diff options
Diffstat (limited to 'kernel/arch/mips/power')
| -rw-r--r-- | kernel/arch/mips/power/Makefile | 1 | ||||
| -rw-r--r-- | kernel/arch/mips/power/cpu.c | 43 | ||||
| -rw-r--r-- | kernel/arch/mips/power/hibernate.c | 10 | ||||
| -rw-r--r-- | kernel/arch/mips/power/hibernate_asm.S | 61 |
4 files changed, 115 insertions, 0 deletions
diff --git a/kernel/arch/mips/power/Makefile b/kernel/arch/mips/power/Makefile new file mode 100644 index 000000000..70bd7883b --- /dev/null +++ b/kernel/arch/mips/power/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_HIBERNATION) += cpu.o hibernate.o hibernate_asm.o diff --git a/kernel/arch/mips/power/cpu.c b/kernel/arch/mips/power/cpu.c new file mode 100644 index 000000000..2129e6772 --- /dev/null +++ b/kernel/arch/mips/power/cpu.c @@ -0,0 +1,43 @@ +/* + * Suspend support specific for mips. + * + * Licensed under the GPLv2 + * + * Copyright (C) 2009 Lemote Inc. + * Author: Hu Hongbing <huhb@lemote.com> + * Wu Zhangjin <wuzhangjin@gmail.com> + */ +#include <asm/sections.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); +} diff --git a/kernel/arch/mips/power/hibernate.c b/kernel/arch/mips/power/hibernate.c new file mode 100644 index 000000000..19a9af68b --- /dev/null +++ b/kernel/arch/mips/power/hibernate.c @@ -0,0 +1,10 @@ +#include <asm/tlbflush.h> + +extern int restore_image(void); + +int swsusp_arch_resume(void) +{ + /* Avoid TLB mismatch during and after kernel resume */ + local_flush_tlb_all(); + return restore_image(); +} diff --git a/kernel/arch/mips/power/hibernate_asm.S b/kernel/arch/mips/power/hibernate_asm.S new file mode 100644 index 000000000..b1fab9511 --- /dev/null +++ b/kernel/arch/mips/power/hibernate_asm.S @@ -0,0 +1,61 @@ +/* + * Hibernation support specific for mips - temporary page tables + * + * Licensed under the GPLv2 + * + * Copyright (C) 2009 Lemote Inc. + * Author: Hu Hongbing <huhb@lemote.com> + * Wu Zhangjin <wuzhangjin@gmail.com> + */ +#include <asm/asm-offsets.h> +#include <asm/regdef.h> +#include <asm/asm.h> + +.text +LEAF(swsusp_arch_suspend) + PTR_LA t0, saved_regs + PTR_S ra, PT_R31(t0) + PTR_S sp, PT_R29(t0) + PTR_S fp, PT_R30(t0) + PTR_S gp, PT_R28(t0) + PTR_S s0, PT_R16(t0) + PTR_S s1, PT_R17(t0) + PTR_S s2, PT_R18(t0) + PTR_S s3, PT_R19(t0) + PTR_S s4, PT_R20(t0) + PTR_S s5, PT_R21(t0) + PTR_S s6, PT_R22(t0) + PTR_S s7, PT_R23(t0) + j swsusp_save +END(swsusp_arch_suspend) + +LEAF(restore_image) + PTR_L t0, restore_pblist +0: + PTR_L t1, PBE_ADDRESS(t0) /* source */ + PTR_L t2, PBE_ORIG_ADDRESS(t0) /* destination */ + PTR_ADDU t3, t1, _PAGE_SIZE +1: + REG_L t8, (t1) + REG_S t8, (t2) + PTR_ADDIU t1, t1, SZREG + PTR_ADDIU t2, t2, SZREG + bne t1, t3, 1b + PTR_L t0, PBE_NEXT(t0) + bnez t0, 0b + PTR_LA t0, saved_regs + PTR_L ra, PT_R31(t0) + PTR_L sp, PT_R29(t0) + PTR_L fp, PT_R30(t0) + PTR_L gp, PT_R28(t0) + PTR_L s0, PT_R16(t0) + PTR_L s1, PT_R17(t0) + PTR_L s2, PT_R18(t0) + PTR_L s3, PT_R19(t0) + PTR_L s4, PT_R20(t0) + PTR_L s5, PT_R21(t0) + PTR_L s6, PT_R22(t0) + PTR_L s7, PT_R23(t0) + PTR_LI v0, 0x0 + jr ra +END(restore_image) |