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https://github.com/CloverHackyColor/CloverBootloader.git
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82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
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/** @file
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OVMF ACPI Platform Driver for Xen guests
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Copyright (C) 2021, Red Hat, Inc.
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Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/AcpiPlatformLib.h> // InstallAcpiTablesFromMemory()
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#include <Library/DebugLib.h> // DEBUG()
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#include <Library/XenPlatformLib.h> // XenDetected()
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#include "AcpiPlatform.h"
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#define XEN_ACPI_PHYSICAL_ADDRESS 0x000EA020
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#define XEN_BIOS_PHYSICAL_END 0x000FFFFF
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/**
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Effective entrypoint of Acpi Platform driver.
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@param ImageHandle
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@param SystemTable
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@return EFI_SUCCESS
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@return EFI_LOAD_ERROR
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@return EFI_OUT_OF_RESOURCES
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**/
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EFI_STATUS
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EFIAPI
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InstallAcpiTables (
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IN EFI_ACPI_TABLE_PROTOCOL *AcpiTable
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)
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{
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EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *RsdpStructurePtr;
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EFI_XEN_INFO *XenInfo;
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EFI_STATUS Status;
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if (XenDetected ()) {
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//
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// Detect the RSDP structure
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//
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//
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// First look for PVH one
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//
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XenInfo = XenGetInfoHOB ();
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ASSERT (XenInfo != NULL);
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if (XenInfo->RsdpPvh != NULL) {
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DEBUG ((
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DEBUG_INFO,
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"%a: Use ACPI RSDP table at 0x%p\n",
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gEfiCallerBaseName,
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XenInfo->RsdpPvh
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));
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RsdpStructurePtr = XenInfo->RsdpPvh;
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} else {
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//
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// Otherwise, look for the HVM one
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//
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Status = GetAcpiRsdpFromMemory (
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XEN_ACPI_PHYSICAL_ADDRESS,
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XEN_BIOS_PHYSICAL_END,
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&RsdpStructurePtr
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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}
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Status = InstallAcpiTablesFromRsdp (
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AcpiTable,
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RsdpStructurePtr
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);
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} else {
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Status = EFI_UNSUPPORTED;
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}
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return Status;
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}
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