109 lines
2.0 KiB
C
109 lines
2.0 KiB
C
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/*++
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Copyright (c) 1991 Microsoft Corporation
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Module Name:
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jxmapio.c
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Abstract:
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This module implements the mapping of HAL I/O space a MIPS R3000
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or R4000 Jazz system.
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Author:
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David N. Cutler (davec) 28-Apr-1991
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Environment:
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Kernel mode
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Revision History:
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--*/
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#include "halp.h"
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//
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// Put all code for HAL initialization in the INIT section. It will be
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// deallocated by memory management when phase 1 initialization is
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// completed.
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//
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#if defined(ALLOC_PRAGMA)
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#pragma alloc_text(INIT, HalpMapIoSpace)
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#endif
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//
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// Define global data used to locate the EISA control space and the realtime
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// clock registers.
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//
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PVOID HalpEisaControlBase;
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PVOID HalpEisaMemoryBase;
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PVOID HalpRealTimeClockBase;
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BOOLEAN
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HalpMapIoSpace (
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VOID
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)
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/*++
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Routine Description:
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This routine maps the HAL I/O space for a MIPS R3000 or R4000 Jazz
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system.
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Arguments:
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None.
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Return Value:
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If the initialization is successfully completed, than a value of TRUE
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is returned. Otherwise, a value of FALSE is returned.
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--*/
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{
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PHYSICAL_ADDRESS physicalAddress;
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//
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// Map EISA control space. Map all 16 slots. This is done so the NMI
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// code can probe the cards.
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//
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physicalAddress.HighPart = 0;
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physicalAddress.LowPart = EISA_CONTROL_PHYSICAL_BASE;
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HalpEisaControlBase = MmMapIoSpace(physicalAddress,
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PAGE_SIZE * 16,
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FALSE);
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//
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// Map realtime clock registers.
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//
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physicalAddress.LowPart = RTCLOCK_PHYSICAL_BASE;
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HalpRealTimeClockBase = MmMapIoSpace(physicalAddress,
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PAGE_SIZE,
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FALSE);
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//
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// If either mapped address is NULL, then return FALSE as the function
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// value. Otherwise, return TRUE.
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//
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if ((HalpEisaControlBase == NULL) ||
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(HalpRealTimeClockBase == NULL)) {
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return FALSE;
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} else {
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return TRUE;
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}
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}
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