int10.c File Reference

#include "videoprt.h"
#include <ndk/kefuncs.h>
#include <ndk/mmfuncs.h>
#include <debug.h>
#include <ndk/halfuncs.h>

Include dependency graph for int10.c:

Go to the source code of this file.

Macros
#define	NDEBUG
#define	INT10(func)   IntInt10##func##Emu

Functions
static BOOLEAN	IntInitializeX86Emu (VOID)
static VP_STATUS NTAPI	IntInt10AllocateBufferEmu (_In_ PVOID Context, _Out_ PUSHORT Seg, _Out_ PUSHORT Off, _Inout_ PULONG Length)
VP_STATUS NTAPI	IntInt10AllocateBuffer (_In_ PVOID Context, _Out_ PUSHORT Seg, _Out_ PUSHORT Off, _Inout_ PULONG Length)
static VP_STATUS NTAPI	IntInt10FreeBufferEmu (_In_ PVOID Context, _In_ USHORT Seg, _In_ USHORT Off)
VP_STATUS NTAPI	IntInt10FreeBuffer (_In_ PVOID Context, _In_ USHORT Seg, _In_ USHORT Off)
static VP_STATUS NTAPI	IntInt10ReadMemoryEmu (_In_ PVOID Context, _In_ USHORT Seg, _In_ USHORT Off, _Out_writes_bytes_(Length) PVOID Buffer, _In_ ULONG Length)
VP_STATUS NTAPI	IntInt10ReadMemory (_In_ PVOID Context, _In_ USHORT Seg, _In_ USHORT Off, _Out_writes_bytes_(Length) PVOID Buffer, _In_ ULONG Length)
static VP_STATUS NTAPI	IntInt10WriteMemoryEmu (_In_ PVOID Context, _In_ USHORT Seg, _In_ USHORT Off, _In_reads_bytes_(Length) PVOID Buffer, _In_ ULONG Length)
VP_STATUS NTAPI	IntInt10WriteMemory (_In_ PVOID Context, _In_ USHORT Seg, _In_ USHORT Off, _In_reads_bytes_(Length) PVOID Buffer, _In_ ULONG Length)
static VP_STATUS NTAPI	IntInt10CallBiosEmu (_In_ PVOID Context, _Inout_ PINT10_BIOS_ARGUMENTS BiosArguments)
VP_STATUS NTAPI	IntInt10CallBios (_In_ PVOID Context, _Inout_ PINT10_BIOS_ARGUMENTS BiosArguments)
NTSTATUS	IntInitializeInt10 (VOID)
VP_STATUS NTAPI	VideoPortInt10 (IN PVOID HwDeviceExtension, IN PVIDEO_X86_BIOS_ARGUMENTS BiosArguments)

Variables
KMUTEX	VideoPortInt10Mutex

Macro Definition Documentation

INT10

#define INT10

(

func

)

IntInt10##func##Emu

Definition at line 295 of file int10.c.

NDEBUG

#define NDEBUG

Definition at line 27 of file int10.c.

Function Documentation

IntInitializeInt10()

NTSTATUS IntInitializeInt10

(

VOID

)

Definition at line 766 of file int10.c.

{
    static BOOLEAN FirstInitialization = FALSE;
 
    if (!FirstInitialization)
    {
        FirstInitialization = TRUE;
#ifdef _M_IX86
        /* Initialize the x86 emulator if necessary, otherwise fall back to V86 mode */
        if (!VideoPortDisableX86Emulator)
        {
            /* Use the emulation routines */
            //Int10Vtbl = &Int10IFace[0];
            if (IntInitializeX86Emu())
                return STATUS_SUCCESS;
            DPRINT1("Could not initialize the x86 emulator; falling back to V86 mode\n");
            VideoPortDisableX86Emulator = TRUE;
        }
 
        /* Fall back to the V86 routines */
        Int10Vtbl = &Int10IFace[1];
        return STATUS_SUCCESS;
#else
        /* Initialize the x86 emulator */
        return (IntInitializeX86Emu() ? STATUS_SUCCESS : STATUS_NOT_SUPPORTED);
#endif
    }
 
    /* We should only do that for CSRSS */
    ASSERT(PsGetCurrentProcess() == (PEPROCESS)CsrProcess);
#ifdef _M_IX86
    return IntInitializeVideoAddressSpace();
#else
    return STATUS_SUCCESS;
#endif
}

Referenced by IntVideoPortDispatchOpen(), and VideoPortInitialize().

IntInitializeX86Emu()

static BOOLEAN IntInitializeX86Emu ( VOID  )

static

Definition at line 87 of file int10.c.

{
#if (NTDDI_VERSION < NTDDI_VISTA) && (DLL_EXPORT_VERSION < _WIN32_WINNT_VISTA)
    UNICODE_STRING ImportName;
#define LOAD_IMPORT(func) \
    (RtlInitUnicodeString(&ImportName, L ## #func), \
     (func) = MmGetSystemRoutineAddress(&ImportName))
 
    if (!LOAD_IMPORT(x86BiosCall)) // Check also HalInitializeBios ?
        return FALSE; /* No emulator available */
    if (!LOAD_IMPORT(x86BiosAllocateBuffer))
        return FALSE;
    if (!LOAD_IMPORT(x86BiosFreeBuffer))
        return FALSE;
    if (!LOAD_IMPORT(x86BiosReadMemory))
        return FALSE;
    if (!LOAD_IMPORT(x86BiosWriteMemory))
        return FALSE;
#undef LOAD_IMPORT
#endif
 
    return TRUE;
}

Referenced by IntInitializeInt10().

IntInt10AllocateBuffer()

VP_STATUS NTAPI IntInt10AllocateBuffer	(	_In_ PVOID	Context,
		_Out_ PUSHORT	Seg,
		_Out_ PUSHORT	Off,
		_Inout_ PULONG	Length
	)

Definition at line 375 of file int10.c.

{
    VP_STATUS Status;
 
    TRACE_(VIDEOPRT, "IntInt10AllocateBuffer\n");
 
    Status = INT10(AllocateBuffer)(Context, Seg, Off, Length);
    if (Status == NO_ERROR)
    {
        INFO_(VIDEOPRT, "- Segment: 0x%x\n", *Seg);
        INFO_(VIDEOPRT, "- Offset : 0x%x\n", *Off);
        INFO_(VIDEOPRT, "- Length : 0x%x\n", *Length);
    }
    return Status;
}

Referenced by VideoPortQueryServices().

IntInt10AllocateBufferEmu()

static VP_STATUS NTAPI IntInt10AllocateBufferEmu ( _In_ PVOID  Context, _Out_ PUSHORT  Seg, _Out_ PUSHORT  Off, _Inout_ PULONG  Length  )

static

Definition at line 301 of file int10.c.

{
    NTSTATUS Status;
 
    UNREFERENCED_PARAMETER(Context);
 
    Status = x86BiosAllocateBuffer(Length, Seg, Off);
    return (NT_SUCCESS(Status) ? NO_ERROR : ERROR_NOT_ENOUGH_MEMORY);
}

IntInt10CallBios()

VP_STATUS NTAPI IntInt10CallBios	(	_In_ PVOID	Context,
		_Inout_ PINT10_BIOS_ARGUMENTS	BiosArguments
	)

Definition at line 737 of file int10.c.

{
    return INT10(CallBios)(Context, BiosArguments);
}

Referenced by VideoPortInt10(), and VideoPortQueryServices().

IntInt10CallBiosEmu()

static VP_STATUS NTAPI IntInt10CallBiosEmu ( _In_ PVOID  Context, _Inout_ PINT10_BIOS_ARGUMENTS  BiosArguments  )

static

Definition at line 593 of file int10.c.

{
    X86_BIOS_REGISTERS BiosContext;
    BOOLEAN Success;
 
    UNREFERENCED_PARAMETER(Context);
 
#ifdef _M_IX86
    if (!VDMAddressSpaceInitialized)
    {
        /* There are buggy 3rd-party miniport drivers that invoke the Int10 service
         * in their initialization routine, before the VDM address space has been
         * mapped and Ke386CallBios() can be called. They would therefore hit this
         * ASSERT. Instead, disable it, log an error and bail out. */
        //ASSERT(FALSE);
        ERR_(VIDEOPRT, "Warning: Attempt to call %s before Int10 support is initialized.\n", __FUNCTION__);
        return ERROR_INVALID_PARAMETER;
    }
#endif
 
    /* Clear the context and fill out the BIOS arguments */
    RtlZeroMemory(&BiosContext, sizeof(BiosContext));
    BiosContext.Eax = BiosArguments->Eax;
    BiosContext.Ebx = BiosArguments->Ebx;
    BiosContext.Ecx = BiosArguments->Ecx;
    BiosContext.Edx = BiosArguments->Edx;
    BiosContext.Esi = BiosArguments->Esi;
    BiosContext.Edi = BiosArguments->Edi;
    BiosContext.Ebp = BiosArguments->Ebp;
    BiosContext.SegDs = BiosArguments->SegDs;
    BiosContext.SegEs = BiosArguments->SegEs;
 
    /* Do the ROM BIOS call */
    (void)KeWaitForMutexObject(&VideoPortInt10Mutex,
                               Executive,
                               KernelMode,
                               FALSE,
                               NULL);
 
    Success = x86BiosCall(0x10, &BiosContext);
 
    KeReleaseMutex(&VideoPortInt10Mutex, FALSE);
 
    /* Return the arguments */
    BiosArguments->Eax = BiosContext.Eax;
    BiosArguments->Ebx = BiosContext.Ebx;
    BiosArguments->Ecx = BiosContext.Ecx;
    BiosArguments->Edx = BiosContext.Edx;
    BiosArguments->Esi = BiosContext.Esi;
    BiosArguments->Edi = BiosContext.Edi;
    BiosArguments->Ebp = BiosContext.Ebp;
    BiosArguments->SegDs = (USHORT)BiosContext.SegDs;
    BiosArguments->SegEs = (USHORT)BiosContext.SegEs;
 
    return (Success ? NO_ERROR : ERROR_INVALID_PARAMETER);
}

IntInt10FreeBuffer()

VP_STATUS NTAPI IntInt10FreeBuffer	(	_In_ PVOID	Context,
		_In_ USHORT	Seg,
		_In_ USHORT	Off
	)

Definition at line 444 of file int10.c.

{
    TRACE_(VIDEOPRT, "IntInt10FreeBuffer\n");
    INFO_(VIDEOPRT, "- Segment: 0x%x\n", Seg);
    INFO_(VIDEOPRT, "- Offset : 0x%x\n", Off);
 
    return INT10(FreeBuffer)(Context, Seg, Off);
}

Referenced by VideoPortQueryServices().

IntInt10FreeBufferEmu()

static VP_STATUS NTAPI IntInt10FreeBufferEmu ( _In_ PVOID  Context, _In_ USHORT  Seg, _In_ USHORT  Off  )

static

Definition at line 398 of file int10.c.

{
    NTSTATUS Status;
 
    UNREFERENCED_PARAMETER(Context);
 
    Status = x86BiosFreeBuffer(Seg, Off);
    return (NT_SUCCESS(Status) ? NO_ERROR : ERROR_INVALID_PARAMETER);
}

IntInt10ReadMemory()

VP_STATUS NTAPI IntInt10ReadMemory	(	_In_ PVOID	Context,
		_In_ USHORT	Seg,
		_In_ USHORT	Off,
		_Out_writes_bytes_(Length) PVOID	Buffer,
		_In_ ULONG	Length
	)

Definition at line 507 of file int10.c.

{
    TRACE_(VIDEOPRT, "IntInt10ReadMemory\n");
    INFO_(VIDEOPRT, "- Segment: 0x%x\n", Seg);
    INFO_(VIDEOPRT, "- Offset : 0x%x\n", Off);
    INFO_(VIDEOPRT, "- Buffer : 0x%x\n", Buffer);
    INFO_(VIDEOPRT, "- Length : 0x%x\n", Length);
 
    return INT10(ReadMemory)(Context, Seg, Off, Buffer, Length);
}

Referenced by VideoPortQueryServices().

IntInt10ReadMemoryEmu()

static VP_STATUS NTAPI IntInt10ReadMemoryEmu ( _In_ PVOID  Context, _In_ USHORT  Seg, _In_ USHORT  Off, _Out_writes_bytes_(Length) PVOID  Buffer, _In_ ULONG  Length  )

static

Definition at line 459 of file int10.c.

{
    NTSTATUS Status;
 
    UNREFERENCED_PARAMETER(Context);
 
    Status = x86BiosReadMemory(Seg, Off, Buffer, Length);
    return (NT_SUCCESS(Status) ? NO_ERROR : ERROR_INVALID_PARAMETER);
}

IntInt10WriteMemory()

VP_STATUS NTAPI IntInt10WriteMemory	(	_In_ PVOID	Context,
		_In_ USHORT	Seg,
		_In_ USHORT	Off,
		_In_reads_bytes_(Length) PVOID	Buffer,
		_In_ ULONG	Length
	)

Definition at line 574 of file int10.c.

{
    TRACE_(VIDEOPRT, "IntInt10WriteMemory\n");
    INFO_(VIDEOPRT, "- Segment: 0x%x\n", Seg);
    INFO_(VIDEOPRT, "- Offset : 0x%x\n", Off);
    INFO_(VIDEOPRT, "- Buffer : 0x%x\n", Buffer);
    INFO_(VIDEOPRT, "- Length : 0x%x\n", Length);
 
    return INT10(WriteMemory)(Context, Seg, Off, Buffer, Length);
}

Referenced by VideoPortQueryServices().

IntInt10WriteMemoryEmu()

static VP_STATUS NTAPI IntInt10WriteMemoryEmu ( _In_ PVOID  Context, _In_ USHORT  Seg, _In_ USHORT  Off, _In_reads_bytes_(Length) PVOID  Buffer, _In_ ULONG  Length  )

static

Definition at line 526 of file int10.c.

{
    NTSTATUS Status;
 
    UNREFERENCED_PARAMETER(Context);
 
    Status = x86BiosWriteMemory(Seg, Off, Buffer, Length);
    return (NT_SUCCESS(Status) ? NO_ERROR : ERROR_INVALID_PARAMETER);
}

VideoPortInt10()

VP_STATUS NTAPI VideoPortInt10	(	IN PVOID	HwDeviceExtension,
		IN PVIDEO_X86_BIOS_ARGUMENTS	BiosArguments
	)

Definition at line 811 of file int10.c.

{
    VP_STATUS Status;
    INT10_BIOS_ARGUMENTS Int10BiosArguments;
 
    /* Copy arguments to other format */
    RtlCopyMemory(&Int10BiosArguments, BiosArguments, sizeof(*BiosArguments));
    Int10BiosArguments.SegDs = 0;
    Int10BiosArguments.SegEs = 0;
 
    /* Do the BIOS call */
    Status = IntInt10CallBios(NULL, &Int10BiosArguments);
 
    /* Copy results back */
    RtlCopyMemory(BiosArguments, &Int10BiosArguments, sizeof(*BiosArguments));
 
    return Status;
}

Referenced by VbeSetMode().

Variable Documentation

VideoPortInt10Mutex

KMUTEX VideoPortInt10Mutex

Definition at line 41 of file int10.c.

Referenced by IntInt10CallBiosEmu(), and VideoPortInitialize().