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/*++
Copyright (c) 1992 Microsoft Corporation
Module Name:
detsup.c
Abstract:
Various detection code is included from the HALs and this module
includes compatible functions for setup
Revision History:
--*/
#include "setupldr.h"
#define _NTHAL_
#define _HALI_
//
// Include NCR detection code
//
#define SETUP
#include "halx86\i386\ncrdetct.c"
//
// Include AST detection code
//
#define ASTMP 1
#include "halast\i386\astdetct.c"
//
// Include Corollary detection code
//
#include "halcbus\i386\cbdetect.c"
//
// Include MPS 1.1 detection code
//
#include "halmps\i386\mpdetect.c"
//
// Thunk functions.
// Equivalent Hal functions which various detection code may use
//
PVOID
HalpMapPhysicalMemory(
IN PVOID PhysicalAddress,
IN ULONG NumberPages
)
/*++
Routine Description:
This routine maps physical memory into the area of virtual memory.
Arguments:
PhysicalAddress - Supplies the physical address of the start of the
area of physical memory to be mapped.
NumberPages - Supplies the number of pages contained in the area of
physical memory to be mapped.
Return Value:
PVOID - Virtual address at which the requested block of physical memory
was mapped
--*/
{
extern PHARDWARE_PTE HalPT;
ULONG PageFrame;
ULONG i, j, PagesMapped;
PageFrame = ((ULONG) PhysicalAddress) >> PAGE_SHIFT;
if (PageFrame >= 1 && PageFrame+NumberPages < 0x1000) {
//
// The lower 16M is 'identity' mapped with the physical addresses.
//
return PhysicalAddress;
}
//
// Map a pointer to the address requested
//
for (i=0; i <= 1024-NumberPages; i++) {
for (j=0; j < NumberPages; j++) {
if ( ((PULONG)HalPT)[i+j] ) {
break;
}
}
if (j == NumberPages) {
for (j=0; j<NumberPages; j++) {
HalPT[i+j].PageFrameNumber = PageFrame+j;
HalPT[i+j].Valid = 1;
HalPT[i+j].Write = 1;
}
j = 0xffc00000 | (i<<12) | (((ULONG) PhysicalAddress) & 0xfff);
return (PVOID) j;
}
}
SlFatalError((ULONG)PhysicalAddress);
return NULL;
}
PVOID
HalpMapPhysicalMemoryWriteThrough(
IN PVOID PhysicalAddress,
IN ULONG NumberPages
)
/*++
Routine Description:
This routine maps physical memory into the area of virtual memory.
Arguments:
PhysicalAddress - Supplies the physical address of the start of the
area of physical memory to be mapped.
NumberPages - Supplies the number of pages contained in the area of
physical memory to be mapped.
Return Value:
PVOID - Virtual address at which the requested block of physical memory
was mapped
--*/
{
extern PHARDWARE_PTE HalPT;
ULONG PageFrame;
ULONG i, j, PagesMapped;
PageFrame = ((ULONG) PhysicalAddress) >> PAGE_SHIFT;
//
// Map a pointer to the address requested
//
for (i=0; i <= 1024-NumberPages; i++) {
for (j=0; j < NumberPages; j++) {
if ( ((PULONG)HalPT)[i+j] ) {
break;
}
}
if (j == NumberPages) {
for (j=0; j<NumberPages; j++) {
HalPT[i+j].PageFrameNumber = PageFrame+j;
HalPT[i+j].Valid = 1;
HalPT[i+j].Write = 1;
HalPT[i+j].WriteThrough = 1;
HalPT[i+j].CacheDisable = 1;
}
j = 0xffc00000 | (i<<12) | (((ULONG) PhysicalAddress) & 0xfff);
return (PVOID) j;
}
}
SlFatalError((ULONG)PhysicalAddress);
return NULL;
}
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