/* SPDX-License-Identifier: GPL-2.0 */
#ifndef LINUX_CRASH_RESERVE_H
#define LINUX_CRASH_RESERVE_H

#include <linux/linkage.h>
#include <linux/elfcore.h>
#include <linux/elf.h>
#ifdef CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
#include <asm/crash_reserve.h>
#endif

/* Location of a reserved region to hold the crash kernel.
 */
extern struct resource crashk_res;
extern struct resource crashk_low_res;

int __init parse_crashkernel(char *cmdline, unsigned long long system_ram,
		unsigned long long *crash_size, unsigned long long *crash_base,
		unsigned long long *low_size, bool *high);

#ifdef CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
#ifndef DEFAULT_CRASH_KERNEL_LOW_SIZE
#define DEFAULT_CRASH_KERNEL_LOW_SIZE	(128UL << 20)
#endif
#ifndef CRASH_ALIGN
#define CRASH_ALIGN			SZ_2M
#endif
#ifndef CRASH_ADDR_LOW_MAX
#define CRASH_ADDR_LOW_MAX		SZ_4G
#endif
#ifndef CRASH_ADDR_HIGH_MAX
#define CRASH_ADDR_HIGH_MAX		memblock_end_of_DRAM()
#endif

void __init reserve_crashkernel_generic(char *cmdline,
		unsigned long long crash_size,
		unsigned long long crash_base,
		unsigned long long crash_low_size,
		bool high);
#else
static inline void __init reserve_crashkernel_generic(char *cmdline,
		unsigned long long crash_size,
		unsigned long long crash_base,
		unsigned long long crash_low_size,
		bool high)
{}
#endif
#endif /* LINUX_CRASH_RESERVE_H */