diff options
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 00000000000..7995df45dc8 --- /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); +} |