2 Functions declarations to make Xen hypercalls.
4 Copyright (C) 2014, Citrix Ltd.
6 This program and the accompanying materials
7 are licensed and made available under the terms and conditions of the BSD License
8 which accompanies this distribution. The full text of the license may be found at
9 http://opensource.org/licenses/bsd-license.php
11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
16 #ifndef __XENBUS_DXE_HYPERCALL_H__
17 #define __XENBUS_DXE_HYPERCALL_H__
19 typedef struct _XENBUS_DEVICE XENBUS_DEVICE
;
22 This function will put the two arguments in the right place (registers) and
23 call HypercallAddr, which correspond to an entry in the hypercall pages.
25 @param HypercallAddr A memory address where the hypercall to call is.
26 @param Arg1 First argument.
27 @param Arg2 Second argument.
29 @return Return 0 if success otherwise it return an errno.
34 IN VOID
*HypercallAddr
,
40 Get the page where all hypercall are from the XenInfo hob.
42 @param Dev A XENBUS_DEVICE instance.
44 @retval EFI_NOT_FOUND hyperpage could not be found.
45 @retval EFI_SUCCESS Successfully retrieve the hyperpage pointer.
53 Return the value of the HVM parameter Index.
55 @param Dev A XENBUS_DEVICE instance.
56 @param Index The parameter to get, e.g. HVM_PARAM_STORE_EVTCHN.
58 @return The value of the asked parameter or 0 in case of error.
61 XenHypercallHvmGetParam (
67 Hypercall to do different operation on the memory.
69 @param Dev A XENBUS_DEVICE instance.
70 @param Operation The operation number, e.g. XENMEM_add_to_physmap.
71 @param Arguments The arguments associated to the operation.
73 @return Return the return value from the hypercall, 0 in case of success
74 otherwise, an error code.
77 XenHypercallMemoryOp (
78 IN XENBUS_DEVICE
*Dev
,
80 IN OUT VOID
*Arguments
84 Do an operation on the event channels.
86 @param Dev A XENBUS_DEVICE instance.
87 @param Operation The operation number, e.g. EVTCHNOP_send.
88 @param Arguments The argument associated to the operation.
90 @return Return the return value from the hypercall, 0 in case of success
91 otherwise, an error code.
94 XenHypercallEventChannelOp (
95 IN XENBUS_DEVICE
*Dev
,
97 IN OUT VOID
*Arguments
101 Map the shared_info_t page into memory.
103 @param Dev A XENBUS_DEVICE instance.
105 @retval EFI_SUCCESS Dev->SharedInfo whill contain a pointer to
107 @retval EFI_LOAD_ERROR The shared info page could not be mapped. The
108 hypercall returned an error.
111 XenGetSharedInfoPage (
112 IN OUT XENBUS_DEVICE
*Dev