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164 lines
3.9 KiB
164 lines
3.9 KiB
/*
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*
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* Copyright (c) Microsoft Corporation. All rights reserved.
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*
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* Comap3.C - Compaq MISC 3 PCI chipset routines.
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*
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* Notes:
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* Algorithms from Compaq MISC 3 Data Sheet
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*
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*/
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#include "local.h"
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(INIT, Compaq3ValidateTable)
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#endif //ALLOC_PRAGMA
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/****************************************************************************
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*
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* Compaq3SetIRQ - Set a MISC 3 PCI link to a specific IRQ
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*
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* Exported.
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*
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* ENTRY: bIRQNumber is the new IRQ to be used.
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*
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* bLink is the Link to be set.
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*
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* EXIT: Standard PCIMP return value.
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*
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***************************************************************************/
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PCIMPRET CDECL
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Compaq3SetIRQ(UCHAR bIRQNumber, UCHAR bLink)
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{
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UCHAR bBus, bDevFunc;
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//
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// Validate link number.
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//
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if (bLink >= 10 && bLink <= 12) {
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bLink -= 10;
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bBus = (UCHAR)bBusPIC;
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bDevFunc = (UCHAR)bDevFuncPIC;
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}
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else if (bLink >= 20 && bLink <= 25) {
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bLink -= 20;
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bBus = 0;
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bDevFunc = 0x78;
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}
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else {
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return(PCIMP_INVALID_LINK);
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}
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//
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// Write to the Interrupt Index Register (offset AE)
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//
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WriteConfigUchar(bBus, bDevFunc, (UCHAR)0xAE, bLink);
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//
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// Are we enabling/disabling IRQ?
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//
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if (bIRQNumber==0)
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bIRQNumber|=1; // Disable IRQ.
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else
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bIRQNumber<<=4; // Enable the specified IRQ.
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//
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// Write to the interrupt map register.
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//
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WriteConfigUchar(bBus, bDevFunc, (UCHAR)0xAF, bIRQNumber);
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return(PCIMP_SUCCESS);
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}
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/****************************************************************************
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*
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* Compaq3GetIRQ - Get the IRQ of a MISC 3 PCI link
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*
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* Exported.
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*
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* ENTRY: pbIRQNumber is the buffer to fill.
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*
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* bLink is the Link to be read.
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*
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* EXIT: Standard PCIMP return value.
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*
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***************************************************************************/
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PCIMPRET CDECL
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Compaq3GetIRQ(PUCHAR pbIRQNumber, UCHAR bLink)
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{
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UCHAR bBus, bDevFunc;
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//
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// Validate link number.
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//
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if (bLink >= 10 && bLink <= 12) {
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bLink-=10;
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bBus = (UCHAR)bBusPIC;
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bDevFunc = (UCHAR)bDevFuncPIC;
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}
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else if (bLink >= 20 && bLink <= 25) {
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bLink -= 20;
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bBus = 0;
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bDevFunc = 0x78;
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}
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else {
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return(PCIMP_INVALID_LINK);
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}
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//
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// Write to the Interrupt Index Register.
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//
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WriteConfigUchar(bBus, bDevFunc, (UCHAR)0xAE, bLink);
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//
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// Read the old MISC 3 IRQ register.
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//
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*pbIRQNumber=(ReadConfigUchar(bBus, bDevFunc, (UCHAR)0xAF)>>4);
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return(PCIMP_SUCCESS);
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}
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/****************************************************************************
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*
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* Compaq3ValidateTable - Validate an IRQ table
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*
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* Exported.
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*
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* ENTRY: piihIRQInfoHeader points to an IRQInfoHeader followed
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* by an IRQ Routing Table.
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*
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* ulFlags are PCIMP_VALIDATE flags.
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*
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* EXIT: Standard PCIMP return value.
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*
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***************************************************************************/
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PCIMPRET CDECL
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Compaq3ValidateTable(PIRQINFOHEADER piihIRQInfoHeader, ULONG ulFlags)
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{
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PIRQINFO pii=(PIRQINFO)(((PUCHAR) piihIRQInfoHeader)+sizeof(IRQINFOHEADER));
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ULONG i, j;
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ULONG cEntries=(piihIRQInfoHeader->TableSize-sizeof(IRQINFOHEADER))/sizeof(IRQINFO);
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PAGED_CODE();
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for (i=0; i<cEntries; i++) {
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for (j=0; j<4; j++) {
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if ( pii->PinInfo[j].Link == 0 ||
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(pii->PinInfo[j].Link >= 8 && pii->PinInfo[j].Link <= 12) ||
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(pii->PinInfo[j].Link >= 20 && pii->PinInfo[j].Link <= 25))
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continue;
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return PCIMP_FAILURE;
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}
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pii++;
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}
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return(i? PCIMP_SUCCESS : PCIMP_FAILURE);
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}
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