gdb/memattr.h

   1 /* Memory attributes support, for GDB.
   2
   3    Copyright (C) 2001, 2006 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_RW,                       /* read/write */
  30   MEM_RO,                       /* read only */
  31   MEM_WO                        /* write only */
  32 };
  33
  34 enum mem_access_width
  35 {
  36   MEM_WIDTH_UNSPECIFIED,
  37   MEM_WIDTH_8,                  /*  8 bit accesses */
  38   MEM_WIDTH_16,                 /* 16  "      "    */
  39   MEM_WIDTH_32,                 /* 32  "      "    */
  40   MEM_WIDTH_64                  /* 64  "      "    */
  41 };
  42
  43 /* The set of all attributes that can be set for a memory region.
  44
  45    This structure was created so that memory attributes can be passed
  46    to target_ functions without exposing the details of memory region
  47    list, which would be necessary if these fields were simply added to
  48    the mem_region structure.
  49
  50    FIXME: It would be useful if there was a mechanism for targets to
  51    add their own attributes.  For example, the number of wait states. */
  52
  53 struct mem_attrib
  54 {
  55   /* read/write, read-only, or write-only */
  56   enum mem_access_mode mode;
  57
  58   enum mem_access_width width;
  59
  60   /* enables hardware breakpoints */
  61   int hwbreak;
  62
  63   /* enables host-side caching of memory region data */
  64   int cache;
  65
  66   /* enables memory verification.  after a write, memory is re-read
  67      to verify that the write was successful. */
  68   int verify;
  69 };
  70
  71 struct mem_region
  72 {
  73   CORE_ADDR lo;
  74   CORE_ADDR hi;
  75
  76   /* Item number of this memory region. */
  77   int number;
  78
  79   /* Status of this memory region (enabled if non-zero, otherwise disabled) */
  80   int enabled_p;
  81
  82   /* Attributes for this region */
  83   struct mem_attrib attrib;
  84 };
  85
  86 /* Declare a vector type for a group of mem_region structures.  The
  87    typedef is necessary because vec.h can not handle a struct tag.
  88    Except during construction, these vectors are kept sorted.  */
  89 typedef struct mem_region mem_region_s;
  90 DEF_VEC_O(mem_region_s);
  91
  92 extern struct mem_region *lookup_mem_region(CORE_ADDR);
  93
  94 #endif  /* MEMATTR_H */