| /* 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 */ |