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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> |
f7a904df | 8 | * Wu Zhangjin <wuzhangjin@gmail.com> |
363c55ca WZ |
9 | */ |
10 | #include <asm/suspend.h> | |
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 | } |