26af9aca92
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jordan Justen <jordan.l.justen@intel.com> git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13602 6f19259b-4bc3-4df7-8a09-765794883524
319 lines
9.6 KiB
C
319 lines
9.6 KiB
C
/** @file
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OVMF ACPI Xen support
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Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>
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Copyright (c) 2012, Bei Guan <gbtju85@gmail.com>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "AcpiPlatform.h"
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#include <Library/HobLib.h>
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#include <Guid/XenInfo.h>
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#include <Library/BaseLib.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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EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *XenAcpiRsdpStructurePtr = NULL;
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/**
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This function detects if OVMF is running on Xen.
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**/
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BOOLEAN
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XenDetected (
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VOID
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)
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{
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EFI_HOB_GUID_TYPE *GuidHob;
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//
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// See if a XenInfo HOB is available
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//
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GuidHob = GetFirstGuidHob (&gEfiXenInfoGuid);
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if (GuidHob == NULL) {
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return FALSE;
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}
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return TRUE;
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}
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/**
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Get the address of Xen ACPI Root System Description Pointer (RSDP)
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structure.
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@param RsdpStructurePtr Return pointer to RSDP structure
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@return EFI_SUCCESS Find Xen RSDP structure successfully.
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@return EFI_NOT_FOUND Don't find Xen RSDP structure.
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@return EFI_ABORTED Find Xen RSDP structure, but it's not integrated.
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**/
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EFI_STATUS
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EFIAPI
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GetXenAcpiRsdp (
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OUT EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER **RsdpPtr
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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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UINT8 *XenAcpiPtr;
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UINT8 Sum;
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//
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// Detect the RSDP structure
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//
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for (XenAcpiPtr = (UINT8*)(UINTN) XEN_ACPI_PHYSICAL_ADDRESS;
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XenAcpiPtr < (UINT8*)(UINTN) XEN_BIOS_PHYSICAL_END;
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XenAcpiPtr += 0x10) {
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RsdpStructurePtr = (EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *)
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(UINTN) XenAcpiPtr;
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if (!AsciiStrnCmp ((CHAR8 *) &RsdpStructurePtr->Signature, "RSD PTR ", 8)) {
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//
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// RSDP ACPI 1.0 checksum for 1.0/2.0/3.0 table.
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// This is only the first 20 bytes of the structure
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//
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Sum = CalculateSum8 (
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(CONST UINT8 *)RsdpStructurePtr,
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sizeof (EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_POINTER)
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);
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if (Sum != 0) {
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return EFI_ABORTED;
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}
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if (RsdpStructurePtr->Revision >= 2) {
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//
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// RSDP ACPI 2.0/3.0 checksum, this is the entire table
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//
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Sum = CalculateSum8 (
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(CONST UINT8 *)RsdpStructurePtr,
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sizeof (EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER)
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);
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if (Sum != 0) {
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return EFI_ABORTED;
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}
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}
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*RsdpPtr = RsdpStructurePtr;
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return EFI_SUCCESS;
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}
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}
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return EFI_NOT_FOUND;
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}
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/**
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Get Xen Acpi tables from the RSDP structure. And installs Xen ACPI tables
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into the RSDT/XSDT using InstallAcpiTable. Some signature of the installed
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ACPI tables are: FACP, APIC, HPET, WAET, SSDT, FACS, DSDT.
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@param AcpiProtocol Protocol instance pointer.
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@return EFI_SUCCESS The table was successfully inserted.
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@return EFI_INVALID_PARAMETER Either AcpiTableBuffer is NULL, TableHandle is
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NULL, or AcpiTableBufferSize and the size
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field embedded in the ACPI table pointed to
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by AcpiTableBuffer are not in sync.
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@return EFI_OUT_OF_RESOURCES Insufficient resources exist to complete the request.
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**/
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EFI_STATUS
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EFIAPI
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InstallXenTables (
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IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol
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)
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{
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EFI_STATUS Status;
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UINTN TableHandle;
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EFI_ACPI_DESCRIPTION_HEADER *Rsdt;
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EFI_ACPI_DESCRIPTION_HEADER *Xsdt;
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VOID *CurrentTableEntry;
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UINTN CurrentTablePointer;
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EFI_ACPI_DESCRIPTION_HEADER *CurrentTable;
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UINTN Index;
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UINTN NumberOfTableEntries;
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EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *Fadt2Table;
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EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE *Fadt1Table;
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EFI_ACPI_2_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *Facs2Table;
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EFI_ACPI_1_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *Facs1Table;
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EFI_ACPI_DESCRIPTION_HEADER *DsdtTable;
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Fadt2Table = NULL;
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Fadt1Table = NULL;
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Facs2Table = NULL;
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Facs1Table = NULL;
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DsdtTable = NULL;
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TableHandle = 0;
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NumberOfTableEntries = 0;
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//
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// Try to find Xen ACPI tables
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//
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Status = GetXenAcpiRsdp (&XenAcpiRsdpStructurePtr);
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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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// If XSDT table is find, just install its tables.
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// Otherwise, try to find and install the RSDT tables.
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//
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if (XenAcpiRsdpStructurePtr->XsdtAddress) {
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//
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// Retrieve the addresses of XSDT and
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// calculate the number of its table entries.
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//
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Xsdt = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN)
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XenAcpiRsdpStructurePtr->XsdtAddress;
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NumberOfTableEntries = (Xsdt->Length -
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sizeof (EFI_ACPI_DESCRIPTION_HEADER)) /
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sizeof (UINT64);
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//
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// Install ACPI tables found in XSDT.
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//
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for (Index = 0; Index < NumberOfTableEntries; Index++) {
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//
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// Get the table entry from XSDT
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//
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CurrentTableEntry = (VOID *) ((UINT8 *) Xsdt +
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sizeof (EFI_ACPI_DESCRIPTION_HEADER) +
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Index * sizeof (UINT64));
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CurrentTablePointer = (UINTN) *(UINT64 *)CurrentTableEntry;
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CurrentTable = (EFI_ACPI_DESCRIPTION_HEADER *) CurrentTablePointer;
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//
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// Install the XSDT tables
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//
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Status = InstallAcpiTable (
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AcpiProtocol,
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CurrentTable,
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CurrentTable->Length,
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&TableHandle
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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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// Get the FACS and DSDT table address from the table FADT
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//
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if (!AsciiStrnCmp ((CHAR8 *) &CurrentTable->Signature, "FACP", 4)) {
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Fadt2Table = (EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *)
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(UINTN) CurrentTablePointer;
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Facs2Table = (EFI_ACPI_2_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *)
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(UINTN) Fadt2Table->FirmwareCtrl;
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DsdtTable = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN) Fadt2Table->Dsdt;
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}
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}
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}
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else if (XenAcpiRsdpStructurePtr->RsdtAddress) {
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//
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// Retrieve the addresses of RSDT and
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// calculate the number of its table entries.
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//
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Rsdt = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN)
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XenAcpiRsdpStructurePtr->RsdtAddress;
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NumberOfTableEntries = (Rsdt->Length -
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sizeof (EFI_ACPI_DESCRIPTION_HEADER)) /
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sizeof (UINT32);
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//
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// Install ACPI tables found in XSDT.
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//
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for (Index = 0; Index < NumberOfTableEntries; Index++) {
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//
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// Get the table entry from RSDT
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//
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CurrentTableEntry = (UINT32 *) ((UINT8 *) Rsdt +
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sizeof (EFI_ACPI_DESCRIPTION_HEADER) +
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Index * sizeof (UINT32));
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CurrentTablePointer = *(UINT32 *)CurrentTableEntry;
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CurrentTable = (EFI_ACPI_DESCRIPTION_HEADER *) CurrentTablePointer;
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//
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// Install the RSDT tables
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//
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Status = InstallAcpiTable (
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AcpiProtocol,
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CurrentTable,
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CurrentTable->Length,
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&TableHandle
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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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// Get the FACS and DSDT table address from the table FADT
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//
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if (!AsciiStrnCmp ((CHAR8 *) &CurrentTable->Signature, "FACP", 4)) {
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Fadt1Table = (EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE *)
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(UINTN) CurrentTablePointer;
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Facs1Table = (EFI_ACPI_1_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *)
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(UINTN) Fadt1Table->FirmwareCtrl;
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DsdtTable = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN) Fadt1Table->Dsdt;
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}
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}
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}
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//
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// Install the FACS table.
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//
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if (Fadt2Table) {
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//
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// FACS 2.0
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//
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Status = InstallAcpiTable (
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AcpiProtocol,
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Facs2Table,
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Facs2Table->Length,
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&TableHandle
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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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else if (Fadt1Table) {
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//
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// FACS 1.0
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//
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Status = InstallAcpiTable (
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AcpiProtocol,
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Facs1Table,
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Facs1Table->Length,
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&TableHandle
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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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//
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// Install DSDT table.
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//
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Status = InstallAcpiTable (
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AcpiProtocol,
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DsdtTable,
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DsdtTable->Length,
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&TableHandle
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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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return EFI_SUCCESS;
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}
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