diff options
Diffstat (limited to 'src/soc/intel/broadwell/raminit.c')
| -rw-r--r-- | src/soc/intel/broadwell/raminit.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/soc/intel/broadwell/raminit.c b/src/soc/intel/broadwell/raminit.c index 95073d3194..70f38043cd 100644 --- a/src/soc/intel/broadwell/raminit.c +++ b/src/soc/intel/broadwell/raminit.c @@ -177,6 +177,17 @@ static void setup_sdram_meminfo(struct pei_data *pei_data) } } +/* + * 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); +} + void perform_raminit(const struct chipset_power_state *const power_state) { const int s3resume = power_state->prev_sleep_state == ACPI_S3; @@ -186,6 +197,15 @@ void perform_raminit(const struct chipset_power_state *const power_state) mainboard_fill_pei_data(&pei_data); mainboard_fill_spd_data(&pei_data); + /* 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); + + for (size_t i = 0; i < ARRAY_SIZE(pei_data.spd_addresses); i++) { + const uint8_t addr = pei_data.spd_addresses[i]; + pei_data.spd_addresses[i] = addr == SPD_MEMORY_DOWN ? 0 : addr; + } + post_code(0x32); timestamp_add_now(TS_INITRAM_START); |