| /* Memory attributes support, for GDB. |
| |
| Copyright (C) 2001-2024 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef MEMATTR_H |
| #define MEMATTR_H |
| |
| enum mem_access_mode |
| { |
| MEM_NONE, /* Memory that is not physically present. */ |
| MEM_RW, /* read/write */ |
| MEM_RO, /* read only */ |
| MEM_WO, /* write only */ |
| |
| /* Read/write, but special steps are required to write to it. */ |
| MEM_FLASH |
| }; |
| |
| enum mem_access_width |
| { |
| MEM_WIDTH_UNSPECIFIED, |
| MEM_WIDTH_8, /* 8 bit accesses */ |
| MEM_WIDTH_16, /* 16 " " */ |
| MEM_WIDTH_32, /* 32 " " */ |
| MEM_WIDTH_64 /* 64 " " */ |
| }; |
| |
| /* The set of all attributes that can be set for a memory region. |
| |
| This structure was created so that memory attributes can be passed |
| to target_ functions without exposing the details of memory region |
| list, which would be necessary if these fields were simply added to |
| the mem_region structure. |
| |
| FIXME: It would be useful if there was a mechanism for targets to |
| add their own attributes. For example, the number of wait states. */ |
| |
| struct mem_attrib |
| { |
| static mem_attrib unknown () |
| { |
| mem_attrib attrib; |
| |
| attrib.mode = MEM_NONE; |
| |
| return attrib; |
| } |
| |
| /* read/write, read-only, or write-only */ |
| enum mem_access_mode mode = MEM_RW; |
| |
| enum mem_access_width width = MEM_WIDTH_UNSPECIFIED; |
| |
| /* enables hardware breakpoints */ |
| int hwbreak = 0; |
| |
| /* enables host-side caching of memory region data */ |
| int cache = 0; |
| |
| /* Enables memory verification. After a write, memory is re-read |
| to verify that the write was successful. */ |
| int verify = 0; |
| |
| /* Block size. Only valid if mode == MEM_FLASH. */ |
| int blocksize = -1; |
| }; |
| |
| struct mem_region |
| { |
| /* Create a mem_region with default attributes. */ |
| |
| mem_region (CORE_ADDR lo_, CORE_ADDR hi_) |
| : lo (lo_), hi (hi_) |
| {} |
| |
| /* Create a mem_region with access mode MODE_, but otherwise default |
| attributes. */ |
| |
| mem_region (CORE_ADDR lo_, CORE_ADDR hi_, mem_access_mode mode_) |
| : lo (lo_), hi (hi_) |
| { |
| attrib.mode = mode_; |
| } |
| |
| /* Create a mem_region with attributes ATTRIB_. */ |
| |
| mem_region (CORE_ADDR lo_, CORE_ADDR hi_, const mem_attrib &attrib_) |
| : lo (lo_), hi (hi_), attrib (attrib_) |
| {} |
| |
| bool operator< (const mem_region &other) const |
| { |
| return this->lo < other.lo; |
| } |
| |
| /* Lowest address in the region. */ |
| CORE_ADDR lo; |
| /* Address past the highest address of the region. |
| If 0, upper bound is "infinity". */ |
| CORE_ADDR hi; |
| |
| /* Item number of this memory region. */ |
| int number = 0; |
| |
| /* Status of this memory region (enabled if true, otherwise |
| disabled). */ |
| bool enabled_p = true; |
| |
| /* Attributes for this region. */ |
| mem_attrib attrib; |
| }; |
| |
| extern struct mem_region *lookup_mem_region (CORE_ADDR); |
| |
| void invalidate_target_mem_regions (void); |
| |
| #endif /* MEMATTR_H */ |