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Current File : /lib/modules/6.8.0-1031-aws/build/arch/riscv/include/asm/kexec.h
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2019 FORTH-ICS/CARV
 *  Nick Kossifidis <mick@ics.forth.gr>
 */

#ifndef _RISCV_KEXEC_H
#define _RISCV_KEXEC_H

#include <asm/page.h>    /* For PAGE_SIZE */

/* Maximum physical address we can use pages from */
#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)

/* Maximum address we can reach in physical address mode */
#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)

/* Maximum address we can use for the control code buffer */
#define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)

/* Reserve a page for the control code buffer */
#define KEXEC_CONTROL_PAGE_SIZE PAGE_SIZE

#define KEXEC_ARCH KEXEC_ARCH_RISCV

extern void riscv_crash_save_regs(struct pt_regs *newregs);

static inline void
crash_setup_regs(struct pt_regs *newregs,
		 struct pt_regs *oldregs)
{
	if (oldregs)
		memcpy(newregs, oldregs, sizeof(struct pt_regs));
	else
		riscv_crash_save_regs(newregs);
}


#define ARCH_HAS_KIMAGE_ARCH

struct kimage_arch {
	void *fdt; /* For CONFIG_KEXEC_FILE */
	unsigned long fdt_addr;
};

extern const unsigned char riscv_kexec_relocate[];
extern const unsigned int riscv_kexec_relocate_size;

typedef void (*riscv_kexec_method)(unsigned long first_ind_entry,
				   unsigned long jump_addr,
				   unsigned long fdt_addr,
				   unsigned long hartid,
				   unsigned long va_pa_off);

extern riscv_kexec_method riscv_kexec_norelocate;

#ifdef CONFIG_KEXEC_FILE
extern const struct kexec_file_ops elf_kexec_ops;

struct purgatory_info;
int arch_kexec_apply_relocations_add(struct purgatory_info *pi,
				     Elf_Shdr *section,
				     const Elf_Shdr *relsec,
				     const Elf_Shdr *symtab);
#define arch_kexec_apply_relocations_add arch_kexec_apply_relocations_add

struct kimage;
int arch_kimage_file_post_load_cleanup(struct kimage *image);
#define arch_kimage_file_post_load_cleanup arch_kimage_file_post_load_cleanup
#endif

#endif

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