MIPS: microMIPS: Add vdso support.
[firefly-linux-kernel-4.4.55.git] / arch / mips / power / cpu.c
1 /*
2  * Suspend support specific for mips.
3  *
4  * Licensed under the GPLv2
5  *
6  * Copyright (C) 2009 Lemote Inc.
7  * Author: Hu Hongbing <huhb@lemote.com>
8  *         Wu Zhangjin <wuzhangjin@gmail.com>
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 }