misc.c File Reference

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

Include dependency graph for misc.c:

Go to the source code of this file.

Macros
#define	NDEBUG

Functions
VOID NTAPI	HalpReportSerialNumber (VOID)
NTSTATUS NTAPI	HalpMarkAcpiHal (VOID)
NTSTATUS NTAPI	HalpOpenRegistryKey (IN PHANDLE KeyHandle, IN HANDLE RootKey, IN PUNICODE_STRING KeyName, IN ACCESS_MASK DesiredAccess, IN BOOLEAN Create)
VOID NTAPI	HalpCheckPowerButton (VOID)
VOID NTAPI	HalpFlushTLB (VOID)
UCHAR FASTCALL	HalSystemVectorDispatchEntry (IN ULONG Vector, OUT PKINTERRUPT_ROUTINE **FlatDispatch, OUT PKINTERRUPT_ROUTINE *NoConnection)
VOID NTAPI	KeFlushWriteBuffer (VOID)

Variables
UCHAR	HalpSerialLen
CHAR	HalpSerialNumber [31]

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 12 of file misc.c.

Function Documentation

HalpCheckPowerButton()

VOID NTAPI HalpCheckPowerButton

(

VOID

)

Definition at line 146 of file misc.c.

{
    //
    // Nothing to do on non-ACPI
    //
    return;
}

HalpFlushTLB()

VOID NTAPI HalpFlushTLB

(

VOID

)

Definition at line 156 of file misc.c.

{
    ULONG_PTR Flags, Cr4;
    INT CpuInfo[4];
    ULONG_PTR PageDirectory;

    //
    // Disable interrupts
    //
    Flags = __readeflags();
    _disable();

    //
    // Get page table directory base
    //
    PageDirectory = __readcr3();

    //
    // Check for CPUID support
    //
    if (KeGetCurrentPrcb()->CpuID)
    {
        //
        // Check for global bit in CPU features
        //
        __cpuid(CpuInfo, 1);
        if (CpuInfo[3] & 0x2000)
        {
            //
            // Get current CR4 value
            //
            Cr4 = __readcr4();

            //
            // Disable global bit
            //
            __writecr4(Cr4 & ~CR4_PGE);

            //
            // Flush TLB and re-enable global bit
            //
            __writecr3(PageDirectory);
            __writecr4(Cr4);

            //
            // Restore interrupts
            //
            __writeeflags(Flags);
            return;
        }
    }

    //
    // Legacy: just flush TLB
    //
    __writecr3(PageDirectory);
    __writeeflags(Flags);
}

Referenced by HalpMapPhysicalMemory64Vista(), HalpMapRealModeMemory(), HalpUnmapRealModeMemory(), and HalpUnmapVirtualAddressVista().

HalpMarkAcpiHal()

NTSTATUS NTAPI HalpMarkAcpiHal

(

VOID

)

Definition at line 57 of file misc.c.

{
    NTSTATUS Status;
    UNICODE_STRING KeyString;
    HANDLE KeyHandle;
    HANDLE Handle;
    ULONG Value = HalDisableFirmwareMapper ? 1 : 0;

    /* Open the control set key */
    RtlInitUnicodeString(&KeyString,
                         L"\\REGISTRY\\MACHINE\\SYSTEM\\CURRENTCONTROLSET");
    Status = HalpOpenRegistryKey(&Handle, 0, &KeyString, KEY_ALL_ACCESS, FALSE);
    if (NT_SUCCESS(Status))
    {
        /* Open the PNP key */
        RtlInitUnicodeString(&KeyString, L"Control\\Pnp");
        Status = HalpOpenRegistryKey(&KeyHandle,
                                     Handle,
                                     &KeyString,
                                     KEY_ALL_ACCESS,
                                     TRUE);
        /* Close root key */
        ZwClose(Handle);

        /* Check if PNP BIOS key exists */
        if (NT_SUCCESS(Status))
        {
            /* Set the disable value to false -- we need the mapper */
            RtlInitUnicodeString(&KeyString, L"DisableFirmwareMapper");
            Status = ZwSetValueKey(KeyHandle,
                                   &KeyString,
                                   0,
                                   REG_DWORD,
                                   &Value,
                                   sizeof(Value));

            /* Close subkey */
            ZwClose(KeyHandle);
        }
    }

    /* Return status */
    return Status;
}

Referenced by HalpReportResourceUsage().

HalpOpenRegistryKey()

NTSTATUS NTAPI HalpOpenRegistryKey	(	IN PHANDLE	KeyHandle,
		IN HANDLE	RootKey,
		IN PUNICODE_STRING	KeyName,
		IN ACCESS_MASK	DesiredAccess,
		IN BOOLEAN	Create
	)

Definition at line 104 of file misc.c.

{
    NTSTATUS Status;
    ULONG Disposition;
    OBJECT_ATTRIBUTES ObjectAttributes;

    /* Setup the attributes we received */
    InitializeObjectAttributes(&ObjectAttributes,
                               KeyName,
                               OBJ_CASE_INSENSITIVE,
                               RootKey,
                               NULL);

    /* What to do? */
    if ( Create )
    {
        /* Create the key */
        Status = ZwCreateKey(KeyHandle,
                             DesiredAccess,
                             &ObjectAttributes,
                             0,
                             NULL,
                             REG_OPTION_VOLATILE,
                             &Disposition);
    }
    else
    {
        /* Open the key */
        Status = ZwOpenKey(KeyHandle, DesiredAccess, &ObjectAttributes);
    }

    /* We're done */
    return Status;
}

Referenced by HalpMarkAcpiHal(), HalpMarkChipsetDecode(), and HalpReportSerialNumber().

HalpReportSerialNumber()

VOID NTAPI HalpReportSerialNumber

(

VOID

)

Definition at line 26 of file misc.c.

{
    NTSTATUS Status;
    UNICODE_STRING KeyString;
    HANDLE Handle;

    /* Make sure there is a serial number */
    if (!HalpSerialLen) return;

    /* Open the system key */
    RtlInitUnicodeString(&KeyString, L"\\Registry\\Machine\\Hardware\\Description\\System");
    Status = HalpOpenRegistryKey(&Handle, 0, &KeyString, KEY_ALL_ACCESS, FALSE);
    if (NT_SUCCESS(Status))
    {
        /* Add the serial number */
        RtlInitUnicodeString(&KeyString, L"Serial Number");
        ZwSetValueKey(Handle,
                      &KeyString,
                      0,
                      REG_BINARY,
                      HalpSerialNumber,
                      HalpSerialLen);

        /* Close the handle */
        ZwClose(Handle);
    }
}

Referenced by HalpReportResourceUsage().

HalSystemVectorDispatchEntry()

UCHAR FASTCALL HalSystemVectorDispatchEntry	(	IN ULONG	Vector,
		OUT PKINTERRUPT_ROUTINE **	FlatDispatch,
		OUT PKINTERRUPT_ROUTINE *	NoConnection
	)

Definition at line 222 of file misc.c.

{
    //
    // Not implemented on x86
    //
    return 0;
}

KeFlushWriteBuffer()

VOID NTAPI KeFlushWriteBuffer

(

VOID

)

Definition at line 237 of file misc.c.

{
    //
    // Not implemented on x86
    //
    return;
}

Variable Documentation

HalpSerialLen

UCHAR HalpSerialLen

Definition at line 17 of file misc.c.

Referenced by HalpReportSerialNumber().

HalpSerialNumber

CHAR HalpSerialNumber[31]

Definition at line 18 of file misc.c.

Referenced by HalpReportSerialNumber().