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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2021 Western Digital Corporation or its affiliates.
* Copyright (c) 2022 Ventana Micro Systems Inc.
*/
#ifndef _ASM_RISCV_SUSPEND_H
#define _ASM_RISCV_SUSPEND_H
#include <asm/ptrace.h>
struct suspend_context {
/* Saved and restored by low-level functions */
struct pt_regs regs;
/* Saved and restored by high-level functions */
unsigned long scratch;
unsigned long envcfg;
unsigned long tvec;
unsigned long ie;
#ifdef CONFIG_MMU
unsigned long satp;
#endif
};
/*
* Used by hibernation core and cleared during resume sequence
*/
extern int in_suspend;
/* Low-level CPU suspend entry function */
int __cpu_suspend_enter(struct suspend_context *context);
/* High-level CPU suspend which will save context and call finish() */
int cpu_suspend(unsigned long arg,
int (*finish)(unsigned long arg,
unsigned long entry,
unsigned long context));
/* Low-level CPU resume entry function */
int __cpu_resume_enter(unsigned long hartid, unsigned long context);
/* Used to save and restore the CSRs */
void suspend_save_csrs(struct suspend_context *context);
void suspend_restore_csrs(struct suspend_context *context);
/* Low-level API to support hibernation */
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);
int __hibernate_cpu_resume(void);
/* Used to resume on the CPU we hibernated on */
int hibernate_resume_nonboot_cpu_disable(void);
asmlinkage void hibernate_restore_image(unsigned long resume_satp, unsigned long satp_temp,
unsigned long cpu_resume);
asmlinkage int hibernate_core_restore_code(void);
#endif