include/asm-ia64/diskdump.h

   1 #ifndef _ASM_IA64_DISKDUMP_H
   2 #define _ASM_IA64_DISKDUMP_H
   3
   4 /*
   5  * linux/include/asm-ia64/diskdump.h
   6  *
   7  * Copyright (c) 2004 FUJITSU LIMITED
   8  * Copyright (c) 2003 Red Hat, Inc. All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2, or (at your option)
  13  * any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23  *
  24  */
  25
  26 #ifdef __KERNEL__
  27
  28 #include <asm/crashdump.h>
  29
  30
  31 const static int platform_supports_diskdump = 1;
  32
  33 struct disk_dump_sub_header {
  34         elf_gregset_t            elf_regs;
  35         struct switch_stack     *sw[NR_CPUS];
  36 };
  37
  38 #define size_of_sub_header()    ((sizeof(struct disk_dump_sub_header) + PAGE_SIZE - 1) / DUMP_BLOCK_SIZE)
  39
  40 #define write_sub_header() \
  41 ({                                                              \
  42         int ret;                                                \
  43         struct unw_frame_info *info = platform_arg;             \
  44                                                                 \
  45         ia64_do_copy_regs(info, &dump_sub_header.elf_regs);     \
  46         dump_sub_header.sw[smp_processor_id()] = info->sw;      \
  47         clear_page(scratch);                                    \
  48         memcpy(scratch, &dump_sub_header, sizeof(dump_sub_header));\
  49                                                                 \
  50         if ((ret = write_blocks(dump_part, 2, scratch, 1)) >= 0)\
  51                 ret = 1; /* size of sub header in page */;      \
  52         ret;                                                    \
  53 })
  54
  55 #define platform_freeze_cpu()                                   \
  56 {                                                               \
  57         unw_init_running(ia64_freeze_cpu,                       \
  58                 &dump_sub_header.sw[smp_processor_id()]);       \
  59 }
  60
  61 #endif /* __KERNEL__ */
  62
  63 #endif /* _ASM_IA64_DISKDUMP_H */