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3eb9473e | 1 | /*++\r |
2 | \r | |
3bbe68a3 | 3 | Copyright (c) 2004 - 2012, Intel Corporation. All rights reserved.<BR>\r |
2c7e5c2f | 4 | This program and the accompanying materials \r |
3eb9473e | 5 | are licensed and made available under the terms and conditions of the BSD License \r |
6 | which accompanies this distribution. The full text of the license may be found at \r | |
7 | http://opensource.org/licenses/bsd-license.php \r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
11 | \r | |
12 | \r | |
13 | Module Name:\r | |
14 | \r | |
15 | EsalServiceLib.c\r | |
16 | \r | |
17 | Abstract:\r | |
18 | \r | |
19 | --*/\r | |
20 | \r | |
21 | #include <Ipf/IpfDefines.h>\r | |
22 | \r | |
23 | #include "EdkIIGlueDxe.h"\r | |
24 | \r | |
25 | EXTENDED_SAL_BOOT_SERVICE_PROTOCOL *mEsalBootService = NULL;\r | |
26 | EFI_PLABEL mPlabel;\r | |
27 | \r | |
c7f33ca4 | 28 | STATIC\r |
3eb9473e | 29 | EFI_STATUS\r |
30 | EFIAPI\r | |
31 | DxeSalLibInitialize (\r | |
32 | VOID\r | |
33 | )\r | |
34 | {\r | |
35 | EFI_PLABEL *Plabel;\r | |
36 | EFI_STATUS Status;\r | |
37 | \r | |
38 | if (mEsalBootService != NULL) {\r | |
39 | return EFI_SUCCESS;\r | |
40 | }\r | |
41 | \r | |
42 | //\r | |
43 | // The protocol contains a function pointer, which is an indirect procedure call.\r | |
44 | // An indirect procedure call goes through a plabel, and pointer to a function is\r | |
45 | // a pointer to a plabel. To implement indirect procedure calls that can work in\r | |
46 | // both physical and virtual mode, two plabels are required (one physical and one\r | |
47 | // virtual). So lets grap the physical PLABEL for the EsalEntryPoint and store it\r | |
48 | // away. We cache it in a module global, so we can register the vitrual version.\r | |
49 | //\r | |
c7f33ca4 | 50 | Status = gBS->LocateProtocol (&gEfiExtendedSalBootServiceProtocolGuid, NULL, (VOID **) &mEsalBootService);\r |
3eb9473e | 51 | if (EFI_ERROR (Status)) {\r |
52 | mEsalBootService = NULL;\r | |
53 | return EFI_SUCCESS;\r | |
54 | }\r | |
55 | \r | |
56 | Plabel = (EFI_PLABEL *) (UINTN) mEsalBootService->ExtendedSalProc;\r | |
57 | \r | |
58 | mPlabel.EntryPoint = Plabel->EntryPoint;\r | |
59 | mPlabel.GP = Plabel->GP;\r | |
60 | SetEsalPhysicalEntryPoint (mPlabel.EntryPoint, mPlabel.GP);\r | |
61 | \r | |
62 | return EFI_SUCCESS;\r | |
63 | }\r | |
64 | \r | |
3eb9473e | 65 | EFI_STATUS\r |
66 | EFIAPI\r | |
67 | RegisterEsalFunction (\r | |
68 | IN UINT64 FunctionId,\r | |
69 | IN EFI_GUID *ClassGuid,\r | |
70 | IN SAL_INTERNAL_EXTENDED_SAL_PROC Function,\r | |
71 | IN VOID *ModuleGlobal\r | |
72 | )\r | |
73 | /*++\r | |
74 | \r | |
75 | Routine Description:\r | |
76 | \r | |
77 | Register ESAL Class Function and it's asociated global.\r | |
78 | This function is boot service only!\r | |
79 | \r | |
80 | Arguments:\r | |
81 | FunctionId - ID of function to register\r | |
c7f33ca4 | 82 | ClassGuid - GUID of function class\r |
3eb9473e | 83 | Function - Function to register under ClassGuid/FunctionId pair\r |
84 | ModuleGlobal - Module global for Function.\r | |
85 | \r | |
c7f33ca4 | 86 | Returns:\r |
3eb9473e | 87 | EFI_SUCCESS - If ClassGuid/FunctionId Function was registered.\r |
88 | \r | |
89 | --*/\r | |
90 | {\r | |
91 | DxeSalLibInitialize ();\r | |
92 | return mEsalBootService->AddExtendedSalProc (\r | |
93 | mEsalBootService,\r | |
94 | ClassGuid,\r | |
95 | FunctionId,\r | |
96 | Function,\r | |
97 | ModuleGlobal\r | |
98 | );\r | |
99 | }\r | |
100 | \r | |
101 | EFI_STATUS\r | |
102 | EFIAPI\r | |
103 | RegisterEsalClass (\r | |
104 | IN EFI_GUID *ClassGuid,\r | |
105 | IN VOID *ModuleGlobal,\r | |
106 | ...\r | |
107 | )\r | |
108 | /*++\r | |
109 | \r | |
110 | Routine Description:\r | |
111 | \r | |
112 | Register ESAL Class and it's asociated global.\r | |
113 | This function is boot service only!\r | |
114 | \r | |
115 | Arguments:\r | |
c7f33ca4 | 116 | ClassGuid - GUID of function class\r |
3eb9473e | 117 | ModuleGlobal - Module global for Function.\r |
c7f33ca4 | 118 | ... - SAL_INTERNAL_EXTENDED_SAL_PROC and FunctionId pairs. NULL\r |
3eb9473e | 119 | indicates the end of the list.\r |
120 | \r | |
c7f33ca4 | 121 | Returns:\r |
3eb9473e | 122 | EFI_SUCCESS - All members of ClassGuid registered\r |
123 | \r | |
124 | --*/\r | |
125 | {\r | |
126 | VA_LIST Args;\r | |
127 | EFI_STATUS Status;\r | |
128 | SAL_INTERNAL_EXTENDED_SAL_PROC Function;\r | |
129 | UINT64 FunctionId;\r | |
130 | EFI_HANDLE NewHandle;\r | |
131 | \r | |
132 | VA_START (Args, ModuleGlobal);\r | |
133 | \r | |
134 | Status = EFI_SUCCESS;\r | |
135 | while (!EFI_ERROR (Status)) {\r | |
136 | Function = (SAL_INTERNAL_EXTENDED_SAL_PROC) VA_ARG (Args, SAL_INTERNAL_EXTENDED_SAL_PROC);\r | |
137 | if (Function == NULL) {\r | |
138 | break;\r | |
139 | }\r | |
140 | \r | |
141 | FunctionId = VA_ARG (Args, UINT64);\r | |
142 | \r | |
143 | Status = RegisterEsalFunction (FunctionId, ClassGuid, Function, ModuleGlobal);\r | |
144 | }\r | |
145 | \r | |
3bbe68a3 | 146 | VA_END (Args);\r |
147 | \r | |
3eb9473e | 148 | if (EFI_ERROR (Status)) {\r |
149 | return Status;\r | |
150 | }\r | |
151 | \r | |
152 | NewHandle = NULL;\r | |
153 | return gBS->InstallProtocolInterface (\r | |
154 | &NewHandle,\r | |
155 | ClassGuid,\r | |
156 | EFI_NATIVE_INTERFACE,\r | |
157 | NULL\r | |
158 | );\r | |
159 | }\r | |
160 | \r | |
161 | SAL_RETURN_REGS\r | |
162 | EFIAPI\r | |
163 | EfiCallEsalService (\r | |
164 | IN EFI_GUID *ClassGuid,\r | |
165 | IN UINT64 FunctionId,\r | |
166 | IN UINT64 Arg2,\r | |
167 | IN UINT64 Arg3,\r | |
168 | IN UINT64 Arg4,\r | |
169 | IN UINT64 Arg5,\r | |
170 | IN UINT64 Arg6,\r | |
171 | IN UINT64 Arg7,\r | |
172 | IN UINT64 Arg8\r | |
173 | )\r | |
174 | /*++\r | |
175 | \r | |
176 | Routine Description:\r | |
177 | \r | |
c7f33ca4 | 178 | Call module that is not linked direclty to this module. This code is IP\r |
3eb9473e | 179 | relative and hides the binding issues of virtual or physical calling. The\r |
180 | function that gets dispatched has extra arguments that include the registered\r | |
181 | module global and a boolean flag to indicate if the system is in virutal mode.\r | |
182 | \r | |
183 | Arguments:\r | |
184 | ClassGuid - GUID of function\r | |
185 | FunctionId - Function in ClassGuid to call\r | |
186 | Arg2 - Argument 2 ClassGuid/FunctionId defined\r | |
187 | Arg3 - Argument 3 ClassGuid/FunctionId defined\r | |
188 | Arg4 - Argument 4 ClassGuid/FunctionId defined\r | |
189 | Arg5 - Argument 5 ClassGuid/FunctionId defined\r | |
190 | Arg6 - Argument 6 ClassGuid/FunctionId defined\r | |
191 | Arg7 - Argument 7 ClassGuid/FunctionId defined\r | |
192 | Arg8 - Argument 8 ClassGuid/FunctionId defined\r | |
193 | \r | |
c7f33ca4 | 194 | Returns:\r |
3eb9473e | 195 | Status of ClassGuid/FuncitonId\r |
196 | \r | |
197 | --*/\r | |
198 | {\r | |
199 | SAL_RETURN_REGS ReturnReg;\r | |
200 | SAL_EXTENDED_SAL_PROC EsalProc;\r | |
201 | \r | |
202 | ReturnReg = GetEsalEntryPoint ();\r | |
203 | if (ReturnReg.Status != EFI_SAL_SUCCESS) {\r | |
204 | return ReturnReg;\r | |
205 | }\r | |
206 | \r | |
207 | //\r | |
208 | // Look at the physical mode ESAL entry point to determine of the ESAL entry point has been initialized\r | |
209 | //\r | |
210 | if (*(UINT64 *)ReturnReg.r9 == 0 && *(UINT64 *)(ReturnReg.r9 + 8) == 0) {\r | |
211 | //\r | |
212 | // Both the function ponter and the GP value are zero, so attempt to initialize the ESAL Entry Point\r | |
213 | //\r | |
214 | DxeSalLibInitialize ();\r | |
215 | ReturnReg = GetEsalEntryPoint ();\r | |
216 | if (ReturnReg.Status != EFI_SAL_SUCCESS) {\r | |
217 | return ReturnReg;\r | |
218 | }\r | |
219 | if (*(UINT64 *)ReturnReg.r9 == 0 && *(UINT64 *)(ReturnReg.r9 + 8) == 0) {\r | |
220 | //\r | |
221 | // The ESAL Entry Point could not be initialized\r | |
222 | //\r | |
223 | ReturnReg.Status = EFI_SAL_ERROR;\r | |
224 | return ReturnReg;\r | |
225 | }\r | |
226 | }\r | |
227 | \r | |
228 | if (ReturnReg.r11 & PSR_IT_MASK) {\r | |
229 | //\r | |
230 | // Virtual mode plabel to entry point\r | |
231 | //\r | |
232 | EsalProc = (SAL_EXTENDED_SAL_PROC) ReturnReg.r10;\r | |
233 | } else {\r | |
234 | //\r | |
235 | // Physical mode plabel to entry point\r | |
236 | //\r | |
237 | EsalProc = (SAL_EXTENDED_SAL_PROC) ReturnReg.r9;\r | |
238 | }\r | |
239 | \r | |
240 | return EsalProc (\r | |
241 | ClassGuid,\r | |
242 | FunctionId,\r | |
243 | Arg2,\r | |
244 | Arg3,\r | |
245 | Arg4,\r | |
246 | Arg5,\r | |
247 | Arg6,\r | |
248 | Arg7,\r | |
249 | Arg8\r | |
250 | );\r | |
251 | }\r |