reactos/hal/halx86/generic/halinit.c

/*
 * PROJECT:         ReactOS HAL
 * LICENSE:         GPL - See COPYING in the top level directory
 * FILE:            hal/halx86/generic/halinit.c
 * PURPOSE:         HAL Entrypoint and Initialization
 * PROGRAMMERS:     Alex Ionescu (alex.ionescu@reactos.org)
 */

/* INCLUDES ******************************************************************/

#include <hal.h>
#define NDEBUG
#include <debug.h>

/* GLOBALS *******************************************************************/

BOOLEAN HalpPciLockSettings;

/* PRIVATE FUNCTIONS *********************************************************/

CODE_SEG("INIT")
VOID
NTAPI
HalpGetParameters(IN PLOADER_PARAMETER_BLOCK LoaderBlock)
{
    PCHAR CommandLine;

    /* Make sure we have a loader block and command line */
    if ((LoaderBlock) && (LoaderBlock->LoadOptions))
    {
        /* Read the command line */
        CommandLine = LoaderBlock->LoadOptions;

        /* Check if PCI is locked */
        if (strstr(CommandLine, "PCILOCK")) HalpPciLockSettings = TRUE;

        /* Check for initial breakpoint */
        if (strstr(CommandLine, "BREAK")) DbgBreakPoint();
    }
}

/* FUNCTIONS *****************************************************************/

VOID
NTAPI
HalInitializeProcessor(
    IN ULONG ProcessorNumber,
    IN PLOADER_PARAMETER_BLOCK LoaderBlock)
{
    /* Hal specific initialization for this cpu */
    HalpInitProcessor(ProcessorNumber, LoaderBlock);

    /* Set default stall count */
    KeGetPcr()->StallScaleFactor = INITIAL_STALL_COUNT;

    /* Update the interrupt affinity and processor mask */
    InterlockedBitTestAndSet((PLONG)&HalpActiveProcessors, ProcessorNumber);
    InterlockedBitTestAndSet((PLONG)&HalpDefaultInterruptAffinity,
                             ProcessorNumber);

    /* Register routines for KDCOM */
    HalpRegisterKdSupportFunctions();
}

/*
 * @implemented
 */
CODE_SEG("INIT")
BOOLEAN
NTAPI
HalInitSystem(IN ULONG BootPhase,
              IN PLOADER_PARAMETER_BLOCK LoaderBlock)
{
    PKPRCB Prcb = KeGetCurrentPrcb();
    NTSTATUS Status;

    /* Check the boot phase */
    if (BootPhase == 0)
    {
        /* Phase 0... save bus type */
        HalpBusType = LoaderBlock->u.I386.MachineType & 0xFF;

        /* Get command-line parameters */
        HalpGetParameters(LoaderBlock);

        /* Check for PRCB version mismatch */
        if (Prcb->MajorVersion != PRCB_MAJOR_VERSION)
        {
            /* No match, bugcheck */
            KeBugCheckEx(MISMATCHED_HAL, 1, Prcb->MajorVersion, PRCB_MAJOR_VERSION, 0);
        }

        /* Checked/free HAL requires checked/free kernel */
        if (Prcb->BuildType != HalpBuildType)
        {
            /* No match, bugcheck */
            KeBugCheckEx(MISMATCHED_HAL, 2, Prcb->BuildType, HalpBuildType, 0);
        }

        /* Initialize ACPI */
        Status = HalpSetupAcpiPhase0(LoaderBlock);
        if (!NT_SUCCESS(Status))
        {
            KeBugCheckEx(ACPI_BIOS_ERROR, Status, 0, 0, 0);
        }

        /* Initialize the PICs */
        HalpInitializePICs(TRUE);

        /* Initialize CMOS lock */
        KeInitializeSpinLock(&HalpSystemHardwareLock);

        /* Initialize CMOS */
        HalpInitializeCmos();

        /* Fill out the dispatch tables */
        HalQuerySystemInformation = HaliQuerySystemInformation;
        HalSetSystemInformation = HaliSetSystemInformation;
        HalInitPnpDriver = HaliInitPnpDriver;
        HalGetDmaAdapter = HalpGetDmaAdapter;

        HalGetInterruptTranslator = NULL;  // FIXME: TODO
        HalResetDisplay = HalpBiosDisplayReset;
        HalHaltSystem = HaliHaltSystem;

        /* Setup I/O space */
        HalpDefaultIoSpace.Next = HalpAddressUsageList;
        HalpAddressUsageList = &HalpDefaultIoSpace;

        /* Setup busy waiting */
        HalpCalibrateStallExecution();

        /* Initialize the clock */
        HalpInitializeClock();

        /*
         * We could be rebooting with a pending profile interrupt,
         * so clear it here before interrupts are enabled
         */
        HalStopProfileInterrupt(ProfileTime);

        /* Do some HAL-specific initialization */
        HalpInitPhase0(LoaderBlock);

        /* Initialize Phase 0 of the x86 emulator */
        HalInitializeBios(0, LoaderBlock);
    }
    else if (BootPhase == 1)
    {
        /* Initialize bus handlers */
        HalpInitBusHandlers();

        /* Do some HAL-specific initialization */
        HalpInitPhase1();

        /* Initialize Phase 1 of the x86 emulator */
        HalInitializeBios(1, LoaderBlock);
    }

    /* All done, return */
    return TRUE;
}