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| author | Timothy Pearson <tpearson@raptorengineeringinc.com> | 2016-03-20 14:21:53 -0500 |
|---|---|---|
| committer | Timothy Pearson <tpearson@raptorengineeringinc.com> | 2016-03-21 20:30:30 +0100 |
| commit | f7d4f73053f0c26bfe411a9f3ef86f98389538b5 (patch) | |
| tree | ba887ea31ce6b3579d08328635038583a4451917 /src/northbridge | |
| parent | a4d81809137b8b53903303b201c2d1bfbc615143 (diff) | |
| download | coreboot-f7d4f73053f0c26bfe411a9f3ef86f98389538b5.tar.xz | |
nb/amd/amdmct/mct_ddr3: Ensure BlockRxDqsLock does not remain set
Under certain conditions (training abort) BlockRxDqsLock could
remain set in violation of the BKDG. Ensure BlockRxDqsLock is
reset to 0 after a lane training abort.
Change-Id: I1a49a24d02b2b7cacae074794ec274a424a9e66b
Reviewed-on: https://review.coreboot.org/14144
Tested-by: build bot (Jenkins)
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'src/northbridge')
| -rw-r--r-- | src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c b/src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c index 15b5ea4fcb..5d75fb0392 100644 --- a/src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c +++ b/src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c @@ -1725,6 +1725,12 @@ static void TrainDQSReceiverEnCyc_D_Fam15(struct MCTStatStruc *pMCTstat, "Training for receiver %d on DCT %d aborted\n", __func__, lane, Receiver, dct); } + + /* Restore BlockRxDqsLock setting to normal operation in preparation for retraining */ + dword = Get_NB32_index_wait_DCT(dev, dct, index_reg, 0x0d0f0030 | (lane << 8)); + dword &= ~(0x1 << 8); /* BlockRxDqsLock = 0 */ + Set_NB32_index_wait_DCT(dev, dct, index_reg, 0x0d0f0030 | (lane << 8), dword); + break; } |