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- /*
- * (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 tored in bp */
- jmp *%bp
-
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