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 3 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, see <http://www.gnu.org/licenses/>. */ 19 20#ifndef MEMATTR_H 21#define MEMATTR_H 22 23#include "vec.h" 24 25enum mem_access_mode 26{ 27 MEM_NONE, /* Memory that is not physically present. */ 28 MEM_RW, /* read/write */ 29 MEM_RO, /* read only */ 30 MEM_WO, /* write only */ 31 32 /* Read/write, but special steps are required to write to it. */ 33 MEM_FLASH 34}; 35 36enum mem_access_width 37{ 38 MEM_WIDTH_UNSPECIFIED, 39 MEM_WIDTH_8, /* 8 bit accesses */ 40 MEM_WIDTH_16, /* 16 " " */ 41 MEM_WIDTH_32, /* 32 " " */ 42 MEM_WIDTH_64 /* 64 " " */ 43}; 44 45/* The set of all attributes that can be set for a memory region. 46 47 This structure was created so that memory attributes can be passed 48 to target_ functions without exposing the details of memory region 49 list, which would be necessary if these fields were simply added to 50 the mem_region structure. 51 52 FIXME: It would be useful if there was a mechanism for targets to 53 add their own attributes. For example, the number of wait states. */ 54 55struct mem_attrib 56{ 57 /* read/write, read-only, or write-only */ 58 enum mem_access_mode mode; 59 60 enum mem_access_width width; 61 62 /* enables hardware breakpoints */ 63 int hwbreak; 64 65 /* enables host-side caching of memory region data */ 66 int cache; 67 68 /* enables memory verification. after a write, memory is re-read 69 to verify that the write was successful. */ 70 int verify; 71 72 /* Block size. Only valid if mode == MEM_FLASH. */ 73 int blocksize; 74}; 75 76struct mem_region 77{ 78 /* Lowest address in the region. */ 79 CORE_ADDR lo; 80 /* Address past the highest address of the region. 81 If 0, upper bound is "infinity". */ 82 CORE_ADDR hi; 83 84 /* Item number of this memory region. */ 85 int number; 86 87 /* Status of this memory region (enabled if non-zero, otherwise disabled) */ 88 int enabled_p; 89 90 /* Attributes for this region */ 91 struct mem_attrib attrib; 92}; 93 94/* Declare a vector type for a group of mem_region structures. The 95 typedef is necessary because vec.h can not handle a struct tag. 96 Except during construction, these vectors are kept sorted. */ 97typedef struct mem_region mem_region_s; 98DEF_VEC_O(mem_region_s); 99 100extern struct mem_region *lookup_mem_region(CORE_ADDR); 101 102void invalidate_target_mem_regions (void); 103 104void mem_region_init (struct mem_region *); 105 106int mem_region_cmp (const void *, const void *); 107 108#endif /* MEMATTR_H */ 109