cd8ff8fdda
This moves all of the Xen hypercall code that was private to XenBusDxe to a new library class XenHypercallLib. This will allow us to reimplement it for ARM, and to export the Xen hypercall functionality to other parts of the code, such as a Xen console SerialPortLib driver. Contributed-under: TianoCore Contribution Agreement 1.0 Reviewed-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@16970 6f19259b-4bc3-4df7-8a09-765794883524
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
/** @file
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Functions 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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#include <PiDxe.h>
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#include <IndustryStandard/Xen/hvm/params.h>
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#include <IndustryStandard/Xen/memory.h>
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#include <Library/DebugLib.h>
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#include <Library/XenHypercallLib.h>
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UINT64
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XenHypercallHvmGetParam (
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IN UINT32 Index
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)
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{
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xen_hvm_param_t Parameter;
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INTN Error;
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Parameter.domid = DOMID_SELF;
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Parameter.index = Index;
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Error = XenHypercall2 (__HYPERVISOR_hvm_op,
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HVMOP_get_param, (INTN) &Parameter);
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if (Error != 0) {
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DEBUG ((EFI_D_ERROR,
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"XenHypercall: Error %d trying to get HVM parameter %d\n",
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Error, Index));
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return 0;
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}
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return Parameter.value;
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}
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INTN
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XenHypercallMemoryOp (
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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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return XenHypercall2 (__HYPERVISOR_memory_op,
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Operation, (INTN) Arguments);
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}
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INTN
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XenHypercallEventChannelOp (
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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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return XenHypercall2 (__HYPERVISOR_event_channel_op,
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Operation, (INTN) Arguments);
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}
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