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 Engstr�m, 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