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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2010 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
*/
/* This file contains functions for common utility functions */
/*
*-----------------------------------------------------------------------------
* MODULES USED
*
*-----------------------------------------------------------------------------
*/
/*
*-----------------------------------------------------------------------------
* EXPORTED FUNCTIONS
*
*-----------------------------------------------------------------------------
*/
static void AmdMemPCIReadBits(SBDFO loc, u8 highbit, u8 lowbit, u32 *pValue)
{
/* ASSERT(highbit < 32 && lowbit < 32 && highbit >= lowbit && (loc & 3) == 0); */
AmdMemPCIRead(loc, pValue);
*pValue = *pValue >> lowbit; /* Shift */
/* A 1<<32 == 1<<0 due to x86 SHL instruction, so skip if that is the case */
if ((highbit-lowbit) != 31)
*pValue &= (((u32)1 << (highbit-lowbit+1))-1);
}
static void AmdMemPCIWriteBits(SBDFO loc, u8 highbit, u8 lowbit, u32 *pValue)
{
u32 temp, mask;
/* ASSERT(highbit < 32 && lowbit < 32 && highbit >= lowbit && (loc & 3) == 0); */
/* A 1<<32 == 1<<0 due to x86 SHL instruction, so skip if that is the case */
if ((highbit-lowbit) != 31)
mask = (((u32)1 << (highbit-lowbit+1))-1);
else
mask = (u32)0xFFFFFFFF;
AmdMemPCIRead(loc, &temp);
temp &= ~(mask << lowbit);
temp |= (*pValue & mask) << lowbit;
AmdMemPCIWrite(loc, &temp);
}
/*-----------------------------------------------------------------------------
* u32 bitTestSet(u32 csMask,u32 tempD)
*
* Description:
* This routine sets a bit in a u32
*
* Parameters:
* IN csMask = Target value in which the bit will be set
* IN tempD = Bit that will be set
* OUT value = Target value with the bit set
*-----------------------------------------------------------------------------
*/
static u32 bitTestSet(u32 csMask,u32 tempD)
{
u32 localTemp;
/* ASSERT(tempD < 32); */
localTemp = 1;
csMask |= localTemp << tempD;
return csMask;
}
/*-----------------------------------------------------------------------------
* u32 bitTestReset(u32 csMask,u32 tempD)
*
* Description:
* This routine re-sets a bit in a u32
*
* Parameters:
* IN csMask = Target value in which the bit will be re-set
* IN tempD = Bit that will be re-set
* OUT value = Target value with the bit re-set
*-----------------------------------------------------------------------------
*/
static u32 bitTestReset(u32 csMask,u32 tempD)
{
u32 temp, localTemp;
/* ASSERT(tempD < 32); */
localTemp = 1;
temp = localTemp << tempD;
temp = ~temp;
csMask &= temp;
return csMask;
}
/*-----------------------------------------------------------------------------
* u32 get_Bits(DCTStruct *DCTData, u8 DCT, u8 Node, u8 func, u16 offset,
* u8 low, u8 high)
*
* Description:
* This routine Gets the PCT bits from the specified Node, DCT and PCI address
*
* Parameters:
* IN OUT *DCTData - Pointer to buffer with information about each DCT
* IN DCT - DCT number
* - 1 indicates DCT 1
* - 0 indicates DCT 0
* - 2 both DCTs
* Node - Node number
* Func - PCI Function number
* Offset - PCI register number
* Low - Low bit of the bit field
* High - High bit of the bit field
*
* OUT value = Value read from PCI space
*-----------------------------------------------------------------------------
*/
static u32 get_Bits(sDCTStruct *pDCTData,
u8 dct, u8 node, u8 func,
u16 offset, u8 low, u8 high)
{
u32 temp;
/* ASSERT(node < MAX_NODES); */
if (dct == BOTH_DCTS)
{
/* Registers exist on DCT0 only */
AmdMemPCIReadBits(MAKE_SBDFO(0,0,24+node,func,offset), high, low, &temp);
}
else
{
if (dct == 1)
{
/* Write to dct 1 */
offset += 0x100;
AmdMemPCIReadBits(MAKE_SBDFO(0,0,24+node,func,offset), high, low, &temp);
}
else
{
/* Write to dct 0 */
AmdMemPCIReadBits(MAKE_SBDFO(0,0,24+node,func,offset), high, low, &temp);
}
}
return temp;
}
/*-----------------------------------------------------------------------------
* void set_Bits(DCTStruct *DCTData,u8 DCT,u8 Node,u8 func, u16 offset,
* u8 low, u8 high, u32 value)
*
* Description:
* This routine Sets the PCT bits from the specified Node, DCT and PCI address
*
* Parameters:
* IN OUT *DCTData - Pointer to buffer with information about each DCT
* IN DCT - DCT number
* - 1 indicates DCT 1
* - 0 indicates DCT 0
* - 2 both DCTs
* Node - Node number
* Func - PCI Function number
* Offset - PCI register number
* Low - Low bit of the bit field
* High - High bit of the bit field
*
* OUT
*-----------------------------------------------------------------------------
*/
static void set_Bits(sDCTStruct *pDCTData,
u8 dct, u8 node, u8 func,
u16 offset, u8 low, u8 high, u32 value)
{
u32 temp;
temp = value;
if (dct == BOTH_DCTS)
{
/* Registers exist on DCT0 only */
AmdMemPCIWriteBits(MAKE_SBDFO(0,0,24+node,func,offset), high, low, &temp);
}
else
{
if (dct == 1)
{
/* Write to dct 1 */
offset += 0x100;
AmdMemPCIWriteBits(MAKE_SBDFO(0,0,24+node,func,offset), high, low, &temp);
}
else
{
/* Write to dct 0 */
AmdMemPCIWriteBits(MAKE_SBDFO(0,0,24+node,func,offset), high, low, &temp);
}
}
}
/*-------------------------------------------------
* u32 get_ADD_DCT_Bits(DCTStruct *DCTData,u8 DCT,u8 Node,u8 func,
* u16 offset,u8 low, u8 high)
*
* Description:
* This routine gets the Additional PCT register from Function 2 by specified
* Node, DCT and PCI address
*
* Parameters:
* IN OUT *DCTData - Pointer to buffer with information about each DCT
* IN DCT - DCT number
* - 1 indicates DCT 1
* - 0 indicates DCT 0
* - 2 both DCTs
* Node - Node number
* Func - PCI Function number
* Offset - Additional PCI register number
* Low - Low bit of the bit field
* High - High bit of the bit field
*
* OUT
*-------------------------------------------------
*/
static u32 get_ADD_DCT_Bits(sDCTStruct *pDCTData,
u8 dct, u8 node, u8 func,
u16 offset, u8 low, u8 high)
{
u32 tempD;
tempD = offset;
tempD = bitTestReset(tempD,DctAccessWrite);
set_Bits(pDCTData, dct, node, FUN_DCT, DRAM_CONTROLLER_ADD_DATA_OFFSET_REG,
PCI_MIN_LOW, PCI_MAX_HIGH, offset);
while ((get_Bits(pDCTData,dct, node, FUN_DCT, DRAM_CONTROLLER_ADD_DATA_OFFSET_REG,
DctAccessDone, DctAccessDone)) == 0);
return (get_Bits(pDCTData, dct, node, FUN_DCT, DRAM_CONTROLLER_ADD_DATA_PORT_REG,
low, high));
}
/*-------------------------------------------------
* void set_DCT_ADDR_Bits(DCTStruct *DCTData, u8 DCT,u8 Node,u8 func,
* u16 offset,u8 low, u8 high, u32 value)
*
* Description:
* This routine sets the Additional PCT register from Function 2 by specified
* Node, DCT and PCI address
*
* Parameters:
* IN OUT *DCTData - Pointer to buffer with information about each DCT
* IN DCT - DCT number
* - 1 indicates DCT 1
* - 0 indicates DCT 0
* - 2 both DCTs
* Node - Node number
* Func - PCI Function number
* Offset - Additional PCI register number
* Low - Low bit of the bit field
* High - High bit of the bit field
*
* OUT
*-------------------------------------------------
*/
static void set_DCT_ADDR_Bits(sDCTStruct *pDCTData,
u8 dct, u8 node, u8 func,
u16 offset, u8 low, u8 high, u32 value)
{
u32 tempD;
set_Bits(pDCTData, dct, node, FUN_DCT, DRAM_CONTROLLER_ADD_DATA_OFFSET_REG,
PCI_MIN_LOW, PCI_MAX_HIGH, offset);
while ((get_Bits(pDCTData,dct, node, FUN_DCT, DRAM_CONTROLLER_ADD_DATA_OFFSET_REG,
DctAccessDone, DctAccessDone)) == 0);
set_Bits(pDCTData, dct, node, FUN_DCT, DRAM_CONTROLLER_ADD_DATA_PORT_REG,
low, high, value);
tempD = offset;
tempD = bitTestSet(tempD,DctAccessWrite);
set_Bits(pDCTData, dct, node, FUN_DCT,DRAM_CONTROLLER_ADD_DATA_OFFSET_REG,
PCI_MIN_LOW, PCI_MAX_HIGH, tempD);
while ((get_Bits(pDCTData,dct, pDCTData->NodeId, FUN_DCT,
DRAM_CONTROLLER_ADD_DATA_OFFSET_REG, DctAccessDone,
DctAccessDone)) == 0);
}
/*-------------------------------------------------
* BOOL bitTest(u32 value, u8 bitLoc)
*
* Description:
* This routine tests the value to determine if the bitLoc is set
*
* Parameters:
* IN Value - value to be tested
* bitLoc - bit location to be tested
* OUT TRUE - bit is set
* FALSE - bit is clear
*-------------------------------------------------
*/
static BOOL bitTest(u32 value, u8 bitLoc)
{
u32 tempD, compD;
tempD = value;
compD = 0;
compD = bitTestSet(compD,bitLoc);
tempD &= compD;
if (compD == tempD)
{
return TRUE;
}
else
{
return FALSE;
}
}
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