diff options
| author | Paul Mundt <lethal@linux-sh.org> | 2009-11-24 16:32:11 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-11-24 16:32:11 +0900 |
| commit | 49fb2cd2571e0134e5a12c5abab227696e4940c7 (patch) | |
| tree | 9a77364e988ef3f3af24feee3f5bb91bd0c34129 /arch/sh/boards/mach-migor/sdram.S | |
| parent | dfc349402de8e95f6a42e8341e9ea193b718eee3 (diff) | |
| parent | 260af56271f79da0e37faa5a99b1786b221297e5 (diff) | |
Merge branch 'master' into sh/st-integration
Diffstat (limited to 'arch/sh/boards/mach-migor/sdram.S')
| -rw-r--r-- | arch/sh/boards/mach-migor/sdram.S | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/arch/sh/boards/mach-migor/sdram.S b/arch/sh/boards/mach-migor/sdram.S new file mode 100644 index 00000000000..614aa3a1398 --- /dev/null +++ b/arch/sh/boards/mach-migor/sdram.S @@ -0,0 +1,69 @@ +/* + * Migo-R sdram self/auto-refresh setup code + * + * Copyright (C) 2009 Magnus Damm + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/sys.h> +#include <linux/errno.h> +#include <linux/linkage.h> +#include <asm/asm-offsets.h> +#include <asm/suspend.h> +#include <asm/romimage-macros.h> + +/* code to enter and leave self-refresh. must be self-contained. + * this code will be copied to on-chip memory and executed from there. + */ + .balign 4 +ENTRY(migor_sdram_enter_start) + + /* SBSC: disable power down and put in self-refresh mode */ + mov.l 1f, r4 + mov.l 2f, r1 + mov.l @r4, r2 + or r1, r2 + mov.l 3f, r3 + and r3, r2 + mov.l r2, @r4 + + rts + nop + + .balign 4 +1: .long 0xfe400008 /* SDCR0 */ +2: .long 0x00000400 +3: .long 0xffff7fff +ENTRY(migor_sdram_enter_end) + + .balign 4 +ENTRY(migor_sdram_leave_start) + + /* SBSC: set auto-refresh mode */ + mov.l 1f, r4 + mov.l @r4, r0 + mov.l 4f, r1 + and r1, r0 + mov.l r0, @r4 + mov.l 6f, r4 + mov.l 8f, r0 + mov.l @r4, r1 + mov #-1, r4 + add r4, r1 + or r1, r0 + mov.l 7f, r1 + mov.l r0, @r1 + + rts + nop + + .balign 4 +1: .long 0xfe400008 /* SDCR0 */ +4: .long 0xfffffbff +6: .long 0xfe40001c /* RTCOR */ +7: .long 0xfe400018 /* RTCNT */ +8: .long 0xa55a0000 +ENTRY(migor_sdram_leave_end) |