Subversion Repositories openrisc_2011-10-31

/*  dbg_cp.h -- ARMulator debug interface:  ARM6 Instruction Emulator.

    Copyright (C) 1994 Advanced RISC Machines Ltd.

    This program is free software; you can redistribute it and/or modify

    it under the terms of the GNU General Public License as published by

    the Free Software Foundation; either version 2 of the License, or

    (at your option) any later version.

    This program is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License

    along with this program; if not, write to the Free Software

    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */

#ifndef Dbg_CP__h

#define Dbg_CP__h

#define Dbg_Access_Readable  1

#define Dbg_Access_Writable  2

#define Dbg_Access_CPDT      4  /* else CPRT */

typedef struct

{

  unsigned short rmin, rmax;

  /* a single description can be used for a range of registers with

     the same properties *accessed via CPDT instructions*

   */

  unsigned char nbytes;         /* size of register */

  unsigned char access;         /* see above (Access_xxx) */

  union

  {

    struct

    {

      /* CPDT instructions do not allow the coprocessor much freedom:

         only bit 22 ('N') and 12-15 ('CRd') are free for the

         coprocessor to use as it sees fit.  */

      unsigned char nbit;

      unsigned char rdbits;

    }

    cpdt;

    struct

    {

      /* CPRT instructions have much more latitude.  The bits fixed

         by the ARM are  24..31 (condition mask & opcode)

         20 (direction)

         8..15 (cpnum, arm register)

         4 (CPRT not CPDO)

         leaving 14 bits free to the coprocessor (fortunately

         falling within two bytes).  */

      unsigned char read_b0, read_b1, write_b0, write_b1;

    }

    cprt;

  }

  accessinst;

}

Dbg_CoProRegDesc;

struct Dbg_CoProDesc

{

  int entries;

  Dbg_CoProRegDesc regdesc[1 /* really nentries */ ];

};

#define Dbg_CoProDesc_Size(n) (sizeof(struct Dbg_CoProDesc) + (n-1)*sizeof(Dbg_CoProRegDesc))

#endif