718 lines
27 KiB
C
718 lines
27 KiB
C
/**
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* PROJECT: ExectOS
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* COPYRIGHT: See COPYING.md in the top level directory
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* FILE: xtldr/modules/framebuf/framebuf.c
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* DESCRIPTION: EFI framebuffer support module for XTLDR
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* DEVELOPERS: Rafal Kupiec <belliash@codingworkshop.eu.org>
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*/
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#include <framebuf.h>
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/* PE/COFF_O module information */
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MODULE_AUTHOR(L"Rafal Kupiec <belliash@codingworkshop.eu.org>");
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MODULE_DESCRIPTION(L"EFI FB (FrameBuffer) support");
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MODULE_LICENSE(L"GPLv3");
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MODULE_VERSION(L"0.2");
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/**
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* Provides an EFI Frame Buffer protocol driver name used for initialization.
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*
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* @param Protocol
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* Supplies a pointer to the memory area where framebuffer driver information will be stored.
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*
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* @return This routine returns a status code.
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*
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* @since XT 1.0
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*/
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XTCDECL
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EFI_STATUS
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FbGetDisplayDriver(OUT PEFI_GRAPHICS_PROTOCOL Protocol)
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{
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/* Check if framebuffer is initialized */
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if(!FbpDisplayInfo.Initialized)
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{
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/* Return error if framebuffer is not initialized */
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return STATUS_EFI_NOT_READY;
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}
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/* Copy framebuffer driver information */
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*Protocol = FbpDisplayInfo.Protocol;
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/* Return success */
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return STATUS_EFI_SUCCESS;
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}
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/**
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* Returns information about EFI Frame Buffer.
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*
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* @param FbInfo
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* Supplies a pointer to the memory area where framebuffer information will be stored.
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*
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* @return This routine returns a status code.
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*
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* @since XT 1.0
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*/
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XTCDECL
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EFI_STATUS
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FbGetDisplayInformation(OUT PEFI_PHYSICAL_ADDRESS FrameBufferBase,
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OUT PULONG_PTR FrameBufferSize,
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OUT PXTBL_FRAMEBUFFER_MODE_INFORMATION ModeInfo)
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{
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/* Check if framebuffer is initialized */
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if(!FbpDisplayInfo.Initialized)
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{
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/* Return error if framebuffer is not initialized */
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return STATUS_EFI_NOT_READY;
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}
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/* Set basic framebuffer information */
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*FrameBufferBase = FbpDisplayInfo.FrameBufferBase;
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*FrameBufferSize = FbpDisplayInfo.FrameBufferSize;
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/* Set framebuffer mode information */
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ModeInfo->Width = FbpDisplayInfo.ModeInfo.Width;
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ModeInfo->Height = FbpDisplayInfo.ModeInfo.Height;
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ModeInfo->Depth = FbpDisplayInfo.ModeInfo.Depth;
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ModeInfo->RefreshRate = FbpDisplayInfo.ModeInfo.RefreshRate;
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ModeInfo->BitsPerPixel = FbpDisplayInfo.ModeInfo.BitsPerPixel;
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ModeInfo->BytesPerPixel = FbpDisplayInfo.ModeInfo.BytesPerPixel;
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ModeInfo->PixelsPerScanLine = FbpDisplayInfo.ModeInfo.PixelsPerScanLine;
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ModeInfo->Pitch = FbpDisplayInfo.ModeInfo.Pitch;
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ModeInfo->PixelFormat = FbpDisplayInfo.ModeInfo.PixelFormat;
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ModeInfo->PixelInformation = FbpDisplayInfo.ModeInfo.PixelInformation;
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/* Return success */
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return STATUS_EFI_SUCCESS;
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}
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/**
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* Initializes FrameBuffer device on GOP and UGA compatible adapters.
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*
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* @return This routine returns a status code.
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*
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* @since XT 1.0
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*/
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XTCDECL
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EFI_STATUS
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FbInitializeDisplay()
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{
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EFI_GUID GopGuid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
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EFI_GUID UgaGuid = EFI_UNIVERSAL_GRAPHICS_ADAPTER_PROTOCOL_GUID;
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PEFI_GRAPHICS_OUTPUT_MODE_INFORMATION GopModeInfo;
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UINT Depth, QueryMode, Refresh;
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ULONG_PTR InfoSize;
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EFI_HANDLE Handle;
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EFI_STATUS Status;
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/* Check if framebuffer already initialized */
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if(!FbpDisplayInfo.Initialized)
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{
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/* Print debug message */
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XtLdrProtocol->Debug.Print(L"Initializing framebuffer device\n");
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/* Attempt to open EFI GOP protocol */
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Status = XtLdrProtocol->Protocol.Open(&Handle, (PVOID*)&FbpDisplayInfo.Driver.Gop, &GopGuid);
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/* Check if Graphics Output Protocol (GOP) is available */
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if(Status == STATUS_EFI_SUCCESS)
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{
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/* Check if there are any video modes available */
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if(FbpDisplayInfo.Driver.Gop->Mode->MaxMode == 0)
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{
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/* No video modes available */
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XtLdrProtocol->Debug.Print(L"ERROR: No GOP video mode available\n");
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return STATUS_EFI_UNSUPPORTED;
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}
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/* Query current graphics mode */
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QueryMode = FbpDisplayInfo.Driver.Gop->Mode == NULL ? 0 : FbpDisplayInfo.Driver.Gop->Mode->Mode;
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Status = FbpDisplayInfo.Driver.Gop->QueryMode(FbpDisplayInfo.Driver.Gop, QueryMode, &InfoSize, &GopModeInfo);
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if(Status == STATUS_EFI_NOT_STARTED)
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{
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/* Set the mode to circumvent buggy UEFI firmware */
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Status = FbpDisplayInfo.Driver.Gop->SetMode(FbpDisplayInfo.Driver.Gop, 0);
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}
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if(Status != STATUS_EFI_SUCCESS)
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{
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/* Unable to query GOP modes */
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XtLdrProtocol->Debug.Print(L"ERROR: Failed to get GOP native mode (Status Code: 0x%zX)\n");
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return STATUS_EFI_UNSUPPORTED;
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}
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/* Store frame buffer base address and protocol used */
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FbpDisplayInfo.FrameBufferBase = FbpDisplayInfo.Driver.Gop->Mode->FrameBufferBase;
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FbpDisplayInfo.DefaultMode = FbpDisplayInfo.Driver.Gop->Mode->Mode;
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FbpDisplayInfo.Protocol = GOP;
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/* Get current mode information */
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Status = FbpGetModeInfo();
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if(Status != STATUS_EFI_SUCCESS)
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{
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/* Unable to get mode information */
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XtLdrProtocol->Debug.Print(L"ERROR: Failed to get GOP mode information (Status Code: 0x%zX)\n");
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return STATUS_EFI_UNSUPPORTED;
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}
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/* Found GOP */
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XtLdrProtocol->Debug.Print(L"Found EFI-GOP compatible display adapter @ %P (%zu bytes)\n",
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FbpDisplayInfo.FrameBufferBase, FbpDisplayInfo.FrameBufferSize);
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/* Close GOP protocol */
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Status = XtLdrProtocol->Protocol.Close(Handle, &GopGuid);
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}
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else
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{
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/* GOP is unavailable, attempt to open UGA protocol */
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Status = XtLdrProtocol->Protocol.Open(&Handle, (PVOID*)&FbpDisplayInfo.Driver.Uga, &UgaGuid);
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/* Check if Universal Graphics Adapter (UGA) is available */
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if(Status == STATUS_EFI_SUCCESS)
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{
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/* Get current video mode */
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Status = FbpDisplayInfo.Driver.Uga->GetMode(FbpDisplayInfo.Driver.Uga, &FbpDisplayInfo.ModeInfo.Width,
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&FbpDisplayInfo.ModeInfo.Height, &Depth, &Refresh);
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if(Status != STATUS_EFI_SUCCESS)
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{
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/* Unable to get current UGA mode */
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XtLdrProtocol->Debug.Print(L"ERROR: Failed to get current UGA mode (Status Code: 0x%zX)\n", Status);
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/* Close UGA protocol and return error */
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XtLdrProtocol->Protocol.Close(Handle, &UgaGuid);
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return STATUS_EFI_DEVICE_ERROR;
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}
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/* Find framebuffer address */
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Status = FbpFindFramebufferAddress(&FbpDisplayInfo.FrameBufferBase);
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if(Status != STATUS_EFI_SUCCESS)
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{
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/* Unable to find framebuffer address */
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XtLdrProtocol->Debug.Print(L"ERROR: Failed to get EFI FB address (Status Code: 0x%zX)\n", Status);
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/* Close UGA protocol and return error */
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XtLdrProtocol->Protocol.Close(Handle, &UgaGuid);
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return STATUS_EFI_DEVICE_ERROR;
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}
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/* Store framebuffer protocol information */
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FbpDisplayInfo.DefaultMode = 0;
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FbpDisplayInfo.Protocol = UGA;
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/* Get mode information */
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Status = FbpGetModeInfo();
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if(Status != STATUS_EFI_SUCCESS)
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{
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/* Unable to get mode information */
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XtLdrProtocol->Debug.Print(L"ERROR: Failed to get UGA mode information (Status Code: 0x%zX)\n");
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return STATUS_EFI_UNSUPPORTED;
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}
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/* Found UGA */
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XtLdrProtocol->Debug.Print(L"Found EFI-UGA compatible display adapter @ %P (%zu bytes)\n",
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FbpDisplayInfo.FrameBufferBase, FbpDisplayInfo.FrameBufferSize);
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/* Close UGA protocol */
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XtLdrProtocol->Protocol.Close(Handle, &UgaGuid);
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}
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}
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/* Make sure framebuffer initialized properly */
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if(FbpDisplayInfo.Protocol == NONE)
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{
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/* GOP and UGA unavailable */
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XtLdrProtocol->Debug.Print(L"WARNING: No display adapter found!\n");
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return STATUS_EFI_NOT_FOUND;
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}
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XtLdrProtocol->Debug.Print(L"Current screen resolution is %ux%ux%u\n", FbpDisplayInfo.ModeInfo.Width,
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FbpDisplayInfo.ModeInfo.Height, FbpDisplayInfo.ModeInfo.BitsPerPixel);
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/* Set framebuffer initialization flag */
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FbpDisplayInfo.Initialized = TRUE;
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}
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/* Return success */
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return STATUS_SUCCESS;
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}
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/**
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* Sets custom screen resolution, based on the provided width and height.
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*
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* @param Width
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* Supplies the width of the screen.
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*
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* @param Height
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* Supplies the height of the screen.
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*
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* @return This routine returns a status code.
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*
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* @since XT 1.0
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*/
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XTCDECL
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EFI_STATUS
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FbSetScreenResolution(IN UINT Width,
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IN UINT Height)
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{
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PEFI_GRAPHICS_OUTPUT_MODE_INFORMATION ModeInfo;
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BOOLEAN ModeChanged;
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EFI_STATUS Status;
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UINT_PTR Size;
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UINT Mode;
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/* Check if framebuffer is initialized */
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if(!FbpDisplayInfo.Initialized)
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{
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/* Framebuffer not ready to change screen mode */
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return STATUS_EFI_NOT_READY;
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}
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ModeChanged = FALSE;
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/* Change screen mode depending on display adapter protocol */
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switch(FbpDisplayInfo.Protocol)
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{
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case GOP:
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/* GOP available, check if user specified screen resolution */
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if(Width == 0 || Height == 0)
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{
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/* No resolution specified, temporarily set lowest supported screen resolution */
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Status = FbpDisplayInfo.Driver.Gop->SetMode(FbpDisplayInfo.Driver.Gop, 1);
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if(Status == STATUS_EFI_SUCCESS)
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{
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/* Restore default graphics mode */
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Status = FbpDisplayInfo.Driver.Gop->SetMode(FbpDisplayInfo.Driver.Gop, FbpDisplayInfo.DefaultMode);
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ModeChanged = (Status == STATUS_EFI_SUCCESS);
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}
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}
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else
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{
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/* User specified screen resolution, find a corresponding mode */
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Mode = 1;
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while(Mode <= FbpDisplayInfo.Driver.Gop->Mode->MaxMode)
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{
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/* Get mode information */
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Status = FbpDisplayInfo.Driver.Gop->QueryMode(FbpDisplayInfo.Driver.Gop, Mode, &Size, &ModeInfo);
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if(Status == STATUS_EFI_SUCCESS && Size >= sizeof(*ModeInfo) && ModeInfo != NULL)
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{
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/* Check if match found */
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if(ModeInfo->HorizontalResolution == Width && ModeInfo->VerticalResolution == Height)
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{
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/* Found corresponding mode, attempt to set it */
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Status = FbpDisplayInfo.Driver.Gop->SetMode(FbpDisplayInfo.Driver.Gop, Mode);
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if(Status == STATUS_EFI_SUCCESS)
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{
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/* New mode set correctly, use it */
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ModeChanged = TRUE;
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break;
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}
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}
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}
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/* Try with next mode */
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Mode++;
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}
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}
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break;
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case UGA:
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/* Set UGA screen mode, trying to keep current color depth and refresh rate */
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Status = FbpDisplayInfo.Driver.Uga->SetMode(FbpDisplayInfo.Driver.Uga, Width, Height,
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FbpDisplayInfo.ModeInfo.Depth,
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FbpDisplayInfo.ModeInfo.RefreshRate);
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if(Status == STATUS_EFI_SUCCESS)
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{
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/* New mode set correctly, use it */
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ModeChanged = TRUE;
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}
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break;
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default:
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/* This should never be reached */
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break;
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}
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if(!ModeChanged)
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{
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/* Failed to change screen mode */
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XtLdrProtocol->Debug.Print(L"ERROR: Failed to change screen mode to %ux%u (Status Code: 0x%zX)\n",
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Width, Height, Status);
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return STATUS_EFI_UNSUPPORTED;
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}
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/* Get new screen mode information */
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Status = FbpGetModeInfo();
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if(Status == STATUS_EFI_SUCCESS)
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{
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XtLdrProtocol->Debug.Print(L"Changed screen resolution to %ux%ux%u\n", FbpDisplayInfo.ModeInfo.Width,
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FbpDisplayInfo.ModeInfo.Height, FbpDisplayInfo.ModeInfo.BitsPerPixel);
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}
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/* Return success */
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return STATUS_EFI_SUCCESS;
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}
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/**
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* Finds a PCI Display Adapter and returns its framebuffer address.
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*
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* @param Address
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* Supplies a pointer to the memory area where framebuffer address will be stored.
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*
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* @return This routine returns a status code.
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*
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* @since XT 1.0
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*/
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XTCDECL
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EFI_STATUS
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FbpFindFramebufferAddress(OUT PEFI_PHYSICAL_ADDRESS Address)
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{
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EFI_GUID PciIoGuid = EFI_PCI_IO_PROTOCOL_GUID;
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PEFI_ACPI_ADDRESS_SPACE_DESCRIPTOR BarInfo;
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PEFI_PCI_IO_PROTOCOL IoProtocol;
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ULONGLONG FramebufAddressLength;
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PCI_TYPE0_DEVICE PciDevice;
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PVOID FramebufAddress;
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UINT_PTR HandlesCount;
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EFI_HANDLE *Handles;
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EFI_STATUS Status;
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UINT Index;
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/* Initialize variables */
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FramebufAddressLength = 0;
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Handles = NULL;
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/* Locate EFI_PCI_IO_PROTOCOL handles */
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Status = XtLdrProtocol->Protocol.LocateHandles(&Handles, &HandlesCount, &PciIoGuid);
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if(Status != STATUS_EFI_SUCCESS)
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{
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/* Failed to get handles, return error code */
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XtLdrProtocol->Debug.Print(L"ERROR: Failed to get handles (Status Code: 0x%zX)\n", Status);
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return Status;
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}
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/* Iterate through handles */
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for(Index = 0; Index < HandlesCount; Index++)
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{
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/* Open EFI_PCI_IO_PROTOCOL handle */
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Status = XtLdrProtocol->Protocol.OpenHandle(Handles[Index], (PVOID *)&IoProtocol, &PciIoGuid);
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if(Status != STATUS_EFI_SUCCESS)
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{
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/* Failed to open protocol, continue with next handle */
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XtLdrProtocol->Debug.Print(L"ERROR: Failed to open protocol (Status Code: 0x%zX)\n", Status);
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continue;
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}
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/* Read PCI controller registers from PCI configuration space */
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Status = IoProtocol->Pci.Read(IoProtocol, EfiPciIoWidthUint32, 0, sizeof(PciDevice) / sizeof(UINT), &PciDevice);
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if(Status != STATUS_EFI_SUCCESS)
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{
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/* Failed to read PCI device class */
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XtLdrProtocol->Debug.Print(L"ERROR: Failed to read class (Status Code: 0x%zX)\n", Status);
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/* Close protocol and continue with next handle */
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XtLdrProtocol->Protocol.Close(Handles[Index], &PciIoGuid);
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continue;
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}
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/* Check if device is a graphics adapter */
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if(PciDevice.Hdr.ClassCode[2] != 0x03)
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{
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/* Not a graphics adapter, close protocol and continue with next handle */
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XtLdrProtocol->Protocol.Close(Handles[Index], &PciIoGuid);
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continue;
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}
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/* Iterate through all PCI device's Base Address Registers (BARs) */
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for(UINT Bars = 0; Bars < 6; Bars++)
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{
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/* Get BAR attributes */
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Status = IoProtocol->GetBarAttributes(IoProtocol, Bars, NULL, (VOID **)&BarInfo);
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if(Status != STATUS_EFI_SUCCESS)
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{
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/* Failed to get BAR attributes, continue with next BAR */
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continue;
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}
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/* Check if this BAR is 'Memory Range' of 'ACPI QWORD Address Space' */
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if(BarInfo->SpaceDescriptor == EFI_ACPI_ADDRESS64_SPACE_DESCRIPTOR &&
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BarInfo->ResourceType == EFI_ACPI_ADDRESS_SPACE_TYPE_MEMORY)
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{
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/* Check if this BAR is the biggest we've seen so far */
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if(BarInfo->AddressLength > FramebufAddressLength)
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{
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/* The biggest BAR should be the framebuffer; save its address and length */
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FramebufAddress = (PVOID)(ULONG_PTR)(BarInfo->AddressRangeMin << 16);
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FramebufAddressLength = BarInfo->AddressLength;
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}
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}
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}
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/* Close handle and continue with next one */
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XtLdrProtocol->Protocol.Close(Handles[Index], &PciIoGuid);
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}
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/* Set framebuffer address and return success */
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*Address = (EFI_PHYSICAL_ADDRESS)FramebufAddress;
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return STATUS_EFI_SUCCESS;
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}
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/**
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* Calculates color mask and shift based upon pixel bit mask.
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*
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* @param PixelBitMask
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* Provides a pixel bit mask.
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*
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* @param ColorMask
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* Supplies a pointer to the memory area where the color mask will be stored.
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*
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* @param ColorShift
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* Supplies a pointer to the memory area where the color shift (position) will be stored.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTCDECL
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VOID
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FbpGetColorMask(IN UINT PixelBitMask,
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OUT PUSHORT ColorMask,
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OUT PUSHORT ColorShift)
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{
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UINT Index, Mask;
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/* Initialize variables */
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Index = 0;
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Mask = 1;
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/* Make sure EfiMask is not zero */
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if(PixelBitMask)
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{
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while((Index < 32) && ((PixelBitMask & Mask) == 0))
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{
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Index++;
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Mask <<= 1;
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}
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/* Set color mask and shift */
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*ColorShift = Index;
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*ColorMask = (Mask >> Index);
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}
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else
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{
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/* Set default color mask and shift */
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*ColorMask = 0;
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*ColorShift = 0;
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}
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}
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/**
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* Gets information about the current display mode and stores it in internal structure.
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*
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* @return This routine returns a status code.
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*
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* @since XT 1.0
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*/
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XTCDECL
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EFI_STATUS
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FbpGetModeInfo()
|
|
{
|
|
PEFI_GRAPHICS_OUTPUT_MODE_INFORMATION ModeInfo;
|
|
EFI_PIXEL_BITMASK PixelBitMask;
|
|
XTSTATUS Status;
|
|
UINT_PTR Size;
|
|
|
|
switch(FbpDisplayInfo.Protocol)
|
|
{
|
|
case GOP:
|
|
/* Query GOP mode information */
|
|
Status = FbpDisplayInfo.Driver.Gop->QueryMode(FbpDisplayInfo.Driver.Gop,
|
|
FbpDisplayInfo.Driver.Gop->Mode->Mode,
|
|
&Size, &ModeInfo);
|
|
if(Status != STATUS_EFI_SUCCESS)
|
|
{
|
|
/* Failed to get GOP mode information, return error */
|
|
return Status;
|
|
}
|
|
|
|
/* Get pixel bit mask information */
|
|
FbpGetPixelInformation(&FbpDisplayInfo.Driver.Gop->Mode->Info->PixelInformation);
|
|
|
|
/* Store GOP framebuffer information */
|
|
FbpDisplayInfo.ModeInfo.Width = FbpDisplayInfo.Driver.Gop->Mode->Info->HorizontalResolution;
|
|
FbpDisplayInfo.ModeInfo.Height = FbpDisplayInfo.Driver.Gop->Mode->Info->VerticalResolution;
|
|
FbpDisplayInfo.ModeInfo.Depth = FbpDisplayInfo.ModeInfo.BitsPerPixel;
|
|
FbpDisplayInfo.ModeInfo.PixelsPerScanLine = FbpDisplayInfo.Driver.Gop->Mode->Info->PixelsPerScanLine;
|
|
FbpDisplayInfo.ModeInfo.Pitch = FbpDisplayInfo.ModeInfo.PixelsPerScanLine *
|
|
(FbpDisplayInfo.ModeInfo.BitsPerPixel / 8);
|
|
FbpDisplayInfo.ModeInfo.RefreshRate = 0;
|
|
|
|
/* Store pixel format information and frame buffer size */
|
|
FbpDisplayInfo.ModeInfo.PixelFormat = FbpDisplayInfo.Driver.Gop->Mode->Info->PixelFormat;
|
|
FbpDisplayInfo.FrameBufferSize = FbpDisplayInfo.Driver.Gop->Mode->FrameBufferSize;
|
|
break;
|
|
case UGA:
|
|
/* Query UGA mode information */
|
|
Status = FbpDisplayInfo.Driver.Uga->GetMode(FbpDisplayInfo.Driver.Uga, &FbpDisplayInfo.ModeInfo.Width,
|
|
&FbpDisplayInfo.ModeInfo.Height, &FbpDisplayInfo.ModeInfo.Depth,
|
|
&FbpDisplayInfo.ModeInfo.RefreshRate);
|
|
if(Status != STATUS_EFI_SUCCESS)
|
|
{
|
|
/* Failed to get UGA mode information, return error */
|
|
return Status;
|
|
}
|
|
|
|
/* Get pixel bit mask information */
|
|
PixelBitMask = (EFI_PIXEL_BITMASK){0, 0, 0, 0};
|
|
FbpGetPixelInformation(&PixelBitMask);
|
|
|
|
/* Store UGA framebuffer information */
|
|
FbpDisplayInfo.ModeInfo.PixelsPerScanLine = FbpDisplayInfo.ModeInfo.Width;
|
|
FbpDisplayInfo.ModeInfo.Pitch = FbpDisplayInfo.ModeInfo.PixelsPerScanLine *
|
|
(FbpDisplayInfo.ModeInfo.BitsPerPixel / 8);
|
|
|
|
/* Store pixel format information and recalculate frame buffer size */
|
|
FbpDisplayInfo.ModeInfo.PixelFormat = PixelBlueGreenRedReserved8BitPerColor;
|
|
FbpDisplayInfo.FrameBufferSize = FbpDisplayInfo.ModeInfo.Width *
|
|
FbpDisplayInfo.ModeInfo.Height *
|
|
FbpDisplayInfo.ModeInfo.BytesPerPixel + 1024;
|
|
break;
|
|
default:
|
|
/* This should never be reached as no other display driver is supported */
|
|
break;
|
|
}
|
|
|
|
/* Return success */
|
|
return STATUS_EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* Gets pixel information based on the reported pixel format.
|
|
*
|
|
* @param FrameBufferInfo
|
|
* Supplies a pointer to the framebuffer information structure.
|
|
*
|
|
* @param PixelsBitMask
|
|
* Supplies a pointer to the pixel bit mask information provided by EFI graphics protocol.
|
|
*
|
|
* @return This routine does not return any value.
|
|
*
|
|
* @since XT 1.0
|
|
*/
|
|
XTCDECL
|
|
VOID
|
|
FbpGetPixelInformation(IN PEFI_PIXEL_BITMASK PixelsBitMask)
|
|
{
|
|
UINT CompoundMask;
|
|
|
|
/* Check reported pixel format */
|
|
switch(FbpDisplayInfo.ModeInfo.PixelFormat)
|
|
{
|
|
case PixelBlueGreenRedReserved8BitPerColor:
|
|
/* BGRR, 32 bits per pixel */
|
|
FbpDisplayInfo.ModeInfo.BitsPerPixel = 32;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.BlueMask = 0xFF;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.BlueShift = 0;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.GreenMask = 0xFF;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.GreenShift = 8;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.RedMask = 0xFF;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.RedShift = 16;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.ReservedMask = 0xFF;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.ReservedShift = 24;
|
|
break;
|
|
case PixelRedGreenBlueReserved8BitPerColor:
|
|
/* RGBR, 32 bits per pixel */
|
|
FbpDisplayInfo.ModeInfo.BitsPerPixel = 32;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.BlueMask = 0xFF;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.BlueShift = 16;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.GreenMask = 0xFF;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.GreenShift = 8;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.RedMask = 0xFF;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.RedShift = 0;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.ReservedMask = 0xFF;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.ReservedShift = 24;
|
|
break;
|
|
case PixelBitMask:
|
|
/* Assume 32 bits per pixel */
|
|
FbpDisplayInfo.ModeInfo.BitsPerPixel = 32;
|
|
|
|
/* Calculate compound mask */
|
|
CompoundMask = PixelsBitMask->RedMask |
|
|
PixelsBitMask->GreenMask |
|
|
PixelsBitMask->BlueMask |
|
|
PixelsBitMask->ReservedMask;
|
|
|
|
/* Recalculate bits per pixel */
|
|
while((CompoundMask & (1 << 31)) == 0)
|
|
{
|
|
FbpDisplayInfo.ModeInfo.BitsPerPixel--;
|
|
CompoundMask <<= 1;
|
|
}
|
|
|
|
/* Set pixel information */
|
|
FbpGetColorMask(PixelsBitMask->RedMask, &FbpDisplayInfo.ModeInfo.PixelInformation.RedMask,
|
|
&FbpDisplayInfo.ModeInfo.PixelInformation.RedShift);
|
|
FbpGetColorMask(PixelsBitMask->GreenMask, &FbpDisplayInfo.ModeInfo.PixelInformation.GreenMask,
|
|
&FbpDisplayInfo.ModeInfo.PixelInformation.GreenShift);
|
|
FbpGetColorMask(PixelsBitMask->BlueMask, &FbpDisplayInfo.ModeInfo.PixelInformation.BlueMask,
|
|
&FbpDisplayInfo.ModeInfo.PixelInformation.BlueShift);
|
|
FbpGetColorMask(PixelsBitMask->ReservedMask, &FbpDisplayInfo.ModeInfo.PixelInformation.ReservedMask,
|
|
&FbpDisplayInfo.ModeInfo.PixelInformation.ReservedShift);
|
|
break;
|
|
default:
|
|
/* Unknown pixel format */
|
|
FbpDisplayInfo.ModeInfo.BitsPerPixel = 0;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.BlueMask = 0x0;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.BlueShift = 0;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.GreenMask = 0x0;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.GreenShift = 0;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.RedMask = 0x0;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.RedShift = 0;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.ReservedMask = 0x0;
|
|
FbpDisplayInfo.ModeInfo.PixelInformation.ReservedShift = 0;
|
|
break;
|
|
}
|
|
|
|
/* Calculate bytes per pixel based on bits per pixel */
|
|
FbpDisplayInfo.ModeInfo.BytesPerPixel = FbpDisplayInfo.ModeInfo.BitsPerPixel >> 3;
|
|
}
|
|
|
|
/**
|
|
* This routine is the entry point of the XT EFI boot loader module.
|
|
*
|
|
* @param ImageHandle
|
|
* Firmware-allocated handle that identifies the image.
|
|
*
|
|
* @param SystemTable
|
|
* Provides the EFI system table.
|
|
*
|
|
* @return This routine returns status code.
|
|
*
|
|
* @since XT 1.0
|
|
*/
|
|
XTCDECL
|
|
EFI_STATUS
|
|
XtLdrModuleMain(IN EFI_HANDLE ImageHandle,
|
|
IN PEFI_SYSTEM_TABLE SystemTable)
|
|
{
|
|
EFI_GUID Guid = XT_FRAMEBUFFER_PROTOCOL_GUID;
|
|
EFI_STATUS Status;
|
|
|
|
/* Open the XTLDR protocol */
|
|
Status = BlGetXtLdrProtocol(SystemTable, ImageHandle, &XtLdrProtocol);
|
|
if(Status != STATUS_EFI_SUCCESS)
|
|
{
|
|
/* Failed to open loader protocol */
|
|
return STATUS_EFI_PROTOCOL_ERROR;
|
|
}
|
|
|
|
/* Set initial framebuffer state */
|
|
FbpDisplayInfo.Protocol = NONE;
|
|
FbpDisplayInfo.Initialized = FALSE;
|
|
|
|
/* Set routines available via XTLDR framebuffer protocol */
|
|
FbpFrameBufferProtocol.GetDisplayDriver = FbGetDisplayDriver;
|
|
FbpFrameBufferProtocol.GetDisplayInformation = FbGetDisplayInformation;
|
|
FbpFrameBufferProtocol.Initialize = FbInitializeDisplay;
|
|
FbpFrameBufferProtocol.SetScreenResolution = FbSetScreenResolution;
|
|
|
|
/* Register XTOS boot protocol */
|
|
return XtLdrProtocol->Protocol.Install(&FbpFrameBufferProtocol, &Guid);
|
|
}
|