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#include "common.h"

#include "support.h"

#include "spr_defs.h"

void show_mem (int start, int stop)

{

  unsigned long i = start;

  if ((i & 0xf) != 0x0) printf ("\n%08lx: ", i);

  for(; i <= stop; i += 4) {

    if ((i & 0xf) == 0x0) printf ("\n%08lx: ", i);

    /* Read one word */

    printf ("%08lx ", REG32(i));

  }

  printf ("\n");

}

void testram (unsigned long start_addr, unsigned long stop_addr, unsigned long testno)

{

  unsigned long addr;

  unsigned long err_addr = 0;

  unsigned long err_no = 0;

  /* Test 1: Write locations with their addresses */

  if ((testno == 1) || (testno == 0)) {

    printf ("\n1. Writing locations with their addresses: ");

    for (addr = start_addr; addr <= stop_addr; addr += 4)

      REG32(addr) = addr;

    /* Verify */

    for (addr = start_addr; addr <= stop_addr; addr += 4)

      if (REG32(addr) != addr) {

        err_no++;

        err_addr = addr;

      }

    if (err_no) printf ("%04lx times failed. Last at location %08lx", err_no, err_addr);

    else printf ("Passed");

    err_no = 0;

  }

  /* Test 2: Write locations with their inverse address */

  if ((testno == 2) || (testno == 0)) {

    printf ("\n2. Writing locations with their inverse addresses: ");

    for (addr = start_addr; addr <= stop_addr; addr += 4)

      REG32(addr) = ~addr;

    /* Verify */

    for (addr = start_addr; addr <= stop_addr; addr += 4)

      if (REG32(addr) != ~addr) {

        err_no++;

        err_addr = addr;

      }

    if (err_no) printf ("%04lx times failed. Last at location %08lx", err_no, err_addr);

    else printf ("Passed");

    err_no = 0;

  }

  /* Test 3: Write locations with walking ones */

  if ((testno == 3) || (testno == 0)) {

    printf ("\n3. Writing locations with walking ones: ");

    for (addr = start_addr; addr <= stop_addr; addr += 4)

      REG32(addr) = 1 << (addr >> 2);

    /* Verify */

    for (addr = start_addr; addr <= stop_addr; addr += 4)

      if (REG32(addr) != (1 << (addr >> 2))) {

        err_no++;

        err_addr = addr;

      }

    if (err_no) printf ("%04lx times failed. Last at location %08lx", err_no, err_addr);

    else printf ("Passed");

    err_no = 0;

  }

  /* Test 4: Write locations with walking zeros */

  if ((testno == 4) || (testno == 0)) {

    printf ("\n4. Writing locations with walking zeros: ");

    for (addr = start_addr; addr <= stop_addr; addr += 4)

      REG32(addr) = ~(1 << (addr >> 2));

    /* Verify */

    for (addr = start_addr; addr <= stop_addr; addr += 4)

      if (REG32(addr) != ~(1 << (addr >> 2))) {

        err_no++;

        err_addr = addr;

      }

    if (err_no) printf ("%04lx times failed. Last at location %08lx", err_no, err_addr);

    else printf ("Passed");

    err_no = 0;

  }

}

int dm_cmd (int argc, char *argv[])

{

  switch (argc) {

    case 1: show_mem (strtoul (argv[0], 0, 0), strtoul (argv[0], 0, 0)); return 0;

    case 2: show_mem (strtoul (argv[0], 0, 0), strtoul (argv[1], 0, 0)); return 0;

    default: return -1;

  }

}

int pm_cmd (int argc, char *argv[])

{

  unsigned long addr, stop_addr, value;

  if ((argc == 3) || (argc == 2)) {

    addr = strtoul (argv[0], 0, 0);

    if (argc == 2) {

      stop_addr = strtoul (argv[0], 0, 0);

      value = strtoul (argv[1], 0, 0);

    } else {

      stop_addr = strtoul (argv[1], 0, 0);

      value = strtoul (argv[2], 0, 0);

    }

    for (; addr <= stop_addr; addr += 4) REG32(addr) = value;

    /*show_mem(strtoul (argv[0], 0, 0), stop_addr);*/

  } else return -1;

  return 0;

}

int ram_test_cmd (int argc, char *argv[])

{

  switch (argc) {

    case 2: testram(strtoul (argv[0], 0, 0), strtoul (argv[1], 0, 0), 0); return 0;

    case 3: testram(strtoul (argv[0], 0, 0), strtoul (argv[1], 0, 0), strtoul (argv[2], 0, 0)); return 0;

    default: return -1;

  }

}

unsigned long crc32 (unsigned long crc, const unsigned char *buf, unsigned long len)

{

  /* Create bitwise CRC table first */

  unsigned long crc_table[256];

  int i, k;

  for (i = 0; i < 256; i++) {

    unsigned long c = (unsigned long)i;

    for (k = 0; k < 8; k++) c = c & 1 ? 0xedb88320 ^ (c >> 1) : c >> 1;

    crc_table[i] = c;

  }

  /* Calculate crc on buf */

  crc = crc ^ 0xffffffffL;

  while (len--) crc = crc_table[((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8);

  return crc ^ 0xffffffffL;

}

int crc_cmd (int argc, char *argv[])

{

  unsigned long addr = global.src_addr;

  unsigned long len = global.length;

  unsigned long init_crc = 0;

  switch (argc) {

    case 3: init_crc = strtoul (argv[2], 0, 0);

    case 2: len = strtoul (argv[1], 0, 0);

    case 1: addr = strtoul (argv[0], 0, 0);

    case 0:

      printf ("CRC [%08lx-%08lx] = %08lx\n", addr, addr + len - 1, crc32 (init_crc, (unsigned char *)addr, len));

      return 0;

  }

  return -1;

}

void module_memory_init (void)

{

  register_command ("dm", "<start addr> [<end addr>]", "display 32-bit memory location(s)", dm_cmd);

  register_command ("pm", "<addr> [<stop_addr>] <value>", "patch 32-bit memory location(s)", pm_cmd);

  register_command ("ram_test", "<start_addr> <stop_addr> [<test_no>]", "run a simple RAM test\n", ram_test_cmd);

  register_command ("crc", "[<src_addr> [<length> [<init_crc>]]]", "Calculates a 32-bit CRC on specified memory region\n", crc_cmd);

}