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audk/IntelFrameworkModulePkg/Csm/BiosThunk/VideoDxe/BiosVideo.c
Hao Wu aa5f60ae41 IntelFrameworkModulePkg: Refine casting expression result to bigger size 
There are cases that the operands of an expression are all with rank less
than UINT64/INT64 and the result of the expression is explicitly cast to
UINT64/INT64 to fit the target size.

An example will be:
UINT32 a,b;
// a and b can be any unsigned int type with rank less than UINT64, like
// UINT8, UINT16, etc.
UINT64 c;
c = (UINT64) (a + b);

Some static code checkers may warn that the expression result might
overflow within the rank of "int" (integer promotions) and the result is
then cast to a bigger size.

The commit refines codes by the following rules:
1). When the expression is possible to overflow the range of unsigned int/
int:
c = (UINT64)a + b;

2). When the expression will not overflow within the rank of "int", remove
the explicit type casts:
c = a + b;

3). When the expression will be cast to pointer of possible greater size:
UINT32 a,b;
VOID *c;
c = (VOID *)(UINTN)(a + b); --> c = (VOID *)((UINTN)a + b);

4). When one side of a comparison expression contains only operands with
rank less than UINT32:
UINT8 a;
UINT16 b;
UINTN c;
if ((UINTN)(a + b) > c) {...} --> if (((UINT32)a + b) > c) {...}

For rule 4), if we remove the 'UINTN' type cast like:
if (a + b > c) {...}
The VS compiler will complain with warning C4018 (signed/unsigned
mismatch, level 3 warning) due to promoting 'a + b' to type 'int'.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>
2017-03-06 14:33:22 +08:00

3297 lines
107 KiB
C
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/** @file
ConsoleOut Routines that speak VGA.
Copyright (c) 2007 - 2017, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions
of the BSD License which accompanies this distribution. The
full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "BiosVideo.h"
//
// EFI Driver Binding Protocol Instance
//
EFI_DRIVER_BINDING_PROTOCOL gBiosVideoDriverBinding = {
BiosVideoDriverBindingSupported,
BiosVideoDriverBindingStart,
BiosVideoDriverBindingStop,
0x3,
NULL,
NULL
};
//
// Global lookup tables for VGA graphics modes
//
UINT8 mVgaLeftMaskTable[] = { 0xff, 0x7f, 0x3f, 0x1f, 0x0f, 0x07, 0x03, 0x01 };
UINT8 mVgaRightMaskTable[] = { 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
UINT8 mVgaBitMaskTable[] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
//
// Save controller attributes during first start
//
UINT64 mOriginalPciAttributes;
BOOLEAN mPciAttributesSaved = FALSE;
EFI_GRAPHICS_OUTPUT_BLT_PIXEL mVgaColorToGraphicsOutputColor[] = {
{ 0x00, 0x00, 0x00, 0x00 },
{ 0x98, 0x00, 0x00, 0x00 },
{ 0x00, 0x98, 0x00, 0x00 },
{ 0x98, 0x98, 0x00, 0x00 },
{ 0x00, 0x00, 0x98, 0x00 },
{ 0x98, 0x00, 0x98, 0x00 },
{ 0x00, 0x98, 0x98, 0x00 },
{ 0x98, 0x98, 0x98, 0x00 },
{ 0x10, 0x10, 0x10, 0x00 },
{ 0xff, 0x10, 0x10, 0x00 },
{ 0x10, 0xff, 0x10, 0x00 },
{ 0xff, 0xff, 0x10, 0x00 },
{ 0x10, 0x10, 0xff, 0x00 },
{ 0xf0, 0x10, 0xff, 0x00 },
{ 0x10, 0xff, 0xff, 0x00 },
{ 0xff, 0xff, 0xff, 0x00 }
};
//
// Standard timing defined by VESA EDID
//
VESA_BIOS_EXTENSIONS_EDID_TIMING mEstablishedEdidTiming[] = {
//
// Established Timing I
//
{800, 600, 60},
{800, 600, 56},
{640, 480, 75},
{640, 480, 72},
{640, 480, 67},
{640, 480, 60},
{720, 400, 88},
{720, 400, 70},
//
// Established Timing II
//
{1280, 1024, 75},
{1024, 768, 75},
{1024, 768, 70},
{1024, 768, 60},
{1024, 768, 87},
{832, 624, 75},
{800, 600, 75},
{800, 600, 72},
//
// Established Timing III
//
{1152, 870, 75}
};
/**
Supported.
@param This Pointer to driver binding protocol
@param Controller Controller handle to connect
@param RemainingDevicePath A pointer to the remaining portion of a device
path
@retval EFI_STATUS EFI_SUCCESS:This controller can be managed by this
driver, Otherwise, this controller cannot be
managed by this driver
**/
EFI_STATUS
EFIAPI
BiosVideoDriverBindingSupported (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
{
EFI_STATUS Status;
EFI_LEGACY_BIOS_PROTOCOL *LegacyBios;
EFI_PCI_IO_PROTOCOL *PciIo;
PCI_TYPE00 Pci;
EFI_DEV_PATH *Node;
//
// See if the Legacy BIOS Protocol is available
//
Status = gBS->LocateProtocol (&gEfiLegacyBiosProtocolGuid, NULL, (VOID **) &LegacyBios);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Open the IO Abstraction(s) needed to perform the supported test
//
Status = gBS->OpenProtocol (
Controller,
&gEfiPciIoProtocolGuid,
(VOID **) &PciIo,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status) && (Status != EFI_ALREADY_STARTED)) {
return Status;
}
if (Status == EFI_ALREADY_STARTED) {
//
// If VgaMiniPort protocol is installed, EFI_ALREADY_STARTED indicates failure,
// because VgaMiniPort protocol is installed on controller handle directly.
//
Status = gBS->OpenProtocol (
Controller,
&gEfiVgaMiniPortProtocolGuid,
NULL,
NULL,
NULL,
EFI_OPEN_PROTOCOL_TEST_PROTOCOL
);
if (!EFI_ERROR (Status)) {
return EFI_ALREADY_STARTED;
}
}
//
// See if this is a PCI Graphics Controller by looking at the Command register and
// Class Code Register
//
Status = PciIo->Pci.Read (
PciIo,
EfiPciIoWidthUint32,
0,
sizeof (Pci) / sizeof (UINT32),
&Pci
);
if (EFI_ERROR (Status)) {
Status = EFI_UNSUPPORTED;
goto Done;
}
Status = EFI_UNSUPPORTED;
if (Pci.Hdr.ClassCode[2] == 0x03 || (Pci.Hdr.ClassCode[2] == 0x00 && Pci.Hdr.ClassCode[1] == 0x01)) {
Status = EFI_SUCCESS;
//
// If this is a graphics controller,
// go further check RemainingDevicePath validation
//
if (RemainingDevicePath != NULL) {
Node = (EFI_DEV_PATH *) RemainingDevicePath;
//
// Check if RemainingDevicePath is the End of Device Path Node,
// if yes, return EFI_SUCCESS
//
if (!IsDevicePathEnd (Node)) {
//
// If RemainingDevicePath isn't the End of Device Path Node,
// check its validation
//
if (Node->DevPath.Type != ACPI_DEVICE_PATH ||
Node->DevPath.SubType != ACPI_ADR_DP ||
DevicePathNodeLength(&Node->DevPath) < sizeof(ACPI_ADR_DEVICE_PATH)) {
Status = EFI_UNSUPPORTED;
}
}
}
}
Done:
gBS->CloseProtocol (
Controller,
&gEfiPciIoProtocolGuid,
This->DriverBindingHandle,
Controller
);
return Status;
}
/**
Install Graphics Output Protocol onto VGA device handles.
@param This Pointer to driver binding protocol
@param Controller Controller handle to connect
@param RemainingDevicePath A pointer to the remaining portion of a device
path
@return EFI_STATUS
**/
EFI_STATUS
EFIAPI
BiosVideoDriverBindingStart (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
{
EFI_STATUS Status;
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
EFI_PCI_IO_PROTOCOL *PciIo;
EFI_LEGACY_BIOS_PROTOCOL *LegacyBios;
UINTN Flags;
UINT64 Supports;
//
// Initialize local variables
//
PciIo = NULL;
ParentDevicePath = NULL;
//
//
// See if the Legacy BIOS Protocol is available
//
Status = gBS->LocateProtocol (&gEfiLegacyBiosProtocolGuid, NULL, (VOID **) &LegacyBios);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Prepare for status code
//
Status = gBS->HandleProtocol (
Controller,
&gEfiDevicePathProtocolGuid,
(VOID **) &ParentDevicePath
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Open the IO Abstraction(s) needed
//
Status = gBS->OpenProtocol (
Controller,
&gEfiPciIoProtocolGuid,
(VOID **) &PciIo,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status) && (Status != EFI_ALREADY_STARTED)) {
return Status;
}
//
// Save original PCI attributes
//
if (!mPciAttributesSaved) {
Status = PciIo->Attributes (
PciIo,
EfiPciIoAttributeOperationGet,
0,
&mOriginalPciAttributes
);
if (EFI_ERROR (Status)) {
goto Done;
}
mPciAttributesSaved = TRUE;
}
//
// Get supported PCI attributes
//
Status = PciIo->Attributes (
PciIo,
EfiPciIoAttributeOperationSupported,
0,
&Supports
);
if (EFI_ERROR (Status)) {
goto Done;
}
Supports &= (UINT64)(EFI_PCI_IO_ATTRIBUTE_VGA_IO | EFI_PCI_IO_ATTRIBUTE_VGA_IO_16);
if (Supports == 0 || Supports == (EFI_PCI_IO_ATTRIBUTE_VGA_IO | EFI_PCI_IO_ATTRIBUTE_VGA_IO_16)) {
Status = EFI_UNSUPPORTED;
goto Done;
}
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_PROGRESS_CODE,
EFI_PERIPHERAL_LOCAL_CONSOLE | EFI_P_PC_ENABLE,
ParentDevicePath
);
//
// Enable the device and make sure VGA cycles are being forwarded to this VGA device
//
Status = PciIo->Attributes (
PciIo,
EfiPciIoAttributeOperationEnable,
EFI_PCI_DEVICE_ENABLE | EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY | Supports,
NULL
);
if (EFI_ERROR (Status)) {
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_ERROR_CODE | EFI_ERROR_MINOR,
EFI_PERIPHERAL_LOCAL_CONSOLE | EFI_P_EC_RESOURCE_CONFLICT,
ParentDevicePath
);
goto Done;
}
//
// Check to see if there is a legacy option ROM image associated with this PCI device
//
Status = LegacyBios->CheckPciRom (
LegacyBios,
Controller,
NULL,
NULL,
&Flags
);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Post the legacy option ROM if it is available.
//
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_PROGRESS_CODE,
EFI_P_PC_RESET,
ParentDevicePath
);
Status = LegacyBios->InstallPciRom (
LegacyBios,
Controller,
NULL,
&Flags,
NULL,
NULL,
NULL,
NULL
);
if (EFI_ERROR (Status)) {
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_ERROR_CODE | EFI_ERROR_MINOR,
EFI_PERIPHERAL_LOCAL_CONSOLE | EFI_P_EC_CONTROLLER_ERROR,
ParentDevicePath
);
goto Done;
}
if (RemainingDevicePath != NULL) {
if (IsDevicePathEnd (RemainingDevicePath) &&
(FeaturePcdGet (PcdBiosVideoCheckVbeEnable) || FeaturePcdGet (PcdBiosVideoCheckVgaEnable))) {
//
// If RemainingDevicePath is the End of Device Path Node,
// don't create any child device and return EFI_SUCESS
Status = EFI_SUCCESS;
goto Done;
}
}
//
// Create child handle and install GraphicsOutputProtocol on it
//
Status = BiosVideoChildHandleInstall (
This,
Controller,
PciIo,
LegacyBios,
ParentDevicePath,
RemainingDevicePath
);
Done:
if ((EFI_ERROR (Status)) && (Status != EFI_ALREADY_STARTED)) {
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_PROGRESS_CODE,
EFI_PERIPHERAL_LOCAL_CONSOLE | EFI_P_PC_DISABLE,
ParentDevicePath
);
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_PROGRESS_CODE,
EFI_PERIPHERAL_LOCAL_CONSOLE | EFI_P_EC_NOT_DETECTED,
ParentDevicePath
);
if (!HasChildHandle (Controller)) {
if (mPciAttributesSaved) {
//
// Restore original PCI attributes
//
PciIo->Attributes (
PciIo,
EfiPciIoAttributeOperationSet,
mOriginalPciAttributes,
NULL
);
}
}
//
// Release PCI I/O Protocols on the controller handle.
//
gBS->CloseProtocol (
Controller,
&gEfiPciIoProtocolGuid,
This->DriverBindingHandle,
Controller
);
}
return Status;
}
/**
Stop.
@param This Pointer to driver binding protocol
@param Controller Controller handle to connect
@param NumberOfChildren Number of children handle created by this driver
@param ChildHandleBuffer Buffer containing child handle created
@retval EFI_SUCCESS Driver disconnected successfully from controller
@retval EFI_UNSUPPORTED Cannot find BIOS_VIDEO_DEV structure
**/
EFI_STATUS
EFIAPI
BiosVideoDriverBindingStop (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer
)
{
EFI_STATUS Status;
BOOLEAN AllChildrenStopped;
UINTN Index;
EFI_PCI_IO_PROTOCOL *PciIo;
AllChildrenStopped = TRUE;
if (NumberOfChildren == 0) {
//
// Close PCI I/O protocol on the controller handle
//
gBS->CloseProtocol (
Controller,
&gEfiPciIoProtocolGuid,
This->DriverBindingHandle,
Controller
);
return EFI_SUCCESS;
}
for (Index = 0; Index < NumberOfChildren; Index++) {
Status = BiosVideoChildHandleUninstall (This, Controller, ChildHandleBuffer[Index]);
if (EFI_ERROR (Status)) {
AllChildrenStopped = FALSE;
}
}
if (!AllChildrenStopped) {
return EFI_DEVICE_ERROR;
}
if (!HasChildHandle (Controller)) {
if (mPciAttributesSaved) {
Status = gBS->HandleProtocol (
Controller,
&gEfiPciIoProtocolGuid,
(VOID **) &PciIo
);
ASSERT_EFI_ERROR (Status);
//
// Restore original PCI attributes
//
Status = PciIo->Attributes (
PciIo,
EfiPciIoAttributeOperationSet,
mOriginalPciAttributes,
NULL
);
ASSERT_EFI_ERROR (Status);
}
}
return EFI_SUCCESS;
}
/**
Install child handles if the Handle supports MBR format.
@param This Calling context.
@param ParentHandle Parent Handle
@param ParentPciIo Parent PciIo interface
@param ParentLegacyBios Parent LegacyBios interface
@param ParentDevicePath Parent Device Path
@param RemainingDevicePath Remaining Device Path
@retval EFI_SUCCESS If a child handle was added
@retval other A child handle was not added
**/
EFI_STATUS
BiosVideoChildHandleInstall (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ParentHandle,
IN EFI_PCI_IO_PROTOCOL *ParentPciIo,
IN EFI_LEGACY_BIOS_PROTOCOL *ParentLegacyBios,
IN EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
{
EFI_STATUS Status;
BIOS_VIDEO_DEV *BiosVideoPrivate;
PCI_TYPE00 Pci;
ACPI_ADR_DEVICE_PATH AcpiDeviceNode;
BOOLEAN ProtocolInstalled;
//
// Allocate the private device structure for video device
//
BiosVideoPrivate = (BIOS_VIDEO_DEV *) AllocateZeroPool (
sizeof (BIOS_VIDEO_DEV)
);
if (NULL == BiosVideoPrivate) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
//
// See if this is a VGA compatible controller or not
//
Status = ParentPciIo->Pci.Read (
ParentPciIo,
EfiPciIoWidthUint32,
0,
sizeof (Pci) / sizeof (UINT32),
&Pci
);
if (EFI_ERROR (Status)) {
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_ERROR_CODE | EFI_ERROR_MINOR,
EFI_PERIPHERAL_LOCAL_CONSOLE | EFI_P_EC_CONTROLLER_ERROR,
ParentDevicePath
);
goto Done;
}
BiosVideoPrivate->VgaCompatible = FALSE;
if (Pci.Hdr.ClassCode[2] == 0x00 && Pci.Hdr.ClassCode[1] == 0x01) {
BiosVideoPrivate->VgaCompatible = TRUE;
}
if (Pci.Hdr.ClassCode[2] == 0x03 && Pci.Hdr.ClassCode[1] == 0x00 && Pci.Hdr.ClassCode[0] == 0x00) {
BiosVideoPrivate->VgaCompatible = TRUE;
}
if (PcdGetBool (PcdBiosVideoSetTextVgaModeEnable)) {
//
// Create EXIT_BOOT_SERIVES Event
//
Status = gBS->CreateEventEx (
EVT_NOTIFY_SIGNAL,
TPL_NOTIFY,
BiosVideoNotifyExitBootServices,
BiosVideoPrivate,
&gEfiEventExitBootServicesGuid,
&BiosVideoPrivate->ExitBootServicesEvent
);
if (EFI_ERROR (Status)) {
goto Done;
}
}
//
// Initialize the child private structure
//
BiosVideoPrivate->Signature = BIOS_VIDEO_DEV_SIGNATURE;
//
// Fill in Graphics Output specific mode structures
//
BiosVideoPrivate->HardwareNeedsStarting = TRUE;
BiosVideoPrivate->ModeData = NULL;
BiosVideoPrivate->LineBuffer = NULL;
BiosVideoPrivate->VgaFrameBuffer = NULL;
BiosVideoPrivate->VbeFrameBuffer = NULL;
//
// Fill in the Graphics Output Protocol
//
BiosVideoPrivate->GraphicsOutput.QueryMode = BiosVideoGraphicsOutputQueryMode;
BiosVideoPrivate->GraphicsOutput.SetMode = BiosVideoGraphicsOutputSetMode;
//
// Allocate buffer for Graphics Output Protocol mode information
//
BiosVideoPrivate->GraphicsOutput.Mode = (EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE *) AllocatePool (
sizeof (EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE)
);
if (NULL == BiosVideoPrivate->GraphicsOutput.Mode) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
BiosVideoPrivate->GraphicsOutput.Mode->Info = (EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *) AllocatePool (
sizeof (EFI_GRAPHICS_OUTPUT_MODE_INFORMATION)
);
if (NULL == BiosVideoPrivate->GraphicsOutput.Mode->Info) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
//
// Assume that Graphics Output Protocol will be produced until proven otherwise
//
BiosVideoPrivate->ProduceGraphicsOutput = TRUE;
//
// Set Gop Device Path, here RemainingDevicePath will not be one End of Device Path Node.
//
if ((RemainingDevicePath == NULL) || (!IsDevicePathEnd (RemainingDevicePath))) {
if (RemainingDevicePath == NULL) {
ZeroMem (&AcpiDeviceNode, sizeof (ACPI_ADR_DEVICE_PATH));
AcpiDeviceNode.Header.Type = ACPI_DEVICE_PATH;
AcpiDeviceNode.Header.SubType = ACPI_ADR_DP;
AcpiDeviceNode.ADR = ACPI_DISPLAY_ADR (1, 0, 0, 1, 0, ACPI_ADR_DISPLAY_TYPE_VGA, 0, 0);
SetDevicePathNodeLength (&AcpiDeviceNode.Header, sizeof (ACPI_ADR_DEVICE_PATH));
BiosVideoPrivate->GopDevicePath = AppendDevicePathNode (
ParentDevicePath,
(EFI_DEVICE_PATH_PROTOCOL *) &AcpiDeviceNode
);
} else {
BiosVideoPrivate->GopDevicePath = AppendDevicePathNode (ParentDevicePath, RemainingDevicePath);
}
//
// Creat child handle and device path protocol firstly
//
BiosVideoPrivate->Handle = NULL;
Status = gBS->InstallMultipleProtocolInterfaces (
&BiosVideoPrivate->Handle,
&gEfiDevicePathProtocolGuid,
BiosVideoPrivate->GopDevicePath,
NULL
);
if (EFI_ERROR (Status)) {
goto Done;
}
}
//
// Fill in the VGA Mini Port Protocol fields
//
BiosVideoPrivate->VgaMiniPort.SetMode = BiosVideoVgaMiniPortSetMode;
BiosVideoPrivate->VgaMiniPort.VgaMemoryOffset = 0xb8000;
BiosVideoPrivate->VgaMiniPort.CrtcAddressRegisterOffset = 0x3d4;
BiosVideoPrivate->VgaMiniPort.CrtcDataRegisterOffset = 0x3d5;
BiosVideoPrivate->VgaMiniPort.VgaMemoryBar = EFI_PCI_IO_PASS_THROUGH_BAR;
BiosVideoPrivate->VgaMiniPort.CrtcAddressRegisterBar = EFI_PCI_IO_PASS_THROUGH_BAR;
BiosVideoPrivate->VgaMiniPort.CrtcDataRegisterBar = EFI_PCI_IO_PASS_THROUGH_BAR;
//
// Child handle need to consume the Legacy Bios protocol
//
BiosVideoPrivate->LegacyBios = ParentLegacyBios;
//
// When check for VBE, PCI I/O protocol is needed, so use parent's protocol interface temporally
//
BiosVideoPrivate->PciIo = ParentPciIo;
//
// Check for VESA BIOS Extensions for modes that are compatible with Graphics Output
//
if (FeaturePcdGet (PcdBiosVideoCheckVbeEnable)) {
Status = BiosVideoCheckForVbe (BiosVideoPrivate);
DEBUG ((EFI_D_INFO, "BiosVideoCheckForVbe - %r\n", Status));
} else {
Status = EFI_UNSUPPORTED;
}
if (EFI_ERROR (Status)) {
//
// The VESA BIOS Extensions are not compatible with Graphics Output, so check for support
// for the standard 640x480 16 color VGA mode
//
DEBUG ((EFI_D_INFO, "VgaCompatible - %x\n", BiosVideoPrivate->VgaCompatible));
if (BiosVideoPrivate->VgaCompatible) {
if (FeaturePcdGet (PcdBiosVideoCheckVgaEnable)) {
Status = BiosVideoCheckForVga (BiosVideoPrivate);
DEBUG ((EFI_D_INFO, "BiosVideoCheckForVga - %r\n", Status));
} else {
Status = EFI_UNSUPPORTED;
}
}
if (EFI_ERROR (Status)) {
//
// Free GOP mode structure if it is not freed before
// VgaMiniPort does not need this structure any more
//
if (BiosVideoPrivate->GraphicsOutput.Mode != NULL) {
if (BiosVideoPrivate->GraphicsOutput.Mode->Info != NULL) {
FreePool (BiosVideoPrivate->GraphicsOutput.Mode->Info);
BiosVideoPrivate->GraphicsOutput.Mode->Info = NULL;
}
FreePool (BiosVideoPrivate->GraphicsOutput.Mode);
BiosVideoPrivate->GraphicsOutput.Mode = NULL;
}
//
// Neither VBE nor the standard 640x480 16 color VGA mode are supported, so do
// not produce the Graphics Output protocol. Instead, produce the VGA MiniPort Protocol.
//
BiosVideoPrivate->ProduceGraphicsOutput = FALSE;
//
// INT services are available, so on the 80x25 and 80x50 text mode are supported
//
BiosVideoPrivate->VgaMiniPort.MaxMode = 2;
}
}
ProtocolInstalled = FALSE;
if (BiosVideoPrivate->ProduceGraphicsOutput) {
//
// Creat child handle and install Graphics Output Protocol,EDID Discovered/Active Protocol
//
Status = gBS->InstallMultipleProtocolInterfaces (
&BiosVideoPrivate->Handle,
&gEfiGraphicsOutputProtocolGuid,
&BiosVideoPrivate->GraphicsOutput,
&gEfiEdidDiscoveredProtocolGuid,
&BiosVideoPrivate->EdidDiscovered,
&gEfiEdidActiveProtocolGuid,
&BiosVideoPrivate->EdidActive,
NULL
);
if (!EFI_ERROR (Status)) {
//
// Open the Parent Handle for the child
//
Status = gBS->OpenProtocol (
ParentHandle,
&gEfiPciIoProtocolGuid,
(VOID **) &BiosVideoPrivate->PciIo,
This->DriverBindingHandle,
BiosVideoPrivate->Handle,
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
);
if (EFI_ERROR (Status)) {
goto Done;
}
ProtocolInstalled = TRUE;
}
}
if (!ProtocolInstalled) {
//
// Install VGA Mini Port Protocol
//
Status = gBS->InstallMultipleProtocolInterfaces (
&ParentHandle,
&gEfiVgaMiniPortProtocolGuid,
&BiosVideoPrivate->VgaMiniPort,
NULL
);
}
Done:
if (EFI_ERROR (Status)) {
if ((BiosVideoPrivate != NULL) && (BiosVideoPrivate->ExitBootServicesEvent != NULL)) {
gBS->CloseEvent (BiosVideoPrivate->ExitBootServicesEvent);
}
//
// Free private data structure
//
BiosVideoDeviceReleaseResource (BiosVideoPrivate);
}
return Status;
}
/**
Deregister an video child handle and free resources.
@param This Protocol instance pointer.
@param Controller Video controller handle
@param Handle Video child handle
@return EFI_STATUS
**/
EFI_STATUS
BiosVideoChildHandleUninstall (
EFI_DRIVER_BINDING_PROTOCOL *This,
EFI_HANDLE Controller,
EFI_HANDLE Handle
)
{
EFI_STATUS Status;
EFI_IA32_REGISTER_SET Regs;
EFI_GRAPHICS_OUTPUT_PROTOCOL *GraphicsOutput;
EFI_VGA_MINI_PORT_PROTOCOL *VgaMiniPort;
BIOS_VIDEO_DEV *BiosVideoPrivate;
EFI_PCI_IO_PROTOCOL *PciIo;
BiosVideoPrivate = NULL;
GraphicsOutput = NULL;
PciIo = NULL;
Status = EFI_UNSUPPORTED;
Status = gBS->OpenProtocol (
Handle,
&gEfiGraphicsOutputProtocolGuid,
(VOID **) &GraphicsOutput,
This->DriverBindingHandle,
Handle,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (!EFI_ERROR (Status)) {
BiosVideoPrivate = BIOS_VIDEO_DEV_FROM_GRAPHICS_OUTPUT_THIS (GraphicsOutput);
}
if (EFI_ERROR (Status)) {
Status = gBS->OpenProtocol (
Handle,
&gEfiVgaMiniPortProtocolGuid,
(VOID **) &VgaMiniPort,
This->DriverBindingHandle,
Handle,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (!EFI_ERROR (Status)) {
BiosVideoPrivate = BIOS_VIDEO_DEV_FROM_VGA_MINI_PORT_THIS (VgaMiniPort);
}
}
if (BiosVideoPrivate == NULL) {
return EFI_UNSUPPORTED;
}
//
// Set the 80x25 Text VGA Mode
//
Regs.H.AH = 0x00;
Regs.H.AL = 0x03;
BiosVideoPrivate->LegacyBios->Int86 (BiosVideoPrivate->LegacyBios, 0x10, &Regs);
Regs.H.AH = 0x11;
Regs.H.AL = 0x14;
Regs.H.BL = 0;
BiosVideoPrivate->LegacyBios->Int86 (BiosVideoPrivate->LegacyBios, 0x10, &Regs);
//
// Close PCI I/O protocol that opened by child handle
//
Status = gBS->CloseProtocol (
Controller,
&gEfiPciIoProtocolGuid,
This->DriverBindingHandle,
Handle
);
//
// Uninstall protocols on child handle
//
if (BiosVideoPrivate->ProduceGraphicsOutput) {
Status = gBS->UninstallMultipleProtocolInterfaces (
BiosVideoPrivate->Handle,
&gEfiDevicePathProtocolGuid,
BiosVideoPrivate->GopDevicePath,
&gEfiGraphicsOutputProtocolGuid,
&BiosVideoPrivate->GraphicsOutput,
&gEfiEdidDiscoveredProtocolGuid,
&BiosVideoPrivate->EdidDiscovered,
&gEfiEdidActiveProtocolGuid,
&BiosVideoPrivate->EdidActive,
NULL
);
}
if (!BiosVideoPrivate->ProduceGraphicsOutput) {
Status = gBS->UninstallMultipleProtocolInterfaces (
Controller,
&gEfiVgaMiniPortProtocolGuid,
&BiosVideoPrivate->VgaMiniPort,
NULL
);
}
if (EFI_ERROR (Status)) {
gBS->OpenProtocol (
Controller,
&gEfiPciIoProtocolGuid,
(VOID **) &PciIo,
This->DriverBindingHandle,
Handle,
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
);
return Status;
}
if (PcdGetBool (PcdBiosVideoSetTextVgaModeEnable)) {
//
// Close EXIT_BOOT_SERIVES Event
//
gBS->CloseEvent (BiosVideoPrivate->ExitBootServicesEvent);
}
//
// Release all allocated resources
//
BiosVideoDeviceReleaseResource (BiosVideoPrivate);
return EFI_SUCCESS;
}
/**
Release resource for biso video instance.
@param BiosVideoPrivate Video child device private data structure
**/
VOID
BiosVideoDeviceReleaseResource (
BIOS_VIDEO_DEV *BiosVideoPrivate
)
{
if (BiosVideoPrivate == NULL) {
return ;
}
//
// Release all the resourses occupied by the BIOS_VIDEO_DEV
//
//
// Free VGA Frame Buffer
//
if (BiosVideoPrivate->VgaFrameBuffer != NULL) {
FreePool (BiosVideoPrivate->VgaFrameBuffer);
}
//
// Free VBE Frame Buffer
//
if (BiosVideoPrivate->VbeFrameBuffer != NULL) {
FreePool (BiosVideoPrivate->VbeFrameBuffer);
}
//
// Free line buffer
//
if (BiosVideoPrivate->LineBuffer != NULL) {
FreePool (BiosVideoPrivate->LineBuffer);
}
//
// Free mode data
//
if (BiosVideoPrivate->ModeData != NULL) {
FreePool (BiosVideoPrivate->ModeData);
}
//
// Free memory allocated below 1MB
//
if (BiosVideoPrivate->PagesBelow1MB != 0) {
gBS->FreePages (BiosVideoPrivate->PagesBelow1MB, BiosVideoPrivate->NumberOfPagesBelow1MB);
}
if (BiosVideoPrivate->VbeSaveRestorePages != 0) {
gBS->FreePages (BiosVideoPrivate->VbeSaveRestoreBuffer, BiosVideoPrivate->VbeSaveRestorePages);
}
//
// Free graphics output protocol occupied resource
//
if (BiosVideoPrivate->GraphicsOutput.Mode != NULL) {
if (BiosVideoPrivate->GraphicsOutput.Mode->Info != NULL) {
FreePool (BiosVideoPrivate->GraphicsOutput.Mode->Info);
BiosVideoPrivate->GraphicsOutput.Mode->Info = NULL;
}
FreePool (BiosVideoPrivate->GraphicsOutput.Mode);
BiosVideoPrivate->GraphicsOutput.Mode = NULL;
}
//
// Free EDID discovered protocol occupied resource
//
if (BiosVideoPrivate->EdidDiscovered.Edid != NULL) {
FreePool (BiosVideoPrivate->EdidDiscovered.Edid);
}
//
// Free EDID active protocol occupied resource
//
if (BiosVideoPrivate->EdidActive.Edid != NULL) {
FreePool (BiosVideoPrivate->EdidActive.Edid);
}
if (BiosVideoPrivate->GopDevicePath!= NULL) {
FreePool (BiosVideoPrivate->GopDevicePath);
}
FreePool (BiosVideoPrivate);
return ;
}
/**
Generate a search key for a specified timing data.
@param EdidTiming Pointer to EDID timing
@return The 32 bit unique key for search.
**/
UINT32
CalculateEdidKey (
VESA_BIOS_EXTENSIONS_EDID_TIMING *EdidTiming
)
{
UINT32 Key;
//
// Be sure no conflicts for all standard timing defined by VESA.
//
Key = (EdidTiming->HorizontalResolution * 2) + EdidTiming->VerticalResolution;
return Key;
}
/**
Parse the Established Timing and Standard Timing in EDID data block.
@param EdidBuffer Pointer to EDID data block
@param ValidEdidTiming Valid EDID timing information
@retval TRUE The EDID data is valid.
@retval FALSE The EDID data is invalid.
**/
BOOLEAN
ParseEdidData (
UINT8 *EdidBuffer,
VESA_BIOS_EXTENSIONS_VALID_EDID_TIMING *ValidEdidTiming
)
{
UINT8 CheckSum;
UINT32 Index;
UINT32 ValidNumber;
UINT32 TimingBits;
UINT8 *BufferIndex;
UINT16 HorizontalResolution;
UINT16 VerticalResolution;
UINT8 AspectRatio;
UINT8 RefreshRate;
VESA_BIOS_EXTENSIONS_EDID_TIMING TempTiming;
VESA_BIOS_EXTENSIONS_EDID_DATA_BLOCK *EdidDataBlock;
EdidDataBlock = (VESA_BIOS_EXTENSIONS_EDID_DATA_BLOCK *) EdidBuffer;
//
// Check the checksum of EDID data
//
CheckSum = 0;
for (Index = 0; Index < VESA_BIOS_EXTENSIONS_EDID_BLOCK_SIZE; Index ++) {
CheckSum = (UINT8) (CheckSum + EdidBuffer[Index]);
}
if (CheckSum != 0) {
return FALSE;
}
ValidNumber = 0;
gBS->SetMem (ValidEdidTiming, sizeof (VESA_BIOS_EXTENSIONS_VALID_EDID_TIMING), 0);
if ((EdidDataBlock->EstablishedTimings[0] != 0) ||
(EdidDataBlock->EstablishedTimings[1] != 0) ||
(EdidDataBlock->EstablishedTimings[2] != 0)
) {
//
// Established timing data
//
TimingBits = EdidDataBlock->EstablishedTimings[0] |
(EdidDataBlock->EstablishedTimings[1] << 8) |
((EdidDataBlock->EstablishedTimings[2] & 0x80) << 9) ;
for (Index = 0; Index < VESA_BIOS_EXTENSIONS_EDID_ESTABLISHED_TIMING_MAX_NUMBER; Index ++) {
if ((TimingBits & 0x1) != 0) {
DEBUG ((EFI_D_INFO, "Established Timing: %d x %d\n",
mEstablishedEdidTiming[Index].HorizontalResolution, mEstablishedEdidTiming[Index].VerticalResolution));
ValidEdidTiming->Key[ValidNumber] = CalculateEdidKey (&mEstablishedEdidTiming[Index]);
ValidNumber ++;
}
TimingBits = TimingBits >> 1;
}
}
//
// Parse the standard timing data
//
BufferIndex = &EdidDataBlock->StandardTimingIdentification[0];
for (Index = 0; Index < 8; Index ++) {
//
// Check if this is a valid Standard Timing entry
// VESA documents unused fields should be set to 01h
//
if ((BufferIndex[0] != 0x1) && (BufferIndex[1] != 0x1)){
//
// A valid Standard Timing
//
HorizontalResolution = (UINT16) (BufferIndex[0] * 8 + 248);
AspectRatio = (UINT8) (BufferIndex[1] >> 6);
switch (AspectRatio) {
case 0:
VerticalResolution = (UINT16) (HorizontalResolution / 16 * 10);
break;
case 1:
VerticalResolution = (UINT16) (HorizontalResolution / 4 * 3);
break;
case 2:
VerticalResolution = (UINT16) (HorizontalResolution / 5 * 4);
break;
case 3:
VerticalResolution = (UINT16) (HorizontalResolution / 16 * 9);
break;
default:
VerticalResolution = (UINT16) (HorizontalResolution / 4 * 3);
break;
}
RefreshRate = (UINT8) ((BufferIndex[1] & 0x1f) + 60);
DEBUG ((EFI_D_INFO, "Standard Timing: %d x %d\n", HorizontalResolution, VerticalResolution));
TempTiming.HorizontalResolution = HorizontalResolution;
TempTiming.VerticalResolution = VerticalResolution;
TempTiming.RefreshRate = RefreshRate;
ValidEdidTiming->Key[ValidNumber] = CalculateEdidKey (&TempTiming);
ValidNumber ++;
}
BufferIndex += 2;
}
//
// Parse the Detailed Timing data
//
BufferIndex = &EdidDataBlock->DetailedTimingDescriptions[0];
for (Index = 0; Index < 4; Index ++, BufferIndex += VESA_BIOS_EXTENSIONS_DETAILED_TIMING_EACH_DESCRIPTOR_SIZE) {
if ((BufferIndex[0] == 0x0) && (BufferIndex[1] == 0x0)) {
//
// Check if this is a valid Detailed Timing Descriptor
// If first 2 bytes are zero, it is monitor descriptor other than detailed timing descriptor
//
continue;
}
//
// Calculate Horizontal and Vertical resolution
//
TempTiming.HorizontalResolution = ((UINT16)(BufferIndex[4] & 0xF0) << 4) | (BufferIndex[2]);
TempTiming.VerticalResolution = ((UINT16)(BufferIndex[7] & 0xF0) << 4) | (BufferIndex[5]);
DEBUG ((EFI_D_INFO, "Detailed Timing %d: %d x %d\n",
Index, TempTiming.HorizontalResolution, TempTiming.VerticalResolution));
ValidEdidTiming->Key[ValidNumber] = CalculateEdidKey (&TempTiming);
ValidNumber ++;
}
ValidEdidTiming->ValidNumber = ValidNumber;
return TRUE;
}
/**
Search a specified Timing in all the valid EDID timings.
@param ValidEdidTiming All valid EDID timing information.
@param EdidTiming The Timing to search for.
@retval TRUE Found.
@retval FALSE Not found.
**/
BOOLEAN
SearchEdidTiming (
VESA_BIOS_EXTENSIONS_VALID_EDID_TIMING *ValidEdidTiming,
VESA_BIOS_EXTENSIONS_EDID_TIMING *EdidTiming
)
{
UINT32 Index;
UINT32 Key;
Key = CalculateEdidKey (EdidTiming);
for (Index = 0; Index < ValidEdidTiming->ValidNumber; Index ++) {
if (Key == ValidEdidTiming->Key[Index]) {
return TRUE;
}
}
return FALSE;
}
/**
Check if all video child handles have been uninstalled.
@param Controller Video controller handle
@return TRUE Child handles exist.
@return FALSE All video child handles have been uninstalled.
**/
BOOLEAN
HasChildHandle (
IN EFI_HANDLE Controller
)
{
UINTN Index;
EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *OpenInfoBuffer;
UINTN EntryCount;
BOOLEAN HasChild;
EntryCount = 0;
HasChild = FALSE;
gBS->OpenProtocolInformation (
Controller,
&gEfiPciIoProtocolGuid,
&OpenInfoBuffer,
&EntryCount
);
for (Index = 0; Index < EntryCount; Index++) {
if ((OpenInfoBuffer[Index].Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0) {
HasChild = TRUE;
}
}
return HasChild;
}
/**
Check for VBE device.
@param BiosVideoPrivate Pointer to BIOS_VIDEO_DEV structure
@retval EFI_SUCCESS VBE device found
**/
EFI_STATUS
BiosVideoCheckForVbe (
IN OUT BIOS_VIDEO_DEV *BiosVideoPrivate
)
{
EFI_STATUS Status;
EFI_IA32_REGISTER_SET Regs;
UINT16 *ModeNumberPtr;
UINT16 VbeModeNumber;
BOOLEAN ModeFound;
BOOLEAN EdidFound;
BIOS_VIDEO_MODE_DATA *ModeBuffer;
BIOS_VIDEO_MODE_DATA *CurrentModeData;
UINTN PreferMode;
UINTN ModeNumber;
VESA_BIOS_EXTENSIONS_EDID_TIMING Timing;
VESA_BIOS_EXTENSIONS_VALID_EDID_TIMING ValidEdidTiming;
EFI_EDID_OVERRIDE_PROTOCOL *EdidOverride;
UINT32 EdidAttributes;
BOOLEAN EdidOverrideFound;
UINTN EdidOverrideDataSize;
UINT8 *EdidOverrideDataBlock;
UINTN EdidActiveDataSize;
UINT8 *EdidActiveDataBlock;
UINT32 HighestHorizontalResolution;
UINT32 HighestVerticalResolution;
UINTN HighestResolutionMode;
EdidFound = TRUE;
EdidOverrideFound = FALSE;
EdidOverrideDataBlock = NULL;
EdidActiveDataSize = 0;
EdidActiveDataBlock = NULL;
HighestHorizontalResolution = 0;
HighestVerticalResolution = 0;
HighestResolutionMode = 0;
//
// Allocate buffer under 1MB for VBE data structures
//
BiosVideoPrivate->NumberOfPagesBelow1MB = EFI_SIZE_TO_PAGES (
sizeof (VESA_BIOS_EXTENSIONS_INFORMATION_BLOCK) +
sizeof (VESA_BIOS_EXTENSIONS_MODE_INFORMATION_BLOCK) +
sizeof (VESA_BIOS_EXTENSIONS_EDID_DATA_BLOCK) +
sizeof (VESA_BIOS_EXTENSIONS_CRTC_INFORMATION_BLOCK)
);
BiosVideoPrivate->PagesBelow1MB = 0x00100000 - 1;
Status = gBS->AllocatePages (
AllocateMaxAddress,
EfiBootServicesData,
BiosVideoPrivate->NumberOfPagesBelow1MB,
&BiosVideoPrivate->PagesBelow1MB
);
if (EFI_ERROR (Status)) {
return Status;
}
ZeroMem (&ValidEdidTiming, sizeof (VESA_BIOS_EXTENSIONS_VALID_EDID_TIMING));
//
// Fill in the VBE related data structures
//
BiosVideoPrivate->VbeInformationBlock = (VESA_BIOS_EXTENSIONS_INFORMATION_BLOCK *) (UINTN) (BiosVideoPrivate->PagesBelow1MB);
BiosVideoPrivate->VbeModeInformationBlock = (VESA_BIOS_EXTENSIONS_MODE_INFORMATION_BLOCK *) (BiosVideoPrivate->VbeInformationBlock + 1);
BiosVideoPrivate->VbeEdidDataBlock = (VESA_BIOS_EXTENSIONS_EDID_DATA_BLOCK *) (BiosVideoPrivate->VbeModeInformationBlock + 1);
BiosVideoPrivate->VbeCrtcInformationBlock = (VESA_BIOS_EXTENSIONS_CRTC_INFORMATION_BLOCK *) (BiosVideoPrivate->VbeEdidDataBlock + 1);
BiosVideoPrivate->VbeSaveRestorePages = 0;
BiosVideoPrivate->VbeSaveRestoreBuffer = 0;
//
// Test to see if the Video Adapter is compliant with VBE 3.0
//
gBS->SetMem (&Regs, sizeof (Regs), 0);
Regs.X.AX = VESA_BIOS_EXTENSIONS_RETURN_CONTROLLER_INFORMATION;
gBS->SetMem (BiosVideoPrivate->VbeInformationBlock, sizeof (VESA_BIOS_EXTENSIONS_INFORMATION_BLOCK), 0);
BiosVideoPrivate->VbeInformationBlock->VESASignature = VESA_BIOS_EXTENSIONS_VBE2_SIGNATURE;
Regs.X.ES = EFI_SEGMENT ((UINTN) BiosVideoPrivate->VbeInformationBlock);
Regs.X.DI = EFI_OFFSET ((UINTN) BiosVideoPrivate->VbeInformationBlock);
BiosVideoPrivate->LegacyBios->Int86 (BiosVideoPrivate->LegacyBios, 0x10, &Regs);
Status = EFI_DEVICE_ERROR;
//
// See if the VESA call succeeded
//
if (Regs.X.AX != VESA_BIOS_EXTENSIONS_STATUS_SUCCESS) {
return Status;
}
//
// Check for 'VESA' signature
//
if (BiosVideoPrivate->VbeInformationBlock->VESASignature != VESA_BIOS_EXTENSIONS_VESA_SIGNATURE) {
return Status;
}
//
// Check to see if this is VBE 2.0 or higher
//
if (BiosVideoPrivate->VbeInformationBlock->VESAVersion < VESA_BIOS_EXTENSIONS_VERSION_2_0) {
return Status;
}
EdidFound = FALSE;
EdidAttributes = 0xff;
EdidOverrideDataSize = 0;
//
// Find EDID Override protocol firstly, this protocol is installed by platform if needed.
//
Status = gBS->LocateProtocol (
&gEfiEdidOverrideProtocolGuid,
NULL,
(VOID **) &EdidOverride
);
if (!EFI_ERROR (Status)) {
//
// Allocate double size of VESA_BIOS_EXTENSIONS_EDID_BLOCK_SIZE to avoid overflow
//
EdidOverrideDataBlock = AllocatePool (VESA_BIOS_EXTENSIONS_EDID_BLOCK_SIZE * 2);
if (NULL == EdidOverrideDataBlock) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
Status = EdidOverride->GetEdid (
EdidOverride,
BiosVideoPrivate->Handle,
&EdidAttributes,
&EdidOverrideDataSize,
(UINT8 **) &EdidOverrideDataBlock
);
if (!EFI_ERROR (Status) &&
EdidAttributes == 0 &&
EdidOverrideDataSize != 0) {
//
// Succeeded to get EDID Override Data
//
EdidOverrideFound = TRUE;
}
}
if (!EdidOverrideFound || EdidAttributes == EFI_EDID_OVERRIDE_DONT_OVERRIDE) {
//
// If EDID Override data doesn't exist or EFI_EDID_OVERRIDE_DONT_OVERRIDE returned,
// read EDID information through INT10 call
//
gBS->SetMem (&Regs, sizeof (Regs), 0);
Regs.X.AX = VESA_BIOS_EXTENSIONS_EDID;
Regs.X.BX = 1;
Regs.X.CX = 0;
Regs.X.DX = 0;
Regs.X.ES = EFI_SEGMENT ((UINTN) BiosVideoPrivate->VbeEdidDataBlock);
Regs.X.DI = EFI_OFFSET ((UINTN) BiosVideoPrivate->VbeEdidDataBlock);
BiosVideoPrivate->LegacyBios->Int86 (BiosVideoPrivate->LegacyBios, 0x10, &Regs);
//
// See if the VESA call succeeded
//
if (Regs.X.AX == VESA_BIOS_EXTENSIONS_STATUS_SUCCESS) {
//
// Set EDID Discovered Data
//
BiosVideoPrivate->EdidDiscovered.SizeOfEdid = VESA_BIOS_EXTENSIONS_EDID_BLOCK_SIZE;
BiosVideoPrivate->EdidDiscovered.Edid = (UINT8 *) AllocateCopyPool (
VESA_BIOS_EXTENSIONS_EDID_BLOCK_SIZE,
BiosVideoPrivate->VbeEdidDataBlock
);
if (NULL == BiosVideoPrivate->EdidDiscovered.Edid) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
EdidFound = TRUE;
}
}
if (EdidFound) {
EdidActiveDataSize = VESA_BIOS_EXTENSIONS_EDID_BLOCK_SIZE;
EdidActiveDataBlock = BiosVideoPrivate->EdidDiscovered.Edid;
} else if (EdidOverrideFound) {
EdidActiveDataSize = EdidOverrideDataSize;
EdidActiveDataBlock = EdidOverrideDataBlock;
EdidFound = TRUE;
}
if (EdidFound) {
//
// Parse EDID data structure to retrieve modes supported by monitor
//
if (ParseEdidData ((UINT8 *) EdidActiveDataBlock, &ValidEdidTiming)) {
//
// Copy EDID Override Data to EDID Active Data
//
BiosVideoPrivate->EdidActive.SizeOfEdid = (UINT32) EdidActiveDataSize;
BiosVideoPrivate->EdidActive.Edid = (UINT8 *) AllocateCopyPool (
EdidActiveDataSize,
EdidActiveDataBlock
);
if (NULL == BiosVideoPrivate->EdidActive.Edid) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
}
} else {
BiosVideoPrivate->EdidActive.SizeOfEdid = 0;
BiosVideoPrivate->EdidActive.Edid = NULL;
EdidFound = FALSE;
}
//
// Walk through the mode list to see if there is at least one mode the is compatible with the EDID mode
//
ModeNumberPtr = (UINT16 *)
(
(((UINTN) BiosVideoPrivate->VbeInformationBlock->VideoModePtr & 0xffff0000) >> 12) |
((UINTN) BiosVideoPrivate->VbeInformationBlock->VideoModePtr & 0x0000ffff)
);
PreferMode = 0;
ModeNumber = 0;
//
// ModeNumberPtr may be not 16-byte aligned, so ReadUnaligned16 is used to access the buffer pointed by ModeNumberPtr.
//
for (VbeModeNumber = ReadUnaligned16 (ModeNumberPtr);
VbeModeNumber != VESA_BIOS_EXTENSIONS_END_OF_MODE_LIST;
VbeModeNumber = ReadUnaligned16 (++ModeNumberPtr)) {
//
// Make sure this is a mode number defined by the VESA VBE specification. If it isn'tm then skip this mode number.
//
if ((VbeModeNumber & VESA_BIOS_EXTENSIONS_MODE_NUMBER_VESA) == 0) {
continue;
}
//
// Get the information about the mode
//
gBS->SetMem (&Regs, sizeof (Regs), 0);
Regs.X.AX = VESA_BIOS_EXTENSIONS_RETURN_MODE_INFORMATION;
Regs.X.CX = VbeModeNumber;
gBS->SetMem (BiosVideoPrivate->VbeModeInformationBlock, sizeof (VESA_BIOS_EXTENSIONS_MODE_INFORMATION_BLOCK), 0);
Regs.X.ES = EFI_SEGMENT ((UINTN) BiosVideoPrivate->VbeModeInformationBlock);
Regs.X.DI = EFI_OFFSET ((UINTN) BiosVideoPrivate->VbeModeInformationBlock);
BiosVideoPrivate->LegacyBios->Int86 (BiosVideoPrivate->LegacyBios, 0x10, &Regs);
//
// See if the call succeeded. If it didn't, then try the next mode.
//
if (Regs.X.AX != VESA_BIOS_EXTENSIONS_STATUS_SUCCESS) {
continue;
}
//
// See if the mode supports color. If it doesn't then try the next mode.
//
if ((BiosVideoPrivate->VbeModeInformationBlock->ModeAttributes & VESA_BIOS_EXTENSIONS_MODE_ATTRIBUTE_COLOR) == 0) {
continue;
}
//
// See if the mode supports graphics. If it doesn't then try the next mode.
//
if ((BiosVideoPrivate->VbeModeInformationBlock->ModeAttributes & VESA_BIOS_EXTENSIONS_MODE_ATTRIBUTE_GRAPHICS) == 0) {
continue;
}
//
// See if the mode supports a linear frame buffer. If it doesn't then try the next mode.
//
if ((BiosVideoPrivate->VbeModeInformationBlock->ModeAttributes & VESA_BIOS_EXTENSIONS_MODE_ATTRIBUTE_LINEAR_FRAME_BUFFER) == 0) {
continue;
}
//
// See if the mode supports 32 bit color. If it doesn't then try the next mode.
// 32 bit mode can be implemented by 24 Bits Per Pixels. Also make sure the
// number of bits per pixel is a multiple of 8 or more than 32 bits per pixel
//
if (BiosVideoPrivate->VbeModeInformationBlock->BitsPerPixel < 24) {
continue;
}
if (BiosVideoPrivate->VbeModeInformationBlock->BitsPerPixel > 32) {
continue;
}
if ((BiosVideoPrivate->VbeModeInformationBlock->BitsPerPixel % 8) != 0) {
continue;
}
//
// See if the physical base pointer for the linear mode is valid. If it isn't then try the next mode.
//
if (BiosVideoPrivate->VbeModeInformationBlock->PhysBasePtr == 0) {
continue;
}
DEBUG ((EFI_D_INFO, "Video Controller Mode 0x%x: %d x %d\n",
VbeModeNumber, BiosVideoPrivate->VbeModeInformationBlock->XResolution, BiosVideoPrivate->VbeModeInformationBlock->YResolution));
if (EdidFound && (ValidEdidTiming.ValidNumber > 0)) {
//
// EDID exist, check whether this mode match with any mode in EDID
//
Timing.HorizontalResolution = BiosVideoPrivate->VbeModeInformationBlock->XResolution;
Timing.VerticalResolution = BiosVideoPrivate->VbeModeInformationBlock->YResolution;
if (!SearchEdidTiming (&ValidEdidTiming, &Timing)) {
//
// When EDID comes from INT10 call, EDID does not include 800x600, 640x480 and 1024x768,
// but INT10 can support these modes, we add them into GOP mode.
//
if ((BiosVideoPrivate->EdidDiscovered.SizeOfEdid != 0) &&
!((Timing.HorizontalResolution) == 1024 && (Timing.VerticalResolution == 768)) &&
!((Timing.HorizontalResolution) == 800 && (Timing.VerticalResolution == 600)) &&
!((Timing.HorizontalResolution) == 640 && (Timing.VerticalResolution == 480))) {
continue;
}
}
}
//
// Select a reasonable mode to be set for current display mode
//
ModeFound = FALSE;
if (BiosVideoPrivate->VbeModeInformationBlock->XResolution == 1024 &&
BiosVideoPrivate->VbeModeInformationBlock->YResolution == 768
) {
ModeFound = TRUE;
}
if (BiosVideoPrivate->VbeModeInformationBlock->XResolution == 800 &&
BiosVideoPrivate->VbeModeInformationBlock->YResolution == 600
) {
ModeFound = TRUE;
PreferMode = ModeNumber;
}
if (BiosVideoPrivate->VbeModeInformationBlock->XResolution == 640 &&
BiosVideoPrivate->VbeModeInformationBlock->YResolution == 480
) {
ModeFound = TRUE;
}
if ((!EdidFound) && (!ModeFound)) {
//
// When no EDID exist, only select three possible resolutions, i.e. 1024x768, 800x600, 640x480
//
continue;
}
//
// Record the highest resolution mode to set later
//
if ((BiosVideoPrivate->VbeModeInformationBlock->XResolution > HighestHorizontalResolution) ||
((BiosVideoPrivate->VbeModeInformationBlock->XResolution == HighestHorizontalResolution) &&
(BiosVideoPrivate->VbeModeInformationBlock->YResolution > HighestVerticalResolution))) {
HighestHorizontalResolution = BiosVideoPrivate->VbeModeInformationBlock->XResolution;
HighestVerticalResolution = BiosVideoPrivate->VbeModeInformationBlock->YResolution;
HighestResolutionMode = ModeNumber;
}
//
// Add mode to the list of available modes
//
ModeNumber ++;
ModeBuffer = (BIOS_VIDEO_MODE_DATA *) AllocatePool (
ModeNumber * sizeof (BIOS_VIDEO_MODE_DATA)
);
if (NULL == ModeBuffer) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
if (ModeNumber > 1) {
CopyMem (
ModeBuffer,
BiosVideoPrivate->ModeData,
(ModeNumber - 1) * sizeof (BIOS_VIDEO_MODE_DATA)
);
}
if (BiosVideoPrivate->ModeData != NULL) {
FreePool (BiosVideoPrivate->ModeData);
}
CurrentModeData = &ModeBuffer[ModeNumber - 1];
CurrentModeData->VbeModeNumber = VbeModeNumber;
if (BiosVideoPrivate->VbeInformationBlock->VESAVersion >= VESA_BIOS_EXTENSIONS_VERSION_3_0) {
CurrentModeData->BytesPerScanLine = BiosVideoPrivate->VbeModeInformationBlock->LinBytesPerScanLine;
CurrentModeData->Red.Position = BiosVideoPrivate->VbeModeInformationBlock->LinRedFieldPosition;
CurrentModeData->Red.Mask = (UINT8) ((1 << BiosVideoPrivate->VbeModeInformationBlock->LinRedMaskSize) - 1);
CurrentModeData->Blue.Position = BiosVideoPrivate->VbeModeInformationBlock->LinBlueFieldPosition;
CurrentModeData->Blue.Mask = (UINT8) ((1 << BiosVideoPrivate->VbeModeInformationBlock->LinBlueMaskSize) - 1);
CurrentModeData->Green.Position = BiosVideoPrivate->VbeModeInformationBlock->LinGreenFieldPosition;
CurrentModeData->Green.Mask = (UINT8) ((1 << BiosVideoPrivate->VbeModeInformationBlock->LinGreenMaskSize) - 1);
CurrentModeData->Reserved.Position = BiosVideoPrivate->VbeModeInformationBlock->LinRsvdFieldPosition;
CurrentModeData->Reserved.Mask = (UINT8) ((1 << BiosVideoPrivate->VbeModeInformationBlock->LinRsvdMaskSize) - 1);
} else {
CurrentModeData->BytesPerScanLine = BiosVideoPrivate->VbeModeInformationBlock->BytesPerScanLine;
CurrentModeData->Red.Position = BiosVideoPrivate->VbeModeInformationBlock->RedFieldPosition;
CurrentModeData->Red.Mask = (UINT8) ((1 << BiosVideoPrivate->VbeModeInformationBlock->RedMaskSize) - 1);
CurrentModeData->Blue.Position = BiosVideoPrivate->VbeModeInformationBlock->BlueFieldPosition;
CurrentModeData->Blue.Mask = (UINT8) ((1 << BiosVideoPrivate->VbeModeInformationBlock->BlueMaskSize) - 1);
CurrentModeData->Green.Position = BiosVideoPrivate->VbeModeInformationBlock->GreenFieldPosition;
CurrentModeData->Green.Mask = (UINT8) ((1 << BiosVideoPrivate->VbeModeInformationBlock->GreenMaskSize) - 1);
CurrentModeData->Reserved.Position = BiosVideoPrivate->VbeModeInformationBlock->RsvdFieldPosition;
CurrentModeData->Reserved.Mask = (UINT8) ((1 << BiosVideoPrivate->VbeModeInformationBlock->RsvdMaskSize) - 1);
}
CurrentModeData->PixelFormat = PixelBitMask;
if ((BiosVideoPrivate->VbeModeInformationBlock->BitsPerPixel == 32) &&
(CurrentModeData->Red.Mask == 0xff) && (CurrentModeData->Green.Mask == 0xff) && (CurrentModeData->Blue.Mask == 0xff)) {
if ((CurrentModeData->Red.Position == 0) && (CurrentModeData->Green.Position == 8) && (CurrentModeData->Blue.Position == 16)) {
CurrentModeData->PixelFormat = PixelRedGreenBlueReserved8BitPerColor;
} else if ((CurrentModeData->Blue.Position == 0) && (CurrentModeData->Green.Position == 8) && (CurrentModeData->Red.Position == 16)) {
CurrentModeData->PixelFormat = PixelBlueGreenRedReserved8BitPerColor;
}
}
CurrentModeData->PixelBitMask.RedMask = ((UINT32) CurrentModeData->Red.Mask) << CurrentModeData->Red.Position;
CurrentModeData->PixelBitMask.GreenMask = ((UINT32) CurrentModeData->Green.Mask) << CurrentModeData->Green.Position;
CurrentModeData->PixelBitMask.BlueMask = ((UINT32) CurrentModeData->Blue.Mask) << CurrentModeData->Blue.Position;
CurrentModeData->PixelBitMask.ReservedMask = ((UINT32) CurrentModeData->Reserved.Mask) << CurrentModeData->Reserved.Position;
CurrentModeData->LinearFrameBuffer = (VOID *) (UINTN)BiosVideoPrivate->VbeModeInformationBlock->PhysBasePtr;
CurrentModeData->HorizontalResolution = BiosVideoPrivate->VbeModeInformationBlock->XResolution;
CurrentModeData->VerticalResolution = BiosVideoPrivate->VbeModeInformationBlock->YResolution;
CurrentModeData->BitsPerPixel = BiosVideoPrivate->VbeModeInformationBlock->BitsPerPixel;
CurrentModeData->FrameBufferSize = CurrentModeData->BytesPerScanLine * CurrentModeData->VerticalResolution;
//
// Make sure the FrameBufferSize does not exceed the max available frame buffer size reported by VEB.
//
ASSERT (CurrentModeData->FrameBufferSize <= ((UINT32)BiosVideoPrivate->VbeInformationBlock->TotalMemory * 64 * 1024));
BiosVideoPrivate->ModeData = ModeBuffer;
}
//
// Check to see if we found any modes that are compatible with GRAPHICS OUTPUT
//
if (ModeNumber == 0) {
Status = EFI_DEVICE_ERROR;
goto Done;
}
//
// Assign Gop's Blt function
//
BiosVideoPrivate->GraphicsOutput.Blt = BiosVideoGraphicsOutputVbeBlt;
BiosVideoPrivate->GraphicsOutput.Mode->MaxMode = (UINT32) ModeNumber;
//
// Current mode is unknow till now, set it to an invalid mode.
//
BiosVideoPrivate->GraphicsOutput.Mode->Mode = GRAPHICS_OUTPUT_INVALIDE_MODE_NUMBER;
//
// Find the best mode to initialize
//
if ((PcdGet32 (PcdVideoHorizontalResolution) == 0x0) || (PcdGet32 (PcdVideoVerticalResolution) == 0x0)) {
DEBUG_CODE (
BIOS_VIDEO_MODE_DATA *ModeData;
ModeData = &BiosVideoPrivate->ModeData[HighestResolutionMode];
DEBUG ((EFI_D_INFO, "BiosVideo set highest resolution %d x %d\n",
ModeData->HorizontalResolution, ModeData->VerticalResolution));
);
PreferMode = HighestResolutionMode;
}
Status = BiosVideoGraphicsOutputSetMode (&BiosVideoPrivate->GraphicsOutput, (UINT32) PreferMode);
if (EFI_ERROR (Status)) {
for (PreferMode = 0; PreferMode < ModeNumber; PreferMode ++) {
Status = BiosVideoGraphicsOutputSetMode (
&BiosVideoPrivate->GraphicsOutput,
(UINT32) PreferMode
);
if (!EFI_ERROR (Status)) {
break;
}
}
if (PreferMode == ModeNumber) {
//
// None mode is set successfully.
//
goto Done;
}
}
Done:
//
// If there was an error, then free the mode structure
//
if (EFI_ERROR (Status)) {
if (BiosVideoPrivate->ModeData != NULL) {
FreePool (BiosVideoPrivate->ModeData);
BiosVideoPrivate->ModeData = NULL;
BiosVideoPrivate->MaxMode = 0;
}
if (EdidOverrideDataBlock != NULL) {
FreePool (EdidOverrideDataBlock);
}
}
return Status;
}
/**
Check for VGA device.
@param BiosVideoPrivate Pointer to BIOS_VIDEO_DEV structure
@retval EFI_SUCCESS Standard VGA device found
**/
EFI_STATUS
BiosVideoCheckForVga (
IN OUT BIOS_VIDEO_DEV *BiosVideoPrivate
)
{
EFI_STATUS Status;
BIOS_VIDEO_MODE_DATA *ModeBuffer;
Status = EFI_UNSUPPORTED;
//
// Assign Gop's Blt function
//
BiosVideoPrivate->GraphicsOutput.Blt = BiosVideoGraphicsOutputVgaBlt;
//
// Add mode to the list of available modes
// caller should guarantee that Mode has been allocated.
//
ASSERT (BiosVideoPrivate->GraphicsOutput.Mode != NULL);
BiosVideoPrivate->GraphicsOutput.Mode->MaxMode = 1;
ModeBuffer = (BIOS_VIDEO_MODE_DATA *) AllocatePool (
sizeof (BIOS_VIDEO_MODE_DATA)
);
if (NULL == ModeBuffer) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
ModeBuffer->VbeModeNumber = 0x0012;
ModeBuffer->BytesPerScanLine = 640;
ModeBuffer->LinearFrameBuffer = (VOID *) (UINTN) (0xa0000);
ModeBuffer->HorizontalResolution = 640;
ModeBuffer->VerticalResolution = 480;
ModeBuffer->PixelFormat = PixelBltOnly;
ModeBuffer->BitsPerPixel = 8;
ModeBuffer->ColorDepth = 32;
ModeBuffer->RefreshRate = 60;
BiosVideoPrivate->ModeData = ModeBuffer;
//
// Test to see if the Video Adapter support the 640x480 16 color mode
//
BiosVideoPrivate->GraphicsOutput.Mode->Mode = GRAPHICS_OUTPUT_INVALIDE_MODE_NUMBER;
Status = BiosVideoGraphicsOutputSetMode (&BiosVideoPrivate->GraphicsOutput, 0);
Done:
//
// If there was an error, then free the mode structure
//
if (EFI_ERROR (Status)) {
if (BiosVideoPrivate->ModeData != NULL) {
FreePool (BiosVideoPrivate->ModeData);
BiosVideoPrivate->ModeData = NULL;
}
if (BiosVideoPrivate->GraphicsOutput.Mode != NULL) {
if (BiosVideoPrivate->GraphicsOutput.Mode->Info != NULL) {
FreePool (BiosVideoPrivate->GraphicsOutput.Mode->Info);
BiosVideoPrivate->GraphicsOutput.Mode->Info = NULL;
}
FreePool (BiosVideoPrivate->GraphicsOutput.Mode);
BiosVideoPrivate->GraphicsOutput.Mode = NULL;
}
}
return Status;
}
//
// Graphics Output Protocol Member Functions for VESA BIOS Extensions
//
/**
Graphics Output protocol interface to get video mode.
@param This Protocol instance pointer.
@param ModeNumber The mode number to return information on.
@param SizeOfInfo A pointer to the size, in bytes, of the Info
buffer.
@param Info Caller allocated buffer that returns information
about ModeNumber.
@retval EFI_SUCCESS Mode information returned.
@retval EFI_DEVICE_ERROR A hardware error occurred trying to retrieve the
video mode.
@retval EFI_NOT_STARTED Video display is not initialized. Call SetMode ()
@retval EFI_INVALID_PARAMETER One of the input args was NULL.
**/
EFI_STATUS
EFIAPI
BiosVideoGraphicsOutputQueryMode (
IN EFI_GRAPHICS_OUTPUT_PROTOCOL *This,
IN UINT32 ModeNumber,
OUT UINTN *SizeOfInfo,
OUT EFI_GRAPHICS_OUTPUT_MODE_INFORMATION **Info
)
{
BIOS_VIDEO_DEV *BiosVideoPrivate;
BIOS_VIDEO_MODE_DATA *ModeData;
BiosVideoPrivate = BIOS_VIDEO_DEV_FROM_GRAPHICS_OUTPUT_THIS (This);
if (BiosVideoPrivate->HardwareNeedsStarting) {
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_ERROR_CODE | EFI_ERROR_MINOR,
EFI_PERIPHERAL_LOCAL_CONSOLE | EFI_P_EC_OUTPUT_ERROR,
BiosVideoPrivate->GopDevicePath
);
return EFI_NOT_STARTED;
}
if (This == NULL || Info == NULL || SizeOfInfo == NULL || ModeNumber >= This->Mode->MaxMode) {
return EFI_INVALID_PARAMETER;
}
*Info = (EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *) AllocatePool (
sizeof (EFI_GRAPHICS_OUTPUT_MODE_INFORMATION)
);
if (NULL == *Info) {
return EFI_OUT_OF_RESOURCES;
}
*SizeOfInfo = sizeof (EFI_GRAPHICS_OUTPUT_MODE_INFORMATION);
ModeData = &BiosVideoPrivate->ModeData[ModeNumber];
(*Info)->Version = 0;
(*Info)->HorizontalResolution = ModeData->HorizontalResolution;
(*Info)->VerticalResolution = ModeData->VerticalResolution;
(*Info)->PixelFormat = ModeData->PixelFormat;
CopyMem (&((*Info)->PixelInformation), &(ModeData->PixelBitMask), sizeof(ModeData->PixelBitMask));
(*Info)->PixelsPerScanLine = (ModeData->BytesPerScanLine * 8) / ModeData->BitsPerPixel;
return EFI_SUCCESS;
}
/**
Worker function to set video mode.
@param BiosVideoPrivate Instance of BIOS_VIDEO_DEV.
@param ModeData The mode data to be set.
@param DevicePath Pointer to Device Path Protocol.
@retval EFI_SUCCESS Graphics mode was changed.
@retval EFI_DEVICE_ERROR The device had an error and could not complete the
request.
@retval EFI_UNSUPPORTED ModeNumber is not supported by this device.
**/
EFI_STATUS
BiosVideoSetModeWorker (
IN BIOS_VIDEO_DEV *BiosVideoPrivate,
IN BIOS_VIDEO_MODE_DATA *ModeData,
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath
)
{
EFI_STATUS Status;
EFI_IA32_REGISTER_SET Regs;
if (BiosVideoPrivate->LineBuffer != NULL) {
FreePool (BiosVideoPrivate->LineBuffer);
}
if (BiosVideoPrivate->VgaFrameBuffer != NULL) {
FreePool (BiosVideoPrivate->VgaFrameBuffer);
}
if (BiosVideoPrivate->VbeFrameBuffer != NULL) {
FreePool (BiosVideoPrivate->VbeFrameBuffer);
}
BiosVideoPrivate->LineBuffer = (UINT8 *) AllocatePool (
ModeData->BytesPerScanLine
);
if (NULL == BiosVideoPrivate->LineBuffer) {
return EFI_OUT_OF_RESOURCES;
}
//
// Clear all registers
//
ZeroMem (&Regs, sizeof (Regs));
if (ModeData->VbeModeNumber < 0x100) {
//
// Allocate a working buffer for BLT operations to the VGA frame buffer
//
BiosVideoPrivate->VgaFrameBuffer = (UINT8 *) AllocatePool (4 * 480 * 80);
if (NULL == BiosVideoPrivate->VgaFrameBuffer) {
return EFI_OUT_OF_RESOURCES;
}
//
// Set VGA Mode
//
Regs.X.AX = ModeData->VbeModeNumber;
BiosVideoPrivate->LegacyBios->Int86 (BiosVideoPrivate->LegacyBios, 0x10, &Regs);
} else {
//
// Allocate a working buffer for BLT operations to the VBE frame buffer
//
BiosVideoPrivate->VbeFrameBuffer =
(EFI_GRAPHICS_OUTPUT_BLT_PIXEL *) AllocatePool (
ModeData->BytesPerScanLine * ModeData->VerticalResolution
);
if (NULL == BiosVideoPrivate->VbeFrameBuffer) {
return EFI_OUT_OF_RESOURCES;
}
//
// Set VBE mode
//
Regs.X.AX = VESA_BIOS_EXTENSIONS_SET_MODE;
Regs.X.BX = (UINT16) (ModeData->VbeModeNumber | VESA_BIOS_EXTENSIONS_MODE_NUMBER_LINEAR_FRAME_BUFFER);
ZeroMem (BiosVideoPrivate->VbeCrtcInformationBlock, sizeof (VESA_BIOS_EXTENSIONS_CRTC_INFORMATION_BLOCK));
Regs.X.ES = EFI_SEGMENT ((UINTN) BiosVideoPrivate->VbeCrtcInformationBlock);
Regs.X.DI = EFI_OFFSET ((UINTN) BiosVideoPrivate->VbeCrtcInformationBlock);
BiosVideoPrivate->LegacyBios->Int86 (BiosVideoPrivate->LegacyBios, 0x10, &Regs);
//
// Check to see if the call succeeded
//
if (Regs.X.AX != VESA_BIOS_EXTENSIONS_STATUS_SUCCESS) {
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_ERROR_CODE | EFI_ERROR_MINOR,
EFI_PERIPHERAL_LOCAL_CONSOLE | EFI_P_EC_OUTPUT_ERROR,
DevicePath
);
return EFI_DEVICE_ERROR;
}
//
// Initialize the state of the VbeFrameBuffer
//
Status = BiosVideoPrivate->PciIo->Mem.Read (
BiosVideoPrivate->PciIo,
EfiPciIoWidthUint32,
EFI_PCI_IO_PASS_THROUGH_BAR,
(UINT64) (UINTN) ModeData->LinearFrameBuffer,
(ModeData->BytesPerScanLine * ModeData->VerticalResolution) >> 2,
BiosVideoPrivate->VbeFrameBuffer
);
if (EFI_ERROR (Status)) {
return Status;
}
}
return EFI_SUCCESS;
}
/**
Graphics Output protocol interface to set video mode.
@param This Protocol instance pointer.
@param ModeNumber The mode number to be set.
@retval EFI_SUCCESS Graphics mode was changed.
@retval EFI_DEVICE_ERROR The device had an error and could not complete the
request.
@retval EFI_UNSUPPORTED ModeNumber is not supported by this device.
**/
EFI_STATUS
EFIAPI
BiosVideoGraphicsOutputSetMode (
IN EFI_GRAPHICS_OUTPUT_PROTOCOL * This,
IN UINT32 ModeNumber
)
{
EFI_STATUS Status;
BIOS_VIDEO_DEV *BiosVideoPrivate;
BIOS_VIDEO_MODE_DATA *ModeData;
EFI_GRAPHICS_OUTPUT_BLT_PIXEL Background;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
BiosVideoPrivate = BIOS_VIDEO_DEV_FROM_GRAPHICS_OUTPUT_THIS (This);
ModeData = &BiosVideoPrivate->ModeData[ModeNumber];
if (ModeNumber >= This->Mode->MaxMode) {
return EFI_UNSUPPORTED;
}
if (ModeNumber == This->Mode->Mode) {
//
// Clear screen to black
//
ZeroMem (&Background, sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL));
BiosVideoGraphicsOutputVbeBlt (
This,
&Background,
EfiBltVideoFill,
0,
0,
0,
0,
ModeData->HorizontalResolution,
ModeData->VerticalResolution,
0
);
return EFI_SUCCESS;
}
Status = BiosVideoSetModeWorker (BiosVideoPrivate, ModeData, BiosVideoPrivate->GopDevicePath);
if (EFI_ERROR (Status)) {
return Status;
}
This->Mode->Mode = ModeNumber;
This->Mode->Info->Version = 0;
This->Mode->Info->HorizontalResolution = ModeData->HorizontalResolution;
This->Mode->Info->VerticalResolution = ModeData->VerticalResolution;
This->Mode->Info->PixelFormat = ModeData->PixelFormat;
CopyMem (&(This->Mode->Info->PixelInformation), &(ModeData->PixelBitMask), sizeof (ModeData->PixelBitMask));
This->Mode->Info->PixelsPerScanLine = (ModeData->BytesPerScanLine * 8) / ModeData->BitsPerPixel;
This->Mode->SizeOfInfo = sizeof(EFI_GRAPHICS_OUTPUT_MODE_INFORMATION);
This->Mode->FrameBufferSize = ModeData->FrameBufferSize;
This->Mode->FrameBufferBase = (EFI_PHYSICAL_ADDRESS) (UINTN) ModeData->LinearFrameBuffer;
BiosVideoPrivate->HardwareNeedsStarting = FALSE;
return EFI_SUCCESS;
}
/**
Update physical frame buffer, copy 4 bytes block, then copy remaining bytes.
@param PciIo The pointer of EFI_PCI_IO_PROTOCOL
@param VbeBuffer The data to transfer to screen
@param MemAddress Physical frame buffer base address
@param DestinationX The X coordinate of the destination for BltOperation
@param DestinationY The Y coordinate of the destination for BltOperation
@param TotalBytes The total bytes of copy
@param VbePixelWidth Bytes per pixel
@param BytesPerScanLine Bytes per scan line
**/
VOID
CopyVideoBuffer (
IN EFI_PCI_IO_PROTOCOL *PciIo,
IN UINT8 *VbeBuffer,
IN VOID *MemAddress,
IN UINTN DestinationX,
IN UINTN DestinationY,
IN UINTN TotalBytes,
IN UINT32 VbePixelWidth,
IN UINTN BytesPerScanLine
)
{
UINTN FrameBufferAddr;
UINTN CopyBlockNum;
UINTN RemainingBytes;
UINTN UnalignedBytes;
EFI_STATUS Status;
FrameBufferAddr = (UINTN) MemAddress + (DestinationY * BytesPerScanLine) + DestinationX * VbePixelWidth;
//
// If TotalBytes is less than 4 bytes, only start byte copy.
//
if (TotalBytes < 4) {
Status = PciIo->Mem.Write (
PciIo,
EfiPciIoWidthUint8,
EFI_PCI_IO_PASS_THROUGH_BAR,
(UINT64) FrameBufferAddr,
TotalBytes,
VbeBuffer
);
ASSERT_EFI_ERROR (Status);
return;
}
//
// If VbeBuffer is not 4-byte aligned, start byte copy.
//
UnalignedBytes = (4 - ((UINTN) VbeBuffer & 0x3)) & 0x3;
if (UnalignedBytes != 0) {
Status = PciIo->Mem.Write (
PciIo,
EfiPciIoWidthUint8,
EFI_PCI_IO_PASS_THROUGH_BAR,
(UINT64) FrameBufferAddr,
UnalignedBytes,
VbeBuffer
);
ASSERT_EFI_ERROR (Status);
FrameBufferAddr += UnalignedBytes;
VbeBuffer += UnalignedBytes;
}
//
// Calculate 4-byte block count and remaining bytes.
//
CopyBlockNum = (TotalBytes - UnalignedBytes) >> 2;
RemainingBytes = (TotalBytes - UnalignedBytes) & 3;
//
// Copy 4-byte block and remaining bytes to physical frame buffer.
//
if (CopyBlockNum != 0) {
Status = PciIo->Mem.Write (
PciIo,
EfiPciIoWidthUint32,
EFI_PCI_IO_PASS_THROUGH_BAR,
(UINT64) FrameBufferAddr,
CopyBlockNum,
VbeBuffer
);
ASSERT_EFI_ERROR (Status);
}
if (RemainingBytes != 0) {
FrameBufferAddr += (CopyBlockNum << 2);
VbeBuffer += (CopyBlockNum << 2);
Status = PciIo->Mem.Write (
PciIo,
EfiPciIoWidthUint8,
EFI_PCI_IO_PASS_THROUGH_BAR,
(UINT64) FrameBufferAddr,
RemainingBytes,
VbeBuffer
);
ASSERT_EFI_ERROR (Status);
}
}
/**
Worker function to block transfer for VBE device.
@param BiosVideoPrivate Instance of BIOS_VIDEO_DEV
@param BltBuffer The data to transfer to screen
@param BltOperation The operation to perform
@param SourceX The X coordinate of the source for BltOperation
@param SourceY The Y coordinate of the source for BltOperation
@param DestinationX The X coordinate of the destination for
BltOperation
@param DestinationY The Y coordinate of the destination for
BltOperation
@param Width The width of a rectangle in the blt rectangle in
pixels
@param Height The height of a rectangle in the blt rectangle in
pixels
@param Delta Not used for EfiBltVideoFill and
EfiBltVideoToVideo operation. If a Delta of 0 is
used, the entire BltBuffer will be operated on. If
a subrectangle of the BltBuffer is used, then
Delta represents the number of bytes in a row of
the BltBuffer.
@param Mode Mode data.
@retval EFI_INVALID_PARAMETER Invalid parameter passed in
@retval EFI_SUCCESS Blt operation success
**/
EFI_STATUS
BiosVideoVbeBltWorker (
IN BIOS_VIDEO_DEV *BiosVideoPrivate,
IN EFI_GRAPHICS_OUTPUT_BLT_PIXEL *BltBuffer, OPTIONAL
IN EFI_GRAPHICS_OUTPUT_BLT_OPERATION BltOperation,
IN UINTN SourceX,
IN UINTN SourceY,
IN UINTN DestinationX,
IN UINTN DestinationY,
IN UINTN Width,
IN UINTN Height,
IN UINTN Delta,
IN BIOS_VIDEO_MODE_DATA *Mode
)
{
EFI_PCI_IO_PROTOCOL *PciIo;
EFI_TPL OriginalTPL;
UINTN DstY;
UINTN SrcY;
UINTN DstX;
EFI_GRAPHICS_OUTPUT_BLT_PIXEL *Blt;
VOID *MemAddress;
EFI_GRAPHICS_OUTPUT_BLT_PIXEL *VbeFrameBuffer;
UINTN BytesPerScanLine;
UINTN Index;
UINT8 *VbeBuffer;
UINT8 *VbeBuffer1;
UINT8 *BltUint8;
UINT32 VbePixelWidth;
UINT32 Pixel;
UINTN TotalBytes;
PciIo = BiosVideoPrivate->PciIo;
VbeFrameBuffer = BiosVideoPrivate->VbeFrameBuffer;
MemAddress = Mode->LinearFrameBuffer;
BytesPerScanLine = Mode->BytesPerScanLine;
VbePixelWidth = Mode->BitsPerPixel / 8;
BltUint8 = (UINT8 *) BltBuffer;
TotalBytes = Width * VbePixelWidth;
if (((UINTN) BltOperation) >= EfiGraphicsOutputBltOperationMax) {
return EFI_INVALID_PARAMETER;
}
if (Width == 0 || Height == 0) {
return EFI_INVALID_PARAMETER;
}
//
// We need to fill the Virtual Screen buffer with the blt data.
// The virtual screen is upside down, as the first row is the bootom row of
// the image.
//
if (BltOperation == EfiBltVideoToBltBuffer) {
//
// Video to BltBuffer: Source is Video, destination is BltBuffer
//
if (SourceY + Height > Mode->VerticalResolution) {
return EFI_INVALID_PARAMETER;
}
if (SourceX + Width > Mode->HorizontalResolution) {
return EFI_INVALID_PARAMETER;
}
} else {
//
// BltBuffer to Video: Source is BltBuffer, destination is Video
//
if (DestinationY + Height > Mode->VerticalResolution) {
return EFI_INVALID_PARAMETER;
}
if (DestinationX + Width > Mode->HorizontalResolution) {
return EFI_INVALID_PARAMETER;
}
}
//
// If Delta is zero, then the entire BltBuffer is being used, so Delta
// is the number of bytes in each row of BltBuffer. Since BltBuffer is Width pixels size,
// the number of bytes in each row can be computed.
//
if (Delta == 0) {
Delta = Width * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL);
}
//
// We have to raise to TPL Notify, so we make an atomic write the frame buffer.
// We would not want a timer based event (Cursor, ...) to come in while we are
// doing this operation.
//
OriginalTPL = gBS->RaiseTPL (TPL_NOTIFY);
switch (BltOperation) {
case EfiBltVideoToBltBuffer:
for (SrcY = SourceY, DstY = DestinationY; DstY < (Height + DestinationY); SrcY++, DstY++) {
Blt = (EFI_GRAPHICS_OUTPUT_BLT_PIXEL *) (BltUint8 + DstY * Delta + DestinationX * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL));
//
// Shuffle the packed bytes in the hardware buffer to match EFI_GRAPHICS_OUTPUT_BLT_PIXEL
//
VbeBuffer = ((UINT8 *) VbeFrameBuffer + (SrcY * BytesPerScanLine + SourceX * VbePixelWidth));
for (DstX = DestinationX; DstX < (Width + DestinationX); DstX++) {
Pixel = VbeBuffer[0] | VbeBuffer[1] << 8 | VbeBuffer[2] << 16 | VbeBuffer[3] << 24;
Blt->Red = (UINT8) ((Pixel >> Mode->Red.Position) & Mode->Red.Mask);
Blt->Blue = (UINT8) ((Pixel >> Mode->Blue.Position) & Mode->Blue.Mask);
Blt->Green = (UINT8) ((Pixel >> Mode->Green.Position) & Mode->Green.Mask);
Blt->Reserved = 0;
Blt++;
VbeBuffer += VbePixelWidth;
}
}
break;
case EfiBltVideoToVideo:
for (Index = 0; Index < Height; Index++) {
if (DestinationY <= SourceY) {
SrcY = SourceY + Index;
DstY = DestinationY + Index;
} else {
SrcY = SourceY + Height - Index - 1;
DstY = DestinationY + Height - Index - 1;
}
VbeBuffer = ((UINT8 *) VbeFrameBuffer + DstY * BytesPerScanLine + DestinationX * VbePixelWidth);
VbeBuffer1 = ((UINT8 *) VbeFrameBuffer + SrcY * BytesPerScanLine + SourceX * VbePixelWidth);
gBS->CopyMem (
VbeBuffer,
VbeBuffer1,
TotalBytes
);
//
// Update physical frame buffer.
//
CopyVideoBuffer (
PciIo,
VbeBuffer,
MemAddress,
DestinationX,
DstY,
TotalBytes,
VbePixelWidth,
BytesPerScanLine
);
}
break;
case EfiBltVideoFill:
VbeBuffer = (UINT8 *) ((UINTN) VbeFrameBuffer + (DestinationY * BytesPerScanLine) + DestinationX * VbePixelWidth);
Blt = (EFI_GRAPHICS_OUTPUT_BLT_PIXEL *) BltUint8;
//
// Shuffle the RGB fields in EFI_GRAPHICS_OUTPUT_BLT_PIXEL to match the hardware buffer
//
Pixel = ((Blt->Red & Mode->Red.Mask) << Mode->Red.Position) |
(
(Blt->Green & Mode->Green.Mask) <<
Mode->Green.Position
) |
((Blt->Blue & Mode->Blue.Mask) << Mode->Blue.Position);
for (Index = 0; Index < Width; Index++) {
gBS->CopyMem (
VbeBuffer,
&Pixel,
VbePixelWidth
);
VbeBuffer += VbePixelWidth;
}
VbeBuffer = (UINT8 *) ((UINTN) VbeFrameBuffer + (DestinationY * BytesPerScanLine) + DestinationX * VbePixelWidth);
for (DstY = DestinationY + 1; DstY < (Height + DestinationY); DstY++) {
gBS->CopyMem (
(VOID *) ((UINTN) VbeFrameBuffer + (DstY * BytesPerScanLine) + DestinationX * VbePixelWidth),
VbeBuffer,
TotalBytes
);
}
for (DstY = DestinationY; DstY < (Height + DestinationY); DstY++) {
//
// Update physical frame buffer.
//
CopyVideoBuffer (
PciIo,
VbeBuffer,
MemAddress,
DestinationX,
DstY,
TotalBytes,
VbePixelWidth,
BytesPerScanLine
);
}
break;
case EfiBltBufferToVideo:
for (SrcY = SourceY, DstY = DestinationY; SrcY < (Height + SourceY); SrcY++, DstY++) {
Blt = (EFI_GRAPHICS_OUTPUT_BLT_PIXEL *) (BltUint8 + (SrcY * Delta) + (SourceX) * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL));
VbeBuffer = ((UINT8 *) VbeFrameBuffer + (DstY * BytesPerScanLine + DestinationX * VbePixelWidth));
for (DstX = DestinationX; DstX < (Width + DestinationX); DstX++) {
//
// Shuffle the RGB fields in EFI_GRAPHICS_OUTPUT_BLT_PIXEL to match the hardware buffer
//
Pixel = ((Blt->Red & Mode->Red.Mask) << Mode->Red.Position) |
((Blt->Green & Mode->Green.Mask) << Mode->Green.Position) |
((Blt->Blue & Mode->Blue.Mask) << Mode->Blue.Position);
gBS->CopyMem (
VbeBuffer,
&Pixel,
VbePixelWidth
);
Blt++;
VbeBuffer += VbePixelWidth;
}
VbeBuffer = ((UINT8 *) VbeFrameBuffer + (DstY * BytesPerScanLine + DestinationX * VbePixelWidth));
//
// Update physical frame buffer.
//
CopyVideoBuffer (
PciIo,
VbeBuffer,
MemAddress,
DestinationX,
DstY,
TotalBytes,
VbePixelWidth,
BytesPerScanLine
);
}
break;
default: ;
}
gBS->RestoreTPL (OriginalTPL);
return EFI_SUCCESS;
}
/**
Graphics Output protocol instance to block transfer for VBE device.
@param This Pointer to Graphics Output protocol instance
@param BltBuffer The data to transfer to screen
@param BltOperation The operation to perform
@param SourceX The X coordinate of the source for BltOperation
@param SourceY The Y coordinate of the source for BltOperation
@param DestinationX The X coordinate of the destination for
BltOperation
@param DestinationY The Y coordinate of the destination for
BltOperation
@param Width The width of a rectangle in the blt rectangle in
pixels
@param Height The height of a rectangle in the blt rectangle in
pixels
@param Delta Not used for EfiBltVideoFill and
EfiBltVideoToVideo operation. If a Delta of 0 is
used, the entire BltBuffer will be operated on. If
a subrectangle of the BltBuffer is used, then
Delta represents the number of bytes in a row of
the BltBuffer.
@retval EFI_INVALID_PARAMETER Invalid parameter passed in
@retval EFI_SUCCESS Blt operation success
**/
EFI_STATUS
EFIAPI
BiosVideoGraphicsOutputVbeBlt (
IN EFI_GRAPHICS_OUTPUT_PROTOCOL *This,
IN EFI_GRAPHICS_OUTPUT_BLT_PIXEL *BltBuffer, OPTIONAL
IN EFI_GRAPHICS_OUTPUT_BLT_OPERATION BltOperation,
IN UINTN SourceX,
IN UINTN SourceY,
IN UINTN DestinationX,
IN UINTN DestinationY,
IN UINTN Width,
IN UINTN Height,
IN UINTN Delta
)
{
BIOS_VIDEO_DEV *BiosVideoPrivate;
BIOS_VIDEO_MODE_DATA *Mode;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
BiosVideoPrivate = BIOS_VIDEO_DEV_FROM_GRAPHICS_OUTPUT_THIS (This);
Mode = &BiosVideoPrivate->ModeData[This->Mode->Mode];
return BiosVideoVbeBltWorker (
BiosVideoPrivate,
BltBuffer,
BltOperation,
SourceX,
SourceY,
DestinationX,
DestinationY,
Width,
Height,
Delta,
Mode
);
}
/**
Write graphics controller registers.
@param PciIo Pointer to PciIo protocol instance of the
controller
@param Address Register address
@param Data Data to be written to register
@return None
**/
VOID
WriteGraphicsController (
IN EFI_PCI_IO_PROTOCOL *PciIo,
IN UINTN Address,
IN UINTN Data
)
{
Address = Address | (Data << 8);
PciIo->Io.Write (
PciIo,
EfiPciIoWidthUint16,
EFI_PCI_IO_PASS_THROUGH_BAR,
VGA_GRAPHICS_CONTROLLER_ADDRESS_REGISTER,
1,
&Address
);
}
/**
Read the four bit plane of VGA frame buffer.
@param PciIo Pointer to PciIo protocol instance of the
controller
@param HardwareBuffer Hardware VGA frame buffer address
@param MemoryBuffer Memory buffer address
@param WidthInBytes Number of bytes in a line to read
@param Height Height of the area to read
@return None
**/
VOID
VgaReadBitPlanes (
EFI_PCI_IO_PROTOCOL *PciIo,
UINT8 *HardwareBuffer,
UINT8 *MemoryBuffer,
UINTN WidthInBytes,
UINTN Height
)
{
UINTN BitPlane;
UINTN Rows;
UINTN FrameBufferOffset;
UINT8 *Source;
UINT8 *Destination;
//
// Program the Mode Register Write mode 0, Read mode 0
//
WriteGraphicsController (
PciIo,
VGA_GRAPHICS_CONTROLLER_MODE_REGISTER,
VGA_GRAPHICS_CONTROLLER_READ_MODE_0 | VGA_GRAPHICS_CONTROLLER_WRITE_MODE_0
);
for (BitPlane = 0, FrameBufferOffset = 0;
BitPlane < VGA_NUMBER_OF_BIT_PLANES;
BitPlane++, FrameBufferOffset += VGA_BYTES_PER_BIT_PLANE
) {
//
// Program the Read Map Select Register to select the correct bit plane
//
WriteGraphicsController (
PciIo,
VGA_GRAPHICS_CONTROLLER_READ_MAP_SELECT_REGISTER,
BitPlane
);
Source = HardwareBuffer;
Destination = MemoryBuffer + FrameBufferOffset;
for (Rows = 0; Rows < Height; Rows++, Source += VGA_BYTES_PER_SCAN_LINE, Destination += VGA_BYTES_PER_SCAN_LINE) {
PciIo->Mem.Read (
PciIo,
EfiPciIoWidthUint8,
EFI_PCI_IO_PASS_THROUGH_BAR,
(UINT64) (UINTN) Source,
WidthInBytes,
(VOID *) Destination
);
}
}
}
/**
Internal routine to convert VGA color to Grahpics Output color.
@param MemoryBuffer Buffer containing VGA color
@param CoordinateX The X coordinate of pixel on screen
@param CoordinateY The Y coordinate of pixel on screen
@param BltBuffer Buffer to contain converted Grahpics Output color
@return None
**/
VOID
VgaConvertToGraphicsOutputColor (
UINT8 *MemoryBuffer,
UINTN CoordinateX,
UINTN CoordinateY,
EFI_GRAPHICS_OUTPUT_BLT_PIXEL *BltBuffer
)
{
UINTN Mask;
UINTN Bit;
UINTN Color;
MemoryBuffer += ((CoordinateY << 6) + (CoordinateY << 4) + (CoordinateX >> 3));
Mask = mVgaBitMaskTable[CoordinateX & 0x07];
for (Bit = 0x01, Color = 0; Bit < 0x10; Bit <<= 1, MemoryBuffer += VGA_BYTES_PER_BIT_PLANE) {
if ((*MemoryBuffer & Mask) != 0) {
Color |= Bit;
}
}
*BltBuffer = mVgaColorToGraphicsOutputColor[Color];
}
/**
Internal routine to convert Grahpics Output color to VGA color.
@param BltBuffer buffer containing Grahpics Output color
@return Converted VGA color
**/
UINT8
VgaConvertColor (
IN EFI_GRAPHICS_OUTPUT_BLT_PIXEL *BltBuffer
)
{
UINT8 Color;
Color = (UINT8) ((BltBuffer->Blue >> 7) | ((BltBuffer->Green >> 6) & 0x02) | ((BltBuffer->Red >> 5) & 0x04));
if ((BltBuffer->Red + BltBuffer->Green + BltBuffer->Blue) > 0x180) {
Color |= 0x08;
}
return Color;
}
/**
Grahpics Output protocol instance to block transfer for VGA device.
@param This Pointer to Grahpics Output protocol instance
@param BltBuffer The data to transfer to screen
@param BltOperation The operation to perform
@param SourceX The X coordinate of the source for BltOperation
@param SourceY The Y coordinate of the source for BltOperation
@param DestinationX The X coordinate of the destination for
BltOperation
@param DestinationY The Y coordinate of the destination for
BltOperation
@param Width The width of a rectangle in the blt rectangle in
pixels
@param Height The height of a rectangle in the blt rectangle in
pixels
@param Delta Not used for EfiBltVideoFill and
EfiBltVideoToVideo operation. If a Delta of 0 is
used, the entire BltBuffer will be operated on. If
a subrectangle of the BltBuffer is used, then
Delta represents the number of bytes in a row of
the BltBuffer.
@retval EFI_INVALID_PARAMETER Invalid parameter passed in
@retval EFI_SUCCESS Blt operation success
**/
EFI_STATUS
EFIAPI
BiosVideoGraphicsOutputVgaBlt (
IN EFI_GRAPHICS_OUTPUT_PROTOCOL *This,
IN EFI_GRAPHICS_OUTPUT_BLT_PIXEL *BltBuffer, OPTIONAL
IN EFI_GRAPHICS_OUTPUT_BLT_OPERATION BltOperation,
IN UINTN SourceX,
IN UINTN SourceY,
IN UINTN DestinationX,
IN UINTN DestinationY,
IN UINTN Width,
IN UINTN Height,
IN UINTN Delta
)
{
BIOS_VIDEO_DEV *BiosVideoPrivate;
EFI_TPL OriginalTPL;
UINT8 *MemAddress;
UINTN BytesPerScanLine;
UINTN Bit;
UINTN Index;
UINTN Index1;
UINTN StartAddress;
UINTN Bytes;
UINTN Offset;
UINT8 LeftMask;
UINT8 RightMask;
UINTN Address;
UINTN AddressFix;
UINT8 *Address1;
UINT8 *SourceAddress;
UINT8 *DestinationAddress;
EFI_PCI_IO_PROTOCOL *PciIo;
UINT8 Data;
UINT8 PixelColor;
UINT8 *VgaFrameBuffer;
UINTN SourceOffset;
UINTN SourceWidth;
UINTN Rows;
UINTN Columns;
UINTN CoordinateX;
UINTN CoordinateY;
UINTN CurrentMode;
if (This == NULL || ((UINTN) BltOperation) >= EfiGraphicsOutputBltOperationMax) {
return EFI_INVALID_PARAMETER;
}
BiosVideoPrivate = BIOS_VIDEO_DEV_FROM_GRAPHICS_OUTPUT_THIS (This);
CurrentMode = This->Mode->Mode;
PciIo = BiosVideoPrivate->PciIo;
MemAddress = BiosVideoPrivate->ModeData[CurrentMode].LinearFrameBuffer;
BytesPerScanLine = BiosVideoPrivate->ModeData[CurrentMode].BytesPerScanLine >> 3;
VgaFrameBuffer = BiosVideoPrivate->VgaFrameBuffer;
if (Width == 0 || Height == 0) {
return EFI_INVALID_PARAMETER;
}
//
// We need to fill the Virtual Screen buffer with the blt data.
// The virtual screen is upside down, as the first row is the bootom row of
// the image.
//
if (BltOperation == EfiBltVideoToBltBuffer) {
//
// Video to BltBuffer: Source is Video, destination is BltBuffer
//
if (SourceY + Height > BiosVideoPrivate->ModeData[CurrentMode].VerticalResolution) {
return EFI_INVALID_PARAMETER;
}
if (SourceX + Width > BiosVideoPrivate->ModeData[CurrentMode].HorizontalResolution) {
return EFI_INVALID_PARAMETER;
}
} else {
//
// BltBuffer to Video: Source is BltBuffer, destination is Video
//
if (DestinationY + Height > BiosVideoPrivate->ModeData[CurrentMode].VerticalResolution) {
return EFI_INVALID_PARAMETER;
}
if (DestinationX + Width > BiosVideoPrivate->ModeData[CurrentMode].HorizontalResolution) {
return EFI_INVALID_PARAMETER;
}
}
//
// If Delta is zero, then the entire BltBuffer is being used, so Delta
// is the number of bytes in each row of BltBuffer. Since BltBuffer is Width pixels size,
// the number of bytes in each row can be computed.
//
if (Delta == 0) {
Delta = Width * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL);
}
//
// We have to raise to TPL Notify, so we make an atomic write the frame buffer.
// We would not want a timer based event (Cursor, ...) to come in while we are
// doing this operation.
//
OriginalTPL = gBS->RaiseTPL (TPL_NOTIFY);
//
// Compute some values we need for VGA
//
switch (BltOperation) {
case EfiBltVideoToBltBuffer:
SourceOffset = (SourceY << 6) + (SourceY << 4) + (SourceX >> 3);
SourceWidth = ((SourceX + Width - 1) >> 3) - (SourceX >> 3) + 1;
//
// Read all the pixels in the 4 bit planes into a memory buffer that looks like the VGA buffer
//
VgaReadBitPlanes (
PciIo,
MemAddress + SourceOffset,
VgaFrameBuffer + SourceOffset,
SourceWidth,
Height
);
//
// Convert VGA Bit Planes to a Graphics Output 32-bit color value
//
BltBuffer += (DestinationY * (Delta >> 2) + DestinationX);
for (Rows = 0, CoordinateY = SourceY; Rows < Height; Rows++, CoordinateY++, BltBuffer += (Delta >> 2)) {
for (Columns = 0, CoordinateX = SourceX; Columns < Width; Columns++, CoordinateX++, BltBuffer++) {
VgaConvertToGraphicsOutputColor (VgaFrameBuffer, CoordinateX, CoordinateY, BltBuffer);
}
BltBuffer -= Width;
}
break;
case EfiBltVideoToVideo:
//
// Check for an aligned Video to Video operation
//
if ((SourceX & 0x07) == 0x00 && (DestinationX & 0x07) == 0x00 && (Width & 0x07) == 0x00) {
//
// Program the Mode Register Write mode 1, Read mode 0
//
WriteGraphicsController (
PciIo,
VGA_GRAPHICS_CONTROLLER_MODE_REGISTER,
VGA_GRAPHICS_CONTROLLER_READ_MODE_0 | VGA_GRAPHICS_CONTROLLER_WRITE_MODE_1
);
SourceAddress = (UINT8 *) (MemAddress + (SourceY << 6) + (SourceY << 4) + (SourceX >> 3));
DestinationAddress = (UINT8 *) (MemAddress + (DestinationY << 6) + (DestinationY << 4) + (DestinationX >> 3));
Bytes = Width >> 3;
for (Index = 0, Offset = 0; Index < Height; Index++, Offset += BytesPerScanLine) {
PciIo->CopyMem (
PciIo,
EfiPciIoWidthUint8,
EFI_PCI_IO_PASS_THROUGH_BAR,
(UINT64) (UINTN) (DestinationAddress + Offset),
EFI_PCI_IO_PASS_THROUGH_BAR,
(UINT64) (UINTN) (SourceAddress + Offset),
Bytes
);
}
} else {
SourceOffset = (SourceY << 6) + (SourceY << 4) + (SourceX >> 3);
SourceWidth = ((SourceX + Width - 1) >> 3) - (SourceX >> 3) + 1;
//
// Read all the pixels in the 4 bit planes into a memory buffer that looks like the VGA buffer
//
VgaReadBitPlanes (
PciIo,
MemAddress + SourceOffset,
VgaFrameBuffer + SourceOffset,
SourceWidth,
Height
);
}
break;
case EfiBltVideoFill:
StartAddress = (UINTN) (MemAddress + (DestinationY << 6) + (DestinationY << 4) + (DestinationX >> 3));
Bytes = ((DestinationX + Width - 1) >> 3) - (DestinationX >> 3);
LeftMask = mVgaLeftMaskTable[DestinationX & 0x07];
RightMask = mVgaRightMaskTable[(DestinationX + Width - 1) & 0x07];
if (Bytes == 0) {
LeftMask = (UINT8) (LeftMask & RightMask);
RightMask = 0;
}
if (LeftMask == 0xff) {
StartAddress--;
Bytes++;
LeftMask = 0;
}
if (RightMask == 0xff) {
Bytes++;
RightMask = 0;
}
PixelColor = VgaConvertColor (BltBuffer);
//
// Program the Mode Register Write mode 2, Read mode 0
//
WriteGraphicsController (
PciIo,
VGA_GRAPHICS_CONTROLLER_MODE_REGISTER,
VGA_GRAPHICS_CONTROLLER_READ_MODE_0 | VGA_GRAPHICS_CONTROLLER_WRITE_MODE_2
);
//
// Program the Data Rotate/Function Select Register to replace
//
WriteGraphicsController (
PciIo,
VGA_GRAPHICS_CONTROLLER_DATA_ROTATE_REGISTER,
VGA_GRAPHICS_CONTROLLER_FUNCTION_REPLACE
);
if (LeftMask != 0) {
//
// Program the BitMask register with the Left column mask
//
WriteGraphicsController (
PciIo,
VGA_GRAPHICS_CONTROLLER_BIT_MASK_REGISTER,
LeftMask
);
for (Index = 0, Address = StartAddress; Index < Height; Index++, Address += BytesPerScanLine) {
//
// Read data from the bit planes into the latches
//
PciIo->Mem.Read (
PciIo,
EfiPciIoWidthUint8,
EFI_PCI_IO_PASS_THROUGH_BAR,
(UINT64) (UINTN) Address,
1,
&Data
);
//
// Write the lower 4 bits of PixelColor to the bit planes in the pixels enabled by BitMask
//
PciIo->Mem.Write (
PciIo,
EfiPciIoWidthUint8,
EFI_PCI_IO_PASS_THROUGH_BAR,
(UINT64) (UINTN) Address,
1,
&PixelColor
);
}
}
if (Bytes > 1) {
//
// Program the BitMask register with the middle column mask of 0xff
//
WriteGraphicsController (
PciIo,
VGA_GRAPHICS_CONTROLLER_BIT_MASK_REGISTER,
0xff
);
for (Index = 0, Address = StartAddress + 1; Index < Height; Index++, Address += BytesPerScanLine) {
PciIo->Mem.Write (
PciIo,
EfiPciIoWidthFillUint8,
EFI_PCI_IO_PASS_THROUGH_BAR,
(UINT64) (UINTN) Address,
Bytes - 1,
&PixelColor
);
}
}
if (RightMask != 0) {
//
// Program the BitMask register with the Right column mask
//
WriteGraphicsController (
PciIo,
VGA_GRAPHICS_CONTROLLER_BIT_MASK_REGISTER,
RightMask
);
for (Index = 0, Address = StartAddress + Bytes; Index < Height; Index++, Address += BytesPerScanLine) {
//
// Read data from the bit planes into the latches
//
PciIo->Mem.Read (
PciIo,
EfiPciIoWidthUint8,
EFI_PCI_IO_PASS_THROUGH_BAR,
(UINT64) (UINTN) Address,
1,
&Data
);
//
// Write the lower 4 bits of PixelColor to the bit planes in the pixels enabled by BitMask
//
PciIo->Mem.Write (
PciIo,
EfiPciIoWidthUint8,
EFI_PCI_IO_PASS_THROUGH_BAR,
(UINT64) (UINTN) Address,
1,
&PixelColor
);
}
}
break;
case EfiBltBufferToVideo:
StartAddress = (UINTN) (MemAddress + (DestinationY << 6) + (DestinationY << 4) + (DestinationX >> 3));
LeftMask = mVgaBitMaskTable[DestinationX & 0x07];
//
// Program the Mode Register Write mode 2, Read mode 0
//
WriteGraphicsController (
PciIo,
VGA_GRAPHICS_CONTROLLER_MODE_REGISTER,
VGA_GRAPHICS_CONTROLLER_READ_MODE_0 | VGA_GRAPHICS_CONTROLLER_WRITE_MODE_2
);
//
// Program the Data Rotate/Function Select Register to replace
//
WriteGraphicsController (
PciIo,
VGA_GRAPHICS_CONTROLLER_DATA_ROTATE_REGISTER,
VGA_GRAPHICS_CONTROLLER_FUNCTION_REPLACE
);
for (Index = 0, Address = StartAddress; Index < Height; Index++, Address += BytesPerScanLine) {
for (Index1 = 0; Index1 < Width; Index1++) {
BiosVideoPrivate->LineBuffer[Index1] = VgaConvertColor (&BltBuffer[(SourceY + Index) * (Delta >> 2) + SourceX + Index1]);
}
AddressFix = Address;
for (Bit = 0; Bit < 8; Bit++) {
//
// Program the BitMask register with the Left column mask
//
WriteGraphicsController (
PciIo,
VGA_GRAPHICS_CONTROLLER_BIT_MASK_REGISTER,
LeftMask
);
for (Index1 = Bit, Address1 = (UINT8 *) AddressFix; Index1 < Width; Index1 += 8, Address1++) {
//
// Read data from the bit planes into the latches
//
PciIo->Mem.Read (
PciIo,
EfiPciIoWidthUint8,
EFI_PCI_IO_PASS_THROUGH_BAR,
(UINT64) (UINTN) Address1,
1,
&Data
);
PciIo->Mem.Write (
PciIo,
EfiPciIoWidthUint8,
EFI_PCI_IO_PASS_THROUGH_BAR,
(UINT64) (UINTN) Address1,
1,
&BiosVideoPrivate->LineBuffer[Index1]
);
}
LeftMask = (UINT8) (LeftMask >> 1);
if (LeftMask == 0) {
LeftMask = 0x80;
AddressFix++;
}
}
}
break;
default: ;
}
gBS->RestoreTPL (OriginalTPL);
return EFI_SUCCESS;
}
//
// VGA Mini Port Protocol Functions
//
/**
VgaMiniPort protocol interface to set mode.
@param This Pointer to VgaMiniPort protocol instance
@param ModeNumber The index of the mode
@retval EFI_UNSUPPORTED The requested mode is not supported
@retval EFI_SUCCESS The requested mode is set successfully
**/
EFI_STATUS
EFIAPI
BiosVideoVgaMiniPortSetMode (
IN EFI_VGA_MINI_PORT_PROTOCOL *This,
IN UINTN ModeNumber
)
{
BIOS_VIDEO_DEV *BiosVideoPrivate;
EFI_IA32_REGISTER_SET Regs;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// Make sure the ModeNumber is a valid value
//
if (ModeNumber >= This->MaxMode) {
return EFI_UNSUPPORTED;
}
//
// Get the device structure for this device
//
BiosVideoPrivate = BIOS_VIDEO_DEV_FROM_VGA_MINI_PORT_THIS (This);
switch (ModeNumber) {
case 0:
//
// Set the 80x25 Text VGA Mode
//
Regs.H.AH = 0x00;
Regs.H.AL = 0x83;
BiosVideoPrivate->LegacyBios->Int86 (BiosVideoPrivate->LegacyBios, 0x10, &Regs);
Regs.H.AH = 0x11;
Regs.H.AL = 0x14;
Regs.H.BL = 0;
BiosVideoPrivate->LegacyBios->Int86 (BiosVideoPrivate->LegacyBios, 0x10, &Regs);
break;
case 1:
//
// Set the 80x50 Text VGA Mode
//
Regs.H.AH = 0x00;
Regs.H.AL = 0x83;
BiosVideoPrivate->LegacyBios->Int86 (BiosVideoPrivate->LegacyBios, 0x10, &Regs);
Regs.H.AH = 0x11;
Regs.H.AL = 0x12;
Regs.H.BL = 0;
BiosVideoPrivate->LegacyBios->Int86 (BiosVideoPrivate->LegacyBios, 0x10, &Regs);
break;
default:
return EFI_UNSUPPORTED;
}
return EFI_SUCCESS;
}
/**
Event handler for Exit Boot Service.
@param Event The event that be siganlled when exiting boot service.
@param Context Pointer to instance of BIOS_VIDEO_DEV.
**/
VOID
EFIAPI
BiosVideoNotifyExitBootServices (
IN EFI_EVENT Event,
IN VOID *Context
)
{
BIOS_VIDEO_DEV *BiosVideoPrivate;
EFI_IA32_REGISTER_SET Regs;
BiosVideoPrivate = (BIOS_VIDEO_DEV *)Context;
//
// Set the 80x25 Text VGA Mode
//
Regs.H.AH = 0x00;
Regs.H.AL = 0x03;
BiosVideoPrivate->LegacyBios->Int86 (BiosVideoPrivate->LegacyBios, 0x10, &Regs);
Regs.H.AH = 0x00;
Regs.H.AL = 0x83;
BiosVideoPrivate->LegacyBios->Int86 (BiosVideoPrivate->LegacyBios, 0x10, &Regs);
Regs.H.AH = 0x11;
Regs.H.AL = 0x04;
Regs.H.BL = 0;
BiosVideoPrivate->LegacyBios->Int86 (BiosVideoPrivate->LegacyBios, 0x10, &Regs);
}
/**
The user Entry Point for module UefiBiosVideo. The user code starts with this function.
@param[in] ImageHandle The firmware allocated handle for the EFI image.
@param[in] SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The entry point is executed successfully.
@retval other Some error occurs when executing this entry point.
**/
EFI_STATUS
EFIAPI
BiosVideoEntryPoint(
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
//
// Install driver model protocol(s).
//
Status = EfiLibInstallDriverBindingComponentName2 (
ImageHandle,
SystemTable,
&gBiosVideoDriverBinding,
ImageHandle,
&gBiosVideoComponentName,
&gBiosVideoComponentName2
);
ASSERT_EFI_ERROR (Status);
//
// Install Legacy BIOS GUID to mark this driver as a BIOS Thunk Driver
//
return gBS->InstallMultipleProtocolInterfaces (
&ImageHandle,
&gEfiLegacyBiosGuid,
NULL,
NULL
);
}
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