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/*
* Copyright (c) 2006-2008 Advanced Micro Devices,Inc. ("AMD").
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of the
* License, or (at your option) any later version.
*
* This code 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
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA
*/
//******************************************************************************
//* Routines for setting I/O traps
//******************************************************************************
#include "VSA2.H"
#include "PROTOS.H"
#include "GX2.H"
#include "VPCI.H"
#include "DESCR.H"
#include "CHIPSET.H"
ULONG pascal Compute_IOD_SC(ULONG *, USHORT *, UCHAR);
// External variables:
extern DESCRIPTOR MSRs[];
extern UCHAR NumMbius;
extern MBIU_INFO MbiuInfo[MAX_MBIU];
extern Hardware HardwareInfo;
extern UCHAR * VsmNames[];
extern ULONG Current_VSM;
// Local variables:
UCHAR MbiuSearchOrder[MAX_MBIU] = {2,1,0};
ULONG MbiuSkipFlags[] = {NOT_GLIU0, NOT_GLIU1, NOT_GLIU2};
//***********************************************************************
// Creates an I/O descriptor for the specified Address/Range.
// UsePID:
// 0 = set PID to zero (generate SMI)
// 1 = set PID to MBIU's subtractive port
//***********************************************************************
UCHAR pascal Setup_IO_Descriptor(ULONG * AddressPtr, USHORT * RangePtr, UCHAR UsePID)
{ UCHAR i, j, Index, FirstChoice, SecondChoice;
USHORT Range, MaxRange;
ULONG Address, Flags;
MBIU_INFO * MbiuPtr;
register DESCRIPTOR * Descr;
Range = * RangePtr;
Flags = Address = * AddressPtr;
// Determine type(s) of I/O descriptor to use
FirstChoice = IOD_BM;
SecondChoice = IOD_SC;
if (Flags & (READS_ONLY | WRITES_ONLY)) {
FirstChoice = IOD_SC;
} else {
// Check if we should try to use a swiss-cheese descriptor
if (Address & 7 || Range < 8) {
FirstChoice = IOD_SC;
SecondChoice = IOD_BM;
}
}
// Find an appropriate descriptor
for (i = 0; i < NumMbius; i++) {
j = MbiuSearchOrder[i];
// Skip this MBIU ?
if (Flags & MbiuSkipFlags[j]) {
continue;
}
MbiuPtr = &MbiuInfo[j];
Index = Allocate_Descriptor(FirstChoice, SecondChoice, MbiuPtr->Mbiu);
if (Index != DESCRIPTOR_NOT_FOUND) {
break;
}
}
if (Index == DESCRIPTOR_NOT_FOUND) {
return Index;
}
Descr = &MSRs[Index];
Descr->Address = (USHORT)Address;
// Set appropriate port
if (UsePID) {
Descr->MsrData[1] = MbiuPtr->SubtrPid;
}
switch (Descr->Type) {
case IOD_BM:
// Mask must not include any valid address bits
MaxRange = 1 << BitScanForward(Address);
if (Range > MaxRange) {
Range = MaxRange;
} else {
while (!IsPowerOfTwo(Range)) {
Range--;
}
}
(USHORT)Descr->MsrData[1] = (USHORT)Address >> 12;
Descr->MsrData[0] = ~(Range-1) | 0x000F0000;
Descr->MsrData[0] |= Address << 20;
Descr->Range = Range;
* AddressPtr += Range;
* RangePtr -= Range;
break;
case IOD_SC:
Descr->MsrData[0] = Compute_IOD_SC(AddressPtr, RangePtr, 1);
Descr->Range = Range - * RangePtr;
break;
default:
return DESCRIPTOR_NOT_FOUND;
}
Write_MSR(Descr->MsrAddr, Descr->MsrData);
return Index;
}
//***********************************************************************
// Clears an I/O trap on the specified I/O Range
//***********************************************************************
void pascal Clr_MBus_IO_Trap(ULONG Address, USHORT Range)
{ UCHAR Index;
while (Range) {
// Find an existing descriptor that matches Address
Index = Find_Matching_IO_Descriptor(&Address, &Range, 0);
if (Index == DESCRIPTOR_NOT_FOUND) {
// Report error
Log_Error("Unregistration of I/O 0x%04X by the %s VSM", Address, VsmNames[Get_VSM_Type(Current_VSM)]);
return;
}
}
}
//***********************************************************************
// Sets an I/O trap on the specified I/O Range
//***********************************************************************
void pascal Set_MBus_IO_Trap(ULONG Address, USHORT Range)
{ UCHAR Index;
// If the range is > 8 bytes and/or is not a power of 2,
// multiple descriptors may be required.
while (Range) {
// Find an existing descriptor that matches Address
Index = Find_Matching_IO_Descriptor(&Address, &Range, 2);
if (Index == DESCRIPTOR_NOT_FOUND) {
// An existing descriptor does not match the range.
// Allocate a new descriptor
Index = Setup_IO_Descriptor(&Address, &Range, 0);
if (Index == DESCRIPTOR_NOT_FOUND) {
// Report resource error
Log_Error("No descriptors for I/O trap of 0x%04X by the %s VSM", Address, VsmNames[Get_VSM_Type(Current_VSM)]);
break;
}
} else {
// An existing descriptor was modified for the new Addr/Range
}
MSRs[Index].Flag |= IO_TRAP;
}
}
//***********************************************************************
// Enable/Disable I/O trap
//***********************************************************************
void pascal MBus_IO_Trap(ULONG Param1, ULONG Param2, UCHAR EnableFlag)
{ ULONG Address;
USHORT Range;
// Repackage parameters
Address = Param2;
(USHORT)Address = (USHORT)Param1;
Range = (USHORT)Param2;
// Check for illegal combination of flags
if ((Address & ALL_GLIUS) == ALL_GLIUS) {
// Report error
Log_Error("Illegal combination of flags for I/O 0x%04X by the %s VSM", Address, VsmNames[Get_VSM_Type(Current_VSM)]);
return;
}
if (EnableFlag) {
Set_MBus_IO_Trap(Address, Range);
} else {
Clr_MBus_IO_Trap(Address, Range);
}
}
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