diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/intel/cannonlake/include/soc/cnl_memcfg_init.h | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/src/soc/intel/cannonlake/include/soc/cnl_memcfg_init.h b/src/soc/intel/cannonlake/include/soc/cnl_memcfg_init.h index c602180592..e602a33f78 100644 --- a/src/soc/intel/cannonlake/include/soc/cnl_memcfg_init.h +++ b/src/soc/intel/cannonlake/include/soc/cnl_memcfg_init.h @@ -52,17 +52,19 @@ struct spd_info { /* Board-specific memory dq mapping information */ struct cnl_mb_cfg { /* - * For each channel, there are 3 sets of DQ byte mappings, + * For each channel, there are 6 sets of DQ byte mappings, * where each set has a package 0 and a package 1 value (package 0 * represents the first 64-bit lpddr4 chip combination, and package 1 * represents the second 64-bit lpddr4 chip combination). * The first three sets are for CLK, CMD, and CTL. - * The fsp package actually expects 6 sets, but the last 3 sets are - * not used in CNL, so we only define the three sets that are used - * and let the meminit_lpddr4() routine take care of clearing the + * The fsp package actually expects 6 sets, even though the last 3 sets + * are not used in CNL. + * We let the meminit_lpddr4() routine take care of clearing the * unused fields for the caller. + * Note that dq_map is only used by LPDDR; it does not need to be + * initialized for designs using DDR4. */ - uint8_t dq_map[DDR_NUM_CHANNELS][3][DDR_NUM_PACKAGES]; + uint8_t dq_map[DDR_NUM_CHANNELS][6][DDR_NUM_PACKAGES]; /* * DQS CPU<>DRAM map Ch0 and Ch1. Each array entry represents a @@ -70,6 +72,8 @@ struct cnl_mb_cfg { * the memory part. The array index represents the dqs bit number * on the memory part, and the values in the array represent which * pin on the CPU that DRAM pin connects to. + * dqs_map is only used by LPDDR; same comments apply as for dq_map + * above. */ uint8_t dqs_map[DDR_NUM_CHANNELS][DQ_BITS_PER_DQS]; |