diff options
author | James Morris <jmorris@namei.org> | 2009-03-27 08:28:11 +1100 |
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committer | James Morris <jmorris@namei.org> | 2009-03-27 08:28:11 +1100 |
commit | 1987f17d2266e882862528841429b5bf67bc8fe5 (patch) | |
tree | 5c3fbee88018ab7259a18c10e6320e575d0ed679 /arch/sh/kernel/cpu/shmobile/sleep.S | |
parent | 7198e2eeb44b3fe7cc97f997824002da47a9c644 (diff) | |
parent | 0384e2959127a56d0640505d004d8dd92f9c29f5 (diff) |
Merge branch 'master' into next
Diffstat (limited to 'arch/sh/kernel/cpu/shmobile/sleep.S')
-rw-r--r-- | arch/sh/kernel/cpu/shmobile/sleep.S | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/arch/sh/kernel/cpu/shmobile/sleep.S b/arch/sh/kernel/cpu/shmobile/sleep.S new file mode 100644 index 00000000000..5d888ef53d8 --- /dev/null +++ b/arch/sh/kernel/cpu/shmobile/sleep.S @@ -0,0 +1,125 @@ +/* + * arch/sh/kernel/cpu/sh4a/sleep-sh_mobile.S + * + * Sleep mode and Standby modes support for SuperH Mobile + * + * 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> + +/* manage self-refresh and enter standby mode. + * this code will be copied to on-chip memory and executed from there. + */ + + .balign 4096,0,4096 +ENTRY(sh_mobile_standby) + mov r4, r0 + + tst #SUSP_SH_SF, r0 + bt skip_set_sf + + /* SDRAM: 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 + +skip_set_sf: + tst #SUSP_SH_SLEEP, r0 + bt test_standby + + /* set mode to "sleep mode" */ + bra do_sleep + mov #0x00, r1 + +test_standby: + tst #SUSP_SH_STANDBY, r0 + bt test_rstandby + + /* set mode to "software standby mode" */ + bra do_sleep + mov #0x80, r1 + +test_rstandby: + tst #SUSP_SH_RSTANDBY, r0 + bt test_ustandby + + /* set mode to "r-standby mode" */ + bra do_sleep + mov #0x20, r1 + +test_ustandby: + tst #SUSP_SH_USTANDBY, r0 + bt done_sleep + + /* set mode to "u-standby mode" */ + mov #0x10, r1 + + /* fall-through */ + +do_sleep: + /* setup and enter selected standby mode */ + mov.l 5f, r4 + mov.l r1, @r4 + sleep + +done_sleep: + /* reset standby mode to sleep mode */ + mov.l 5f, r4 + mov #0x00, r1 + mov.l r1, @r4 + + tst #SUSP_SH_SF, r0 + bt skip_restore_sf + + /* SDRAM: set auto-refresh mode */ + mov.l 1f, r4 + mov.l @r4, r2 + mov.l 4f, r3 + and r3, r2 + mov.l r2, @r4 + mov.l 6f, r4 + mov.l 7f, r1 + mov.l 8f, r2 + mov.l @r4, r3 + mov #-1, r4 + add r4, r3 + or r2, r3 + mov.l r3, @r1 +skip_restore_sf: + rts + nop + + .balign 4 +1: .long 0xfe400008 /* SDCR0 */ +2: .long 0x00000400 +3: .long 0xffff7fff +4: .long 0xfffffbff +5: .long 0xa4150020 /* STBCR */ +6: .long 0xfe40001c /* RTCOR */ +7: .long 0xfe400018 /* RTCNT */ +8: .long 0xa55a0000 + +/* interrupt vector @ 0x600 */ + .balign 0x400,0,0x400 + .long 0xdeadbeef + .balign 0x200,0,0x200 + /* sh7722 will end up here in sleep mode */ + rte + nop +sh_mobile_standby_end: + +ENTRY(sh_mobile_standby_size) + .long sh_mobile_standby_end - sh_mobile_standby |