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