gdb/memattr.h

   1 /* Memory attributes support, for GDB.
   2
   3    Copyright (C) 2001, 2006, 2007 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20    Boston, MA 02110-1301, USA.  */
  21
  22 #ifndef MEMATTR_H
  23 #define MEMATTR_H
  24
  25 #include "vec.h"
  26
  27 enum mem_access_mode
  28 {
  29   MEM_NONE,                     /* Memory that is not physically present. */
  30   MEM_RW,                       /* read/write */
  31   MEM_RO,                       /* read only */
  32   MEM_WO,                       /* write only */
  33
  34   /* Read/write, but special steps are required to write to it.  */
  35   MEM_FLASH
  36 };
  37
  38 enum mem_access_width
  39 {
  40   MEM_WIDTH_UNSPECIFIED,
  41   MEM_WIDTH_8,                  /*  8 bit accesses */
  42   MEM_WIDTH_16,                 /* 16  "      "    */
  43   MEM_WIDTH_32,                 /* 32  "      "    */
  44   MEM_WIDTH_64                  /* 64  "      "    */
  45 };
  46
  47 /* The set of all attributes that can be set for a memory region.
  48
  49    This structure was created so that memory attributes can be passed
  50    to target_ functions without exposing the details of memory region
  51    list, which would be necessary if these fields were simply added to
  52    the mem_region structure.
  53
  54    FIXME: It would be useful if there was a mechanism for targets to
  55    add their own attributes.  For example, the number of wait states. */
  56
  57 struct mem_attrib
  58 {
  59   /* read/write, read-only, or write-only */
  60   enum mem_access_mode mode;
  61
  62   enum mem_access_width width;
  63
  64   /* enables hardware breakpoints */
  65   int hwbreak;
  66
  67   /* enables host-side caching of memory region data */
  68   int cache;
  69
  70   /* enables memory verification.  after a write, memory is re-read
  71      to verify that the write was successful. */
  72   int verify;
  73
  74   /* Block size.  Only valid if mode == MEM_FLASH.  */
  75   int blocksize;
  76 };
  77
  78 struct mem_region
  79 {
  80   /* Lowest address in the region.  */
  81   CORE_ADDR lo;
  82   /* Address past the highest address of the region.
  83      If 0, upper bound is "infinity".  */
  84   CORE_ADDR hi;
  85
  86   /* Item number of this memory region. */
  87   int number;
  88
  89   /* Status of this memory region (enabled if non-zero, otherwise disabled) */
  90   int enabled_p;
  91
  92   /* Attributes for this region */
  93   struct mem_attrib attrib;
  94 };
  95
  96 /* Declare a vector type for a group of mem_region structures.  The
  97    typedef is necessary because vec.h can not handle a struct tag.
  98    Except during construction, these vectors are kept sorted.  */
  99 typedef struct mem_region mem_region_s;
 100 DEF_VEC_O(mem_region_s);
 101
 102 extern struct mem_region *lookup_mem_region(CORE_ADDR);
 103
 104 void invalidate_target_mem_regions (void);
 105
 106 void mem_region_init (struct mem_region *);
 107
 108 int mem_region_cmp (const void *, const void *);
 109
 110 #endif  /* MEMATTR_H */