arm.h

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#pragma once

extern PUSHORT VgaArmBase;

#define LCDTIMING0_PPL(x)       ((((x) / 16 - 1) & 0x3f) << 2)
#define LCDTIMING1_LPP(x)       (((x) & 0x3ff) - 1)
#define LCDCONTROL_LCDPWR       (1 << 11)
#define LCDCONTROL_LCDEN        (1)
#define LCDCONTROL_LCDBPP(x)    (((x) & 7) << 1)
#define LCDCONTROL_LCDTFT       (1 << 5)

#define PL110_LCDTIMING0    (PVOID)0xE0020000
#define PL110_LCDTIMING1    (PVOID)0xE0020004
#define PL110_LCDTIMING2    (PVOID)0xE0020008
#define PL110_LCDUPBASE     (PVOID)0xE0020010
#define PL110_LCDLPBASE     (PVOID)0xE0020014
#define PL110_LCDCONTROL    (PVOID)0xE0020018

#define READ_REGISTER_ULONG(r) (*(volatile ULONG * const)(r))
#define WRITE_REGISTER_ULONG(r, v) (*(volatile ULONG *)(r) = (v))

#define READ_REGISTER_USHORT(r) (*(volatile USHORT * const)(r))
#define WRITE_REGISTER_USHORT(r, v) (*(volatile USHORT *)(r) = (v))

FORCEINLINE
USHORT
VidpBuildColor(
    _In_ UCHAR Color)
{
    UCHAR Red, Green, Blue;

    /* Extract color components */
    Red   = GetRValue(DefaultPalette[Color]) >> 3;
    Green = GetGValue(DefaultPalette[Color]) >> 3;
    Blue  = GetBValue(DefaultPalette[Color]) >> 3;

    /* Build the 16-bit color mask */
    return ((Red & 0x1F) << 11) | ((Green & 0x1F) << 6) | ((Blue & 0x1F));
}

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

FORCEINLINE
VOID
SetPixel(
    _In_ ULONG Left,
    _In_ ULONG Top,
    _In_ UCHAR Color)
{
    PUSHORT PixelPosition;

    /* Calculate the pixel position */
    PixelPosition = &VgaArmBase[Left + (Top * SCREEN_WIDTH)];

    /* Set our color */
    WRITE_REGISTER_USHORT(PixelPosition, VidpBuildColor(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);