140 lines
3.1 KiB
C
140 lines
3.1 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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typedef
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VOID
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(*PSET_VIRTUAL_BASE) (
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IN ULONG Number,
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IN PVOID Base
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);
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PSET_VIRTUAL_BASE PrivateSetVirtualBase;
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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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ULONG FirmwareMapped = FALSE;
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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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PSYSTEM_PARAMETER_BLOCK SystemParameterBlock = (PSYSTEM_PARAMETER_BLOCK)(0x80001000);
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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 = EISA_CONTROL_PHYSICAL_BASE_HI;
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physicalAddress.LowPart = EISA_CONTROL_PHYSICAL_BASE_LO;
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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.HighPart = EISA_CONTROL_PHYSICAL_BASE_HI;
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physicalAddress.LowPart = EISA_CONTROL_PHYSICAL_BASE_LO + 0x71;
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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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// Map ISA Memory Space.
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//
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physicalAddress.HighPart = EISA_MEMORY_PHYSICAL_BASE_HI;
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physicalAddress.LowPart = EISA_MEMORY_PHYSICAL_BASE_LO;
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HalpEisaMemoryBase = MmMapIoSpace(physicalAddress,
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PAGE_SIZE*256,
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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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(HalpEisaMemoryBase == NULL)) {
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return FALSE;
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}
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//
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// Call private vector function SetVirtualBase so that the firmware functions for
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// the display controller can print characters to the screen. If SetVirtualBase does
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// not exist, then print an error message out the debug port and halt the system.
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//
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if ((SystemParameterBlock->VendorVectorLength / 4) >= 28) {
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PrivateSetVirtualBase = *(PSET_VIRTUAL_BASE *)((ULONG)(SystemParameterBlock->VendorVector) + 28*4);
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PrivateSetVirtualBase(0, HalpEisaControlBase);
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PrivateSetVirtualBase(1, HalpEisaMemoryBase);
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FirmwareMapped = TRUE;
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} else {
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KdPrint(("HAL : SetVirtualBase does not exist. Halting\n"));
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for(;;);
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}
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return TRUE;
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}
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