MdePkg/Library/BasePostCodeLibDebug/PostCode.c

   1 /** @file
   2   The instance of Post Code Library that layers on top of a Debug Library instance.
   3
   4   Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
   5   SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7 **/
   8
   9 #include <Base.h>
  10
  11 #include <Library/PostCodeLib.h>
  12 #include <Library/DebugLib.h>
  13 #include <Library/PcdLib.h>
  14
  15 /**
  16   Sends an 32-bit value to a POST card.
  17
  18   Sends the 32-bit value specified by Value to a POST card, and returns Value.
  19   Some implementations of this library function may perform I/O operations
  20   directly to a POST card device.  Other implementations may send Value to
  21   ReportStatusCode(), and the status code reporting mechanism will eventually
  22   display the 32-bit value on the status reporting device.
  23
  24   PostCode() must actively prevent recursion.  If PostCode() is called while
  25   processing another any other Post Code Library function, then
  26   PostCode() must return Value immediately.
  27
  28   @param  Value  The 32-bit value to write to the POST card.
  29
  30   @return The 32-bit value to write to the POST card.
  31
  32 **/
  33 UINT32
  34 EFIAPI
  35 PostCode (
  36   IN UINT32  Value
  37   )
  38 {
  39   DEBUG((DEBUG_INFO, "POST %08x\n", Value));
  40   return Value;
  41 }
  42
  43
  44 /**
  45   Sends an 32-bit value to a POST and associated ASCII string.
  46
  47   Sends the 32-bit value specified by Value to a POST card, and returns Value.
  48   If Description is not NULL, then the ASCII string specified by Description is
  49   also passed to the handler that displays the POST card value.  Some
  50   implementations of this library function may perform I/O operations directly
  51   to a POST card device.  Other implementations may send Value to ReportStatusCode(),
  52   and the status code reporting mechanism will eventually display the 32-bit
  53   value on the status reporting device.
  54
  55   PostCodeWithDescription()must actively prevent recursion.  If
  56   PostCodeWithDescription() is called while processing another any other Post
  57   Code Library function, then PostCodeWithDescription() must return Value
  58   immediately.
  59
  60   @param  Value        The 32-bit value to write to the POST card.
  61   @param  Description  The pointer to an ASCII string that is a description of the
  62                        POST code value.  This is an optional parameter that may
  63                        be NULL.
  64
  65   @return The 32-bit value to write to the POST card.
  66
  67 **/
  68 UINT32
  69 EFIAPI
  70 PostCodeWithDescription (
  71   IN UINT32       Value,
  72   IN CONST CHAR8  *Description  OPTIONAL
  73   )
  74 {
  75   DEBUG((DEBUG_INFO, "POST %08x - %s\n", Value, Description));
  76   return Value;
  77 }
  78
  79
  80 /**
  81   Returns TRUE if POST Codes are enabled.
  82
  83   This function returns TRUE if the POST_CODE_PROPERTY_POST_CODE_ENABLED
  84   bit of PcdPostCodePropertyMask is set.  Otherwise FALSE is returned.
  85
  86   @retval  TRUE   The POST_CODE_PROPERTY_POST_CODE_ENABLED bit of
  87                   PcdPostCodeProperyMask is set.
  88   @retval  FALSE  The POST_CODE_PROPERTY_POST_CODE_ENABLED bit of
  89                   PcdPostCodeProperyMask is clear.
  90
  91 **/
  92 BOOLEAN
  93 EFIAPI
  94 PostCodeEnabled (
  95   VOID
  96   )
  97 {
  98   return (BOOLEAN) ((PcdGet8(PcdPostCodePropertyMask) & POST_CODE_PROPERTY_POST_CODE_ENABLED) != 0);
  99 }
 100
 101
 102 /**
 103   Returns TRUE if POST code descriptions are enabled.
 104
 105   This function returns TRUE if the POST_CODE_PROPERTY_POST_CODE_DESCRIPTION_ENABLED
 106   bit of PcdPostCodePropertyMask is set.  Otherwise FALSE is returned.
 107
 108   @retval  TRUE   The POST_CODE_PROPERTY_POST_CODE_DESCRIPTION_ENABLED bit of
 109                   PcdPostCodeProperyMask is set.
 110   @retval  FALSE  The POST_CODE_PROPERTY_POST_CODE_DESCRIPTION_ENABLED bit of
 111                   PcdPostCodeProperyMask is clear.
 112
 113 **/
 114 BOOLEAN
 115 EFIAPI
 116 PostCodeDescriptionEnabled (
 117   VOID
 118   )
 119 {
 120   return (BOOLEAN) ((PcdGet8(PcdPostCodePropertyMask) & POST_CODE_PROPERTY_POST_CODE_DESCRIPTION_ENABLED) != 0);
 121 }