05a5379458
The VMWare SVGA display device implemented by Qemu (-vga vmware) uses an I/O-type BAR which is laid out such that some register offsets are not aligned to the read/write width with which they are expected to be accessed. (The register value port has an offset of 1 and requires 32 bit wide read/write access.) The EFI_PCI_IO_PROTOCOL's Io.Read/Io.Write functions do not support such unaligned I/O. Before a driver for this device can be added to QemuVideoDxe, helper functions for unaligned I/O are therefore required. This adds the functions UnalignedIoWrite32 and UnalignedIoRead32, based on IoLib's IoWrite32 and IoRead32, for the Ia32 and X64 architectures. Port I/O requires inline assembly, so implementations are provided for the GCC, ICC, and Microsoft compiler families. Such I/O is not possible on other architectures, a dummy (ASSERT()ing) implementation is therefore provided to satisfy the linker. Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Laszlo Ersek <lersek@redhat.com> Suggested-by: Jordan Justen <jordan.l.justen@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Phil Dennis-Jordan <phil@philjordan.eu> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
79 lines
2.3 KiB
INI
79 lines
2.3 KiB
INI
## @file
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# This driver is a sample implementation of the Graphics Output Protocol for
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# the QEMU (Cirrus Logic 5446) video controller.
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#
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# Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
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#
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# This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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##
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[Defines]
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INF_VERSION = 0x00010005
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BASE_NAME = QemuVideoDxe
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FILE_GUID = e3752948-b9a1-4770-90c4-df41c38986be
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MODULE_TYPE = UEFI_DRIVER
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VERSION_STRING = 1.0
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ENTRY_POINT = InitializeQemuVideo
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#
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# The following information is for reference only and not required by the build tools.
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#
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# VALID_ARCHITECTURES = IA32 X64 IPF EBC ARM AARCH64
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#
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# DRIVER_BINDING = gQemuVideoDriverBinding
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# COMPONENT_NAME = gQemuVideoComponentName
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#
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[Sources.common]
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ComponentName.c
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Driver.c
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DriverSupportedEfiVersion.c
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Gop.c
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Initialize.c
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[Sources.Ia32, Sources.X64]
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VbeShim.c
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UnalignedIoGcc.c | GCC
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UnalignedIoMsc.c | MSFT
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UnalignedIoIcc.c | INTEL
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[Sources.IPF, Sources.EBC, Sources.ARM, Sources.AARCH64]
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UnalignedIoUnsupported.c
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[Packages]
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MdePkg/MdePkg.dec
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MdeModulePkg/MdeModulePkg.dec
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OptionRomPkg/OptionRomPkg.dec
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OvmfPkg/OvmfPkg.dec
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[LibraryClasses]
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BaseMemoryLib
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FrameBufferBltLib
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DebugLib
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DevicePathLib
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MemoryAllocationLib
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PciLib
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PrintLib
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TimerLib
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UefiBootServicesTableLib
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UefiDriverEntryPoint
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UefiLib
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[Protocols]
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gEfiDriverSupportedEfiVersionProtocolGuid # PROTOCOL ALWAYS_PRODUCED
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gEfiGraphicsOutputProtocolGuid # PROTOCOL BY_START
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gEfiDevicePathProtocolGuid # PROTOCOL BY_START
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gEfiPciIoProtocolGuid # PROTOCOL TO_START
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[Pcd]
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gOptionRomPkgTokenSpaceGuid.PcdDriverSupportedEfiVersion
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