From e17ac6e74b96102528fa4915d6cebcb55f8e5db0 Mon Sep 17 00:00:00 2001 From: Timothy Pearson Date: Fri, 7 Aug 2015 19:05:45 -0500 Subject: [PATCH 099/143] northbridge/amd/amdht: Fix poor performance on Family 15h CPUs Change-Id: I37db191c144c81aba5d4a1e6291db5669a35a31a Signed-off-by: Timothy Pearson --- src/northbridge/amd/amdht/h3ncmn.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/src/northbridge/amd/amdht/h3ncmn.c b/src/northbridge/amd/amdht/h3ncmn.c index e03e5eb..e377ff2 100644 --- a/src/northbridge/amd/amdht/h3ncmn.c +++ b/src/northbridge/amd/amdht/h3ncmn.c @@ -1559,6 +1559,10 @@ static void setLinkData(sMainData *pDat, cNorthBridge *nb) } else { temp2 = 0x0; } + /* NOTE + * The Family 15h BKDG Rev. 3.14 is wrong + * Freq[4] must be set before Freq[3:0], otherwise the register writes will be ignored! + */ if (is_gt_rev_d()) AmdPCIWriteBits(linkBase + HTHOST_FREQ_REV_REG_2, 0, 0, &temp2); AmdPCIWriteBits(linkBase + HTHOST_FREQ_REV_REG, 11, 8, &temp); -- 1.7.9.5