include/asm-x86_64/kexec.h

   1 #ifndef _X86_64_KEXEC_H
   2 #define _X86_64_KEXEC_H
   3
   4 #include <asm/page.h>
   5 #include <asm/proto.h>
   6
   7 /*
   8  * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
   9  * I.e. Maximum page that is mapped directly into kernel memory,
  10  * and kmap is not required.
  11  *
  12  * So far x86_64 is limited to 40 physical address bits.
  13  */
  14
  15 /* Maximum physical address we can use pages from */
  16 #define KEXEC_SOURCE_MEMORY_LIMIT      (0xFFFFFFFFFFUL)
  17 /* Maximum address we can reach in physical address mode */
  18 #define KEXEC_DESTINATION_MEMORY_LIMIT (0xFFFFFFFFFFUL)
  19 /* Maximum address we can use for the control pages */
  20 #define KEXEC_CONTROL_MEMORY_LIMIT     (0xFFFFFFFFFFUL)
  21
  22 /* Allocate one page for the pdp and the second for the code */
  23 #define KEXEC_CONTROL_CODE_SIZE  (4096UL + 4096UL)
  24
  25 /* The native architecture */
  26 #define KEXEC_ARCH KEXEC_ARCH_X86_64
  27
  28 #define MAX_NOTE_BYTES 1024
  29 typedef u32 note_buf_t[MAX_NOTE_BYTES/4];
  30
  31 extern note_buf_t crash_notes[];
  32
  33 #endif /* _X86_64_KEXEC_H */