windows-nt/Source/XPSP1/NT/base/hals/halia64/ia64/i64bios.c

/*++

Copyright (c) 1996  Intel Corporation
Copyright (c) 1994  Microsoft Corporation

Module Name:

  i64bios.c  copied from hali64\x86bios.c

Abstract:


    This module implements the platform specific interface between a device
    driver and the execution of x86 ROM bios code for the device.

Author:

    William K. Cheung (wcheung) 20-Mar-1996

    based on the version by David N. Cutler (davec) 17-Jun-1994

Environment:

    Kernel mode only.

Revision History:
    Bernard Lint, M.Jayakumar November 1998

--*/

#include "halp.h"
#include "emulate.h"


#define LOW_MEM_SEGMET 0

#define LOW_MEM_OFFSET 0

#define SIZE_OF_VECTOR_TABLE 0x400

#define SIZE_OF_BIOS_DATA_AREA 0x400

extern XM_STATUS x86BiosExecuteInterrupt (
    IN UCHAR Number,
    IN OUT PXM86_CONTEXT Context,
    IN PVOID BiosIoSpace OPTIONAL,
    IN PVOID BiosIoMemory OPTIONAL
    );

extern PVOID x86BiosTranslateAddress (
    IN USHORT Segment,
    IN USHORT Offset
    );

//
// Initialize Default X86 bios spaces
//


#define NUMBER_X86_PAGES (0x100000 / PAGE_SIZE)      // map through 0xfffff

PVOID HalpIoControlBase = NULL;
PVOID HalpIoMemoryBase =  NULL;


//
// Define global data.
//



ULONG HalpX86BiosInitialized = FALSE;
ULONG HalpEnableInt10Calls = FALSE;


VOID
HalpInitIoMemoryBase(
    VOID
    )

/*++

Routine Description:

Arguements:

Return Value:

--*/
{

    PHYSICAL_ADDRESS COMPATIBLE_PCI_PHYSICAL_BASE_ADDRESS = { 0x0};
    HalpIoMemoryBase = (PUCHAR)HalpMapPhysicalMemory (
        COMPATIBLE_PCI_PHYSICAL_BASE_ADDRESS,
        (ULONG) NUMBER_X86_PAGES,
        (MEMORY_CACHING_TYPE)MmNonCached
        );
    ASSERT(HalpIoMemoryBase);

}


ULONG
HalpSetCmosData (
    IN PVOID BusHandler,
    IN PVOID RootHandler,
    IN ULONG SlotNumber,
    IN PVOID Buffer,
    IN ULONG Offset,
    IN ULONG Length
    )

/*++

Routine Description:

Arguements:

Return Value:

--*/

{
    return 0;
}


ULONG
HalpGetCmosData (
    IN ULONG BusNumber,
    IN ULONG SlotNumber,
    IN PVOID Buffer,
    IN ULONG Length
    )

/*++

Routine Description:

Arguements:

Return Value:

--*/


{
    return 0;
}


VOID
HalpAcquireCmosSpinLock (
    VOID
        )

/*++

Routine Description:

Arguements:

Return Value:

--*/


{
    return;
}


VOID
HalpReleaseCmosSpinLock (
    VOID
    )

/*++

Routine Description:

Arguements:

Return Value:

--*/

{
    return ;
}


HAL_DISPLAY_BIOS_INFORMATION
HalpGetDisplayBiosInformation (
    VOID
    )

/*++

Routine Description:


Arguements:


Return Value:

--*/




{
    return 8;
}


VOID
HalpInitializeCmos (
    VOID
    )

/*++

Routine Description:

Arguements:

Return Value:

--*/


{
    return ;
}


VOID
HalpReadCmosTime (
    PTIME_FIELDS TimeFields
    )

/*++

Routine Description:

Arguements:

Return Value:

--*/

{
    return ;
}

VOID
HalpWriteCmosTime (
    PTIME_FIELDS TimeFields
    )

/*++

Routine Description:

Arguements:

Return Value:

--*/


{
    return;
}



VOID
HalpBiosDisplayReset (
    VOID
    )

/*++

Routine Description:


Arguements:


Return Value:

--*/

{
    //
    // Make an int10 call to set the display into 640x480 16 color mode
    //
    // mov ax, 12h
    // int 10h
    //

    ULONG Eax = 0x12;
    ULONG Exx = 0x00;

    HalCallBios(0x10,
                &Eax,
                &Exx,
                &Exx,
                &Exx,
                &Exx,
                &Exx,
                &Exx);

    return;
}


BOOLEAN
HalCallBios (
    IN ULONG BiosCommand,
    IN OUT PULONG Eax,
    IN OUT PULONG Ebx,
    IN OUT PULONG Ecx,
    IN OUT PULONG Edx,
    IN OUT PULONG Esi,
    IN OUT PULONG Edi,
    IN OUT PULONG Ebp
    )

/*++

Routine Description:

    This function provides the platform specific interface between a device
    driver and the execution of the x86 ROM bios code for the specified ROM
    bios command.

Arguments:

    BiosCommand - Supplies the ROM bios command to be emulated.

    Eax to Ebp - Supplies the x86 emulation context.

Return Value:

    A value of TRUE is returned if the specified function is executed.
    Otherwise, a value of FALSE is returned.

--*/

{

    XM86_CONTEXT Context;

    HalDebugPrint(( HAL_INFO, "HAL: HalCallBios - Cmd = 0x%x, eax = 0x%p\n", BiosCommand, Eax ));
    //
    // If the x86 BIOS Emulator has not been initialized, then return FALSE.
    //

    if (HalpX86BiosInitialized == FALSE) {
        return FALSE;
    }

    //
    // If the Adapter BIOS initialization failed and an Int10 command is
    // specified, then return FALSE.
    //

    if ((BiosCommand == 0x10) && (HalpEnableInt10Calls == FALSE)) {
        return FALSE;
    }

    //
    // Copy the x86 bios context and emulate the specified command.
    //

    Context.Eax = *Eax;
    Context.Ebx = *Ebx;
    Context.Ecx = *Ecx;
    Context.Edx = *Edx;
    Context.Esi = *Esi;
    Context.Edi = *Edi;
    Context.Ebp = *Ebp;


    if (x86BiosExecuteInterrupt((UCHAR)BiosCommand,
        &Context,
        (PVOID)HalpIoControlBase,
        (PVOID)HalpIoMemoryBase) != XM_SUCCESS) {

        HalDebugPrint(( HAL_ERROR, "HAL: HalCallBios - ERROR in Cmd = 0x%x\n", BiosCommand ));
        return FALSE;

    }

    //
    // Copy the x86 bios context and return TRUE.
    //

    *Eax = Context.Eax;
    *Ebx = Context.Ebx;
    *Ecx = Context.Ecx;
    *Edx = Context.Edx;
    *Esi = Context.Esi;
    *Edi = Context.Edi;
    *Ebp = Context.Ebp;
    return TRUE;
}

VOID
HalpInitializeX86Int10Call(
    VOID
    )

/*++

Routine Description:

    This function initializes x86 bios emulator, display data area and
    interrupt vector area.


Arguments:

    None.

Return Value:

    None.

--*/

{
    XM86_CONTEXT State;
    PXM86_CONTEXT Context;
    PULONG x86BiosLowMemoryPtr, PhysicalMemoryPtr;

    //
    // Initialize the x86 bios emulator.
    //

    x86BiosInitializeBios(HalpIoControlBase, HalpIoMemoryBase);


    x86BiosLowMemoryPtr = (PULONG)(x86BiosTranslateAddress(LOW_MEM_SEGMET, LOW_MEM_OFFSET));
    PhysicalMemoryPtr   = (PULONG) HalpIoMemoryBase;

    //
    // Copy the VECTOR TABLE from 0 to 2k. This is because we are not executing
    // the initialization of Adapter since SAL takes care of it. However, the
    // emulation memory needs to be updated from the interrupt vector and BIOS
    // data area.
    //

    RtlCopyMemory(x86BiosLowMemoryPtr,
                  PhysicalMemoryPtr,
                  (SIZE_OF_VECTOR_TABLE+SIZE_OF_BIOS_DATA_AREA)
                  );


    HalpX86BiosInitialized = TRUE;
    HalpEnableInt10Calls = TRUE;
    return;
}


VOID
HalpResetX86DisplayAdapter(
    VOID
    )

/*++

Routine Description:

    This function resets a display adapter using the x86 bios emulator.

Arguments:

    None.

Return Value:

    None.

--*/

{
    ULONG Eax;
    ULONG Ebx;
    ULONG Ecx;
    ULONG Edx;
    ULONG Esi;
    ULONG Edi;
    ULONG Ebp;

    //
    // Initialize the x86 bios context and make the INT 10 call to initialize
    // the display adapter to 80x25 color text mode.
    //

    Eax = 0x0003;  // Function 0, Mode 3
    Ebx = 0;
    Ecx = 0;
    Edx = 0;
    Esi = 0;
    Edi = 0;
    Ebp = 0;

    HalCallBios(0x10,
        &Eax,
        &Ebx,
        &Ecx,
        &Edx,
        &Esi,
        &Edi,
        &Ebp);
}