path: root/resources/libreboot/patch/kgpe-d16/0096-northbridge-amd-amdht-Add-support-for-HT3-2.8GHz-and.patch

From e6a4225860ce1c83c5489fc2169fb7dc22225462 Mon Sep 17 00:00:00 2001
From: Timothy Pearson <tpearson@raptorengineeringinc.com>
Date: Sun, 2 Aug 2015 21:36:24 -0500
Subject: [PATCH 096/143] northbridge/amd/amdht: Add support for HT3 2.8GHz
 and up link frequencies

Change-Id: Ifa1592d26ba7deb034046fd3f2a15149117d9a76
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
---
 src/cpu/amd/family_10h-family_15h/defaults.h |    8 ++-
 src/mainboard/asus/kgpe-d16/cmos.layout      |   30 ++++-----
 src/northbridge/amd/amdht/h3ffeat.h          |    6 +-
 src/northbridge/amd/amdht/h3finit.c          |   93 ++++++++++++++++----------
 src/northbridge/amd/amdht/h3finit.h          |   18 +++--
 src/northbridge/amd/amdht/h3ncmn.c           |   82 ++++++++++++++++-------
 src/northbridge/amd/amdht/h3ncmn.h           |    3 +-
 7 files changed, 155 insertions(+), 85 deletions(-)

diff --git a/src/cpu/amd/family_10h-family_15h/defaults.h b/src/cpu/amd/family_10h-family_15h/defaults.h
index 1080cfc..bff2efd 100644
--- a/src/cpu/amd/family_10h-family_15h/defaults.h
+++ b/src/cpu/amd/family_10h-family_15h/defaults.h
@@ -290,7 +290,13 @@ static const struct {
 
 	/* Link Global Retry Control Register */
 	{ 0, 0x150, (AMD_FAM10_ALL | AMD_FAM15_ALL), AMD_PTYPE_ALL,
-	  0x00073900, 0x00073F00 },
+	  0x00073900, 0x00073f70 },	/* TotalRetryAttempts = 0x7,
+					   HtRetryCrcDatInsDynEn = 0x1,
+					   HtRetryCrcCmdPackDynEn = 0x1,
+					   HtRetryCrcDatIns = 0x4,
+					   HtRetryCrcCmdPack = 0x1,
+					   ForceErrType = 0x0,
+					   MultRetryErr = 0x0 */
 
 	/*  Errata 351
 	 * System software should program the Link Extended Control Registers[LS2En]
diff --git a/src/mainboard/asus/kgpe-d16/cmos.layout b/src/mainboard/asus/kgpe-d16/cmos.layout
index f705af2..ec803b6 100644
--- a/src/mainboard/asus/kgpe-d16/cmos.layout
+++ b/src/mainboard/asus/kgpe-d16/cmos.layout
@@ -125,21 +125,21 @@ enumerations
 10    21    42ms
 10    22    84ms
 11    0     Auto
-11    1     2.6GHz
-11    2     2.4GHz
-11    3     2.2GHz
-11    4     2.0GHz
-11    5     1.8GHz
-11    6     1.6GHz
-11    7     1.4GHz
-11    8     1.2GHz
-11    9     1.0GHz
-11    10    800MHz
-11    11    600MHz
-11    12    500MHz
-11    13    400MHz
-11    14    300MHz
-11    15    200MHz
+11    1     3.2GHz
+11    2     3.0GHz
+11    3     2.8GHz
+11    4     2.6GHz
+11    5     2.4GHz
+11    6     2.2GHz
+11    7     2.0GHz
+11    8     1.8GHz
+11    9     1.6GHz
+11    10    1.4GHz
+11    11    1.2GHz
+11    12    1.0GHz
+11    13    800MHz
+11    14    600MHz
+11    15    500MHz
 12    0     1.5V
 12    1     1.35V
 12    2     1.25V
diff --git a/src/northbridge/amd/amdht/h3ffeat.h b/src/northbridge/amd/amdht/h3ffeat.h
index 5d9550b..5dc9916 100644
--- a/src/northbridge/amd/amdht/h3ffeat.h
+++ b/src/northbridge/amd/amdht/h3ffeat.h
@@ -2,6 +2,7 @@
  * This file is part of the coreboot project.
  *
  * Copyright (C) 2007-2008 Advanced Micro Devices, Inc.
+ * Copyright (C) 2015 Timothy Pearson <tpearson@raptorengineeringinc.com>, Raptor Engineering
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -62,6 +63,7 @@
 #define HTHOST_LINK_CAPABILITY_REG		0x00
 #define HTHOST_LINK_CONTROL_REG		0x04
 #define HTHOST_FREQ_REV_REG			0x08
+#define HTHOST_FREQ_REV_REG_2			0x1c
 	#define HT_HOST_REV_REV3		0x60
 #define HTHOST_FEATURE_CAP_REG			0x0C
 #define HTHOST_BUFFER_COUNT_REG		0x10
@@ -127,10 +129,10 @@ typedef struct
 
 	/* This section is for keeping track of capabilities and possible configurations */
 	BOOL RegangCap;
-	u16 PrvFrequencyCap;
+	uint32_t PrvFrequencyCap;
 	u8 PrvWidthInCap;
 	u8 PrvWidthOutCap;
-	u16 CompositeFrequencyCap;
+	uint32_t CompositeFrequencyCap;
 
 } sPortDescriptor;
 
diff --git a/src/northbridge/amd/amdht/h3finit.c b/src/northbridge/amd/amdht/h3finit.c
index 82bf885..14f348f 100644
--- a/src/northbridge/amd/amdht/h3finit.c
+++ b/src/northbridge/amd/amdht/h3finit.c
@@ -52,28 +52,32 @@
 #define APIC_Base_BSP	8
 #define APIC_Base	0x1b
 
-#define NVRAM_LIMIT_HT_SPEED_200  0xf
-#define NVRAM_LIMIT_HT_SPEED_300  0xe
-#define NVRAM_LIMIT_HT_SPEED_400  0xd
-#define NVRAM_LIMIT_HT_SPEED_500  0xc
-#define NVRAM_LIMIT_HT_SPEED_600  0xb
-#define NVRAM_LIMIT_HT_SPEED_800  0xa
-#define NVRAM_LIMIT_HT_SPEED_1000 0x9
-#define NVRAM_LIMIT_HT_SPEED_1200 0x8
-#define NVRAM_LIMIT_HT_SPEED_1400 0x7
-#define NVRAM_LIMIT_HT_SPEED_1600 0x6
-#define NVRAM_LIMIT_HT_SPEED_1800 0x5
-#define NVRAM_LIMIT_HT_SPEED_2000 0x4
-#define NVRAM_LIMIT_HT_SPEED_2200 0x3
-#define NVRAM_LIMIT_HT_SPEED_2400 0x2
-#define NVRAM_LIMIT_HT_SPEED_2600 0x1
+#define NVRAM_LIMIT_HT_SPEED_200  0x12
+#define NVRAM_LIMIT_HT_SPEED_300  0x11
+#define NVRAM_LIMIT_HT_SPEED_400  0x10
+#define NVRAM_LIMIT_HT_SPEED_500  0xf
+#define NVRAM_LIMIT_HT_SPEED_600  0xe
+#define NVRAM_LIMIT_HT_SPEED_800  0xd
+#define NVRAM_LIMIT_HT_SPEED_1000 0xc
+#define NVRAM_LIMIT_HT_SPEED_1200 0xb
+#define NVRAM_LIMIT_HT_SPEED_1400 0xa
+#define NVRAM_LIMIT_HT_SPEED_1600 0x9
+#define NVRAM_LIMIT_HT_SPEED_1800 0x8
+#define NVRAM_LIMIT_HT_SPEED_2000 0x7
+#define NVRAM_LIMIT_HT_SPEED_2200 0x6
+#define NVRAM_LIMIT_HT_SPEED_2400 0x5
+#define NVRAM_LIMIT_HT_SPEED_2600 0x4
+#define NVRAM_LIMIT_HT_SPEED_2800 0x3
+#define NVRAM_LIMIT_HT_SPEED_3000 0x2
+#define NVRAM_LIMIT_HT_SPEED_3200 0x1
 #define NVRAM_LIMIT_HT_SPEED_AUTO 0x0
 
-static const uint16_t ht_speed_limit[16] =
-	{0xFFFF, 0x7FFF, 0x3FFF, 0x1FFF,
-	 0x0FFF, 0x07FF, 0x03FF, 0x01FF,
-	 0x00FF, 0x007F, 0x003F, 0x001F,
-	 0x000F, 0x0007, 0x0003, 0x0001};
+static const uint32_t ht_speed_limit[20] =
+	{0xFFFFF, 0xFFFFF, 0x7FFFF, 0x3FFFF,
+	 0x0FFFF, 0x07FFF, 0x03FFF, 0x01FFF,
+	 0x00FFF, 0x007FF, 0x003FF, 0x001FF,
+	 0x000FF, 0x0007F, 0x0003F, 0x0001F,
+	 0x0000F, 0x00007, 0x00003, 0x00001};
 
 static const struct ht_speed_limit_map_t {
 	uint16_t mhz;
@@ -95,9 +99,12 @@ static const struct ht_speed_limit_map_t {
 	{2200, NVRAM_LIMIT_HT_SPEED_2200},
 	{2400, NVRAM_LIMIT_HT_SPEED_2400},
 	{2600, NVRAM_LIMIT_HT_SPEED_2600},
+	{2800, NVRAM_LIMIT_HT_SPEED_2800},
+	{3000, NVRAM_LIMIT_HT_SPEED_3000},
+	{3200, NVRAM_LIMIT_HT_SPEED_3200},
 };
 
-static const uint16_t ht_speed_mhz_to_hw(uint16_t mhz)
+static const uint32_t ht_speed_mhz_to_hw(uint16_t mhz)
 {
 	size_t i;
 	for (i = 0; i < ARRAY_SIZE(ht_speed_limit_map); i++)
@@ -456,7 +463,7 @@ static void htDiscoveryFloodFill(sMainData *pDat)
 		/* Set currentNode's NodeID field to currentNode */
 		pDat->nb->writeNodeID(currentNode, currentNode, pDat->nb);
 
-		/* Enable routing tables on currentNode*/
+		/* Enable routing tables on currentNode */
 		pDat->nb->enableRoutingTables(currentNode, pDat->nb);
 
 		for (currentLinkID = 0; currentLinkID < pDat->nb->maxLinks; currentLinkID++)
@@ -1431,19 +1438,30 @@ static void regangLinks(sMainData *pDat)
 static void selectOptimalWidthAndFrequency(sMainData *pDat)
 {
 	u8 i, j;
-	u32 temp;
-	u16 cbPCBFreqLimit;
-	u16 cbPCBFreqLimit_NVRAM;
+	uint32_t temp;
+	uint32_t cbPCBFreqLimit;
+	uint32_t cbPCBFreqLimit_NVRAM;
 	u8 cbPCBABDownstreamWidth;
 	u8 cbPCBBAUpstreamWidth;
 
-	cbPCBFreqLimit_NVRAM = 0xFFFF;
+	cbPCBFreqLimit_NVRAM = 0xfffff;
 	if (get_option(&temp, "hypertransport_speed_limit") == CB_SUCCESS)
 		cbPCBFreqLimit_NVRAM = ht_speed_limit[temp & 0xf];
 
+	if (!is_fam15h()) {
+		/* FIXME
+		 * By default limit frequency to 2.6 GHz as there are residual
+		 * problems with HT v3.1 implementation on at least some Socket G34
+		 * mainboards / Fam10h CPUs.
+		 * Debug the issues and reenable this...
+		 */
+		if (cbPCBFreqLimit_NVRAM > 0xffff)
+			cbPCBFreqLimit_NVRAM = 0xffff;
+	}
+
 	for (i = 0; i < pDat->TotalLinks*2; i += 2)
 	{
-		cbPCBFreqLimit = 0xFFFF;		// Maximum allowed by autoconfiguration
+		cbPCBFreqLimit = 0xfffff;		// Maximum allowed by autoconfiguration
 		if (pDat->HtBlock->ht_link_configuration)
 			cbPCBFreqLimit = ht_speed_mhz_to_hw(pDat->HtBlock->ht_link_configuration->ht_speed_limit);
 		cbPCBFreqLimit = min(cbPCBFreqLimit, cbPCBFreqLimit_NVRAM);
@@ -1488,17 +1506,18 @@ static void selectOptimalWidthAndFrequency(sMainData *pDat)
 			}
 		}
 
-
 		temp = pDat->PortList[i].PrvFrequencyCap;
 		temp &= pDat->PortList[i+1].PrvFrequencyCap;
 		temp &= cbPCBFreqLimit;
-		pDat->PortList[i].CompositeFrequencyCap = (u16)temp;
-		pDat->PortList[i+1].CompositeFrequencyCap = (u16)temp;
+		pDat->PortList[i].CompositeFrequencyCap = temp;
+		pDat->PortList[i+1].CompositeFrequencyCap = temp;
 
 		ASSERT (temp != 0);
-		for (j = 15; ; j--)
+		for (j = 19; ; j--)
 		{
-			if (temp & ((u32)1 << j))
+			if ((j == 16) || (j == 15))
+				continue;
+			if (temp & ((uint32_t)1 << j))
 				break;
 		}
 
@@ -1642,12 +1661,14 @@ static void hammerSublinkFixup(sMainData *pDat)
 					/*  Remove hiFreq from the list of valid frequencies */
 					temp = temp & ~((uint32)1 << hiFreq);
 					ASSERT (temp != 0);
-					pDat->PortList[hiIndex].CompositeFrequencyCap = (uint16)temp;
-					pDat->PortList[hiIndex+1].CompositeFrequencyCap = (uint16)temp;
+					pDat->PortList[hiIndex].CompositeFrequencyCap = temp;
+					pDat->PortList[hiIndex+1].CompositeFrequencyCap = temp;
 
-					for (k = 15; ; k--)
+					for (k = 19; ; k--)
 					{
-						if (temp & ((u32)1 << k))
+						if ((j == 16) || (j == 15))
+							continue;
+						if (temp & ((uint32_t)1 << k))
 							break;
 					}
 
diff --git a/src/northbridge/amd/amdht/h3finit.h b/src/northbridge/amd/amdht/h3finit.h
index 58065b3..462f3e3 100644
--- a/src/northbridge/amd/amdht/h3finit.h
+++ b/src/northbridge/amd/amdht/h3finit.h
@@ -53,6 +53,9 @@
 #define HT_FREQUENCY_2200M	12
 #define HT_FREQUENCY_2400M	13
 #define HT_FREQUENCY_2600M	14
+#define HT_FREQUENCY_2800M	17
+#define HT_FREQUENCY_3000M	18
+#define HT_FREQUENCY_3200M	19
 
 /* Frequency Limit equates for call backs which take a frequency supported mask. */
 #define HT_FREQUENCY_LIMIT_200M	1
@@ -69,6 +72,9 @@
 #define HT_FREQUENCY_LIMIT_2200M	0x1FFF
 #define HT_FREQUENCY_LIMIT_2400M	0x3FFF
 #define HT_FREQUENCY_LIMIT_2600M	0x7FFF
+#define HT_FREQUENCY_LIMIT_2800M	0x3FFFF
+#define HT_FREQUENCY_LIMIT_3000M	0x7FFFF
+#define HT_FREQUENCY_LIMIT_3200M	0xFFFFF
 
 /*
  * Event Notify definitions
@@ -224,7 +230,7 @@ typedef struct {
 	 *	@param[in]  u8  Link      = The Device's link number (0 or 1)
 	 *	@param[in,out] u8*  LinkWidthIn  = modify to change the Link Witdh In
 	 *	@param[in,out] u8*  LinkWidthOut  = modify to change the Link Witdh Out
-	 *	@param[in,out] u16* FreqCap = modify to change the link's frequency capability
+	 *	@param[in,out] u32* FreqCap = modify to change the link's frequency capability
 	 *
 	 * ---------------------------------------------------------------------------------------
 	 */
@@ -239,7 +245,7 @@ typedef struct {
 		u8 Link,
 		u8 *LinkWidthIn,
 		u8 *LinkWidthOut,
-		u16 *FreqCap
+		u32 *FreqCap
 	);
 
 	/**----------------------------------------------------------------------------------------
@@ -262,7 +268,7 @@ typedef struct {
 	 *	@param[in]  u8  linkB  = The link on that node
 	 *	@param[in,out]  u8*  ABLinkWidthLimit = modify to change the Link Witdh In
 	 *	@param[in,out]  u8*  BALinkWidthLimit = modify to change the Link Witdh Out
-	 *	@param[in,out]  u16* PCBFreqCap  = modify to change the link's frequency capability
+	 *	@param[in,out]  u32* PCBFreqCap  = modify to change the link's frequency capability
 	 *
 	 * ---------------------------------------------------------------------------------------
 	 */
@@ -273,7 +279,7 @@ typedef struct {
 		u8 LinkB,
 		u8 *ABLinkWidthLimit,
 		u8 *BALinkWidthLimit,
-		u16 *PCBFreqCap
+		u32 *PCBFreqCap
 	);
 
 	/**----------------------------------------------------------------------------------------
@@ -295,7 +301,7 @@ typedef struct {
 	 *	@param[in]  u8  Depth  = The depth in the I/O chain from the Host
 	 *	@param[in,out]  u8* DownstreamLinkWidthLimit = modify to change the Link Witdh In
 	 *	@param[in,out]  u8* UpstreamLinkWidthLimit  = modify to change the Link Witdh Out
-	 *	@param[in,out]  u16* PCBFreqCap = modify to change the link's frequency capability
+	 *	@param[in,out]  u32* PCBFreqCap = modify to change the link's frequency capability
 	 *
 	 * ---------------------------------------------------------------------------------------
 	 */
@@ -305,7 +311,7 @@ typedef struct {
 		u8 Depth,
 		u8 *DownstreamLinkWidthLimit,
 		u8 *UpstreamLinkWidthLimit,
-		u16 *PCBFreqCap
+		u32 *PCBFreqCap
 	);
 
 	/**----------------------------------------------------------------------------------------
diff --git a/src/northbridge/amd/amdht/h3ncmn.c b/src/northbridge/amd/amdht/h3ncmn.c
index a27ee5b..e03e5eb 100644
--- a/src/northbridge/amd/amdht/h3ncmn.c
+++ b/src/northbridge/amd/amdht/h3ncmn.c
@@ -1314,7 +1314,7 @@ static u8 convertWidthToBits(u8 value, cNorthBridge *nb)
  *	@return  Frequency mask
  *
  ******************************************************************************/
-static u16 ht1NorthBridgeFreqMask(u8 node, cNorthBridge *nb)
+static uint32_t ht1NorthBridgeFreqMask(u8 node, cNorthBridge *nb)
 {
 	/* only up to HT1 speeds */
 	return (HT_FREQUENCY_LIMIT_HT1_ONLY);
@@ -1335,26 +1335,43 @@ static u16 ht1NorthBridgeFreqMask(u8 node, cNorthBridge *nb)
  *	@return  = Frequency mask
  *
  ******************************************************************************/
-static u16 fam10NorthBridgeFreqMask(u8 node, cNorthBridge *nb)
+static uint32_t fam10NorthBridgeFreqMask(u8 node, cNorthBridge *nb)
 {
 	u8 nbCOF;
-	u16 supported;
+	uint32_t supported;
 
 	nbCOF = getMinNbCOF();
 	/*
 	 * nbCOF is minimum northbridge speed in hundreds of MHz.
 	 * HT can not go faster than the minimum speed of the northbridge.
 	 */
-	if ((nbCOF >= 6) && (nbCOF <= 26))
+	if ((nbCOF >= 6) && (nbCOF < 10))
 	{
+		/* Generation 1 HT link frequency */
 		/* Convert frequency to bit and all less significant bits,
 		 * by setting next power of 2 and subtracting 1.
 		 */
-		supported = ((u16)1 << ((nbCOF >> 1) + 2)) - 1;
+		supported = ((uint32_t)1 << ((nbCOF >> 1) + 2)) - 1;
 	}
-	else if (nbCOF > 26)
+	else if ((nbCOF >= 10) && (nbCOF <= 32))
 	{
-		supported = HT_FREQUENCY_LIMIT_2600M;
+		/* Generation 3 HT link frequency
+		 * Assume error retry is enabled on all Gen 3 links
+		 */
+		if (is_gt_rev_d()) {
+			nbCOF *= 2;
+			if (nbCOF > 32)
+				nbCOF = 32;
+		}
+
+		/* Convert frequency to bit and all less significant bits,
+		 * by setting next power of 2 and subtracting 1.
+		 */
+		supported = ((uint32_t)1 << ((nbCOF >> 1) + 2)) - 1;
+	}
+	else if (nbCOF > 32)
+	{
+		supported = HT_FREQUENCY_LIMIT_3200M;
 	}
 	/* unlikely cases, but include as a defensive measure, also avoid trick above */
 	else if (nbCOF == 4)
@@ -1409,8 +1426,13 @@ static void gatherLinkData(sMainData *pDat, cNorthBridge *nb)
 			pDat->PortList[i].PrvWidthInCap = convertBitsToWidth((u8)temp, pDat->nb);
 
 			AmdPCIReadBits(linkBase + HTHOST_FREQ_REV_REG, 31, 16, &temp);
-			pDat->PortList[i].PrvFrequencyCap = (u16)temp & 0x7FFF
-				& nb->northBridgeFreqMask(pDat->PortList[i].NodeID, pDat->nb); /*  Mask off bit 15, reserved value */
+			pDat->PortList[i].PrvFrequencyCap = temp & 0x7FFF	/*  Mask off bit 15, reserved value */
+				& nb->northBridgeFreqMask(pDat->PortList[i].NodeID, pDat->nb);
+			if (is_gt_rev_d()) {
+				AmdPCIReadBits(linkBase + HTHOST_FREQ_REV_REG_2, 15, 1, &temp);
+				temp &= 0x7;	/* Mask off reserved values */
+				pDat->PortList[i].PrvFrequencyCap |= (temp << 17);
+			}
 		}
 		else
 		{
@@ -1467,7 +1489,7 @@ static void setLinkData(sMainData *pDat, cNorthBridge *nb)
 {
 	u8 i;
 	SBDFO linkBase;
-	u32 temp, widthin, widthout, bits;
+	u32 temp, temp2, frequency_index, widthin, widthout, bits;
 
 	for (i = 0; i < pDat->TotalLinks*2; i++)
 	{
@@ -1528,10 +1550,19 @@ static void setLinkData(sMainData *pDat, cNorthBridge *nb)
 		temp = pDat->PortList[i].SelFrequency;
 		if (pDat->PortList[i].Type == PORTLIST_TYPE_CPU)
 		{
-			ASSERT((temp >= HT_FREQUENCY_600M && temp <= HT_FREQUENCY_2600M)
+			ASSERT((temp >= HT_FREQUENCY_600M && temp <= HT_FREQUENCY_3200M)
 				|| (temp == HT_FREQUENCY_200M) || (temp == HT_FREQUENCY_400M));
+			frequency_index = temp;
+			if (temp > 0xf) {
+				temp2 = (temp >> 4) & 0x1;
+				temp &= 0xf;
+			} else {
+				temp2 = 0x0;
+			}
+			if (is_gt_rev_d())
+				AmdPCIWriteBits(linkBase + HTHOST_FREQ_REV_REG_2, 0, 0, &temp2);
 			AmdPCIWriteBits(linkBase + HTHOST_FREQ_REV_REG, 11, 8, &temp);
-			if (temp > HT_FREQUENCY_1000M) /*  Gen1 = 200MHz -> 1000MHz, Gen3 = 1200MHz -> 2600MHz */
+			if (frequency_index > HT_FREQUENCY_1000M) /*  Gen1 = 200MHz -> 1000MHz, Gen3 = 1200MHz -> 3200MHz */
 			{
 				/* Enable  for Gen3 frequencies */
 				temp = 1;
@@ -1541,27 +1572,27 @@ static void setLinkData(sMainData *pDat, cNorthBridge *nb)
 				/* Disable  for Gen1 frequencies */
 				temp = 0;
 			}
-				/* HT3 retry mode enable / disable */
-				AmdPCIWriteBits(MAKE_SBDFO(makePCISegmentFromNode(pDat->PortList[i].NodeID),
-							makePCIBusFromNode(pDat->PortList[i].NodeID),
-							makePCIDeviceFromNode(pDat->PortList[i].NodeID),
-							CPU_HTNB_FUNC_00,
-							REG_HT_LINK_RETRY0_0X130 + 4*pDat->PortList[i].Link),
-							0, 0, &temp);
-				/* and Scrambling enable / disable */
-				AmdPCIWriteBits(MAKE_SBDFO(makePCISegmentFromNode(pDat->PortList[i].NodeID),
+			/* HT3 retry mode enable / disable */
+			AmdPCIWriteBits(MAKE_SBDFO(makePCISegmentFromNode(pDat->PortList[i].NodeID),
 						makePCIBusFromNode(pDat->PortList[i].NodeID),
 						makePCIDeviceFromNode(pDat->PortList[i].NodeID),
 						CPU_HTNB_FUNC_00,
-						REG_HT_LINK_EXT_CONTROL0_0X170 + 4*pDat->PortList[i].Link),
-						3, 3, &temp);
+						REG_HT_LINK_RETRY0_0X130 + 4*pDat->PortList[i].Link),
+						0, 0, &temp);
+			/* and Scrambling enable / disable */
+			AmdPCIWriteBits(MAKE_SBDFO(makePCISegmentFromNode(pDat->PortList[i].NodeID),
+					makePCIBusFromNode(pDat->PortList[i].NodeID),
+					makePCIDeviceFromNode(pDat->PortList[i].NodeID),
+					CPU_HTNB_FUNC_00,
+					REG_HT_LINK_EXT_CONTROL0_0X170 + 4*pDat->PortList[i].Link),
+					3, 3, &temp);
 		}
 		else
 		{
 			SBDFO currentPtr;
 			BOOL isFound;
 
-			ASSERT(temp <= HT_FREQUENCY_2600M);
+			ASSERT(temp <= HT_FREQUENCY_3200M);
 			/* Write the frequency setting */
 			AmdPCIWriteBits(linkBase + HTSLAVE_FREQ_REV_0_REG, 11, 8, &temp);
 
@@ -1722,6 +1753,9 @@ static void fam0fWriteHTLinkCmdBufferAlloc(u8 node, u8 link, u8 req, u8 preq, u8
 	/* Probe Command Buffers */
 	temp = prb;
 	AmdPCIWriteBits(currentPtr, 15, 12, &temp);
+	/* LockBc */
+	temp = 1;
+	AmdPCIWriteBits(currentPtr, 31, 31, &temp);
 }
 #endif /* HT_BUILD_NC_ONLY */
 
diff --git a/src/northbridge/amd/amdht/h3ncmn.h b/src/northbridge/amd/amdht/h3ncmn.h
index 7f8f4d1..5795e9a 100644
--- a/src/northbridge/amd/amdht/h3ncmn.h
+++ b/src/northbridge/amd/amdht/h3ncmn.h
@@ -2,6 +2,7 @@
  * This file is part of the coreboot project.
  *
  * Copyright (C) 2007 Advanced Micro Devices, Inc.
+ * Copyright (C) 2015 Timothy Pearson <tpearson@raptorengineeringinc.com>, Raptor Engineering
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -107,7 +108,7 @@ struct cNorthBridge
 	/* Public Interfaces for northbridge clients, Optimization */
 	u8 (*convertBitsToWidth)(u8 value, cNorthBridge *nb);
 	u8 (*convertWidthToBits)(u8 value, cNorthBridge *nb);
-	u16 (*northBridgeFreqMask)(u8 node, cNorthBridge *nb);
+	uint32_t (*northBridgeFreqMask)(u8 node, cNorthBridge *nb);
 	void (*gatherLinkData)(sMainData *pDat, cNorthBridge *nb);
 	void (*setLinkData)(sMainData *pDat, cNorthBridge *nb);
 
-- 
1.7.9.5