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 2 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, write to the Free Software
  16     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
  17
  18 #ifndef Dbg_CP__h
  19
  20 #define Dbg_CP__h
  21
  22 #define Dbg_Access_Readable  1
  23 #define Dbg_Access_Writable  2
  24 #define Dbg_Access_CPDT      4  /* else CPRT */
  25
  26 typedef struct
  27 {
  28   unsigned short rmin, rmax;
  29   /* a single description can be used for a range of registers with
  30      the same properties *accessed via CPDT instructions*
  31    */
  32   unsigned char nbytes;         /* size of register */
  33   unsigned char access;         /* see above (Access_xxx) */
  34   union
  35   {
  36     struct
  37     {
  38       /* CPDT instructions do not allow the coprocessor much freedom:
  39          only bit 22 ('N') and 12-15 ('CRd') are free for the
  40          coprocessor to use as it sees fit.  */
  41       unsigned char nbit;
  42       unsigned char rdbits;
  43     }
  44     cpdt;
  45     struct
  46     {
  47       /* CPRT instructions have much more latitude.  The bits fixed
  48          by the ARM are  24..31 (condition mask & opcode)
  49          20 (direction)
  50          8..15 (cpnum, arm register)
  51          4 (CPRT not CPDO)
  52          leaving 14 bits free to the coprocessor (fortunately
  53          falling within two bytes).  */
  54       unsigned char read_b0, read_b1, write_b0, write_b1;
  55     }
  56     cprt;
  57   }
  58   accessinst;
  59 }
  60 Dbg_CoProRegDesc;
  61
  62 struct Dbg_CoProDesc
  63 {
  64   int entries;
  65   Dbg_CoProRegDesc regdesc[1 /* really nentries */ ];
  66 };
  67
  68 #define Dbg_CoProDesc_Size(n) (sizeof(struct Dbg_CoProDesc) + (n-1)*sizeof(Dbg_CoProRegDesc))
  69
  70 #endif