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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/arm64/include/asm/suspend.h | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm64/include/asm/suspend.h')
-rw-r--r-- | arch/arm64/include/asm/suspend.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/suspend.h b/arch/arm64/include/asm/suspend.h new file mode 100644 index 0000000000..0cde2f4739 --- /dev/null +++ b/arch/arm64/include/asm/suspend.h @@ -0,0 +1,54 @@ +/* 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 |