            self._timestamps.popleft()
+            count -= 1
+
+    def ClearLine(self, length):
+        """Clear any characters on the current line
+
+        Make way for a new line of length 'length', by outputting enough
+        spaces to clear out the old line. Then remember the new length for
+        next time.
+
+        Args:
+            length: Length of new line, in characters
+        """
+        if length < self.last_line_len:
+            print ' ' * (self.last_line_len - length),
+            print '\r',
+        self.last_line_len = length
+        sys.stdout.flush()
+
+    def SelectCommit(self, commit, checkout=True):
+        """Checkout the selected commit for this build
+        """
+        self.commit = commit
+        if checkout and self.checkout:
+            gitutil.Checkout(commit.hash)
+
+    def Make(self, commit, brd, stage, cwd, *args, **kwargs):
+        """Run make
+
+        Args:
+            commit: Commit object that is being built
+            brd: Board object that is being built
+            stage: Stage that we are at (distclean, config, build)
+            cwd: Directory where make should be run
+            args: Arguments to pass to make
+            kwargs: Arguments to pass to command.RunPipe()
+        """
+        cmd = ['make'] + list(args)
+        result = command.RunPipe([cmd], capture=True, capture_stderr=True,
+                cwd=cwd, raise_on_error=False, **kwargs)
+        return result
+
+    def ProcessResult(self, result):
+        """Process the result of a build, showing progress information
+
+        Args:
+            result: A CommandResult object
+        """
+        col = terminal.Color()
+        if result:
+            target = result.brd.target
+
+            if result.return_code < 0:
+                self.active = False
+                command.StopAll()
+                return
+
+            self.upto += 1
+            if result.return_code != 0:
+                self.fail += 1
+            elif result.stderr:
+                self.warned += 1
+            if result.already_done:
+                self.already_done += 1
+        else:
+            target = '(starting)'
+
+        # Display separate counts for ok, warned and fail
+        ok = self.upto - self.warned - self.fail
+        line = '\r' + self.col.Color(self.col.GREEN, '%5d' % ok)
+        line += self.col.Color(self.col.YELLOW, '%5d' % self.warned)
+        line += self.col.Color(self.col.RED, '%5d' % self.fail)
+
+        name = ' /%-5d  ' % self.count
+
+        # Add our current completion time estimate
+        self._AddTimestamp()
+        if self._complete_delay:
+            name += '%s  : ' % self._complete_delay
+        # When building all boards for a commit, we can print a commit
+        # progress message.
+        if result and result.commit_upto is None:
+            name += 'commit %2d/%-3d' % (self.commit_upto + 1,
+                    self.commit_count)
+
+        name += target
+        print line + name,
+        length = 13 + len(name)
+        self.ClearLine(length)
+
+    def _GetOutputDir(self, commit_upto):
+        """Get the name of the output directory for a commit number
+
+        The output directory is typically .../<branch>/<commit>.
+
+        Args:
+            commit_upto: Commit number to use (0..self.count-1)
+        """
+        commit = self.commits[commit_upto]
+        subject = commit.subject.translate(trans_valid_chars)
+        commit_dir = ('%02d_of_%02d_g%s_%s' % (commit_upto + 1,
+                self.commit_count, commit.hash, subject[:20]))
+        output_dir = os.path.join(self.base_dir, commit_dir)
+        return output_dir
+
+    def GetBuildDir(self, commit_upto, target):
+        """Get the name of the build directory for a commit number
+
+        The build directory is typically .../<branch>/<commit>/<target>.
+
+        Args:
+            commit_upto: Commit number to use (0..self.count-1)
+            target: Target name
+        """
+        output_dir = self._GetOutputDir(commit_upto)
+        return os.path.join(output_dir, target)
+
+    def GetDoneFile(self, commit_upto, target):
+        """Get the name of the done file for a commit number
+
+        Args:
+            commit_upto: Commit number to use (0..self.count-1)
+            target: Target name
+        """
+        return os.path.join(self.GetBuildDir(commit_upto, target), 'done')
+
+    def GetSizesFile(self, commit_upto, target):
+        """Get the name of the sizes file for a commit number
+
+        Args:
+            commit_upto: Commit number to use (0..self.count-1)
+            target: Target name
+        """
+        return os.path.join(self.GetBuildDir(commit_upto, target), 'sizes')
+
+    def GetFuncSizesFile(self, commit_upto, target, elf_fname):
+        """Get the name of the funcsizes file for a commit number and ELF file
+
+        Args:
+            commit_upto: Commit number to use (0..self.count-1)
+            target: Target name
+            elf_fname: Filename of elf image
+        """
+        return os.path.join(self.GetBuildDir(commit_upto, target),
+                            '%s.sizes' % elf_fname.replace('/', '-'))
+
+    def GetObjdumpFile(self, commit_upto, target, elf_fname):
+        """Get the name of the objdump file for a commit number and ELF file
+
+        Args:
+            commit_upto: Commit number to use (0..self.count-1)
+            target: Target name
+            elf_fname: Filename of elf image
+        """
+        return os.path.join(self.GetBuildDir(commit_upto, target),
+                            '%s.objdump' % elf_fname.replace('/', '-'))
+
+    def GetErrFile(self, commit_upto, target):
+        """Get the name of the err file for a commit number
+
+        Args:
+            commit_upto: Commit number to use (0..self.count-1)
+            target: Target name
+        """
+        output_dir = self.GetBuildDir(commit_upto, target)
+        return os.path.join(output_dir, 'err')
+
+    def FilterErrors(self, lines):
+        """Filter out errors in which we have no interest
+
+        We should probably use map().
+
+        Args:
+            lines: List of error lines, each a string
+        Returns:
+            New list with only interesting lines included
+        """
+        out_lines = []
+        for line in lines:
+            if not self.re_make_err.search(line):
+                out_lines.append(line)
+        return out_lines
+
+    def ReadFuncSizes(self, fname, fd):
+        """Read function sizes from the output of 'nm'
+
+        Args:
+            fd: File containing data to read
+            fname: Filename we are reading from (just for errors)
+
+        Returns:
+            Dictionary containing size of each function in bytes, indexed by
+            function name.
+        """
+        sym = {}
+        for line in fd.readlines():
+            try:
+                size, type, name = line[:-1].split()
+            except:
+                print "Invalid line in file '%s': '%s'" % (fname, line[:-1])
+                continue
+            if type in 'tTdDbB':
+                # function names begin with '.' on 64-bit powerpc
+                if '.' in name[1:]:
+                    name = 'static.' + name.split('.')[0]
+                sym[name] = sym.get(name, 0) + int(size, 16)
+        return sym
+
+    def GetBuildOutcome(self, commit_upto, target, read_func_sizes):
+        """Work out the outcome of a build.
+
+        Args:
+            commit_upto: Commit number to check (0..n-1)
+            target: Target board to check
+            read_func_sizes: True to read function size information
+
+        Returns:
+            Outcome object
+        """
+        done_file = self.GetDoneFile(commit_upto, target)
+        sizes_file = self.GetSizesFile(commit_upto, target)
+        sizes = {}
+        func_sizes = {}
+        if os.path.exists(done_file):
+            with open(done_file, 'r') as fd:
+                return_code = int(fd.readline())
+                err_lines = []
+                err_file = self.GetErrFile(commit_upto, target)
+                if os.path.exists(err_file):
+                    with open(err_file, 'r') as fd:
+                        err_lines = self.FilterErrors(fd.readlines())
+
+                # Decide whether the build was ok, failed or created warnings
+                if return_code:
+                    rc = OUTCOME_ERROR
+                elif len(err_lines):
+                    rc = OUTCOME_WARNING
+                else:
+                    rc = OUTCOME_OK
+
+                # Convert size information to our simple format
+                if os.path.exists(sizes_file):
+                    with open(sizes_file, 'r') as fd:
+                        for line in fd.readlines():
+                            values = line.split()
+                            rodata = 0
+                            if len(values) > 6:
+                                rodata = int(values[6], 16)
+                            size_dict = {
+                                'all' : int(values[0]) + int(values[1]) +
+                                        int(values[2]),
+                                'text' : int(values[0]) - rodata,
+                                'data' : int(values[1]),
+                                'bss' : int(values[2]),
+                                'rodata' : rodata,
+                            }
+                            sizes[values[5]] = size_dict
+
+            if read_func_sizes:
+                pattern = self.GetFuncSizesFile(commit_upto, target, '*')
+                for fname in glob.glob(pattern):
+                    with open(fname, 'r') as fd:
+                        dict_name = os.path.basename(fname).replace('.sizes',
+                                                                    '')
+                        func_sizes[dict_name] = self.ReadFuncSizes(fname, fd)
+
+            return Builder.Outcome(rc, err_lines, sizes, func_sizes)
+
+        return Builder.Outcome(OUTCOME_UNKNOWN, [], {}, {})
+
+    def GetResultSummary(self, boards_selected, commit_upto, read_func_sizes):
+        """Calculate a summary of the results of building a commit.
+
+        Args:
+            board_selected: Dict containing boards to summarise
+            commit_upto: Commit number to summarize (0..self.count-1)
+            read_func_sizes: True to read function size information
+
+        Returns:
+            Tuple:
+                Dict containing boards which passed building this commit.
+                    keyed by board.target
+                List containing a summary of error/warning lines
+        """
+        board_dict = {}
+        err_lines_summary = []
+
+        for board in boards_selected.itervalues():
+            outcome = self.GetBuildOutcome(commit_upto, board.target,
+                                           read_func_sizes)
+            board_dict[board.target] = outcome
+            for err in outcome.err_lines:
+                if err and not err.rstrip() in err_lines_summary:
+                    err_lines_summary.append(err.rstrip())
+        return board_dict, err_lines_summary
+
+    def AddOutcome(self, board_dict, arch_list, changes, char, color):
+        """Add an output to our list of outcomes for each architecture
+
+        This simple function adds failing boards (changes) to the
+        relevant architecture string, so we can print the results out
+        sorted by architecture.
+
+        Args:
+             board_dict: Dict containing all boards
+             arch_list: Dict keyed by arch name. Value is a string containing
+                    a list of board names which failed for that arch.
+             changes: List of boards to add to arch_list
+             color: terminal.Colour object
+        """
+        done_arch = {}
+        for target in changes:
+            if target in board_dict:
+                arch = board_dict[target].arch
+            else:
+                arch = 'unknown'
+            str = self.col.Color(color, ' ' + target)
+            if not arch in done_arch:
+                str = self.col.Color(color, char) + '  ' + str
+                done_arch[arch] = True
+            if not arch in arch_list:
+                arch_list[arch] = str
+            else:
+                arch_list[arch] += str
+
+
+    def ColourNum(self, num):
+        color = self.col.RED if num > 0 else self.col.GREEN
+        if num == 0:
+            return '0'
+        return self.col.Color(color, str(num))
+
+    def ResetResultSummary(self, board_selected):
+        """Reset the results summary ready for use.
+
+        Set up the base board list to be all those selected, and set the
+        error lines to empty.
+
+        Following this, calls to PrintResultSummary() will use this
+        information to work out what has changed.
+
+        Args:
+            board_selected: Dict containing boards to summarise, keyed by
+                board.target
+        """
+        self._base_board_dict = {}
+        for board in board_selected:
+            self._base_board_dict[board] = Builder.Outcome(0, [], [], {})
+        self._base_err_lines = []
+
+    def PrintFuncSizeDetail(self, fname, old, new):
+        grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0
+        delta, common = [], {}
+
+        for a in old:
+            if a in new:
+                common[a] = 1
+
+        for name in old:
+            if name not in common:
+                remove += 1
+                down += old[name]
+                delta.append([-old[name], name])
+
+        for name in new:
+            if name not in common:
+                add += 1
+                up += new[name]
+                delta.append([new[name], name])
+
+        for name in common:
+                diff = new.get(name, 0) - old.get(name, 0)
+                if diff > 0:
+                    grow, up = grow + 1, up + diff
+                elif diff < 0:
+                    shrink, down = shrink + 1, down - diff
+                delta.append([diff, name])
+
+        delta.sort()
+        delta.reverse()
+
+        args = [add, -remove, grow, -shrink, up, -down, up - down]
+        if max(args) == 0:
+            return
+        args = [self.ColourNum(x) for x in args]
+        indent = ' ' * 15
+        print ('%s%s: add: %s/%s, grow: %s/%s bytes: %s/%s (%s)' %
+               tuple([indent, self.col.Color(self.col.YELLOW, fname)] + args))
+        print '%s  %-38s %7s %7s %+7s' % (indent, 'function', 'old', 'new',
+                                        'delta')
+        for diff, name in delta:
+            if diff:
+                color = self.col.RED if diff > 0 else self.col.GREEN
+                msg = '%s  %-38s %7s %7s %+7d' % (indent, name,
+                        old.get(name, '-'), new.get(name,'-'), diff)
+                print self.col.Color(color, msg)
+
+
+    def PrintSizeDetail(self, target_list, show_bloat):
+        """Show details size information for each board
+
+        Args:
+            target_list: List of targets, each a dict containing:
+                    'target': Target name
+                    'total_diff': Total difference in bytes across all areas
+                    <part_name>: Difference for that part
+            show_bloat: Show detail for each function
+        """
+        targets_by_diff = sorted(target_list, reverse=True,
+        key=lambda x: x['_total_diff'])
+        for result in targets_by_diff:
+            printed_target = False
+            for name in sorted(result):
+                diff = result[name]
+                if name.startswith('_'):
+                    continue
+                if diff != 0:
+                    color = self.col.RED if diff > 0 else self.col.GREEN
+                msg = ' %s %+d' % (name, diff)
+                if not printed_target:
+                    print '%10s  %-15s:' % ('', result['_target']),
+                    printed_target = True
+                print self.col.Color(color, msg),
+            if printed_target:
+                print
+                if show_bloat:
+                    target = result['_target']
+                    outcome = result['_outcome']
+                    base_outcome = self._base_board_dict[target]
+                    for fname in outcome.func_sizes:
+                        self.PrintFuncSizeDetail(fname,
+                                                 base_outcome.func_sizes[fname],
+                                                 outcome.func_sizes[fname])
+
+
+    def PrintSizeSummary(self, board_selected, board_dict, show_detail,
+                         show_bloat):
+        """Print a summary of image sizes broken down by section.
+
+        The summary takes the form of one line per architecture. The
+        line contains deltas for each of the sections (+ means the section
+        got bigger, - means smaller). The nunmbers are the average number
+        of bytes that a board in this section increased by.
+
+        For example:
+           powerpc: (622 boards)   text -0.0
+          arm: (285 boards)   text -0.0
+          nds32: (3 boards)   text -8.0
+
+        Args:
+            board_selected: Dict containing boards to summarise, keyed by
+                board.target
+            board_dict: Dict containing boards for which we built this
+                commit, keyed by board.target. The value is an Outcome object.
+            show_detail: Show detail for each board
+            show_bloat: Show detail for each function
+        """
+        arch_list = {}
+        arch_count = {}
+
+        # Calculate changes in size for different image parts
+        # The previous sizes are in Board.sizes, for each board
+        for target in board_dict:
+            if target not in board_selected:
+                continue
+            base_sizes = self._base_board_dict[target].sizes
+            outcome = board_dict[target]
+            sizes = outcome.sizes
+
+            # Loop through the list of images, creating a dict of size
+            # changes for each image/part. We end up with something like
+            # {'target' : 'snapper9g45, 'data' : 5, 'u-boot-spl:text' : -4}
+            # which means that U-Boot data increased by 5 bytes and SPL
+            # text decreased by 4.
+            err = {'_target' : target}
+            for image in sizes:
+                if image in base_sizes:
+                    base_image = base_sizes[image]
+                    # Loop through the text, data, bss parts
+                    for part in sorted(sizes[image]):
+                        diff = sizes[image][part] - base_image[part]
+                        col = None
+                        if diff:
+                            if image == 'u-boot':
+                                name = part
+                            else:
+                                name = image + ':' + part
+                            err[name] = diff
+            arch = board_selected[target].arch
+            if not arch in arch_count:
+                arch_count[arch] = 1
+            else:
+                arch_count[arch] += 1
+            if not sizes:
+                pass    # Only add to our list when we have some stats
+            elif not arch in arch_list:
+                arch_list[arch] = [err]
+            else:
+                arch_list[arch].append(err)
+
+        # We now have a list of image size changes sorted by arch
+        # Print out a summary of these
+        for arch, target_list in arch_list.iteritems():
+            # Get total difference for each type
+            totals = {}
+            for result in target_list:
+                total = 0
+                for name, diff in result.iteritems():
+                    if name.startswith('_'):
+                        continue
+                    total += diff
+                    if name in totals:
+                        totals[name] += diff
+                    else:
+                        totals[name] = diff
+                result['_total_diff'] = total
+                result['_outcome'] = board_dict[result['_target']]
+
+            count = len(target_list)
+            printed_arch = False
+            for name in sorted(totals):
+                diff = totals[name]
+                if diff:
+                    # Display the average difference in this name for this
+                    # architecture
+                    avg_diff = float(diff) / count
+                    color = self.col.RED if avg_diff > 0 else self.col.GREEN
+                    msg = ' %s %+1.1f' % (name, avg_diff)
+                    if not printed_arch:
+                        print '%10s: (for %d/%d boards)' % (arch, count,
+                                arch_count[arch]),
+                        printed_arch = True
+                    print self.col.Color(color, msg),
+
+            if printed_arch:
+                print
+                if show_detail:
+                    self.PrintSizeDetail(target_list, show_bloat)
+
+
+    def PrintResultSummary(self, board_selected, board_dict, err_lines,
+                           show_sizes, show_detail, show_bloat):
+        """Compare results with the base results and display delta.
+
+        Only boards mentioned in board_selected will be considered. This
+        function is intended to be called repeatedly with the results of
+        each commit. It therefore shows a 'diff' between what it saw in
+        the last call and what it sees now.
+
+        Args:
+            board_selected: Dict containing boards to summarise, keyed by
+                board.target
+            board_dict: Dict containing boards for which we built this
+                commit, keyed by board.target. The value is an Outcome object.
+            err_lines: A list of errors for this commit, or [] if there is
+                none, or we don't want to print errors
+            show_sizes: Show image size deltas
+            show_detail: Show detail for each board
+            show_bloat: Show detail for each function
+        """
+        better = []     # List of boards fixed since last commit
+        worse = []      # List of new broken boards since last commit
+        new = []        # List of boards that didn't exist last time
+        unknown = []    # List of boards that were not built
+
+        for target in board_dict:
+            if target not in board_selected:
+                continue
+
+            # If the board was built last time, add its outcome to a list
+            if target in self._base_board_dict:
+                base_outcome = self._base_board_dict[target].rc
+                outcome = board_dict[target]
+                if outcome.rc == OUTCOME_UNKNOWN:
+                    unknown.append(target)
+                elif outcome.rc < base_outcome:
+                    better.append(target)
+                elif outcome.rc > base_outcome:
+                    worse.append(target)
+            else:
+                new.append(target)
+
+        # Get a list of errors that have appeared, and disappeared
+        better_err = []
+        worse_err = []
+        for line in err_lines:
+            if line not in self._base_err_lines:
+                worse_err.append('+' + line)
+        for line in self._base_err_lines:
+            if line not in err_lines:
+                better_err.append('-' + line)
+
+        # Display results by arch
+        if better or worse or unknown or new or worse_err or better_err:
+            arch_list = {}
+            self.AddOutcome(board_selected, arch_list, better, '',
+                    self.col.GREEN)
+            self.AddOutcome(board_selected, arch_list, worse, '+',
+                    self.col.RED)
+            self.AddOutcome(board_selected, arch_list, new, '*', self.col.BLUE)
+            if self._show_unknown:
+                self.AddOutcome(board_selected, arch_list, unknown, '?',
+                        self.col.MAGENTA)
+            for arch, target_list in arch_list.iteritems():
+                print '%10s: %s' % (arch, target_list)
+            if better_err:
+                print self.col.Color(self.col.GREEN, '\n'.join(better_err))
+            if worse_err:
+                print self.col.Color(self.col.RED, '\n'.join(worse_err))
+
+        if show_sizes:
+            self.PrintSizeSummary(board_selected, board_dict, show_detail,
+                                  show_bloat)
+
+        # Save our updated information for the next call to this function
+        self._base_board_dict = board_dict
+        self._base_err_lines = err_lines
+
+        # Get a list of boards that did not get built, if needed
+        not_built = []
+        for board in board_selected:
+            if not board in board_dict:
+                not_built.append(board)
+        if not_built:
+            print "Boards not built (%d): %s" % (len(not_built),
+                    ', '.join(not_built))
+
+
+    def ShowSummary(self, commits, board_selected, show_errors, show_sizes,
+                    show_detail, show_bloat):
+        """Show a build summary for U-Boot for a given board list.
+
+        Reset the result summary, then repeatedly call GetResultSummary on
+        each commit's results, then display the differences we see.
+
+        Args:
+            commit: Commit objects to summarise
+            board_selected: Dict containing boards to summarise
+            show_errors: Show errors that occured
+            show_sizes: Show size deltas
+            show_detail: Show detail for each board
+            show_bloat: Show detail for each function
+        """
+        self.commit_count = len(commits)
+        self.commits = commits
+        self.ResetResultSummary(board_selected)
+
+        for commit_upto in range(0, self.commit_count, self._step):
+            board_dict, err_lines = self.GetResultSummary(board_selected,
+                    commit_upto, read_func_sizes=show_bloat)
+            msg = '%02d: %s' % (commit_upto + 1, commits[commit_upto].subject)
+            print self.col.Color(self.col.BLUE, msg)
+            self.PrintResultSummary(board_selected, board_dict,
+                    err_lines if show_errors else [], show_sizes, show_detail,
+                    show_bloat)
+
+
+    def SetupBuild(self, board_selected, commits):
+        """Set up ready to start a build.
+
+        Args:
+            board_selected: Selected boards to build
+            commits: Selected commits to build
+        """
+        # First work out how many commits we will build
+        count = (len(commits) + self._step - 1) / self._step
+        self.count = len(board_selected) * count
+        self.upto = self.warned = self.fail = 0
+        self._timestamps = collections.deque()
+
+    def BuildBoardsForCommit(self, board_selected, keep_outputs):
+        """Build all boards for a single commit"""
+        self.SetupBuild(board_selected)
+        self.count = len(board_selected)
+        for brd in board_selected.itervalues():
+            job = BuilderJob()
+            job.board = brd
+            job.commits = None
+            job.keep_outputs = keep_outputs
+            self.queue.put(brd)
+
+        self.queue.join()
+        self.out_queue.join()
+        print
+        self.ClearLine(0)
+
+    def BuildCommits(self, commits, board_selected, show_errors, keep_outputs):
+        """Build all boards for all commits (non-incremental)"""
+        self.commit_count = len(commits)
+
+        self.ResetResultSummary(board_selected)
+        for self.commit_upto in range(self.commit_count):
+            self.SelectCommit(commits[self.commit_upto])
+            self.SelectOutputDir()
+            Mkdir(self.output_dir)
+
+            self.BuildBoardsForCommit(board_selected, keep_outputs)
+            board_dict, err_lines = self.GetResultSummary()
+            self.PrintResultSummary(board_selected, board_dict,
+                err_lines if show_errors else [])
+
+        if self.already_done:
+            print '%d builds already done' % self.already_done
+
+    def GetThreadDir(self, thread_num):
+        """Get the directory path to the working dir for a thread.
+
+        Args:
+            thread_num: Number of thread to check.
+        """
+        return os.path.join(self._working_dir, '%02d' % thread_num)
+
+    def _PrepareThread(self, thread_num):
+        """Prepare the working directory for a thread.
+
+        This clones or fetches the repo into the thread's work directory.
+
+        Args:
+            thread_num: Thread number (0, 1, ...)
+        """
+        thread_dir = self.GetThreadDir(thread_num)
+        Mkdir(thread_dir)
+        git_dir = os.path.join(thread_dir, '.git')
+
+        # Clone the repo if it doesn't already exist
+        # TODO(sjg@chromium): Perhaps some git hackery to symlink instead, so
+        # we have a private index but uses the origin repo's contents?
+        if self.git_dir:
+            src_dir = os.path.abspath(self.git_dir)
+            if os.path.exists(git_dir):
+                gitutil.Fetch(git_dir, thread_dir)
+            else:
+                print 'Cloning repo for thread %d' % thread_num
+                gitutil.Clone(src_dir, thread_dir)
+
+    def _PrepareWorkingSpace(self, max_threads):
+        """Prepare the working directory for use.
+
+        Set up the git repo for each thread.
+
+        Args:
+            max_threads: Maximum number of threads we expect to need.
+        """
+        Mkdir(self._working_dir)
+        for thread in range(max_threads):
+            self._PrepareThread(thread)
+
+    def _PrepareOutputSpace(self):
+        """Get the output directories ready to receive files.
+
+        We delete any output directories which look like ones we need to
+        create. Having left over directories is confusing when the user wants
+        to check the output manually.
+        """
+        dir_list = []
+        for commit_upto in range(self.commit_count):
+            dir_list.append(self._GetOutputDir(commit_upto))
+
+        for dirname in glob.glob(os.path.join(self.base_dir, '*')):
+            if dirname not in dir_list:
+                shutil.rmtree(dirname)
+
+    def BuildBoards(self, commits, board_selected, show_errors, keep_outputs):
+        """Build all commits for a list of boards
+
+        Args:
+            commits: List of commits to be build, each a Commit object
+            boards_selected: Dict of selected boards, key is target name,
+                    value is Board object
+            show_errors: True to show summarised error/warning info
+            keep_outputs: True to save build output files
+        """
+        self.commit_count = len(commits)
+        self.commits = commits
+
+        self.ResetResultSummary(board_selected)
+        Mkdir(self.base_dir)
+        self._PrepareWorkingSpace(min(self.num_threads, len(board_selected)))
+        self._PrepareOutputSpace()
+        self.SetupBuild(board_selected, commits)
+        self.ProcessResult(None)
+
+        # Create jobs to build all commits for each board
+        for brd in board_selected.itervalues():
+            job = BuilderJob()
+            job.board = brd
+            job.commits = commits
+            job.keep_outputs = keep_outputs
+            job.step = self._step
+            self.queue.put(job)
+
+        # Wait until all jobs are started
+        self.queue.join()
+
+        # Wait until we have processed all output
+        self.out_queue.join()
+        print
+        self.ClearLine(0)
diff --git a/tools/buildman/buildman b/tools/buildman/buildman
new file mode 120000
index 0000000..e4fba2d
--- /dev/null
+++ b/tools/buildman/buildman
@@ -0,0 +1 @@
+buildman.py
\ No newline at end of file
diff --git a/tools/buildman/buildman.py b/tools/buildman/buildman.py
new file mode 100755
index 0000000..7b05d0f
--- /dev/null
+++ b/tools/buildman/buildman.py
@@ -0,0 +1,126 @@
+#!/usr/bin/python
+#
+# Copyright (c) 2012 The Chromium OS Authors.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+"""See README for more information"""
+
+import multiprocessing
+from optparse import OptionParser
+import os
+import re
+import sys
+import unittest
+
+# Bring in the patman libraries
+our_path = os.path.dirname(os.path.realpath(__file__))
+sys.path.append(os.path.join(our_path, '../patman'))
+
+# Our modules
+import board
+import builder
+import checkpatch
+import command
+import control
+import doctest
+import gitutil
+import patchstream
+import terminal
+import toolchain
+
+def RunTests():
+    import test
+
+    sys.argv = [sys.argv[0]]
+    suite = unittest.TestLoader().loadTestsFromTestCase(test.TestBuild)
+    result = unittest.TestResult()
+    suite.run(result)
+
+    # TODO: Surely we can just 'print' result?
+    print result
+    for test, err in result.errors:
+        print err
+    for test, err in result.failures:
+        print err
+
+
+parser = OptionParser()
+parser.add_option('-b', '--branch', type='string',
+       help='Branch name to build')
+parser.add_option('-B', '--bloat', dest='show_bloat',
+       action='store_true', default=False,
+       help='Show changes in function code size for each board')
+parser.add_option('-c', '--count', dest='count', type='int',
+       default=-1, help='Run build on the top n commits')
+parser.add_option('-e', '--show_errors', action='store_true',
+       default=False, help='Show errors and warnings')
+parser.add_option('-f', '--force-build', dest='force_build',
+       action='store_true', default=False,
+       help='Force build of boards even if already built')
+parser.add_option('-d', '--detail', dest='show_detail',
+       action='store_true', default=False,
+       help='Show detailed information for each board in summary')
+parser.add_option('-g', '--git', type='string',
+       help='Git repo containing branch to build', default='.')
+parser.add_option('-H', '--full-help', action='store_true', dest='full_help',
+       default=False, help='Display the README file')
+parser.add_option('-j', '--jobs', dest='jobs', type='int',
+       default=None, help='Number of jobs to run at once (passed to make)')
+parser.add_option('-k', '--keep-outputs', action='store_true',
+       default=False, help='Keep all build output files (e.g. binaries)')
+parser.add_option('--list-tool-chains', action='store_true', default=False,
+       help='List available tool chains')
+parser.add_option('-n', '--dry-run', action='store_true', dest='dry_run',
+       default=False, help="Do a try run (describe actions, but no nothing)")
+parser.add_option('-Q', '--quick', action='store_true',
+       default=False, help='Do a rough build, with limited warning resolution')
+parser.add_option('-s', '--summary', action='store_true',
+       default=False, help='Show a build summary')
+parser.add_option('-S', '--show-sizes', action='store_true',
+       default=False, help='Show image size variation in summary')
+parser.add_option('--step', type='int',
+       default=1, help='Only build every n commits (0=just first and last)')
+parser.add_option('-t', '--test', action='store_true', dest='test',
+                  default=False, help='run tests')
+parser.add_option('-T', '--threads', type='int',
+       default=None, help='Number of builder threads to use')
+parser.add_option('-u', '--show_unknown', action='store_true',
+       default=False, help='Show boards with unknown build result')
+
+parser.usage = """buildman -b <branch> [options]
+
+Build U-Boot for all commits in a branch. Use -n to do a dry run"""
+
+(options, args) = parser.parse_args()
+
+# Run our meagre tests
+if options.test:
+    RunTests()
+elif options.full_help:
+    pager = os.getenv('PAGER')
+    if not pager:
+        pager = 'more'
+    fname = os.path.join(os.path.dirname(sys.argv[0]), 'README')
+    command.Run(pager, fname)
+
+# Build selected commits for selected boards
+else:
+    control.DoBuildman(options, args)
diff --git a/tools/buildman/control.py b/tools/buildman/control.py
new file mode 100644
index 0000000..8d7b9b5
--- /dev/null
+++ b/tools/buildman/control.py
@@ -0,0 +1,181 @@
+# Copyright (c) 2013 The Chromium OS Authors.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+import multiprocessing
+import os
+import sys
+
+import board
+import bsettings
+from builder import Builder
+import gitutil
+import patchstream
+import terminal
+import toolchain
+
+def GetPlural(count):
+    """Returns a plural 's' if count is not 1"""
+    return 's' if count != 1 else ''
+
+def GetActionSummary(is_summary, count, selected, options):
+    """Return a string summarising the intended action.
+
+    Returns:
+        Summary string.
+    """
+    count = (count + options.step - 1) / options.step
+    str = '%s %d commit%s for %d boards' % (
+        'Summary of' if is_summary else 'Building', count, GetPlural(count),
+        len(selected))
+    str += ' (%d thread%s, %d job%s per thread)' % (options.threads,
+            GetPlural(options.threads), options.jobs, GetPlural(options.jobs))
+    return str
+
+def ShowActions(series, why_selected, boards_selected, builder, options):
+    """Display a list of actions that we would take, if not a dry run.
+
+    Args:
+        series: Series object
+        why_selected: Dictionary where each key is a buildman argument
+                provided by the user, and the value is the boards brought
+                in by that argument. For example, 'arm' might bring in
+                400 boards, so in this case the key would be 'arm' and
+                the value would be a list of board names.
+        boards_selected: Dict of selected boards, key is target name,
+                value is Board object
+        builder: The builder that will be used to build the commits
+        options: Command line options object
+    """
+    col = terminal.Color()
+    print 'Dry run, so not doing much. But I would do this:'
+    print
+    print GetActionSummary(False, len(series.commits), boards_selected,
+            options)
+    print 'Build directory: %s' % builder.base_dir
+    for upto in range(0, len(series.commits), options.step):
+        commit = series.commits[upto]
+        print '   ', col.Color(col.YELLOW, commit.hash, bright=False),
+        print commit.subject
+    print
+    for arg in why_selected:
+        if arg != 'all':
+            print arg, ': %d boards' % why_selected[arg]
+    print ('Total boards to build for each commit: %d\n' %
+            why_selected['all'])
+
+def DoBuildman(options, args):
+    """The main control code for buildman
+
+    Args:
+        options: Command line options object
+        args: Command line arguments (list of strings)
+    """
+    gitutil.Setup()
+
+    bsettings.Setup()
+    options.git_dir = os.path.join(options.git, '.git')
+
+    toolchains = toolchain.Toolchains()
+    toolchains.Scan(options.list_tool_chains)
+    if options.list_tool_chains:
+        toolchains.List()
+        print
+        return
+
+    # Work out how many commits to build. We want to build everything on the
+    # branch. We also build the upstream commit as a control so we can see
+    # problems introduced by the first commit on the branch.
+    col = terminal.Color()
+    count = options.count
+    if count == -1:
+        if not options.branch:
+            str = 'Please use -b to specify a branch to build'
+            print col.Color(col.RED, str)
+            sys.exit(1)
+        count = gitutil.CountCommitsInBranch(options.git_dir, options.branch)
+        count += 1   # Build upstream commit also
+
+    if not count:
+        str = ("No commits found to process in branch '%s': "
+               "set branch's upstream or use -c flag" % options.branch)
+        print col.Color(col.RED, str)
+        sys.exit(1)
+
+    # Work out what subset of the boards we are building
+    boards = board.Boards()
+    boards.ReadBoards(os.path.join(options.git, 'boards.cfg'))
+    why_selected = boards.SelectBoards(args)
+    selected = boards.GetSelected()
+    if not len(selected):
+        print col.Color(col.RED, 'No matching boards found')
+        sys.exit(1)
+
+    # Read the metadata from the commits. First look at the upstream commit,
+    # then the ones in the branch. We would like to do something like
+    # upstream/master~..branch but that isn't possible if upstream/master is
+    # a merge commit (it will list all the commits that form part of the
+    # merge)
+    range_expr = gitutil.GetRangeInBranch(options.git_dir, options.branch)
+    upstream_commit = gitutil.GetUpstream(options.git_dir, options.branch)
+    series = patchstream.GetMetaDataForList(upstream_commit, options.git_dir,
+            1)
+    series = patchstream.GetMetaDataForList(range_expr, options.git_dir, None,
+            series)
+
+    # By default we have one thread per CPU. But if there are not enough jobs
+    # we can have fewer threads and use a high '-j' value for make.
+    if not options.threads:
+        options.threads = min(multiprocessing.cpu_count(), len(selected))
+    if not options.jobs:
+        options.jobs = max(1, (multiprocessing.cpu_count() +
+                len(selected) - 1) / len(selected))
+
+    if not options.step:
+        options.step = len(series.commits) - 1
+
+    # Create a new builder with the selected options
+    output_dir = os.path.join('..', options.branch)
+    builder = Builder(toolchains, output_dir, options.git_dir,
+            options.threads, options.jobs, checkout=True,
+            show_unknown=options.show_unknown, step=options.step)
+    builder.force_config_on_failure = not options.quick
+
+    # For a dry run, just show our actions as a sanity check
+    if options.dry_run:
+        ShowActions(series, why_selected, selected, builder, options)
+    else:
+        builder.force_build = options.force_build
+
+        # Work out which boards to build
+        board_selected = boards.GetSelectedDict()
+
+        print GetActionSummary(options.summary, count, board_selected, options)
+
+        if options.summary:
+            # We can't show function sizes without board details at present
+            if options.show_bloat:
+                options.show_detail = True
+            builder.ShowSummary(series.commits, board_selected,
+                    options.show_errors, options.show_sizes,
+                    options.show_detail, options.show_bloat)
+        else:
+            builder.BuildBoards(series.commits, board_selected,
+                    options.show_errors, options.keep_outputs)
diff --git a/tools/buildman/test.py b/tools/buildman/test.py
new file mode 100644
index 0000000..9330fa5
--- /dev/null
+++ b/tools/buildman/test.py
@@ -0,0 +1,185 @@
+#
+# Copyright (c) 2012 The Chromium OS Authors.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+import os
+import shutil
+import sys
+import tempfile
+import time
+import unittest
+
+# Bring in the patman libraries
+our_path = os.path.dirname(os.path.realpath(__file__))
+sys.path.append(os.path.join(our_path, '../patman'))
+
+import board
+import bsettings
+import builder
+import control
+import command
+import commit
+import toolchain
+
+errors = [
+    '''main.c: In function 'main_loop':
+main.c:260:6: warning: unused variable 'joe' [-Wunused-variable]
+''',
+    '''main.c: In function 'main_loop':
+main.c:295:2: error: 'fred' undeclared (first use in this function)
+main.c:295:2: note: each undeclared identifier is reported only once for each function it appears in
+make[1]: *** [main.o] Error 1
+make: *** [common/libcommon.o] Error 2
+Make failed
+''',
+    '''main.c: In function 'main_loop':
+main.c:280:6: warning: unused variable 'mary' [-Wunused-variable]
+''',
+    '''powerpc-linux-ld: warning: dot moved backwards before `.bss'
+powerpc-linux-ld: warning: dot moved backwards before `.bss'
+powerpc-linux-ld: u-boot: section .text lma 0xfffc0000 overlaps previous sections
+powerpc-linux-ld: u-boot: section .rodata lma 0xfffef3ec overlaps previous sections
+powerpc-linux-ld: u-boot: section .reloc lma 0xffffa400 overlaps previous sections
+powerpc-linux-ld: u-boot: section .data lma 0xffffcd38 overlaps previous sections
+powerpc-linux-ld: u-boot: section .u_boot_cmd lma 0xffffeb40 overlaps previous sections
+powerpc-linux-ld: u-boot: section .bootpg lma 0xfffff198 overlaps previous sections
+'''
+]
+
+
+# hash, subject, return code, list of errors/warnings
+commits = [
+    ['1234', 'upstream/master, ok', 0, []],
+    ['5678', 'Second commit, a warning', 0, errors[0:1]],
+    ['9012', 'Third commit, error', 1, errors[0:2]],
+    ['3456', 'Fourth commit, warning', 0, [errors[0], errors[2]]],
+    ['7890', 'Fifth commit, link errors', 1, [errors[0], errors[3]]],
+    ['abcd', 'Sixth commit, fixes all errors', 0, []]
+]
+
+boards = [
+    ['board0', 'arm', 'armv7', 'ARM Board 1', 'Tester', '', ''],
+    ['board1', 'arm', 'armv7', 'ARM Board 2', 'Tester', '', ''],
+    ['board2', 'powerpc', 'powerpc', 'PowerPC board 1', 'Tester', '', ''],
+    ['board3', 'powerpc', 'mpc5xx', 'PowerPC board 2', 'Tester', '', ''],
+    ['board4', 'sandbox', 'sandbox', 'Sandbox board', 'Tester', '', '']
+]
+
+class Options:
+    """Class that holds build options"""
+    pass
+
+class TestBuild(unittest.TestCase):
+    """Test buildman
+
+    TODO: Write tests for the rest of the functionality
+    """
+    def setUp(self):
+        # Set up commits to build
+        self.commits = []
+        sequence = 0
+        for commit_info in commits:
+            comm = commit.Commit(commit_info[0])
+            comm.subject = commit_info[1]
+            comm.return_code = commit_info[2]
+            comm.error_list = commit_info[3]
+            comm.sequence = sequence
+            sequence += 1
+            self.commits.append(comm)
+
+        # Set up boards to build
+        self.boards = board.Boards()
+        for brd in boards:
+            self.boards.AddBoard(board.Board(*brd))
+        self.boards.SelectBoards([])
+
+        # Set up the toolchains
+        bsettings.Setup()
+        self.toolchains = toolchain.Toolchains()
+        self.toolchains.Add('arm-linux-gcc', test=False)
+        self.toolchains.Add('sparc-linux-gcc', test=False)
+        self.toolchains.Add('powerpc-linux-gcc', test=False)
+        self.toolchains.Add('gcc', test=False)
+
+    def Make(self, commit, brd, stage, *args, **kwargs):
+        result = command.CommandResult()
+        boardnum = int(brd.target[-1])
+        result.return_code = 0
+        result.stderr = ''
+        result.stdout = ('This is the test output for board %s, commit %s' %
+                (brd.target, commit.hash))
+        if boardnum >= 1 and boardnum >= commit.sequence:
+            result.return_code = commit.return_code
+            result.stderr = ''.join(commit.error_list)
+        if stage == 'build':
+            target_dir = None
+            for arg in args:
+                if arg.startswith('O='):
+                    target_dir = arg[2:]
+
+            if not os.path.isdir(target_dir):
+                os.mkdir(target_dir)
+            #time.sleep(.2 + boardnum * .2)
+
+        result.combined = result.stdout + result.stderr
+        return result
+
+    def testBasic(self):
+        """Test basic builder operation"""
+        output_dir = tempfile.mkdtemp()
+        if not os.path.isdir(output_dir):
+            os.mkdir(output_dir)
+        build = builder.Builder(self.toolchains, output_dir, None, 1, 2,
+                                checkout=False, show_unknown=False)
+        build.do_make = self.Make
+        board_selected = self.boards.GetSelectedDict()
+
+        #build.BuildCommits(self.commits, board_selected, False)
+        build.BuildBoards(self.commits, board_selected, False, False)
+        build.ShowSummary(self.commits, board_selected, True, False,
+                          False, False)
+
+    def _testGit(self):
+        """Test basic builder operation by building a branch"""
+        base_dir = tempfile.mkdtemp()
+        if not os.path.isdir(base_dir):
+            os.mkdir(base_dir)
+        options = Options()
+        options.git = os.getcwd()
+        options.summary = False
+        options.jobs = None
+        options.dry_run = False
+        #options.git = os.path.join(base_dir, 'repo')
+        options.branch = 'test-buildman'
+        options.force_build = False
+        options.list_tool_chains = False
+        options.count = -1
+        options.git_dir = None
+        options.threads = None
+        options.show_unknown = False
+        options.quick = False
+        options.show_errors = False
+        options.keep_outputs = False
+        args = ['tegra20']
+        control.DoBuildman(options, args)
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tools/buildman/toolchain.py b/tools/buildman/toolchain.py
new file mode 100644
index 0000000..e0a6970
--- /dev/null
+++ b/tools/buildman/toolchain.py
@@ -0,0 +1,185 @@
+# Copyright (c) 2012 The Chromium OS Authors.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+import glob
+import os
+
+import bsettings
+import command
+
+class Toolchain:
+    """A single toolchain
+
+    Public members:
+        gcc: Full path to C compiler
+        path: Directory path containing C compiler
+        cross: Cross compile string, e.g. 'arm-linux-'
+        arch: Architecture of toolchain as determined from the first
+                component of the filename. E.g. arm-linux-gcc becomes arm
+    """
+
+    def __init__(self, fname, test, verbose=False):
+        """Create a new toolchain object.
+
+        Args:
+            fname: Filename of the gcc component
+            test: True to run the toolchain to test it
+        """
+        self.gcc = fname
+        self.path = os.path.dirname(fname)
+        self.cross = os.path.basename(fname)[:-3]
+        pos = self.cross.find('-')
+        self.arch = self.cross[:pos] if pos != -1 else 'sandbox'
+
+        env = self.MakeEnvironment()
+
+        # As a basic sanity check, run the C compiler with --version
+        cmd = [fname, '--version']
+        if test:
+            result = command.RunPipe([cmd], capture=True, env=env)
+            self.ok = result.return_code == 0
+            if verbose:
+                print 'Tool chain test: ',
+                if self.ok:
+                    print 'OK'
+                else:
+                    print 'BAD'
+                    print 'Command: ', cmd
+                    print result.stdout
+                    print result.stderr
+        else:
+            self.ok = True
+        self.priority = self.GetPriority(fname)
+
+    def GetPriority(self, fname):
+        """Return the priority of the toolchain.
+
+        Toolchains are ranked according to their suitability by their
+        filename prefix.
+
+        Args:
+            fname: Filename of toolchain
+        Returns:
+            Priority of toolchain, 0=highest, 20=lowest.
+        """
+        priority_list = ['-elf', '-unknown-linux-gnu', '-linux', '-elf',
+            '-none-linux-gnueabi', '-uclinux', '-none-eabi',
+            '-gentoo-linux-gnu', '-linux-gnueabi', '-le-linux', '-uclinux']
+        for prio in range(len(priority_list)):
+            if priority_list[prio] in fname:
+                return prio
+        return prio
+
+    def MakeEnvironment(self):
+        """Returns an environment for using the toolchain.
+
+        Thie takes the current environment, adds CROSS_COMPILE and
+        augments PATH so that the toolchain will operate correctly.
+        """
+        env = dict(os.environ)
+        env['CROSS_COMPILE'] = self.cross
+        env['PATH'] += (':' + self.path)
+        return env
+
+
+class Toolchains:
+    """Manage a list of toolchains for building U-Boot
+
+    We select one toolchain for each architecture type
+
+    Public members:
+        toolchains: Dict of Toolchain objects, keyed by architecture name
+        paths: List of paths to check for toolchains (may contain wildcards)
+    """
+
+    def __init__(self):
+        self.toolchains = {}
+        self.paths = []
+        for name, value in bsettings.GetItems('toolchain'):
+            if '*' in value:
+                self.paths += glob.glob(value)
+            else:
+                self.paths.append(value)
+
+
+    def Add(self, fname, test=True, verbose=False):
+        """Add a toolchain to our list
+
+        We select the given toolchain as our preferred one for its
+        architecture if it is a higher priority than the others.
+
+        Args:
+            fname: Filename of toolchain's gcc driver
+            test: True to run the toolchain to test it
+        """
+        toolchain = Toolchain(fname, test, verbose)
+        add_it = toolchain.ok
+        if toolchain.arch in self.toolchains:
+            add_it = (toolchain.priority <
+                        self.toolchains[toolchain.arch].priority)
+        if add_it:
+            self.toolchains[toolchain.arch] = toolchain
+
+    def Scan(self, verbose):
+        """Scan for available toolchains and select the best for each arch.
+
+        We look for all the toolchains we can file, figure out the
+        architecture for each, and whether it works. Then we select the
+        highest priority toolchain for each arch.
+
+        Args:
+            verbose: True to print out progress information
+        """
+        if verbose: print 'Scanning for tool chains'
+        for path in self.paths:
+            if verbose: print "   - scanning path '%s'" % path
+            for subdir in ['.', 'bin', 'usr/bin']:
+                dirname = os.path.join(path, subdir)
+                if verbose: print "      - looking in '%s'" % dirname
+                for fname in glob.glob(dirname + '/*gcc'):
+                    if verbose: print "         - found '%s'" % fname
+                    self.Add(fname, True, verbose)
+
+    def List(self):
+        """List out the selected toolchains for each architecture"""
+        print 'List of available toolchains (%d):' % len(self.toolchains)
+        if len(self.toolchains):
+            for key, value in sorted(self.toolchains.iteritems()):
+                print '%-10s: %s' % (key, value.gcc)
+        else:
+            print 'None'
+
+    def Select(self, arch):
+        """Returns the toolchain for a given architecture
+
+        Args:
+            args: Name of architecture (e.g. 'arm', 'ppc_8xx')
+
+        returns:
+            toolchain object, or None if none found
+        """
+        for name, value in bsettings.GetItems('toolchain-alias'):
+            if arch == name:
+                arch = value
+
+        if not arch in self.toolchains:
+            raise ValueError, ("No tool chain found for arch '%s'" % arch)
+        return self.toolchains[arch]
diff --git a/tools/patman/README b/tools/patman/README
index 1832ebd..d4e7f36 100644
--- a/tools/patman/README
+++ b/tools/patman/README
@@ -68,7 +68,7 @@ will get a consistent result each time.
 How to configure it
 ===================
 
-For most cases of using patman for U-Boot developement patman will
+For most cases of using patman for U-Boot development, patman will
 locate and use the file 'doc/git-mailrc' in your U-Boot directory.
 This contains most of the aliases you will need.
 
@@ -182,6 +182,10 @@ END
 	Sets the cover letter contents for the series. The first line
 	will become the subject of the cover letter
 
+Cover-letter-cc: email / alias
+	Additional email addresses / aliases to send cover letter to (you
+	can add this multiple times)
+
 Series-notes:
 blah blah
 blah blah
@@ -198,8 +202,9 @@ END
 	override the default signoff that patman automatically adds.
 
  Tested-by: Their Name <email>
+ Reviewed-by: Their Name <email>
  Acked-by: Their Name <email>
-	These indicate that someone has acked or tested your patch.
+	These indicate that someone has tested/reviewed/acked your patch.
 	When you get this reply on the mailing list, you can add this
 	tag to the relevant commit and the script will include it when
 	you send out the next version. If 'Tested-by:' is set to
@@ -231,7 +236,6 @@ TEST=...
 Change-Id:
 Review URL:
 Reviewed-on:
-Reviewed-by:
 
 
 Exercise for the reader: Try adding some tags to one of your current
@@ -263,7 +267,13 @@ will create a patch which is copied to x86, arm, sandbox, mikef, ag and
 afleming.
 
 If you have a cover letter it will get sent to the union of the CC lists of
-all of the other patches.
+all of the other patches. If you want to sent it to additional people you
+can add a tag:
+
+Cover-letter-cc: <list of addresses>
+
+These people will get the cover letter even if they are not on the To/Cc
+list for any of the patches.
 
 
 Example Work Flow
diff --git a/tools/patman/checkpatch.py b/tools/patman/checkpatch.py
index d3a0477..83aaf71 100644
--- a/tools/patman/checkpatch.py
+++ b/tools/patman/checkpatch.py
@@ -19,6 +19,7 @@
 # MA 02111-1307 USA
 #
 
+import collections
 import command
 import gitutil
 import os
@@ -57,63 +58,86 @@ def CheckPatch(fname, verbose=False):
     """Run checkpatch.pl on a file.
 
     Returns:
-        4-tuple containing:
-            result: False=failure, True=ok
+        namedtuple containing:
+            ok: False=failure, True=ok
             problems: List of problems, each a dict:
                 'type'; error or warning
                 'msg': text message
                 'file' : filename
                 'line': line number
+            errors: Number of errors
+            warnings: Number of warnings
+            checks: Number of checks
             lines: Number of lines
+            stdout: Full output of checkpatch
     """
-    result = False
-    error_count, warning_count, lines = 0, 0, 0
-    problems = []
+    fields = ['ok', 'problems', 'errors', 'warnings', 'checks', 'lines',
+              'stdout']
+    result = collections.namedtuple('CheckPatchResult', fields)
+    result.ok = False
+    result.errors, result.warning, result.checks = 0, 0, 0
+    result.lines = 0
+    result.problems = []
     chk = FindCheckPatch()
     item = {}
-    stdout = command.Output(chk, '--no-tree', fname)
+    result.stdout = command.Output(chk, '--no-tree', fname)
     #pipe = subprocess.Popen(cmd, stdout=subprocess.PIPE)
     #stdout, stderr = pipe.communicate()
 
     # total: 0 errors, 0 warnings, 159 lines checked
+    # or:
+    # total: 0 errors, 2 warnings, 7 checks, 473 lines checked
     re_stats = re.compile('total: (\\d+) errors, (\d+) warnings, (\d+)')
+    re_stats_full = re.compile('total: (\\d+) errors, (\d+) warnings, (\d+)'
+                               ' checks, (\d+)')
     re_ok = re.compile('.*has no obvious style problems')
     re_bad = re.compile('.*has style problems, please review')
     re_error = re.compile('ERROR: (.*)')
     re_warning = re.compile('WARNING: (.*)')
+    re_check = re.compile('CHECK: (.*)')
     re_file = re.compile('#\d+: FILE: ([^:]*):(\d+):')
 
-    for line in stdout.splitlines():
+    for line in result.stdout.splitlines():
         if verbose:
             print line
 
         # A blank line indicates the end of a message
         if not line and item:
-            problems.append(item)
+            result.problems.append(item)
             item = {}
-        match = re_stats.match(line)
+        match = re_stats_full.match(line)
+        if not match:
+            match = re_stats.match(line)
         if match:
-            error_count = int(match.group(1))
-            warning_count = int(match.group(2))
-            lines = int(match.group(3))
+            result.errors = int(match.group(1))
+            result.warnings = int(match.group(2))
+            if len(match.groups()) == 4:
+                result.checks = int(match.group(3))
+                result.lines = int(match.group(4))
+            else:
+                result.lines = int(match.group(3))
         elif re_ok.match(line):
-            result = True
+            result.ok = True
         elif re_bad.match(line):
-            result = False
-        match = re_error.match(line)
-        if match:
-            item['msg'] = match.group(1)
+            result.ok = False
+        err_match = re_error.match(line)
+        warn_match = re_warning.match(line)
+        file_match = re_file.match(line)
+        check_match = re_check.match(line)
+        if err_match:
+            item['msg'] = err_match.group(1)
             item['type'] = 'error'
-        match = re_warning.match(line)
-        if match:
-            item['msg'] = match.group(1)
+        elif warn_match:
+            item['msg'] = warn_match.group(1)
             item['type'] = 'warning'
-        match = re_file.match(line)
-        if match:
-            item['file'] = match.group(1)
-            item['line'] = int(match.group(2))
+        elif check_match:
+            item['msg'] = check_match.group(1)
+            item['type'] = 'check'
+        elif file_match:
+            item['file'] = file_match.group(1)
+            item['line'] = int(file_match.group(2))
 
-    return result, problems, error_count, warning_count, lines, stdout
+    return result
 
 def GetWarningMsg(col, msg_type, fname, line, msg):
     '''Create a message for a given file/line
@@ -128,37 +152,39 @@ def GetWarningMsg(col, msg_type, fname, line, msg):
         msg_type = col.Color(col.YELLOW, msg_type)
     elif msg_type == 'error':
         msg_type = col.Color(col.RED, msg_type)
+    elif msg_type == 'check':
+        msg_type = col.Color(col.MAGENTA, msg_type)
     return '%s: %s,%d: %s' % (msg_type, fname, line, msg)
 
 def CheckPatches(verbose, args):
     '''Run the checkpatch.pl script on each patch'''
-    error_count = 0
-    warning_count = 0
+    error_count, warning_count, check_count = 0, 0, 0
     col = terminal.Color()
 
     for fname in args:
-        ok, problems, errors, warnings, lines, stdout = CheckPatch(fname,
-                verbose)
-        if not ok:
-            error_count += errors
-            warning_count += warnings
-            print '%d errors, %d warnings for %s:' % (errors,
-                    warnings, fname)
-            if len(problems) != error_count + warning_count:
+        result = CheckPatch(fname, verbose)
+        if not result.ok:
+            error_count += result.errors
+            warning_count += result.warnings
+            check_count += result.checks
+            print '%d errors, %d warnings, %d checks for %s:' % (result.errors,
+                    result.warnings, result.checks, col.Color(col.BLUE, fname))
+            if (len(result.problems) != result.errors + result.warnings +
+                    result.checks):
                 print "Internal error: some problems lost"
-            for item in problems:
-                print GetWarningMsg(col, item['type'],
+            for item in result.problems:
+                print GetWarningMsg(col, item.get('type', '<unknown>'),
                         item.get('file', '<unknown>'),
-                        item.get('line', 0), item['msg'])
+                        item.get('line', 0), item.get('msg', 'message'))
+            print
             #print stdout
-    if error_count != 0 or warning_count != 0:
-        str = 'checkpatch.pl found %d error(s), %d warning(s)' % (
-            error_count, warning_count)
+    if error_count or warning_count or check_count:
+        str = 'checkpatch.pl found %d error(s), %d warning(s), %d checks(s)'
         color = col.GREEN
         if warning_count:
             color = col.YELLOW
         if error_count:
             color = col.RED
-        print col.Color(color, str)
+        print col.Color(color, str % (error_count, warning_count, check_count))
         return False
     return True
diff --git a/tools/patman/command.py b/tools/patman/command.py
index 4b00250..e6af6ed 100644
--- a/tools/patman/command.py
+++ b/tools/patman/command.py
@@ -20,53 +20,98 @@
 #
 
 import os
-import subprocess
+import cros_subprocess
 
 """Shell command ease-ups for Python."""
 
-def RunPipe(pipeline, infile=None, outfile=None,
-            capture=False, oneline=False, hide_stderr=False):
+class CommandResult:
+    """A class which captures the result of executing a command.
+
+    Members:
+        stdout: stdout obtained from command, as a string
+        stderr: stderr obtained from command, as a string
+        return_code: Return code from command
+        exception: Exception received, or None if all ok
+    """
+    def __init__(self):
+        self.stdout = None
+        self.stderr = None
+        self.return_code = None
+        self.exception = None
+
+
+def RunPipe(pipe_list, infile=None, outfile=None,
+            capture=False, capture_stderr=False, oneline=False,
+            raise_on_error=True, cwd=None, **kwargs):
     """
     Perform a command pipeline, with optional input/output filenames.
 
-    hide_stderr     Don't allow output of stderr (default False)
+    Args:
+        pipe_list: List of command lines to execute. Each command line is
+            piped into the next, and is itself a list of strings. For
+            example [ ['ls', '.git'] ['wc'] ] will pipe the output of
+            'ls .git' into 'wc'.
+        infile: File to provide stdin to the pipeline
+        outfile: File to store stdout
+        capture: True to capture output
+        capture_stderr: True to capture stderr
+        oneline: True to strip newline chars from output
+        kwargs: Additional keyword arguments to cros_subprocess.Popen()
+    Returns:
+        CommandResult object
     """
+    result = CommandResult()
     last_pipe = None
+    pipeline = list(pipe_list)
+    user_pipestr =  '|'.join([' '.join(pipe) for pipe in pipe_list])
     while pipeline:
         cmd = pipeline.pop(0)
-        kwargs = {}
         if last_pipe is not None:
             kwargs['stdin'] = last_pipe.stdout
         elif infile:
             kwargs['stdin'] = open(infile, 'rb')
         if pipeline or capture:
-            kwargs['stdout'] = subprocess.PIPE
+            kwargs['stdout'] = cros_subprocess.PIPE
         elif outfile:
             kwargs['stdout'] = open(outfile, 'wb')
-        if hide_stderr:
-            kwargs['stderr'] = open('/dev/null', 'wb')
+        if capture_stderr:
+            kwargs['stderr'] = cros_subprocess.PIPE
 
-        last_pipe = subprocess.Popen(cmd, **kwargs)
+        try:
+            last_pipe = cros_subprocess.Popen(cmd, cwd=cwd, **kwargs)
+        except Exception, err:
+            result.exception = err
+            if raise_on_error:
+                raise Exception("Error running '%s': %s" % (user_pipestr, str))
+            result.return_code = 255
+            return result
 
     if capture:
-        ret = last_pipe.communicate()[0]
-        if not ret:
-            return None
-        elif oneline:
-            return ret.rstrip('\r\n')
-        else:
-            return ret
+        result.stdout, result.stderr, result.combined = (
+                last_pipe.CommunicateFilter(None))
+        if result.stdout and oneline:
+            result.output = result.stdout.rstrip('\r\n')
+        result.return_code = last_pipe.wait()
     else:
-        return os.waitpid(last_pipe.pid, 0)[1] == 0
+        result.return_code = os.waitpid(last_pipe.pid, 0)[1]
+    if raise_on_error and result.return_code:
+        raise Exception("Error running '%s'" % user_pipestr)
+    return result
 
 def Output(*cmd):
-    return RunPipe([cmd], capture=True)
+    return RunPipe([cmd], capture=True, raise_on_error=False).stdout
 
-def OutputOneLine(*cmd):
-    return RunPipe([cmd], capture=True, oneline=True)
+def OutputOneLine(*cmd, **kwargs):
+    raise_on_error = kwargs.pop('raise_on_error', True)
+    return (RunPipe([cmd], capture=True, oneline=True,
+            raise_on_error=raise_on_error,
+            **kwargs).stdout.strip())
 
 def Run(*cmd, **kwargs):
-    return RunPipe([cmd], **kwargs)
+    return RunPipe([cmd], **kwargs).stdout
 
 def RunList(cmd):
-    return RunPipe([cmd], capture=True)
+    return RunPipe([cmd], capture=True).stdout
+
+def StopAll():
+    cros_subprocess.stay_alive = False
diff --git a/tools/patman/commit.py b/tools/patman/commit.py
index 7144e54..468b50c 100644
--- a/tools/patman/commit.py
+++ b/tools/patman/commit.py
@@ -22,7 +22,7 @@
 import re
 
 # Separates a tag: at the beginning of the subject from the rest of it
-re_subject_tag = re.compile('([^:]*):\s*(.*)')
+re_subject_tag = re.compile('([^:\s]*):\s*(.*)')
 
 class Commit:
     """Holds information about a single commit/patch in the series.
@@ -61,9 +61,10 @@ class Commit:
 
         Subject tags look like this:
 
-            propounder: Change the widget to propound correctly
+            propounder: fort: Change the widget to propound correctly
 
-        Multiple tags are supported. The list is updated in self.tag
+        Here the tags are propounder and fort. Multiple tags are supported.
+        The list is updated in self.tag.
 
         Returns:
             None if ok, else the name of a tag with no email alias
diff --git a/tools/patman/cros_subprocess.py b/tools/patman/cros_subprocess.py
new file mode 100644
index 0000000..0fc4a06
--- /dev/null
+++ b/tools/patman/cros_subprocess.py
@@ -0,0 +1,397 @@
+# Copyright (c) 2012 The Chromium OS Authors.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+#
+# Copyright (c) 2003-2005 by Peter Astrand <astrand@lysator.liu.se>
+# Licensed to PSF under a Contributor Agreement.
+# See http://www.python.org/2.4/license for licensing details.
+
+"""Subprocress execution
+
+This module holds a subclass of subprocess.Popen with our own required
+features, mainly that we get access to the subprocess output while it
+is running rather than just at the end. This makes it easiler to show
+progress information and filter output in real time.
+"""
+
+import errno
+import os
+import pty
+import select
+import subprocess
+import sys
+import unittest
+
+
+# Import these here so the caller does not need to import subprocess also.
+PIPE = subprocess.PIPE
+STDOUT = subprocess.STDOUT
+PIPE_PTY = -3     # Pipe output through a pty
+stay_alive = True
+
+
+class Popen(subprocess.Popen):
+    """Like subprocess.Popen with ptys and incremental output
+
+    This class deals with running a child process and filtering its output on
+    both stdout and stderr while it is running. We do this so we can monitor
+    progress, and possibly relay the output to the user if requested.
+
+    The class is similar to subprocess.Popen, the equivalent is something like:
+
+        Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+
+    But this class has many fewer features, and two enhancement:
+
+    1. Rather than getting the output data only at the end, this class sends it
+         to a provided operation as it arrives.
+    2. We use pseudo terminals so that the child will hopefully flush its output
+         to us as soon as it is produced, rather than waiting for the end of a
+         line.
+
+    Use CommunicateFilter() to handle output from the subprocess.
+
+    """
+
+    def __init__(self, args, stdin=None, stdout=PIPE_PTY, stderr=PIPE_PTY,
+                 shell=False, cwd=None, env=None, **kwargs):
+        """Cut-down constructor
+
+        Args:
+            args: Program and arguments for subprocess to execute.
+            stdin: See subprocess.Popen()
+            stdout: See subprocess.Popen(), except that we support the sentinel
+                    value of cros_subprocess.PIPE_PTY.
+            stderr: See subprocess.Popen(), except that we support the sentinel
+                    value of cros_subprocess.PIPE_PTY.
+            shell: See subprocess.Popen()
+            cwd: Working directory to change to for subprocess, or None if none.
+            env: Environment to use for this subprocess, or None to inherit parent.
+            kwargs: No other arguments are supported at the moment.    Passing other
+                    arguments will cause a ValueError to be raised.
+        """
+        stdout_pty = None
+        stderr_pty = None
+
+        if stdout == PIPE_PTY:
+            stdout_pty = pty.openpty()
+            stdout = os.fdopen(stdout_pty[1])
+        if stderr == PIPE_PTY:
+            stderr_pty = pty.openpty()
+            stderr = os.fdopen(stderr_pty[1])
+
+        super(Popen, self).__init__(args, stdin=stdin,
+                stdout=stdout, stderr=stderr, shell=shell, cwd=cwd, env=env,
+                **kwargs)
+
+        # If we're on a PTY, we passed the slave half of the PTY to the subprocess.
+        # We want to use the master half on our end from now on.    Setting this here
+        # does make some assumptions about the implementation of subprocess, but
+        # those assumptions are pretty minor.
+
+        # Note that if stderr is STDOUT, then self.stderr will be set to None by
+        # this constructor.
+        if stdout_pty is not None:
+            self.stdout = os.fdopen(stdout_pty[0])
+        if stderr_pty is not None:
+            self.stderr = os.fdopen(stderr_pty[0])
+
+        # Insist that unit tests exist for other arguments we don't support.
+        if kwargs:
+            raise ValueError("Unit tests do not test extra args - please add tests")
+
+    def CommunicateFilter(self, output):
+        """Interact with process: Read data from stdout and stderr.
+
+        This method runs until end-of-file is reached, then waits for the
+        subprocess to terminate.
+
+        The output function is sent all output from the subprocess and must be
+        defined like this:
+
+            def Output([self,] stream, data)
+            Args:
+                stream: the stream the output was received on, which will be
+                        sys.stdout or sys.stderr.
+                data: a string containing the data
+
+        Note: The data read is buffered in memory, so do not use this
+        method if the data size is large or unlimited.
+
+        Args:
+            output: Function to call with each fragment of output.
+
+        Returns:
+            A tuple (stdout, stderr, combined) which is the data received on
+            stdout, stderr and the combined data (interleaved stdout and stderr).
+
+            Note that the interleaved output will only be sensible if you have
+            set both stdout and stderr to PIPE or PIPE_PTY. Even then it depends on
+            the timing of the output in the subprocess. If a subprocess flips
+            between stdout and stderr quickly in succession, by the time we come to
+            read the output from each we may see several lines in each, and will read
+            all the stdout lines, then all the stderr lines. So the interleaving
+            may not be correct. In this case you might want to pass
+            stderr=cros_subprocess.STDOUT to the constructor.
+
+            This feature is still useful for subprocesses where stderr is
+            rarely used and indicates an error.
+
+            Note also that if you set stderr to STDOUT, then stderr will be empty
+            and the combined output will just be the same as stdout.
+        """
+
+        read_set = []
+        write_set = []
+        stdout = None # Return
+        stderr = None # Return
+
+        if self.stdin:
+            # Flush stdio buffer.    This might block, if the user has
+            # been writing to .stdin in an uncontrolled fashion.
+            self.stdin.flush()
+            if input:
+                write_set.append(self.stdin)
+            else:
+                self.stdin.close()
+        if self.stdout:
+            read_set.append(self.stdout)
+            stdout = []
+        if self.stderr and self.stderr != self.stdout:
+            read_set.append(self.stderr)
+            stderr = []
+        combined = []
+
+        input_offset = 0
+        while read_set or write_set:
+            try:
+                rlist, wlist, _ = select.select(read_set, write_set, [], 0.2)
+            except select.error, e:
+                if e.args[0] == errno.EINTR:
+                    continue
+                raise
+
+            if not stay_alive:
+                    self.terminate()
+
+            if self.stdin in wlist:
+                # When select has indicated that the file is writable,
+                # we can write up to PIPE_BUF bytes without risk
+                # blocking.    POSIX defines PIPE_BUF >= 512
+                chunk = input[input_offset : input_offset + 512]
+                bytes_written = os.write(self.stdin.fileno(), chunk)
+                input_offset += bytes_written
+                if input_offset >= len(input):
+                    self.stdin.close()
+                    write_set.remove(self.stdin)
+
+            if self.stdout in rlist:
+                data = ""
+                # We will get an error on read if the pty is closed
+                try:
+                    data = os.read(self.stdout.fileno(), 1024)
+                except OSError:
+                    pass
+                if data == "":
+                    self.stdout.close()
+                    read_set.remove(self.stdout)
+                else:
+                    stdout.append(data)
+                    combined.append(data)
+                    if output:
+                        output(sys.stdout, data)
+            if self.stderr in rlist:
+                data = ""
+                # We will get an error on read if the pty is closed
+                try:
+                    data = os.read(self.stderr.fileno(), 1024)
+                except OSError:
+                    pass
+                if data == "":
+                    self.stderr.close()
+                    read_set.remove(self.stderr)
+                else:
+                    stderr.append(data)
+                    combined.append(data)
+                    if output:
+                        output(sys.stderr, data)
+
+        # All data exchanged.    Translate lists into strings.
+        if stdout is not None:
+            stdout = ''.join(stdout)
+        else:
+            stdout = ''
+        if stderr is not None:
+            stderr = ''.join(stderr)
+        else:
+            stderr = ''
+        combined = ''.join(combined)
+
+        # Translate newlines, if requested.    We cannot let the file
+        # object do the translation: It is based on stdio, which is
+        # impossible to combine with select (unless forcing no
+        # buffering).
+        if self.universal_newlines and hasattr(file, 'newlines'):
+            if stdout:
+                stdout = self._translate_newlines(stdout)
+            if stderr:
+                stderr = self._translate_newlines(stderr)
+
+        self.wait()
+        return (stdout, stderr, combined)
+
+
+# Just being a unittest.TestCase gives us 14 public methods.    Unless we
+# disable this, we can only have 6 tests in a TestCase.    That's not enough.
+#
+# pylint: disable=R0904
+
+class TestSubprocess(unittest.TestCase):
+    """Our simple unit test for this module"""
+
+    class MyOperation:
+        """Provides a operation that we can pass to Popen"""
+        def __init__(self, input_to_send=None):
+            """Constructor to set up the operation and possible input.
+
+            Args:
+                input_to_send: a text string to send when we first get input. We will
+                    add \r\n to the string.
+            """
+            self.stdout_data = ''
+            self.stderr_data = ''
+            self.combined_data = ''
+            self.stdin_pipe = None
+            self._input_to_send = input_to_send
+            if input_to_send:
+                pipe = os.pipe()
+                self.stdin_read_pipe = pipe[0]
+                self._stdin_write_pipe = os.fdopen(pipe[1], 'w')
+
+        def Output(self, stream, data):
+            """Output handler for Popen. Stores the data for later comparison"""
+            if stream == sys.stdout:
+                self.stdout_data += data
+            if stream == sys.stderr:
+                self.stderr_data += data
+            self.combined_data += data
+
+            # Output the input string if we have one.
+            if self._input_to_send:
+                self._stdin_write_pipe.write(self._input_to_send + '\r\n')
+                self._stdin_write_pipe.flush()
+
+    def _BasicCheck(self, plist, oper):
+        """Basic checks that the output looks sane."""
+        self.assertEqual(plist[0], oper.stdout_data)
+        self.assertEqual(plist[1], oper.stderr_data)
+        self.assertEqual(plist[2], oper.combined_data)
+
+        # The total length of stdout and stderr should equal the combined length
+        self.assertEqual(len(plist[0]) + len(plist[1]), len(plist[2]))
+
+    def test_simple(self):
+        """Simple redirection: Get process list"""
+        oper = TestSubprocess.MyOperation()
+        plist = Popen(['ps']).CommunicateFilter(oper.Output)
+        self._BasicCheck(plist, oper)
+
+    def test_stderr(self):
+        """Check stdout and stderr"""
+        oper = TestSubprocess.MyOperation()
+        cmd = 'echo fred >/dev/stderr && false || echo bad'
+        plist = Popen([cmd], shell=True).CommunicateFilter(oper.Output)
+        self._BasicCheck(plist, oper)
+        self.assertEqual(plist [0], 'bad\r\n')
+        self.assertEqual(plist [1], 'fred\r\n')
+
+    def test_shell(self):
+        """Check with and without shell works"""
+        oper = TestSubprocess.MyOperation()
+        cmd = 'echo test >/dev/stderr'
+        self.assertRaises(OSError, Popen, [cmd], shell=False)
+        plist = Popen([cmd], shell=True).CommunicateFilter(oper.Output)
+        self._BasicCheck(plist, oper)
+        self.assertEqual(len(plist [0]), 0)
+        self.assertEqual(plist [1], 'test\r\n')
+
+    def test_list_args(self):
+        """Check with and without shell works using list arguments"""
+        oper = TestSubprocess.MyOperation()
+        cmd = ['echo', 'test', '>/dev/stderr']
+        plist = Popen(cmd, shell=False).CommunicateFilter(oper.Output)
+        self._BasicCheck(plist, oper)
+        self.assertEqual(plist [0], ' '.join(cmd[1:]) + '\r\n')
+        self.assertEqual(len(plist [1]), 0)
+
+        oper = TestSubprocess.MyOperation()
+
+        # this should be interpreted as 'echo' with the other args dropped
+        cmd = ['echo', 'test', '>/dev/stderr']
+        plist = Popen(cmd, shell=True).CommunicateFilter(oper.Output)
+        self._BasicCheck(plist, oper)
+        self.assertEqual(plist [0], '\r\n')
+
+    def test_cwd(self):
+        """Check we can change directory"""
+        for shell in (False, True):
+            oper = TestSubprocess.MyOperation()
+            plist = Popen('pwd', shell=shell, cwd='/tmp').CommunicateFilter(oper.Output)
+            self._BasicCheck(plist, oper)
+            self.assertEqual(plist [0], '/tmp\r\n')
+
+    def test_env(self):
+        """Check we can change environment"""
+        for add in (False, True):
+            oper = TestSubprocess.MyOperation()
+            env = os.environ
+            if add:
+                env ['FRED'] = 'fred'
+            cmd = 'echo $FRED'
+            plist = Popen(cmd, shell=True, env=env).CommunicateFilter(oper.Output)
+            self._BasicCheck(plist, oper)
+            self.assertEqual(plist [0], add and 'fred\r\n' or '\r\n')
+
+    def test_extra_args(self):
+        """Check we can't add extra arguments"""
+        self.assertRaises(ValueError, Popen, 'true', close_fds=False)
+
+    def test_basic_input(self):
+        """Check that incremental input works
+
+        We set up a subprocess which will prompt for name. When we see this prompt
+        we send the name as input to the process. It should then print the name
+        properly to stdout.
+        """
+        oper = TestSubprocess.MyOperation('Flash')
+        prompt = 'What is your name?: '
+        cmd = 'echo -n "%s"; read name; echo Hello $name' % prompt
+        plist = Popen([cmd], stdin=oper.stdin_read_pipe,
+                shell=True).CommunicateFilter(oper.Output)
+        self._BasicCheck(plist, oper)
+        self.assertEqual(len(plist [1]), 0)
+        self.assertEqual(plist [0], prompt + 'Hello Flash\r\r\n')
+
+    def test_isatty(self):
+        """Check that ptys appear as terminals to the subprocess"""
+        oper = TestSubprocess.MyOperation()
+        cmd = ('if [ -t %d ]; then echo "terminal %d" >&%d; '
+                'else echo "not %d" >&%d; fi;')
+        both_cmds = ''
+        for fd in (1, 2):
+            both_cmds += cmd % (fd, fd, fd, fd, fd)
+        plist = Popen(both_cmds, shell=True).CommunicateFilter(oper.Output)
+        self._BasicCheck(plist, oper)
+        self.assertEqual(plist [0], 'terminal 1\r\n')
+        self.assertEqual(plist [1], 'terminal 2\r\n')
+
+        # Now try with PIPE and make sure it is not a terminal
+        oper = TestSubprocess.MyOperation()
+        plist = Popen(both_cmds, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
+                shell=True).CommunicateFilter(oper.Output)
+        self._BasicCheck(plist, oper)
+        self.assertEqual(plist [0], 'not 1\n')
+        self.assertEqual(plist [1], 'not 2\n')
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/tools/patman/gitutil.py b/tools/patman/gitutil.py
index ca3ba4a..4e21d4c 100644
--- a/tools/patman/gitutil.py
+++ b/tools/patman/gitutil.py
@@ -23,11 +23,12 @@ import command
 import re
 import os
 import series
-import settings
 import subprocess
 import sys
 import terminal
 
+import settings
+
 
 def CountCommitsToBranch():
     """Returns number of commits between HEAD and the tracking branch.
@@ -40,10 +41,123 @@ def CountCommitsToBranch():
     """
     pipe = [['git', 'log', '--no-color', '--oneline', '@{upstream}..'],
             ['wc', '-l']]
-    stdout = command.RunPipe(pipe, capture=True, oneline=True)
+    stdout = command.RunPipe(pipe, capture=True, oneline=True).stdout
     patch_count = int(stdout)
     return patch_count
 
+def GetUpstream(git_dir, branch):
+    """Returns the name of the upstream for a branch
+
+    Args:
+        git_dir: Git directory containing repo
+        branch: Name of branch
+
+    Returns:
+        Name of upstream branch (e.g. 'upstream/master') or None if none
+    """
+    remote = command.OutputOneLine('git', '--git-dir', git_dir, 'config',
+            'branch.%s.remote' % branch)
+    merge = command.OutputOneLine('git', '--git-dir', git_dir, 'config',
+            'branch.%s.merge' % branch)
+    if remote == '.':
+        return merge
+    elif remote and merge:
+        leaf = merge.split('/')[-1]
+        return '%s/%s' % (remote, leaf)
+    else:
+        raise ValueError, ("Cannot determine upstream branch for branch "
+                "'%s' remote='%s', merge='%s'" % (branch, remote, merge))
+
+
+def GetRangeInBranch(git_dir, branch, include_upstream=False):
+    """Returns an expression for the commits in the given branch.
+
+    Args:
+        git_dir: Directory containing git repo
+        branch: Name of branch
+    Return:
+        Expression in the form 'upstream..branch' which can be used to
+        access the commits.
+    """
+    upstream = GetUpstream(git_dir, branch)
+    return '%s%s..%s' % (upstream, '~' if include_upstream else '', branch)
+
+def CountCommitsInBranch(git_dir, branch, include_upstream=False):
+    """Returns the number of commits in the given branch.
+
+    Args:
+        git_dir: Directory containing git repo
+        branch: Name of branch
+    Return:
+        Number of patches that exist on top of the branch
+    """
+    range_expr = GetRangeInBranch(git_dir, branch, include_upstream)
+    pipe = [['git', '--git-dir', git_dir, 'log', '--oneline', range_expr],
+            ['wc', '-l']]
+    result = command.RunPipe(pipe, capture=True, oneline=True)
+    patch_count = int(result.stdout)
+    return patch_count
+
+def CountCommits(commit_range):
+    """Returns the number of commits in the given range.
+
+    Args:
+        commit_range: Range of commits to count (e.g. 'HEAD..base')
+    Return:
+        Number of patches that exist on top of the branch
+    """
+    pipe = [['git', 'log', '--oneline', commit_range],
+            ['wc', '-l']]
+    stdout = command.RunPipe(pipe, capture=True, oneline=True).stdout
+    patch_count = int(stdout)
+    return patch_count
+
+def Checkout(commit_hash, git_dir=None, work_tree=None, force=False):
+    """Checkout the selected commit for this build
+
+    Args:
+        commit_hash: Commit hash to check out
+    """
+    pipe = ['git']
+    if git_dir:
+        pipe.extend(['--git-dir', git_dir])
+    if work_tree:
+        pipe.extend(['--work-tree', work_tree])
+    pipe.append('checkout')
+    if force:
+        pipe.append('-f')
+    pipe.append(commit_hash)
+    result = command.RunPipe([pipe], capture=True, raise_on_error=False)
+    if result.return_code != 0:
+        raise OSError, 'git checkout (%s): %s' % (pipe, result.stderr)
+
+def Clone(git_dir, output_dir):
+    """Checkout the selected commit for this build
+
+    Args:
+        commit_hash: Commit hash to check out
+    """
+    pipe = ['git', 'clone', git_dir, '.']
+    result = command.RunPipe([pipe], capture=True, cwd=output_dir)
+    if result.return_code != 0:
+        raise OSError, 'git clone: %s' % result.stderr
+
+def Fetch(git_dir=None, work_tree=None):
+    """Fetch from the origin repo
+
+    Args:
+        commit_hash: Commit hash to check out
+    """
+    pipe = ['git']
+    if git_dir:
+        pipe.extend(['--git-dir', git_dir])
+    if work_tree:
+        pipe.extend(['--work-tree', work_tree])
+    pipe.append('fetch')
+    result = command.RunPipe([pipe], capture=True)
+    if result.return_code != 0:
+        raise OSError, 'git fetch: %s' % result.stderr
+
 def CreatePatches(start, count, series):
     """Create a series of patches from the top of the current branch.
 
@@ -203,7 +317,7 @@ def BuildEmailList(in_list, tag=None, alias=None):
     return result
 
 def EmailPatches(series, cover_fname, args, dry_run, cc_fname,
-        self_only=False, alias=None):
+        self_only=False, alias=None, in_reply_to=None):
     """Email a patch series.
 
     Args:
@@ -213,6 +327,8 @@ def EmailPatches(series, cover_fname, args, dry_run, cc_fname,
         dry_run: Just return the command that would be run
         cc_fname: Filename of Cc file for per-commit Cc
         self_only: True to just email to yourself as a test
+        in_reply_to: If set we'll pass this to git as --in-reply-to.
+            Should be a message ID that this is in reply to.
 
     Returns:
         Git command that was/would be run
@@ -262,6 +378,9 @@ def EmailPatches(series, cover_fname, args, dry_run, cc_fname,
         to = BuildEmailList([os.getenv('USER')], '--to', alias)
         cc = []
     cmd = ['git', 'send-email', '--annotate']
+    if in_reply_to:
+        cmd.append('--in-reply-to="%s"' % in_reply_to)
+
     cmd += to
     cmd += cc
     cmd += ['--cc-cmd', '"%s --cc-cmd %s"' % (sys.argv[0], cc_fname)]
@@ -359,7 +478,8 @@ def GetAliasFile():
     Returns:
         Filename of git alias file, or None if none
     """
-    fname = command.OutputOneLine('git', 'config', 'sendemail.aliasesfile')
+    fname = command.OutputOneLine('git', 'config', 'sendemail.aliasesfile',
+            raise_on_error=False)
     if fname:
         fname = os.path.join(GetTopLevel(), fname.strip())
     return fname
@@ -389,6 +509,14 @@ def Setup():
     if alias_fname:
         settings.ReadGitAliases(alias_fname)
 
+def GetHead():
+    """Get the hash of the current HEAD
+
+    Returns:
+        Hash of HEAD
+    """
+    return command.OutputOneLine('git', 'show', '-s', '--pretty=format:%H')
+
 if __name__ == "__main__":
     import doctest
 
diff --git a/tools/patman/patchstream.py b/tools/patman/patchstream.py
index f7ee75a..4fda852 100644
--- a/tools/patman/patchstream.py
+++ b/tools/patman/patchstream.py
@@ -31,7 +31,7 @@ from series import Series
 
 # Tags that we detect and remove
 re_remove = re.compile('^BUG=|^TEST=|^BRANCH=|^Change-Id:|^Review URL:'
-    '|Reviewed-on:|Reviewed-by:|Commit-Ready:')
+    '|Reviewed-on:|Commit-\w*:')
 
 # Lines which are allowed after a TEST= line
 re_allowed_after_test = re.compile('^Signed-off-by:')
@@ -42,11 +42,14 @@ re_signoff = re.compile('^Signed-off-by:')
 # The start of the cover letter
 re_cover = re.compile('^Cover-letter:')
 
+# A cover letter Cc
+re_cover_cc = re.compile('^Cover-letter-cc: *(.*)')
+
 # Patch series tag
 re_series = re.compile('^Series-(\w*): *(.*)')
 
 # Commit tags that we want to collect and keep
-re_tag = re.compile('^(Tested-by|Acked-by|Cc): (.*)')
+re_tag = re.compile('^(Tested-by|Acked-by|Reviewed-by|Cc): (.*)')
 
 # The start of a new commit in the git log
 re_commit = re.compile('^commit (.*)')
@@ -153,6 +156,7 @@ class PatchStream:
         # Handle state transition and skipping blank lines
         series_match = re_series.match(line)
         commit_match = re_commit.match(line) if self.is_log else None
+        cover_cc_match = re_cover_cc.match(line)
         tag_match = None
         if self.state == STATE_PATCH_HEADER:
             tag_match = re_tag.match(line)
@@ -205,6 +209,10 @@ class PatchStream:
             self.in_section = 'cover'
             self.skip_blank = False
 
+        elif cover_cc_match:
+            value = cover_cc_match.group(1)
+            self.AddToSeries(line, 'cover-cc', value)
+
         # If we are in a change list, key collected lines until a blank one
         elif self.in_change:
             if is_blank:
@@ -237,7 +245,8 @@ class PatchStream:
         # Detect the start of a new commit
         elif commit_match:
             self.CloseCommit()
-            self.commit = commit.Commit(commit_match.group(1)[:7])
+            # TODO: We should store the whole hash, and just display a subset
+            self.commit = commit.Commit(commit_match.group(1)[:8])
 
         # Detect tags in the commit message
         elif tag_match:
@@ -334,26 +343,47 @@ class PatchStream:
         self.Finalize()
 
 
-def GetMetaData(start, count):
+def GetMetaDataForList(commit_range, git_dir=None, count=None,
+                       series = Series()):
     """Reads out patch series metadata from the commits
 
     This does a 'git log' on the relevant commits and pulls out the tags we
     are interested in.
 
     Args:
-        start: Commit to start from: 0=HEAD, 1=next one, etc.
-        count: Number of commits to list
+        commit_range: Range of commits to count (e.g. 'HEAD..base')
+        git_dir: Path to git repositiory (None to use default)
+        count: Number of commits to list, or None for no limit
+        series: Series object to add information into. By default a new series
+            is started.
+    Returns:
+        A Series object containing information about the commits.
     """
-    pipe = [['git', 'log', '--no-color', '--reverse', 'HEAD~%d' % start,
-	'-n%d' % count]]
-    stdout = command.RunPipe(pipe, capture=True)
-    series = Series()
+    params = ['git', 'log', '--no-color', '--reverse', commit_range]
+    if count is not None:
+        params[2:2] = ['-n%d' % count]
+    if git_dir:
+        params[1:1] = ['--git-dir', git_dir]
+    pipe = [params]
+    stdout = command.RunPipe(pipe, capture=True).stdout
     ps = PatchStream(series, is_log=True)
     for line in stdout.splitlines():
         ps.ProcessLine(line)
     ps.Finalize()
     return series
 
+def GetMetaData(start, count):
+    """Reads out patch series metadata from the commits
+
+    This does a 'git log' on the relevant commits and pulls out the tags we
+    are interested in.
+
+    Args:
+        start: Commit to start from: 0=HEAD, 1=next one, etc.
+        count: Number of commits to list
+    """
+    return GetMetaDataForList('HEAD~%d' % start, None, count)
+
 def FixPatch(backup_dir, fname, series, commit):
     """Fix up a patch file, by adding/removing as required.
 
diff --git a/tools/patman/patman.py b/tools/patman/patman.py
index e049081..5000b7d 100755
--- a/tools/patman/patman.py
+++ b/tools/patman/patman.py
@@ -49,10 +49,12 @@ parser.add_option('-i', '--ignore-errors', action='store_true',
        dest='ignore_errors', default=False,
        help='Send patches email even if patch errors are found')
 parser.add_option('-n', '--dry-run', action='store_true', dest='dry_run',
-       default=False, help="Do a try run (create but don't email patches)")
+       default=False, help="Do a dry run (create but don't email patches)")
 parser.add_option('-p', '--project', default=project.DetectProject(),
                   help="Project name; affects default option values and "
                   "aliases [default: %default]")
+parser.add_option('-r', '--in-reply-to', type='string', action='store',
+                  help="Message ID that this series is in reply to")
 parser.add_option('-s', '--start', dest='start', type='int',
        default=0, help='Commit to start creating patches from (0 = HEAD)')
 parser.add_option('-t', '--test', action='store_true', dest='test',
@@ -70,7 +72,7 @@ parser.add_option('--no-tags', action='store_false', dest='process_tags',
 parser.usage = """patman [options]
 
 Create patches from commits in a branch, check them and email them as
-specified by tags you place in the commits. Use -n to """
+specified by tags you place in the commits. Use -n to do a dry run first."""
 
 
 # Parse options twice: first to get the project and second to handle
@@ -163,7 +165,7 @@ else:
     cmd = ''
     if ok or options.ignore_errors:
         cmd = gitutil.EmailPatches(series, cover_fname, args,
-                options.dry_run, cc_file)
+                options.dry_run, cc_file, in_reply_to=options.in_reply_to)
 
     # For a dry run, just show our actions as a sanity check
     if options.dry_run:
diff --git a/tools/patman/series.py b/tools/patman/series.py
index 6c5c570..44ad931 100644
--- a/tools/patman/series.py
+++ b/tools/patman/series.py
@@ -27,7 +27,8 @@ import gitutil
 import terminal
 
 # Series-xxx tags that we understand
-valid_series = ['to', 'cc', 'version', 'changes', 'prefix', 'notes', 'name'];
+valid_series = ['to', 'cc', 'version', 'changes', 'prefix', 'notes', 'name',
+                'cover-cc']
 
 class Series(dict):
     """Holds information about a patch series, including all tags.
@@ -43,6 +44,7 @@ class Series(dict):
     def __init__(self):
         self.cc = []
         self.to = []
+        self.cover_cc = []
         self.commits = []
         self.cover = None
         self.notes = []
@@ -69,6 +71,7 @@ class Series(dict):
             value: Tag value (part after 'Series-xxx: ')
         """
         # If we already have it, then add to our list
+        name = name.replace('-', '_')
         if name in self:
             values = value.split(',')
             values = [str.strip() for str in values]
@@ -140,7 +143,8 @@ class Series(dict):
         print 'Prefix:\t ', self.get('prefix')
         if self.cover:
             print 'Cover: %d lines' % len(self.cover)
-            all_ccs = itertools.chain(*self._generated_cc.values())
+            cover_cc = gitutil.BuildEmailList(self.get('cover_cc', ''))
+            all_ccs = itertools.chain(cover_cc, *self._generated_cc.values())
             for email in set(all_ccs):
                     print '      Cc: ',email
         if cmd:
@@ -232,7 +236,8 @@ class Series(dict):
             self._generated_cc[commit.patch] = list
 
         if cover_fname:
-            print >>fd, cover_fname, ', '.join(set(all_ccs))
+            cover_cc = gitutil.BuildEmailList(self.get('cover_cc', ''))
+            print >>fd, cover_fname, ', '.join(set(cover_cc + all_ccs))
 
         fd.close()
         return fname
diff --git a/tools/patman/terminal.py b/tools/patman/terminal.py
index 838c828..337a2a4 100644
--- a/tools/patman/terminal.py
+++ b/tools/patman/terminal.py
@@ -24,24 +24,32 @@
 This module handles terminal interaction including ANSI color codes.
 """
 
+import os
+import sys
+
+# Selection of when we want our output to be colored
+COLOR_IF_TERMINAL, COLOR_ALWAYS, COLOR_NEVER = range(3)
+
 class Color(object):
   """Conditionally wraps text in ANSI color escape sequences."""
   BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = range(8)
   BOLD = -1
-  COLOR_START = '\033[1;%dm'
+  BRIGHT_START = '\033[1;%dm'
+  NORMAL_START = '\033[22;%dm'
   BOLD_START = '\033[1m'
   RESET = '\033[0m'
 
-  def __init__(self, enabled=True):
+  def __init__(self, colored=COLOR_IF_TERMINAL):
     """Create a new Color object, optionally disabling color output.
 
     Args:
       enabled: True if color output should be enabled. If False then this
         class will not add color codes at all.
     """
-    self._enabled = enabled
+    self._enabled = (colored == COLOR_ALWAYS or
+        (colored == COLOR_IF_TERMINAL and os.isatty(sys.stdout.fileno())))
 
-  def Start(self, color):
+  def Start(self, color, bright=True):
     """Returns a start color code.
 
     Args:
@@ -52,7 +60,8 @@ class Color(object):
       otherwise returns empty string
     """
     if self._enabled:
-      return self.COLOR_START % (color + 30)
+        base = self.BRIGHT_START if bright else self.NORMAL_START
+        return base % (color + 30)
     return ''
 
   def Stop(self):
@@ -63,10 +72,10 @@ class Color(object):
       returns empty string
     """
     if self._enabled:
-      return self.RESET
+        return self.RESET
     return ''
 
-  def Color(self, color, text):
+  def Color(self, color, text, bright=True):
     """Returns text with conditionally added color escape sequences.
 
     Keyword arguments:
@@ -78,9 +87,10 @@ class Color(object):
       returns text with color escape sequences based on the value of color.
     """
     if not self._enabled:
-      return text
+        return text
     if color == self.BOLD:
-      start = self.BOLD_START
+        start = self.BOLD_START
     else:
-      start = self.COLOR_START % (color + 30)
+        base = self.BRIGHT_START if bright else self.NORMAL_START
+        start = base % (color + 30)
     return start + text + self.RESET
diff --git a/tools/patman/test.py b/tools/patman/test.py
index f801ced..8cd2647 100644
--- a/tools/patman/test.py
+++ b/tools/patman/test.py
@@ -190,6 +190,11 @@ index 0000000..2234c87
 +		rec->time_us = (uint32_t)timer_get_us();
 +		rec->name = name;
 +	}
++	if (!rec->name &&
++	%ssomething_else) {
++		rec->time_us = (uint32_t)timer_get_us();
++		rec->name = name;
++	}
 +%sreturn rec->time_us;
 +}
 --
@@ -197,15 +202,18 @@ index 0000000..2234c87
 '''
         signoff = 'Signed-off-by: Simon Glass <sjg@chromium.org>\n'
         tab = '	'
+        indent = '    '
         if data_type == 'good':
             pass
         elif data_type == 'no-signoff':
             signoff = ''
         elif data_type == 'spaces':
             tab = '   '
+        elif data_type == 'indent':
+            indent = tab
         else:
             print 'not implemented'
-        return data % (signoff, tab, tab)
+        return data % (signoff, tab, indent, tab)
 
     def SetupData(self, data_type):
         inhandle, inname = tempfile.mkstemp()
@@ -215,33 +223,49 @@ index 0000000..2234c87
         infd.close()
         return inname
 
-    def testCheckpatch(self):
+    def testGood(self):
         """Test checkpatch operation"""
         inf = self.SetupData('good')
-        result, problems, err, warn, lines, stdout = checkpatch.CheckPatch(inf)
-        self.assertEqual(result, True)
-        self.assertEqual(problems, [])
-        self.assertEqual(err, 0)
-        self.assertEqual(warn, 0)
-        self.assertEqual(lines, 67)
+        result = checkpatch.CheckPatch(inf)
+        self.assertEqual(result.ok, True)
+        self.assertEqual(result.problems, [])
+        self.assertEqual(result.errors, 0)
+        self.assertEqual(result.warnings, 0)
+        self.assertEqual(result.checks, 0)
+        self.assertEqual(result.lines, 67)
         os.remove(inf)
 
+    def testNoSignoff(self):
         inf = self.SetupData('no-signoff')
-        result, problems, err, warn, lines, stdout = checkpatch.CheckPatch(inf)
-        self.assertEqual(result, False)
-        self.assertEqual(len(problems), 1)
-        self.assertEqual(err, 1)
-        self.assertEqual(warn, 0)
-        self.assertEqual(lines, 67)
+        result = checkpatch.CheckPatch(inf)
+        self.assertEqual(result.ok, False)
+        self.assertEqual(len(result.problems), 1)
+        self.assertEqual(result.errors, 1)
+        self.assertEqual(result.warnings, 0)
+        self.assertEqual(result.checks, 0)
+        self.assertEqual(result.lines, 67)
         os.remove(inf)
 
+    def testSpaces(self):
         inf = self.SetupData('spaces')
-        result, problems, err, warn, lines, stdout = checkpatch.CheckPatch(inf)
-        self.assertEqual(result, False)
-        self.assertEqual(len(problems), 2)
-        self.assertEqual(err, 0)
-        self.assertEqual(warn, 2)
-        self.assertEqual(lines, 67)
+        result = checkpatch.CheckPatch(inf)
+        self.assertEqual(result.ok, False)
+        self.assertEqual(len(result.problems), 1)
+        self.assertEqual(result.errors, 0)
+        self.assertEqual(result.warnings, 1)
+        self.assertEqual(result.checks, 0)
+        self.assertEqual(result.lines, 67)
+        os.remove(inf)
+
+    def testIndent(self):
+        inf = self.SetupData('indent')
+        result = checkpatch.CheckPatch(inf)
+        self.assertEqual(result.ok, False)
+        self.assertEqual(len(result.problems), 1)
+        self.assertEqual(result.errors, 0)
+        self.assertEqual(result.warnings, 0)
+        self.assertEqual(result.checks, 1)
+        self.assertEqual(result.lines, 67)
         os.remove(inf)