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/* memattr.h */
#ifndef MEMATTR_H
#define MEMATTR_H
enum mem_access_mode
{
MEM_RW, /* read/write */
MEM_RO, /* read only */
MEM_WO /* write only */
};
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;
};
struct mem_region
{
/* FIXME: memory regions are stored in an unsorted singly-linked
list. This probably won't scale to handle hundreds of memory
regions --- that many could be needed to describe the allowed
access modes for memory mapped i/o device registers. */
struct mem_region *next;
CORE_ADDR lo;
CORE_ADDR hi;
/* Item number of this memory region. */
int number;
/* Status of this memory region (enabled or disabled) */
int status;
/* Attributes for this region */
struct mem_attrib attrib;
};
extern struct mem_region *lookup_mem_region(CORE_ADDR);
#endif /* MEMATTR_H */
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