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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