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OvmfPkg/PlatformDebugLibIoPort: factor out debug port detection

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Factor out debug port detection in PlatformDebugLibIoPort.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Message-Id: <20200423095358.2518197-4-anthony.perard@citrix.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Anthony PERARD 2020-04-23 10:53:56 +01:00 committed by mergify[bot]
parent 61ac4fc70d
commit 52f012129a
5 changed files with 36 additions and 22 deletions
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34
OvmfPkg/Library/PlatformDebugLibIoPort/DebugIoPortQemu.c Normal file
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@ -0,0 +1,34 @@
/** @file
Detection code for QEMU debug port.
Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2012, Red Hat, Inc.<BR>
Copyright (c) 2020, Citrix Systems, Inc.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Library/IoLib.h>
#include <Library/PcdLib.h>
#include "DebugLibDetect.h"
//
// The constant value that is read from the debug I/O port
//
#define BOCHS_DEBUG_PORT_MAGIC 0xE9
/**
Return the result of detecting the debug I/O port device.
@retval TRUE if the debug I/O port device was detected.
@retval FALSE otherwise
**/
BOOLEAN
EFIAPI
PlatformDebugLibIoPortDetect (
VOID
)
{
return IoRead8 (PcdGet16 (PcdDebugIoPort)) == BOCHS_DEBUG_PORT_MAGIC;
}

16
OvmfPkg/Library/PlatformDebugLibIoPort/DebugLib.c
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@ -359,19 +359,3 @@ DebugPrintLevelEnabled (
{
return (BOOLEAN) ((ErrorLevel & PcdGet32(PcdFixedDebugPrintErrorLevel)) != 0);
}
/**
Return the result of detecting the debug I/O port device.
@retval TRUE if the debug I/O port device was detected.
@retval FALSE otherwise
**/
BOOLEAN
EFIAPI
PlatformDebugLibIoPortDetect (
VOID
)
{
return IoRead8 (PcdGet16 (PcdDebugIoPort)) == BOCHS_DEBUG_PORT_MAGIC;
}

6
OvmfPkg/Library/PlatformDebugLibIoPort/DebugLibDetect.h
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@ -12,12 +12,6 @@
#include <Base.h>
//
// The constant value that is read from the debug I/O port
//
#define BOCHS_DEBUG_PORT_MAGIC 0xE9
/**
Helper function to return whether the virtual machine has a debug I/O port.
PlatformDebugLibIoPortFound can call this function directly or cache the

1
OvmfPkg/Library/PlatformDebugLibIoPort/PlatformDebugLibIoPort.inf
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@ -24,6 +24,7 @@
#
[Sources]
DebugIoPortQemu.c
DebugLib.c
DebugLibDetect.c
DebugLibDetect.h

1
OvmfPkg/Library/PlatformDebugLibIoPort/PlatformRomDebugLibIoPort.inf
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@ -24,6 +24,7 @@
#
[Sources]
DebugIoPortQemu.c
DebugLib.c
DebugLibDetect.h
DebugLibDetectRom.c