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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007 Advanced Micro Devices, Inc.
*
* 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
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.
*/
#undef FILECODE
#define FILECODE 0xCCCC
#include "comlib.h"
#include "AsPsDefs.h"
#include "AsPsNb.h"
u8 getNumOfNodeNb(void);
u8 translateNodeIdToDeviceIdNb(u8 nodeId);
/**
* Return the minimum possible NbCOF (in 100MHz) for the system.
*
* This function can be run on any core and is used by the HT & Memory init
* code in Phase 1.
*
* @return minNbCOF (in multiple of half of CLKIN, 100MHz).
*/
u8 getMinNbCOF(void)
{
u8 numOfNode, i, j, deviceId, nbDid, nbFid, nextNbFid;
u32 dtemp;
nbDid = 0;
nbFid = 0;
/* get number of node in the system */
numOfNode = getNumOfNodeNb();
/* go through each node for the minimum NbCOF (in multiple of CLKIN/2) */
for(i=0; i < numOfNode; i++)
{
/* stub function for APIC ID virtualization for large MP system later */
deviceId = translateNodeIdToDeviceIdNb(i);
/* read all P-state spec registers for NbDid=1 */
for(j=0; j < 5; j++)
{
AmdPCIRead(MAKE_SBDFO(0,0,deviceId,FN_4,PS_SPEC_REG+(j*PCI_REG_LEN)), &dtemp); /*F4x1E0 + j*4 */
/* get NbDid */
if(dtemp & NB_DID_MASK)
nbDid = 1;
}
/* if F3x1FC[NbCofVidUpdate]=0, NbFid = default value */
AmdPCIRead(MAKE_SBDFO(0,0,deviceId,FN_3,PRCT_INFO), &dtemp); /*F3x1FC*/
if(!(dtemp & NB_CV_UPDATE)) /* F3x1FC[NbCofVidUpdated]=0, use default VID */
{
AmdPCIRead(MAKE_SBDFO(0,0,deviceId,FN_3,CPTC0), &dtemp); /*F3xD4*/
nextNbFid = (u8) (dtemp & BIT_MASK_5);
if(nbDid)
nextNbFid = (u8) (nextNbFid >> 1);
}
else
{
/* check PVI/SPI */
AmdPCIRead(MAKE_SBDFO(0,0,deviceId,FN_3,PW_CTL_MISC), &dtemp); /*F3xA0*/
if(dtemp & PVI_MODE) /* PVI */
{
AmdPCIRead(MAKE_SBDFO(0,0,deviceId,FN_3,PRCT_INFO), &dtemp); /*F3x1FC*/
nextNbFid = (u8) (dtemp >> UNI_NB_FID_BIT);
nextNbFid &= BIT_MASK_5;
/* if(nbDid)
nextNbFid = nextNbFid >> 1; */
}
else /* SVI */
{
AmdPCIRead(MAKE_SBDFO(0,0,deviceId,FN_3,PRCT_INFO), &dtemp); /*F3x1FC*/
nextNbFid = (u8) ((dtemp >> UNI_NB_FID_BIT) & BIT_MASK_5);
nextNbFid = (u8) (nextNbFid + ((dtemp >> SPLT_NB_FID_OFFSET) & BIT_MASK_3));
/* if(nbDid)
nextNbFid = nextNbFid >> 1; */
}
}
if( i == 0)
nbFid = nextNbFid;
else if( nbFid > nextNbFid )
nbFid = nextNbFid;
}
/* add the base and convert to 100MHz divide by 2 if DID=1 */
if(nbDid)
nbFid = (u8) (nbFid + 4);
else
nbFid = (u8) ((nbFid + 4) << 1);
return nbFid;
}
u8 getNumOfNodeNb(void)
{
u32 dtemp;
AmdPCIRead(MAKE_SBDFO(0,0,24,0,0x60), &dtemp);
dtemp = (dtemp >> 4) & BIT_MASK_3;
dtemp++;
return (u8)dtemp;
}
/**
* Return the PCI device ID for PCI access using node ID.
*
* This function may need to change node ID to device ID in big MP systems.
*
* @param nodeId Node ID of the node.
* @return PCI device ID of the node.
*/
u8 translateNodeIdToDeviceIdNb(u8 nodeId)
{
return (u8) (nodeId+PCI_DEV_BASE);
}
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