mirror of https://github.com/acidanthera/audk.git
81 lines
2.6 KiB
C
81 lines
2.6 KiB
C
|
/** @file
|
||
|
|
Header file of PciHostBridgeLib.
|
||
|
|
|
||
|
|
Copyright (C) 2016, Red Hat, Inc.
|
||
|
|
Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
|
||
|
|
|
||
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
||
|
|
|
||
|
|
**/
|
||
|
|
|
||
|
|
#ifndef _PCI_HOST_BRIDGE_H
|
||
|
|
#define _PCI_HOST_BRIDGE_H
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
ACPI_HID_DEVICE_PATH AcpiDevicePath;
|
||
|
|
EFI_DEVICE_PATH_PROTOCOL EndDevicePath;
|
||
|
|
} CB_PCI_ROOT_BRIDGE_DEVICE_PATH;
|
||
|
|
|
||
|
|
PCI_ROOT_BRIDGE *
|
||
|
|
ScanForRootBridges (
|
||
|
|
UINTN *NumberOfRootBridges
|
||
|
|
);
|
||
|
|
|
||
|
|
/**
|
||
|
|
Initialize a PCI_ROOT_BRIDGE structure.
|
||
|
|
|
||
|
|
@param[in] Supports Supported attributes.
|
||
|
|
|
||
|
|
@param[in] Attributes Initial attributes.
|
||
|
|
|
||
|
|
@param[in] AllocAttributes Allocation attributes.
|
||
|
|
|
||
|
|
@param[in] RootBusNumber The bus number to store in RootBus.
|
||
|
|
|
||
|
|
@param[in] MaxSubBusNumber The inclusive maximum bus number that can be
|
||
|
|
assigned to any subordinate bus found behind any
|
||
|
|
PCI bridge hanging off this root bus.
|
||
|
|
|
||
|
|
The caller is responsible for ensuring that
|
||
|
|
RootBusNumber <= MaxSubBusNumber. If
|
||
|
|
RootBusNumber equals MaxSubBusNumber, then the
|
||
|
|
root bus has no room for subordinate buses.
|
||
|
|
|
||
|
|
@param[in] Io IO aperture.
|
||
|
|
|
||
|
|
@param[in] Mem MMIO aperture.
|
||
|
|
|
||
|
|
@param[in] MemAbove4G MMIO aperture above 4G.
|
||
|
|
|
||
|
|
@param[in] PMem Prefetchable MMIO aperture.
|
||
|
|
|
||
|
|
@param[in] PMemAbove4G Prefetchable MMIO aperture above 4G.
|
||
|
|
|
||
|
|
@param[out] RootBus The PCI_ROOT_BRIDGE structure (allocated by the
|
||
|
|
caller) that should be filled in by this
|
||
|
|
function.
|
||
|
|
|
||
|
|
@retval EFI_SUCCESS Initialization successful. A device path
|
||
|
|
consisting of an ACPI device path node, with
|
||
|
|
UID = RootBusNumber, has been allocated and
|
||
|
|
linked into RootBus.
|
||
|
|
|
||
|
|
@retval EFI_OUT_OF_RESOURCES Memory allocation failed.
|
||
|
|
**/
|
||
|
|
EFI_STATUS
|
||
|
|
InitRootBridge (
|
||
|
|
IN UINT64 Supports,
|
||
|
|
IN UINT64 Attributes,
|
||
|
|
IN UINT64 AllocAttributes,
|
||
|
|
IN UINT8 RootBusNumber,
|
||
|
|
IN UINT8 MaxSubBusNumber,
|
||
|
|
IN PCI_ROOT_BRIDGE_APERTURE *Io,
|
||
|
|
IN PCI_ROOT_BRIDGE_APERTURE *Mem,
|
||
|
|
IN PCI_ROOT_BRIDGE_APERTURE *MemAbove4G,
|
||
|
|
IN PCI_ROOT_BRIDGE_APERTURE *PMem,
|
||
|
|
IN PCI_ROOT_BRIDGE_APERTURE *PMemAbove4G,
|
||
|
|
OUT PCI_ROOT_BRIDGE *RootBus
|
||
|
|
);
|
||
|
|
|
||
|
|
#endif
|