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//==========================================================================

//

//      arm-mon.c

//

//      Support code to extend the generic monitor code to support

//      ARM(R) processors.

//

//==========================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

//

// eCos is free software; you can redistribute it and/or modify it under

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// 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

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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

//

// As a special exception, if other files instantiate templates or use macros

// or inline functions from this file, or you compile this file and link it

// with other works to produce a work based on this file, this file does not

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// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

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// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    

// Contributors: gthomas

// Date:         1999-10-20

// Purpose:      Support code to extend the generic monitor code to support

//               ARM(R) processors.

// Description:  Further board specific support is in other files.

//               This file contains:

//                 register names lookup table

//

//               Empty Stubs:

//                 Interval timer - This should really belong to the application

//                 operating system.

//

//               Should not contain:

//                 low level uart getchar and putchar functions

//                 delay function to support uart

//

//               ARM is a Registered Trademark of Advanced RISC Machines

//               Limited.

//               Other Brands and Trademarks are the property of their

//               respective owners.               

//

//####DESCRIPTIONEND####

//

//=========================================================================

#include <setjmp.h>

#include <bsp/bsp.h>

#include <bsp/cpu.h>

#ifdef DISASSEMBLER

#include <dis-asm.h>

#endif

#include "cpu_info.h"

#include "monitor.h"

/* This module is required to provide many of the services defined

   in tservice.h */

static char *apcs_names[] = {

  "a1", "a2", "a3", "a4",

  "v1", "v2", "v3", "v4",

  "v5", "v6", "sl", "fp",

  "ip", "sp", "lr", "pc",

#if HAVE_FLOAT_REGS

  "f0", "f1", "f2", "f3",

  "f4", "f5", "f6", "f7",

  "fps",

#endif

  "ps"

};

static char *standard_names[] =

{

  "r0",  "r1",  "r2",  "r3",

  "r4",  "r5",  "r6",  "r7",

  "r8",  "r9",  "r10", "r11",

  "r12", "r13", "r14", "pc",

#if HAVE_FLOAT_REGS

  "f0",  "f1",  "f2",  "f3",

  "f4",  "f5",  "f6",  "f7",

  "fps",

#endif

  "ps",

};

void arm_othernames (void);

struct regstruct regtab[] =

{

  { 0, REG_R0,   REGTYPE_INT   },

  { 0, REG_R1,   REGTYPE_INT   },

  { 0, REG_R2,   REGTYPE_INT   },

  { 0, REG_R3,   REGTYPE_INT   },

  { 0, REG_R4,   REGTYPE_INT   },

  { 0, REG_R5,   REGTYPE_INT   },

  { 0, REG_R6,   REGTYPE_INT   },

  { 0, REG_R7,   REGTYPE_INT   },

  { 0, REG_R8,   REGTYPE_INT   },

  { 0, REG_R9,   REGTYPE_INT   },

  { 0, REG_R10,  REGTYPE_INT   },

  { 0, REG_R11,  REGTYPE_INT   },

  { 0, REG_R12,  REGTYPE_INT   },

  { 0, REG_SP,   REGTYPE_INT   },

  { 0, REG_LR,   REGTYPE_INT   },

  { 0, REG_PC,   REGTYPE_INT   },

#if HAVE_FLOAT_REGS

  { 0, REG_F0,   REGTYPE_FLOAT },

  { 0, REG_F1,   REGTYPE_FLOAT },

  { 0, REG_F2,   REGTYPE_FLOAT },

  { 0, REG_F3,   REGTYPE_FLOAT },

  { 0, REG_F4,   REGTYPE_FLOAT },

  { 0, REG_F5,   REGTYPE_FLOAT },

  { 0, REG_F6,   REGTYPE_FLOAT },

  { 0, REG_F6,   REGTYPE_FLOAT },

  { 0, REG_FPS,  REGTYPE_FLOAT },

#endif

  { 0, REG_CPSR, REGTYPE_INT   },

  { 0, 0,        0             } /* Terminating element must be last */

} ;

void

initialize_mon(void)

{

  /* FIXME: Convert ALL variable initializations to assignments

     in order to support ROMABLE CODE.

     This includes the register table

     */

  /*

   * Call arm_othernames to sync up Cygmon and the disassembler

   * and ensure they are using the same set of registernames

   */

  arm_othernames();

  /*

   * Call arm_othernames again to revert to the assembler

   * default names

   */

  arm_othernames();

} /* initialize_mon */

/*

  read_memory

  write_memory

       Defaults to generic_mem.c

       */

/* SET_BREAKPOINT -

   CLEAR_BREAKPOINT

   Defaults to generic_bp32.c

   */

#ifndef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS

/* Return the currently-saved value corresponding to register "regnum". */

target_regval_t

get_register (int regnum)

{

    struct regstruct *p;

    target_regval_t reg;

    int   offset, len;

    char  *dest = (char*)0;

    for (p = regtab; p->registername && p->registernumber != regnum; ++p)

        ;

    if (p->registername) {

        len = bsp_regsize(p->registernumber);

        offset = bsp_regbyte(p->registernumber);

        switch (p->registertype) {

          case REGTYPE_INT:

            dest = (char*)&(reg.i);

            break;

#if HAVE_FLOAT_REGS

        case REGTYPE_FLOAT:

            dest = (char*)&(reg.f);

            break;

#endif

#if HAVE_DOUBLE_REGS

        case REGTYPE_DOUBLE:

            dest = (char*)&(reg.d);

            break;

#endif

        }

        if (dest)

            memcpy(dest, (char *)mon_saved_regs + offset, len);

    } else

        reg.i = 0;

    return reg;

}

/* Store VALUE in the register corresponding to REGNUM. */

void

put_register (int regnum, target_regval_t value)

{

    int   offset, len;

    len = bsp_regsize(regnum);

    offset = bsp_regbyte(regnum);

    memcpy((char *)mon_saved_regs + offset, &value, len);

}

#endif // !CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS

/* Change to the alternate register set names */

void

arm_othernames (void)

{

    static int regset = 1;

    char **name;

    int  i;

#ifdef DISASSEMBLER

    /* Change the disassembler */

    regset = arm_toggle_regnames();

#else

    regset = (regset == 0) ? 1 : 0;

#endif

    /* Change cygmon */

    if (regset == 1)

        /* Disassembler is using apcs names. */

        name = apcs_names;

    else

        /* Disassembler is using standard names. */

        name = standard_names;

    for (i = 0; i < (sizeof(apcs_names)/sizeof(apcs_names[0])); i++)

        regtab[i].registername = name[i];

}

#ifdef __ECOS__

#include <pkgconf/hal.h>

#include <cyg/hal/hal_arch.h>

#include "bsp/common/bsp_if.h"

int

machine_syscall(HAL_SavedRegisters *regs)

{

    int res, err;

    err = _bsp_do_syscall(regs->d[0], // Function

                          regs->d[1], regs->d[2], regs->d[3], 0, // arguments,

                          &res);

    regs->d[0] = res;

    regs->pc += 4;  // Advance PC

    return err;

}

#endif