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From 21df09828beb3385b1fe1eaa763578780e444b77 Mon Sep 17 00:00:00 2001
From: Timothy Pearson <tpearson@raptorengineeringinc.com>
Date: Mon, 7 Sep 2015 18:07:43 -0500
Subject: [PATCH 137/139] northbridge/amd/amdht: Fix XCS buffer count setup on
AMD Family 15h CPUs
Change-Id: Ie4bc8b3ea6b110bc507beda025de53d828118f55
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
---
src/northbridge/amd/amdht/h3ncmn.c | 94 +++++++++++++++++++++++++++++++++++++-
1 file changed, 92 insertions(+), 2 deletions(-)
diff --git a/src/northbridge/amd/amdht/h3ncmn.c b/src/northbridge/amd/amdht/h3ncmn.c
index 841fc0c..80fe7ce 100644
--- a/src/northbridge/amd/amdht/h3ncmn.c
+++ b/src/northbridge/amd/amdht/h3ncmn.c
@@ -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
@@ -1393,6 +1394,75 @@ static uint32_t fam10NorthBridgeFreqMask(u8 node, cNorthBridge *nb)
/***************************************************************************//**
*
+ * static u16
+ * fam15NorthBridgeFreqMask(u8 NodeID, cNorthBridge *nb)
+ *
+ * Description:
+ * Return a mask that eliminates HT frequencies that cannot be used due to a slow
+ * northbridge frequency.
+ *
+ * Parameters:
+ * @param[in] node = Result could (later) be for a specific node
+ * @param[in] *nb = this northbridge
+ * @return = Frequency mask
+ *
+ ******************************************************************************/
+static uint32_t fam15NorthBridgeFreqMask(u8 node, cNorthBridge *nb)
+{
+ u8 nbCOF;
+ 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 < 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 = ((uint32_t)1 << ((nbCOF >> 1) + 2)) - 1;
+ }
+ else if ((nbCOF >= 10) && (nbCOF <= 32))
+ {
+ /* Generation 3 HT link frequency
+ * Assume error retry is enabled on all Gen 3 links
+ */
+ 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)
+ {
+ supported = HT_FREQUENCY_LIMIT_400M;
+ }
+ else if (nbCOF == 2)
+ {
+ supported = HT_FREQUENCY_LIMIT_200M;
+ }
+ else
+ {
+ STOP_HERE;
+ supported = HT_FREQUENCY_LIMIT_200M;
+ }
+
+ return (fixEarlySampleFreqCapability(supported));
+}
+
+/***************************************************************************//**
+ *
* static void
* gatherLinkData(sMainData *pDat, cNorthBridge *nb)
*
@@ -2266,6 +2336,26 @@ static void fam10BufferOptimizations(u8 node, sMainData *pDat, cNorthBridge *nb)
}
}
+/***************************************************************************//**
+ *
+ * static void
+ * fam15BufferOptimizations(u8 node, sMainData *pDat, cNorthBridge *nb)
+ *
+ * Description:
+ * Buffer tunings are inherently northbridge specific. Check for specific configs
+ * which require adjustments and apply any standard workarounds to this node.
+ *
+ * Parameters:
+ * @param[in] node = the node to tune
+ * @param[in] *pDat = global state
+ * @param[in] nb = this northbridge
+ *
+ ******************************************************************************/
+static void fam15BufferOptimizations(u8 node, sMainData *pDat, cNorthBridge *nb)
+{
+ /* Buffer count setup on Family 15h is currently handled in cpuSetAMDPCI */
+}
+
/*
* North Bridge 'constructor'.
*
@@ -2324,11 +2414,11 @@ void newNorthBridge(u8 node, cNorthBridge *nb)
ht3SetCFGAddrMap,
convertBitsToWidth,
convertWidthToBits,
- fam10NorthBridgeFreqMask,
+ fam15NorthBridgeFreqMask,
gatherLinkData,
setLinkData,
ht3WriteTrafficDistribution,
- fam10BufferOptimizations,
+ fam15BufferOptimizations,
0x00000001,
0x00000200,
18,
--
1.9.1
|
