diff options
Diffstat (limited to 'OvmfPkg/XenBusDxe/XenHypercall.h')
-rw-r--r-- | OvmfPkg/XenBusDxe/XenHypercall.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/OvmfPkg/XenBusDxe/XenHypercall.h b/OvmfPkg/XenBusDxe/XenHypercall.h new file mode 100644 index 0000000000..3627b1886c --- /dev/null +++ b/OvmfPkg/XenBusDxe/XenHypercall.h @@ -0,0 +1,115 @@ +/** @file
+ Functions declarations to make Xen hypercalls.
+
+ Copyright (C) 2014, Citrix Ltd.
+
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef __XENBUS_DXE_HYPERCALL_H__
+#define __XENBUS_DXE_HYPERCALL_H__
+
+typedef struct _XENBUS_DEVICE XENBUS_DEVICE;
+
+/**
+ This function will put the two arguments in the right place (registers) and
+ call HypercallAddr, which correspond to an entry in the hypercall pages.
+
+ @param HypercallAddr A memory address where the hypercall to call is.
+ @param Arg1 First argument.
+ @param Arg2 Second argument.
+
+ @return Return 0 if success otherwise it return an errno.
+**/
+INTN
+EFIAPI
+XenHypercall2 (
+ IN VOID *HypercallAddr,
+ IN OUT INTN Arg1,
+ IN OUT INTN Arg2
+ );
+
+/**
+ Get the page where all hypercall are from the XenInfo hob.
+
+ @param Dev A XENBUS_DEVICE instance.
+
+ @retval EFI_NOT_FOUND hyperpage could not be found.
+ @retval EFI_SUCCESS Successfully retrieve the hyperpage pointer.
+**/
+EFI_STATUS
+XenHyperpageInit (
+ XENBUS_DEVICE *Dev
+ );
+
+/**
+ Return the value of the HVM parameter Index.
+
+ @param Dev A XENBUS_DEVICE instance.
+ @param Index The parameter to get, e.g. HVM_PARAM_STORE_EVTCHN.
+
+ @return The value of the asked parameter or 0 in case of error.
+**/
+UINT64
+XenHypercallHvmGetParam (
+ XENBUS_DEVICE *Dev,
+ INTN Index
+ );
+
+/**
+ Hypercall to do different operation on the memory.
+
+ @param Dev A XENBUS_DEVICE instance.
+ @param Operation The operation number, e.g. XENMEM_add_to_physmap.
+ @param Arguments The arguments associated to the operation.
+
+ @return Return the return value from the hypercall, 0 in case of success
+ otherwise, an error code.
+**/
+INTN
+XenHypercallMemoryOp (
+ IN XENBUS_DEVICE *Dev,
+ IN UINTN Operation,
+ IN OUT VOID *Arguments
+ );
+
+/**
+ Do an operation on the event channels.
+
+ @param Dev A XENBUS_DEVICE instance.
+ @param Operation The operation number, e.g. EVTCHNOP_send.
+ @param Arguments The argument associated to the operation.
+
+ @return Return the return value from the hypercall, 0 in case of success
+ otherwise, an error code.
+**/
+INTN
+XenHypercallEventChannelOp (
+ IN XENBUS_DEVICE *Dev,
+ IN INTN Operation,
+ IN OUT VOID *Arguments
+ );
+
+/**
+ Map the shared_info_t page into memory.
+
+ @param Dev A XENBUS_DEVICE instance.
+
+ @retval EFI_SUCCESS Dev->SharedInfo whill contain a pointer to
+ the shared info page
+ @retval EFI_LOAD_ERROR The shared info page could not be mapped. The
+ hypercall returned an error.
+**/
+EFI_STATUS
+XenGetSharedInfoPage (
+ IN OUT XENBUS_DEVICE *Dev
+ );
+
+#endif
|