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7bc232b2 1/** @file\r
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2 Base Debug library instance base on Serial Port library.\r
3 It uses PrintLib to send debug messages to serial port device.\r
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4\r
5 NOTE: If the Serial Port library enables hardware flow control, then a call\r
6 to DebugPrint() or DebugAssert() may hang if writes to the serial port are\r
ccc96db9 7 being blocked. This may occur if a key(s) are pressed in a terminal emulator\r
9095d37b 8 used to monitor the DEBUG() and ASSERT() messages.\r
7bc232b2 9\r
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10 Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
11 This program and the accompanying materials\r
12 are licensed and made available under the terms and conditions of the BSD License\r
13 which accompanies this distribution. The full text of the license may be found at\r
14 http://opensource.org/licenses/bsd-license.php.\r
7bc232b2 15\r
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16 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
17 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
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18\r
19**/\r
20\r
0eeb6d1f 21#include <Base.h>\r
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22#include <Library/DebugLib.h>\r
23#include <Library/BaseLib.h>\r
24#include <Library/PrintLib.h>\r
25#include <Library/PcdLib.h>\r
26#include <Library/BaseMemoryLib.h>\r
27#include <Library/SerialPortLib.h>\r
2891fc8b 28#include <Library/DebugPrintErrorLevelLib.h>\r
859b72fa 29\r
7bc232b2 30//\r
9095d37b 31// Define the maximum debug and assert message length that this library supports\r
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32//\r
33#define MAX_DEBUG_MESSAGE_LENGTH 0x100\r
34\r
ccc96db9 35/**\r
36 The constructor function initialize the Serial Port Library\r
37\r
38 @retval EFI_SUCCESS The constructor always returns RETURN_SUCCESS.\r
39\r
40**/\r
41RETURN_STATUS\r
42EFIAPI\r
43BaseDebugLibSerialPortConstructor (\r
44 VOID\r
45 )\r
46{\r
47 return SerialPortInitialize ();\r
48}\r
49\r
7bc232b2 50/**\r
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51 Prints a debug message to the debug output device if the specified error level is enabled.\r
52\r
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53 If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function\r
54 GetDebugPrintErrorLevel (), then print the message specified by Format and the\r
2891fc8b 55 associated variable argument list to the debug output device.\r
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56\r
57 If Format is NULL, then ASSERT().\r
58\r
59 @param ErrorLevel The error level of the debug message.\r
60 @param Format Format string for the debug message to print.\r
9095d37b 61 @param ... Variable argument list whose contents are accessed\r
285010e7 62 based on the format string specified by Format.\r
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63\r
64**/\r
65VOID\r
66EFIAPI\r
67DebugPrint (\r
68 IN UINTN ErrorLevel,\r
69 IN CONST CHAR8 *Format,\r
70 ...\r
71 )\r
72{\r
73 CHAR8 Buffer[MAX_DEBUG_MESSAGE_LENGTH];\r
74 VA_LIST Marker;\r
75\r
76 //\r
77 // If Format is NULL, then ASSERT().\r
78 //\r
79 ASSERT (Format != NULL);\r
80\r
81 //\r
82 // Check driver debug mask value and global mask\r
83 //\r
2891fc8b 84 if ((ErrorLevel & GetDebugPrintErrorLevel ()) == 0) {\r
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85 return;\r
86 }\r
87\r
88 //\r
89 // Convert the DEBUG() message to an ASCII String\r
90 //\r
91 VA_START (Marker, Format);\r
92 AsciiVSPrint (Buffer, sizeof (Buffer), Format, Marker);\r
93 VA_END (Marker);\r
94\r
95 //\r
9095d37b 96 // Send the print string to a Serial Port\r
7bc232b2 97 //\r
ccc96db9 98 SerialPortWrite ((UINT8 *)Buffer, AsciiStrLen (Buffer));\r
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99}\r
100\r
101\r
102/**\r
9095d37b 103 Prints an assert message containing a filename, line number, and description.\r
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104 This may be followed by a breakpoint or a dead loop.\r
105\r
3e5c3238 106 Print a message of the form "ASSERT <FileName>(<LineNumber>): <Description>\n"\r
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107 to the debug output device. If DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED bit of\r
108 PcdDebugProperyMask is set then CpuBreakpoint() is called. Otherwise, if\r
109 DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED bit of PcdDebugProperyMask is set then\r
110 CpuDeadLoop() is called. If neither of these bits are set, then this function\r
7bc232b2 111 returns immediately after the message is printed to the debug output device.\r
3e5c3238 112 DebugAssert() must actively prevent recursion. If DebugAssert() is called while\r
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113 processing another DebugAssert(), then DebugAssert() must return immediately.\r
114\r
115 If FileName is NULL, then a <FileName> string of "(NULL) Filename" is printed.\r
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116 If Description is NULL, then a <Description> string of "(NULL) Description" is printed.\r
117\r
2fc59a00 118 @param FileName The pointer to the name of the source file that generated the assert condition.\r
7bc232b2 119 @param LineNumber The line number in the source file that generated the assert condition\r
2fc59a00 120 @param Description The pointer to the description of the assert condition.\r
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121\r
122**/\r
123VOID\r
124EFIAPI\r
125DebugAssert (\r
126 IN CONST CHAR8 *FileName,\r
127 IN UINTN LineNumber,\r
128 IN CONST CHAR8 *Description\r
129 )\r
130{\r
131 CHAR8 Buffer[MAX_DEBUG_MESSAGE_LENGTH];\r
132\r
133 //\r
7c366ec9 134 // Generate the ASSERT() message in Ascii format\r
7bc232b2 135 //\r
aa0a5149 136 AsciiSPrint (Buffer, sizeof (Buffer), "ASSERT [%a] %a(%d): %a\n", gEfiCallerBaseName, FileName, LineNumber, Description);\r
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137\r
138 //\r
139 // Send the print string to the Console Output device\r
140 //\r
ccc96db9 141 SerialPortWrite ((UINT8 *)Buffer, AsciiStrLen (Buffer));\r
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142\r
143 //\r
144 // Generate a Breakpoint, DeadLoop, or NOP based on PCD settings\r
145 //\r
146 if ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED) != 0) {\r
147 CpuBreakpoint ();\r
148 } else if ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED) != 0) {\r
149 CpuDeadLoop ();\r
150 }\r
151}\r
152\r
153\r
154/**\r
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155 Fills a target buffer with PcdDebugClearMemoryValue, and returns the target buffer.\r
156\r
9095d37b 157 This function fills Length bytes of Buffer with the value specified by\r
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158 PcdDebugClearMemoryValue, and returns Buffer.\r
159\r
160 If Buffer is NULL, then ASSERT().\r
9095d37b 161 If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r
7bc232b2 162\r
2fc59a00 163 @param Buffer The pointer to the target buffer to be filled with PcdDebugClearMemoryValue.\r
9095d37b 164 @param Length The number of bytes in Buffer to fill with zeros PcdDebugClearMemoryValue.\r
7bc232b2 165\r
2fc59a00 166 @return Buffer The pointer to the target buffer filled with PcdDebugClearMemoryValue.\r
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167\r
168**/\r
169VOID *\r
170EFIAPI\r
171DebugClearMemory (\r
172 OUT VOID *Buffer,\r
173 IN UINTN Length\r
174 )\r
175{\r
176 //\r
177 // If Buffer is NULL, then ASSERT().\r
178 //\r
179 ASSERT (Buffer != NULL);\r
180\r
181 //\r
182 // SetMem() checks for the the ASSERT() condition on Length and returns Buffer\r
183 //\r
184 return SetMem (Buffer, Length, PcdGet8(PcdDebugClearMemoryValue));\r
185}\r
186\r
187\r
188/**\r
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189 Returns TRUE if ASSERT() macros are enabled.\r
190\r
9095d37b 191 This function returns TRUE if the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of\r
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192 PcdDebugProperyMask is set. Otherwise FALSE is returned.\r
193\r
194 @retval TRUE The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is set.\r
195 @retval FALSE The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is clear.\r
196\r
197**/\r
198BOOLEAN\r
199EFIAPI\r
200DebugAssertEnabled (\r
201 VOID\r
202 )\r
203{\r
204 return (BOOLEAN) ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED) != 0);\r
205}\r
206\r
207\r
9095d37b 208/**\r
3e5c3238 209 Returns TRUE if DEBUG() macros are enabled.\r
7bc232b2 210\r
9095d37b 211 This function returns TRUE if the DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of\r
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212 PcdDebugProperyMask is set. Otherwise FALSE is returned.\r
213\r
214 @retval TRUE The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is set.\r
215 @retval FALSE The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is clear.\r
216\r
217**/\r
218BOOLEAN\r
219EFIAPI\r
220DebugPrintEnabled (\r
221 VOID\r
222 )\r
223{\r
224 return (BOOLEAN) ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_PRINT_ENABLED) != 0);\r
225}\r
226\r
227\r
9095d37b 228/**\r
3e5c3238 229 Returns TRUE if DEBUG_CODE() macros are enabled.\r
7bc232b2 230\r
9095d37b 231 This function returns TRUE if the DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of\r
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232 PcdDebugProperyMask is set. Otherwise FALSE is returned.\r
233\r
234 @retval TRUE The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is set.\r
235 @retval FALSE The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is clear.\r
236\r
237**/\r
238BOOLEAN\r
239EFIAPI\r
240DebugCodeEnabled (\r
241 VOID\r
242 )\r
243{\r
244 return (BOOLEAN) ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_CODE_ENABLED) != 0);\r
245}\r
246\r
247\r
9095d37b 248/**\r
3e5c3238 249 Returns TRUE if DEBUG_CLEAR_MEMORY() macro is enabled.\r
7bc232b2 250\r
9095d37b 251 This function returns TRUE if the DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of\r
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252 PcdDebugProperyMask is set. Otherwise FALSE is returned.\r
253\r
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254 @retval TRUE The DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is set.\r
255 @retval FALSE The DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is clear.\r
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256\r
257**/\r
258BOOLEAN\r
259EFIAPI\r
260DebugClearMemoryEnabled (\r
261 VOID\r
262 )\r
263{\r
264 return (BOOLEAN) ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED) != 0);\r
265}\r
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266\r
267/**\r
268 Returns TRUE if any one of the bit is set both in ErrorLevel and PcdFixedDebugPrintErrorLevel.\r
269\r
270 This function compares the bit mask of ErrorLevel and PcdFixedDebugPrintErrorLevel.\r
271\r
272 @retval TRUE Current ErrorLevel is supported.\r
273 @retval FALSE Current ErrorLevel is not supported.\r
274\r
275**/\r
276BOOLEAN\r
277EFIAPI\r
278DebugPrintLevelEnabled (\r
279 IN CONST UINTN ErrorLevel\r
280 )\r
281{\r
282 return (BOOLEAN) ((ErrorLevel & PcdGet32(PcdFixedDebugPrintErrorLevel)) != 0);\r
283}\r
284\r