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Initialize framebuffer device based on a system resource provided by boot loader
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This commit is contained in:
Rafal Kupiec 2024-05-17 22:37:42 +02:00
parent 8a15d46198
commit 41bc673694
Signed by: belliash
GPG Key ID: 4E829243E0CFE6B4
1 changed files with 35 additions and 21 deletions
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56
xtoskrnl/hl/fbdev.c
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@ -101,6 +101,10 @@ XTAPI
XTSTATUS XTSTATUS
HlInitializeFrameBuffer(VOID) HlInitializeFrameBuffer(VOID)
{ {
PSYSTEM_RESOURCE_FRAMEBUFFER FrameBufferResource;
PSYSTEM_RESOURCE_HEADER SystemResource;
XTSTATUS Status;
/* Check if display already initialized */ /* Check if display already initialized */
if(HlpFrameBufferData.Initialized) if(HlpFrameBufferData.Initialized)
{ {
@ -108,19 +112,29 @@ HlInitializeFrameBuffer(VOID)
return STATUS_SUCCESS; return STATUS_SUCCESS;
} }
/* Check if framebuffer initialized by bootloader */ /* Get FrameBuffer system resource */
if(!KeInitializationBlock->LoaderInformation.FrameBuffer.Initialized || Status = KeGetSystemResource(SystemResourceFrameBuffer, &SystemResource);
!KeInitializationBlock->LoaderInformation.FrameBuffer.Address) if(Status != STATUS_SUCCESS)
{ {
/* Display not initialized */ /* Resource not found */
return STATUS_NOT_FOUND;
}
/* Cast system resource to FrameBuffer resource */
FrameBufferResource = (PSYSTEM_RESOURCE_FRAMEBUFFER)SystemResource;
/* Check if bootloader provided a framebuffer address */
if(!FrameBufferResource->Header.VirtualAddress)
{
/* Display probably not initialized */
return STATUS_DEVICE_NOT_READY; return STATUS_DEVICE_NOT_READY;
} }
/* Check if custom font provided by bootloader */ /* Check if bootloader provided a custom font */
if(KeInitializationBlock->LoaderInformation.FrameBuffer.Font) if(FrameBufferResource->Font)
{ {
/* Use custom font */ /* Use custom font */
HlpFrameBufferData.Font = KeInitializationBlock->LoaderInformation.FrameBuffer.Font; HlpFrameBufferData.Font = FrameBufferResource->Font;
} }
else else
{ {
@ -129,20 +143,20 @@ HlInitializeFrameBuffer(VOID)
} }
/* Save framebuffer information and mark display as initialized */ /* Save framebuffer information and mark display as initialized */
HlpFrameBufferData.Address = KeInitializationBlock->LoaderInformation.FrameBuffer.Address; HlpFrameBufferData.Address = FrameBufferResource->Header.VirtualAddress;
HlpFrameBufferData.Width = KeInitializationBlock->LoaderInformation.FrameBuffer.Width; HlpFrameBufferData.Width = FrameBufferResource->Width;
HlpFrameBufferData.Height = KeInitializationBlock->LoaderInformation.FrameBuffer.Height; HlpFrameBufferData.Height = FrameBufferResource->Height;
HlpFrameBufferData.BitsPerPixel = KeInitializationBlock->LoaderInformation.FrameBuffer.BitsPerPixel; HlpFrameBufferData.BitsPerPixel = FrameBufferResource->BitsPerPixel;
HlpFrameBufferData.PixelsPerScanLine = KeInitializationBlock->LoaderInformation.FrameBuffer.PixelsPerScanLine; HlpFrameBufferData.PixelsPerScanLine = FrameBufferResource->PixelsPerScanLine;
HlpFrameBufferData.Pitch = KeInitializationBlock->LoaderInformation.FrameBuffer.Pitch; HlpFrameBufferData.Pitch = FrameBufferResource->Pitch;
HlpFrameBufferData.Pixels.BlueShift = KeInitializationBlock->LoaderInformation.FrameBuffer.Pixels.BlueShift; HlpFrameBufferData.Pixels.BlueShift = FrameBufferResource->Pixels.BlueShift;
HlpFrameBufferData.Pixels.BlueSize = KeInitializationBlock->LoaderInformation.FrameBuffer.Pixels.BlueSize; HlpFrameBufferData.Pixels.BlueSize = FrameBufferResource->Pixels.BlueSize;
HlpFrameBufferData.Pixels.GreenShift = KeInitializationBlock->LoaderInformation.FrameBuffer.Pixels.GreenShift; HlpFrameBufferData.Pixels.GreenShift = FrameBufferResource->Pixels.GreenShift;
HlpFrameBufferData.Pixels.GreenSize = KeInitializationBlock->LoaderInformation.FrameBuffer.Pixels.GreenSize; HlpFrameBufferData.Pixels.GreenSize = FrameBufferResource->Pixels.GreenSize;
HlpFrameBufferData.Pixels.RedShift = KeInitializationBlock->LoaderInformation.FrameBuffer.Pixels.RedShift; HlpFrameBufferData.Pixels.RedShift = FrameBufferResource->Pixels.RedShift;
HlpFrameBufferData.Pixels.RedSize = KeInitializationBlock->LoaderInformation.FrameBuffer.Pixels.RedSize; HlpFrameBufferData.Pixels.RedSize = FrameBufferResource->Pixels.RedSize;
HlpFrameBufferData.Pixels.ReservedShift = KeInitializationBlock->LoaderInformation.FrameBuffer.Pixels.ReservedShift; HlpFrameBufferData.Pixels.ReservedShift = FrameBufferResource->Pixels.ReservedShift;
HlpFrameBufferData.Pixels.ReservedSize = KeInitializationBlock->LoaderInformation.FrameBuffer.Pixels.ReservedSize; HlpFrameBufferData.Pixels.ReservedSize = FrameBufferResource->Pixels.ReservedSize;
HlpFrameBufferData.Initialized = TRUE; HlpFrameBufferData.Initialized = TRUE;
/* Clear screen */ /* Clear screen */