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OvmfPkg/PlatformDebugLibIoPort: Add new APIs 

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1395

Add new APIs' implementation (DebugVPrint, DebugBPrint)
in the DebugLib instance. These APIs would expose print
routines with VaList parameter and BaseList parameter.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Zhichao Gao <zhichao.gao@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Sean Brogan <sean.brogan@microsoft.com>
Cc: Michael Turner <Michael.Turner@microsoft.com>
Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Bret Barkelew 2019-03-14 17:03:43 +08:00 committed by Liming Gao
parent 92c0bbd18b
commit 2fe5f2f529
1 changed files with 101 additions and 5 deletions
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106
OvmfPkg/Library/PlatformDebugLibIoPort/DebugLib.c
View File

@ -2,7 +2,7 @@
Base Debug library instance for QEMU debug port.
It uses PrintLib to send debug messages to a fixed I/O port.
Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2012, Red Hat, Inc.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
@ -29,6 +29,12 @@
//
#define MAX_DEBUG_MESSAGE_LENGTH 0x100
//
// VA_LIST can not initialize to NULL for all compiler, so we use this to
// indicate a null VA_LIST
//
VA_LIST mVaListNull;
/**
Prints a debug message to the debug output device if the specified error level is enabled.
@ -51,9 +57,41 @@ DebugPrint (
IN CONST CHAR8 *Format,
...
)
{
VA_LIST Marker;
VA_START (Marker, Format);
DebugVPrint (ErrorLevel, Format, Marker);
VA_END (Marker);
}
/**
Prints a debug message to the debug output device if the specified
error level is enabled base on Null-terminated format string and a
VA_LIST argument list or a BASE_LIST argument list.
If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function
GetDebugPrintErrorLevel (), 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.
@param VaListMarker VA_LIST marker for the variable argument list.
@param BaseListMarker BASE_LIST marker for the variable argument list.
**/
VOID
DebugPrintMarker (
IN UINTN ErrorLevel,
IN CONST CHAR8 *Format,
IN VA_LIST VaListMarker,
IN BASE_LIST BaseListMarker
)
{
CHAR8 Buffer[MAX_DEBUG_MESSAGE_LENGTH];
VA_LIST Marker;
UINTN Length;
//
@ -72,9 +110,11 @@ DebugPrint (
//
// Convert the DEBUG() message to an ASCII String
//
VA_START (Marker, Format);
Length = AsciiVSPrint (Buffer, sizeof (Buffer), Format, Marker);
VA_END (Marker);
if (BaseListMarker == NULL) {
Length = AsciiVSPrint (Buffer, sizeof (Buffer), Format, VaListMarker);
} else {
Length = AsciiBSPrint (Buffer, sizeof (Buffer), Format, BaseListMarker);
}
//
// Send the print string to the debug I/O port
@ -83,6 +123,62 @@ DebugPrint (
}
/**
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 DebugPrintErrorLevelLib function
GetDebugPrintErrorLevel (), 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.
@param VaListMarker VA_LIST marker for the variable argument list.
**/
VOID
EFIAPI
DebugVPrint (
IN UINTN ErrorLevel,
IN CONST CHAR8 *Format,
IN VA_LIST VaListMarker
)
{
DebugPrintMarker (ErrorLevel, Format, VaListMarker, NULL);
}
/**
Prints a debug message to the debug output device if the specified
error level is enabled.
This function use BASE_LIST which would provide a more compatible
service than VA_LIST.
If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function
GetDebugPrintErrorLevel (), 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.
@param BaseListMarker BASE_LIST marker for the variable argument list.
**/
VOID
EFIAPI
DebugBPrint (
IN UINTN ErrorLevel,
IN CONST CHAR8 *Format,
IN BASE_LIST BaseListMarker
)
{
DebugPrintMarker (ErrorLevel, Format, mVaListNull, BaseListMarker);
}
/**
Prints an assert message containing a filename, line number, and description.
This may be followed by a breakpoint or a dead loop.