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authorTom Rini <trini@ti.com>2013-08-21 16:27:47 -0400
committerTom Rini <trini@ti.com>2013-08-21 16:27:47 -0400
commit6612ab33956ae09c5ba2fde9c1540b519625ba37 (patch)
treeb6da2e20793336cf0eed44292edb3b5e7ce88819 /doc
parent3fb858891273945ce2238e6d4dac3363a1fb0853 (diff)
parentb6df9b01fb8c126b212aba92b6523407d3fa60a5 (diff)
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Merge branch 'master' of git://git.denx.de/u-boot-mpc85xx
Diffstat (limited to 'doc')
-rw-r--r--doc/README.TPL45
-rw-r--r--doc/README.mpc85xx-sd-spi-boot81
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diff --git a/doc/README.TPL b/doc/README.TPL
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+Generic TPL framework
+=====================
+
+Overview
+--------
+
+TPL---Third Program Loader.
+
+Due to the SPL on some boards(powerpc mpc85xx) has a size limit and cannot
+be compatible with all the external device(e.g. DDR). So add a tertiary
+program loader (TPL) to enable a loader stub loaded by the code from the
+SPL. It loads the final uboot image into DDR, then jump to it to begin
+execution. Now, only the powerpc mpc85xx has this requirement and will
+implemente it.
+
+Keep consistent with SPL, with this framework almost all source files for a
+board can be reused. No code duplication or symlinking is necessary anymore.
+
+How it works
+------------
+
+There has been a directory TOPDIR/spl which contains only a Makefile. The
+Makefile is shared by SPL and TPL.
+
+The object files are built separately for SPL/TPL and placed in the
+directory spl/tpl. The final binaries which are generated are
+u-boot-{spl|tpl}, u-boot-{spl|tpl}.bin and u-boot-{spl|tpl}.map.
+
+During the TPL build a variable named CONFIG_TPL_BUILD is exported in the
+make environment and also appended to CPPFLAGS with -DCONFIG_TPL_BUILD.
+
+The SPL options are shared by SPL and TPL, the board config file should
+determine which SPL options to choose based on whether CONFIG_TPL_BUILD
+is set. Source files can be compiled for TPL with options choosed in the
+board config file.
+
+For example:
+
+spl/Makefile:
+LIBS-$(CONFIG_SPL_LIBCOMMON_SUPPORT) += common/libcommon.o
+
+CONFIG_SPL_LIBCOMMON_SUPPORT is defined in board config file:
+#ifdef CONFIG_TPL_BUILD
+#define CONFIG_SPL_LIBCOMMON_SUPPORT
+#endif
diff --git a/doc/README.mpc85xx-sd-spi-boot b/doc/README.mpc85xx-sd-spi-boot
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+----------------------------------------
+Booting from On-Chip ROM (eSDHC or eSPI)
+----------------------------------------
+
+boot_format is a tool to write SD bootable images to a filesystem and build
+SD/SPI images to a binary file for writing later.
+
+When booting from an SD card/MMC, boot_format puts the configuration file and
+the RAM-based U-Boot image on the card.
+When booting from an EEPROM, boot_format generates a binary image that is used
+to boot from this EEPROM.
+
+Where to get boot_format:
+========================
+
+you can browse it online at:
+http://git.freescale.com/git/cgit.cgi/ppc/sdk/boot-format.git/
+
+Building
+========
+
+Run the following to build this project
+
+ $ make
+
+Execution
+=========
+
+boot_format runs under a regular Linux machine and requires a super user mode
+to run. Execute boot_format as follows.
+
+For building SD images by writing directly to a file system on SD media:
+
+ $ boot_format $config u-boot.bin -sd $device
+
+Where $config is the included config.dat file for your platform and $device
+is the target block device for the SD media on your computer.
+
+For build binary images directly a local file:
+
+ $ boot_format $config u-boot.bin -spi $file
+
+Where $file is the target file. Also keep in mind the u-boot.bin file needs
+to be the u-boot built for your particular platform and target media.
+
+Example: To generate a u-boot.bin for a P1022DS booting from SD, run the
+following in the u-boot repository:
+
+ $ make P1022DS_SDCARD
+
+Configuration Files
+===================
+
+Below are the configuration files to be used with a particular platform. Keep
+in mind that some of these config files are tied to the platforms DDR speed.
+Please see the SoC reference manual for more documentation.
+
+P1022DS config_sram_p1022ds.dat
+P2020DS config_sram_p2020ds.dat
+P2010DS config_sram_p2020ds.dat
+P1020RDB config_ddr2_1g_p1020rdb_533M.dat
+P1020RDB config_ddr2_1g_p1020rdb_667M.dat
+P2020RDB config_ddr2_1g_p2020rdb_800M.dat
+P2020RDB config_ddr2_1g_p2020rdb_667M.dat
+P2020RDB config_ddr3_1gb_64bit_p2020rdb_pc.dat
+P2010RDB config_ddr3_1gb_64bit_p2020rdb_pc.dat
+P1020RDB config_ddr3_1gb_p1_p2_rdb_pc_800M.dat
+P1011RDB config_ddr3_1gb_p1_p2_rdb_pc_800M.dat
+P1010RDB config_ddr3_1gb_p1010rdb_800M.dat
+P1014RDB config_ddr3_1gb_p1014rdb_800M.dat
+P1021RDB config_ddr3_1gb_p1_p2_rdb_pc_800M.dat
+P1012RDB config_ddr3_1gb_p1_p2_rdb_pc_800M.dat
+P1022DS config_ddr3_2gb_p1022ds.dat
+P1013DS config_ddr3_2gb_p1022ds.dat
+P1024RDB config_ddr3_1gb_p1_p2_rdb_pc_667M.dat
+P1013RDB config_ddr3_1gb_p1_p2_rdb_pc_667M.dat
+P1025RDB config_ddr3_1gb_p1_p2_rdb_pc_667M.dat
+P1016RDB config_ddr3_1gb_p1_p2_rdb_pc_667M.dat
+P1020UTM config_ddr3_1gb_p1_p2_rdb_pc_800M.dat
+P1020MBG config_ddr3_1gb_p1_p2_rdb_pc_800M.dat
+MPC8536DS config_ddr2_512m_mpc8536ds_667M.dat