diff options
Diffstat (limited to 'src/northbridge')
| -rw-r--r-- | src/northbridge/intel/haswell/romstage.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/northbridge/intel/haswell/romstage.c b/src/northbridge/intel/haswell/romstage.c index ee211beab1..7c27827921 100644 --- a/src/northbridge/intel/haswell/romstage.c +++ b/src/northbridge/intel/haswell/romstage.c @@ -23,6 +23,17 @@ void __weak mb_late_romstage_setup(void) { } +/* + * 0 = leave channel enabled + * 1 = disable dimm 0 on channel + * 2 = disable dimm 1 on channel + * 3 = disable dimm 0+1 on channel + */ +static int make_channel_disabled_mask(const struct pei_data *pd, int ch) +{ + return (!pd->spd_addresses[ch + ch] << 0) | (!pd->spd_addresses[ch + ch + 1] << 1); +} + /* The romstage entry point for this platform is not mainboard-specific, hence the name */ void mainboard_romstage_entry(void) { @@ -73,6 +84,10 @@ void mainboard_romstage_entry(void) /* MRC has hardcoded assumptions of 2 meaning S3 wake. Normalize it here. */ pei_data.boot_mode = wake_from_s3 ? 2 : 0; + /* Calculate unimplemented DIMM slots for each channel */ + pei_data.dimm_channel0_disabled = make_channel_disabled_mask(&pei_data, 0); + pei_data.dimm_channel1_disabled = make_channel_disabled_mask(&pei_data, 1); + timestamp_add_now(TS_BEFORE_INITRAM); report_platform_info(); |