Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com> Cc: Steven Shi <steven.shi@intel.com> Reviewed-by: Star Zeng <star.zeng@intel.com>
Thomas Palmer [Wed, 18 Apr 2018 20:33:14 +0000 (04:33 +0800)]
SecurityPkg/UserProfileManagerDxe: Update RouteConfig function
According to UEFI spec, the RouteConfig protocol function should populate
the Progress pointer with an address inside Configuration. This patch
ensures that these functions are compliant when EFI_NOT_FOUND is returned.
Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Thomas Palmer <thomas.palmer@hpe.com> Reviewed-by: Dandan Bi <dandan.bi@intel.com> Reviewed-by: Eric Dong <eric.dong@intel.com>
Thomas Palmer [Wed, 18 Apr 2018 20:33:13 +0000 (04:33 +0800)]
SecurityPkg/UserIdentifyManagerDxe: Update RouteConfig function
According to UEFI spec, the RouteConfig protocol function should populate
the Progress pointer with an address inside Configuration. This patch
ensures that these functions are compliant when EFI_NOT_FOUND is returned.
Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Thomas Palmer <thomas.palmer@hpe.com> Reviewed-by: Dandan Bi <dandan.bi@intel.com> Reviewed-by: Eric Dong <eric.dong@intel.com>
Thomas Palmer [Wed, 18 Apr 2018 20:33:12 +0000 (04:33 +0800)]
SecurityPkg/PwdCredentialProviderDxe: Update RouteConfig function
According to UEFI spec, the RouteConfig protocol function should populate
the Progress pointer with an address inside Configuration. This patch
ensures that these functions are compliant when EFI_NOT_FOUND is returned.
Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Thomas Palmer <thomas.palmer@hpe.com> Reviewed-by: Dandan Bi <dandan.bi@intel.com> Reviewed-by: Eric Dong <eric.dong@intel.com>
Thomas Palmer [Wed, 18 Apr 2018 20:33:11 +0000 (04:33 +0800)]
SecurityPkg/Tcg2Config: Update RouteConfig function
According to UEFI spec, the RouteConfig protocol function should populate
the Progress pointer with an address inside Configuration. This patch
ensures that these functions are compliant when EFI_NOT_FOUND is returned.
Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Thomas Palmer <thomas.palmer@hpe.com> Reviewed-by: Dandan Bi <dandan.bi@intel.com> Reviewed-by: Eric Dong <eric.dong@intel.com>
Thomas Palmer [Wed, 18 Apr 2018 20:32:27 +0000 (04:32 +0800)]
MdeModulePkg/DriverHealthManagerDxe: Update RouteConfig function
According to UEFI spec, the RouteConfig protocol function should populate
the Progress pointer with an address inside Configuration. This patch
ensures that these functions are compliant when EFI_NOT_FOUND is returned.
Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Thomas Palmer <thomas.palmer@hpe.com> Reviewed-by: Dandan Bi <dandan.bi@intel.com> Reviewed-by: Eric Dong <eric.dong@intel.com>
Thomas Palmer [Wed, 18 Apr 2018 20:32:26 +0000 (04:32 +0800)]
MdeModulePkg/RamDiskDxe: Update RouteConfig function
According to UEFI spec, the RouteConfig protocol function should populate
the Progress pointer with an address inside Configuration. This patch
ensures that these functions are compliant when EFI_NOT_FOUND is returned.
Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Thomas Palmer <thomas.palmer@hpe.com> Reviewed-by: Dandan Bi <dandan.bi@intel.com> Reviewed-by: Eric Dong <eric.dong@intel.com>
Thomas Palmer [Wed, 18 Apr 2018 20:32:25 +0000 (04:32 +0800)]
MdeModulePkg/UiApp: Update RouteConfig function
According to UEFI spec, the RouteConfig protocol function should populate
the Progress pointer with an address inside Configuration. This patch
ensures that these functions are compliant when EFI_NOT_FOUND is returned.
Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Thomas Palmer <thomas.palmer@hpe.com> Reviewed-by: Dandan Bi <dandan.bi@intel.com> Reviewed-by: Eric Dong <eric.dong@intel.com>
Thomas Palmer [Wed, 18 Apr 2018 20:31:35 +0000 (04:31 +0800)]
IntelFrameworkModulePkg/LegacyBootMaintUiLib: Update RouteConfig function
According to UEFI spec, the RouteConfig protocol function should populate
the Progress pointer with an address inside Configuration. This patch
ensures that these functions are compliant when EFI_NOT_FOUND is returned.
Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Thomas Palmer <thomas.palmer@hpe.com> Reviewed-by: Dandan Bi <dandan.bi@intel.com> Reviewed-by: Eric Dong <eric.dong@intel.com>
BaseTools: Replace Binary File type strings with predefined constant
BINARY_FILE_TYPE_FW was 'FW'
BINARY_FILE_TYPE_GUID was 'GUID'
BINARY_FILE_TYPE_PREEFORM was 'PREEFORM'
BINARY_FILE_TYPE_UEFI_APP was 'UEFI_APP'
BINARY_FILE_TYPE_UNI_UI was 'UNI_UI'
BINARY_FILE_TYPE_UNI_VER was 'UNI_VER'
BINARY_FILE_TYPE_LIB was 'LIB'
BINARY_FILE_TYPE_PE32 was 'PE32'
BINARY_FILE_TYPE_PIC was 'PIC'
BINARY_FILE_TYPE_PEI_DEPEX was 'PEI_DEPEX'
BINARY_FILE_TYPE_DXE_DEPEX was 'DXE_DEPEX'
BINARY_FILE_TYPE_SMM_DEPEX was 'SMM_DEPEX'
BINARY_FILE_TYPE_TE was 'TE'
BINARY_FILE_TYPE_VER was 'VER'
BINARY_FILE_TYPE_UI was 'UI'
BINARY_FILE_TYPE_BIN was 'BIN'
BINARY_FILE_TYPE_FV was 'FV'
v2 - split apart FV and GUID types with different meanings.
BaseTools: Replace EDK Component strings with predefined constant
EDK_COMPONENT_TYPE_LIBRARY was 'LIBRARY'
EDK_COMPONENT_TYPE_SECURITY_CORE was 'SECURITY_CORE'
EDK_COMPONENT_TYPE_COMBINED_PEIM_DRIVER was 'COMBINED_PEIM_DRIVER'
EDK_COMPONENT_TYPE_PIC_PEIM was 'PIC_PEIM'
EDK_COMPONENT_TYPE_RELOCATABLE_PEIM was 'RELOCATABLE_PEIM'
EDK_COMPONENT_TYPE_BS_DRIVER was 'BS_DRIVER'
EDK_COMPONENT_TYPE_RT_DRIVER was 'RT_DRIVER'
EDK_COMPONENT_TYPE_SAL_RT_DRIVER was 'SAL_RT_DRIVER'
EDK_COMPONENT_TYPE_APPLICATION was 'APPLICATION'
v2 - revert 2 files. will update later in own patches.
v3 - fix v2
BaseTools: replace string constants used for module types
replace raw strings in the code (note: except UPT) with constants.
SUP_MODULE_BASE was 'BASE'
SUP_MODULE_SEC was 'SEC'
SUP_MODULE_PEI_CORE was 'PEI_CORE'
SUP_MODULE_PEIM was 'PEIM'
SUP_MODULE_DXE_CORE was 'DXE_CORE'
SUP_MODULE_DXE_DRIVER was 'DXE_DRIVER'
SUP_MODULE_DXE_RUNTIME_DRIVER was 'DXE_RUNTIME_DRIVER'
SUP_MODULE_DXE_SAL_DRIVER was 'DXE_SAL_DRIVER'
SUP_MODULE_DXE_SMM_DRIVER was 'DXE_SMM_DRIVER'
SUP_MODULE_UEFI_DRIVER was 'UEFI_DRIVER'
SUP_MODULE_UEFI_APPLICATION was 'UEFI_APPLICATION'
SUP_MODULE_USER_DEFINED was 'USER_DEFINED'
SUP_MODULE_SMM_CORE was 'SMM_CORE'
SUP_MODULE_MM_STANDALONE was 'MM_STANDALONE'
SUP_MODULE_MM_CORE_STANDALONE was 'MM_CORE_STANDALONE'
Haojian Zhuang [Thu, 8 Mar 2018 13:28:22 +0000 (21:28 +0800)]
EmbeddedPkg/Drivers: add virtual keyboard driver
This driver is used to simulate a keyboard. For example, user
could read GPIO setting or data from RAM address. If the value
matches the expected pattern, it could trigger a key pressed
event.
User needs to implement hooks of PLATFORM_VIRTUAL_KBD_PROTOCOL.
There're 4 hooks in this protocol.
Register(): Quote the interface that user needs. For example, user
needs to locate GPIO protocol if he wants to simulate a GPIO value
as a key.
Reset(): Do the initialization before reading value.
Query(): Read value. If the value matches the expected pattern,
trigger a key pressed event.
Clear(): Clean the value if necessary.
provide write access to ARM Generic Watchdog registers and use the values
returned by MmioWrite32() and MmioWrite64() as EFI_STATUS return codes.
Because MmioWriteXY() return the value passed as its write parameter,
Generic Watchdog access functions can spuriously return error codes which
are different from EFI_SUCCESS, e.g. the following call
Status = WatchdogWriteOffsetRegister (MAX_UINT32);
if (EFI_ERROR (Status)) {
return Status;
}
will return MAX_UINT32 defined in MdePkg/Include/Base.h as
#define MAX_UINT32 ((UINT32)0xFFFFFFFF)
This commit declares all the functions listed above as VOID
and removes the code for checking their return values.
ArmVirtPkg: use protocol-based DevicePathLib instance for most DXE modules
Port OvmfPkg commit 5c3481b0b611e to ArmVirtPkg. Some explanation should
be in order (because 5c3481b0b611e doesn't offer any):
- The UefiDevicePathLibDevicePathProtocol instance uses the Device Path
Utilities Protocol, produced by DevicePathDxe, for formatting and
parsing the textual device path representation. This allows for a
lighter weight lib instance that gets linked into several DXE modules.
In comparison, the more standalone UefiDevicePathLib instance includes
the formatting and parsing routines in every client module.
- The DXE core needs DevicePathLib before it dispatches DevicePathDxe, so
it needs to stick with the standalone instance.
- DevicePathDxe itself also needs the standalone instance, for
implementing the protocol.
- The DXE-phase PCD driver, "MdeModulePkg/Universal/PCD/Dxe/Pcd.inf",
depends on DevicePathLib via UefiLib and DxeServicesLib at the least; so
with this update, it inherits a dependency on the protocol. In reverse,
DevicePathDxe depends on the PCD Protocol, via PcdLib. The cycle is
broken by using BasePcdLibNull in DevicePathDxe. That restricts it to
FixedAtBuild, Patch, and FeatureFlag PCDs, but that's fine.
Example space savings (using ArmVirtQemu and the GCC5 toolchain):
- NOOPT: 187KB in FVMAIN, 12KB in FVMAIN_COMPACT
- DEBUG: 147KB in FVMAIN, 20KB in FVMAIN_COMPACT
- RELEASE: 123KB in FVMAIN, 17KB in FVMAIN_COMPACT
CryptoPkg/OpensslLib: remove OpenSSL version number from OpenSSL-HOWTO.txt
Remove any concrete OpenSSL version numbers from "OpenSSL-HOWTO.txt". That
information is out of date and there's no reason for us to refresh it:
We now track stable OpenSSL releases via a git submodule. CryptoPkg
maintainers push such submodule updates to edk2 that identify the correct
stable releases of OpenSSL. "OpenSSL-HOWTO.txt" already provides
instructions to users for updating their local submodules.
Cc: Qin Long <qin.long@intel.com> Cc: Ting Ye <ting.ye@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Long Qin <qin.long@intel.com>
Commit 411a373ed642 ("ArmPkg/TimerDxe: remove workaround for KVM timer
handling") removed the virtual timer handling quirk that cleared the
mask bit in the control register when enabling the timer, under the
assumption that only ancient KVM host implementations required it.
However, Julien reports that Xen also masks the timer interrupt in the
guest view of the timer control register, and therefore needs the same
quirk.
So let's reinstate it, but using a Xen specific implementation of the
timer support library, so that other virt platforms remain unchanged.
ArmPkg: add reenable hook to ArmGenericTimerCounterLib
In preparation of selectively reinstating the timer enable quirk for Xen
that we removed in commit 411a373ed642 ("ArmPkg/TimerDxe: remove workaround
for KVM timer handling"), add a ArmGenericTimerReenableTimer() library
function to ArmGenericTimerCounterLib that we will populate for Xen only.
In NvmeExpressPassthru.c near line 659:
Prp = NvmeCreatePrpList (
PciIo,
PhyAddr,
EFI_SIZE_TO_PAGES(Offset + Bytes) - 1,
&PrpListHost,
&PrpListNo,
&MapPrpList
);
if (Prp == NULL) {
goto EXIT;
}
Status is not set to an error code - Status is initialized to
EFI_SUCCESS, or set by a PciIo->Map to EFI_SUCCESS above this
code. This error path should set Status to an error code before
goto EXIT.
Change-Id: I8a5cdf981aa609534c205d3676395805ac60a003 Cc: Hao Wu <hao.a.wu@intel.com> Cc: Ruiyu Ni <ruiyu.ni@intel.com> Cc: Michael Turner <Michael.Turner@microsoft.com>
Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Star Zeng <star.zeng@intel.com> Reviewed-by: Hao Wu <hao.a.wu@intel.com>
We see UEFI spec is saying to use EfiBootServicesData for ESRT table.
UEFI 2.7 chapter 23.3:
The ESRT shall be stored in memory of type EfiBootServicesData.
And we see EsrtDxe is using AllocatePool for ESRT table, but
EsrtFmpDxe is using AllocateRuntimeZeroPool for ESRT table.
This patch updates code to use EfiBootServicesData for ESRT table
in EsrtFmpDxe.
Change-Id: I72a73e0cc0a37e429cc262d68eb284fb268cb5ef Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Sean Brogan <sean.brogan@microsoft.com>
Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Star Zeng <star.zeng@intel.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com> Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
Star Zeng [Mon, 9 Apr 2018 02:10:40 +0000 (10:10 +0800)]
UefiCpuPkg MpInitLib: Fix typo "sCPUID" to "CPUID"
Cc: Eric Dong <eric.dong@intel.com> Cc: Ruiyu Ni <ruiyu.ni@intel.com> Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Star Zeng <star.zeng@intel.com> Reviewed-by: Eric Dong <eric.dong@intel.com>
Gary Lin [Tue, 24 Apr 2018 08:35:44 +0000 (16:35 +0800)]
OvmfPkg/README: add HTTPS Boot
Add the new section for HTTPS Boot.
Changes in v2:
- Fixed the typos
- Added the command for p11-kit based on Laszlo's suggestion
- Also added the efisiglist command
- Elaborated how to create the customized cipher suite list
- Mentioned the changes in QEMU in the future based on Laszlo's
suggestion
Cc: Andrew Fish <afish@apple.com> Cc: Laszlo Ersek <lersek@redhat.com> Cc: Michael D Kinney <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org> Acked-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Andrew J. Fish <afish@apple.com>
Girish Pathak [Mon, 15 Jan 2018 14:53:26 +0000 (14:53 +0000)]
ArmPkg: Introduce SCMI protocol
This change introduces a new SCMI protocol driver for
Arm systems. The driver currently supports only clock
and performance management protocols. Other protocols
will be added as and when needed.
Clock management protocol is used to configure various clocks
available on the platform e.g. HDLCD clock on the Juno platforms.
Whereas performance management protocol allows adjustment
of various performance domains. Currently this is used to evaluate
performance of the Juno platform.
Girish Pathak [Mon, 15 Jan 2018 14:41:51 +0000 (14:41 +0000)]
ArmPkg: MTL Library interface and Null library implementation
Upcoming new component ArmPkg/Drivers/ArmScmiDxe is dependent on
platform specific ArmMtlLib library implementation, however in order
to be able to build the ArmScmiDxe component outside of the context of a
particular platform, this change adds Null implementation of the
ArmMtlLib along with ARM MTL library header.
This change adds support for the ARM Mali DP500/DP500/DP650 display
processors using the GOP protocol. It has been tested on FVP base
models + DP550 support. This change adds platform independant LcdHwLib
library. A corresponding platform specific library will be submitted
to edk-platforms/Platform/ARM/VExpressPkg.
This change does not modify functionality provided by PL111 or
HDLCD. This LcdHwLib implementation should be suitable for those
platforms that implement ARM Mali DP500/DP550/DP650 replacing
PL111/HDLCD.
Only graphics layer of the ARM Mali DP is configured for rendering
the RGB/BGR format frame buffer to satisfy the UEFI GOP requirements
Other layers e.g. video layers are not configured.
Currently framebuffer memory is either reserved in special VRAM or
dynamically allocated using boot services memory allocation functions.
When allocated using boot services calls the memory has to be allocated
as EfiBootServicesData. Unfortunately failures have been seen with this
case. There is also an unfortunate lack of control on the placement of
the framebuffer.
This change introduces two PCDs, PcdArmLcdFrameBufferBase and
PcdArmLcdFrameBufferSize which enable build time reservation of the
framebuffer, avoiding the need to allocate dynamically. This allows
the framebuffer to appear as "I/O memory" outside of the normal RAM
map, which is similar to the "VRAM" case.
This change has no impact on current code, only enables the option
of build time reservation of framebuffers.
ArmPlatformPkg: PCD to swap red/blue format for HDLCD
This change adds a new PCD PcdArmHdlcdSwapBlueRedSelect
to swap values for HDLCD RED_SELECT and BLUE_SELECT registers
on platforms where blue and red hardware lines are swapped.
If set to TRUE in the platform dsc, HDLCD library will swap the values
while setting RED_SELECT and BLUE_SELECT registers. The default
value of the PCD is FALSE.
NOTE: The motive for this is that a discrepancy in the Red/Blue lines
exists between some VersatileExpress platforms. Rather than have
divergent code, this build switch allows a simple, pragmatic solution.
Current HDLCD and PL111 platform libraries do not support display modes
with PixelBlueGreenRedReserved8BitPerColor format, i.e. because of
historical confusion, they do not support the UEFI default
PixelBlueGreenRedReserved8BitPerColor format
In LcdPlatformLib for PL111, LcdPlatformQueryMode returns the pixel
format as PixelRedGreenBlueReserved8BitPerColor which is wrong, because
that does not match the display controller's pixel format which is set
to BGR in PL111Lcd LcdHwLib.
Also it is not possible to configure pixel format as RGB/BGR for the
display modes for a platform at build time.
This change adds PcdGopPixelFormat to configure pixel format as
PixelRedGreenBlueReserved8BitPerColor or
PixelBlueGreenRedReserved8BitPerColor or
PixelBitMask.
With this change, pixel format can be selected in the platform specific
.dsc file for all supported display modes.
Support for PixelBitMask is not implemented in PL111 or HDLCD LcdHwLib
libraries, hence HDLCD and PL111 platform libraries will return error
EFI_UNSUPPORTED if PcdGopPixelFormat is set to PixelBitMask. Indeed,
it is not clear what selecting PixelBitMask might mean, but the option
is allowed as it might suit a custom platform.
ArmPlatformPkg: Redefine LcdPlatformGetTimings function
The LcdPlatformGetTimings interface function takes similar sets of
multiple parameters for horizontal and vertical timings which can be
aggregated in a common data type. This change defines a structure
SCAN_TIMINGS for this which can be used to describe both horizontal and
vertical scan timings, and accordingly redefines the
LcdPlatformGetTiming interface, greatly reducing the amount of data
passed about.
Girish Pathak [Wed, 14 Feb 2018 11:52:46 +0000 (11:52 +0000)]
ArmPlatformPkg: PL111Lcd: Combine two writes to LCDControl
Currenty bit LcdPwr of the LCDControl register is enabled immediately
after setting other bits of the LCDControl register. This two write
sequence is unnecessary. This change removes this extra write by setting
LcdPwr bit along with other bits of the LcdControl register.
There is no functional modification in this change
some comments are modified and a few new comments are added.
This is to prevent mixing formatting changes with functional
changes.
There is no functional modification in this change
As preparation for further work, the formatting is corrected to meet
the EDKII coding standard.
Of specific note, some invalid include guards were fixed.
Girish Pathak [Mon, 15 Jan 2018 18:13:10 +0000 (18:13 +0000)]
ArmPlatformPkg: Rectify line endings of LcdHwNullLib
This fix changes line endings of LcdHwNullLib.c to DOS
style line endings from UNIX style line endings to meet the
EDK2 coding standard. Note it also fixes an end of line
whitespace.
Ruiyu Ni [Fri, 20 Apr 2018 08:08:22 +0000 (16:08 +0800)]
ShellPkg: Add acpiview tool to dump ACPI tables
This program is provided to allow examination of ACPI table contents
from the UEFI Shell. This can help with investigations, especially at
that stage where the tables are not enabling an OS to boot.
The program is not exhaustive, and only encapsulates detailed knowledge
of a limited number of table types.
Default behaviour is to display the content of all tables installed.
'Known' table types will be parsed and displayed with descriptions and
field values. Where appropriate a degree of consistency checking is
done and errors may be reported in the output.
Other table types will be displayed as an array of Hexadecimal bytes.
To facilitate debugging, the -s and -d options can be used to generate a
binary file image of a table that can be copied elsewhere for
investigation using tools such as those provided by acpica.org. This is
especially relevant for AML type tables like DSDT and SSDT.
The inspiration for this is the existing smbiosview Debug1 Shell
command.
Many tables are not explicitly handled, in part because no examples are
available for our testing.
The program is designed to be extended to new tables with minimal
effort, and contributions are invited.
PcdRsa2048Sha256PublicKeyBuffer is referenced but not used in the
library, that makes me a little confusing.
Actually, the PublicKeyData should be from the caller of
AuthenticateFmpImage() as input parameter, for example
EdkiiSystemCapsuleLib.
This patch is to remove the PCD reference in this library instance
to be aligned with FmpAuthenticationLibPkcs7 that does not reference
PcdPkcs7CertBuffer.
Cc: Chao Zhang <chao.b.zhang@intel.com> Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Star Zeng <star.zeng@intel.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Ard Biesheuvel [Thu, 15 Mar 2018 10:13:01 +0000 (10:13 +0000)]
ArmPkg/TimerDxe: remove workaround for KVM timer handling
When we first ported EDK2 to KVM/arm, we implemented a workaround for
the quirky timer handling on the KVM side. This has been fixed in
Linux commit f120cd6533d2 ("KVM: arm/arm64: timer: Allow the timer to
control the active state") dated 23 June 2014, which was incorporated
into Linux release 4.3.
So almost 4 years later, it should be safe to drop this workaround on
the EDK2 side.
IntelFrameworkModulePkg IsaSerialDxe: Update algorithm to calculate Divisor
To align the way in MdeModulePkg SerialPortLib and PciSioSerialDxe driver,
Divisor is added by one when the reminder is more than half (16 * BaudRate).
Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Liming Gao <liming.gao@intel.com> Cc: Ruiyu Ni <ruiyu.ni@intel.com> Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>