MdePkg/Library/BasePostCodeLibPort80/PostCode.c

   1 /** @file
   2   Report Status Code Library Post Code functions for DXE Phase.
   3
   4   Copyright (c) 2006, 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
   9
  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.
  12
  13 **/
  14
  15
  16 //
  17 // The package level header files this module uses
  18 //
  19 #include <Base.h>
  20 //
  21 // The protocols, PPI and GUID defintions for this module
  22 //
  23 //
  24 // The Library classes this module consumes
  25 //
  26 #include <Library/PostCodeLib.h>
  27 #include <Library/PcdLib.h>
  28 #include <Library/IoLib.h>
  29
  30 /**
  31   Sends an 32-bit value to a POST card.
  32
  33   Sends the 32-bit value specified by Value to a POST card, and returns Value.
  34   Some implementations of this library function may perform I/O operations
  35   directly to a POST card device.  Other implementations may send Value to
  36   ReportStatusCode(), and the status code reporting mechanism will eventually
  37   display the 32-bit value on the status reporting device.
  38
  39   PostCode() must actively prevent recursion.  If PostCode() is called while
  40   processing another any other Report Status Code Library function, then
  41   PostCode() must return Value immediately.
  42
  43   @param  Value  The 32-bit value to write to the POST card.
  44
  45   @return  Value
  46
  47 **/
  48 UINT32
  49 EFIAPI
  50 PostCode (
  51   IN UINT32  Value
  52   )
  53 {
  54   IoWrite8 (0x80, (UINT8)(Value));
  55   return Value;
  56 }
  57
  58
  59 /**
  60   Sends an 32-bit value to a POST and associated ASCII string.
  61
  62   Sends the 32-bit value specified by Value to a POST card, and returns Value.
  63   If Description is not NULL, then the ASCII string specified by Description is
  64   also passed to the handler that displays the POST card value.  Some
  65   implementations of this library function may perform I/O operations directly
  66   to a POST card device.  Other implementations may send Value to ReportStatusCode(),
  67   and the status code reporting mechanism will eventually display the 32-bit
  68   value on the status reporting device.
  69
  70   PostCodeWithDescription()must actively prevent recursion.  If
  71   PostCodeWithDescription() is called while processing another any other Report
  72   Status Code Library function, then PostCodeWithDescription() must return Value
  73   immediately.
  74
  75   @param  Value        The 32-bit value to write to the POST card.
  76   @param  Description  Pointer to an ASCII string that is a description of the
  77                        POST code value.  This is an optional parameter that may
  78                        be NULL.
  79
  80   @return  Value
  81
  82 **/
  83 UINT32
  84 EFIAPI
  85 PostCodeWithDescription (
  86   IN UINT32       Value,
  87   IN CONST CHAR8  *Description  OPTIONAL
  88   )
  89 {
  90   IoWrite8 (0x80, (UINT8)(Value));
  91   return Value;
  92 }
  93
  94
  95 /**
  96   Returns TRUE if POST Codes are enabled.
  97
  98   This function returns TRUE if the POST_CODE_PROPERTY_POST_CODE_ENABLED
  99   bit of PcdPostCodePropertyMask is set.  Otherwise FALSE is returned.
 100
 101   @retval  TRUE   The POST_CODE_PROPERTY_POST_CODE_ENABLED bit of
 102                   PcdPostCodeProperyMask is set.
 103   @retval  FALSE  The POST_CODE_PROPERTY_POST_CODE_ENABLED bit of
 104                   PcdPostCodeProperyMask is clear.
 105
 106 **/
 107 BOOLEAN
 108 EFIAPI
 109 PostCodeEnabled (
 110   VOID
 111   )
 112 {
 113   return (BOOLEAN) ((PcdGet8(PcdPostCodePropertyMask) & POST_CODE_PROPERTY_POST_CODE_ENABLED) != 0);
 114 }
 115
 116
 117 /**
 118   Returns TRUE if POST code descriptions are enabled.
 119
 120   This function returns TRUE if the
 121   POST_CODE_PROPERTY_POST_CODE_ENABLED bit of
 122   PcdPostCodePropertyMask is set.  Otherwise FALSE is returned.
 123
 124   @retval  TRUE   The POST_CODE_PROPERTY_POST_CODE_ENABLED
 125                   bit of PcdPostCodeProperyMask is set.
 126   @retval  FALSE  The POST_CODE_PROPERTY_POST_CODE_ENABLED
 127                   bit of PcdPostCodeProperyMask is clear.
 128
 129 **/
 130 BOOLEAN
 131 EFIAPI
 132 PostCodeDescriptionEnabled (
 133   VOID
 134   )
 135 {
 136   return (BOOLEAN) ((PcdGet8(PcdPostCodePropertyMask) & POST_CODE_PROPERTY_POST_CODE_ENABLED) != 0);
 137 }