| This is my attempt to port U-Boot 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 | |
| u-boot.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 u-boot.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) U-Boot 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 Engstrรถm, 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 } | |
| }; | |
| ------------------- |