windows-server-2003/base/boot/oschoice/i386/initx86.c

/*++

Copyright (c) 1992  Microsoft Corporation

Module Name:

    initx86.c

Abstract:

    Does any x86-specific initialization, then starts the common ARC osloader

Author:

    John Vert (jvert) 4-Nov-1993

Revision History:

--*/
#include "bldrx86.h"
#include "msg.h"
#include "stdio.h"

VOID
BlInitializeTerminal(
    VOID
    );


UCHAR BootPartitionName[80];
UCHAR KernelBootDevice[80];
UCHAR OsLoadFilename[100];
UCHAR OsLoaderFilename[100];
UCHAR SystemPartition[100];
UCHAR OsLoadPartition[100];
UCHAR OsLoadOptions[100];
UCHAR ConsoleInputName[50];
UCHAR MyBuffer[SECTOR_SIZE+32];
UCHAR ConsoleOutputName[50];
UCHAR X86SystemPartition[sizeof("x86systempartition=") + sizeof(BootPartitionName)];


VOID
BlStartup(
    IN PCHAR PartitionName
    )

/*++

Routine Description:

    Does x86-specific initialization, particularly presenting the boot.ini
    menu and running NTDETECT, then calls to the common osloader.

Arguments:

    PartitionName - Supplies the ARC name of the partition (or floppy) that
        setupldr was loaded from.

Return Value:

    Does not return

--*/

{
    ULONG Argc = 0;
    PUCHAR Argv[10];
    ARC_STATUS Status;
    ULONG BootFileId;
    PCHAR BootFile;
    ULONG Read;
    PCHAR p;
    ULONG i;
    ULONG DriveId;
    ULONG FileSize;
    ULONG Count;
    LARGE_INTEGER SeekPosition;
    PCHAR LoadOptions = NULL;
    BOOLEAN UseTimeOut=TRUE;
    BOOLEAN AlreadyInitialized = FALSE;
    extern BOOLEAN FwDescriptorsValid;

    //
    // Initialize ARC StdIo functionality
    //

    strcpy(ConsoleInputName,"consolein=multi(0)key(0)keyboard(0)");
    strcpy(ConsoleOutputName,"consoleout=multi(0)video(0)monitor(0)");
    Argv[0]=ConsoleInputName;
    Argv[1]=ConsoleOutputName;
    BlInitStdio (2, Argv);

    //
    // Initialize any dumb terminal that may be connected.
    //
    BlInitializeTerminal();

    //
    // Announce the loader
    //
    BlPrint(OsLoaderVersion);
    

    //
    // The main functionality of the OS chooser.
    //
    BlOsLoader( Argc, Argv, NULL );

    //
    // If we ever come back here, just wait to reboot.
    //
    if (!BlIsTerminalConnected()) {
        //
        // typical case.  wait for user to press a key and then 
        // restart
        //
        while(!BlGetKey());
    }
    else {
        // 
        // headless case.  present user with mini sac
        //
        while(!BlTerminalHandleLoaderFailure());
    }
    ArcRestart();
}

VOID
BlInitializeTerminal(
    VOID
    )

/*++

Routine Description:

    Does x86-specific initialization of a dumb terminal connected to a serial port.
    
Arguments:

    None.

Return Value:

    None.

--*/

{
    //
    // Clear any stale settings.
    //
    RtlZeroMemory( &LoaderRedirectionInformation, sizeof(HEADLESS_LOADER_BLOCK) );

    //
    // See if StartROM was redirecting.
    //
    if( (BOOLEAN)(BIOS_REDIRECT_SERVICE(1) != -1) ) {

        //
        // He is.  Pick up his settings.
        //

        LoaderRedirectionInformation.PortNumber = (ULONG)BIOS_REDIRECT_SERVICE(1);
        LoaderRedirectionInformation.BaudRate = (ULONG)BIOS_REDIRECT_SERVICE(2);
        LoaderRedirectionInformation.Parity = (BOOLEAN)BIOS_REDIRECT_SERVICE(3);
        LoaderRedirectionInformation.StopBits = (UCHAR)BIOS_REDIRECT_SERVICE(4);
    }
    
    
    //
    // Try to initialize the headless port.  Note that if we didn't get anything
    // from startrom, then this call will go out and query the BIOS for an
    // ACPI table to get settings from.
    //
    BlInitializeHeadlessPort();

}