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[mirror_edk2.git] / MdePkg / Library / BaseDebugLibSerialPort / DebugLib.c

/** @file\r
  Base Debug library instance base on Serial Port library.\r
  It uses PrintLib to send debug messages to serial port device.\r
\r
  NOTE: If the Serial Port library enables hardware flow control, then a call\r
  to DebugPrint() or DebugAssert() may hang if writes to the serial port are\r
  being blocked.  This may occur if a key(s) are pressed in a terminal emulator\r
  used to monitor the DEBUG() and ASSERT() messages.\r
\r
  Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include <Base.h>\r
#include <Library/DebugLib.h>\r
#include <Library/BaseLib.h>\r
#include <Library/PrintLib.h>\r
#include <Library/PcdLib.h>\r
#include <Library/BaseMemoryLib.h>\r
#include <Library/SerialPortLib.h>\r
#include <Library/DebugPrintErrorLevelLib.h>\r
\r
//\r
// Define the maximum debug and assert message length that this library supports\r
//\r
#define MAX_DEBUG_MESSAGE_LENGTH  0x100\r
\r
//\r
// VA_LIST can not initialize to NULL for all compiler, so we use this to\r
// indicate a null VA_LIST\r
//\r
VA_LIST  mVaListNull;\r
\r
/**\r
  The constructor function initialize the Serial Port Library\r
\r
  @retval EFI_SUCCESS   The constructor always returns RETURN_SUCCESS.\r
\r
**/\r
RETURN_STATUS\r
EFIAPI\r
BaseDebugLibSerialPortConstructor (\r
  VOID\r
  )\r
{\r
  return SerialPortInitialize ();\r
}\r
\r
/**\r
  Prints a debug message to the debug output device if the specified error level is enabled.\r
\r
  If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function\r
  GetDebugPrintErrorLevel (), then print the message specified by Format and the\r
  associated variable argument list to the debug output device.\r
\r
  If Format is NULL, then ASSERT().\r
\r
  @param  ErrorLevel  The error level of the debug message.\r
  @param  Format      Format string for the debug message to print.\r
  @param  ...         Variable argument list whose contents are accessed\r
                      based on the format string specified by Format.\r
\r
**/\r
VOID\r
EFIAPI\r
DebugPrint (\r
  IN  UINTN        ErrorLevel,\r
  IN  CONST CHAR8  *Format,\r
  ...\r
  )\r
{\r
  VA_LIST  Marker;\r
\r
  VA_START (Marker, Format);\r
  DebugVPrint (ErrorLevel, Format, Marker);\r
  VA_END (Marker);\r
}\r
\r
/**\r
  Prints a debug message to the debug output device if the specified\r
  error level is enabled base on Null-terminated format string and a\r
  VA_LIST argument list or a BASE_LIST argument list.\r
\r
  If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function\r
  GetDebugPrintErrorLevel (), then print the message specified by Format and\r
  the associated variable argument list to the debug output device.\r
\r
  If Format is NULL, then ASSERT().\r
\r
  @param  ErrorLevel      The error level of the debug message.\r
  @param  Format          Format string for the debug message to print.\r
  @param  VaListMarker    VA_LIST marker for the variable argument list.\r
  @param  BaseListMarker  BASE_LIST marker for the variable argument list.\r
\r
**/\r
VOID\r
DebugPrintMarker (\r
  IN  UINTN        ErrorLevel,\r
  IN  CONST CHAR8  *Format,\r
  IN  VA_LIST      VaListMarker,\r
  IN  BASE_LIST    BaseListMarker\r
  )\r
{\r
  CHAR8  Buffer[MAX_DEBUG_MESSAGE_LENGTH];\r
\r
  //\r
  // If Format is NULL, then ASSERT().\r
  //\r
  ASSERT (Format != NULL);\r
\r
  //\r
  // Check driver debug mask value and global mask\r
  //\r
  if ((ErrorLevel & GetDebugPrintErrorLevel ()) == 0) {\r
    return;\r
  }\r
\r
  //\r
  // Convert the DEBUG() message to an ASCII String\r
  //\r
  if (BaseListMarker == NULL) {\r
    AsciiVSPrint (Buffer, sizeof (Buffer), Format, VaListMarker);\r
  } else {\r
    AsciiBSPrint (Buffer, sizeof (Buffer), Format, BaseListMarker);\r
  }\r
\r
  //\r
  // Send the print string to a Serial Port\r
  //\r
  SerialPortWrite ((UINT8 *)Buffer, AsciiStrLen (Buffer));\r
}\r
\r
/**\r
  Prints a debug message to the debug output device if the specified\r
  error level is enabled.\r
\r
  If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function\r
  GetDebugPrintErrorLevel (), then print the message specified by Format and\r
  the associated variable argument list to the debug output device.\r
\r
  If Format is NULL, then ASSERT().\r
\r
  @param  ErrorLevel    The error level of the debug message.\r
  @param  Format        Format string for the debug message to print.\r
  @param  VaListMarker  VA_LIST marker for the variable argument list.\r
\r
**/\r
VOID\r
EFIAPI\r
DebugVPrint (\r
  IN  UINTN        ErrorLevel,\r
  IN  CONST CHAR8  *Format,\r
  IN  VA_LIST      VaListMarker\r
  )\r
{\r
  DebugPrintMarker (ErrorLevel, Format, VaListMarker, NULL);\r
}\r
\r
/**\r
  Prints a debug message to the debug output device if the specified\r
  error level is enabled.\r
  This function use BASE_LIST which would provide a more compatible\r
  service than VA_LIST.\r
\r
  If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function\r
  GetDebugPrintErrorLevel (), then print the message specified by Format and\r
  the associated variable argument list to the debug output device.\r
\r
  If Format is NULL, then ASSERT().\r
\r
  @param  ErrorLevel      The error level of the debug message.\r
  @param  Format          Format string for the debug message to print.\r
  @param  BaseListMarker  BASE_LIST marker for the variable argument list.\r
\r
**/\r
VOID\r
EFIAPI\r
DebugBPrint (\r
  IN  UINTN        ErrorLevel,\r
  IN  CONST CHAR8  *Format,\r
  IN  BASE_LIST    BaseListMarker\r
  )\r
{\r
  DebugPrintMarker (ErrorLevel, Format, mVaListNull, BaseListMarker);\r
}\r
\r
/**\r
  Prints an assert message containing a filename, line number, and description.\r
  This may be followed by a breakpoint or a dead loop.\r
\r
  Print a message of the form "ASSERT <FileName>(<LineNumber>): <Description>\n"\r
  to the debug output device.  If DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED bit of\r
  PcdDebugProperyMask is set then CpuBreakpoint() is called. Otherwise, if\r
  DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED bit of PcdDebugProperyMask is set then\r
  CpuDeadLoop() is called.  If neither of these bits are set, then this function\r
  returns immediately after the message is printed to the debug output device.\r
  DebugAssert() must actively prevent recursion.  If DebugAssert() is called while\r
  processing another DebugAssert(), then DebugAssert() must return immediately.\r
\r
  If FileName is NULL, then a <FileName> string of "(NULL) Filename" is printed.\r
  If Description is NULL, then a <Description> string of "(NULL) Description" is printed.\r
\r
  @param  FileName     The pointer to the name of the source file that generated the assert condition.\r
  @param  LineNumber   The line number in the source file that generated the assert condition\r
  @param  Description  The pointer to the description of the assert condition.\r
\r
**/\r
VOID\r
EFIAPI\r
DebugAssert (\r
  IN CONST CHAR8  *FileName,\r
  IN UINTN        LineNumber,\r
  IN CONST CHAR8  *Description\r
  )\r
{\r
  CHAR8  Buffer[MAX_DEBUG_MESSAGE_LENGTH];\r
\r
  //\r
  // Generate the ASSERT() message in Ascii format\r
  //\r
  AsciiSPrint (Buffer, sizeof (Buffer), "ASSERT [%a] %a(%d): %a\n", gEfiCallerBaseName, FileName, LineNumber, Description);\r
\r
  //\r
  // Send the print string to the Console Output device\r
  //\r
  SerialPortWrite ((UINT8 *)Buffer, AsciiStrLen (Buffer));\r
\r
  //\r
  // Generate a Breakpoint, DeadLoop, or NOP based on PCD settings\r
  //\r
  if ((PcdGet8 (PcdDebugPropertyMask) & DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED) != 0) {\r
    CpuBreakpoint ();\r
  } else if ((PcdGet8 (PcdDebugPropertyMask) & DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED) != 0) {\r
    CpuDeadLoop ();\r
  }\r
}\r
\r
/**\r
  Fills a target buffer with PcdDebugClearMemoryValue, and returns the target buffer.\r
\r
  This function fills Length bytes of Buffer with the value specified by\r
  PcdDebugClearMemoryValue, and returns Buffer.\r
\r
  If Buffer is NULL, then ASSERT().\r
  If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r
\r
  @param   Buffer  The pointer to the target buffer to be filled with PcdDebugClearMemoryValue.\r
  @param   Length  The number of bytes in Buffer to fill with zeros PcdDebugClearMemoryValue.\r
\r
  @return  Buffer  The pointer to the target buffer filled with PcdDebugClearMemoryValue.\r
\r
**/\r
VOID *\r
EFIAPI\r
DebugClearMemory (\r
  OUT VOID  *Buffer,\r
  IN UINTN  Length\r
  )\r
{\r
  //\r
  // If Buffer is NULL, then ASSERT().\r
  //\r
  ASSERT (Buffer != NULL);\r
\r
  //\r
  // SetMem() checks for the the ASSERT() condition on Length and returns Buffer\r
  //\r
  return SetMem (Buffer, Length, PcdGet8 (PcdDebugClearMemoryValue));\r
}\r
\r
/**\r
  Returns TRUE if ASSERT() macros are enabled.\r
\r
  This function returns TRUE if the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of\r
  PcdDebugProperyMask is set.  Otherwise FALSE is returned.\r
\r
  @retval  TRUE    The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is set.\r
  @retval  FALSE   The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is clear.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
DebugAssertEnabled (\r
  VOID\r
  )\r
{\r
  return (BOOLEAN)((PcdGet8 (PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED) != 0);\r
}\r
\r
/**\r
  Returns TRUE if DEBUG() macros are enabled.\r
\r
  This function returns TRUE if the DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of\r
  PcdDebugProperyMask is set.  Otherwise FALSE is returned.\r
\r
  @retval  TRUE    The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is set.\r
  @retval  FALSE   The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is clear.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
DebugPrintEnabled (\r
  VOID\r
  )\r
{\r
  return (BOOLEAN)((PcdGet8 (PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_PRINT_ENABLED) != 0);\r
}\r
\r
/**\r
  Returns TRUE if DEBUG_CODE() macros are enabled.\r
\r
  This function returns TRUE if the DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of\r
  PcdDebugProperyMask is set.  Otherwise FALSE is returned.\r
\r
  @retval  TRUE    The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is set.\r
  @retval  FALSE   The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is clear.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
DebugCodeEnabled (\r
  VOID\r
  )\r
{\r
  return (BOOLEAN)((PcdGet8 (PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_CODE_ENABLED) != 0);\r
}\r
\r
/**\r
  Returns TRUE if DEBUG_CLEAR_MEMORY() macro is enabled.\r
\r
  This function returns TRUE if the DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of\r
  PcdDebugProperyMask is set.  Otherwise FALSE is returned.\r
\r
  @retval  TRUE    The DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is set.\r
  @retval  FALSE   The DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is clear.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
DebugClearMemoryEnabled (\r
  VOID\r
  )\r
{\r
  return (BOOLEAN)((PcdGet8 (PcdDebugPropertyMask) & DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED) != 0);\r
}\r
\r
/**\r
  Returns TRUE if any one of the bit is set both in ErrorLevel and PcdFixedDebugPrintErrorLevel.\r
\r
  This function compares the bit mask of ErrorLevel and PcdFixedDebugPrintErrorLevel.\r
\r
  @retval  TRUE    Current ErrorLevel is supported.\r
  @retval  FALSE   Current ErrorLevel is not supported.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
DebugPrintLevelEnabled (\r
  IN  CONST UINTN  ErrorLevel\r
  )\r
{\r
  return (BOOLEAN)((ErrorLevel & PcdGet32 (PcdFixedDebugPrintErrorLevel)) != 0);\r
}\r