diff options
author | Wu Zhangjin <wuzj@lemote.com> | 2009-06-04 12:27:10 (GMT) |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2009-06-17 10:06:31 (GMT) |
commit | 363c55cae53742f3f685a1814912c6d4fda245b4 (patch) | |
tree | 3be662ed49bbc90c80c9faa5e71176209989d2ea /arch/mips/power/cpu.c | |
parent | 4bb1a1089e321d685967032497f4363081eab3a9 (diff) | |
download | linux-fsl-qoriq-363c55cae53742f3f685a1814912c6d4fda245b4.tar.xz |
MIPS: Add hibernation support
[Ralf: SMP support requires CPU hotplugging which MIPS currently doesn't
support. As implemented in this patch cache and tlb flushing will also be
invoked with interrupts disabled so smp_call_function() will blow up in
charming ways. So limit to !SMP.]
Reviewed-by: Pavel Machek <pavel@ucw.cz>
Reviewed-by: Yan Hua <yanh@lemote.com>
Reviewed-by: Arnaud Patard <apatard@mandriva.com>
Reviewed-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Wu Zhangjin <wuzj@lemote.com>
Signed-off-by: Hu Hongbing <huhb@lemote.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/power/cpu.c')
-rw-r--r-- | arch/mips/power/cpu.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/mips/power/cpu.c b/arch/mips/power/cpu.c new file mode 100644 index 0000000..7995df4 --- /dev/null +++ b/arch/mips/power/cpu.c @@ -0,0 +1,43 @@ +/* + * Suspend support specific for mips. + * + * Licensed under the GPLv2 + * + * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology + * Author: Hu Hongbing <huhb@lemote.com> + * Wu Zhangjin <wuzj@lemote.com> + */ +#include <asm/suspend.h> +#include <asm/fpu.h> +#include <asm/dsp.h> + +static u32 saved_status; +struct pt_regs saved_regs; + +void save_processor_state(void) +{ + saved_status = read_c0_status(); + + if (is_fpu_owner()) + save_fp(current); + if (cpu_has_dsp) + save_dsp(current); +} + +void restore_processor_state(void) +{ + write_c0_status(saved_status); + + if (is_fpu_owner()) + restore_fp(current); + if (cpu_has_dsp) + restore_dsp(current); +} + +int pfn_is_nosave(unsigned long pfn) +{ + unsigned long nosave_begin_pfn = PFN_DOWN(__pa(&__nosave_begin)); + unsigned long nosave_end_pfn = PFN_UP(__pa(&__nosave_end)); + + return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn); +} |