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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef LINUX_CRASH_RESERVE_H
3#define LINUX_CRASH_RESERVE_H
4
5#include <linux/linkage.h>
6#include <linux/elfcore.h>
7#include <linux/elf.h>
8#ifdef CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
9#include <asm/crash_reserve.h>
10#endif
11
12/* Location of a reserved region to hold the crash kernel.
13 */
14extern struct resource crashk_res;
15extern struct resource crashk_low_res;
16
17int __init parse_crashkernel(char *cmdline, unsigned long long system_ram,
18 unsigned long long *crash_size, unsigned long long *crash_base,
19 unsigned long long *low_size, bool *high);
20
21#ifdef CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
22#ifndef DEFAULT_CRASH_KERNEL_LOW_SIZE
23#define DEFAULT_CRASH_KERNEL_LOW_SIZE (128UL << 20)
24#endif
25#ifndef CRASH_ALIGN
26#define CRASH_ALIGN SZ_2M
27#endif
28#ifndef CRASH_ADDR_LOW_MAX
29#define CRASH_ADDR_LOW_MAX SZ_4G
30#endif
31#ifndef CRASH_ADDR_HIGH_MAX
32#define CRASH_ADDR_HIGH_MAX memblock_end_of_DRAM()
33#endif
34
35void __init reserve_crashkernel_generic(unsigned long long crash_size,
36 unsigned long long crash_base,
37 unsigned long long crash_low_size,
38 bool high);
39#else
40static inline void __init reserve_crashkernel_generic(
41 unsigned long long crash_size,
42 unsigned long long crash_base,
43 unsigned long long crash_low_size,
44 bool high)
45{}
46#endif
47#endif /* LINUX_CRASH_RESERVE_H */