73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
/* memattr.h */
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#ifndef MEMATTR_H
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#define MEMATTR_H
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enum mem_access_mode
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{
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MEM_RW, /* read/write */
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MEM_RO, /* read only */
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MEM_WO, /* write only */
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};
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enum mem_access_width
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{
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MEM_WIDTH_UNSPECIFIED,
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MEM_WIDTH_8, /* 8 bit accesses */
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MEM_WIDTH_16, /* 16 " " */
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MEM_WIDTH_32, /* 32 " " */
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MEM_WIDTH_64 /* 64 " " */
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};
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/* The set of all attributes that can be set for a memory region.
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This structure was created so that memory attributes can be passed
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to target_ functions without exposing the details of memory region
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list, which would be necessary if these fields were simply added to
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the mem_region structure.
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FIXME: It would be useful if there was a mechanism for targets to
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add their own attributes. For example, the number of wait states. */
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struct mem_attrib
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{
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/* read/write, read-only, or write-only */
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enum mem_access_mode mode;
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enum mem_access_width width;
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/* enables hardware breakpoints */
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int hwbreak;
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/* enables host-side caching of memory region data */
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int cache;
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/* enables memory verification. after a write, memory is re-read
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to verify that the write was successful. */
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int verify;
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};
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struct mem_region
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{
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/* FIXME: memory regions are stored in an unsorted singly-linked
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list. This probably won't scale to handle hundreds of memory
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regions --- that many could be needed to describe the allowed
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access modes for memory mapped i/o device registers. */
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struct mem_region *next;
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CORE_ADDR lo;
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CORE_ADDR hi;
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/* Item number of this memory region. */
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int number;
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/* Status of this memory region (enabled or disabled) */
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int status;
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/* Attributes for this region */
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struct mem_attrib attrib;
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};
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extern struct mem_region *lookup_mem_region(CORE_ADDR);
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#endif /* MEMATTR_H */
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