mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-10-01 09:00:45 +09:00
2262cfeef9
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
75 lines
2.1 KiB
Plaintext
75 lines
2.1 KiB
Plaintext
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 }
|
|
};
|
|
|