2 UEFI Debug Lib that sends messages to the Standard Error Device in the EFI System Table.
4 Copyright (c) 2006 - 2008, Intel Corporation<BR>
5 All rights reserved. This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
19 #include <Library/DebugLib.h>
20 #include <Library/UefiBootServicesTableLib.h>
21 #include <Library/PrintLib.h>
22 #include <Library/PcdLib.h>
23 #include <Library/BaseLib.h>
24 #include <Library/BaseMemoryLib.h>
27 // Define the maximum debug and assert message length that this library supports
29 #define MAX_DEBUG_MESSAGE_LENGTH 0x100
34 Prints a debug message to the debug output device if the specified error level is enabled.
36 If any bit in ErrorLevel is also set in PcdDebugPrintErrorLevel, then print
37 the message specified by Format and the associated variable argument list to
38 the debug output device.
40 If Format is NULL, then ASSERT().
42 @param ErrorLevel The error level of the debug message.
43 @param Format Format string for the debug message to print.
44 @param ... The variable argument list.
51 IN CONST CHAR8
*Format
,
55 CHAR16 Buffer
[MAX_DEBUG_MESSAGE_LENGTH
];
56 CHAR8 AsciiBuffer
[MAX_DEBUG_MESSAGE_LENGTH
];
60 // If Format is NULL, then ASSERT().
62 ASSERT (Format
!= NULL
);
65 // Check driver debug mask value and global mask
67 if ((ErrorLevel
& PcdGet32(PcdDebugPrintErrorLevel
)) == 0) {
72 // Convert the DEBUG() message to a Unicode String
74 VA_START (Marker
, Format
);
75 AsciiVSPrint (AsciiBuffer
, sizeof (AsciiBuffer
), Format
, Marker
);
76 AsciiStrToUnicodeStr (AsciiBuffer
, Buffer
);
80 // Send the print string to the Standard Error device
82 if ((gST
!= NULL
) && (gST
->StdErr
!= NULL
)) {
83 gST
->StdErr
->OutputString (gST
->StdErr
, Buffer
);
90 Prints an assert message containing a filename, line number, and description.
91 This may be followed by a breakpoint or a dead loop.
93 Print a message of the form "ASSERT <FileName>(<LineNumber>): <Description>\n"
94 to the debug output device. If DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED bit of
95 PcdDebugProperyMask is set then CpuBreakpoint() is called. Otherwise, if
96 DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED bit of PcdDebugProperyMask is set then
97 CpuDeadLoop() is called. If neither of these bits are set, then this function
98 returns immediately after the message is printed to the debug output device.
99 DebugAssert() must actively prevent recusrsion. If DebugAssert() is called while
100 processing another DebugAssert(), then DebugAssert() must return immediately.
102 If FileName is NULL, then a <FileName> string of "(NULL) Filename" is printed.
104 If Description is NULL, then a <Description> string of "(NULL) Description" is printed.
106 @param FileName Pointer to the name of the source file that generated the assert condition.
107 @param LineNumber The line number in the source file that generated the assert condition
108 @param Description Pointer to the description of the assert condition.
114 IN CONST CHAR8
*FileName
,
116 IN CONST CHAR8
*Description
119 CHAR16 Buffer
[MAX_DEBUG_MESSAGE_LENGTH
];
120 CHAR8 AsciiBuffer
[MAX_DEBUG_MESSAGE_LENGTH
];
123 // Generate the ASSERT() message in Unicode format
125 AsciiSPrint (AsciiBuffer
, sizeof (AsciiBuffer
), "ASSERT %a(%d): %a\n", FileName
, LineNumber
, Description
);
126 AsciiStrToUnicodeStr (AsciiBuffer
, Buffer
);
129 // Send the print string to the Standard Error device
131 if ((gST
!= NULL
) && (gST
->StdErr
!= NULL
)) {
132 gST
->StdErr
->OutputString (gST
->StdErr
, Buffer
);
136 // Generate a Breakpoint, DeadLoop, or NOP based on PCD settings
138 if ((PcdGet8(PcdDebugPropertyMask
) & DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED
) != 0) {
140 } else if ((PcdGet8(PcdDebugPropertyMask
) & DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED
) != 0) {
148 Fills a target buffer with PcdDebugClearMemoryValue, and returns the target buffer.
150 This function fills Length bytes of Buffer with the value specified by
151 PcdDebugClearMemoryValue, and returns Buffer.
153 If Buffer is NULL, then ASSERT().
155 If Length is greater than (MAX_ADDRESS ? Buffer + 1), then ASSERT().
157 @param Buffer Pointer to the target buffer to fill with PcdDebugClearMemoryValue.
158 @param Length Number of bytes in Buffer to fill with zeros PcdDebugClearMemoryValue.
160 @return Buffer Pointer to the target buffer filled with PcdDebugClearMemoryValue.
171 // If Buffer is NULL, then ASSERT().
173 ASSERT (Buffer
!= NULL
);
176 // SetMem() checks for the the ASSERT() condition on Length and returns Buffer
178 return SetMem (Buffer
, Length
, PcdGet8(PcdDebugClearMemoryValue
));
184 Returns TRUE if ASSERT() macros are enabled.
186 This function returns TRUE if the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of
187 PcdDebugProperyMask is set. Otherwise FALSE is returned.
189 @retval TRUE The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is set.
190 @retval FALSE The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is clear.
199 return (BOOLEAN
) ((PcdGet8(PcdDebugPropertyMask
) & DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED
) != 0);
205 Returns TRUE if DEBUG()macros are enabled.
207 This function returns TRUE if the DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of
208 PcdDebugProperyMask is set. Otherwise FALSE is returned.
210 @retval TRUE The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is set.
211 @retval FALSE The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is clear.
220 return (BOOLEAN
) ((PcdGet8(PcdDebugPropertyMask
) & DEBUG_PROPERTY_DEBUG_PRINT_ENABLED
) != 0);
226 Returns TRUE if DEBUG_CODE()macros are enabled.
228 This function returns TRUE if the DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of
229 PcdDebugProperyMask is set. Otherwise FALSE is returned.
231 @retval TRUE The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is set.
232 @retval FALSE The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is clear.
241 return (BOOLEAN
) ((PcdGet8(PcdDebugPropertyMask
) & DEBUG_PROPERTY_DEBUG_CODE_ENABLED
) != 0);
247 Returns TRUE if DEBUG_CLEAR_MEMORY()macro is enabled.
249 This function returns TRUE if the DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of
250 PcdDebugProperyMask is set. Otherwise FALSE is returned.
252 @retval TRUE The DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is set.
253 @retval FALSE The DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is clear.
258 DebugClearMemoryEnabled (
262 return (BOOLEAN
) ((PcdGet8(PcdDebugPropertyMask
) & DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED
) != 0);