include/linux/crash_reserve.h

   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  */
  14 extern struct resource crashk_res;
  15 extern struct resource crashk_low_res;
  16
  17 int __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
  35 void __init reserve_crashkernel_generic(char *cmdline,
  36                 unsigned long long crash_size,
  37                 unsigned long long crash_base,
  38                 unsigned long long crash_low_size,
  39                 bool high);
  40 #else
  41 static inline void __init reserve_crashkernel_generic(char *cmdline,
  42                 unsigned long long crash_size,
  43                 unsigned long long crash_base,
  44                 unsigned long long crash_low_size,
  45                 bool high)
  46 {}
  47 #endif
  48 #endif /* LINUX_CRASH_RESERVE_H */