mirror of https://github.com/acidanthera/audk.git
114 lines
3.1 KiB
C
114 lines
3.1 KiB
C
/** @file
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Functions declarations to make Xen hypercalls.
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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 __XENBUS_DXE_HYPERCALL_H__
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#define __XENBUS_DXE_HYPERCALL_H__
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/**
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This function will put the two arguments in the right place (registers) and
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call HypercallAddr, which correspond to an entry in the hypercall pages.
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@param HypercallAddr A memory address where the hypercall to call is.
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@param Arg1 First argument.
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@param Arg2 Second argument.
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@return Return 0 if success otherwise it return an errno.
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**/
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INTN
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EFIAPI
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XenHypercall2 (
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IN VOID *HypercallAddr,
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IN OUT INTN Arg1,
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IN OUT INTN Arg2
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);
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/**
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Get the page where all hypercall are from the XenInfo hob.
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@param Dev A XENBUS_DEVICE instance.
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@retval EFI_NOT_FOUND hyperpage could not be found.
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@retval EFI_SUCCESS Successfully retrieve the hyperpage pointer.
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**/
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EFI_STATUS
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XenHyperpageInit (
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XENBUS_DEVICE *Dev
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);
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/**
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Return the value of the HVM parameter Index.
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@param Dev A XENBUS_DEVICE instance.
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@param Index The parameter to get, e.g. HVM_PARAM_STORE_EVTCHN.
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@return The value of the asked parameter or 0 in case of error.
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**/
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UINT64
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XenHypercallHvmGetParam (
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XENBUS_DEVICE *Dev,
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UINT32 Index
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);
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/**
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Hypercall to do different operation on the memory.
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@param Dev A XENBUS_DEVICE instance.
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@param Operation The operation number, e.g. XENMEM_add_to_physmap.
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@param Arguments The arguments associated to the operation.
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@return Return the return value from the hypercall, 0 in case of success
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otherwise, an error code.
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**/
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INTN
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XenHypercallMemoryOp (
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IN XENBUS_DEVICE *Dev,
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IN UINTN Operation,
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IN OUT VOID *Arguments
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);
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/**
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Do an operation on the event channels.
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@param Dev A XENBUS_DEVICE instance.
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@param Operation The operation number, e.g. EVTCHNOP_send.
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@param Arguments The argument associated to the operation.
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@return Return the return value from the hypercall, 0 in case of success
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otherwise, an error code.
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**/
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INTN
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XenHypercallEventChannelOp (
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IN XENBUS_DEVICE *Dev,
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IN INTN Operation,
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IN OUT VOID *Arguments
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);
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/**
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Map the shared_info_t page into memory.
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@param Dev A XENBUS_DEVICE instance.
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@retval EFI_SUCCESS Dev->SharedInfo whill contain a pointer to
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the shared info page
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@retval EFI_LOAD_ERROR The shared info page could not be mapped. The
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hypercall returned an error.
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**/
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EFI_STATUS
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XenGetSharedInfoPage (
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IN OUT XENBUS_DEVICE *Dev
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);
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#endif
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