55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
#ifndef __ASM_SUSPEND_H
|
||
|
|
#define __ASM_SUSPEND_H
|
||
|
|
|
||
|
|
#define NR_CTX_REGS 13
|
||
|
|
#define NR_CALLEE_SAVED_REGS 12
|
||
|
|
|
||
|
|
/*
|
||
|
|
* struct cpu_suspend_ctx must be 16-byte aligned since it is allocated on
|
||
|
|
* the stack, which must be 16-byte aligned on v8
|
||
|
|
*/
|
||
|
|
struct cpu_suspend_ctx {
|
||
|
|
/*
|
||
|
|
* This struct must be kept in sync with
|
||
|
|
* cpu_do_{suspend/resume} in mm/proc.S
|
||
|
|
*/
|
||
|
|
u64 ctx_regs[NR_CTX_REGS];
|
||
|
|
u64 sp;
|
||
|
|
} __aligned(16);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Memory to save the cpu state is allocated on the stack by
|
||
|
|
* __cpu_suspend_enter()'s caller, and populated by __cpu_suspend_enter().
|
||
|
|
* This data must survive until cpu_resume() is called.
|
||
|
|
*
|
||
|
|
* This struct desribes the size and the layout of the saved cpu state.
|
||
|
|
* The layout of the callee_saved_regs is defined by the implementation
|
||
|
|
* of __cpu_suspend_enter(), and cpu_resume(). This struct must be passed
|
||
|
|
* in by the caller as __cpu_suspend_enter()'s stack-frame is gone once it
|
||
|
|
* returns, and the data would be subsequently corrupted by the call to the
|
||
|
|
* finisher.
|
||
|
|
*/
|
||
|
|
struct sleep_stack_data {
|
||
|
|
struct cpu_suspend_ctx system_regs;
|
||
|
|
unsigned long callee_saved_regs[NR_CALLEE_SAVED_REGS];
|
||
|
|
};
|
||
|
|
|
||
|
|
extern unsigned long *sleep_save_stash;
|
||
|
|
|
||
|
|
extern int cpu_suspend(unsigned long arg, int (*fn)(unsigned long));
|
||
|
|
extern void cpu_resume(void);
|
||
|
|
int __cpu_suspend_enter(struct sleep_stack_data *state);
|
||
|
|
void __cpu_suspend_exit(void);
|
||
|
|
void _cpu_resume(void);
|
||
|
|
|
||
|
|
int swsusp_arch_suspend(void);
|
||
|
|
int swsusp_arch_resume(void);
|
||
|
|
int arch_hibernation_header_save(void *addr, unsigned int max_size);
|
||
|
|
int arch_hibernation_header_restore(void *addr);
|
||
|
|
|
||
|
|
/* Used to resume on the CPU we hibernated on */
|
||
|
|
int hibernate_resume_nonboot_cpu_disable(void);
|
||
|
|
|
||
|
|
#endif
|