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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_spunk/sc520_spunk_asm.S
parent3b57fe0a70b903f4db66c558bb9828bc58acf06b (diff)
* Patch by Marc Singer, 29 May 2003:LABEL_2003_05_31_2115
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_spunk/sc520_spunk_asm.S')
-rw-r--r--board/sc520_spunk/sc520_spunk_asm.S82
1 files changed, 82 insertions, 0 deletions
diff --git a/board/sc520_spunk/sc520_spunk_asm.S b/board/sc520_spunk/sc520_spunk_asm.S
new file mode 100644
index 0000000000..e198125b8c
--- /dev/null
+++ b/board/sc520_spunk/sc520_spunk_asm.S
@@ -0,0 +1,82 @@
+/*
+ * (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
+ */
+
+/* now setup the General purpose bus to give us access to the LEDs.
+ * We can then use the leds to display status information.
+ */
+
+sc520_cdp_registers:
+/* size offset value */
+.word 1 ; .word 0x040 ; .long 0x00 /* SDRAM buffer control */
+.word 2 ; .word 0xc08 ; .long 0x0001 /* GP CS offset */
+.word 2 ; .word 0xc09 ; .long 0x0003 /* GP CS width */
+.word 2 ; .word 0xc0a ; .long 0x0001 /* GP CS width */
+.word 2 ; .word 0xc0b ; .long 0x0003 /* GP RD pulse width */
+.word 2 ; .word 0xc0c ; .long 0x0001 /* GP RD offse */
+.word 2 ; .word 0xc0d ; .long 0x0003 /* GP WR pulse width */
+.word 2 ; .word 0xc0e ; .long 0x0001 /* GP WR offset */
+.word 2 ; .word 0xc2c ; .long 0x003f /* GPIO directionreg 31-16 */
+.word 2 ; .word 0xc2a ; .long 0xe000 /* GPIO directionreg 15-0 */
+.word 2 ; .word 0xc22 ; .long 0xffc0 /* GPIO pin function 31-16 reg */
+.word 2 ; .word 0xc20 ; .long 0x1fff /* GPIO pin function 15-0 reg */
+.word 0 ; .word 0x000 ; .long 0x00
+
+/* board early intialization */
+.globl early_board_init
+early_board_init:
+ movl $sc520_cdp_registers,%esi
+init_loop:
+ movl $0xfffef000,%edi /* MMCR base to edi */
+ movw (%esi), %bx /* load size to bx */
+ cmpw $0, %bx /* if size is 0 we're done */
+ je done
+ xorl %edx,%edx
+ movw 2(%esi), %dx /* load MMCR offset to dx */
+ addl %edx, %edi /* add offset to base in edi */
+ movl 4(%esi), %eax /* load value in eax */
+ cmpw $1, %bx
+ je byte /* byte op? */
+ cmpw $2, %bx
+ je word /* word op? */
+ movl %eax, (%edi) /* must be long, then */
+ jmp next
+byte: movb %al,(%edi)
+ jmp next
+word: movw %ax,(%edi)
+next: addl $8, %esi /* advance esi */
+ jmp init_loop
+
+ /* light all leds */
+done: movl $0xfffefc32,%edx
+ movw $0000,(%edx)
+
+ jmp *%ebp /* return to caller */
+
+
+.globl __show_boot_progress
+__show_boot_progress:
+ movl $0xfffefc32,%edx
+ xorw $0xffff, %ax
+ movw %ax,(%edx)
+ jmp *%ebp
+