| 1 | // SPDX-License-Identifier: GPL-2.0-only |
|---|---|
| 2 | /* |
| 3 | * Suspend support specific for mips. |
| 4 | * |
| 5 | * Copyright (C) 2009 Lemote Inc. |
| 6 | * Author: Hu Hongbing <huhb@lemote.com> |
| 7 | * Wu Zhangjin <wuzhangjin@gmail.com> |
| 8 | */ |
| 9 | #include <linux/suspend.h> |
| 10 | #include <asm/sections.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 | |
| 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 | |
| 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 | } |
| 44 |