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1/** @file\r
2 EFI Debug Library that installs Debug Level Protocol.\r
3\r
4 Copyright (c) 2006, Intel Corporation<BR>\r
5 All rights reserved. This program and the accompanying materials\r
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
9\r
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
12\r
13**/\r
14\r
15STATIC BOOLEAN mDebugLevelInstalled = FALSE;\r
16STATIC EFI_DEBUG_LEVEL_PROTOCOL mDebugLevel = { 0 };\r
17\r
18/**\r
19 Installs Debug Level Protocol.\r
20 \r
21 The constructor function installs Debug Level Protocol on the ImageHandle.\r
22 It will ASSERT() if the installation fails and will always return EFI_SUCCESS. \r
23\r
24 @param ImageHandle The firmware allocated handle for the EFI image.\r
25 @param SystemTable A pointer to the EFI System Table.\r
26 \r
27 @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.\r
28\r
29**/\r
30EFI_STATUS\r
31EFIAPI\r
32DebugLibConstructor (\r
33 IN EFI_HANDLE ImageHandle,\r
34 IN EFI_SYSTEM_TABLE *SystemTable\r
35 )\r
36{\r
37 EFI_STATUS Status;\r
38\r
39 //\r
40 // Initialize Debug Level Protocol.\r
41 //\r
42 mDebugLevel.DebugLevel = PcdGet32(PcdDebugPrintErrorLevel);\r
43\r
44 //\r
45 // Install Debug Level Protocol. \r
46 //\r
47 Status = gBS->InstallMultipleProtocolInterfaces (\r
48 &ImageHandle,\r
49 &gEfiDebugLevelProtocolGuid,\r
50 &mDebugLevel,\r
51 NULL\r
52 );\r
53 ASSERT_EFI_ERROR (Status);\r
54\r
55 //\r
56 // Set flag to show that the Debug Level Protocol has been installed.\r
57 //\r
58 mDebugLevelInstalled = TRUE;\r
59\r
60 return Status;\r
61}\r
62\r
63/**\r
64\r
65 Prints a debug message to the debug output device if the specified error level is enabled.\r
66\r
67 If any bit in ErrorLevel is also set in PcdDebugPrintErrorLevel, then print \r
68 the message specified by Format and the associated variable argument list to \r
69 the debug output device.\r
70\r
71 If Format is NULL, then ASSERT().\r
72\r
73 @param ErrorLevel The error level of the debug message.\r
74 @param Format Format string for the debug message to print.\r
75\r
76**/\r
77VOID\r
78EFIAPI\r
79DebugPrint (\r
80 IN UINTN ErrorLevel,\r
81 IN CONST CHAR8 *Format,\r
82 ...\r
83 )\r
84{\r
85 UINT64 Buffer[EFI_STATUS_CODE_DATA_MAX_SIZE / sizeof (UINT64)];\r
86 EFI_DEBUG_INFO *DebugInfo;\r
87 UINTN TotalSize;\r
88 UINTN Index;\r
89 VA_LIST Marker;\r
90 UINT64 *ArgumentPointer;\r
91\r
92 //\r
93 // If Format is NULL, then ASSERT().\r
94 //\r
95 ASSERT (Format != NULL);\r
96\r
97 //\r
98 // Check driver Debug Level value and global debug level\r
99 //\r
100 if (mDebugLevelInstalled) {\r
101 if ((ErrorLevel & mDebugLevel.DebugLevel) == 0) {\r
102 return;\r
103 }\r
104 } else {\r
105 if ((ErrorLevel & PcdGet32(PcdDebugPrintErrorLevel)) == 0) {\r
106 return;\r
107 }\r
108 }\r
109\r
110 TotalSize = sizeof (EFI_DEBUG_INFO) + 12 * sizeof (UINT64) + AsciiStrLen (Format) + 1;\r
111 if (TotalSize > EFI_STATUS_CODE_DATA_MAX_SIZE) {\r
112 return;\r
113 }\r
114\r
115 //\r
116 // Then EFI_DEBUG_INFO\r
117 //\r
118 DebugInfo = (EFI_DEBUG_INFO *)Buffer;\r
119 DebugInfo->ErrorLevel = (UINT32)ErrorLevel;\r
120\r
121 //\r
122 // 256 byte mini Var Arg stack. That is followed by the format string.\r
123 //\r
124 VA_START (Marker, Format);\r
125 for (Index = 0, ArgumentPointer = (UINT64 *)(DebugInfo + 1); Index < 12; Index++, ArgumentPointer++) {\r
126 *ArgumentPointer = VA_ARG (Marker, UINT64);\r
127 }\r
128 VA_END (Marker);\r
129 AsciiStrCpy ((CHAR8 *)ArgumentPointer, Format);\r
130\r
131 REPORT_STATUS_CODE_EX (\r
132 EFI_DEBUG_CODE,\r
133 (EFI_SOFTWARE_DXE_BS_DRIVER | EFI_DC_UNSPECIFIED),\r
134 0,\r
135 NULL,\r
136 &gEfiStatusCodeDataTypeDebugGuid,\r
137 DebugInfo,\r
138 TotalSize\r
139 );\r
140}\r
141\r
142\r
143/**\r
144\r
145 Prints an assert message containing a filename, line number, and description. \r
146 This may be followed by a breakpoint or a dead loop.\r
147\r
148 Print a message of the form "ASSERT <FileName>(<LineNumber>): <Description>\n" \r
149 to the debug output device. If DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED bit of \r
150 PcdDebugProperyMask is set then CpuBreakpoint() is called. Otherwise, if \r
151 DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED bit of PcdDebugProperyMask is set then \r
152 CpuDeadLoop() is called. If neither of these bits are set, then this function \r
153 returns immediately after the message is printed to the debug output device.\r
154 DebugAssert() must actively prevent recusrsion. If DebugAssert() is called while\r
155 processing another DebugAssert(), then DebugAssert() must return immediately.\r
156\r
157 If FileName is NULL, then a <FileName> string of "(NULL) Filename" is printed.\r
158\r
159 If Description is NULL, then a <Description> string of "(NULL) Description" is printed.\r
160\r
161 @param FileName Pointer to the name of the source file that generated the assert condition.\r
162 @param LineNumber The line number in the source file that generated the assert condition\r
163 @param Description Pointer to the description of the assert condition.\r
164\r
165**/\r
166VOID\r
167EFIAPI\r
168DebugAssert (\r
169 IN CONST CHAR8 *FileName,\r
170 IN UINTN LineNumber,\r
171 IN CONST CHAR8 *Description\r
172 )\r
173{\r
174 UINT64 Buffer[EFI_STATUS_CODE_DATA_MAX_SIZE / sizeof(UINT64)];\r
175 EFI_DEBUG_ASSERT_DATA *AssertData;\r
176 UINTN TotalSize;\r
177 CHAR8 *Temp;\r
178\r
179 //\r
180 // Make sure it will all fit in the passed in buffer.\r
181 //\r
182 TotalSize = sizeof (EFI_DEBUG_ASSERT_DATA) + AsciiStrLen (FileName) + 1 + AsciiStrLen (Description) + 1;\r
183 if (TotalSize <= EFI_STATUS_CODE_DATA_MAX_SIZE) {\r
184 //\r
185 // Fill in EFI_DEBUG_ASSERT_DATA\r
186 //\r
187 AssertData = (EFI_DEBUG_ASSERT_DATA *)Buffer;\r
188 AssertData->LineNumber = (UINT32)LineNumber;\r
189\r
190 //\r
191 // Copy Ascii FileName including NULL.\r
192 //\r
193 Temp = AsciiStrCpy ((CHAR8 *)(AssertData + 1), FileName);\r
194\r
195 //\r
196 // Copy Ascii Description. \r
197 //\r
198 AsciiStrCpy (Temp + AsciiStrLen (FileName) + 1, Description);\r
199\r
200 REPORT_STATUS_CODE_WITH_EXTENDED_DATA (\r
201 (EFI_ERROR_CODE | EFI_ERROR_UNRECOVERED),\r
202 (EFI_SOFTWARE_DXE_BS_DRIVER | EFI_SW_EC_ILLEGAL_SOFTWARE_STATE),\r
203 AssertData,\r
204 TotalSize\r
205 );\r
206 }\r
207\r
208 //\r
209 // Generate a Breakpoint, DeadLoop, or NOP based on PCD settings\r
210 //\r
211 if ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED) != 0) {\r
212 CpuBreakpoint ();\r
213 } else if ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED) != 0) {\r
214 CpuDeadLoop ();\r
215 }\r
216}\r
217\r
218\r
219/**\r
220\r
221 Fills a target buffer with PcdDebugClearMemoryValue, and returns the target buffer.\r
222\r
223 This function fills Length bytes of Buffer with the value specified by \r
224 PcdDebugClearMemoryValue, and returns Buffer.\r
225\r
226 If Buffer is NULL, then ASSERT().\r
227\r
228