MdeModulePkg/SetupBrowserDxe: Fix incorrect local variable used
[mirror_edk2.git] / OvmfPkg / Include / Library / XenHypercallLib.h
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1/** @file\r
2 Functions declarations to make Xen hypercalls.\r
3\r
4 Copyright (C) 2014, Citrix Ltd.\r
5\r
6 This program and the accompanying materials\r
7 are licensed and made available under the terms and conditions of the BSD License\r
8 which accompanies this distribution. The full text of the license may be found at\r
9 http://opensource.org/licenses/bsd-license.php\r
10\r
11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
13\r
14**/\r
15\r
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16#ifndef __XEN_HYPERCALL_LIB_H__\r
17#define __XEN_HYPERCALL_LIB_H__\r
abcbbb14 18\r
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19/**\r
20 Check if the Xen Hypercall library is able to make calls to the Xen\r
21 hypervisor.\r
22\r
23 Client code should call further functions in this library only if, and after,\r
24 this function returns TRUE.\r
25\r
26 @retval TRUE Hypercalls are available.\r
27 @retval FALSE Hypercalls are not available.\r
28**/\r
29BOOLEAN\r
30EFIAPI\r
31XenHypercallIsAvailable (\r
32 VOID\r
33 );\r
34\r
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35/**\r
36 This function will put the two arguments in the right place (registers) and\r
bbc3758a 37 invoke the hypercall identified by HypercallID.\r
abcbbb14 38\r
bbc3758a 39 @param HypercallID The symbolic ID of the hypercall to be invoked\r
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40 @param Arg1 First argument.\r
41 @param Arg2 Second argument.\r
42\r
43 @return Return 0 if success otherwise it return an errno.\r
44**/\r
45INTN\r
46EFIAPI\r
47XenHypercall2 (\r
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48 IN UINTN HypercallID,\r
49 IN OUT INTN Arg1,\r
50 IN OUT INTN Arg2\r
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51 );\r
52\r
53/**\r
54 Return the value of the HVM parameter Index.\r
55\r
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56 @param Index The parameter to get, e.g. HVM_PARAM_STORE_EVTCHN.\r
57\r
58 @return The value of the asked parameter or 0 in case of error.\r
59**/\r
60UINT64\r
61XenHypercallHvmGetParam (\r
cec6ad0a 62 UINT32 Index\r
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63 );\r
64\r
65/**\r
66 Hypercall to do different operation on the memory.\r
67\r
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68 @param Operation The operation number, e.g. XENMEM_add_to_physmap.\r
69 @param Arguments The arguments associated to the operation.\r
70\r
71 @return Return the return value from the hypercall, 0 in case of success\r
72 otherwise, an error code.\r
73**/\r
74INTN\r
75XenHypercallMemoryOp (\r
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76 IN UINTN Operation,\r
77 IN OUT VOID *Arguments\r
78 );\r
79\r
80/**\r
81 Do an operation on the event channels.\r
82\r
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83 @param Operation The operation number, e.g. EVTCHNOP_send.\r
84 @param Arguments The argument associated to the operation.\r
85\r
86 @return Return the return value from the hypercall, 0 in case of success\r
87 otherwise, an error code.\r
88**/\r
89INTN\r
90XenHypercallEventChannelOp (\r
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91 IN INTN Operation,\r
92 IN OUT VOID *Arguments\r
93 );\r
94\r
abcbbb14 95#endif\r