Subversion Repositories timestamp

/**

 ** timestamp APU HW under Linux

 **/

#include <inttypes.h>

#include <sys/mman.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

#include <stdio.h>

/******/

/* ex xpseudo_asm_gcc.h: */

#define UDI0FCM_IMM_GPR_GPR(a, b, c)                    \

  __asm__ __volatile__("udi0fcm " #a ",%0,%1" : : "r"(b), "r"(c))

/******/

#define UDI_TSTAMP(id) __asm__ __volatile__("udi0fcm 0,%0,%0" : : "r"(id))

void *map_bram(uint32_t addr, uint32_t len) {

  int fd;

  unsigned long page_size;

  void *mem;

  if ((fd = open("/dev/mem", O_RDWR|O_SYNC)) < 0) {

    perror("open /dev/mem");

    return NULL;

  }

  page_size = getpagesize();

  mem = mmap(NULL, len, PROT_WRITE|PROT_READ,

             MAP_SHARED, fd, addr & ~(page_size-1));

  mem += addr & (page_size-1);

  return mem;

}

int main() {

  uint32_t *bram = map_bram(0xcc000000, 0x1000);

  char c;

  int a, b, i;

  for (i = 0; i < 0x400; i++)

    bram[i] = 0;

  printf("Go!\r\n");

  for (;;) {

    c = getchar();

    UDI_TSTAMP(1);

    UDI_TSTAMP(0xdeadbeef);

    for (i = 0; i < 0x400; i += 2)

      if (bram[i] != 0)

        printf("%02x: (0x%08x) 0x%08x\r\n", i/2, bram[i], bram[i+1]);

    printf("--\r\n");

  }

  return 0;

}