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1 | /** @file\r |
2 | Top level C file for debug support driver. Contains initialization function.\r |
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3 | \r |
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4 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r |
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5 | This program and the accompanying materials\r |
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6 | are licensed and made available under the terms and conditions of the BSD License\r |
7 | which accompanies this distribution. The full text of the license may be found at\r |
8 | http://opensource.org/licenses/bsd-license.php\r |
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9 | \r |
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10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r |
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12 | \r |
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13 | **/\r |
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14 | \r |
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15 | #include "PlDebugSupport.h"\r |
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16 | \r |
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17 | EFI_DEBUG_SUPPORT_PROTOCOL mDebugSupportProtocolInterface = {\r |
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18 | EFI_ISA,\r |
19 | GetMaximumProcessorIndex,\r |
20 | RegisterPeriodicCallback,\r |
21 | RegisterExceptionCallback,\r |
22 | InvalidateInstructionCache\r |
23 | };\r |
24 | \r |
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25 | \r |
26 | /**\r |
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27 | Debug Support Driver entry point.\r |
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28 | \r |
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29 | Checks to see if there's not already a Debug Support protocol installed for\r |
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30 | the selected processor before installing it.\r |
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31 | \r |
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32 | @param[in] ImageHandle The firmware allocated handle for the EFI image.\r |
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33 | @param[in] SystemTable A pointer to the EFI System Table.\r |
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34 | \r |
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35 | @retval EFI_SUCCESS The entry point is executed successfully.\r |
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36 | @retval EFI_ALREADY_STARTED Debug Support protocol is installed already.\r |
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37 | @retval other Some error occurs when executing this entry point.\r |
38 | \r |
39 | **/\r |
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40 | EFI_STATUS\r |
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41 | EFIAPI\r |
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42 | InitializeDebugSupportDriver (\r |
43 | IN EFI_HANDLE ImageHandle,\r |
44 | IN EFI_SYSTEM_TABLE *SystemTable\r |
45 | )\r |
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46 | {\r |
47 | EFI_LOADED_IMAGE_PROTOCOL *LoadedImageProtocolPtr;\r |
48 | EFI_STATUS Status;\r |
49 | EFI_HANDLE Handle;\r |
50 | EFI_HANDLE *HandlePtr;\r |
51 | UINTN NumHandles;\r |
52 | EFI_DEBUG_SUPPORT_PROTOCOL *DebugSupportProtocolPtr;\r |
53 | \r |
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54 | //\r |
55 | // First check to see that the debug support protocol for this processor\r |
56 | // type is not already installed\r |
57 | //\r |
58 | Status = gBS->LocateHandleBuffer (\r |
59 | ByProtocol,\r |
60 | &gEfiDebugSupportProtocolGuid,\r |
61 | NULL,\r |
62 | &NumHandles,\r |
63 | &HandlePtr\r |
64 | );\r |
65 | \r |
66 | if (Status != EFI_NOT_FOUND) {\r |
67 | do {\r |
68 | NumHandles--;\r |
69 | Status = gBS->OpenProtocol (\r |
70 | HandlePtr[NumHandles],\r |
71 | &gEfiDebugSupportProtocolGuid,\r |
72 | (VOID **) &DebugSupportProtocolPtr,\r |
73 | ImageHandle,\r |
74 | NULL,\r |
75 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r |
76 | );\r |
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77 | if ((Status == EFI_SUCCESS) && (DebugSupportProtocolPtr->Isa == EFI_ISA)) {\r |
78 | //\r |
79 | // a Debug Support protocol has been installed for this processor\r |
80 | //\r |
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81 | FreePool (HandlePtr);\r |
82 | Status = EFI_ALREADY_STARTED;\r |
83 | goto ErrExit;\r |
84 | }\r |
85 | } while (NumHandles > 0);\r |
86 | FreePool (HandlePtr);\r |
87 | }\r |
88 | \r |
89 | //\r |
90 | // Get our image information and install platform specific unload handler\r |
91 | //\r |
92 | Status = gBS->OpenProtocol (\r |
93 | ImageHandle,\r |
94 | &gEfiLoadedImageProtocolGuid,\r |
95 | (VOID **) &LoadedImageProtocolPtr,\r |
96 | ImageHandle,\r |
97 | NULL,\r |
98 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r |
99 | );\r |
100 | ASSERT (!EFI_ERROR (Status));\r |
101 | if (Status != EFI_SUCCESS) {\r |
102 | goto ErrExit;\r |
103 | }\r |
104 | \r |
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105 | LoadedImageProtocolPtr->Unload = PlUnloadDebugSupportDriver;\r |
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106 | \r |
107 | //\r |
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108 | // Call hook for processor specific initialization\r |
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109 | //\r |
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110 | Status = PlInitializeDebugSupportDriver ();\r |
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111 | ASSERT (!EFI_ERROR (Status));\r |
112 | if (Status != EFI_SUCCESS) {\r |
113 | goto ErrExit;\r |
114 | }\r |
115 | \r |
116 | //\r |
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117 | // Install Debug Support protocol to new handle\r |
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118 | //\r |
119 | Handle = NULL;\r |
120 | Status = gBS->InstallProtocolInterface (\r |
121 | &Handle,\r |
122 | &gEfiDebugSupportProtocolGuid,\r |
123 | EFI_NATIVE_INTERFACE,\r |
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124 | &mDebugSupportProtocolInterface\r |
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125 | );\r |
126 | ASSERT (!EFI_ERROR (Status));\r |
127 | if (Status != EFI_SUCCESS) {\r |
128 | goto ErrExit;\r |
129 | }\r |
130 | \r |
131 | ErrExit:\r |
132 | return Status;\r |
133 | }\r |