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- /* Memory attributes support, for GDB.
- Copyright (C) 2001-2022 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 */
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