diff options
Diffstat (limited to 'src/northbridge/intel/sandybridge/raminit.c')
| -rw-r--r-- | src/northbridge/intel/sandybridge/raminit.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/src/northbridge/intel/sandybridge/raminit.c b/src/northbridge/intel/sandybridge/raminit.c index 59f3b3b834..40089e2cdb 100644 --- a/src/northbridge/intel/sandybridge/raminit.c +++ b/src/northbridge/intel/sandybridge/raminit.c @@ -284,7 +284,7 @@ void read_spd(spd_raw_data * spd, u8 addr) static void dram_find_spds_ddr3(spd_raw_data * spd, dimm_info * dimm, ramctr_timing * ctrl) { - int dimms = 0; + int dimms = 0, dimms_on_channel; int channel, slot, spd_slot; memset (ctrl->rankmap, 0, sizeof (ctrl->rankmap)); @@ -295,9 +295,37 @@ static void dram_find_spds_ddr3(spd_raw_data * spd, dimm_info * dimm, FOR_ALL_CHANNELS { ctrl->channel_size_mb[channel] = 0; + dimms_on_channel = 0; + /* count dimms on channel */ for (slot = 0; slot < NUM_SLOTS; slot++) { spd_slot = 2 * channel + slot; spd_decode_ddr3(&dimm->dimm[channel][slot], spd[spd_slot]); + if (dimm->dimm[channel][slot].dram_type == SPD_MEMORY_TYPE_SDRAM_DDR3) + dimms_on_channel++; + } + + for (slot = 0; slot < NUM_SLOTS; slot++) { + spd_slot = 2 * channel + slot; + /* search for XMP profile */ + spd_xmp_decode_ddr3(&dimm->dimm[channel][slot], + spd[spd_slot], + DDR3_XMP_PROFILE_1); + + if (dimm->dimm[channel][slot].dram_type != SPD_MEMORY_TYPE_SDRAM_DDR3) { + printram("No valid XMP profile found.\n"); + spd_decode_ddr3(&dimm->dimm[channel][slot], spd[spd_slot]); + } else if (dimms_on_channel > dimm->dimm[channel][slot].dimms_per_channel) { + printram("XMP profile supports %u DIMMs, but %u DIMMs are installed.\n", + dimm->dimm[channel][slot].dimms_per_channel, + dimms_on_channel); + spd_decode_ddr3(&dimm->dimm[channel][slot], spd[spd_slot]); + } else if (dimm->dimm[channel][slot].voltage != 1500) { + /* TODO: support other DDR3 voltage than 1500mV */ + printram("XMP profile's requested %u mV is unsupported.\n", + dimm->dimm[channel][slot].voltage); + spd_decode_ddr3(&dimm->dimm[channel][slot], spd[spd_slot]); + } + if (dimm->dimm[channel][slot].dram_type != SPD_MEMORY_TYPE_SDRAM_DDR3) { // set dimm invalid dimm->dimm[channel][slot].ranks = 0; |