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/* mprofiler.c -- memory profiling utility

   Copyright (C) 2002 Marko Mlinar, markom@opencores.org

   Copyright (C) 1999 Damjan Lampret, lampret@opencores.org

   Copyright (C) 2008 Embecosm Limited

   Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>

   This file is part of Or1ksim, the OpenRISC 1000 Architectural Simulator.

   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 3 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, see <http://www.gnu.org/licenses/>.  */

/* This program is commented throughout in a fashion suitable for processing

   with Doxygen. */

/* Autoconf and/or portability configuration */

#include "config.h"

#include "port.h"

/* System includes */

#include <stdlib.h>

#include <regex.h>

/* Package includes */

#include "mprofiler.h"

#include "sim-config.h"

#include "argtable2.h"

#include "support/profile.h"

/* output modes */

#define MODE_DETAIL     0

#define MODE_PRETTY     1

#define MODE_ACCESS     2

#define MODE_WIDTH      3

/* Input buffer size */

#define BUF_SIZE        256

/* HASH */

#define HASH_SIZE       0x10000

#define HASH_FUNC(x)    ((x) & 0xffff)

/*! Hash table data structure */

static struct memory_hash

{

  struct memory_hash *next;

  oraddr_t            addr;

  unsigned long       cnt[3];           /* Various counters */

} *hash[HASH_SIZE];

/*! Groups size -- how much addresses should be joined together */

static int  group_bits = 2;

/*! Start address */

static oraddr_t  start_addr = 0;

/*! End address */

static oraddr_t  end_addr = 0xffffffff;

/* File to read from */

static FILE *fprof = 0;

static void

hash_add (oraddr_t addr, int index)

{

  struct memory_hash *h = hash[HASH_FUNC (addr)];

  while (h && h->addr != addr)

    h = h->next;

  if (!h)

    {

      h = (struct memory_hash *) malloc (sizeof (struct memory_hash));

      h->next = hash[HASH_FUNC (addr)];

      hash[HASH_FUNC (addr)] = h;

      h->addr = addr;

      h->cnt[0] = h->cnt[1] = h->cnt[2] = 0;

    }

  h->cnt[index]++;

}

static unsigned long

hash_get (oraddr_t addr, int index)

{

  struct memory_hash *h = hash[HASH_FUNC (addr)];

  while (h && h->addr != addr)

    h = h->next;

  if (!h)

    return 0;

  return h->cnt[index];

}

static void

init ()

{

  int i;

  for (i = 0; i < HASH_SIZE; i++)

    hash[i] = NULL;

}

static void

read_file (FILE * f, int mode)

{

  struct mprofentry_struct buf[BUF_SIZE];

  int num_read;

  do

    {

      int i;

      num_read = fread (buf, sizeof (struct mprofentry_struct), BUF_SIZE, f);

      for (i = 0; i < num_read; i++)

        if (buf[i].addr >= start_addr && buf[i].addr <= end_addr)

          {

            int index;

            unsigned t = buf[i].type;

            if (t > 64)

              {

                PRINTF ("!");

                t = 0;

              }

            if (mode == MODE_WIDTH)

              t >>= 3;

            else

              t &= 0x7;

            switch (t)

              {

              case 1:

                index = 0;

                break;

              case 2:

                index = 1;

                break;

              case 4:

                index = 2;

                break;

              default:

                index = 0;

                PRINTF ("!!!!");

                break;

              }

            hash_add (buf[i].addr >> group_bits, index);

          }

    }

  while (num_read > 0);

}

static int

nbits (unsigned long a)

{

  int cnt = 0;

  int b = a;

  if (!a)

    return 0;

  while (a)

    a >>= 1, cnt++;

  if (cnt > 1 && ((b >> (cnt - 2)) & 1))

    cnt = cnt * 2 + 1;

  else

    cnt *= 2;

  return cnt - 1;

}

static void

printout (int mode)

{

  oraddr_t addr = start_addr & ~((1 << group_bits) - 1);

  PRINTF ("start = %" PRIxADDR " (%" PRIxADDR "); end = %" PRIxADDR

          "; group_bits = %08x\n", start_addr, addr, end_addr,

          (1 << group_bits) - 1);

  for (; addr <= end_addr; addr += (1 << group_bits))

    {

      int i;

      unsigned long a = hash_get (addr >> group_bits, 0);

      unsigned long b = hash_get (addr >> group_bits, 1);

      unsigned long c = hash_get (addr >> group_bits, 2);

      PRINTF ("%" PRIxADDR ":", addr);

      switch (mode)

        {

        case MODE_DETAIL:

          if (a)

            PRINTF (" %10li R", a);

          else

            PRINTF ("            R");

          if (b)

            PRINTF (" %10li W", b);

          else

            PRINTF ("            W");

          if (c)

            PRINTF (" %10li F", c);

          else

            PRINTF ("            F");

          break;

        case MODE_ACCESS:

          PRINTF (" %10li", a + b + c);

          break;

        case MODE_PRETTY:

          PRINTF (" %10li ", a + b + c);

          for (i = 0; i < nbits (a + b + c); i++)

            PRINTF ("#");

          break;

        case MODE_WIDTH:

          if (a)

            PRINTF (" %10li B", a);

          else

            PRINTF ("            B");

          if (b)

            PRINTF (" %10li H", b);

          else

            PRINTF ("            H");

          if (c)

            PRINTF (" %10li W", c);

          else

            PRINTF ("            W");

          break;

        }

      PRINTF ("\n");

      if (addr >= addr + (1 << group_bits))

        break;                  /* Overflow? */

    }

}

/*---------------------------------------------------------------------------*/

/*! Parse the arguments for the profiling utility

    Updated by Jeremy Bennett to use argtable2. Also has an option just to

    print help, for use with the CLI.

    @param[in] argc       Number of command args

    @param[in] argv       Vector of the command args

    @param[in] just_help  If 1 (true), ignore argc & argv and just print out

                          the help message without parsing args

    @return  0 on success, 1 on failure                                      */

/*---------------------------------------------------------------------------*/

int

main_mprofiler (int argc, char *argv[], int just_help)

{

  struct arg_lit *vercop;

  struct arg_lit *help;

  struct arg_rex *mode_arg;

  struct arg_int *group;

  struct arg_file *prof_file;

  struct arg_int *from;

  struct arg_int *to;

  struct arg_end *end;

  void *argtab[8];

  int nerrors;

  int mode = MODE_DETAIL;

  /* Specify each argument, with fallback values */

  vercop = arg_lit0 ("v", "version", "version and copyright notice");

  help = arg_lit0 ("h", "help", "print this help message");

  mode_arg = arg_rex0 ("m", "mode",

                       "(detailed|d)|(pretty|p)|(access|a)|"

                       "(width|w)", "<m>", REG_ICASE,

                       "Output mode (detailed, pretty, access " "or width)");

  mode_arg->sval[0] = "detailed";

  group = arg_int0 ("g", "group", "<n>",

                    "group 2^n bits successive addresses " "together");

  group->ival[0] = 0;

  prof_file = arg_file0 ("f", "filename", "<file>",

                         "data file to analyse (default " "sim.mprofile)");

  prof_file->filename[0] = "sim.mprofile";

  from = arg_int1 (NULL, NULL, "<from>", "start address");

  to = arg_int1 (NULL, NULL, "<to>", "end address");

  end = arg_end (20);

  /* Set up the argument table */

  argtab[0] = vercop;

  argtab[1] = help;

  argtab[2] = mode_arg;

  argtab[3] = group;

  argtab[4] = prof_file;

  argtab[5] = from;

  argtab[6] = to;

  argtab[7] = end;

  /* If we are just asked for a help message, then we don't parse the

     args. This is used to implement the help function from the CLI. */

  if (just_help)

    {

      printf ("mprofile");

      arg_print_syntax (stdout, argtab, "\n");

      arg_print_glossary (stdout, argtab, "  %-25s %s\n");

      arg_freetable (argtab, sizeof (argtab) / sizeof (argtab[0]));

      return 0;

    }

  /* Parse */

  nerrors = arg_parse (argc, argv, argtab);

  /* Special case here is if help or version is specified, we ignore any other

     errors and just print the help or version information and then give up. */

  if (vercop->count > 0)

    {

      PRINTF ("OpenRISC 1000 Memory Profiling Utility, version %s\n",

              PACKAGE_VERSION);

      arg_freetable (argtab, sizeof (argtab) / sizeof (argtab[0]));

      return 0;

    }

  if (help->count > 0)

    {

      printf ("Usage: %s ", argv[0]);

      arg_print_syntax (stdout, argtab, "\n");

      arg_print_glossary (stdout, argtab, "  %-25s %s\n");

      arg_freetable (argtab, sizeof (argtab) / sizeof (argtab[0]));

      return 0;

    }

  /* Deal with any errors */

  if (0 != nerrors)

    {

      arg_print_errors (stderr, end, "mprofile");

      fprintf (stderr, "Usage: %s ", argv[0]);

      arg_print_syntaxv (stderr, argtab, "\n");

      arg_freetable (argtab, sizeof (argtab) / sizeof (argtab[0]));

      return 1;

    }

  /* If version or help is requested, that is all that is printed out */

  /* Sort out the mode */

  if ((0 == strcmp (mode_arg->sval[0], "detail")) ||

      (0 == strcmp (mode_arg->sval[0], "d")))

    {

      mode = MODE_DETAIL;

    }

  else if ((0 == strcmp (mode_arg->sval[0], "pretty")) ||

           (0 == strcmp (mode_arg->sval[0], "p")))

    {

      mode = MODE_DETAIL;

    }

  else if ((0 == strcmp (mode_arg->sval[0], "access")) ||

           (0 == strcmp (mode_arg->sval[0], "a")))

    {

      mode = MODE_DETAIL;

    }

  else if ((0 == strcmp (mode_arg->sval[0], "width")) ||

           (0 == strcmp (mode_arg->sval[0], "w")))

    {

      mode = MODE_DETAIL;

    }

  else

    {

      fprintf (stderr, "Impossible mode: %s\n", mode_arg->sval[0]);

    }

  /* Group bits */

  group_bits = group->ival[0];

  /* Start and end addresses */

  start_addr = from->ival[0];

  end_addr = to->ival[0];

  /* Get the profile */

  fprof = fopen (prof_file->filename[0], "rm");

  if (!fprof)

    {

      fprintf (stderr, "Cannot open profile file: %s\n",

               prof_file->filename[0]);

      arg_freetable (argtab, sizeof (argtab) / sizeof (argtab[0]));

      return 1;

    }

  /* Finished with the args */

  arg_freetable (argtab, sizeof (argtab) / sizeof (argtab[0]));

  init ();

  read_file (fprof, mode);

  fclose (fprof);

  printout (mode);

  return 0;

}       /* main_mprofiler () */