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/* Memory attributes support, for GDB.
Copyright (C) 2001-2017 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
#include "vec.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
{
/* read/write, read-only, or write-only */
enum mem_access_mode mode;
enum mem_access_width width;
/* enables hardware breakpoints */
int hwbreak;
/* enables host-side caching of memory region data */
int cache;
/* Enables memory verification. After a write, memory is re-read
to verify that the write was successful. */
int verify;
/* Block size. Only valid if mode == MEM_FLASH. */
int blocksize;
};
struct mem_region
{
/* 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;
/* Status of this memory region (enabled if non-zero, otherwise
disabled). */
int enabled_p;
/* Attributes for this region. */
struct mem_attrib attrib;
};
/* Declare a vector type for a group of mem_region structures. The
typedef is necessary because vec.h can not handle a struct tag.
Except during construction, these vectors are kept sorted. */
typedef struct mem_region mem_region_s;
DEF_VEC_O(mem_region_s);
extern struct mem_region *lookup_mem_region(CORE_ADDR);
void invalidate_target_mem_regions (void);
void mem_region_init (struct mem_region *);
int mem_region_cmp (const void *, const void *);
#endif /* MEMATTR_H */
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