Subversion Repositories openrisc_2011-10-31

/*

 * SDRAM row/bank test

 *

 * Tests accessing different rows on different banks

 *

*/

#include "cpu-utils.h"

#include "board.h"

#include "sdram.h"

#define NUM_SDRAM_BANKS 4

#define SDRAM_BANK_SIZE (SDRAM_SIZE / NUM_SDRAM_BANKS)

#define SDRAM_BANK_START(bank) ((SDRAM_BANK_SIZE*bank) + SDRAM_BASE)

#define SDRAM_BANK_LAST_WORD(bank) ((SDRAM_BANK_START((bank+1)))-4)

#define SDRAM_BANK_MIDDLE_WORD(bank) ((SDRAM_BANK_START((bank)))+(SDRAM_BANK_SIZE/2))

int main()

{

  REG32(SDRAM_BANK_LAST_WORD(0))   = 0x00001111;

  REG32(SDRAM_BANK_MIDDLE_WORD(1)) = 0x22223333;

  REG32(SDRAM_BANK_LAST_WORD(1))   = 0x44445555;

  REG32(SDRAM_BANK_MIDDLE_WORD(2)) = 0x66667777;

  REG32(SDRAM_BANK_LAST_WORD(2))   = 0x88889999;

  REG32(SDRAM_BANK_MIDDLE_WORD(3)) = 0xaaaabbbb;

  REG32(SDRAM_BANK_LAST_WORD(3))   = 0xccccdddd;

  unsigned long read_result = 0;

  read_result += REG32(SDRAM_BANK_LAST_WORD(0));

  read_result += REG32(SDRAM_BANK_MIDDLE_WORD(1));

  read_result += REG32(SDRAM_BANK_LAST_WORD(1));

  read_result += REG32(SDRAM_BANK_MIDDLE_WORD(2));

  read_result += REG32(SDRAM_BANK_LAST_WORD(2));

  read_result += REG32(SDRAM_BANK_MIDDLE_WORD(3));

  read_result += REG32(SDRAM_BANK_LAST_WORD(3));

  report(read_result);

  // read_result should be 0xCCCD4441

  exit((read_result^0x4ccd444c)); /* should result in 8000000d */

}