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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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
26typedef 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}
60Dbg_CoProRegDesc;
61
62struct 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
71