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software/liblitedram: switch to uint32_t (as workaround for #322) and expose burst_length/random parameters to sdram_bist command.

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This commit is contained in:
Florent Kermarrec 2020-10-29 17:03:28 +01:00
parent 07503d22ac
commit 7bcf8cb752
2 changed files with 40 additions and 16 deletions
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19
litex/soc/software/bios/cmds/cmd_litedram.c
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@ -65,7 +65,24 @@ define_command(sdram_test, sdram_test_handler, "Test SDRAM", LITEDRAM_CMDS);
#if defined(CSR_SDRAM_GENERATOR_BASE) && defined(CSR_SDRAM_CHECKER_BASE)
static void sdram_bist_handler(int nb_params, char **params)
{
sdram_bist(128, 0);
char *c;
int burst_length;
int random;
if (nb_params < 2) {
printf("sdram_bist <burst_length> <random>");
return;
}
burst_length = strtoul(params[0], &c, 0);
if (*c != 0) {
printf("Incorrect burst_length");
return;
}
random = strtoul(params[1], &c, 0);
if (*c != 0) {
printf("Incorrect random");
return;
}
sdram_bist(burst_length, random);
}
define_command(sdram_bist, sdram_bist_handler, "Run SDRAM Build-In Self-Test", LITEDRAM_CMDS);
#endif

37
litex/soc/software/liblitedram/bist.c
View file

@ -15,11 +15,11 @@
#define SDRAM_TEST_BASE 0x00000000
#define SDRAM_TEST_DATA_BYTES (CSR_SDRAM_DFII_PI0_RDDATA_SIZE*4)
uint64_t wr_ticks;
uint64_t wr_length;
uint64_t rd_ticks;
uint64_t rd_length;
uint64_t rd_errors;
uint32_t wr_ticks;
uint32_t wr_length;
uint32_t rd_ticks;
uint32_t rd_length;
uint32_t rd_errors;
__attribute__((unused)) static void cdelay(int i)
{
@ -61,6 +61,7 @@ static uint32_t pseudo_random_bases[128] = {
0x000ea9a1,0x00222753,0x002b8ade,0x000e4757,
0x00259169,0x0037a663,0x00143e83,0x003a139e,
0x00006a57,0x0021b6bb,0x0016de10,0x000d9ede,
0x00263370,0x001975eb,0x0013903c,0x002fdc68,
0x0014ada3,0x000012bd,0x00297df2,0x003e8aa1,
0x00027e36,0x000e51ae,0x002e7627,0x00275c9f,
};
@ -120,20 +121,24 @@ static void sdram_bist_loop(uint32_t loop, uint32_t burst_length, uint32_t rando
/* Get read results */
rd_ticks += sdram_checker_ticks_read();
rd_errors += sdram_checker_errors_read();
rd_length += length;
}
}
static uint64_t compute_speed(uint64_t length, uint64_t ticks) {
uint64_t speed;
speed = (8*length*CONFIG_CLOCK_FREQUENCY)/ticks;
static uint32_t compute_speed_mibs(uint32_t length, uint32_t ticks) {
uint32_t speed;
//printf("(%lu, %lu)", length, ticks);
speed = length*(CONFIG_CLOCK_FREQUENCY/(1024*1024))/ticks;
return speed;
}
void sdram_bist(uint32_t burst_length, uint32_t random)
{
uint32_t i;
uint64_t total_length;
uint64_t total_errors;
uint32_t total_length;
uint32_t total_errors;
printf("Starting SDRAM BIST with burst_length=%d and random=%d\n", burst_length, random);
i = 0;
total_length = 0;
@ -147,16 +152,18 @@ void sdram_bist(uint32_t burst_length, uint32_t random)
sdram_bist_loop(i, burst_length, random);
/* Results */
if (i%1000 == 0)
printf("WR-SPEED(Mbps) RD-SPEED(Mbps) TESTED(MiB) ERRORS\n");
if (i%1000 == 0) {
printf("WR-SPEED(MiB/s) RD-SPEED(MiB/s) TESTED(MiB) ERRORS\n");
}
if (i%100 == 100-1) {
printf("%14lld %14lld %11lld %12lld\n",
compute_speed(wr_length, wr_ticks),
compute_speed(rd_length, rd_ticks),
printf("%15u %15u %12u %12u\n",
compute_speed_mibs(wr_length, wr_ticks),
compute_speed_mibs(rd_length, rd_ticks),
total_length/(1024*1024),
total_errors);
total_length += wr_length;
total_errors += rd_errors;
/* Clear length/ticks/errors */
wr_length = 0;
wr_ticks = 0;