diff options
| -rw-r--r-- | src/northbridge/amd/amdht/h3ncmn.c | 94 |
1 files changed, 92 insertions, 2 deletions
diff --git a/src/northbridge/amd/amdht/h3ncmn.c b/src/northbridge/amd/amdht/h3ncmn.c index 7937c6ea1a..cbe90e03e2 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 @@ -1389,6 +1390,75 @@ 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, |