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ddr_test.c
132 lines (103 loc) · 2.69 KB
/
ddr_test.c
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#include <includes.h>
#include <math.h>
#define wr(reg, val) *(volatile unsigned *)(reg) = (val)
#define rd(reg) (*(volatile unsigned *)(reg))
#define TEST_SIZE 16*1024*1024
#define TEST_DATA_A 0x0000ffff
#define TEST_DATA_B 0x5555aaaa
unsigned *test_buff = 0;
void my_set_freq(unsigned m, unsigned n)
{
unsigned tmp;
tmp = rd(0xc1100a08);
tmp &= ~(0x3fff);
tmp |= (((0x1f & n)<<9) | (0x1ff & m));
wr(0xc1100a08, tmp);
tmp = 10000;
while(--tmp);
while((rd(0xc1100a40) & (1<<15)) == 0);
}
static float my_get_freq(void)
{
unsigned m, n;
float clk;
m = rd(0xc1100a08) & 0x1ff;
n = ((rd(0xc1100a08)>>9) & 0x1f);
clk = (float)27 * m / n;
return clk;
}
static void ddr_write(unsigned m_val)
{
unsigned *p;
unsigned i;
printf("Start testing 0x%08x.\n",m_val);
p = test_buff;
for(i=0;i<TEST_SIZE/4;i++)
{
*p = m_val;
++p;
}
}
static void ddr_read(unsigned m_val)
{
unsigned *p;
unsigned e_num = 0;
unsigned e_buff = 0;
unsigned i;
p = test_buff;
for(i=0;i<TEST_SIZE/4;i++)
{
if(*p != m_val)
{
if(e_buff != *p)
{
if(e_num)
{
printf("Error buffer is 0x%x, error number %u, opposite addr is 0x%08x\n",e_buff, e_num, i*4);
e_num = 0;
}
e_buff = *p;
}
++e_num;
}
else
{
if(e_num)
{
printf("Error buffer is 0x%x, error number %u, opposite addr is 0x%08x\n",e_buff, e_num, i*4);
e_num = 0;
e_buff = 0;
}
}
++p;
}
printf("Test 0x%08x finished.\n", m_val);
}
void ddr_test()
{
unsigned clk_num;
unsigned rand_num;
test_buff = (unsigned *)AVMem_malloc(TEST_SIZE);
if(test_buff)
printf("Malloc memory OK.\n");
else
{
printf("Malloc memory failed.Exit test.\n");
return;
}
while(1)
{
printf("Plz input CLK:\n");
scanf("%d", &clk_num);
my_set_freq(clk_num, 27);
printf("DDR CLK is %fMhz\n", my_get_freq());
ddr_write(TEST_DATA_A);
ddr_read(TEST_DATA_A);
ddr_write(TEST_DATA_B);
ddr_read(TEST_DATA_B);
srand(AVTimeGet());
rand_num = (unsigned)rand();
ddr_write(rand_num);
ddr_read(rand_num);
}
}