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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / f957576cb53e6cfab412709cfc8db1afd39d21c3 / . / doc / README-i386
blob: 02b753cbd7f48db79a9663ba8e86abb14d3cd7cb [file] [log] [blame]
wdenk3bac3512003-03-12 10:41:04 +0000[diff] [blame]1This is my attempt to port U-Boot to the i386 platform. This
wdenk2262cfe2002-11-18 00:14:45 +0000[diff] [blame]2work was sponsored by my emplyer, Omicron Ceti AB. http://www.omicron.se
3
4It is currently capable of booting a linux bzImage from flash on
5the AMD SC520 CDP platform.
6
wdenk8bde7f72003-06-27 21:31:46 +0000[diff] [blame]7It was originally based on PPCBoot taken from the CVS October 28 2002.
wdenk2262cfe2002-11-18 00:14:45 +0000[diff] [blame]8
9To compile:
10
111) Unpack the source tree, either from the complete tarball or
12 from the virgin snapshot + the patch
wdenk8bde7f72003-06-27 21:31:46 +0000[diff] [blame]13
wdenk2262cfe2002-11-18 00:14:45 +0000[diff] [blame]142) Configure the source
15 $ make sc520_cdp_comfig
16 $ make
wdenk8bde7f72003-06-27 21:31:46 +0000[diff] [blame]17
wdenk2262cfe2002-11-18 00:14:45 +0000[diff] [blame]18To use this code on the CDP:
191) Make a suitable kernel, I used 2.4.19 with the mtd-support updated
20 from the MTD CVS and a patch to allow root=/dev/mtdblock1 which I
wdenk8bde7f72003-06-27 21:31:46 +0000[diff] [blame]21 included at the end of this file.
wdenk2262cfe2002-11-18 00:14:45 +0000[diff] [blame]22 The following options in the MTD section might be useful:
wdenk8bde7f72003-06-27 21:31:46 +0000[diff] [blame]23
wdenk2262cfe2002-11-18 00:14:45 +0000[diff] [blame]24 CONFIG_MTD_PHYSMAP=y
25 CONFIG_MTD_PHYSMAP_START=38100000
26 CONFIG_MTD_PHYSMAP_LEN=7a0000
27 CONFIG_MTD_PHYSMAP_BUSWIDTH=2
28
29
302) Program it in to the CDP flashbank with remon
wdenk3bac3512003-03-12 10:41:04 +0000[diff] [blame]31 u-boot.bin should be programmed att offset 0x7e000 and the kernel at
wdenk8bde7f72003-06-27 21:31:46 +0000[diff] [blame]32 offset 0. If you want to use a jffs2 root file system (not included here),
wdenk2262cfe2002-11-18 00:14:45 +0000[diff] [blame]33 it should be programmed to offset 0x100000.
wdenk8bde7f72003-06-27 21:31:46 +0000[diff] [blame]34
wdenk2262cfe2002-11-18 00:14:45 +0000[diff] [blame]35 remon> z
36 remon> yi
wdenk3bac3512003-03-12 10:41:04 +0000[diff] [blame]37 remon> ns u-boot.bin 7e0000
wdenk2262cfe2002-11-18 00:14:45 +0000[diff] [blame]38 remon> ns bzImage 0
39 remon> ns image.jffs2 100000
40
413) Connect a terminal to the 25pin serial port at 9600bps, and start the CDP.
wdenk8bde7f72003-06-27 21:31:46 +0000[diff] [blame]42
wdenk2262cfe2002-11-18 00:14:45 +0000[diff] [blame]43 remon> z
44 remon> g
45
wdenk3bac3512003-03-12 10:41:04 +0000[diff] [blame]464) U-Boot should output some message and a prompt on the terminal, to
wdenk2262cfe2002-11-18 00:14:45 +0000[diff] [blame]47 start the kernel issue the following command:
wdenk8bde7f72003-06-27 21:31:46 +0000[diff] [blame]48
wdenk2262cfe2002-11-18 00:14:45 +0000[diff] [blame]49 BOOT> bootm
wdenk8bde7f72003-06-27 21:31:46 +0000[diff] [blame]50
wdenk2262cfe2002-11-18 00:14:45 +0000[diff] [blame]515) The kernel should boot, and mount the root filesystem if present.
52
53We hope you find this stuff useful
54Daniel Engstrรถm, Omicron Ceti AB, daniel@omicron.se
55
56
wdenk2262cfe2002-11-18 00:14:45 +0000[diff] [blame]57--- linux-2.4.19-orig/init/do_mounts.c Sat Aug 3 02:39:46 2002
58+++ linux-2.4.19/init/do_mounts.c Mon Sep 23 16:21:33 2002
59@@ -224,6 +224,14 @@
60 { "ftlc", 0x2c10 },
61 { "ftld", 0x2c18 },
62 { "mtdblock", 0x1f00 },
63+ { "mtdblock0", 0x1f00 },
64+ { "mtdblock1", 0x1f01 },
65+ { "mtdblock2", 0x1f02 },
66+ { "mtdblock3", 0x1f03 },
67+ { "mtdblock4", 0x1f04 },
68+ { "mtdblock5", 0x1f05 },
69+ { "mtdblock6", 0x1f06 },
70+ { "mtdblock7", 0x1f07 },
71 { NULL, 0 }
72 };
wdenk8bde7f72003-06-27 21:31:46 +0000[diff] [blame]73
74-------------------