1 /* Memory attributes support, for GDB. 2 3 Copyright (C) 2001, 2006, 2007, 2008, 2009, 2010 4 Free Software Foundation, Inc. 5 6 This file is part of GDB. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 20 21 #ifndef MEMATTR_H 22 #define MEMATTR_H 23 24 #include "vec.h" 25 26 enum mem_access_mode 27 { 28 MEM_NONE, /* Memory that is not physically present. */ 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 /* Lowest address in the region. */ 80 CORE_ADDR lo; 81 /* Address past the highest address of the region. 82 If 0, upper bound is "infinity". */ 83 CORE_ADDR hi; 84 85 /* Item number of this memory region. */ 86 int number; 87 88 /* Status of this memory region (enabled if non-zero, otherwise disabled) */ 89 int enabled_p; 90 91 /* Attributes for this region */ 92 struct mem_attrib attrib; 93 }; 94 95 /* Declare a vector type for a group of mem_region structures. The 96 typedef is necessary because vec.h can not handle a struct tag. 97 Except during construction, these vectors are kept sorted. */ 98 typedef struct mem_region mem_region_s; 99 DEF_VEC_O(mem_region_s); 100 101 extern struct mem_region *lookup_mem_region(CORE_ADDR); 102 103 void invalidate_target_mem_regions (void); 104 105 void mem_region_init (struct mem_region *); 106 107 int mem_region_cmp (const void *, const void *); 108 109 #endif /* MEMATTR_H */ 110