diff options
Diffstat (limited to 'src/northbridge/intel/sandybridge/raminit.c')
| -rw-r--r-- | src/northbridge/intel/sandybridge/raminit.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/src/northbridge/intel/sandybridge/raminit.c b/src/northbridge/intel/sandybridge/raminit.c index 63e951f00a..f3a1ba5f41 100644 --- a/src/northbridge/intel/sandybridge/raminit.c +++ b/src/northbridge/intel/sandybridge/raminit.c @@ -361,11 +361,16 @@ static int verify_crc16_spds_ddr3(spd_raw_data *spd, ramctr_timing *ctrl) return match; } -void read_spd(spd_raw_data * spd, u8 addr) +void read_spd(spd_raw_data * spd, u8 addr, bool id_only) { int j; - for (j = 0; j < 256; j++) - (*spd)[j] = do_smbus_read_byte(SMBUS_IO_BASE, addr, j); + if (id_only) { + for (j = 117; j < 128; j++) + (*spd)[j] = do_smbus_read_byte(SMBUS_IO_BASE, addr, j); + } else { + for (j = 0; j < 256; j++) + (*spd)[j] = do_smbus_read_byte(SMBUS_IO_BASE, addr, j); + } } static void dram_find_spds_ddr3(spd_raw_data *spd, ramctr_timing *ctrl) @@ -4235,14 +4240,12 @@ static void init_dram_ddr3(int mobile, int min_tck, int s3resume) ctrl_cached = (ramctr_timing *)mrc_cache->mrc_data; } - - if (!s3resume) { - memset(spds, 0, sizeof(spds)); - mainboard_get_spd(spds); - } - /* verify MRC cache for fast boot */ if (!s3resume && ctrl_cached) { + /* Load SPD unique information data. */ + memset(spds, 0, sizeof(spds)); + mainboard_get_spd(spds, 1); + /* check SPD CRC16 to make sure the DIMMs haven't been replaced */ fast_boot = verify_crc16_spds_ddr3(spds, ctrl_cached); if (!fast_boot) @@ -4273,6 +4276,8 @@ static void init_dram_ddr3(int mobile, int min_tck, int s3resume) ctrl.tCK = min_tck; /* Get DDR3 SPD data */ + memset(spds, 0, sizeof(spds)); + mainboard_get_spd(spds, 0); dram_find_spds_ddr3(spds, &ctrl); err = try_init_dram_ddr3(&ctrl, fast_boot, s3resume, me_uma_size); |