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authorwdenk <wdenk>2003-05-31 18:35:21 +0000
committerwdenk <wdenk>2003-05-31 18:35:21 +0000
commit7a8e9bed17d7924a9c5c4699b1f6a3a0359524ed (patch)
tree5c273df9c5efa7b1b6a4ca88904e48039ef591e8 /board/sc520_cdp/sc520_cdp_asm16.S
parent3b57fe0a70b903f4db66c558bb9828bc58acf06b (diff)
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* Patch by Marc Singer, 29 May 2003:
Fixed rarp boot method for IA32 and other little-endian CPUs. * Patch by Marc Singer, 28 May 2003: Added port I/O commands. * Patch by Matthew McClintock, 28 May 2003 - cpu/mpc824x/start.S: fix relocation code when booting from RAM - minor patches for utx8245 * Patch by Daniel Engström, 28 May 2003: x86 update * Patch by Dave Ellis, 9 May 2003 + 27 May 2003: add nand flash support to SXNI855T configuration fix/extend nand flash support: - fix 'nand erase' command so does not erase bad blocks - fix 'nand write' command so does not write to bad blocks - fix nand_probe() so handles no flash detected properly - add doc/README.nand - add .jffs2 and .oob options to nand read/write - add 'nand bad' command to list bad blocks - add 'clean' option to 'nand erase' to write JFFS2 clean markers - make NAND read/write faster * Patch by Rune Torgersen, 23 May 2003: Update for MPC8266ADS board
Diffstat (limited to 'board/sc520_cdp/sc520_cdp_asm16.S')
-rw-r--r--board/sc520_cdp/sc520_cdp_asm16.S22
1 files changed, 22 insertions, 0 deletions
diff --git a/board/sc520_cdp/sc520_cdp_asm16.S b/board/sc520_cdp/sc520_cdp_asm16.S
index a3cadcf..0e0b0c0 100644
--- a/board/sc520_cdp/sc520_cdp_asm16.S
+++ b/board/sc520_cdp/sc520_cdp_asm16.S
@@ -60,3 +60,25 @@ board_init16:
/* the return address is tored in bp */
jmp *%bp
+
+.section .bios, "ax"
+.code16
+.globl realmode_reset
+realmode_reset:
+ /* Alias MMCR to 0xdf000 */
+ movw $0xfffc, %dx
+ movl $0x800df0cb, %eax
+ outl %eax, %dx
+
+ /* Set ds to point to MMCR alias */
+ movw $0xdf00, %ax
+ movw %ax, %ds
+
+ /* issue software reset thorugh MMCR */
+ movl $0xd72, %edi
+ movb $0x01, %al
+ movb %al, (%di)
+
+1: hlt
+ jmp 1
+