bbc3758ab5
This refactors the Xen hypercall implementation that is part of the XenBusDxe driver, in preparation of splitting it off entirely into a XenHypercallLib library. This involves: - removing the dependency on XENBUS_DEVICE* pointers in the XenHypercall() prototypes - moving the discovered hyperpage address to a global variable - moving XenGetSharedInfoPage() to its only user XenBusDxe.c (the shared info page is not strictly part of the Xen hypercall interface, and is not used by other expected users of XenHypercallLib such as the Xen console version of SerialPortLib - reimplement XenHypercall2() in C and move the indexing of the hyperpage there; the existing asm implementations are renamed to __XenHypercall2() and invoked from the new C implementation. Contributed-under: TianoCore Contribution Agreement 1.0 Acked-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Anthony PERARD <anthony.perard@citrix.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Laszlo Ersek <lersek@redhat.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16969 6f19259b-4bc3-4df7-8a09-765794883524
138 lines
3.2 KiB
C
138 lines
3.2 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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// 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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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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