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authorwdenk <wdenk>2002-11-18 00:14:45 +0000
committerwdenk <wdenk>2002-11-18 00:14:45 +0000
commit2262cfeef91458b01a1bfe3812ccbbfdf8b82807 (patch)
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parent1d0350ed0b1b0f63e3fb5db6b19397b84a2ea1c7 (diff)
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* Patch by Daniel Engström, 13 Nov 2002:
Add support for i386 architecture and AMD SC520 board * Patch by Pierre Aubert, 12 Nov 2002: Add support for DOS filesystem and booting from DOS floppy disk
Diffstat (limited to 'doc/README-i386')
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+This is my attempt to port PPCBoot to the i386 platform. This
+work was sponsored by my emplyer, Omicron Ceti AB. http://www.omicron.se
+
+It is currently capable of booting a linux bzImage from flash on
+the AMD SC520 CDP platform.
+
+It was originally based on PPCBoot taken from the CVS October 28 2002.
+
+To compile:
+
+1) Unpack the source tree, either from the complete tarball or
+ from the virgin snapshot + the patch
+
+2) Configure the source
+ $ make sc520_cdp_comfig
+ $ make
+
+To use this code on the CDP:
+1) Make a suitable kernel, I used 2.4.19 with the mtd-support updated
+ from the MTD CVS and a patch to allow root=/dev/mtdblock1 which I
+ included at the end of this file.
+ The following options in the MTD section might be useful:
+
+ CONFIG_MTD_PHYSMAP=y
+ CONFIG_MTD_PHYSMAP_START=38100000
+ CONFIG_MTD_PHYSMAP_LEN=7a0000
+ CONFIG_MTD_PHYSMAP_BUSWIDTH=2
+
+
+2) Program it in to the CDP flashbank with remon
+ ppcboot.bin should be programmed att offset 0x7e000 and the kernel at
+ offset 0. If you want to use a jffs2 root file system (not included here),
+ it should be programmed to offset 0x100000.
+
+ remon> z
+ remon> yi
+ remon> ns ppcboot.bin 7e0000
+ remon> ns bzImage 0
+ remon> ns image.jffs2 100000
+
+3) Connect a terminal to the 25pin serial port at 9600bps, and start the CDP.
+
+ remon> z
+ remon> g
+
+4) PPCboot should output some message and a prompt on the terminal, to
+ start the kernel issue the following command:
+
+ BOOT> bootm
+
+5) The kernel should boot, and mount the root filesystem if present.
+
+We hope you find this stuff useful
+Daniel Engström, Omicron Ceti AB, daniel@omicron.se
+
+
+
+--- linux-2.4.19-orig/init/do_mounts.c Sat Aug 3 02:39:46 2002
++++ linux-2.4.19/init/do_mounts.c Mon Sep 23 16:21:33 2002
+@@ -224,6 +224,14 @@
+ { "ftlc", 0x2c10 },
+ { "ftld", 0x2c18 },
+ { "mtdblock", 0x1f00 },
++ { "mtdblock0", 0x1f00 },
++ { "mtdblock1", 0x1f01 },
++ { "mtdblock2", 0x1f02 },
++ { "mtdblock3", 0x1f03 },
++ { "mtdblock4", 0x1f04 },
++ { "mtdblock5", 0x1f05 },
++ { "mtdblock6", 0x1f06 },
++ { "mtdblock7", 0x1f07 },
+ { NULL, 0 }
+ };
+