3 * Daniel Engström, Omicron Ceti AB <daniel@omicron.se>.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 /* now setup the General purpose bus to give us access to the LEDs.
25 * We can then use the leds to display status information.
29 /* size offset value */
30 .word 1 ; .word 0x040 ; .long 0x00 /* SDRAM buffer control */
31 .word 2 ; .word 0xc08 ; .long 0x0001 /* GP CS offset */
32 .word 2 ; .word 0xc09 ; .long 0x0003 /* GP CS width */
33 .word 2 ; .word 0xc0a ; .long 0x0001 /* GP CS width */
34 .word 2 ; .word 0xc0b ; .long 0x0003 /* GP RD pulse width */
35 .word 2 ; .word 0xc0c ; .long 0x0001 /* GP RD offse */
36 .word 2 ; .word 0xc0d ; .long 0x0003 /* GP WR pulse width */
37 .word 2 ; .word 0xc0e ; .long 0x0001 /* GP WR offset */
38 .word 2 ; .word 0xc2c ; .long 0x003f /* GPIO directionreg 31-16 */
39 .word 2 ; .word 0xc2a ; .long 0xe000 /* GPIO directionreg 15-0 */
40 .word 2 ; .word 0xc22 ; .long 0xffc0 /* GPIO pin function 31-16 reg */
41 .word 2 ; .word 0xc20 ; .long 0x1fff /* GPIO pin function 15-0 reg */
42 .word 0 ; .word 0x000 ; .long 0x00
44 /* board early intialization */
45 .globl early_board_init
47 movl $sc520_cdp_registers,%esi
49 movl $0xfffef000,%edi /* MMCR base to edi */
50 movw (%esi), %bx /* load size to bx */
51 cmpw $0, %bx /* if size is 0 we're done */
54 movw 2(%esi), %dx /* load MMCR offset to dx */
55 addl %edx, %edi /* add offset to base in edi */
56 movl 4(%esi), %eax /* load value in eax */
58 je byte /* byte op? */
60 je word /* word op? */
61 movl %eax, (%edi) /* must be long, then */
66 next: addl $8, %esi /* advance esi */
70 done: movl $0xfffefc32,%edx
73 jmp *%ebp /* return to caller */
76 .globl show_boot_progress