254 lines
7.4 KiB
C
254 lines
7.4 KiB
C
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/*++
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Copyright (c) 1992 NCR Corporation
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Module Name:
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ncrdetect.c
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Abstract:
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Authors:
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Richard Barton (o-richb) 24-Jan-1992
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Brian Weischedel 30-Nov-1992
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Environment:
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Kernel mode only.
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Revision History:
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--*/
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#ifndef _NTOS_
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#include "nthal.h"
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#endif
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PVOID
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HalpMapPhysicalMemory(
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IN PVOID PhysicalAddress,
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IN ULONG NumberPages
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);
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VOID
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ReadCMOS(
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IN ULONG StartingOffset,
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IN ULONG Count,
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IN PUCHAR ReturnValuePtr);
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ULONG NCRPlatform;
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#define NCR3450 0x35333433 // Copied here to build standalone
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#define NCR3550 0x30353834
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#define NCR3360 0x33333630
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// WPD definitions:
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PUCHAR WPDStringID = "NCR Voyager-1";
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PUCHAR WPDPlatformName = "System 3360";
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#define WPDStringIDLength 13
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#define WPDStringIDRangeStart (0xE000 << 4) // physical address
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#define WPDStringIDRangeSize 0x10000 // 1 segment (64k)
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// MSBU definitions:
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PUCHAR MSBUCopyrightString = "Copyright (C) ???? NCR\0";
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#define MSBUCopyrightStringLen 23
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#define MSBUCopyrightPhysicalPtr ((0xF000 << 4) + (0xE020))
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typedef struct {
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ULONG ClassFromFirmware;
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PUCHAR PlatformName;
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} MSBUPlatformMapEntry;
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MSBUPlatformMapEntry MSBUPlatformMap[] = {{NCR3450, "System 3450"},
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{NCR3550, "System 3550"},
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{0, 0}};
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PUCHAR
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NCRDeterminePlatform(
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OUT PBOOLEAN IsConfiguredMp
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)
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/*++
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Routine Description:
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Determine on which NCR platform we are running. For now just display
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a message. Later we may not continue the boot if we're on an
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unrecognized platform.
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Arguments:
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none.
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Return Value:
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Pointer to character string identifying which NCR platform. NULL means
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it is unrecognized, and we shouldn't continue.
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--*/
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{
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BOOLEAN Matchfound;
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MSBUPlatformMapEntry *MSBUPlatformMapPtr;
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PVOID BIOSPagePtr;
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PUCHAR StringPtr;
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PUCHAR CopyrightPtr;
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PUCHAR SearchPtr;
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UCHAR CpuFlags;
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// first check for a WPD platform by searching the 0xE000 BIOS segment
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// for a ROM string that identifies this system as a 3360
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// get virtual address to the BIOS region (assuming region is both
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// page aligned and multiple pages in size)
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BIOSPagePtr = HalpMapPhysicalMemory((PVOID) WPDStringIDRangeStart,
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(WPDStringIDRangeSize >> 12));
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if (BIOSPagePtr != NULL) {
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SearchPtr = BIOSPagePtr; // begin search at start of region
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Matchfound = FALSE;
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// search until string is found or we are beyond the region
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while (!Matchfound && (SearchPtr <= (PUCHAR)((ULONG)BIOSPagePtr +
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WPDStringIDRangeSize -
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WPDStringIDLength))) {
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// see if SearchPtr points to the desired string
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StringPtr = (PUCHAR)((ULONG)SearchPtr++);
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CopyrightPtr = WPDStringID;
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// continue compare as long as characters compare
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// and not at end of string
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while ((Matchfound = (*CopyrightPtr++ == *StringPtr++)) &&
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(CopyrightPtr < WPDStringID + WPDStringIDLength));
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}
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// see if string was found (i.e., if this is a 3360)
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if (Matchfound) {
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// store system identifier ("3360") for later HAL use
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NCRPlatform = NCR3360;
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// read CPU good flags from CMOS and determine if MP
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ReadCMOS(0x88A, 1, &CpuFlags);
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// *IsConfiguredMp = (CpuFlags & (CpuFlags-1)) ? TRUE : FALSE;
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// This is an MP hal
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*IsConfiguredMp = TRUE;
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return(WPDPlatformName);
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}
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}
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// now check for an MSBU platform
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/*
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* Map in the BIOS text so we can look for our copyright string.
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*/
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BIOSPagePtr = (PVOID)((ULONG)MSBUCopyrightPhysicalPtr &
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~(PAGE_SIZE - 1));
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BIOSPagePtr = HalpMapPhysicalMemory(BIOSPagePtr, 2);
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if (BIOSPagePtr == NULL)
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return(NULL);
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StringPtr = (PUCHAR)((ULONG)BIOSPagePtr +
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((ULONG)MSBUCopyrightPhysicalPtr & (PAGE_SIZE - 1)))
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+ (MSBUCopyrightStringLen - 1);
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CopyrightPtr = MSBUCopyrightString + (MSBUCopyrightStringLen - 1);
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do {
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Matchfound = ((*CopyrightPtr == '?') ||
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(*CopyrightPtr == *StringPtr));
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--CopyrightPtr;
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--StringPtr;
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} while (Matchfound && (CopyrightPtr >= MSBUCopyrightString));
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//
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// /*
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// * Clear the mapping to BIOS. We mapped in two pages.
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// */
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// BIOSPagePtr = MiGetPteAddress(BIOSPagePtr);
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// *(PULONG)BIOSPagePtr = 0;
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// *(((PULONG)BIOSPagePtr)+1) = 0;
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// /*
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// * Flush the TLB.
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// */
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// _asm {
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// mov eax, cr3
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// mov cr3, eax
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// }
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//
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if (Matchfound) {
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/*
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* must be an MSBU machine..determine which.
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*/
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ReadCMOS(0xB16, 4, (PUCHAR)&NCRPlatform);
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for (MSBUPlatformMapPtr = MSBUPlatformMap;
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(MSBUPlatformMapPtr->ClassFromFirmware != 0);
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++MSBUPlatformMapPtr) {
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if (MSBUPlatformMapPtr->ClassFromFirmware ==
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NCRPlatform) {
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*IsConfiguredMp = TRUE;
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return(MSBUPlatformMapPtr->PlatformName);
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}
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}
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/*
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* prerelease version of firmware had this machine class
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* at the wrong offset into CMOS. until all those versions
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* of firmware are extinguished from the face of the earth
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* we should recognize them with this:
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*/
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ReadCMOS(0xAB3, 4, (PUCHAR)&NCRPlatform);
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for (MSBUPlatformMapPtr = MSBUPlatformMap;
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(MSBUPlatformMapPtr->ClassFromFirmware != 0);
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++MSBUPlatformMapPtr) {
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if (MSBUPlatformMapPtr->ClassFromFirmware ==
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NCRPlatform) {
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*IsConfiguredMp = TRUE;
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return(MSBUPlatformMapPtr->PlatformName);
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}
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}
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}
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return(NULL);
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}
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#ifndef SETUP // if built with Hal, must provide ReadCMOS routine
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ULONG
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HalpGetCmosData (
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IN ULONG SourceLocation,
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IN ULONG SourceAddress,
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IN PUCHAR Buffer,
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IN ULONG Length);
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VOID
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ReadCMOS(
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IN ULONG StartingOffset,
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IN ULONG Count,
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IN PUCHAR ReturnValuePtr
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)
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/*++
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Routine Description:
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This routine simply converts a ReadCMOS call (a routine in setup) to
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the corresponding routine provided in the Hal (HalpGetCmosData).
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--*/
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{
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HalpGetCmosData(1, StartingOffset, ReturnValuePtr, Count);
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}
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#endif
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