arch/powerpc/include/asm/phyp_dump.h

   1 /*
   2  * Hypervisor-assisted dump
   3  *
   4  * Linas Vepstas, Manish Ahuja 2008
   5  * Copyright 2008 IBM Corp.
   6  *
   7  *      This program is free software; you can redistribute it and/or
   8  *      modify it under the terms of the GNU General Public License
   9  *      as published by the Free Software Foundation; either version
  10  *      2 of the License, or (at your option) any later version.
  11  */
  12
  13 #ifndef _PPC64_PHYP_DUMP_H
  14 #define _PPC64_PHYP_DUMP_H
  15
  16 #ifdef CONFIG_PHYP_DUMP
  17
  18 /* The RMR region will be saved for later dumping
  19  * whenever the kernel crashes. Set this to 256MB. */
  20 #define PHYP_DUMP_RMR_START 0x0
  21 #define PHYP_DUMP_RMR_END   (1UL<<28)
  22
  23 struct phyp_dump {
  24         /* Memory that is reserved during very early boot. */
  25         unsigned long init_reserve_start;
  26         unsigned long init_reserve_size;
  27         /* cmd line options during boot */
  28         unsigned long reserve_bootvar;
  29         unsigned long phyp_dump_at_boot;
  30         /* Check status during boot if dump supported, active & present*/
  31         unsigned long phyp_dump_configured;
  32         unsigned long phyp_dump_is_active;
  33         /* store cpu & hpte size */
  34         unsigned long cpu_state_size;
  35         unsigned long hpte_region_size;
  36         /* previous scratch area values */
  37         unsigned long reserved_scratch_addr;
  38         unsigned long reserved_scratch_size;
  39 };
  40
  41 extern struct phyp_dump *phyp_dump_info;
  42
  43 int early_init_dt_scan_phyp_dump(unsigned long node,
  44                 const char *uname, int depth, void *data);
  45
  46 #endif /* CONFIG_PHYP_DUMP */
  47 #endif /* _PPC64_PHYP_DUMP_H */