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437 lines
13 KiB
C
437 lines
13 KiB
C
/** @file
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DXE runtime Debug library instance based on Serial Port library.
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It takes care not to call into SerialPortLib after ExitBootServices() has
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been called, to prevent touching hardware that is no longer owned by the
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firmware.
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Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
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Copyright (c) 2018, Linaro, Ltd. 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/DebugLib.h>
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#include <Library/DebugPrintErrorLevelLib.h>
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#include <Library/BaseLib.h>
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#include <Library/PrintLib.h>
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#include <Library/PcdLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/SerialPortLib.h>
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STATIC EFI_EVENT mEfiExitBootServicesEvent;
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STATIC BOOLEAN mEfiAtRuntime = FALSE;
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//
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// Define the maximum debug and assert message length that this library supports
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//
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#define MAX_DEBUG_MESSAGE_LENGTH 0x100
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//
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// VA_LIST can not initialize to NULL for all compiler, so we use this to
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// indicate a null VA_LIST
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//
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VA_LIST mVaListNull;
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/**
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Set AtRuntime flag as TRUE after ExitBootServices.
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@param[in] Event The Event that is being processed.
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@param[in] Context The Event Context.
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**/
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STATIC
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VOID
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EFIAPI
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ExitBootServicesEvent (
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IN EFI_EVENT Event,
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IN VOID *Context
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)
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{
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mEfiAtRuntime = TRUE;
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}
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/**
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The constructor function to initialize the Serial Port library and
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register a callback for the ExitBootServices event.
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@param[in] ImageHandle The firmware allocated handle for the EFI image.
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@param[in] SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The operation completed successfully.
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@retval other Either the serial port failed to initialize or the
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ExitBootServices event callback registration failed.
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**/
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EFI_STATUS
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EFIAPI
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DxeRuntimeDebugLibSerialPortConstructor (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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Status = SerialPortInitialize ();
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if (EFI_ERROR (Status)) {
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return Status;
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}
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return SystemTable->BootServices->CreateEventEx (EVT_NOTIFY_SIGNAL,
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TPL_NOTIFY, ExitBootServicesEvent, NULL,
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&gEfiEventExitBootServicesGuid,
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&mEfiExitBootServicesEvent);
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}
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/**
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If a runtime driver exits with an error, it must call this routine
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to free the allocated resource before the exiting.
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@param[in] ImageHandle The firmware allocated handle for the EFI image.
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@param[in] SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The Runtime Driver Lib shutdown successfully.
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@retval EFI_UNSUPPORTED Runtime Driver lib was not initialized.
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**/
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EFI_STATUS
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EFIAPI
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DxeRuntimeDebugLibSerialPortDestructor (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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return SystemTable->BootServices->CloseEvent (mEfiExitBootServicesEvent);
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}
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/**
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Prints a debug message to the debug output device if the specified error level is enabled.
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If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function
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GetDebugPrintErrorLevel (), then print the message specified by Format and the
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associated variable argument list to the debug output device.
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If Format is NULL, then ASSERT().
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@param ErrorLevel The error level of the debug message.
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@param Format Format string for the debug message to print.
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@param ... Variable argument list whose contents are accessed
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based on the format string specified by Format.
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**/
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VOID
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EFIAPI
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DebugPrint (
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IN UINTN ErrorLevel,
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IN CONST CHAR8 *Format,
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...
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)
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{
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VA_LIST Marker;
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VA_START (Marker, Format);
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DebugVPrint (ErrorLevel, Format, Marker);
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VA_END (Marker);
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}
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/**
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Prints a debug message to the debug output device if the specified
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error level is enabled base on Null-terminated format string and a
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VA_LIST argument list or a BASE_LIST argument list.
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If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function
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GetDebugPrintErrorLevel (), then print the message specified by Format and
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the associated variable argument list to the debug output device.
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If Format is NULL, then ASSERT().
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@param ErrorLevel The error level of the debug message.
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@param Format Format string for the debug message to print.
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@param VaListMarker VA_LIST marker for the variable argument list.
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@param BaseListMarker BASE_LIST marker for the variable argument list.
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**/
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VOID
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DebugPrintMarker (
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IN UINTN ErrorLevel,
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IN CONST CHAR8 *Format,
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IN VA_LIST VaListMarker,
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IN BASE_LIST BaseListMarker
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)
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{
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CHAR8 Buffer[MAX_DEBUG_MESSAGE_LENGTH];
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if (mEfiAtRuntime) {
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return;
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}
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//
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// If Format is NULL, then ASSERT().
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//
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ASSERT (Format != NULL);
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//
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// Check driver debug mask value and global mask
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//
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if ((ErrorLevel & GetDebugPrintErrorLevel ()) == 0) {
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return;
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}
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//
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// Convert the DEBUG() message to an ASCII String
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//
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if (BaseListMarker == NULL) {
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AsciiVSPrint (Buffer, sizeof (Buffer), Format, VaListMarker);
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} else {
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AsciiBSPrint (Buffer, sizeof (Buffer), Format, BaseListMarker);
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}
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//
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// Send the print string to a Serial Port
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//
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SerialPortWrite ((UINT8 *)Buffer, AsciiStrLen (Buffer));
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}
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/**
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Prints a debug message to the debug output device if the specified
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error level is enabled.
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If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function
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GetDebugPrintErrorLevel (), then print the message specified by Format and
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the associated variable argument list to the debug output device.
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If Format is NULL, then ASSERT().
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@param ErrorLevel The error level of the debug message.
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@param Format Format string for the debug message to print.
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@param VaListMarker VA_LIST marker for the variable argument list.
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**/
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VOID
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EFIAPI
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DebugVPrint (
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IN UINTN ErrorLevel,
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IN CONST CHAR8 *Format,
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IN VA_LIST VaListMarker
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)
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{
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DebugPrintMarker (ErrorLevel, Format, VaListMarker, NULL);
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}
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/**
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Prints a debug message to the debug output device if the specified
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error level is enabled.
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This function use BASE_LIST which would provide a more compatible
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service than VA_LIST.
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If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function
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GetDebugPrintErrorLevel (), then print the message specified by Format and
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the associated variable argument list to the debug output device.
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If Format is NULL, then ASSERT().
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@param ErrorLevel The error level of the debug message.
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@param Format Format string for the debug message to print.
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@param BaseListMarker BASE_LIST marker for the variable argument list.
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**/
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VOID
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EFIAPI
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DebugBPrint (
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IN UINTN ErrorLevel,
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IN CONST CHAR8 *Format,
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IN BASE_LIST BaseListMarker
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)
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{
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DebugPrintMarker (ErrorLevel, Format, mVaListNull, BaseListMarker);
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}
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/**
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Prints an assert message containing a filename, line number, and description.
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This may be followed by a breakpoint or a dead loop.
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Print a message of the form "ASSERT <FileName>(<LineNumber>): <Description>\n"
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to the debug output device. If DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED bit of
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PcdDebugProperyMask is set then CpuBreakpoint() is called. Otherwise, if
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DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED bit of PcdDebugProperyMask is set then
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CpuDeadLoop() is called. If neither of these bits are set, then this function
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returns immediately after the message is printed to the debug output device.
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DebugAssert() must actively prevent recursion. If DebugAssert() is called while
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processing another DebugAssert(), then DebugAssert() must return immediately.
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If FileName is NULL, then a <FileName> string of "(NULL) Filename" is printed.
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If Description is NULL, then a <Description> string of "(NULL) Description" is printed.
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@param FileName The pointer to the name of the source file that generated the assert condition.
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@param LineNumber The line number in the source file that generated the assert condition
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@param Description The pointer to the description of the assert condition.
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**/
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VOID
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EFIAPI
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DebugAssert (
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IN CONST CHAR8 *FileName,
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IN UINTN LineNumber,
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IN CONST CHAR8 *Description
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)
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{
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CHAR8 Buffer[MAX_DEBUG_MESSAGE_LENGTH];
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//
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// Generate the ASSERT() message in Ascii format
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//
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AsciiSPrint (Buffer, sizeof (Buffer), "ASSERT [%a] %a(%d): %a\n",
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gEfiCallerBaseName, FileName, LineNumber, Description);
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if (!mEfiAtRuntime) {
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//
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// Send the print string to the Console Output device
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//
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SerialPortWrite ((UINT8 *)Buffer, AsciiStrLen (Buffer));
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}
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//
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// Generate a Breakpoint, DeadLoop, or NOP based on PCD settings
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//
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if ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED) != 0) {
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CpuBreakpoint ();
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} else if ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED) != 0) {
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CpuDeadLoop ();
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}
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}
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/**
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Fills a target buffer with PcdDebugClearMemoryValue, and returns the target buffer.
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This function fills Length bytes of Buffer with the value specified by
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PcdDebugClearMemoryValue, and returns Buffer.
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If Buffer is NULL, then ASSERT().
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If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
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@param Buffer The pointer to the target buffer to be filled with PcdDebugClearMemoryValue.
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@param Length The number of bytes in Buffer to fill with zeros PcdDebugClearMemoryValue.
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@return Buffer The pointer to the target buffer filled with PcdDebugClearMemoryValue.
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**/
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VOID *
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EFIAPI
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DebugClearMemory (
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OUT VOID *Buffer,
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IN UINTN Length
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)
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{
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//
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// If Buffer is NULL, then ASSERT().
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//
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ASSERT (Buffer != NULL);
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//
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// SetMem() checks for the the ASSERT() condition on Length and returns Buffer
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//
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return SetMem (Buffer, Length, PcdGet8(PcdDebugClearMemoryValue));
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}
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/**
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Returns TRUE if ASSERT() macros are enabled.
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This function returns TRUE if the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of
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PcdDebugProperyMask is set. Otherwise FALSE is returned.
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@retval TRUE The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is set.
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@retval FALSE The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is clear.
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**/
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BOOLEAN
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EFIAPI
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DebugAssertEnabled (
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VOID
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)
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{
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return (BOOLEAN) ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED) != 0);
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}
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/**
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Returns TRUE if DEBUG() macros are enabled.
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This function returns TRUE if the DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of
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PcdDebugProperyMask is set. Otherwise FALSE is returned.
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@retval TRUE The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is set.
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@retval FALSE The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is clear.
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**/
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BOOLEAN
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EFIAPI
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DebugPrintEnabled (
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VOID
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)
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{
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return (BOOLEAN) ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_PRINT_ENABLED) != 0);
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}
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/**
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Returns TRUE if DEBUG_CODE() macros are enabled.
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This function returns TRUE if the DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of
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PcdDebugProperyMask is set. Otherwise FALSE is returned.
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@retval TRUE The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is set.
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@retval FALSE The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is clear.
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**/
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BOOLEAN
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EFIAPI
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DebugCodeEnabled (
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VOID
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)
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{
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return (BOOLEAN) ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_CODE_ENABLED) != 0);
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}
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/**
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Returns TRUE if DEBUG_CLEAR_MEMORY() macro is enabled.
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This function returns TRUE if the DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of
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PcdDebugProperyMask is set. Otherwise FALSE is returned.
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@retval TRUE The DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is set.
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@retval FALSE The DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is clear.
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**/
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BOOLEAN
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EFIAPI
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DebugClearMemoryEnabled (
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VOID
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)
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{
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return (BOOLEAN) ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED) != 0);
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}
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/**
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Returns TRUE if any one of the bit is set both in ErrorLevel and PcdFixedDebugPrintErrorLevel.
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This function compares the bit mask of ErrorLevel and PcdFixedDebugPrintErrorLevel.
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@retval TRUE Current ErrorLevel is supported.
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@retval FALSE Current ErrorLevel is not supported.
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**/
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BOOLEAN
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EFIAPI
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DebugPrintLevelEnabled (
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IN CONST UINTN ErrorLevel
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)
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{
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return (BOOLEAN) ((ErrorLevel & PcdGet32(PcdFixedDebugPrintErrorLevel)) != 0);
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}
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