diff options
| author | Nico Huber <nico.h@gmx.de> | 2016-11-26 02:03:25 +0100 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2016-11-28 17:56:34 +0100 |
| commit | 3c20906e42ed5bf7ef5202fa9eb38c574e43b688 (patch) | |
| tree | 750851e2fe8c4729b004db3680ba936ffd71df6c /src/northbridge/intel | |
| parent | d85a71a75c35b5bf683939e320ff7a501f89f583 (diff) | |
nb/intel/x4x/raminit: Fix DIMM_IN_CHANNEL calculation
Fix-up for 696abfc
nb/intel/x4x: Fix and deflate `dimm_config` in raminit
It didn't fix the channel-number shifting issue as intended.
The channel index is either 0 or 1. DIMMs are counted from 0
to 3 where 0..1 covers channel 0, and 2..3 covers channel 1.
Since we have two DIMMs per channel, we have to multiply the
channel index by 2 (or shift it left by 1) to get the index
of the first DIMM in the channel. Finally, to get the offset
of a DIMM in the channel we take its index modulo 2 (again,
the number of DIMMs per channel).
Change-Id: I2784b0cb655bfe823bf5fa48b722623dfca1ddc3
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/17612
Tested-by: build bot (Jenkins)
Reviewed-by: Damien Zammit <damien@zamaudio.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Diffstat (limited to 'src/northbridge/intel')
| -rw-r--r-- | src/northbridge/intel/x4x/raminit.c | 3 | ||||
| -rw-r--r-- | src/northbridge/intel/x4x/x4x.h | 3 |
2 files changed, 4 insertions, 2 deletions
diff --git a/src/northbridge/intel/x4x/raminit.c b/src/northbridge/intel/x4x/raminit.c index 0867c31e8e..122cab50ea 100644 --- a/src/northbridge/intel/x4x/raminit.c +++ b/src/northbridge/intel/x4x/raminit.c @@ -153,7 +153,8 @@ static void sdram_read_spds(struct sysinfo *s) else die("Dual-rank x16 not supported\n"); } - s->dimm_config[chan] |= dimm_config << (i - chan) * 2; + s->dimm_config[chan] |= + dimm_config << (i % DIMMS_PER_CHANNEL) * 2; } printk(BIOS_DEBUG, " Config[CH%d] : %d\n", chan, s->dimm_config[chan]); } diff --git a/src/northbridge/intel/x4x/x4x.h b/src/northbridge/intel/x4x/x4x.h index b3493691cf..e4eb8dd3b9 100644 --- a/src/northbridge/intel/x4x/x4x.h +++ b/src/northbridge/intel/x4x/x4x.h @@ -144,6 +144,7 @@ #define TOTAL_CHANNELS 2 #define TOTAL_DIMMS 4 +#define DIMMS_PER_CHANNEL (TOTAL_DIMMS / TOTAL_CHANNELS) #define RAW_CARD_UNPOPULATED 0xff #define DIMM_IS_POPULATED(dimms, idx) (dimms[idx].card_type != RAW_CARD_UNPOPULATED) @@ -162,7 +163,7 @@ #define FOR_EACH_POPULATED_DIMM(dimms, idx) \ FOR_EACH_DIMM(idx) IF_DIMM_POPULATED(dimms, idx) #define FOR_EACH_DIMM_IN_CHANNEL(ch, idx) \ - for (idx = (ch); idx < (ch) + 2; ++idx) + for (idx = (ch) << 1; idx < ((ch) << 1) + DIMMS_PER_CHANNEL; ++idx) #define FOR_EACH_POPULATED_DIMM_IN_CHANNEL(dimms, ch, idx) \ FOR_EACH_DIMM_IN_CHANNEL(ch, idx) IF_DIMM_POPULATED(dimms, idx) #define CHANNEL_IS_POPULATED(dimms, idx) ((dimms[idx<<1].card_type != RAW_CARD_UNPOPULATED) || (dimms[(idx<<1) + 1].card_type != RAW_CARD_UNPOPULATED)) |