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/*  armrdi.c -- ARMulator RDI 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. */

#include <string.h>

#include <ctype.h>

#include "armdefs.h"

#include "armemu.h"

#include "armos.h"

#include "dbg_cp.h"

#include "dbg_conf.h"

#include "dbg_rdi.h"

#include "dbg_hif.h"

#include "communicate.h"

/***************************************************************************\

*                               Declarations                                *

\***************************************************************************/

#define Watch_AnyRead (RDIWatch_ByteRead+RDIWatch_HalfRead+RDIWatch_WordRead)

#define Watch_AnyWrite (RDIWatch_ByteWrite+RDIWatch_HalfWrite+RDIWatch_WordWrite)

static unsigned FPRegsAddr;     /* last known address of FPE regs */

#define FPESTART 0x2000L

#define FPEEND   0x8000L

#define IGNORE(d) (d = d)

#ifdef RDI_VERBOSE

#define TracePrint(s) \

 if (rdi_log & 1) ARMul_DebugPrint s

#else

#define TracePrint(s)

#endif

static ARMul_State *state = NULL;

static unsigned BreaksSet;      /* The number of breakpoints set */

static int rdi_log = 0;          /* debugging  ? */

#define LOWEST_RDI_LEVEL 0

#define HIGHEST_RDI_LEVEL 1

static int MYrdi_level = LOWEST_RDI_LEVEL;

typedef struct BreakNode BreakNode;

typedef struct WatchNode WatchNode;

struct BreakNode

{                               /* A breakpoint list node */

  BreakNode *next;

  ARMword address;              /* The address of this breakpoint */

  unsigned type;                /* The type of comparison */

  ARMword bound;                /* The other address for a range */

  ARMword inst;

};

struct WatchNode

{                               /* A watchpoint list node */

  WatchNode *next;

  ARMword address;              /* The address of this watchpoint */

  unsigned type;                /* The type of comparison */

  unsigned datatype;            /* The type of access to watch for */

  ARMword bound;                /* The other address for a range */

};

BreakNode *BreakList = NULL;

WatchNode *WatchList = NULL;

void

ARMul_DebugPrint_i (const Dbg_HostosInterface * hostif, const char *format,

                    ...)

{

  va_list ap;

  va_start (ap, format);

  hostif->dbgprint (hostif->dbgarg, format, ap);

  va_end (ap);

}

void

ARMul_DebugPrint (ARMul_State * state, const char *format, ...)

{

  va_list ap;

  va_start (ap, format);

  if (!(rdi_log & 8))

    state->hostif->dbgprint (state->hostif->dbgarg, format, ap);

  va_end (ap);

}

#define CONSOLE_PRINT_MAX_LEN 128

void

ARMul_ConsolePrint (ARMul_State * state, const char *format, ...)

{

  va_list ap;

  int ch;

  char *str, buf[CONSOLE_PRINT_MAX_LEN];

  int i, j;

  ARMword junk;

  va_start (ap, format);

  vsprintf (buf, format, ap);

  for (i = 0; buf[i]; i++);      /* The string is i chars long */

  str = buf;

  while (i >= 32)

    {

      MYwrite_char (kidmum[1], RDP_OSOp);

      MYwrite_word (kidmum[1], SWI_Write0);

      MYwrite_char (kidmum[1], OS_SendString);

      MYwrite_char (kidmum[1], 32);     /* Send string 32bytes at a time */

      for (j = 0; j < 32; j++, str++)

        MYwrite_char (kidmum[1], *str);

      wait_for_osreply (&junk);

      i -= 32;

    }

  if (i > 0)

    {

      MYwrite_char (kidmum[1], RDP_OSOp);

      MYwrite_word (kidmum[1], SWI_Write0);

      MYwrite_char (kidmum[1], OS_SendString);

      MYwrite_char (kidmum[1], (unsigned char) i);      /* Send remainder of string  */

      for (j = 0; j < i; j++, str++)

        MYwrite_char (kidmum[1], *str);

      wait_for_osreply (&junk);

    }

  va_end (ap);

  return;

/*   str = buf; */

/*   while ((ch=*str++) != 0) */

/*     state->hostif->writec(state->hostif->hostosarg, ch); */

}

void

ARMul_DebugPause (ARMul_State * state)

{

  if (!(rdi_log & 8))

    state->hostif->dbgpause (state->hostif->dbgarg);

}

/***************************************************************************\

*                                 RDI_open                                  *

\***************************************************************************/

static void

InitFail (int exitcode, char const *which)

{

  ARMul_ConsolePrint (state, "%s interface failed to initialise. Exiting\n",

                      which);

  exit (exitcode);

}

static void

RDIInit (unsigned type)

{

  if (type == 0)

    {                           /* cold start */

      state->CallDebug = state->MemReadDebug = state->MemWriteDebug = 0;

      BreaksSet = 0;

    }

}

#define UNKNOWNPROC 0

typedef struct

{

  char name[16];

  unsigned properties;

}

Processor;

Processor const p_arm2 =    { "ARM2",   ARM_Fix26_Prop };

Processor const p_arm2as =  { "ARM2AS", ARM_Fix26_Prop };

Processor const p_arm61 =   { "ARM61",  ARM_Fix26_Prop };

Processor const p_arm3 =    { "ARM3",   ARM_Fix26_Prop };

Processor const p_arm6 =    { "ARM6",   ARM_Lock_Prop };

Processor const p_arm60 =   {  "ARM60", ARM_Lock_Prop };

Processor const p_arm600 =  { "ARM600", ARM_Lock_Prop };

Processor const p_arm610 =  { "ARM610", ARM_Lock_Prop };

Processor const p_arm620 =  { "ARM620", ARM_Lock_Prop };

Processor const p_unknown = { "",       0 };

Processor const *const processors[] =

{

  &p_arm6,                      /* default: must come first */

  &p_arm2,

  &p_arm2as,

  &p_arm61,

  &p_arm3,

  &p_arm60,

  &p_arm600,

  &p_arm610,

  &p_arm620,

  &p_unknown

};

typedef struct ProcessorConfig ProcessorConfig;

struct ProcessorConfig

{

  long id[2];

  ProcessorConfig const *self;

  long count;

  Processor const *const *processors;

};

ProcessorConfig const processorconfig = {

  {((((((long) 'x' << 8) | ' ') << 8) | 'c') << 8) | 'p',

   ((((((long) 'u' << 8) | 's') << 8) | ' ') << 8) | 'x'},

  &processorconfig,

  16,

  processors

};

static int

RDI_open (unsigned type, const Dbg_ConfigBlock * config,

          const Dbg_HostosInterface * hostif, struct Dbg_MCState *dbg_state)

/* Initialise everything */

{

  int virgin = (state == NULL);

  IGNORE (dbg_state);

#ifdef RDI_VERBOSE

  if (rdi_log & 1)

    {

      if (virgin)

        ARMul_DebugPrint_i (hostif, "RDI_open: type = %d\n", type);

      else

        ARMul_DebugPrint (state, "RDI_open: type = %d\n", type);

    }

#endif

  if (type & 1)

    {                           /* Warm start */

      ARMul_Reset (state);

      RDIInit (1);

    }

  else

    {

      if (virgin)

        {

          ARMul_EmulateInit ();

          state = ARMul_NewState ();

          state->hostif = hostif;

          {

            int req = config->processor;

            unsigned processor = processors[req]->val;

            ARMul_SelectProcessor (state, processor);

            ARMul_Reset (state);

            ARMul_ConsolePrint (state, "ARMulator V1.50, %s",

                                processors[req]->name);

          }

          if (ARMul_MemoryInit (state, config->memorysize) == FALSE)

            InitFail (1, "Memory");

          if (config->bytesex != RDISex_DontCare)

            state->bigendSig = config->bytesex;

          if (ARMul_CoProInit (state) == FALSE)

            InitFail (2, "Co-Processor");

          if (ARMul_OSInit (state) == FALSE)

            InitFail (3, "Operating System");

        }

      ARMul_Reset (state);

      RDIInit (0);

    }

  if (type & 2)

    {                           /* Reset the comms link */

      /* what comms link ? */

    }

  if (virgin && (type & 1) == 0) /* Cold start */

    ARMul_ConsolePrint (state, ", %s endian.\n",

                        state->bigendSig ? "Big" : "Little");

  if (config->bytesex == RDISex_DontCare)

    return (state->bigendSig ? RDIError_BigEndian : RDIError_LittleEndian);

  else

    return (RDIError_NoError);

}

/***************************************************************************\

*                                RDI_close                                  *

\***************************************************************************/

static int

RDI_close (void)

{

  TracePrint ((state, "RDI_close\n"));

  ARMul_OSExit (state);

  ARMul_CoProExit (state);

  ARMul_MemoryExit (state);

  return (RDIError_NoError);

}

/***************************************************************************\

*                                 RDI_read                                  *

\***************************************************************************/

static int

RDI_read (ARMword source, void *dest, unsigned *nbytes)

{

  unsigned i;

  char *memptr = (char *) dest;

  TracePrint ((state, "RDI_read: source=%.8lx dest=%p nbytes=%.8x\n",

               source, dest, *nbytes));

  for (i = 0; i < *nbytes; i++)

    *memptr++ = (char) ARMul_ReadByte (state, source++);

  if (state->abortSig)

    {

      state->abortSig = LOW;

      return (RDIError_DataAbort);

    }

  return (RDIError_NoError);

}

/***************************************************************************\

*                                  RDI_write                                *

\***************************************************************************/

static int

RDI_write (const void *source, ARMword dest, unsigned *nbytes)

{

  unsigned i;

  char *memptr = (char *) source;

  TracePrint ((state, "RDI_write: source=%p dest=%.8lx nbytes=%.8x\n",

               source, dest, *nbytes));

  for (i = 0; i < *nbytes; i++)

    ARMul_WriteByte (state, (ARMword) dest++, (ARMword) * memptr++);

  if (state->abortSig)

    {

      state->abortSig = LOW;

      return (RDIError_DataAbort);

    }

  return (RDIError_NoError);

}

/***************************************************************************\

*                                RDI_CPUread                                *

\***************************************************************************/

static int

RDI_CPUread (unsigned mode, unsigned long mask, ARMword buffer[])

{

  unsigned i, upto;

  if (mode == RDIMode_Curr)

    mode = (unsigned) (ARMul_GetCPSR (state) & MODEBITS);

  for (upto = 0, i = 0; i < 15; i++)

    if (mask & (1L << i))

      {

        buffer[upto++] = ARMul_GetReg (state, mode, i);

      }

  if (mask & RDIReg_R15)

    {

      buffer[upto++] = ARMul_GetR15 (state);

    }

  if (mask & RDIReg_PC)

    {

      buffer[upto++] = ARMul_GetPC (state);

    }

  if (mask & RDIReg_CPSR)

    buffer[upto++] = ARMul_GetCPSR (state);

  if (mask & RDIReg_SPSR)

    buffer[upto++] = ARMul_GetSPSR (state, mode);

  TracePrint ((state, "RDI_CPUread: mode=%.8x mask=%.8lx", mode, mask));

#ifdef RDI_VERBOSE

  if (rdi_log & 1)

    {

      for (upto = 0, i = 0; i <= 20; i++)

        if (mask & (1L << i))

          {

            ARMul_DebugPrint (state, "%c%.8lx", upto % 4 == 0 ? '\n' : ' ',

                              buffer[upto]);

            upto++;

          }

      ARMul_DebugPrint (state, "\n");

    }

#endif

  return (RDIError_NoError);

}

/***************************************************************************\

*                               RDI_CPUwrite                                *

\***************************************************************************/

static int

RDI_CPUwrite (unsigned mode, unsigned long mask, ARMword const buffer[])

{

  int i, upto;

  TracePrint ((state, "RDI_CPUwrite: mode=%.8x mask=%.8lx", mode, mask));

#ifdef RDI_VERBOSE

  if (rdi_log & 1)

    {

      for (upto = 0, i = 0; i <= 20; i++)

        if (mask & (1L << i))

          {

            ARMul_DebugPrint (state, "%c%.8lx", upto % 4 == 0 ? '\n' : ' ',

                              buffer[upto]);

            upto++;

          }

      ARMul_DebugPrint (state, "\n");

    }

#endif

  if (mode == RDIMode_Curr)

    mode = (unsigned) (ARMul_GetCPSR (state) & MODEBITS);

  for (upto = 0, i = 0; i < 15; i++)

    if (mask & (1L << i))

      ARMul_SetReg (state, mode, i, buffer[upto++]);

  if (mask & RDIReg_R15)

    ARMul_SetR15 (state, buffer[upto++]);

  if (mask & RDIReg_PC)

    {

      ARMul_SetPC (state, buffer[upto++]);

    }

  if (mask & RDIReg_CPSR)

    ARMul_SetCPSR (state, buffer[upto++]);

  if (mask & RDIReg_SPSR)

    ARMul_SetSPSR (state, mode, buffer[upto++]);

  return (RDIError_NoError);

}

/***************************************************************************\

*                                RDI_CPread                                 *

\***************************************************************************/

static int

RDI_CPread (unsigned CPnum, unsigned long mask, ARMword buffer[])

{

  ARMword fpregsaddr, word[4];

  unsigned r, w;

  unsigned upto;

  if (CPnum != 1 && CPnum != 2)

    {

      unsigned char const *rmap = state->CPRegWords[CPnum];

      if (rmap == NULL)

        return (RDIError_UnknownCoPro);

      for (upto = 0, r = 0; r < rmap[-1]; r++)

        if (mask & (1L << r))

          {

            (void) state->CPRead[CPnum] (state, r, &buffer[upto]);

            upto += rmap[r];

          }

      TracePrint ((state, "RDI_CPread: CPnum=%d mask=%.8lx", CPnum, mask));

#ifdef RDI_VERBOSE

      if (rdi_log & 1)

        {

          w = 0;

          for (upto = 0, r = 0; r < rmap[-1]; r++)

            if (mask & (1L << r))

              {

                int words = rmap[r];

                ARMul_DebugPrint (state, "%c%2d",

                                  (w >= 4 ? (w = 0, '\n') : ' '), r);

                while (--words >= 0)

                  {

                    ARMul_DebugPrint (state, " %.8lx", buffer[upto++]);

                    w++;

                  }

              }

          ARMul_DebugPrint (state, "\n");

        }

#endif

      return RDIError_NoError;

    }

#ifdef NOFPE

  return RDIError_UnknownCoPro;

#else

  if (FPRegsAddr == 0)

    {

      fpregsaddr = ARMul_ReadWord (state, 4L);

      if ((fpregsaddr & 0xff800000) != 0xea000000)      /* Must be a forward branch */

        return RDIError_UnknownCoPro;

      fpregsaddr = ((fpregsaddr & 0xffffff) << 2) + 8;  /* address in __fp_decode - 4 */

      if ((fpregsaddr < FPESTART) || (fpregsaddr >= FPEEND))

        return RDIError_UnknownCoPro;

      fpregsaddr = ARMul_ReadWord (state, fpregsaddr);  /* pointer to fp registers */

      FPRegsAddr = fpregsaddr;

    }

  else

    fpregsaddr = FPRegsAddr;

  if (fpregsaddr == 0)

    return RDIError_UnknownCoPro;

  for (upto = 0, r = 0; r < 8; r++)

    if (mask & (1L << r))

      {

        for (w = 0; w < 4; w++)

          word[w] =

            ARMul_ReadWord (state,

                            fpregsaddr + (ARMword) r * 16 + (ARMword) w * 4);

        switch ((int) (word[3] >> 29))

          {

          case 0:

          case 2:

          case 4:

          case 6:               /* its unpacked, convert to extended */

            buffer[upto++] = 2; /* mark as extended */

            buffer[upto++] = (word[3] & 0x7fff) | (word[0] & 0x80000000);        /* exp and sign */

            buffer[upto++] = word[1];   /* mantissa 1 */

            buffer[upto++] = word[2];   /* mantissa 2 */

            break;

          case 1:               /* packed single */

            buffer[upto++] = 0;  /* mark as single */

            buffer[upto++] = word[0];    /* sign, exp and mantissa */

            buffer[upto++] = word[1];   /* padding */

            buffer[upto++] = word[2];   /* padding */

            break;

          case 3:               /* packed double */

            buffer[upto++] = 1; /* mark as double */

            buffer[upto++] = word[0];    /* sign, exp and mantissa1 */

            buffer[upto++] = word[1];   /* mantissa 2 */

            buffer[upto++] = word[2];   /* padding */

            break;

          case 5:               /* packed extended */

            buffer[upto++] = 2; /* mark as extended */

            buffer[upto++] = word[0];    /* sign and exp */

            buffer[upto++] = word[1];   /* mantissa 1 */

            buffer[upto++] = word[2];   /* mantissa 2 */

            break;

          case 7:               /* packed decimal */

            buffer[upto++] = 3; /* mark as packed decimal */

            buffer[upto++] = word[0];    /* sign, exp and mantissa1 */

            buffer[upto++] = word[1];   /* mantissa 2 */

            buffer[upto++] = word[2];   /* mantissa 3 */

            break;

          }

      }

  if (mask & (1L << r))

    buffer[upto++] = ARMul_ReadWord (state, fpregsaddr + 128);  /* fpsr */

  if (mask & (1L << (r + 1)))

    buffer[upto++] = 0;          /* fpcr */

  TracePrint ((state, "RDI_CPread: CPnum=%d mask=%.8lx\n", CPnum, mask));

#ifdef RDI_VERBOSE

  if (rdi_log & 1)

    {

      for (upto = 0, r = 0; r < 9; r++)

        if (mask & (1L << r))

          {

            if (r != 8)

              {

                ARMul_DebugPrint (state, "%08lx ", buffer[upto++]);

                ARMul_DebugPrint (state, "%08lx ", buffer[upto++]);

                ARMul_DebugPrint (state, "%08lx ", buffer[upto++]);

              }

            ARMul_DebugPrint (state, "%08lx\n", buffer[upto++]);

          }

      ARMul_DebugPrint (state, "\n");

    }

#endif

  return (RDIError_NoError);

#endif /* NOFPE */

}

/***************************************************************************\

*                               RDI_CPwrite                                 *

\***************************************************************************/

static int

RDI_CPwrite (unsigned CPnum, unsigned long mask, ARMword const buffer[])

{

  unsigned r;

  unsigned upto;

  ARMword fpregsaddr;

  if (CPnum != 1 && CPnum != 2)

    {

      unsigned char const *rmap = state->CPRegWords[CPnum];

      if (rmap == NULL)

        return (RDIError_UnknownCoPro);

      TracePrint ((state, "RDI_CPwrite: CPnum=%d mask=%.8lx", CPnum, mask));

#ifdef RDI_VERBOSE

      if (rdi_log & 1)

        {

          int w = 0;

          for (upto = 0, r = 0; r < rmap[-1]; r++)

            if (mask & (1L << r))

              {

                int words = rmap[r];

                ARMul_DebugPrint (state, "%c%2d",

                                  (w >= 4 ? (w = 0, '\n') : ' '), r);

                while (--words >= 0)

                  {

                    ARMul_DebugPrint (state, " %.8lx", buffer[upto++]);

                    w++;

                  }

              }

          ARMul_DebugPrint (state, "\n");