#include "precomp.h"
#include <debug.h>
#include <drivers/xbox/xgpu.h>

Include dependency graph for bootvid.c:

Functions
static UCHAR	NvGetCrtc (ULONG Base, UCHAR Index)

static UCHAR	NvGetBytesPerPixel (ULONG Base, ULONG ScreenWidth)

static VOID	ApplyPalette (VOID)

BOOLEAN NTAPI	VidInitialize (_In_ BOOLEAN SetMode)

VOID NTAPI	VidCleanUp (VOID)

VOID NTAPI	VidResetDisplay (_In_ BOOLEAN HalReset)

VOID NTAPI	InitPaletteWithTable (_In_ PULONG Table, _In_ ULONG Count)

VOID	PrepareForSetPixel (VOID)

VOID	SetPixel (_In_ ULONG Left, _In_ ULONG Top, _In_ UCHAR Color)

VOID NTAPI	PreserveRow (_In_ ULONG CurrentTop, _In_ ULONG TopDelta, _In_ BOOLEAN Restore)

VOID NTAPI	DoScroll (_In_ ULONG Scroll)

VOID NTAPI	DisplayCharacter (_In_ CHAR Character, _In_ ULONG Left, _In_ ULONG Top, _In_ ULONG TextColor, _In_ ULONG BackColor)

VOID NTAPI	VidSolidColorFill (_In_ ULONG Left, _In_ ULONG Top, _In_ ULONG Right, _In_ ULONG Bottom, _In_ UCHAR Color)

VOID NTAPI	VidScreenToBufferBlt (_Out_writes_bytes_(Delta *Height) PUCHAR Buffer, _In_ ULONG Left, _In_ ULONG Top, _In_ ULONG Width, _In_ ULONG Height, _In_ ULONG Delta)

Variables
static ULONG_PTR	FrameBufferStart = 0

static ULONG	FrameBufferWidth

static ULONG	FrameBufferHeight

static ULONG	PanH

static ULONG	PanV

static UCHAR	BytesPerPixel

static RGBQUAD	CachedPalette [BV_MAX_COLORS]

static PUCHAR	BackBuffer = NULL

Function Documentation

◆ ApplyPalette()

static VOID ApplyPalette ( VOID )

static

Definition at line 56 of file bootvid.c.

{
    PULONG Frame = (PULONG)FrameBufferStart;
    ULONG x, y;
 
    /* Top panning */
    for (x = 0; x < PanV * FrameBufferWidth; x++)
    {
        *Frame++ = CachedPalette[0];
    }
 
    /* Left panning */
    for (y = 0; y < SCREEN_HEIGHT; y++)
    {
        Frame = (PULONG)(FrameBufferStart + FB_OFFSET(-PanH, y));
 
        for (x = 0; x < PanH; x++)
        {
            *Frame++ = CachedPalette[0];
        }
    }
 
    /* Screen redraw */
    PUCHAR Back = BackBuffer;
    for (y = 0; y < SCREEN_HEIGHT; y++)
    {
        Frame = (PULONG)(FrameBufferStart + FB_OFFSET(0, y));
 
        for (x = 0; x < SCREEN_WIDTH; x++)
        {
            *Frame++ = CachedPalette[*Back++];
        }
    }
 
    /* Right panning */
    for (y = 0; y < SCREEN_HEIGHT; y++)
    {
        Frame = (PULONG)(FrameBufferStart + FB_OFFSET(SCREEN_WIDTH, y));
 
        for (x = 0; x < PanH; x++)
        {
            *Frame++ = CachedPalette[0];
        }
    }
 
    /* Bottom panning */
    Frame = (PULONG)(FrameBufferStart + FB_OFFSET(-PanH, SCREEN_HEIGHT));
    for (x = 0; x < PanV * FrameBufferWidth; x++)
    {
        *Frame++ = CachedPalette[0];
    }
}

Referenced by InitPaletteWithTable().

◆ DisplayCharacter()

VOID NTAPI DisplayCharacter	(	_In_ CHAR	Character,
		_In_ ULONG	Left,
		_In_ ULONG	Top,
		_In_ ULONG	TextColor,
		_In_ ULONG	BackColor
	)

Definition at line 354 of file bootvid.c.

{
    /* Get the font and pixel pointer */
    PUCHAR FontChar = GetFontPtr(Character);
 
    /* Loop each pixel height */
    for (ULONG y = Top; y < Top + BOOTCHAR_HEIGHT; y++, FontChar += FONT_PTR_DELTA)
    {
        /* Loop each pixel width */
        ULONG x = Left;
 
        for (UCHAR bit = 1 << (BOOTCHAR_WIDTH - 1); bit > 0; bit >>= 1, x++)
        {
            /* Check if we should draw this pixel */
            if (*FontChar & bit)
            {
                /* We do, use the given Text Color */
                SetPixel(x, y, (UCHAR)TextColor);
            }
            else if (BackColor < BV_COLOR_NONE)
            {
                /*
                 * This is a background pixel. We're drawing it
                 * unless it's transparent.
                 */
                SetPixel(x, y, (UCHAR)BackColor);
            }
        }
    }
}

Referenced by VidDisplayString(), and VidDisplayStringXY().

◆ DoScroll()

VOID NTAPI DoScroll ( _In_ ULONG Scroll )

Definition at line 325 of file bootvid.c.

{
    ULONG RowSize = VidpScrollRegion[2] - VidpScrollRegion[0] + 1;
 
    /* Calculate the position in memory for the row */
    PUCHAR OldPosition = BackBuffer + BB_OFFSET(VidpScrollRegion[0], VidpScrollRegion[1] + Scroll);
    PUCHAR NewPosition = BackBuffer + BB_OFFSET(VidpScrollRegion[0], VidpScrollRegion[1]);
 
    /* Start loop */
    for (ULONG Top = VidpScrollRegion[1]; Top <= VidpScrollRegion[3]; ++Top)
    {
        ULONG i;
 
        /* Scroll the row */
        RtlCopyMemory(NewPosition, OldPosition, RowSize);
 
        PULONG Frame = (PULONG)(FrameBufferStart + FB_OFFSET(VidpScrollRegion[0], Top));
 
        for (i = 0; i < RowSize; ++i)
            Frame[i] = CachedPalette[NewPosition[i]];
 
        OldPosition += SCREEN_WIDTH;
        NewPosition += SCREEN_WIDTH;
    }
}

Referenced by VidDisplayString().

◆ InitPaletteWithTable()

VOID NTAPI InitPaletteWithTable	(	_In_ PULONG	Table,
		_In_ ULONG	Count
	)

Definition at line 244 of file bootvid.c.

{
    PULONG Entry = Table;
 
    for (ULONG i = 0; i < Count; i++, Entry++)
    {
        CachedPalette[i] = *Entry | 0xFF000000;
    }
    ApplyPalette();
}

Referenced by VidBitBlt().

◆ NvGetBytesPerPixel()

static UCHAR NvGetBytesPerPixel	(	ULONG	Base,
		ULONG	ScreenWidth
	)

static

Definition at line 36 of file bootvid.c.

{
    /* Get BPP directly from NV2A CRTC (magic constants are from Cromwell) */
    UCHAR BytesPerPixel = 8 * (((NvGetCrtc(Base, 0x19) & 0xE0) << 3) | (NvGetCrtc(Base, 0x13) & 0xFF)) / ScreenWidth;
 
    if (BytesPerPixel == 4)
    {
        ASSERT((NvGetCrtc(Base, 0x28) & 0xF) == BytesPerPixel - 1);
    }
    else
    {
        ASSERT((NvGetCrtc(Base, 0x28) & 0xF) == BytesPerPixel);
    }
 
    return BytesPerPixel;
}

Referenced by VidInitialize().

◆ NvGetCrtc()

static UCHAR NvGetCrtc	(	ULONG	Base,
		UCHAR	Index
	)

static

Definition at line 27 of file bootvid.c.

{
    WRITE_REGISTER_UCHAR((PUCHAR)(Base + NV2A_CRTC_REGISTER_INDEX), Index);
    return READ_REGISTER_UCHAR((PUCHAR)(Base + NV2A_CRTC_REGISTER_VALUE));
}

Referenced by NvGetBytesPerPixel().

◆ PrepareForSetPixel()

VOID PrepareForSetPixel ( VOID )

Definition at line 258 of file bootvid.c.

{
    /* Nothing to prepare */
    NOTHING;
}

Referenced by BitBlt(), and RleBitBlt().

◆ PreserveRow()

VOID NTAPI PreserveRow	(	_In_ ULONG	CurrentTop,
		_In_ ULONG	TopDelta,
		_In_ BOOLEAN	Restore
	)

Definition at line 279 of file bootvid.c.

{
    PUCHAR NewPosition, OldPosition;
 
    /* Calculate the position in memory for the row */
    if (Restore)
    {
        /* Restore the row by copying back the contents saved off-screen */
        NewPosition = BackBuffer + BB_OFFSET(0, CurrentTop);
        OldPosition = BackBuffer + BB_OFFSET(0, SCREEN_HEIGHT);
    }
    else
    {
        /* Preserve the row by saving its contents off-screen */
        NewPosition = BackBuffer + BB_OFFSET(0, SCREEN_HEIGHT);
        OldPosition = BackBuffer + BB_OFFSET(0, CurrentTop);
    }
 
    /* Set the count and loop every pixel of backbuffer */
    ULONG Count = TopDelta * SCREEN_WIDTH;
 
    RtlCopyMemory(NewPosition, OldPosition, Count);
 
    if (Restore)
    {
        NewPosition = BackBuffer + BB_OFFSET(0, CurrentTop);
 
        /* Set the count and loop every pixel of framebuffer */
        for (ULONG y = 0; y < TopDelta; y++)
        {
            PULONG Frame = (PULONG)(FrameBufferStart + FB_OFFSET(0, CurrentTop + y));
 
            Count = SCREEN_WIDTH;
            while (Count--)
            {
                *Frame++ = CachedPalette[*NewPosition++];
            }
        }
    }
}

Referenced by VidDisplayString().

◆ SetPixel()

VOID SetPixel	(	_In_ ULONG	Left,
		_In_ ULONG	Top,
		_In_ UCHAR	Color
	)

Definition at line 265 of file bootvid.c.

{
    PUCHAR Back = BackBuffer + BB_OFFSET(Left, Top);
    PULONG Frame = (PULONG)(FrameBufferStart + FB_OFFSET(Left, Top));
 
    *Back = Color;
    *Frame = CachedPalette[Color];
}

◆ VidCleanUp()

VOID NTAPI VidCleanUp ( VOID )

Definition at line 217 of file bootvid.c.

{
    /* Just fill the screen black */
    VidSolidColorFill(0, 0, SCREEN_WIDTH - 1, SCREEN_HEIGHT - 1, BV_COLOR_BLACK);
}

◆ VidInitialize()

BOOLEAN NTAPI VidInitialize ( _In_ BOOLEAN SetMode )

Definition at line 113 of file bootvid.c.

{
    BOOLEAN Result = FALSE;
 
    /* FIXME: Add platform check */
    /* 1. Access PCI device 1:0:0 */
    /* 2. Check if device ID is 10DE:02A0 */
 
    /* FIXME: Get device MMIO ranges from PCI */
    PHYSICAL_ADDRESS PhysControlStart = {.QuadPart = 0xFD000000};
    PHYSICAL_ADDRESS PhysFrameBufferStart = {.QuadPart = 0xF0000000};
    ULONG ControlLength = 16 * 1024 * 1024;
 
    ULONG_PTR ControlStart = (ULONG_PTR)MmMapIoSpace(PhysControlStart, ControlLength, MmNonCached);
    if (!ControlStart)
    {
        DPRINT1("Out of memory!\n");
        return FALSE;
    }
 
    ULONG_PTR FrameBuffer = READ_REGISTER_ULONG((PULONG)(ControlStart + NV2A_CRTC_FRAMEBUFFER_START));
    FrameBufferWidth = READ_REGISTER_ULONG((PULONG)(ControlStart + NV2A_RAMDAC_FP_HVALID_END)) + 1;
    FrameBufferHeight = READ_REGISTER_ULONG((PULONG)(ControlStart + NV2A_RAMDAC_FP_VVALID_END)) + 1;
 
    FrameBuffer &= 0x0FFFFFFF;
    if (FrameBuffer != 0x3C00000 && FrameBuffer != 0x7C00000)
    {
        /* Check framebuffer address (high 4 MB of either 64 or 128 MB RAM) */
        DPRINT1("Non-standard framebuffer address 0x%p\n", FrameBuffer);
    }
    /* Verify that framebuffer address is page-aligned */
    ASSERT(FrameBuffer % PAGE_SIZE == 0);
 
    if (FrameBufferWidth < SCREEN_WIDTH || FrameBufferHeight < SCREEN_HEIGHT)
    {
        DPRINT1("Unsupported screen resolution!\n");
        goto cleanup;
    }
 
    BytesPerPixel = NvGetBytesPerPixel(ControlStart, FrameBufferWidth);
    ASSERT(BytesPerPixel >= 1 && BytesPerPixel <= 4);
 
    if (BytesPerPixel != 4)
    {
        DPRINT1("Unsupported BytesPerPixel = %d\n", BytesPerPixel);
        goto cleanup;
    }
 
    /* Calculate panning values */
    PanH = (FrameBufferWidth - SCREEN_WIDTH) / 2;
    PanV = (FrameBufferHeight - SCREEN_HEIGHT) / 2;
 
    /* Verify that screen fits framebuffer size */
    ULONG FrameBufferSize = FrameBufferWidth * FrameBufferHeight * BytesPerPixel;
 
    /* FIXME: obtain fb size from firmware somehow (Cromwell reserves high 4 MB of RAM) */
    if (FrameBufferSize > NV2A_VIDEO_MEMORY_SIZE)
    {
        DPRINT1("Current screen resolution exceeds video memory bounds!\n");
        goto cleanup;
    }
 
    /*
     * Reserve off-screen area for the backbuffer that contains 8-bit indexed
     * color screen image, plus preserved row data.
     */
    ULONG BackBufferSize = SCREEN_WIDTH * (SCREEN_HEIGHT + BOOTCHAR_HEIGHT + 1);
 
    /* Make sure there is enough video memory for backbuffer */
    if (NV2A_VIDEO_MEMORY_SIZE - FrameBufferSize < BackBufferSize)
    {
        DPRINT1("Out of memory!\n");
        goto cleanup;
    }
 
    /* Return the address back to GPU memory mapped I/O */
    PhysFrameBufferStart.QuadPart += FrameBuffer;
    FrameBufferStart = (ULONG_PTR)MmMapIoSpace(PhysFrameBufferStart, NV2A_VIDEO_MEMORY_SIZE, MmNonCached);
    if (!FrameBufferStart)
    {
        DPRINT1("Out of memory!\n");
        goto cleanup;
    }
 
    Result = TRUE;
 
    /* Place backbuffer in the hidden part of framebuffer */
    BackBuffer = (PUCHAR)(FrameBufferStart + NV2A_VIDEO_MEMORY_SIZE - BackBufferSize);
 
    /* Now check if we have to set the mode */
    if (SetMode)
        VidResetDisplay(TRUE);
 
cleanup:
    if (ControlStart)
        MmUnmapIoSpace((PVOID)ControlStart, ControlLength);
 
    /* Video is ready */
    return Result;
}

◆ VidResetDisplay()

VOID NTAPI VidResetDisplay ( _In_ BOOLEAN HalReset )

Definition at line 225 of file bootvid.c.

{
    /* Clear the current position */
    VidpCurrentX = 0;
    VidpCurrentY = 0;
 
    /* Clear the screen with HAL if we were asked to */
    if (HalReset)
        HalResetDisplay();
 
    /* Re-initialize the palette and fill the screen black */
    RtlZeroMemory((PULONG)FrameBufferStart, NV2A_VIDEO_MEMORY_SIZE);
    InitializePalette();
    VidSolidColorFill(0, 0, SCREEN_WIDTH - 1, SCREEN_HEIGHT - 1, BV_COLOR_BLACK);
}

◆ VidScreenToBufferBlt()

VOID NTAPI VidScreenToBufferBlt	(	_Out_writes_bytes_(Delta *Height) PUCHAR	Buffer,
		_In_ ULONG	Left,
		_In_ ULONG	Top,
		_In_ ULONG	Width,
		_In_ ULONG	Height,
		_In_ ULONG	Delta
	)

Definition at line 416 of file bootvid.c.

{
    /* Clear the destination buffer */
    RtlZeroMemory(Buffer, Delta * Height);
 
    /* Start the outer Y height loop */
    for (ULONG y = 0; y < Height; y++)
    {
        /* Set current scanline */
        PUCHAR Back = BackBuffer + BB_OFFSET(Left, Top + y);
        PUCHAR Buf = Buffer + y * Delta;
 
        /* Start the X inner loop */
        for (ULONG x = 0; x < Width; x += sizeof(USHORT))
        {
            /* Read the current value */
            *Buf = (*Back++ & 0xF) << 4;
            *Buf |= *Back++ & 0xF;
            Buf++;
        }
    }
}

◆ VidSolidColorFill()

VOID NTAPI VidSolidColorFill	(	_In_ ULONG	Left,
		_In_ ULONG	Top,
		_In_ ULONG	Right,
		_In_ ULONG	Bottom,
		_In_ UCHAR	Color
	)

Definition at line 392 of file bootvid.c.

{
    while (Top <= Bottom)
    {
        PUCHAR Back = BackBuffer + BB_OFFSET(Left, Top);
        PULONG Frame = (PULONG)(FrameBufferStart + FB_OFFSET(Left, Top));
        ULONG L = Left;
 
        while (L++ <= Right)
        {
            *Back++ = Color;
            *Frame++ = CachedPalette[Color];
        }
        Top++;
    }
}