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Linux kernel mirror (for testing)
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linux
1#ifndef __ASM_SUSPEND_H
2#define __ASM_SUSPEND_H
3
4#define NR_CTX_REGS 10
5#define NR_CALLEE_SAVED_REGS 12
6
7/*
8 * struct cpu_suspend_ctx must be 16-byte aligned since it is allocated on
9 * the stack, which must be 16-byte aligned on v8
10 */
11struct cpu_suspend_ctx {
12 /*
13 * This struct must be kept in sync with
14 * cpu_do_{suspend/resume} in mm/proc.S
15 */
16 u64 ctx_regs[NR_CTX_REGS];
17 u64 sp;
18} __aligned(16);
19
20/*
21 * Memory to save the cpu state is allocated on the stack by
22 * __cpu_suspend_enter()'s caller, and populated by __cpu_suspend_enter().
23 * This data must survive until cpu_resume() is called.
24 *
25 * This struct desribes the size and the layout of the saved cpu state.
26 * The layout of the callee_saved_regs is defined by the implementation
27 * of __cpu_suspend_enter(), and cpu_resume(). This struct must be passed
28 * in by the caller as __cpu_suspend_enter()'s stack-frame is gone once it
29 * returns, and the data would be subsequently corrupted by the call to the
30 * finisher.
31 */
32struct sleep_stack_data {
33 struct cpu_suspend_ctx system_regs;
34 unsigned long callee_saved_regs[NR_CALLEE_SAVED_REGS];
35};
36
37extern unsigned long *sleep_save_stash;
38
39extern int cpu_suspend(unsigned long arg, int (*fn)(unsigned long));
40extern void cpu_resume(void);
41int __cpu_suspend_enter(struct sleep_stack_data *state);
42void __cpu_suspend_exit(void);
43void _cpu_resume(void);
44
45int swsusp_arch_suspend(void);
46int swsusp_arch_resume(void);
47int arch_hibernation_header_save(void *addr, unsigned int max_size);
48int arch_hibernation_header_restore(void *addr);
49
50#endif