include/asm-s390/kexec.h

   1 /*
   2  * include/asm-s390/kexec.h
   3  *
   4  * (C) Copyright IBM Corp. 2005
   5  *
   6  * Author(s): Rolf Adelsberger <adelsberger@de.ibm.com>
   7  *
   8  */
   9
  10 #ifndef _S390_KEXEC_H
  11 #define _S390_KEXEC_H
  12
  13 #include <asm/page.h>
  14 #include <asm/processor.h>
  15 /*
  16  * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
  17  * I.e. Maximum page that is mapped directly into kernel memory,
  18  * and kmap is not required.
  19  */
  20
  21 /* Maximum physical address we can use pages from */
  22 #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
  23
  24 /* Maximum address we can reach in physical address mode */
  25 #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
  26
  27 /* Maximum address we can use for the control pages */
  28 /* Not more than 2GB */
  29 #define KEXEC_CONTROL_MEMORY_LIMIT (1<<31)
  30
  31 /* Allocate one page for the pdp and the second for the code */
  32 #define KEXEC_CONTROL_CODE_SIZE 4096
  33
  34 /* The native architecture */
  35 #define KEXEC_ARCH KEXEC_ARCH_S390
  36
  37 #define MAX_NOTE_BYTES 1024
  38
  39 /* Provide a dummy definition to avoid build failures. */
  40 static inline void crash_setup_regs(struct pt_regs *newregs,
  41                                         struct pt_regs *oldregs) { }
  42
  43 #endif /*_S390_KEXEC_H */