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/*++
Copyright (c) 1992 AST Research Inc.
Module Name:
astdetct.c
Abstract:
Author:
Bob Beard (v-bobb) 24-Jul-1992
Environment:
Kernel mode only.
Revision History:
Bob Beard (v-bobb) 19-Aug-1992 detect if MP
Quang Phan (v-quangp) 27-Aug-1992 modified to work with the NT Setup
program.
--*/
#ifndef _NTOS_
#include "nthal.h"
#endif
#include "halp.h"
#include "astebiii.h"
#define AST_MANUFACTURER_ID 0x0674
#define AST_EBI2_STRING 0x32494245
ULONG ProcCount;
//#define MAX_EBI_SLOTS 32L
//VOID* EBI2_MMIOTable[MAX_EBI_SLOTS];
//
// EBI_II function offset table
//
EBI_II EBI2_CallTab;
//
// Global pointer to BIOS
//
PVOID BiosPtr;
BOOLEAN
GetProcCount()
/*++
Routine Description:
Call EBI2 to get the number of processors in the system.
To make this call work with the NT current Setup environment,
(memory address limited to 16MB), a fake MMIOTable is passed to EBI.
ProcCount contains the number of processors in the system.
Arguments:
none.
Return Value:
True if successfully initialized. False otherwise.
--*/
{
ULONG i;
ULONG *Alias = (ULONG *)&EBI2_CallTab;
ebi_iiSig *Sig = (ebi_iiSig*)((ULONG)BiosPtr + EBI_II_SIGNATURE);
ULONG *OffTab;
//
// Build the EBI II offset table
//
OffTab =(ULONG *) ((ULONG)BiosPtr + (REAL_TO_LIN(Sig->seg,Sig->off) -
REAL_TO_LIN(BIOS_SEG, 0)));
for( i = 0; i < ( sizeof( offsetTable ) / sizeof( ULONG )); i++ )
Alias[i] = OffTab[i] + (ULONG)BiosPtr;
//
// Find out the number of good processors
//
if ( (EBI2_CallTab.GetNumProcs)( (VOID *) 0, &ProcCount ) )
return(FALSE);
return(TRUE);
}
ULONG
DetectAST(
OUT PBOOLEAN IsConfiguredMp
)
/*++
Routine Description:
Determine on which AST platform we are running. Special HAL is needed
for EBI II based AST machines.
Arguments:
PBOOLEAN IsConfiguredMp returns with value of TRUE if MP. FALSE if
UP.
Return Value:
Boolean that indicates if AST EBI II platform is detected. TRUE means
an AST EBI II platform was detected. FALSE indicates it was not.
--*/
{
USHORT ManufacturerId;
PULONG EBI2StringPtr;
ULONG ProcCount;
UCHAR ProductId;
//
// Read the EISA ManufactuerID and check for AST
//
ManufacturerId = (((USHORT)(READ_PORT_UCHAR((PUCHAR)0xc80))) << 8)
| (READ_PORT_UCHAR((PUCHAR)0xc81));
if (ManufacturerId != AST_MANUFACTURER_ID)
return(FALSE);
//
//This HAL works with Manhattans that have EISA's ProductId 0x40-0x4F.
//
ProductId = ((READ_PORT_UCHAR((PUCHAR)0xc82)));
if ((ProductId & 0xF0) != 0x40)
return(FALSE);
//
// Map in all of AST BIOS for EBI II calls
//
BiosPtr = (PVOID)((ULONG)REAL_TO_LIN( BIOS_SEG, 0 ));
BiosPtr = HalpMapPhysicalMemory(BiosPtr, 0x10000/PAGE_SIZE); // assumes PAGE_SIZE <= 64k
if (BiosPtr == NULL)
return(FALSE);
EBI2StringPtr = (PULONG)((ULONG)BiosPtr + EBI_II_SIGNATURE);
if (*EBI2StringPtr != AST_EBI2_STRING)
return(FALSE);
//
// Call EBI II to get num. of processors
//
if (!GetProcCount())
return(FALSE);
//
// This is an MP hal
//
*IsConfiguredMp = TRUE;
return(TRUE);
}
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