projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 363c55ca WZ |
1 | /* |
| 2 | * Suspend support specific for mips. | |
| 3 | * | |
| 4 | * Licensed under the GPLv2 | |
| 5 | * | |
| f7a904df | 6 | * Copyright (C) 2009 Lemote Inc. |
| 363c55ca | 7 | * Author: Hu Hongbing <huhb@lemote.com> |
| 70342287 | 8 | * Wu Zhangjin <wuzhangjin@gmail.com> |
| 363c55ca | 9 | */ |
| 7f8998c7 | 10 | #include <asm/sections.h> |
| 363c55ca WZ |
11 | #include <asm/fpu.h> |
| 12 | #include <asm/dsp.h> | |
| 13 | ||
| 14 | static u32 saved_status; | |
| 15 | struct pt_regs saved_regs; | |
| 16 | ||
| 17 | void save_processor_state(void) | |
| 18 | { | |
| 19 | saved_status = read_c0_status(); | |
| 20 | ||
| 21 | if (is_fpu_owner()) | |
| 22 | save_fp(current); | |
| 23 | if (cpu_has_dsp) | |
| 24 | save_dsp(current); | |
| 25 | } | |
| 26 | ||
| 27 | void restore_processor_state(void) | |
| 28 | { | |
| 29 | write_c0_status(saved_status); | |
| 30 | ||
| 31 | if (is_fpu_owner()) | |
| 32 | restore_fp(current); | |
| 33 | if (cpu_has_dsp) | |
| 34 | restore_dsp(current); | |
| 35 | } | |
| 36 | ||
| 37 | int pfn_is_nosave(unsigned long pfn) | |
| 38 | { | |
| 39 | unsigned long nosave_begin_pfn = PFN_DOWN(__pa(&__nosave_begin)); | |
| 40 | unsigned long nosave_end_pfn = PFN_UP(__pa(&__nosave_end)); | |
| 41 | ||
| 42 | return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn); | |
| 43 | } |