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authorTimothy Pearson <tpearson@raptorengineeringinc.com>2015-09-13 15:54:32 -0500
committerMartin Roth <martinroth@google.com>2015-12-01 16:59:01 +0100
commit273384638b4f4fbe8e500025d8941bd2e54b5f8a (patch)
treefe4da96726bc7178bc9794eb406843652d942861 /src
parentf8549e88e243721ac1b26373a774612b66ac8ef2 (diff)
downloadcoreboot-273384638b4f4fbe8e500025d8941bd2e54b5f8a.tar.xz
cpu/amd/fam10h-15h: Enable DFE on Family 15h HT3 links
Decision Feedback Equalization (DFE) is a form of dynamic link training used to lower the overall error rate within the coherent fabric. Enable it on all capable HT links. Change-Id: I5e719984ddd723f9e375ff1a9d4fa1ef042cf3eb Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com> Reviewed-on: https://review.coreboot.org/12072 Tested-by: build bot (Jenkins) Reviewed-by: Felix Held <felix-coreboot@felixheld.de> Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
Diffstat (limited to 'src')
-rw-r--r--src/cpu/amd/family_10h-family_15h/defaults.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/cpu/amd/family_10h-family_15h/defaults.h b/src/cpu/amd/family_10h-family_15h/defaults.h
index 28df747971..57c05187f0 100644
--- a/src/cpu/amd/family_10h-family_15h/defaults.h
+++ b/src/cpu/amd/family_10h-family_15h/defaults.h
@@ -840,4 +840,12 @@ static const struct {
{ 0xC0, AMD_FAM15_ALL, AMD_PTYPE_ALL, HTPHY_LINKTYPE_ALL,
0x40040000, 0xe01F0000 }, /* [31:29] RttCtl = 02h,
[20:16] RttIndex = 04h */
+
+ { 0xc4, AMD_FAM15_ALL, AMD_PTYPE_ALL, HTPHY_LINKTYPE_HT3,
+ 0x00013480, 0x0003fc80 }, /* [17:10] DCV = 0x4d,
+ [7] DfeEn = 0x1 */
+
+ { 0xd4, AMD_FAM15_ALL, AMD_PTYPE_ALL, HTPHY_LINKTYPE_HT3,
+ 0x00013480, 0x0003fc80 }, /* [17:10] DCV = 0x4d,
+ [7] DfeEn = 0x1 */
};