c75c640512
Calculate the frequency of the APIC timer that Xen provides. Even though the frequency is currently hard-coded, it isn't part of the public ABI that Xen provides and thus may change at any time. OVMF needs to determine the frequency by an other mean. Fortunately, Xen provides a way to determines the frequency of the TSC, so we can use TSC to calibrate the frequency of the APIC timer. That information is found in the shared_info page which we map and unmap once done (XenBusDxe is going to map the page somewhere else). The shared_info page is mapped at the highest physical address allowed as it doesn't need to be in the RAM, thus there's a call to update the page table. The calculated frequency is only logged in this patch, it will be used in a following patch. Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2490 Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Acked-by: Laszlo Ersek <lersek@redhat.com> Message-Id: <20210412133003.146438-7-anthony.perard@citrix.com>
147 lines
2.2 KiB
C
147 lines
2.2 KiB
C
/** @file
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Platform PEI module include file.
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Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
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Copyright (c) 2019, Citrix Systems, Inc.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef _PLATFORM_PEI_H_INCLUDED_
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#define _PLATFORM_PEI_H_INCLUDED_
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#include <IndustryStandard/E820.h>
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VOID
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AddIoMemoryBaseSizeHob (
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EFI_PHYSICAL_ADDRESS MemoryBase,
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UINT64 MemorySize
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);
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VOID
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AddIoMemoryRangeHob (
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EFI_PHYSICAL_ADDRESS MemoryBase,
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EFI_PHYSICAL_ADDRESS MemoryLimit
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);
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VOID
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AddMemoryBaseSizeHob (
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EFI_PHYSICAL_ADDRESS MemoryBase,
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UINT64 MemorySize
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);
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VOID
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AddMemoryRangeHob (
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EFI_PHYSICAL_ADDRESS MemoryBase,
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EFI_PHYSICAL_ADDRESS MemoryLimit
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);
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VOID
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AddReservedMemoryBaseSizeHob (
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EFI_PHYSICAL_ADDRESS MemoryBase,
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UINT64 MemorySize,
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BOOLEAN Cacheable
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);
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VOID
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AddReservedMemoryRangeHob (
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EFI_PHYSICAL_ADDRESS MemoryBase,
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EFI_PHYSICAL_ADDRESS MemoryLimit,
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BOOLEAN Cacheable
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);
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VOID
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AddressWidthInitialization (
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VOID
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);
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VOID
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Q35TsegMbytesInitialization (
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VOID
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);
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EFI_STATUS
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PublishPeiMemory (
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VOID
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);
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UINT32
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GetSystemMemorySizeBelow4gb (
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VOID
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);
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VOID
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InitializeRamRegions (
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VOID
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);
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EFI_STATUS
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PeiFvInitialization (
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VOID
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);
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VOID
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InstallClearCacheCallback (
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VOID
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);
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EFI_STATUS
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XenConnect (
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VOID
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);
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EFI_STATUS
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InitializeXen (
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VOID
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);
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BOOLEAN
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XenDetect (
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VOID
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);
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BOOLEAN
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XenHvmloaderDetected (
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VOID
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);
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BOOLEAN
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XenPvhDetected (
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VOID
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);
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VOID
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AmdSevInitialize (
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VOID
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);
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VOID
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XenPublishRamRegions (
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VOID
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);
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EFI_STATUS
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XenGetE820Map (
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EFI_E820_ENTRY64 **Entries,
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UINT32 *Count
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);
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EFI_STATUS
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PhysicalAddressIdentityMapping (
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IN EFI_PHYSICAL_ADDRESS AddressToMap
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);
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VOID
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CalibrateLapicTimer (
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VOID
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);
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extern EFI_BOOT_MODE mBootMode;
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extern UINT8 mPhysMemAddressWidth;
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extern UINT16 mHostBridgeDevId;
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#endif // _PLATFORM_PEI_H_INCLUDED_
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