diff options
Diffstat (limited to 'src/northbridge/amd/amdht/AsPsNb.c')
| -rw-r--r-- | src/northbridge/amd/amdht/AsPsNb.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/src/northbridge/amd/amdht/AsPsNb.c b/src/northbridge/amd/amdht/AsPsNb.c new file mode 100644 index 0000000000..8f79cd107f --- /dev/null +++ b/src/northbridge/amd/amdht/AsPsNb.c @@ -0,0 +1,145 @@ +/* + * This file is part of the LinuxBIOS 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + + +/* + *---------------------------------------------------------------------------- + * MODULES USED + * + *---------------------------------------------------------------------------- + */ +#undef FILECODE +#define FILECODE 0xCCCC +#include "comlib.h" +#include "AsPsDefs.h" +#include "AsPsNb.h" + + +/*---------------------------------------------------------------------------- + * PROTOTYPES OF LOCAL FUNCTIONS + * + *---------------------------------------------------------------------------- + */ +u8 getNumOfNodeNb(void); +u8 translateNodeIdToDeviceIdNb(u8 nodeId); + + +/*---------------------------------------------------------------------------- + * FUNCTION: getMinNbCOF + * INPUT: None + * OUTPUT: minNbCOF (in multiple of half of CLKIN, 100MHz) + * DESCRIPTION: + * This function returns 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. + * ---------------------------------------------------------------------------- + */ +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; +} + +/*---------------------------------------------------------------------------- + * FUNCTION: translateNodeIdToDeviceId + * INPUT: u8 nodeId - node ID of the node + * OUTPUT: u8 - PCI device ID of the node + * DESCRIPTION: + * This function return the PCI device ID for PCI access using node ID. + * This function may need to chnage node ID to device ID in big MP systems. + * ---------------------------------------------------------------------------- + */ +u8 translateNodeIdToDeviceIdNb(u8 nodeId) +{ + return (u8) (nodeId+PCI_DEV_BASE); +} |