gdb/memattr.h

   1 /* memattr.h */
   2 #ifndef MEMATTR_H
   3 #define MEMATTR_H
   4
   5 enum mem_access_mode
   6 {
   7   MEM_RW,                       /* read/write */
   8   MEM_RO,                       /* read only */
   9   MEM_WO                        /* write only */
  10 };
  11
  12 enum mem_access_width
  13 {
  14   MEM_WIDTH_UNSPECIFIED,
  15   MEM_WIDTH_8,                  /*  8 bit accesses */
  16   MEM_WIDTH_16,                 /* 16  "      "    */
  17   MEM_WIDTH_32,                 /* 32  "      "    */
  18   MEM_WIDTH_64                  /* 64  "      "    */
  19 };
  20
  21 /* The set of all attributes that can be set for a memory region.
  22
  23    This structure was created so that memory attributes can be passed
  24    to target_ functions without exposing the details of memory region
  25    list, which would be necessary if these fields were simply added to
  26    the mem_region structure.
  27
  28    FIXME: It would be useful if there was a mechanism for targets to
  29    add their own attributes.  For example, the number of wait states. */
  30
  31 struct mem_attrib
  32 {
  33   /* read/write, read-only, or write-only */
  34   enum mem_access_mode mode;
  35
  36   enum mem_access_width width;
  37
  38   /* enables hardware breakpoints */
  39   int hwbreak;
  40
  41   /* enables host-side caching of memory region data */
  42   int cache;
  43
  44   /* enables memory verification.  after a write, memory is re-read
  45      to verify that the write was successful. */
  46   int verify;
  47 };
  48
  49 struct mem_region
  50 {
  51   /* FIXME: memory regions are stored in an unsorted singly-linked
  52      list.  This probably won't scale to handle hundreds of memory
  53      regions --- that many could be needed to describe the allowed
  54      access modes for memory mapped i/o device registers. */
  55   struct mem_region *next;
  56
  57   CORE_ADDR lo;
  58   CORE_ADDR hi;
  59
  60   /* Item number of this memory region. */
  61   int number;
  62
  63   /* Status of this memory region (enabled or disabled) */
  64   int status;
  65
  66   /* Attributes for this region */
  67   struct mem_attrib attrib;
  68 };
  69
  70 extern struct mem_region *lookup_mem_region(CORE_ADDR);
  71
  72 #endif  /* MEMATTR_H */