mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-20 03:38:43 +00:00
7a8e9bed17
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
84 lines
2 KiB
ArmAsm
84 lines
2 KiB
ArmAsm
/*
|
|
* (C) Copyright 2002
|
|
* Daniel Engström, Omicron Ceti AB <daniel@omicron.se>.
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
/*
|
|
* 16bit initialization code.
|
|
* This code have to map the area of the boot flash
|
|
* that is used by U-boot to its final destination.
|
|
*/
|
|
|
|
.text
|
|
.section .start16, "ax"
|
|
.code16
|
|
.globl board_init16
|
|
board_init16:
|
|
/* 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
|
|
|
|
/* Map the entire flash at 0x38000000
|
|
* (with BOOTCS and PAR14, use 0xabfff800 for ROMCS1) */
|
|
movl $0xc0, %edi
|
|
movl $0x8bfff800, %eax
|
|
movl %eax, (%di)
|
|
|
|
/* Disable SDRAM write buffer */
|
|
movw $0x40,%di
|
|
xorw %ax,%ax
|
|
movb %al, (%di)
|
|
|
|
/* Disabe MMCR alias */
|
|
movw $0xfffc, %dx
|
|
movl $0x000000cb, %eax
|
|
outl %eax, %dx
|
|
|
|
/* the return address is stored 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
|
|
|