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/* MIPS-dependent portions of the RPC protocol

   used with a VxWorks target

   Contributed by Wind River Systems.

   This file is part of GDB.

   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., 59 Temple Place - Suite 330,

   Boston, MA 02111-1307, USA.  */

#include <stdio.h>

#include "defs.h"

#include "vx-share/regPacket.h"

#include "frame.h"

#include "inferior.h"

#include "target.h"

#include "gdbcore.h"

#include "command.h"

#include "symtab.h"

#include "symfile.h"            /* for struct complaint */

#include "regcache.h"

#include "gdb_string.h"

#include <errno.h>

#include <fcntl.h>

#include <sys/types.h>

#include <sys/time.h>

#include <sys/socket.h>

#include <rpc/rpc.h>

#include <sys/time.h>           /* UTek's <rpc/rpc.h> doesn't #incl this */

#include <netdb.h>

#include "vx-share/ptrace.h"

#include "vx-share/xdr_ptrace.h"

#include "vx-share/xdr_ld.h"

#include "vx-share/xdr_rdb.h"

#include "vx-share/dbgRpcLib.h"

/* get rid of value.h if possible */

#include <value.h>

#include <symtab.h>

/* Flag set if target has fpu */

extern int target_has_fp;

/* Generic register read/write routines in remote-vx.c.  */

extern void net_read_registers ();

extern void net_write_registers ();

/* Read a register or registers from the VxWorks target.

   REGNO is the register to read, or -1 for all; currently,

   it is ignored.  FIXME look at regno to improve efficiency.  */

void

vx_read_register (int regno)

{

  char mips_greg_packet[MIPS_GREG_PLEN];

  char mips_fpreg_packet[MIPS_FPREG_PLEN];

  /* Get general-purpose registers.  */

  net_read_registers (mips_greg_packet, MIPS_GREG_PLEN, PTRACE_GETREGS);

  /* this code copies the registers obtained by RPC

     stored in a structure(s) like this :

     Register(s)                Offset(s)

     gp 0-31                    0x00

     hi                 0x80

     lo                 0x84

     sr                 0x88

     pc                 0x8c

     into a stucture like this:

     0x00       GP 0-31

     0x80       SR

     0x84       LO

     0x88       HI

     0x8C       BAD             --- Not available currently

     0x90       CAUSE           --- Not available currently

     0x94       PC

     0x98       FP 0-31

     0x118      FCSR

     0x11C      FIR             --- Not available currently

     0x120      FP              --- Not available currently

     structure is 0x124 (292) bytes in length */

  /* Copy the general registers.  */

  bcopy (&mips_greg_packet[MIPS_R_GP0], &registers[0], 32 * MIPS_GREG_SIZE);

  /* Copy SR, LO, HI, and PC.  */

  bcopy (&mips_greg_packet[MIPS_R_SR],

         &registers[REGISTER_BYTE (PS_REGNUM)], MIPS_GREG_SIZE);

  bcopy (&mips_greg_packet[MIPS_R_LO],

         &registers[REGISTER_BYTE (LO_REGNUM)], MIPS_GREG_SIZE);

  bcopy (&mips_greg_packet[MIPS_R_HI],

         &registers[REGISTER_BYTE (HI_REGNUM)], MIPS_GREG_SIZE);

  bcopy (&mips_greg_packet[MIPS_R_PC],

         &registers[REGISTER_BYTE (PC_REGNUM)], MIPS_GREG_SIZE);

  /* If the target has floating point registers, fetch them.

     Otherwise, zero the floating point register values in

     registers[] for good measure, even though we might not

     need to.  */

  if (target_has_fp)

    {

      net_read_registers (mips_fpreg_packet, MIPS_FPREG_PLEN,

                          PTRACE_GETFPREGS);

      /* Copy the floating point registers.  */

      bcopy (&mips_fpreg_packet[MIPS_R_FP0],

             &registers[REGISTER_BYTE (FP0_REGNUM)],

             REGISTER_RAW_SIZE (FP0_REGNUM) * 32);

      /* Copy the floating point control/status register (fpcsr).  */

      bcopy (&mips_fpreg_packet[MIPS_R_FPCSR],

             &registers[REGISTER_BYTE (FCRCS_REGNUM)],

             REGISTER_RAW_SIZE (FCRCS_REGNUM));

    }

  else

    {

      bzero ((char *) &registers[REGISTER_BYTE (FP0_REGNUM)],

             REGISTER_RAW_SIZE (FP0_REGNUM) * 32);

      bzero ((char *) &registers[REGISTER_BYTE (FCRCS_REGNUM)],

             REGISTER_RAW_SIZE (FCRCS_REGNUM));

    }

  /* Mark the register cache valid.  */

  registers_fetched ();

}

/* Store a register or registers into the VxWorks target.

   REGNO is the register to store, or -1 for all; currently,

   it is ignored.  FIXME look at regno to improve efficiency.  */

vx_write_register (int regno)

{

  char mips_greg_packet[MIPS_GREG_PLEN];

  char mips_fpreg_packet[MIPS_FPREG_PLEN];

  /* Store general registers.  */

  bcopy (&registers[0], &mips_greg_packet[MIPS_R_GP0], 32 * MIPS_GREG_SIZE);

  /* Copy SR, LO, HI, and PC.  */

  bcopy (&registers[REGISTER_BYTE (PS_REGNUM)],

         &mips_greg_packet[MIPS_R_SR], MIPS_GREG_SIZE);

  bcopy (&registers[REGISTER_BYTE (LO_REGNUM)],

         &mips_greg_packet[MIPS_R_LO], MIPS_GREG_SIZE);

  bcopy (&registers[REGISTER_BYTE (HI_REGNUM)],

         &mips_greg_packet[MIPS_R_HI], MIPS_GREG_SIZE);

  bcopy (&registers[REGISTER_BYTE (PC_REGNUM)],

         &mips_greg_packet[MIPS_R_PC], MIPS_GREG_SIZE);

  net_write_registers (mips_greg_packet, MIPS_GREG_PLEN, PTRACE_SETREGS);

  /* Store floating point registers if the target has them.  */

  if (target_has_fp)

    {

      /* Copy the floating point data registers.  */

      bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)],

             &mips_fpreg_packet[MIPS_R_FP0],

             REGISTER_RAW_SIZE (FP0_REGNUM) * 32);

      /* Copy the floating point control/status register (fpcsr).  */

      bcopy (&registers[REGISTER_BYTE (FCRCS_REGNUM)],

             &mips_fpreg_packet[MIPS_R_FPCSR],

             REGISTER_RAW_SIZE (FCRCS_REGNUM));

      net_write_registers (mips_fpreg_packet, MIPS_FPREG_PLEN,

                           PTRACE_SETFPREGS);

    }

}