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software/bios/sdram: select the type of data we want to generate for memtest with TEST_RANDOM_DATA (debugging hardware is easier with a simple counter)

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This commit is contained in:
Florent Kermarrec 2015-03-26 22:16:31 +01:00
parent 257706517e
commit e79a716425
2 changed files with 18 additions and 8 deletions
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25
software/bios/sdram.c
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@ -423,15 +423,24 @@ int sdrlevel(void)
#endif /* CSR_DDRPHY_BASE */
#define TEST_SIZE (2*1024*1024)
#define TEST_RANDOM_DATA 1
#define ONEZERO 0xAAAAAAAA
#define ZEROONE 0x55555555
unsigned int seed_to_data(unsigned int seed, int random)
{
if (random)
return 1664525*seed + 1013904223;
else
return seed + 1;
}
int memtest_silent(void)
{
volatile unsigned int *array = (unsigned int *)MAIN_RAM_BASE;
int i;
unsigned int prv;
unsigned int seed;
unsigned int error_cnt;
/* test data bus */
@ -453,18 +462,18 @@ int memtest_silent(void)
error_cnt++;
}
/* test random data */
prv = 0;
/* test counter or random data */
seed = 0;
for(i=0;i<TEST_SIZE/4;i++) {
prv = 1664525*prv + 1013904223;
array[i] = prv;
seed = seed_to_data(seed, TEST_RANDOM_DATA);
array[i] = seed;
}
prv = 0;
seed = 0;
error_cnt = 0;
for(i=0;i<TEST_SIZE/4;i++) {
prv = 1664525*prv + 1013904223;
if(array[i] != prv)
seed = seed_to_data(seed, TEST_RANDOM_DATA);
if(array[i] != seed)
error_cnt++;
}
return error_cnt;

1
software/bios/sdram.h
View file

@ -17,6 +17,7 @@ void sdrwloff(void);
int sdrlevel(void);
#endif
unsigned int seed_to_data(unsigned int seed, int random);
int memtest_silent(void);
int memtest(void);
int sdrinit(void);