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Commit | Line | Data |
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6732bc65 LP |
1 | #ifndef __ASM_SUSPEND_H |
2 | #define __ASM_SUSPEND_H | |
3 | ||
cabe1c81 | 4 | #define NR_CTX_REGS 10 |
adc9b2df | 5 | #define NR_CALLEE_SAVED_REGS 12 |
6732bc65 LP |
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 | */ | |
11 | struct 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); | |
95322526 | 19 | |
adc9b2df JM |
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 | */ | |
32 | struct sleep_stack_data { | |
33 | struct cpu_suspend_ctx system_regs; | |
34 | unsigned long callee_saved_regs[NR_CALLEE_SAVED_REGS]; | |
35 | }; | |
36 | ||
cabe1c81 JM |
37 | extern unsigned long *sleep_save_stash; |
38 | ||
af391b15 | 39 | extern int cpu_suspend(unsigned long arg, int (*fn)(unsigned long)); |
95322526 | 40 | extern void cpu_resume(void); |
adc9b2df JM |
41 | int __cpu_suspend_enter(struct sleep_stack_data *state); |
42 | void __cpu_suspend_exit(void); | |
6732bc65 | 43 | #endif |