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arm64: kernel: refactor the CPU suspend API for retention states
[karo-tx-linux.git] / arch / arm64 / include / asm / suspend.h
1 #ifndef __ASM_SUSPEND_H
2 #define __ASM_SUSPEND_H
3
4 #define NR_CTX_REGS 11
5
6 /*
7  * struct cpu_suspend_ctx must be 16-byte aligned since it is allocated on
8  * the stack, which must be 16-byte aligned on v8
9  */
10 struct cpu_suspend_ctx {
11         /*
12          * This struct must be kept in sync with
13          * cpu_do_{suspend/resume} in mm/proc.S
14          */
15         u64 ctx_regs[NR_CTX_REGS];
16         u64 sp;
17 } __aligned(16);
18
19 struct sleep_save_sp {
20         phys_addr_t *save_ptr_stash;
21         phys_addr_t save_ptr_stash_phys;
22 };
23
24 extern int __cpu_suspend(unsigned long arg, int (*fn)(unsigned long));
25 extern void cpu_resume(void);
26 extern int cpu_suspend(unsigned long);
27
28 #endif