| 1 | |
| 2 | |
| 3 | * Suspend support specific for mips.
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| 4 | *
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| 5 | * Copyright (C) 2009 Lemote Inc.
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| 6 | * Author: Hu Hongbing <[email protected]>
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| 7 | * Wu Zhangjin <[email protected]>
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| 8 |
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| 9 | #include <linux/suspend.h>
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| 10 | #include <asm/sections.h>
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| 11 | #include <asm/fpu.h>
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| 12 | #include <asm/dsp.h>
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| 13 |
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| 14 | static u32 saved_status;
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| 15 | struct pt_regs saved_regs;
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| 16 |
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| 17 | void save_processor_state(void)
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| 18 | {
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| 19 | saved_status = read_c0_status();
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| 20 |
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| 21 | if (is_fpu_owner())
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| 22 | save_fp(current);
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| 23 |
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| 24 | save_dsp(current);
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| 25 | }
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| 26 |
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| 27 | void restore_processor_state(void)
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| 28 | {
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| 29 | write_c0_status(saved_status);
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| 30 |
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| 31 | if (is_fpu_owner())
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| 32 | restore_fp(current);
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| 33 |
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| 34 | restore_dsp(current);
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| 35 | }
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| 36 |
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| 37 | int pfn_is_nosave(unsigned long pfn)
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| 38 | {
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| 39 | unsigned long nosave_begin_pfn = PFN_DOWN(__pa(&__nosave_begin));
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| 40 | unsigned long nosave_end_pfn = PFN_UP(__pa(&__nosave_end));
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| 41 |
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| 42 | return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
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| 43 | }
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