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The AtaAtapiPassThru driver maps three system memory regions for Bus
Master Common Buffer operation on the following call path, if the
controller has PCI_CLASS_MASS_STORAGE_SATADPA class code:
AtaAtapiPassThruStart()
EnumerateAttachedDevice()
AhciModeInitialization()
AhciCreateTransferDescriptor()
The device is disabled (including Bus Master DMA) when the controller is
unbound, in AtaAtapiPassThruStop(). Then the regions are unmapped.
The former step should also be done when we exit the boot services, and
the OS gains ownership of system memory.
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
EDK II Project
A modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications from www.uefi.org.
Contributions to the EDK II open source project are covered by the TianoCore Contribution Agreement 1.1
The majority of the content in the EDK II open source project uses a BSD 2-Clause License. The EDK II open source project contains the following components that are covered by additional licenses:
- AppPkg/Applications/Python/Python-2.7.2/Tools/pybench
- AppPkg/Applications/Python/Python-2.7.2
- AppPkg/Applications/Python/Python-2.7.10
- BaseTools/Source/C/BrotliCompress
- MdeModulePkg/Library/BrotliCustomDecompressLib
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The EDK II Project is composed of packages. The maintainers for each package are listed in Maintainers.txt.