include/asm-ppc64/dump.h

   1 /*
   2  * Kernel header file for Linux crash dumps.
   3  *
   4  * Created by: Todd Inglett <tinglett@vnet.ibm.com>
   5  *
   6  * Copyright 2002 International Business Machines
   7  *
   8  * This code is released under version 2 of the GNU GPL.
   9  */
  10
  11 /* This header file holds the architecture specific crash dump header */
  12 #ifndef _ASM_DUMP_H
  13 #define _ASM_DUMP_H
  14
  15 /* necessary header files */
  16 #include <asm/ptrace.h>                          /* for pt_regs             */
  17 #include <linux/threads.h>
  18
  19 /* definitions */
  20 #define DUMP_ASM_MAGIC_NUMBER     0xdeaddeadULL  /* magic number            */
  21 #define DUMP_ASM_VERSION_NUMBER   0x1            /* version number          */
  22
  23
  24 /*
  25  * Structure: dump_header_asm_t
  26  *  Function: This is the header for architecture-specific stuff.  It
  27  *            follows right after the dump header.
  28  */
  29 typedef struct _dump_header_asm_s {
  30
  31         /* the dump magic number -- unique to verify dump is valid */
  32         uint64_t             dha_magic_number;
  33
  34         /* the version number of this dump */
  35         uint32_t             dha_version;
  36
  37         /* the size of this header (in case we can't read it) */
  38         uint32_t             dha_header_size;
  39
  40         /* the dump registers */
  41         struct pt_regs       dha_regs;
  42
  43         /* smp specific */
  44         uint32_t             dha_smp_num_cpus;
  45         int                  dha_dumping_cpu;
  46         struct pt_regs       dha_smp_regs[NR_CPUS];
  47         void *               dha_smp_current_task[NR_CPUS];
  48         void *               dha_stack[NR_CPUS];
  49 } dump_header_asm_t;
  50
  51 #ifdef __KERNEL__
  52 static inline void get_current_regs(struct pt_regs *regs)
  53 {
  54         __asm__ __volatile__ (
  55                 "std    0,0(%0)\n"
  56                 "std    1,8(%0)\n"
  57                 "std    2,16(%0)\n"
  58                 "std    3,24(%0)\n"
  59                 "std    4,32(%0)\n"
  60                 "std    5,40(%0)\n"
  61                 "std    6,48(%0)\n"
  62                 "std    7,56(%0)\n"
  63                 "std    8,64(%0)\n"
  64                 "std    9,72(%0)\n"
  65                 "std    10,80(%0)\n"
  66                 "std    11,88(%0)\n"
  67                 "std    12,96(%0)\n"
  68                 "std    13,104(%0)\n"
  69                 "std    14,112(%0)\n"
  70                 "std    15,120(%0)\n"
  71                 "std    16,128(%0)\n"
  72                 "std    17,136(%0)\n"
  73                 "std    18,144(%0)\n"
  74                 "std    19,152(%0)\n"
  75                 "std    20,160(%0)\n"
  76                 "std    21,168(%0)\n"
  77                 "std    22,176(%0)\n"
  78                 "std    23,184(%0)\n"
  79                 "std    24,192(%0)\n"
  80                 "std    25,200(%0)\n"
  81                 "std    26,208(%0)\n"
  82                 "std    27,216(%0)\n"
  83                 "std    28,224(%0)\n"
  84                 "std    29,232(%0)\n"
  85                 "std    30,240(%0)\n"
  86                 "std    31,248(%0)\n"
  87                 "mfmsr  0\n"
  88                 "std    0, 264(%0)\n"
  89                 "mfctr  0\n"
  90                 "std    0, 280(%0)\n"
  91                 "mflr   0\n"
  92                 "std    0, 288(%0)\n"
  93                 "bl     1f\n"
  94         "1:      mflr   5\n"
  95                 "std    5, 256(%0)\n"
  96                 "mtlr   0\n"
  97                 "mfxer  0\n"
  98                 "std    0, 296(%0)\n"
  99                               : : "b" (&regs));
 100 }
 101
 102 extern volatile int dump_in_progress;
 103 extern dump_header_asm_t dump_header_asm;
 104
 105 #ifdef CONFIG_SMP
 106 extern void dump_send_ipi(int (*dump_ipi_callback)(struct pt_regs *));
 107 #else
 108 #define dump_send_ipi()
 109 #endif
 110 #endif /* __KERNEL__ */
 111
 112 #endif /* _ASM_DUMP_H */