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., 675 Mass Ave, Cambridge, MA 02139, 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     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        struct { /* CPDT instructions do not allow the coprocessor much freedom:
  35                    only bit 22 ('N') and 12-15 ('CRd') are free for the
  36                    coprocessor to use as it sees fit.
  37                  */
  38                 unsigned char nbit;
  39                 unsigned char rdbits;
  40               } cpdt;
  41        struct { /* CPRT instructions have much more latitude.  The bits fixed
  42                    by the ARM are  24..31 (condition mask & opcode)
  43                                    20 (direction)
  44                                    8..15 (cpnum, arm register)
  45                                    4 (CPRT not CPDO)
  46                    leaving 14 bits free to the coprocessor (fortunately
  47                    falling within two bytes).
  48                  */
  49                 unsigned char read_b0, read_b1,
  50                               write_b0, write_b1;
  51               } cprt;
  52     } accessinst;
  53 } Dbg_CoProRegDesc;
  54
  55 struct Dbg_CoProDesc {
  56     int entries;
  57     Dbg_CoProRegDesc regdesc[1/* really nentries */];
  58 };
  59
  60 #define Dbg_CoProDesc_Size(n) (sizeof(struct Dbg_CoProDesc) + (n-1)*sizeof(Dbg_CoProRegDesc))
  61
  62 #endif