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Linux kernel mirror (for testing)
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kernel
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linux
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;
16extern struct range crashk_cma_ranges[];
17#if defined(CONFIG_CMA) && defined(CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION)
18#define CRASHKERNEL_CMA
19#define CRASHKERNEL_CMA_RANGES_MAX 4
20extern int crashk_cma_cnt;
21#else
22#define crashk_cma_cnt 0
23#define CRASHKERNEL_CMA_RANGES_MAX 0
24#endif
25
26
27int __init parse_crashkernel(char *cmdline, unsigned long long system_ram,
28 unsigned long long *crash_size, unsigned long long *crash_base,
29 unsigned long long *low_size, unsigned long long *cma_size,
30 bool *high);
31
32void __init reserve_crashkernel_cma(unsigned long long cma_size);
33
34#ifdef CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
35#ifndef DEFAULT_CRASH_KERNEL_LOW_SIZE
36#define DEFAULT_CRASH_KERNEL_LOW_SIZE (128UL << 20)
37#endif
38#ifndef CRASH_ALIGN
39#define CRASH_ALIGN SZ_2M
40#endif
41#ifndef CRASH_ADDR_LOW_MAX
42#define CRASH_ADDR_LOW_MAX SZ_4G
43#endif
44#ifndef CRASH_ADDR_HIGH_MAX
45#define CRASH_ADDR_HIGH_MAX memblock_end_of_DRAM()
46#endif
47
48void __init reserve_crashkernel_generic(unsigned long long crash_size,
49 unsigned long long crash_base,
50 unsigned long long crash_low_size,
51 bool high);
52#else
53static inline void __init reserve_crashkernel_generic(
54 unsigned long long crash_size,
55 unsigned long long crash_base,
56 unsigned long long crash_low_size,
57 bool high)
58{}
59#endif
60#endif /* LINUX_CRASH_RESERVE_H */