1 /* Memory attributes support, for GDB. 2 3 Copyright (C) 2001-2015 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 25 enum 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 36 enum 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 55 struct 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 76 struct 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 88 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