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https://github.com/CloverHackyColor/CloverBootloader.git
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191 lines
5.1 KiB
C
191 lines
5.1 KiB
C
/** @file
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PCI Hot Plug support functions declaration for PCI Bus module.
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Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
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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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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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#ifndef _EFI_PCI_HOT_PLUG_SUPPORT_H_
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#define _EFI_PCI_HOT_PLUG_SUPPORT_H_
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//
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// stall 1 second, its unit is 100ns
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//
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#define STALL_1_SECOND 1000000
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//
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// PCI Hot Plug controller private data
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//
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typedef struct {
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EFI_EVENT Event;
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BOOLEAN Found;
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BOOLEAN Initialized;
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VOID *Padding;
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} ROOT_HPC_DATA;
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//
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// Reference of some global variabes
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//
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extern EFI_PCI_HOT_PLUG_INIT_PROTOCOL *gPciHotPlugInit;
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extern EFI_HPC_LOCATION *gPciRootHpcPool;
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extern ROOT_HPC_DATA *gPciRootHpcData;
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/**
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Event notification function to set Hot Plug controller status.
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@param Event The event that invoke this function.
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@param Context The calling context, pointer to ROOT_HPC_DATA.
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**/
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VOID
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EFIAPI
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PciHPCInitialized (
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IN EFI_EVENT Event,
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IN VOID *Context
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);
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/**
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Compare two device pathes to check if they are exactly same.
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@param DevicePath1 A pointer to the first device path data structure.
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@param DevicePath2 A pointer to the second device path data structure.
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@retval TRUE They are same.
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@retval FALSE They are not same.
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**/
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BOOLEAN
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EfiCompareDevicePath (
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IN EFI_DEVICE_PATH_PROTOCOL *DevicePath1,
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IN EFI_DEVICE_PATH_PROTOCOL *DevicePath2
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);
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/**
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Check hot plug support and initialize root hot plug private data.
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If Hot Plug is supported by the platform, call PCI Hot Plug Init protocol
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to get PCI Hot Plug controller's information and constructor the root hot plug
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private data structure.
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@retval EFI_SUCCESS They are same.
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@retval EFI_UNSUPPORTED No PCI Hot Plug controler on the platform.
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@retval EFI_OUT_OF_RESOURCES No memory to constructor root hot plug private
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data structure.
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**/
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EFI_STATUS
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InitializeHotPlugSupport (
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VOID
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);
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/**
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Test whether PCI device is hot plug bus.
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@param PciIoDevice PCI device instance.
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@retval TRUE PCI device is a hot plug bus.
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@retval FALSE PCI device is not a hot plug bus.
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**/
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BOOLEAN
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IsPciHotPlugBus (
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PCI_IO_DEVICE *PciIoDevice
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);
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/**
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Test whether device path is for root pci hot plug bus.
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@param HpbDevicePath A pointer to device path data structure to be tested.
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@param HpIndex If HpIndex is not NULL, return the index of root hot
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plug in global array when TRUE is retuned.
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@retval TRUE The device path is for root pci hot plug bus.
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@retval FALSE The device path is not for root pci hot plug bus.
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**/
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BOOLEAN
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IsRootPciHotPlugBus (
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IN EFI_DEVICE_PATH_PROTOCOL *HpbDevicePath,
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OUT UINTN *HpIndex OPTIONAL
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);
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/**
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Test whether device path is for root pci hot plug controller.
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@param HpcDevicePath A pointer to device path data structure to be tested.
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@param HpIndex If HpIndex is not NULL, return the index of root hot
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plug in global array when TRUE is retuned.
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@retval TRUE The device path is for root pci hot plug controller.
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@retval FALSE The device path is not for root pci hot plug controller.
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**/
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BOOLEAN
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IsRootPciHotPlugController (
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IN EFI_DEVICE_PATH_PROTOCOL *HpcDevicePath,
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OUT UINTN *HpIndex
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);
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/**
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Creating event object for PCI Hot Plug controller.
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@param HpIndex Index of hot plug device in global array.
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@param Event The retuned event that invoke this function.
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@return Status of create event invoken.
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**/
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EFI_STATUS
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CreateEventForHpc (
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IN UINTN HpIndex,
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OUT EFI_EVENT *Event
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);
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/**
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Wait for all root PCI Hot Plug controller finished initializing.
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@param TimeoutInMicroSeconds Microseconds to wait for all root HPCs' initialization.
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@retval EFI_SUCCESS All HPCs initialization finished.
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@retval EFI_TIMEOUT Not ALL HPCs initialization finished in Microseconds.
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**/
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EFI_STATUS
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AllRootHPCInitialized (
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IN UINTN TimeoutInMicroSeconds
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);
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/**
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Check whether PCI-PCI bridge has PCI Hot Plug capability register block.
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@param PciIoDevice A Pointer to the PCI-PCI bridge.
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@retval TRUE PCI device is HPC.
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@retval FALSE PCI device is not HPC.
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**/
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BOOLEAN
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IsSHPC (
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IN PCI_IO_DEVICE *PciIoDevice
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);
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/**
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Get resource padding if the specified PCI bridge is a hot plug bus.
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@param PciIoDevice PCI bridge instance.
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**/
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VOID
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GetResourcePaddingForHpb (
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IN PCI_IO_DEVICE *PciIoDevice
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);
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#endif
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