Hardware
/
litex
mirror of https://github.com/enjoy-digital/litex.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #1258 from antmicro/4_bit_dqs 

Make memtest work with 4x DQ / DQS ratio
This commit is contained in:
enjoy-digital 2022-03-31 17:21:07 +02:00 committed by GitHub
parent aa3506a393 f49d2953ed
commit 80b309d1a4
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
litex/soc/software/liblitedram/sdram.c
View File

@ -346,9 +346,19 @@ static unsigned int sdram_write_read_check_test_pattern(int module, unsigned int
/* Verify bytes matching current 'module' */
for (int i = 0; i < DFII_PIX_DATA_BYTES; ++i) {
int j = p * DFII_PIX_DATA_BYTES + i;
#if SDRAM_PHY_DQ_DQS_RATIO == 4
if (j % (SDRAM_PHY_MODULES/2) == ((SDRAM_PHY_MODULES-1)/2)-(module/2)) {
if(module % 2) {
errors += popcount((prs[p][i] & 0xf0) ^ (tst[i] & 0xf0));
} else {
errors += popcount((prs[p][i] & 0x0f) ^ (tst[i] & 0x0f));
}
}
#else
if (j % SDRAM_PHY_MODULES == SDRAM_PHY_MODULES-1-module) {
errors += popcount(prs[p][i] ^ tst[i]);
}
#endif
}
}
@ -636,7 +646,11 @@ static int sdram_write_leveling_scan(int *delays, int loops, int show)
ddrphy_wlevel_strobe_write(1);
cdelay(100);
csr_rd_buf_uint8(sdram_dfii_pix_rddata_addr(0), buf, DFII_PIX_DATA_BYTES);
#if SDRAM_PHY_DQ_DQS_RATIO == 4
if (buf[SDRAM_PHY_MODULES-1-(i/2)] != 0)
#else
if (buf[SDRAM_PHY_MODULES-1-i] != 0)
#endif
one_count++;
else
zero_count++;