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140 lines
4.0 KiB
C
140 lines
4.0 KiB
C
/** @file
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Post Code Library instance that writes post code values to I/O port 0x80.
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Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Base.h>
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#include <Library/PostCodeLib.h>
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#include <Library/PcdLib.h>
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#include <Library/IoLib.h>
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#include <Library/DebugLib.h>
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/**
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Sends an 32-bit value to a POST card.
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Sends the 32-bit value specified by Value to a POST card, and returns Value.
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Some implementations of this library function may perform I/O operations
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directly to a POST card device. Other implementations may send Value to
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ReportStatusCode(), and the status code reporting mechanism will eventually
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display the 32-bit value on the status reporting device.
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PostCode() must actively prevent recursion. If PostCode() is called while
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processing another any other Post Code Library function, then
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PostCode() must return Value immediately.
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@param Value The 32-bit value to write to the POST card.
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@return The 32-bit value to write to the POST card.
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**/
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UINT32
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EFIAPI
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PostCode (
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IN UINT32 Value
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)
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{
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switch (PcdGet8 (PcdPort80DataWidth)) {
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case 8:
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IoWrite8 (0x80, (UINT8)(Value));
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break;
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case 16:
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IoWrite16 (0x80, (UINT16)(Value));
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break;
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case 32:
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IoWrite32 (0x80, Value);
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break;
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default:
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//
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// Assert on the invalid data width
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//
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ASSERT (FALSE);
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break;
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}
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return Value;
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}
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/**
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Sends an 32-bit value to a POST and associated ASCII string.
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Sends the 32-bit value specified by Value to a POST card, and returns Value.
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If Description is not NULL, then the ASCII string specified by Description is
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also passed to the handler that displays the POST card value. Some
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implementations of this library function may perform I/O operations directly
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to a POST card device. Other implementations may send Value to ReportStatusCode(),
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and the status code reporting mechanism will eventually display the 32-bit
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value on the status reporting device.
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PostCodeWithDescription()must actively prevent recursion. If
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PostCodeWithDescription() is called while processing another any other Post
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Code Library function, then PostCodeWithDescription() must return Value
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immediately.
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@param Value The 32-bit value to write to the POST card.
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@param Description The pointer to an ASCII string that is a description of the
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POST code value. This is an optional parameter that may
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be NULL.
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@return The 32-bit value to write to the POST card.
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**/
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UINT32
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EFIAPI
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PostCodeWithDescription (
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IN UINT32 Value,
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IN CONST CHAR8 *Description OPTIONAL
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)
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{
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PostCode (Value);
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return Value;
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}
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/**
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Returns TRUE if POST Codes are enabled.
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This function returns TRUE if the POST_CODE_PROPERTY_POST_CODE_ENABLED
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bit of PcdPostCodePropertyMask is set. Otherwise FALSE is returned.
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@retval TRUE The POST_CODE_PROPERTY_POST_CODE_ENABLED bit of
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PcdPostCodeProperyMask is set.
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@retval FALSE The POST_CODE_PROPERTY_POST_CODE_ENABLED bit of
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PcdPostCodeProperyMask is clear.
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**/
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BOOLEAN
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EFIAPI
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PostCodeEnabled (
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VOID
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)
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{
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return (BOOLEAN) ((PcdGet8(PcdPostCodePropertyMask) & POST_CODE_PROPERTY_POST_CODE_ENABLED) != 0);
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}
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/**
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Returns TRUE if POST code descriptions are enabled.
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This function returns TRUE if the POST_CODE_PROPERTY_POST_CODE_DESCRIPTION_ENABLED
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bit of PcdPostCodePropertyMask is set. Otherwise FALSE is returned.
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@retval TRUE The POST_CODE_PROPERTY_POST_CODE_DESCRIPTION_ENABLED bit of
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PcdPostCodeProperyMask is set.
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@retval FALSE The POST_CODE_PROPERTY_POST_CODE_DESCRIPTION_ENABLED bit of
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PcdPostCodeProperyMask is clear.
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**/
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BOOLEAN
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EFIAPI
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PostCodeDescriptionEnabled (
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VOID
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)
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{
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return (BOOLEAN) ((PcdGet8(PcdPostCodePropertyMask) & POST_CODE_PROPERTY_POST_CODE_DESCRIPTION_ENABLED) != 0);
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}
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