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133 lines
3.4 KiB
133 lines
3.4 KiB
//#pragma comment(exestr, "$Header: /usr4/winnt/SOURCES/ddk35/src/hal/halsni/mips/RCS/jxmapio.c,v 1.1 1994/10/13 15:47:06 holli Exp $")
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/*++
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Copyright (c) 1993 - 1994 Siemens Nixdorf Informationssysteme AG
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Copyright (c) 1991 - 1994 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 for a SNI
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or R4x00 system.
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For use of EISA I/O Space during phase 0 we go via KSEG1_BASE
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Environment:
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Kernel mode
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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 =(PVOID) (EISA_CONTROL_PHYSICAL_BASE | KSEG1_BASE);
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PVOID HalpOnboardControlBase=(PVOID) (RM200_ONBOARD_CONTROL_PHYSICAL_BASE | KSEG1_BASE);
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PVOID HalpEisaMemoryBase =(PVOID) (EISA_MEMORY_PHYSICAL_BASE | KSEG1_BASE);
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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 R4x00 SNI
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system (Phase 1, so the mapping goes via MmMapIoSpace()).
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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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// (64KB I/O Space)
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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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// for the sni deskop model, may need an extra address space
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// HalpEisaExtensionInstalled can only be TRUE on RM200 (Desktop)
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//
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if (HalpEisaExtensionInstalled) {
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physicalAddress.HighPart = 0;
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physicalAddress.LowPart = RM200_ONBOARD_CONTROL_PHYSICAL_BASE;
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HalpOnboardControlBase = MmMapIoSpace(physicalAddress,
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PAGE_SIZE * 16,
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FALSE);
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} else
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//
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// In the SNI Minitower model, we have only one
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// address space
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//
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HalpOnboardControlBase = HalpEisaControlBase;
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//
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// Map EISA memory space so the x86 bios emulator emulator can
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// initialze a video adapter in an EISA/Isa slot.
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// (first 1MB only to have access to Card Bioses)
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// We do not have to call HalTranslateBusAddress on our SNI machines,
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// because we always use EISA_MEMORY_PHYSICAL_BASE for Extension Cards
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// on all machines
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//
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physicalAddress.HighPart = 0;
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physicalAddress.LowPart = EISA_MEMORY_PHYSICAL_BASE;
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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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(HalpOnboardControlBase == NULL) ||
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(HalpEisaMemoryBase == 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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