Beyond BIOS: Developing with the Unified Extensible Firmware Interface, Third Edition by Vincent Zimmer & Michael Rothman & Suresh Marisetty

Author:Vincent Zimmer & Michael Rothman & Suresh Marisetty [Zimmer, Vincent]
Language: eng
Format: azw3, mobi
Publisher: De|G Press
Published: 2017-01-22T16:00:00+00:00

PollMem - Polls an address in PCI memory space until an exit condition is met, or a timeout occurs.

PollIo - Polls an address in PCI I/O space until an exit condition is met, or a timeout occurs.

Mem - Allows BAR relative reads and writes for PCI memory space.

Io - Allows BAR relative reads and writes for PCI I/O space.

Pci - Allows PCI controller relative reads and writes for PCI configuration space.

CopyMem - Allows one region of PCI memory space to be copied to another region of PCI memory space.

Map - Provides the PCI controller–specific address needed to access system memory for DMA.

Unmap - Releases any resources allocated by Map().

AllocateBuffer - Allocates pages that are suitable for a common buffer mapping.

FreeBuffer - Frees pages that were allocated with AllocateBuffer().

Flush - Flushes all PCI posted write transactions to system memory.

GetLocation - Retrieves this PCI controller’s current PCI bus number, device number, and function number.

Attributes - Performs an operation on the attributes that this PCI controller supports. The operations include getting the set of supported attributes, retrieving the current attributes, setting the current attributes, enabling attributes, and disabling attributes.

GetBarAttributes - Gets the attributes that this PCI controller supports setting on a BAR using SetBarAttributes(), and retrieves the list of resource descriptors for a BAR.

SetBarAttributes - Sets the attributes for a range of a BAR on a PCI controller.

RomSize – Gives the size, in bytes, of the ROM image.

RomImage – Returns a pointer to the in memory copy of the ROM image. The PCI Bus Driver is responsible for allocating memory for the ROM image, and copying the contents of the ROM to memory. The contents of this buffer are either from the PCI option ROM that can be accessed through the ROM BAR of the PCI controller, or from a platform-specific location. The Attributes() function can be used to determine from which of these two sources the RomImage buffer was initialized.

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