1This is my attempt to port U-Boot to the i386 platform. This 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 7It was originally based on PPCBoot taken from the CVS October 28 2002. 8 9To compile: 10 111) Unpack the source tree, either from the complete tarball or 12 from the virgin snapshot + the patch 13 142) Configure the source 15 $ make sc520_cdp_comfig 16 $ make 17 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 21 included at the end of this file. 22 The following options in the MTD section might be useful: 23 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 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. 34 35 remon> z 36 remon> yi 37 remon> ns u-boot.bin 7e0000 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. 42 43 remon> z 44 remon> g 45 464) U-Boot should output some message and a prompt on the terminal, to 47 start the kernel issue the following command: 48 49 BOOT> bootm 50 515) The kernel should boot, and mount the root filesystem if present. 52 53We hope you find this stuff useful 54Daniel Engström, Omicron Ceti AB, daniel@omicron.se 55 56 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 }; 73 74------------------- 75