| 1 | /* Memory attributes support, for GDB. |
| 2 | |
| 3 | Copyright (C) 2001-2020 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 | enum mem_access_mode |
| 24 | { |
| 25 | MEM_NONE, /* Memory that is not physically present. */ |
| 26 | MEM_RW, /* read/write */ |
| 27 | MEM_RO, /* read only */ |
| 28 | MEM_WO, /* write only */ |
| 29 | |
| 30 | /* Read/write, but special steps are required to write to it. */ |
| 31 | MEM_FLASH |
| 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 | static mem_attrib unknown () |
| 56 | { |
| 57 | mem_attrib attrib; |
| 58 | |
| 59 | attrib.mode = MEM_NONE; |
| 60 | |
| 61 | return attrib; |
| 62 | } |
| 63 | |
| 64 | /* read/write, read-only, or write-only */ |
| 65 | enum mem_access_mode mode = MEM_RW; |
| 66 | |
| 67 | enum mem_access_width width = MEM_WIDTH_UNSPECIFIED; |
| 68 | |
| 69 | /* enables hardware breakpoints */ |
| 70 | int hwbreak = 0; |
| 71 | |
| 72 | /* enables host-side caching of memory region data */ |
| 73 | int cache = 0; |
| 74 | |
| 75 | /* Enables memory verification. After a write, memory is re-read |
| 76 | to verify that the write was successful. */ |
| 77 | int verify = 0; |
| 78 | |
| 79 | /* Block size. Only valid if mode == MEM_FLASH. */ |
| 80 | int blocksize = -1; |
| 81 | }; |
| 82 | |
| 83 | struct mem_region |
| 84 | { |
| 85 | /* Create a mem_region with default attributes. */ |
| 86 | |
| 87 | mem_region (CORE_ADDR lo_, CORE_ADDR hi_) |
| 88 | : lo (lo_), hi (hi_) |
| 89 | {} |
| 90 | |
| 91 | /* Create a mem_region with access mode MODE_, but otherwise default |
| 92 | attributes. */ |
| 93 | |
| 94 | mem_region (CORE_ADDR lo_, CORE_ADDR hi_, mem_access_mode mode_) |
| 95 | : lo (lo_), hi (hi_) |
| 96 | { |
| 97 | attrib.mode = mode_; |
| 98 | } |
| 99 | |
| 100 | /* Create a mem_region with attributes ATTRIB_. */ |
| 101 | |
| 102 | mem_region (CORE_ADDR lo_, CORE_ADDR hi_, const mem_attrib &attrib_) |
| 103 | : lo (lo_), hi (hi_), attrib (attrib_) |
| 104 | {} |
| 105 | |
| 106 | bool operator< (const mem_region &other) const |
| 107 | { |
| 108 | return this->lo < other.lo; |
| 109 | } |
| 110 | |
| 111 | /* Lowest address in the region. */ |
| 112 | CORE_ADDR lo; |
| 113 | /* Address past the highest address of the region. |
| 114 | If 0, upper bound is "infinity". */ |
| 115 | CORE_ADDR hi; |
| 116 | |
| 117 | /* Item number of this memory region. */ |
| 118 | int number = 0; |
| 119 | |
| 120 | /* Status of this memory region (enabled if true, otherwise |
| 121 | disabled). */ |
| 122 | bool enabled_p = true; |
| 123 | |
| 124 | /* Attributes for this region. */ |
| 125 | mem_attrib attrib; |
| 126 | }; |
| 127 | |
| 128 | extern struct mem_region *lookup_mem_region (CORE_ADDR); |
| 129 | |
| 130 | void invalidate_target_mem_regions (void); |
| 131 | |
| 132 | #endif /* MEMATTR_H */ |