sim/arm/dbg_cp.h

   1 /*  dbg_cp.h -- ARMulator debug interface:  ARM6 Instruction Emulator.
   2     Copyright (C) 1994 Advanced RISC Machines Ltd.
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 3 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, see <http://www.gnu.org/licenses/>. */
  16
  17 #ifndef Dbg_CP__h
  18
  19 #define Dbg_CP__h
  20
  21 #define Dbg_Access_Readable  1
  22 #define Dbg_Access_Writable  2
  23 #define Dbg_Access_CPDT      4  /* else CPRT */
  24
  25 typedef struct
  26 {
  27   unsigned short rmin, rmax;
  28   /* a single description can be used for a range of registers with
  29      the same properties *accessed via CPDT instructions*
  30    */
  31   unsigned char nbytes;         /* size of register */
  32   unsigned char access;         /* see above (Access_xxx) */
  33   union
  34   {
  35     struct
  36     {
  37       /* CPDT instructions do not allow the coprocessor much freedom:
  38          only bit 22 ('N') and 12-15 ('CRd') are free for the
  39          coprocessor to use as it sees fit.  */
  40       unsigned char nbit;
  41       unsigned char rdbits;
  42     }
  43     cpdt;
  44     struct
  45     {
  46       /* CPRT instructions have much more latitude.  The bits fixed
  47          by the ARM are  24..31 (condition mask & opcode)
  48          20 (direction)
  49          8..15 (cpnum, arm register)
  50          4 (CPRT not CPDO)
  51          leaving 14 bits free to the coprocessor (fortunately
  52          falling within two bytes).  */
  53       unsigned char read_b0, read_b1, write_b0, write_b1;
  54     }
  55     cprt;
  56   }
  57   accessinst;
  58 }
  59 Dbg_CoProRegDesc;
  60
  61 struct Dbg_CoProDesc
  62 {
  63   int entries;
  64   Dbg_CoProRegDesc regdesc[1 /* really nentries */ ];
  65 };
  66
  67 #define Dbg_CoProDesc_Size(n) (sizeof(struct Dbg_CoProDesc) + (n-1)*sizeof(Dbg_CoProRegDesc))
  68
  69 #endif