mirror of
https://github.com/acidanthera/audk.git
synced 2025-10-28 09:43:50 +01:00
3b96221f77
Introduce XenPlatformPei, a copy of OvmfPkg/PlatformPei without some
of QEMU specific initialization, Xen does not support QemuFwCfg.
This new module will be adjusted to accommodate Xen PVH.
fw_cfg dependents that have been removed, which are dynamically skipped
when running PlatformPei on Xen:
- GetFirstNonAddress(): controlling the 64-bit PCI MMIO aperture via the
(experimental) "opt/ovmf/X-PciMmio64Mb" file
- GetFirstNonAddress(): honoring the hotplug DIMM area
("etc/reserved-memory-end") in the placement of the 64-bit PCI MMIO
aperture
- NoexecDxeInitialization() is removed, so PcdPropertiesTableEnable and
PcdSetNxForStack are left constant FALSE (not set dynamically from
fw_cfg "opt/ovmf/PcdXxxx")
- MaxCpuCountInitialization(), PublishPeiMemory(): the max CPU count is
not taken from the QemuFwCfgItemSmpCpuCount fw_cfg key;
PcdCpuMaxLogicalProcessorNumber is used intact and
PcdCpuApInitTimeOutInMicroSeconds is never changed or used.
- InitializeXenPlatform(), S3Verification(): S3 is assumed disabled (not
consulting "etc/system-states" via QemuFwCfgS3Enabled()).
- InstallFeatureControlCallback(): the feature control MSR is not set
from "etc/msr_feature_control"
(also removed FeatureControl.c as there is nothing been executed)
Also removed:
- SMRAM/TSEG-related low mem size adjusting (PcdSmmSmramRequire is
assumed FALSE) in PublishPeiMemory(),
- QemuInitializeRam() entirely,
Xen related changes:
- Have removed the module variable mXen, as it should be always true.
- Have the platform PEI initialization fails if Xen has not been
detected.
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1689
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20190813113119.14804-5-anthony.perard@citrix.com>
61 lines
1.1 KiB
C
61 lines
1.1 KiB
C
/** @file
|
|
PC/AT CMOS access routines
|
|
|
|
Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
|
|
Copyright (c) 2019, Citrix Systems, Inc.
|
|
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
|
|
#include "Cmos.h"
|
|
#include "Library/IoLib.h"
|
|
|
|
/**
|
|
Reads 8-bits of CMOS data.
|
|
|
|
Reads the 8-bits of CMOS data at the location specified by Index.
|
|
The 8-bit read value is returned.
|
|
|
|
@param Index The CMOS location to read.
|
|
|
|
@return The value read.
|
|
|
|
**/
|
|
UINT8
|
|
EFIAPI
|
|
CmosRead8 (
|
|
IN UINTN Index
|
|
)
|
|
{
|
|
IoWrite8 (0x70, (UINT8) Index);
|
|
return IoRead8 (0x71);
|
|
}
|
|
|
|
|
|
/**
|
|
Writes 8-bits of CMOS data.
|
|
|
|
Writes 8-bits of CMOS data to the location specified by Index
|
|
with the value specified by Value and returns Value.
|
|
|
|
@param Index The CMOS location to write.
|
|
@param Value The value to write to CMOS.
|
|
|
|
@return The value written to CMOS.
|
|
|
|
**/
|
|
UINT8
|
|
EFIAPI
|
|
CmosWrite8 (
|
|
IN UINTN Index,
|
|
IN UINT8 Value
|
|
)
|
|
{
|
|
IoWrite8 (0x70, (UINT8) Index);
|
|
IoWrite8 (0x71, Value);
|
|
return Value;
|
|
}
|
|
|