86d968e05e
This is a bus-like on top of XenStore. It will look for advertised ParaVirtualized devices and initialize them by producing XenBus protocol. Change in V4: - Replace the license by the commonly used file header text. - Clean XenBus.h header (remove copyright that does not belong to the file anymore; and rewrite the brief description of the file) - Fix description on the function Change in V3: - Insert to ChildList later, once populated. - Remove XENBUS_XENSTORE_NODE macro. - add comment to XenBusAddDevice and XenBusEnumerateBus about concurrency calls. - Add a description to the introduced member to the protocol. Change in V2: - comment, file header - Fix comment style - Error handling in the main init function - coding style - Fix error path in add device. Origin: FreeBSD 10.0 License: This patch adds XenBus.c which is under the MIT licence. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Acked-by: Jordan Justen <jordan.l.justen@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16270 6f19259b-4bc3-4df7-8a09-765794883524
144 lines
3.3 KiB
C
144 lines
3.3 KiB
C
/** @file
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Function declaration and internal data for XenBusDxe.
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Copyright (C) 2014, Citrix Ltd.
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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_XENBUS_DXE_H__
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#define __EFI_XENBUS_DXE_H__
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#include <Uefi.h>
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//
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// Xen interface version used
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//
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#define __XEN_INTERFACE_VERSION__ 0x00040400
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//
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// Libraries
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//
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/BaseLib.h>
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#include <Library/UefiLib.h>
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#include <Library/DevicePathLib.h>
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#include <Library/DebugLib.h>
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//
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// UEFI Driver Model Protocols
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//
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#include <Protocol/DriverBinding.h>
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//
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// Consumed Protocols
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//
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#include <Protocol/PciIo.h>
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//
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// Produced Protocols
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//
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#include <Protocol/XenBus.h>
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//
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// Driver Version
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//
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#define XENBUS_DXE_VERSION 0x00000010
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//
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// Protocol instances
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//
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extern EFI_DRIVER_BINDING_PROTOCOL gXenBusDxeDriverBinding;
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extern EFI_COMPONENT_NAME2_PROTOCOL gXenBusDxeComponentName2;
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extern EFI_COMPONENT_NAME_PROTOCOL gXenBusDxeComponentName;
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//
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// Include files with function prototypes
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//
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#include "DriverBinding.h"
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#include "ComponentName.h"
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//
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// Other stuff
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//
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#include <IndustryStandard/Xen/xen.h>
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#define PCI_VENDOR_ID_XEN 0x5853
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#define PCI_DEVICE_ID_XEN_PLATFORM 0x0001
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typedef struct _XENBUS_DEVICE_PATH XENBUS_DEVICE_PATH;
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typedef struct _XENBUS_DEVICE XENBUS_DEVICE;
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// Have the state of the driver.
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#define XENBUS_DEVICE_SIGNATURE SIGNATURE_32 ('X','B','s','t')
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struct _XENBUS_DEVICE {
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UINT32 Signature;
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EFI_DRIVER_BINDING_PROTOCOL *This;
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EFI_HANDLE ControllerHandle;
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EFI_PCI_IO_PROTOCOL *PciIo;
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EFI_EVENT ExitBootEvent;
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EFI_DEVICE_PATH_PROTOCOL *DevicePath;
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LIST_ENTRY ChildList;
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VOID *Hyperpage;
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shared_info_t *SharedInfo;
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};
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// There is one of this struct allocated for every child.
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#define XENBUS_PRIVATE_DATA_SIGNATURE SIGNATURE_32 ('X', 'B', 'p', 'd')
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typedef struct {
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UINTN Signature;
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LIST_ENTRY Link;
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EFI_HANDLE Handle;
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XENBUS_PROTOCOL XenBusIo;
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XENBUS_DEVICE *Dev;
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XENBUS_DEVICE_PATH *DevicePath;
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} XENBUS_PRIVATE_DATA;
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#define XENBUS_PRIVATE_DATA_FROM_THIS(a) \
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CR (a, XENBUS_PRIVATE_DATA, XenBusIo, XENBUS_PRIVATE_DATA_SIGNATURE)
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#define XENBUS_PRIVATE_DATA_FROM_LINK(a) \
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CR (a, XENBUS_PRIVATE_DATA, Link, XENBUS_PRIVATE_DATA_SIGNATURE)
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/*
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* Helpers
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*/
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/**
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Atomically test and clear a bit.
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@param Bit Bit index to test in *Address
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@param Address The Address to the buffer that contain the bit to test.
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@return Value of the Bit before it was cleared.
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**/
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INT32
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EFIAPI
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TestAndClearBit (
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IN INT32 Bit,
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IN volatile VOID *Address
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);
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CHAR8*
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AsciiStrDup (
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IN CONST CHAR8* Str
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);
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#endif
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