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   /* Read/write, but special steps are required to write to it.  */
  34   MEM_FLASH
  35 };
  36
  37 enum mem_access_width
  38 {
  39   MEM_WIDTH_UNSPECIFIED,
  40   MEM_WIDTH_8,                  /*  8 bit accesses */
  41   MEM_WIDTH_16,                 /* 16  "      "    */
  42   MEM_WIDTH_32,                 /* 32  "      "    */
  43   MEM_WIDTH_64                  /* 64  "      "    */
  44 };
  45
  46 /* The set of all attributes that can be set for a memory region.
  47
  48    This structure was created so that memory attributes can be passed
  49    to target_ functions without exposing the details of memory region
  50    list, which would be necessary if these fields were simply added to
  51    the mem_region structure.
  52
  53    FIXME: It would be useful if there was a mechanism for targets to
  54    add their own attributes.  For example, the number of wait states. */
  55
  56 struct mem_attrib
  57 {
  58   /* read/write, read-only, or write-only */
  59   enum mem_access_mode mode;
  60
  61   enum mem_access_width width;
  62
  63   /* enables hardware breakpoints */
  64   int hwbreak;
  65
  66   /* enables host-side caching of memory region data */
  67   int cache;
  68
  69   /* enables memory verification.  after a write, memory is re-read
  70      to verify that the write was successful. */
  71   int verify;
  72
  73   /* Block size.  Only valid if mode == MEM_FLASH.  */
  74   int blocksize;
  75 };
  76
  77 struct mem_region
  78 {
  79   CORE_ADDR lo;
  80   CORE_ADDR hi;
  81
  82   /* Item number of this memory region. */
  83   int number;
  84
  85   /* Status of this memory region (enabled if non-zero, otherwise disabled) */
  86   int enabled_p;
  87
  88   /* Attributes for this region */
  89   struct mem_attrib attrib;
  90 };
  91
  92 /* Declare a vector type for a group of mem_region structures.  The
  93    typedef is necessary because vec.h can not handle a struct tag.
  94    Except during construction, these vectors are kept sorted.  */
  95 typedef struct mem_region mem_region_s;
  96 DEF_VEC_O(mem_region_s);
  97
  98 extern struct mem_region *lookup_mem_region(CORE_ADDR);
  99
 100 void invalidate_target_mem_regions (void);
 101
 102 void mem_region_init (struct mem_region *);
 103
 104 int mem_region_cmp (const void *, const void *);
 105
 106 #endif  /* MEMATTR_H */