PciHostBridgeSupport.c File Reference

#include <PiDxe.h>
#include <IndustryStandard/Pci.h>
#include <Protocol/PciHostBridgeResourceAllocation.h>
#include <Protocol/PciRootBridgeIo.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/PciHostBridgeLib.h>
#include <Library/PciLib.h>
#include "PciHostBridge.h"

Go to the source code of this file.

Functions
STATIC VOID	PcatPciRootBridgeBarExisted (IN UINTN Address, OUT UINT32 *OriginalValue, OUT UINT32 *Value)
STATIC VOID	PcatPciRootBridgeParseBars (IN UINT16 Command, IN UINTN Bus, IN UINTN Device, IN UINTN Function, IN UINTN BarOffsetBase, IN UINTN BarOffsetEnd, IN PCI_ROOT_BRIDGE_APERTURE *Io, IN PCI_ROOT_BRIDGE_APERTURE *Mem, IN PCI_ROOT_BRIDGE_APERTURE *MemAbove4G)
PCI_ROOT_BRIDGE *	ScanForRootBridges (OUT UINTN *NumberOfRootBridges)
PCI_ROOT_BRIDGE *	RetrieveRootBridgeInfoFromHob (IN UNIVERSAL_PAYLOAD_PCI_ROOT_BRIDGES *PciRootBridgeInfo, OUT UINTN *NumberOfRootBridges)

Variables
STATIC PCI_ROOT_BRIDGE_APERTURE	mNonExistAperture = { MAX_UINT64, 0 }

Detailed Description

Scan the entire PCI bus for root bridges to support coreboot UEFI payload.

Copyright (c) 2016 - 2021, Intel Corporation. All rights reserved.

SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file PciHostBridgeSupport.c.

Function Documentation

PcatPciRootBridgeBarExisted()

STATIC VOID PcatPciRootBridgeBarExisted	(	IN UINTN	Address,
		OUT UINT32 *	OriginalValue,
		OUT UINT32 *	Value
	)

Probe a bar is existed or not.

Parameters

[in]	Address	PCI address for the BAR.
[out]	OriginalValue	The original bar value returned.
[out]	Value	The probed bar value returned.

Definition at line 30 of file PciHostBridgeSupport.c.

PcatPciRootBridgeParseBars()

STATIC VOID PcatPciRootBridgeParseBars	(	IN UINT16	Command,
		IN UINTN	Bus,
		IN UINTN	Device,
		IN UINTN	Function,
		IN UINTN	BarOffsetBase,
		IN UINTN	BarOffsetEnd,
		IN PCI_ROOT_BRIDGE_APERTURE *	Io,
		IN PCI_ROOT_BRIDGE_APERTURE *	Mem,
		IN PCI_ROOT_BRIDGE_APERTURE *	MemAbove4G
	)

Parse PCI bar and collect the assigned PCI resource information.

Parameters

[in]	Command	Supported attributes.
[in]	Bus	PCI bus number.
[in]	Device	PCI device number.
[in]	Function	PCI function number.
[in]	BarOffsetBase	PCI bar start offset.
[in]	BarOffsetEnd	PCI bar end offset.
[in]	Io	IO aperture.
[in]	Mem	MMIO aperture.
[in]	MemAbove4G	MMIO aperture above 4G.
[in]	PMem	Prefetchable MMIO aperture.
[in]	PMemAbove4G	Prefetchable MMIO aperture above 4G.

Definition at line 83 of file PciHostBridgeSupport.c.

RetrieveRootBridgeInfoFromHob()

PCI_ROOT_BRIDGE * RetrieveRootBridgeInfoFromHob	(	IN UNIVERSAL_PAYLOAD_PCI_ROOT_BRIDGES *	PciRootBridgeInfo,
		OUT UINTN *	NumberOfRootBridges
	)

Scan for all root bridges from Universal Payload PciRootBridgeInfoHob

Parameters

[in]	PciRootBridgeInfo	Pointer of Universal Payload PCI Root Bridge Info Hob
[out]	NumberOfRootBridges	Number of root bridges detected

Return values

Pointer

to the allocated PCI_ROOT_BRIDGE structure array.

Definition at line 536 of file PciHostBridgeSupport.c.

ScanForRootBridges()

PCI_ROOT_BRIDGE * ScanForRootBridges

(

OUT UINTN *

NumberOfRootBridges

)

Scan for all root bridges in platform.

Parameters

[out]

NumberOfRootBridges

Number of root bridges detected

Return values

Pointer

to the allocated PCI_ROOT_BRIDGE structure array.

Definition at line 208 of file PciHostBridgeSupport.c.

Variable Documentation

mNonExistAperture

STATIC PCI_ROOT_BRIDGE_APERTURE mNonExistAperture = { MAX_UINT64, 0 }

Definition at line 198 of file PciHostBridgeSupport.c.