edkiigluedebuglib.h

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/*++

Copyright (c) 2004 - 2006, Intel Corporation                                                         
All rights reserved. This program and the accompanying materials                          
are licensed and made available under the terms and conditions of the BSD License         
which accompanies this distribution.  The full text of the license may be found at        
http://opensource.org/licenses/bsd-license.php                                            
                                                                                          
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.  


Module Name:

  EdkIIGlueDebugLib.h
  
Abstract: 

  Public include file for the Debug Library

--*/

#ifndef __EDKII_GLUE_DEBUG_LIB_H__
#define __EDKII_GLUE_DEBUG_LIB_H__

//
// To use EdkII code, these R8.x macros are undefined
//
#undef ASSERT
#undef DEBUG
#undef ASSERT_EFI_ERROR
#undef ASSERT_PROTOCOL_ALREADY_INSTALLED
#undef DEBUG_CODE
#undef CR

//
// Declare bits for PcdDebugPropertyMask
//
#define DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED       0x01
#define DEBUG_PROPERTY_DEBUG_PRINT_ENABLED        0x02
#define DEBUG_PROPERTY_DEBUG_CODE_ENABLED         0x04
#define DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED       0x08
#define DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED  0x10
#define DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED    0x20

//
// Declare bits for PcdDebugPrintErrorLevel and the ErrorLevel parameter of DebugPrint()
//
#define EFI_D_INIT      0x00000001  // Initialization style messages
#define EFI_D_WARN      0x00000002  // Warnings
#define EFI_D_LOAD      0x00000004  // Load events
#define EFI_D_FS        0x00000008  // EFI File system
#define EFI_D_POOL      0x00000010  // Alloc & Free's
#define EFI_D_PAGE      0x00000020  // Alloc & Free's
#define EFI_D_INFO      0x00000040  // Verbose
#define EFI_D_VARIABLE  0x00000100  // Variable
#define EFI_D_BM        0x00000400  // Boot Manager (BDS)
#define EFI_D_BLKIO     0x00001000  // BlkIo Driver
#define EFI_D_NET       0x00004000  // SNI Driver
#define EFI_D_UNDI      0x00010000  // UNDI Driver
#define EFI_D_LOADFILE  0x00020000  // UNDI Driver
#define EFI_D_EVENT     0x00080000  // Event messages
#define EFI_D_ERROR     0x80000000  // Error

/**

  Prints a debug message to the debug output device if the specified error level is enabled.

  If any bit in ErrorLevel is also set in PcdDebugPrintErrorLevel, then print 
  the message specified by Format and the associated variable argument list to 
  the debug output device.

  If Format is NULL, then ASSERT().

  @param  ErrorLevel  The error level of the debug message.
  @param  Format      Format string for the debug message to print.

**/
VOID
EFIAPI
DebugPrint (
  IN  UINTN        ErrorLevel,
  IN  CONST CHAR8  *Format,
  ...
  );


/**

  Prints an assert message containing a filename, line number, and description.  
  This may be followed by a breakpoint or a dead loop.

  Print a message of the form "ASSERT <FileName>(<LineNumber>): <Description>\n"
  to the debug output device.  If DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED bit of 
  PcdDebugProperyMask is set then CpuBreakpoint() is called. Otherwise, if 
  DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED bit of PcdDebugProperyMask is set then 
  CpuDeadLoop() is called.  If neither of these bits are set, then this function 
  returns immediately after the message is printed to the debug output device.
  DebugAssert() must actively prevent recusrsion.  If DebugAssert() is called while
  processing another DebugAssert(), then DebugAssert() must return immediately.

  If FileName is NULL, then a <FileName> string of ?NULL) Filename?is printed.

  If Description is NULL, then a <Description> string of ?NULL) Description?is printed.

  @param  FileName     Pointer to the name of the source file that generated the assert condition.
  @param  LineNumber   The line number in the source file that generated the assert condition
  @param  Description  Pointer to the description of the assert condition.

**/
VOID
EFIAPI
DebugAssert (
  IN CONST CHAR8  *FileName,
  IN UINTN        LineNumber,
  IN CONST CHAR8  *Description
  );


/**

  Fills a target buffer with PcdDebugClearMemoryValue, and returns the target buffer.

  This function fills Length bytes of Buffer with the value specified by 
  PcdDebugClearMemoryValue, and returns Buffer.

  If Buffer is NULL, then ASSERT().

  If Length is greater than (MAX_ADDRESS ?Buffer + 1), then ASSERT(). 

  @param   Buffer  Pointer to the target buffer to fill with PcdDebugClearMemoryValue.
  @param   Length  Number of bytes in Buffer to fill with zeros PcdDebugClearMemoryValue. 

  @return  Buffer

**/
VOID *
EFIAPI
DebugClearMemory (
  OUT VOID  *Buffer,
  IN UINTN  Length
  );


/**
  
  Returns TRUE if ASSERT() macros are enabled.

  This function returns TRUE if the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of 
  PcdDebugProperyMask is set.  Otherwise FALSE is returned.

  @retval  TRUE    The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is set.
  @retval  FALSE   The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is clear.

**/
BOOLEAN
EFIAPI
DebugAssertEnabled (
  VOID
  );


/**
  
  Returns TRUE if DEBUG()macros are enabled.

  This function returns TRUE if the DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of 
  PcdDebugProperyMask is set.  Otherwise FALSE is returned.

  @retval  TRUE    The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is set.
  @retval  FALSE   The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is clear.

**/
BOOLEAN
EFIAPI
DebugPrintEnabled (
  VOID
  );


/**
  
  Returns TRUE if DEBUG_CODE()macros are enabled.

  This function returns TRUE if the DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of 
  PcdDebugProperyMask is set.  Otherwise FALSE is returned.

  @retval  TRUE    The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is set.
  @retval  FALSE   The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is clear.

**/
BOOLEAN
EFIAPI
DebugCodeEnabled (
  VOID
  );


/**
  
  Returns TRUE if DEBUG_CLEAR_MEMORY()macro is enabled.

  This function returns TRUE if the DEBUG_PROPERTY_DEBUG_CLEAR_MEMORY_ENABLED bit of 
  PcdDebugProperyMask is set.  Otherwise FALSE is returned.

  @retval  TRUE    The DEBUG_PROPERTY_DEBUG_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is set.
  @retval  FALSE   The DEBUG_PROPERTY_DEBUG_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is clear.

**/
BOOLEAN
EFIAPI
DebugClearMemoryEnabled (
  VOID
  );


/**
  
  Internal worker macro that calls DebugAssert().

  This macro calls DebugAssert() passing in the filename, line number, and 
  expression that evailated to FALSE.

  @param  Expression  Boolean expression that evailated to FALSE

**/
#define _ASSERT(Expression)  DebugAssert (__FILE__, __LINE__, #Expression)


/**
  
  Internal worker macro that calls DebugPrint().

  This macro calls DebugPrint() passing in the debug error level, a format 
  string, and a variable argument list.

  @param  Expression  Expression containing an error level, a format string, 
                      and a variable argument list based on the format string.

**/
#define _DEBUG(Expression)   DebugPrint Expression


/**
  
  Macro that calls DebugAssert() if a expression evaluates to FALSE.

  If the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is set, 
  then this macro evaluates the Boolean expression specified by Expression.  If 
  Expression evaluates to FALSE, then DebugAssert() is called passing in the 
  source filename, source line number, and Expression.

  @param  Expression  Boolean expression

**/
#ifdef EDKII_GLUE_LIBRARY_IMPLEMENTATION
  // Glue Library internal
  
  #if EDKII_GLUE_LIBRARY_DEBUG_ENABLE
    #define ASSERT(Expression)        \
      do {                            \
        if (DebugAssertEnabled ()) {  \
          if (!(Expression)) {        \
            _ASSERT (Expression);     \
          }                           \
        }                             \