205 lines
4.6 KiB
C
205 lines
4.6 KiB
C
/*++
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Copyright (C) 1989-1995 Microsoft Corporation
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Module Name:
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pxsysbus.c
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Abstract:
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Author:
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Environment:
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Revision History:
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Jim Wooldridge - IBM
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- ported to PowerPC
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9/26/95 Steve Johns - Motorola
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- use BusInterruptLevel instead of BusInterruptVector
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--*/
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#include "halp.h"
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#include "eisa.h"
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#include "pxmemctl.h"
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#include "pxsiosup.h"
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#include "pxsystyp.h"
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KIRQL HalpTranslateVectorToIrql(IN ULONG Vector);
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BOOLEAN
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HalpTranslateSystemBusAddress(
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IN PBUS_HANDLER BusHandler,
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IN PBUS_HANDLER RootHandler,
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IN PHYSICAL_ADDRESS BusAddress,
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IN OUT PULONG AddressSpace,
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OUT PPHYSICAL_ADDRESS TranslatedAddress
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);
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ULONG
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HalpGetSystemInterruptVector(
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IN PBUS_HANDLER BusHandler,
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IN PBUS_HANDLER RootHandler,
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IN ULONG BusInterruptLevel,
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IN ULONG BusInterruptVector,
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OUT PKIRQL Irql,
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OUT PKAFFINITY Affinity
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);
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE,HalpGetSystemInterruptVector)
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#endif
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BOOLEAN
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HalpTranslateSystemBusAddress(
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IN PBUS_HANDLER BusHandler,
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IN PBUS_HANDLER RootHandler,
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IN PHYSICAL_ADDRESS BusAddress,
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IN OUT PULONG AddressSpace,
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OUT PPHYSICAL_ADDRESS TranslatedAddress
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)
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/*++
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Routine Description:
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This function translates a bus-relative address space and address into
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a system physical address.
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Arguments:
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BusAddress - Supplies the bus-relative address
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AddressSpace - Supplies the address space number.
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Returns the host address space number.
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AddressSpace == 0 => memory space
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AddressSpace == 1 => I/O space
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TranslatedAddress - Supplies a pointer to return the translated address
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Return Value:
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A return value of TRUE indicates that a system physical address
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corresponding to the supplied bus relative address and bus address
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number has been returned in TranslatedAddress.
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A return value of FALSE occurs if the translation for the address was
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not possible
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--*/
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{
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PSUPPORTED_RANGE pRange;
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pRange = NULL;
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switch (*AddressSpace) {
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case 0:
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// verify memory address is within buses memory limits
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for (pRange = &BusHandler->BusAddresses->PrefetchMemory; pRange; pRange = pRange->Next) {
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if (BusAddress.QuadPart >= pRange->Base &&
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BusAddress.QuadPart <= pRange->Limit) {
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break;
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}
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}
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if (!pRange) {
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for (pRange = &BusHandler->BusAddresses->Memory; pRange; pRange = pRange->Next) {
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if (BusAddress.QuadPart >= pRange->Base &&
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BusAddress.QuadPart <= pRange->Limit) {
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break;
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}
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}
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}
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break;
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case 1:
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// verify IO address is within buses IO limits
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for (pRange = &BusHandler->BusAddresses->IO; pRange; pRange = pRange->Next) {
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if (BusAddress.QuadPart >= pRange->Base &&
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BusAddress.QuadPart <= pRange->Limit) {
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break;
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}
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}
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break;
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}
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if (pRange) {
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TranslatedAddress->QuadPart = BusAddress.QuadPart + pRange->SystemBase;
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*AddressSpace = pRange->SystemAddressSpace;
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return TRUE;
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}
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return FALSE;
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}
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ULONG
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HalpGetSystemInterruptVector(
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IN PBUS_HANDLER BusHandler,
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IN PBUS_HANDLER RootHandler,
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IN ULONG BusInterruptLevel,
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IN ULONG BusInterruptVector,
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OUT PKIRQL Irql,
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OUT PKAFFINITY Affinity
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)
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/*++
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Routine Description:
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Arguments:
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BusInterruptLevel - Supplies the bus specific interrupt level.
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BusInterruptVector - Supplies the bus specific interrupt vector.
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Irql - Returns the system request priority.
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Affinity - Returns the system wide irq affinity.
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Return Value:
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Returns the system interrupt vector corresponding to the specified device.
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--*/
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{
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UNREFERENCED_PARAMETER( BusHandler );
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UNREFERENCED_PARAMETER( RootHandler );
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UNREFERENCED_PARAMETER( BusInterruptVector );
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if (BusInterruptLevel > HIGHEST_8259_VECTOR) {
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//
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// Invalid BusInterruptLevel, so return Affinity of 0x0000;
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//
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*Affinity = 0;
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return(DEVICE_VECTORS);
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} else {
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*Affinity = 1;
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//
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// Translate BusInterruptLevel to IRQL
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//
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*Irql = HalpTranslateVectorToIrql(BusInterruptLevel);
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//
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// The vector is equal to the specified bus level + DEVICE_VECTORS.
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//
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return(BusInterruptLevel + DEVICE_VECTORS);
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}
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}
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