1 This is my attempt to port U-Boot to the x86 platform. This
2 work was sponsored by my emplyer, Omicron Ceti AB. http://www.omicron.se
4 It is currently capable of booting a linux bzImage from flash on
5 the AMD SC520 CDP platform.
7 It was originally based on PPCBoot taken from the CVS October 28 2002.
11 1) Unpack the source tree, either from the complete tarball or
12 from the virgin snapshot + the patch
14 2) Configure the source
15 $ make sc520_cdp_comfig
18 To use this code on the CDP:
19 1) 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
21 included at the end of this file.
22 The following options in the MTD section might be useful:
25 CONFIG_MTD_PHYSMAP_START=38100000
26 CONFIG_MTD_PHYSMAP_LEN=7a0000
27 CONFIG_MTD_PHYSMAP_BUSWIDTH=2
30 2) Program it in to the CDP flashbank with remon
31 u-boot.bin should be programmed att offset 0x7e000 and the kernel at
32 offset 0. If you want to use a jffs2 root file system (not included here),
33 it should be programmed to offset 0x100000.
37 remon> ns u-boot.bin 7e0000
39 remon> ns image.jffs2 100000
41 3) Connect a terminal to the 25pin serial port at 9600bps, and start the CDP.
46 4) U-Boot should output some message and a prompt on the terminal, to
47 start the kernel issue the following command:
51 5) The kernel should boot, and mount the root filesystem if present.
53 We hope you find this stuff useful
54 Daniel Engström, Omicron Ceti AB, daniel@omicron.se
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
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 },