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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH RFC 04/14] OvmfPkg: Introduce XenPlatformPei
A copy of OvmfPkg/PlatformPei without some of QEMU specific
initialization, Xen does not support QemuFwCfg.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
OvmfPkg/XenOvmf.dsc | 2 +-
OvmfPkg/XenOvmf.fdf | 2 +-
OvmfPkg/XenPlatformPei/Cmos.c | 64 ++++
OvmfPkg/XenPlatformPei/Cmos.h | 56 ++++
OvmfPkg/XenPlatformPei/Fv.c | 100 ++++++
OvmfPkg/XenPlatformPei/MemDetect.c | 449 +++++++++++++++++++++++++
OvmfPkg/XenPlatformPei/Platform.c | 536 ++++++++++++++++++++++++++++++
OvmfPkg/XenPlatformPei/Platform.h | 104 ++++++
OvmfPkg/XenPlatformPei/Xen.c | 231 +++++++++++++
OvmfPkg/XenPlatformPei/Xen.h | 45 +++
OvmfPkg/XenPlatformPei/XenPlatformPei.inf | 110 ++++++
11 files changed, 1697 insertions(+), 2 deletions(-)
create mode 100644 OvmfPkg/XenPlatformPei/Cmos.c
create mode 100644 OvmfPkg/XenPlatformPei/Cmos.h
create mode 100644 OvmfPkg/XenPlatformPei/Fv.c
create mode 100644 OvmfPkg/XenPlatformPei/MemDetect.c
create mode 100644 OvmfPkg/XenPlatformPei/Platform.c
create mode 100644 OvmfPkg/XenPlatformPei/Platform.h
create mode 100644 OvmfPkg/XenPlatformPei/Xen.c
create mode 100644 OvmfPkg/XenPlatformPei/Xen.h
create mode 100644 OvmfPkg/XenPlatformPei/XenPlatformPei.inf
diff --git a/OvmfPkg/XenOvmf.dsc b/OvmfPkg/XenOvmf.dsc
index 0a7ea21..ef32c33 100644
--- a/OvmfPkg/XenOvmf.dsc
+++ b/OvmfPkg/XenOvmf.dsc
@@ -496,7 +496,7 @@
PcdLib|MdePkg/Library/PeiPcdLib/PeiPcdLib.inf
}
- OvmfPkg/PlatformPei/PlatformPei.inf {
+ OvmfPkg/XenPlatformPei/XenPlatformPei.inf {
<LibraryClasses>
PcdLib|MdePkg/Library/PeiPcdLib/PeiPcdLib.inf
}
diff --git a/OvmfPkg/XenOvmf.fdf b/OvmfPkg/XenOvmf.fdf
index f4609b0..c211f61 100644
--- a/OvmfPkg/XenOvmf.fdf
+++ b/OvmfPkg/XenOvmf.fdf
@@ -157,7 +157,7 @@ INF MdeModulePkg/Core/Pei/PeiMain.inf
INF MdeModulePkg/Universal/PCD/Pei/Pcd.inf
INF
MdeModulePkg/Universal/ReportStatusCodeRouter/Pei/ReportStatusCodeRouterPei.inf
INF MdeModulePkg/Universal/StatusCodeHandler/Pei/StatusCodeHandlerPei.inf
-INF OvmfPkg/PlatformPei/PlatformPei.inf
+INF OvmfPkg/XenPlatformPei/XenPlatformPei.inf
INF MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf
INF UefiCpuPkg/Universal/Acpi/S3Resume2Pei/S3Resume2Pei.inf
!if $(SMM_REQUIRE) == TRUE
diff --git a/OvmfPkg/XenPlatformPei/Cmos.c b/OvmfPkg/XenPlatformPei/Cmos.c
new file mode 100644
index 0000000..48ed2cb
--- /dev/null
+++ b/OvmfPkg/XenPlatformPei/Cmos.c
@@ -0,0 +1,64 @@
+/** @file
+ PC/AT CMOS access routines
+
+ Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD
License
+ which accompanies this distribution. The full text of the license may be
found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+
+#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;
+}
+
diff --git a/OvmfPkg/XenPlatformPei/Cmos.h b/OvmfPkg/XenPlatformPei/Cmos.h
new file mode 100644
index 0000000..949f884
--- /dev/null
+++ b/OvmfPkg/XenPlatformPei/Cmos.h
@@ -0,0 +1,56 @@
+/** @file
+ PC/AT CMOS access routines
+
+ Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD
License
+ which accompanies this distribution. The full text of the license may be
found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef __CMOS_H__
+#define __CMOS_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
+ );
+
+/**
+ 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
+ );
+
+
+#endif
+
diff --git a/OvmfPkg/XenPlatformPei/Fv.c b/OvmfPkg/XenPlatformPei/Fv.c
new file mode 100644
index 0000000..248c585
--- /dev/null
+++ b/OvmfPkg/XenPlatformPei/Fv.c
@@ -0,0 +1,100 @@
+/** @file
+ Build FV related hobs for platform.
+
+ Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD
License
+ which accompanies this distribution. The full text of the license may be
found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "PiPei.h"
+#include "Platform.h"
+#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
+#include <Library/PeiServicesLib.h>
+#include <Library/PcdLib.h>
+
+
+/**
+ Publish PEI & DXE (Decompressed) Memory based FVs to let PEI
+ and DXE know about them.
+
+ @retval EFI_SUCCESS Platform PEI FVs were initialized successfully.
+
+**/
+EFI_STATUS
+PeiFvInitialization (
+ VOID
+ )
+{
+ BOOLEAN SecureS3Needed;
+
+ DEBUG ((EFI_D_INFO, "Platform PEI Firmware Volume Initialization\n"));
+
+ //
+ // Create a memory allocation HOB for the PEI FV.
+ //
+ // Allocate as ACPI NVS is S3 is supported
+ //
+ BuildMemoryAllocationHob (
+ PcdGet32 (PcdOvmfPeiMemFvBase),
+ PcdGet32 (PcdOvmfPeiMemFvSize),
+ mS3Supported ? EfiACPIMemoryNVS : EfiBootServicesData
+ );
+
+ //
+ // Let DXE know about the DXE FV
+ //
+ BuildFvHob (PcdGet32 (PcdOvmfDxeMemFvBase), PcdGet32 (PcdOvmfDxeMemFvSize));
+
+ SecureS3Needed = mS3Supported && FeaturePcdGet (PcdSmmSmramRequire);
+
+ //
+ // Create a memory allocation HOB for the DXE FV.
+ //
+ // If "secure" S3 is needed, then SEC will decompress both PEI and DXE
+ // firmware volumes at S3 resume too, hence we need to keep away the OS from
+ // DXEFV as well. Otherwise we only need to keep away DXE itself from the
+ // DXEFV area.
+ //
+ BuildMemoryAllocationHob (
+ PcdGet32 (PcdOvmfDxeMemFvBase),
+ PcdGet32 (PcdOvmfDxeMemFvSize),
+ SecureS3Needed ? EfiACPIMemoryNVS : EfiBootServicesData
+ );
+
+ //
+ // Additionally, said decompression will use temporary memory above the end
+ // of DXEFV, so let's keep away the OS from there too.
+ //
+ if (SecureS3Needed) {
+ UINT32 DxeMemFvEnd;
+
+ DxeMemFvEnd = PcdGet32 (PcdOvmfDxeMemFvBase) +
+ PcdGet32 (PcdOvmfDxeMemFvSize);
+ BuildMemoryAllocationHob (
+ DxeMemFvEnd,
+ PcdGet32 (PcdOvmfDecompressionScratchEnd) - DxeMemFvEnd,
+ EfiACPIMemoryNVS
+ );
+ }
+
+ //
+ // Let PEI know about the DXE FV so it can find the DXE Core
+ //
+ PeiServicesInstallFvInfoPpi (
+ NULL,
+ (VOID *)(UINTN) PcdGet32 (PcdOvmfDxeMemFvBase),
+ PcdGet32 (PcdOvmfDxeMemFvSize),
+ NULL,
+ NULL
+ );
+
+ return EFI_SUCCESS;
+}
+
diff --git a/OvmfPkg/XenPlatformPei/MemDetect.c
b/OvmfPkg/XenPlatformPei/MemDetect.c
new file mode 100644
index 0000000..4ecdf5e
--- /dev/null
+++ b/OvmfPkg/XenPlatformPei/MemDetect.c
@@ -0,0 +1,449 @@
+/**@file
+ Memory Detection for Virtual Machines.
+
+ Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD
License
+ which accompanies this distribution. The full text of the license may be
found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+Module Name:
+
+ MemDetect.c
+
+**/
+
+//
+// The package level header files this module uses
+//
+#include <PiPei.h>
+
+//
+// The Library classes this module consumes
+//
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
+#include <Library/IoLib.h>
+#include <Library/PcdLib.h>
+#include <Library/PeimEntryPoint.h>
+#include <Library/ResourcePublicationLib.h>
+#include <Library/MtrrLib.h>
+#include <Library/QemuFwCfgLib.h>
+
+#include "Platform.h"
+#include "Cmos.h"
+
+UINT8 mPhysMemAddressWidth;
+
+STATIC UINT32 mS3AcpiReservedMemoryBase;
+STATIC UINT32 mS3AcpiReservedMemorySize;
+
+UINT32
+GetSystemMemorySizeBelow4gb (
+ VOID
+ )
+{
+ UINT8 Cmos0x34;
+ UINT8 Cmos0x35;
+
+ //
+ // CMOS 0x34/0x35 specifies the system memory above 16 MB.
+ // * CMOS(0x35) is the high byte
+ // * CMOS(0x34) is the low byte
+ // * The size is specified in 64kb chunks
+ // * Since this is memory above 16MB, the 16MB must be added
+ // into the calculation to get the total memory size.
+ //
+
+ Cmos0x34 = (UINT8) CmosRead8 (0x34);
+ Cmos0x35 = (UINT8) CmosRead8 (0x35);
+
+ return (UINT32) (((UINTN)((Cmos0x35 << 8) + Cmos0x34) << 16) + SIZE_16MB);
+}
+
+
+STATIC
+UINT64
+GetSystemMemorySizeAbove4gb (
+ )
+{
+ UINT32 Size;
+ UINTN CmosIndex;
+
+ //
+ // CMOS 0x5b-0x5d specifies the system memory above 4GB MB.
+ // * CMOS(0x5d) is the most significant size byte
+ // * CMOS(0x5c) is the middle size byte
+ // * CMOS(0x5b) is the least significant size byte
+ // * The size is specified in 64kb chunks
+ //
+
+ Size = 0;
+ for (CmosIndex = 0x5d; CmosIndex >= 0x5b; CmosIndex--) {
+ Size = (UINT32) (Size << 8) + (UINT32) CmosRead8 (CmosIndex);
+ }
+
+ return LShiftU64 (Size, 16);
+}
+
+
+/**
+ Return the highest address that DXE could possibly use, plus one.
+**/
+STATIC
+UINT64
+GetFirstNonAddress (
+ VOID
+ )
+{
+ UINT64 FirstNonAddress;
+ UINT64 Pci64Base, Pci64Size;
+ RETURN_STATUS PcdStatus;
+
+ FirstNonAddress = BASE_4GB + GetSystemMemorySizeAbove4gb ();
+
+ //
+ // If DXE is 32-bit, then we're done; PciBusDxe will degrade 64-bit MMIO
+ // resources to 32-bit anyway. See DegradeResource() in
+ // "PciResourceSupport.c".
+ //
+#ifdef MDE_CPU_IA32
+ if (!FeaturePcdGet (PcdDxeIplSwitchToLongMode)) {
+ return FirstNonAddress;
+ }
+#endif
+
+ //
+ // Otherwise, in order to calculate the highest address plus one, we must
+ // consider the 64-bit PCI host aperture too. Fetch the default size.
+ //
+ Pci64Size = PcdGet64 (PcdPciMmio64Size);
+
+ if (Pci64Size == 0) {
+ if (mBootMode != BOOT_ON_S3_RESUME) {
+ DEBUG ((EFI_D_INFO, "%a: disabling 64-bit PCI host aperture\n",
+ __FUNCTION__));
+ PcdStatus = PcdSet64S (PcdPciMmio64Size, 0);
+ ASSERT_RETURN_ERROR (PcdStatus);
+ }
+
+ //
+ // There's nothing more to do; the amount of memory above 4GB fully
+ // determines the highest address plus one. The memory hotplug area (see
+ // below) plays no role for the firmware in this case.
+ //
+ return FirstNonAddress;
+ }
+
+ //
+ // SeaBIOS aligns both boundaries of the 64-bit PCI host aperture to 1GB, so
+ // that the host can map it with 1GB hugepages. Follow suit.
+ //
+ Pci64Base = ALIGN_VALUE (FirstNonAddress, (UINT64)SIZE_1GB);
+ Pci64Size = ALIGN_VALUE (Pci64Size, (UINT64)SIZE_1GB);
+
+ //
+ // The 64-bit PCI host aperture should also be "naturally" aligned. The
+ // alignment is determined by rounding the size of the aperture down to the
+ // next smaller or equal power of two. That is, align the aperture by the
+ // largest BAR size that can fit into it.
+ //
+ Pci64Base = ALIGN_VALUE (Pci64Base, GetPowerOfTwo64 (Pci64Size));
+
+ if (mBootMode != BOOT_ON_S3_RESUME) {
+ //
+ // The core PciHostBridgeDxe driver will automatically add this range to
+ // the GCD memory space map through our PciHostBridgeLib instance; here we
+ // only need to set the PCDs.
+ //
+ PcdStatus = PcdSet64S (PcdPciMmio64Base, Pci64Base);
+ ASSERT_RETURN_ERROR (PcdStatus);
+ PcdStatus = PcdSet64S (PcdPciMmio64Size, Pci64Size);
+ ASSERT_RETURN_ERROR (PcdStatus);
+
+ DEBUG ((EFI_D_INFO, "%a: Pci64Base=0x%Lx Pci64Size=0x%Lx\n",
+ __FUNCTION__, Pci64Base, Pci64Size));
+ }
+
+ //
+ // The useful address space ends with the 64-bit PCI host aperture.
+ //
+ FirstNonAddress = Pci64Base + Pci64Size;
+ return FirstNonAddress;
+}
+
+
+/**
+ Initialize the mPhysMemAddressWidth variable, based on guest RAM size.
+**/
+VOID
+AddressWidthInitialization (
+ VOID
+ )
+{
+ UINT64 FirstNonAddress;
+
+ //
+ // As guest-physical memory size grows, the permanent PEI RAM requirements
+ // are dominated by the identity-mapping page tables built by the DXE IPL.
+ // The DXL IPL keys off of the physical address bits advertized in the CPU
+ // HOB. To conserve memory, we calculate the minimum address width here.
+ //
+ FirstNonAddress = GetFirstNonAddress ();
+ mPhysMemAddressWidth = (UINT8)HighBitSet64 (FirstNonAddress);
+
+ //
+ // If FirstNonAddress is not an integral power of two, then we need an
+ // additional bit.
+ //
+ if ((FirstNonAddress & (FirstNonAddress - 1)) != 0) {
+ ++mPhysMemAddressWidth;
+ }
+
+ //
+ // The minimum address width is 36 (covers up to and excluding 64 GB, which
+ // is the maximum for Ia32 + PAE). The theoretical architecture maximum for
+ // X64 long mode is 52 bits, but the DXE IPL clamps that down to 48 bits. We
+ // can simply assert that here, since 48 bits are good enough for 256 TB.
+ //
+ if (mPhysMemAddressWidth <= 36) {
+ mPhysMemAddressWidth = 36;
+ }
+ ASSERT (mPhysMemAddressWidth <= 48);
+}
+
+
+/**
+ Calculate the cap for the permanent PEI memory.
+**/
+STATIC
+UINT32
+GetPeiMemoryCap (
+ VOID
+ )
+{
+ BOOLEAN Page1GSupport;
+ UINT32 RegEax;
+ UINT32 RegEdx;
+ UINT32 Pml4Entries;
+ UINT32 PdpEntries;
+ UINTN TotalPages;
+
+ //
+ // If DXE is 32-bit, then just return the traditional 64 MB cap.
+ //
+#ifdef MDE_CPU_IA32
+ if (!FeaturePcdGet (PcdDxeIplSwitchToLongMode)) {
+ return SIZE_64MB;
+ }
+#endif
+
+ //
+ // Dependent on physical address width, PEI memory allocations can be
+ // dominated by the page tables built for 64-bit DXE. So we key the cap off
+ // of those. The code below is based on CreateIdentityMappingPageTables() in
+ // "MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c".
+ //
+ Page1GSupport = FALSE;
+ if (PcdGetBool (PcdUse1GPageTable)) {
+ AsmCpuid (0x80000000, &RegEax, NULL, NULL, NULL);
+ if (RegEax >= 0x80000001) {
+ AsmCpuid (0x80000001, NULL, NULL, NULL, &RegEdx);
+ if ((RegEdx & BIT26) != 0) {
+ Page1GSupport = TRUE;
+ }
+ }
+ }
+
+ if (mPhysMemAddressWidth <= 39) {
+ Pml4Entries = 1;
+ PdpEntries = 1 << (mPhysMemAddressWidth - 30);
+ ASSERT (PdpEntries <= 0x200);
+ } else {
+ Pml4Entries = 1 << (mPhysMemAddressWidth - 39);
+ ASSERT (Pml4Entries <= 0x200);
+ PdpEntries = 512;
+ }
+
+ TotalPages = Page1GSupport ? Pml4Entries + 1 :
+ (PdpEntries + 1) * Pml4Entries + 1;
+ ASSERT (TotalPages <= 0x40201);
+
+ //
+ // Add 64 MB for miscellaneous allocations. Note that for
+ // mPhysMemAddressWidth values close to 36, the cap will actually be
+ // dominated by this increment.
+ //
+ return (UINT32)(EFI_PAGES_TO_SIZE (TotalPages) + SIZE_64MB);
+}
+
+
+/**
+ Publish PEI core memory
+
+ @return EFI_SUCCESS The PEIM initialized successfully.
+
+**/
+EFI_STATUS
+PublishPeiMemory (
+ VOID
+ )
+{
+ EFI_STATUS Status;
+ EFI_PHYSICAL_ADDRESS MemoryBase;
+ UINT64 MemorySize;
+ UINT32 LowerMemorySize;
+ UINT32 PeiMemoryCap;
+
+ LowerMemorySize = GetSystemMemorySizeBelow4gb ();
+
+ //
+ // If S3 is supported, then the S3 permanent PEI memory is placed next,
+ // downwards. Its size is primarily dictated by CpuMpPei. The formula below
+ // is an approximation.
+ //
+ if (mS3Supported) {
+ mS3AcpiReservedMemorySize = SIZE_512KB +
+ PcdGet32 (PcdCpuMaxLogicalProcessorNumber) *
+ PcdGet32 (PcdCpuApStackSize);
+ mS3AcpiReservedMemoryBase = LowerMemorySize - mS3AcpiReservedMemorySize;
+ LowerMemorySize = mS3AcpiReservedMemoryBase;
+ }
+
+ if (mBootMode == BOOT_ON_S3_RESUME) {
+ MemoryBase = mS3AcpiReservedMemoryBase;
+ MemorySize = mS3AcpiReservedMemorySize;
+ } else {
+ PeiMemoryCap = GetPeiMemoryCap ();
+ DEBUG ((EFI_D_INFO, "%a: mPhysMemAddressWidth=%d PeiMemoryCap=%u KB\n",
+ __FUNCTION__, mPhysMemAddressWidth, PeiMemoryCap >> 10));
+
+ //
+ // Determine the range of memory to use during PEI
+ //
+ // Technically we could lay the permanent PEI RAM over SEC's temporary
+ // decompression and scratch buffer even if "secure S3" is needed, since
+ // their lifetimes don't overlap. However, PeiFvInitialization() will cover
+ // RAM up to PcdOvmfDecompressionScratchEnd with an EfiACPIMemoryNVS memory
+ // allocation HOB, and other allocations served from the permanent PEI RAM
+ // shouldn't overlap with that HOB.
+ //
+ MemoryBase = mS3Supported && FeaturePcdGet (PcdSmmSmramRequire) ?
+ PcdGet32 (PcdOvmfDecompressionScratchEnd) :
+ PcdGet32 (PcdOvmfDxeMemFvBase) + PcdGet32 (PcdOvmfDxeMemFvSize);
+ MemorySize = LowerMemorySize - MemoryBase;
+ if (MemorySize > PeiMemoryCap) {
+ MemoryBase = LowerMemorySize - PeiMemoryCap;
+ MemorySize = PeiMemoryCap;
+ }
+ }
+
+ //
+ // Publish this memory to the PEI Core
+ //
+ Status = PublishSystemMemory(MemoryBase, MemorySize);
+ ASSERT_EFI_ERROR (Status);
+
+ return Status;
+}
+
+
+/**
+ Publish system RAM and reserve memory regions
+
+**/
+VOID
+InitializeRamRegions (
+ VOID
+ )
+{
+ XenPublishRamRegions ();
+
+ if (mS3Supported && mBootMode != BOOT_ON_S3_RESUME) {
+ //
+ // This is the memory range that will be used for PEI on S3 resume
+ //
+ BuildMemoryAllocationHob (
+ mS3AcpiReservedMemoryBase,
+ mS3AcpiReservedMemorySize,
+ EfiACPIMemoryNVS
+ );
+
+ //
+ // Cover the initial RAM area used as stack and temporary PEI heap.
+ //
+ // This is reserved as ACPI NVS so it can be used on S3 resume.
+ //
+ BuildMemoryAllocationHob (
+ PcdGet32 (PcdOvmfSecPeiTempRamBase),
+ PcdGet32 (PcdOvmfSecPeiTempRamSize),
+ EfiACPIMemoryNVS
+ );
+
+ //
+ // SEC stores its table of GUIDed section handlers here.
+ //
+ BuildMemoryAllocationHob (
+ PcdGet64 (PcdGuidedExtractHandlerTableAddress),
+ PcdGet32 (PcdGuidedExtractHandlerTableSize),
+ EfiACPIMemoryNVS
+ );
+
+#ifdef MDE_CPU_X64
+ //
+ // Reserve the initial page tables built by the reset vector code.
+ //
+ // Since this memory range will be used by the Reset Vector on S3
+ // resume, it must be reserved as ACPI NVS.
+ //
+ BuildMemoryAllocationHob (
+ (EFI_PHYSICAL_ADDRESS)(UINTN) PcdGet32 (PcdOvmfSecPageTablesBase),
+ (UINT64)(UINTN) PcdGet32 (PcdOvmfSecPageTablesSize),
+ EfiACPIMemoryNVS
+ );
+#endif
+ }
+
+ if (mBootMode != BOOT_ON_S3_RESUME) {
+ if (!FeaturePcdGet (PcdSmmSmramRequire)) {
+ //
+ // Reserve the lock box storage area
+ //
+ // Since this memory range will be used on S3 resume, it must be
+ // reserved as ACPI NVS.
+ //
+ // If S3 is unsupported, then various drivers might still write to the
+ // LockBox area. We ought to prevent DXE from serving allocation requests
+ // such that they would overlap the LockBox storage.
+ //
+ ZeroMem (
+ (VOID*)(UINTN) PcdGet32 (PcdOvmfLockBoxStorageBase),
+ (UINTN) PcdGet32 (PcdOvmfLockBoxStorageSize)
+ );
+ BuildMemoryAllocationHob (
+ (EFI_PHYSICAL_ADDRESS)(UINTN) PcdGet32 (PcdOvmfLockBoxStorageBase),
+ (UINT64)(UINTN) PcdGet32 (PcdOvmfLockBoxStorageSize),
+ mS3Supported ? EfiACPIMemoryNVS : EfiBootServicesData
+ );
+ }
+
+ if (FeaturePcdGet (PcdSmmSmramRequire)) {
+ UINT32 TsegSize;
+
+ //
+ // Make sure the TSEG area that we reported as a reserved memory resource
+ // cannot be used for reserved memory allocations.
+ //
+ TsegSize = FixedPcdGet8 (PcdQ35TsegMbytes) * SIZE_1MB;
+ BuildMemoryAllocationHob (
+ GetSystemMemorySizeBelow4gb() - TsegSize,
+ TsegSize,
+ EfiReservedMemoryType
+ );
+ }
+ }
+}
diff --git a/OvmfPkg/XenPlatformPei/Platform.c
b/OvmfPkg/XenPlatformPei/Platform.c
new file mode 100644
index 0000000..bf78878
--- /dev/null
+++ b/OvmfPkg/XenPlatformPei/Platform.c
@@ -0,0 +1,536 @@
+/**@file
+ Platform PEI driver
+
+ Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2011, Andrei Warkentin <andreiw@xxxxxxxxxxxx>
+
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD
License
+ which accompanies this distribution. The full text of the license may be
found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+//
+// The package level header files this module uses
+//
+#include <PiPei.h>
+
+//
+// The Library classes this module consumes
+//
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
+#include <Library/IoLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/PcdLib.h>
+#include <Library/PciLib.h>
+#include <Library/PeimEntryPoint.h>
+#include <Library/PeiServicesLib.h>
+#include <Library/QemuFwCfgLib.h>
+#include <Library/ResourcePublicationLib.h>
+#include <Guid/MemoryTypeInformation.h>
+#include <Ppi/MasterBootMode.h>
+#include <IndustryStandard/Pci22.h>
+#include <OvmfPlatforms.h>
+
+#include "Platform.h"
+#include "Cmos.h"
+
+EFI_MEMORY_TYPE_INFORMATION mDefaultMemoryTypeInformation[] = {
+ { EfiACPIMemoryNVS, 0x004 },
+ { EfiACPIReclaimMemory, 0x008 },
+ { EfiReservedMemoryType, 0x004 },
+ { EfiRuntimeServicesData, 0x024 },
+ { EfiRuntimeServicesCode, 0x030 },
+ { EfiBootServicesCode, 0x180 },
+ { EfiBootServicesData, 0xF00 },
+ { EfiMaxMemoryType, 0x000 }
+};
+
+
+EFI_PEI_PPI_DESCRIPTOR mPpiBootMode[] = {
+ {
+ EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST,
+ &gEfiPeiMasterBootModePpiGuid,
+ NULL
+ }
+};
+
+
+UINT16 mHostBridgeDevId;
+
+EFI_BOOT_MODE mBootMode = BOOT_WITH_FULL_CONFIGURATION;
+
+BOOLEAN mS3Supported = FALSE;
+
+
+VOID
+AddIoMemoryBaseSizeHob (
+ EFI_PHYSICAL_ADDRESS MemoryBase,
+ UINT64 MemorySize
+ )
+{
+ BuildResourceDescriptorHob (
+ EFI_RESOURCE_MEMORY_MAPPED_IO,
+ EFI_RESOURCE_ATTRIBUTE_PRESENT |
+ EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
+ EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
+ EFI_RESOURCE_ATTRIBUTE_TESTED,
+ MemoryBase,
+ MemorySize
+ );
+}
+
+VOID
+AddReservedMemoryBaseSizeHob (
+ EFI_PHYSICAL_ADDRESS MemoryBase,
+ UINT64 MemorySize,
+ BOOLEAN Cacheable
+ )
+{
+ BuildResourceDescriptorHob (
+ EFI_RESOURCE_MEMORY_RESERVED,
+ EFI_RESOURCE_ATTRIBUTE_PRESENT |
+ EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
+ EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
+ (Cacheable ?
+ EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE |
+ EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |
+ EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE :
+ 0
+ ) |
+ EFI_RESOURCE_ATTRIBUTE_TESTED,
+ MemoryBase,
+ MemorySize
+ );
+}
+
+VOID
+AddIoMemoryRangeHob (
+ EFI_PHYSICAL_ADDRESS MemoryBase,
+ EFI_PHYSICAL_ADDRESS MemoryLimit
+ )
+{
+ AddIoMemoryBaseSizeHob (MemoryBase, (UINT64)(MemoryLimit - MemoryBase));
+}
+
+
+VOID
+AddMemoryBaseSizeHob (
+ EFI_PHYSICAL_ADDRESS MemoryBase,
+ UINT64 MemorySize
+ )
+{
+ BuildResourceDescriptorHob (
+ EFI_RESOURCE_SYSTEM_MEMORY,
+ EFI_RESOURCE_ATTRIBUTE_PRESENT |
+ EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
+ EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
+ EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE |
+ EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |
+ EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE |
+ EFI_RESOURCE_ATTRIBUTE_TESTED,
+ MemoryBase,
+ MemorySize
+ );
+}
+
+
+VOID
+AddMemoryRangeHob (
+ EFI_PHYSICAL_ADDRESS MemoryBase,
+ EFI_PHYSICAL_ADDRESS MemoryLimit
+ )
+{
+ AddMemoryBaseSizeHob (MemoryBase, (UINT64)(MemoryLimit - MemoryBase));
+}
+
+
+VOID
+MemMapInitialization (
+ VOID
+ )
+{
+ UINT64 PciIoBase;
+ UINT64 PciIoSize;
+ RETURN_STATUS PcdStatus;
+
+ PciIoBase = 0xC000;
+ PciIoSize = 0x4000;
+
+ //
+ // Create Memory Type Information HOB
+ //
+ BuildGuidDataHob (
+ &gEfiMemoryTypeInformationGuid,
+ mDefaultMemoryTypeInformation,
+ sizeof(mDefaultMemoryTypeInformation)
+ );
+
+ //
+ // Video memory + Legacy BIOS region
+ //
+ AddIoMemoryRangeHob (0x0A0000, BASE_1MB);
+
+ if (!mXen) {
+ UINT32 TopOfLowRam;
+ UINT64 PciExBarBase;
+ UINT32 PciBase;
+ UINT32 PciSize;
+
+ TopOfLowRam = GetSystemMemorySizeBelow4gb ();
+ PciExBarBase = 0;
+ if (mHostBridgeDevId == INTEL_Q35_MCH_DEVICE_ID) {
+ //
+ // The MMCONFIG area is expected to fall between the top of low RAM and
+ // the base of the 32-bit PCI host aperture.
+ //
+ PciExBarBase = FixedPcdGet64 (PcdPciExpressBaseAddress);
+ ASSERT (TopOfLowRam <= PciExBarBase);
+ ASSERT (PciExBarBase <= MAX_UINT32 - SIZE_256MB);
+ PciBase = (UINT32)(PciExBarBase + SIZE_256MB);
+ } else {
+ PciBase = (TopOfLowRam < BASE_2GB) ? BASE_2GB : TopOfLowRam;
+ }
+
+ //
+ // address purpose size
+ // ------------ -------- -------------------------
+ // max(top, 2g) PCI MMIO 0xFC000000 - max(top, 2g)
+ // 0xFC000000 gap 44 MB
+ // 0xFEC00000 IO-APIC 4 KB
+ // 0xFEC01000 gap 1020 KB
+ // 0xFED00000 HPET 1 KB
+ // 0xFED00400 gap 111 KB
+ // 0xFED1C000 gap (PIIX4) / RCRB (ICH9) 16 KB
+ // 0xFED20000 gap 896 KB
+ // 0xFEE00000 LAPIC 1 MB
+ //
+ PciSize = 0xFC000000 - PciBase;
+ AddIoMemoryBaseSizeHob (PciBase, PciSize);
+ PcdStatus = PcdSet64S (PcdPciMmio32Base, PciBase);
+ ASSERT_RETURN_ERROR (PcdStatus);
+ PcdStatus = PcdSet64S (PcdPciMmio32Size, PciSize);
+ ASSERT_RETURN_ERROR (PcdStatus);
+
+ AddIoMemoryBaseSizeHob (0xFEC00000, SIZE_4KB);
+ AddIoMemoryBaseSizeHob (0xFED00000, SIZE_1KB);
+ if (mHostBridgeDevId == INTEL_Q35_MCH_DEVICE_ID) {
+ AddIoMemoryBaseSizeHob (ICH9_ROOT_COMPLEX_BASE, SIZE_16KB);
+ //
+ // Note: there should be an
+ //
+ // AddIoMemoryBaseSizeHob (PciExBarBase, SIZE_256MB);
+ //
+ // call below, just like the one above for RCBA. However, Linux insists
+ // that the MMCONFIG area be marked in the E820 or UEFI memory map as
+ // "reserved memory" -- Linux does not content itself with a simple gap
+ // in the memory map wherever the MCFG ACPI table points to.
+ //
+ // This appears to be a safety measure. The PCI Firmware Specification
+ // (rev 3.1) says in 4.1.2. "MCFG Table Description": "The resources can
+ // *optionally* be returned in [...] EFIGetMemoryMap as reserved memory
+ // [...]". (Emphasis added here.)
+ //
+ // Normally we add memory resource descriptor HOBs in
+ // QemuInitializeRam(), and pre-allocate from those with memory
+ // allocation HOBs in InitializeRamRegions(). However, the MMCONFIG area
+ // is most definitely not RAM; so, as an exception, cover it with
+ // uncacheable reserved memory right here.
+ //
+ AddReservedMemoryBaseSizeHob (PciExBarBase, SIZE_256MB, FALSE);
+ BuildMemoryAllocationHob (PciExBarBase, SIZE_256MB,
+ EfiReservedMemoryType);
+ }
+ AddIoMemoryBaseSizeHob (PcdGet32(PcdCpuLocalApicBaseAddress), SIZE_1MB);
+
+ //
+ // On Q35, the IO Port space is available for PCI resource allocations from
+ // 0x6000 up.
+ //
+ if (mHostBridgeDevId == INTEL_Q35_MCH_DEVICE_ID) {
+ PciIoBase = 0x6000;
+ PciIoSize = 0xA000;
+ ASSERT ((ICH9_PMBASE_VALUE & 0xF000) < PciIoBase);
+ }
+ }
+
+ //
+ // Add PCI IO Port space available for PCI resource allocations.
+ //
+ BuildResourceDescriptorHob (
+ EFI_RESOURCE_IO,
+ EFI_RESOURCE_ATTRIBUTE_PRESENT |
+ EFI_RESOURCE_ATTRIBUTE_INITIALIZED,
+ PciIoBase,
+ PciIoSize
+ );
+ PcdStatus = PcdSet64S (PcdPciIoBase, PciIoBase);
+ ASSERT_RETURN_ERROR (PcdStatus);
+ PcdStatus = PcdSet64S (PcdPciIoSize, PciIoSize);
+ ASSERT_RETURN_ERROR (PcdStatus);
+}
+
+VOID
+PciExBarInitialization (
+ VOID
+ )
+{
+ union {
+ UINT64 Uint64;
+ UINT32 Uint32[2];
+ } PciExBarBase;
+
+ //
+ // We only support the 256MB size for the MMCONFIG area:
+ // 256 buses * 32 devices * 8 functions * 4096 bytes config space.
+ //
+ // The masks used below enforce the Q35 requirements that the MMCONFIG area
+ // be (a) correctly aligned -- here at 256 MB --, (b) located under 64 GB.
+ //
+ // Note that (b) also ensures that the minimum address width we have
+ // determined in AddressWidthInitialization(), i.e., 36 bits, will suffice
+ // for DXE's page tables to cover the MMCONFIG area.
+ //
+ PciExBarBase.Uint64 = FixedPcdGet64 (PcdPciExpressBaseAddress);
+ ASSERT ((PciExBarBase.Uint32[1] & MCH_PCIEXBAR_HIGHMASK) == 0);
+ ASSERT ((PciExBarBase.Uint32[0] & MCH_PCIEXBAR_LOWMASK) == 0);
+
+ //
+ // Clear the PCIEXBAREN bit first, before programming the high register.
+ //
+ PciWrite32 (DRAMC_REGISTER_Q35 (MCH_PCIEXBAR_LOW), 0);
+
+ //
+ // Program the high register. Then program the low register, setting the
+ // MMCONFIG area size and enabling decoding at once.
+ //
+ PciWrite32 (DRAMC_REGISTER_Q35 (MCH_PCIEXBAR_HIGH), PciExBarBase.Uint32[1]);
+ PciWrite32 (
+ DRAMC_REGISTER_Q35 (MCH_PCIEXBAR_LOW),
+ PciExBarBase.Uint32[0] | MCH_PCIEXBAR_BUS_FF | MCH_PCIEXBAR_EN
+ );
+}
+
+VOID
+MiscInitialization (
+ VOID
+ )
+{
+ UINTN PmCmd;
+ UINTN Pmba;
+ UINT32 PmbaAndVal;
+ UINT32 PmbaOrVal;
+ UINTN AcpiCtlReg;
+ UINT8 AcpiEnBit;
+ RETURN_STATUS PcdStatus;
+
+ //
+ // Disable A20 Mask
+ //
+ IoOr8 (0x92, BIT1);
+
+ //
+ // Build the CPU HOB with guest RAM size dependent address width and 16-bits
+ // of IO space. (Side note: unlike other HOBs, the CPU HOB is needed during
+ // S3 resume as well, so we build it unconditionally.)
+ //
+ BuildCpuHob (mPhysMemAddressWidth, 16);
+
+ //
+ // Determine platform type and save Host Bridge DID to PCD
+ //
+ switch (mHostBridgeDevId) {
+ case INTEL_82441_DEVICE_ID:
+ PmCmd = POWER_MGMT_REGISTER_PIIX4 (PCI_COMMAND_OFFSET);
+ Pmba = POWER_MGMT_REGISTER_PIIX4 (PIIX4_PMBA);
+ PmbaAndVal = ~(UINT32)PIIX4_PMBA_MASK;
+ PmbaOrVal = PIIX4_PMBA_VALUE;
+ AcpiCtlReg = POWER_MGMT_REGISTER_PIIX4 (PIIX4_PMREGMISC);
+ AcpiEnBit = PIIX4_PMREGMISC_PMIOSE;
+ break;
+ case INTEL_Q35_MCH_DEVICE_ID:
+ PmCmd = POWER_MGMT_REGISTER_Q35 (PCI_COMMAND_OFFSET);
+ Pmba = POWER_MGMT_REGISTER_Q35 (ICH9_PMBASE);
+ PmbaAndVal = ~(UINT32)ICH9_PMBASE_MASK;
+ PmbaOrVal = ICH9_PMBASE_VALUE;
+ AcpiCtlReg = POWER_MGMT_REGISTER_Q35 (ICH9_ACPI_CNTL);
+ AcpiEnBit = ICH9_ACPI_CNTL_ACPI_EN;
+ break;
+ default:
+ DEBUG ((EFI_D_ERROR, "%a: Unknown Host Bridge Device ID: 0x%04x\n",
+ __FUNCTION__, mHostBridgeDevId));
+ ASSERT (FALSE);
+ return;
+ }
+ PcdStatus = PcdSet16S (PcdOvmfHostBridgePciDevId, mHostBridgeDevId);
+ ASSERT_RETURN_ERROR (PcdStatus);
+
+ //
+ // If the appropriate IOspace enable bit is set, assume the ACPI PMBA
+ // has been configured (e.g., by Xen) and skip the setup here.
+ // This matches the logic in AcpiTimerLibConstructor ().
+ //
+ if ((PciRead8 (AcpiCtlReg) & AcpiEnBit) == 0) {
+ //
+ // The PEI phase should be exited with fully accessibe ACPI PM IO space:
+ // 1. set PMBA
+ //
+ PciAndThenOr32 (Pmba, PmbaAndVal, PmbaOrVal);
+
+ //
+ // 2. set PCICMD/IOSE
+ //
+ PciOr8 (PmCmd, EFI_PCI_COMMAND_IO_SPACE);
+
+ //
+ // 3. set ACPI PM IO enable bit (PMREGMISC:PMIOSE or ACPI_CNTL:ACPI_EN)
+ //
+ PciOr8 (AcpiCtlReg, AcpiEnBit);
+ }
+
+ if (mHostBridgeDevId == INTEL_Q35_MCH_DEVICE_ID) {
+ //
+ // Set Root Complex Register Block BAR
+ //
+ PciWrite32 (
+ POWER_MGMT_REGISTER_Q35 (ICH9_RCBA),
+ ICH9_ROOT_COMPLEX_BASE | ICH9_RCBA_EN
+ );
+
+ //
+ // Set PCI Express Register Range Base Address
+ //
+ PciExBarInitialization ();
+ }
+}
+
+
+VOID
+BootModeInitialization (
+ VOID
+ )
+{
+ EFI_STATUS Status;
+
+ if (CmosRead8 (0xF) == 0xFE) {
+ mBootMode = BOOT_ON_S3_RESUME;
+ }
+ CmosWrite8 (0xF, 0x00);
+
+ Status = PeiServicesSetBootMode (mBootMode);
+ ASSERT_EFI_ERROR (Status);
+
+ Status = PeiServicesInstallPpi (mPpiBootMode);
+ ASSERT_EFI_ERROR (Status);
+}
+
+
+VOID
+ReserveEmuVariableNvStore (
+ )
+{
+ EFI_PHYSICAL_ADDRESS VariableStore;
+ RETURN_STATUS PcdStatus;
+
+ //
+ // Allocate storage for NV variables early on so it will be
+ // at a consistent address. Since VM memory is preserved
+ // across reboots, this allows the NV variable storage to survive
+ // a VM reboot.
+ //
+ VariableStore =
+ (EFI_PHYSICAL_ADDRESS)(UINTN)
+ AllocateAlignedRuntimePages (
+ EFI_SIZE_TO_PAGES (2 * PcdGet32 (PcdFlashNvStorageFtwSpareSize)),
+ PcdGet32 (PcdFlashNvStorageFtwSpareSize)
+ );
+ DEBUG ((EFI_D_INFO,
+ "Reserved variable store memory: 0x%lX; size: %dkb\n",
+ VariableStore,
+ (2 * PcdGet32 (PcdFlashNvStorageFtwSpareSize)) / 1024
+ ));
+ PcdStatus = PcdSet64S (PcdEmuVariableNvStoreReserved, VariableStore);
+ ASSERT_RETURN_ERROR (PcdStatus);
+}
+
+
+VOID
+DebugDumpCmos (
+ VOID
+ )
+{
+ UINT32 Loop;
+
+ DEBUG ((EFI_D_INFO, "CMOS:\n"));
+
+ for (Loop = 0; Loop < 0x80; Loop++) {
+ if ((Loop % 0x10) == 0) {
+ DEBUG ((EFI_D_INFO, "%02x:", Loop));
+ }
+ DEBUG ((EFI_D_INFO, " %02x", CmosRead8 (Loop)));
+ if ((Loop % 0x10) == 0xf) {
+ DEBUG ((EFI_D_INFO, "\n"));
+ }
+ }
+}
+
+
+
+/**
+ Perform Platform PEI initialization.
+
+ @param FileHandle Handle of the file being invoked.
+ @param PeiServices Describes the list of possible PEI Services.
+
+ @return EFI_SUCCESS The PEIM initialized successfully.
+
+**/
+EFI_STATUS
+EFIAPI
+InitializeXenPlatform (
+ IN EFI_PEI_FILE_HANDLE FileHandle,
+ IN CONST EFI_PEI_SERVICES **PeiServices
+ )
+{
+ DEBUG ((EFI_D_ERROR, "Platform PEIM Loaded\n"));
+
+ DebugDumpCmos ();
+
+ XenDetect ();
+
+ BootModeInitialization ();
+ AddressWidthInitialization ();
+
+ PublishPeiMemory ();
+
+ InitializeRamRegions ();
+
+ if (mXen) {
+ DEBUG ((EFI_D_INFO, "Xen was detected\n"));
+ InitializeXen ();
+ } else {
+ DEBUG ((EFI_D_ERROR, "not running on Xen\n"));
+ CpuDeadLoop ();
+ }
+
+ //
+ // Query Host Bridge DID
+ //
+ mHostBridgeDevId = PciRead16 (OVMF_HOSTBRIDGE_DID);
+
+ if (mBootMode != BOOT_ON_S3_RESUME) {
+ ReserveEmuVariableNvStore ();
+ PeiFvInitialization ();
+ MemMapInitialization ();
+ }
+
+ MiscInitialization ();
+
+ return EFI_SUCCESS;
+}
diff --git a/OvmfPkg/XenPlatformPei/Platform.h
b/OvmfPkg/XenPlatformPei/Platform.h
new file mode 100644
index 0000000..eda765b
--- /dev/null
+++ b/OvmfPkg/XenPlatformPei/Platform.h
@@ -0,0 +1,104 @@
+/** @file
+ Platform PEI module include file.
+
+ Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD
License
+ which accompanies this distribution. The full text of the license may be
found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef _PLATFORM_PEI_H_INCLUDED_
+#define _PLATFORM_PEI_H_INCLUDED_
+
+#include <IndustryStandard/E820.h>
+
+VOID
+AddIoMemoryBaseSizeHob (
+ EFI_PHYSICAL_ADDRESS MemoryBase,
+ UINT64 MemorySize
+ );
+
+VOID
+AddIoMemoryRangeHob (
+ EFI_PHYSICAL_ADDRESS MemoryBase,
+ EFI_PHYSICAL_ADDRESS MemoryLimit
+ );
+
+VOID
+AddMemoryBaseSizeHob (
+ EFI_PHYSICAL_ADDRESS MemoryBase,
+ UINT64 MemorySize
+ );
+
+VOID
+AddMemoryRangeHob (
+ EFI_PHYSICAL_ADDRESS MemoryBase,
+ EFI_PHYSICAL_ADDRESS MemoryLimit
+ );
+
+VOID
+AddReservedMemoryBaseSizeHob (
+ EFI_PHYSICAL_ADDRESS MemoryBase,
+ UINT64 MemorySize,
+ BOOLEAN Cacheable
+ );
+
+VOID
+AddressWidthInitialization (
+ VOID
+ );
+
+EFI_STATUS
+PublishPeiMemory (
+ VOID
+ );
+
+UINT32
+GetSystemMemorySizeBelow4gb (
+ VOID
+ );
+
+VOID
+InitializeRamRegions (
+ VOID
+ );
+
+EFI_STATUS
+PeiFvInitialization (
+ VOID
+ );
+
+VOID
+InstallFeatureControlCallback (
+ VOID
+ );
+
+EFI_STATUS
+InitializeXen (
+ VOID
+ );
+
+BOOLEAN
+XenDetect (
+ VOID
+ );
+
+extern BOOLEAN mXen;
+
+VOID
+XenPublishRamRegions (
+ VOID
+ );
+
+extern EFI_BOOT_MODE mBootMode;
+
+extern BOOLEAN mS3Supported;
+
+extern UINT8 mPhysMemAddressWidth;
+
+#endif // _PLATFORM_PEI_H_INCLUDED_
diff --git a/OvmfPkg/XenPlatformPei/Xen.c b/OvmfPkg/XenPlatformPei/Xen.c
new file mode 100644
index 0000000..ab38f97
--- /dev/null
+++ b/OvmfPkg/XenPlatformPei/Xen.c
@@ -0,0 +1,231 @@
+/**@file
+ Xen Platform PEI support
+
+ Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2011, Andrei Warkentin <andreiw@xxxxxxxxxxxx>
+
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD
License
+ which accompanies this distribution. The full text of the license may be
found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+//
+// The package level header files this module uses
+//
+#include <PiPei.h>
+
+//
+// The Library classes this module consumes
+//
+#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/PcdLib.h>
+#include <Guid/XenInfo.h>
+#include <IndustryStandard/E820.h>
+#include <Library/ResourcePublicationLib.h>
+#include <Library/MtrrLib.h>
+
+#include "Platform.h"
+#include "Xen.h"
+
+BOOLEAN mXen = FALSE;
+
+STATIC UINT32 mXenLeaf = 0;
+
+EFI_XEN_INFO mXenInfo;
+
+/**
+ Returns E820 map provided by Xen
+
+ @param Entries Pointer to E820 map
+ @param Count Number of entries
+
+ @return EFI_STATUS
+**/
+EFI_STATUS
+XenGetE820Map (
+ EFI_E820_ENTRY64 **Entries,
+ UINT32 *Count
+ )
+{
+ EFI_XEN_OVMF_INFO *Info =
+ (EFI_XEN_OVMF_INFO *)(UINTN) OVMF_INFO_PHYSICAL_ADDRESS;
+
+ if (AsciiStrCmp ((CHAR8 *) Info->Signature, "XenHVMOVMF")) {
+ return EFI_NOT_FOUND;
+ }
+
+ ASSERT (Info->E820 < MAX_ADDRESS);
+ *Entries = (EFI_E820_ENTRY64 *)(UINTN) Info->E820;
+ *Count = Info->E820EntriesCount;
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Connects to the Hypervisor.
+
+ @param XenLeaf CPUID index used to connect.
+
+ @return EFI_STATUS
+
+**/
+EFI_STATUS
+XenConnect (
+ UINT32 XenLeaf
+ )
+{
+ UINT32 Index;
+ UINT32 TransferReg;
+ UINT32 TransferPages;
+ UINT32 XenVersion;
+
+ AsmCpuid (XenLeaf + 2, &TransferPages, &TransferReg, NULL, NULL);
+ mXenInfo.HyperPages = AllocatePages (TransferPages);
+ if (!mXenInfo.HyperPages) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ for (Index = 0; Index < TransferPages; Index++) {
+ AsmWriteMsr64 (TransferReg,
+ (UINTN) mXenInfo.HyperPages +
+ (Index << EFI_PAGE_SHIFT) + Index);
+ }
+
+ AsmCpuid (XenLeaf + 1, &XenVersion, NULL, NULL, NULL);
+ DEBUG ((EFI_D_ERROR, "Detected Xen version %d.%d\n",
+ XenVersion >> 16, XenVersion & 0xFFFF));
+ mXenInfo.VersionMajor = (UINT16)(XenVersion >> 16);
+ mXenInfo.VersionMinor = (UINT16)(XenVersion & 0xFFFF);
+
+ /* TBD: Locate hvm_info and reserve it away. */
+ mXenInfo.HvmInfo = NULL;
+
+ BuildGuidDataHob (
+ &gEfiXenInfoGuid,
+ &mXenInfo,
+ sizeof(mXenInfo)
+ );
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Figures out if we are running inside Xen HVM.
+
+ @retval TRUE Xen was detected
+ @retval FALSE Xen was not detected
+
+**/
+BOOLEAN
+XenDetect (
+ VOID
+ )
+{
+ UINT8 Signature[13];
+
+ if (mXenLeaf != 0) {
+ return TRUE;
+ }
+
+ Signature[12] = '\0';
+ for (mXenLeaf = 0x40000000; mXenLeaf < 0x40010000; mXenLeaf += 0x100) {
+ AsmCpuid (mXenLeaf,
+ NULL,
+ (UINT32 *) &Signature[0],
+ (UINT32 *) &Signature[4],
+ (UINT32 *) &Signature[8]);
+
+ if (!AsciiStrCmp ((CHAR8 *) Signature, "XenVMMXenVMM")) {
+ mXen = TRUE;
+ return TRUE;
+ }
+ }
+
+ mXenLeaf = 0;
+ return FALSE;
+}
+
+
+VOID
+XenPublishRamRegions (
+ VOID
+ )
+{
+ EFI_E820_ENTRY64 *E820Map;
+ UINT32 E820EntriesCount;
+ EFI_STATUS Status;
+
+ if (!mXen) {
+ return;
+ }
+
+ DEBUG ((EFI_D_INFO, "Using memory map provided by Xen\n"));
+
+ //
+ // Parse RAM in E820 map
+ //
+ E820EntriesCount = 0;
+ Status = XenGetE820Map (&E820Map, &E820EntriesCount);
+
+ ASSERT_EFI_ERROR (Status);
+
+ if (E820EntriesCount > 0) {
+ EFI_E820_ENTRY64 *Entry;
+ UINT32 Loop;
+
+ for (Loop = 0; Loop < E820EntriesCount; Loop++) {
+ Entry = E820Map + Loop;
+
+ //
+ // Only care about RAM
+ //
+ if (Entry->Type != EfiAcpiAddressRangeMemory) {
+ continue;
+ }
+
+ AddMemoryBaseSizeHob (Entry->BaseAddr, Entry->Length);
+
+ MtrrSetMemoryAttribute (Entry->BaseAddr, Entry->Length, CacheWriteBack);
+ }
+ }
+}
+
+
+/**
+ Perform Xen PEI initialization.
+
+ @return EFI_SUCCESS Xen initialized successfully
+ @return EFI_NOT_FOUND Not running under Xen
+
+**/
+EFI_STATUS
+InitializeXen (
+ VOID
+ )
+{
+ RETURN_STATUS PcdStatus;
+
+ if (mXenLeaf == 0) {
+ return EFI_NOT_FOUND;
+ }
+
+ XenConnect (mXenLeaf);
+
+ //
+ // Reserve away HVMLOADER reserved memory [0xFC000000,0xFD000000).
+ // This needs to match HVMLOADER RESERVED_MEMBASE/RESERVED_MEMSIZE.
+ //
+ AddReservedMemoryBaseSizeHob (0xFC000000, 0x1000000, FALSE);
+
+ PcdStatus = PcdSetBoolS (PcdPciDisableBusEnumeration, TRUE);
+ ASSERT_RETURN_ERROR (PcdStatus);
+
+ return EFI_SUCCESS;
+}
diff --git a/OvmfPkg/XenPlatformPei/Xen.h b/OvmfPkg/XenPlatformPei/Xen.h
new file mode 100644
index 0000000..2a8a32b
--- /dev/null
+++ b/OvmfPkg/XenPlatformPei/Xen.h
@@ -0,0 +1,45 @@
+/** @file
+ Ovmf info structure passed by Xen
+
+Copyright (c) 2013, Citrix Systems UK Ltd.<BR>
+
+This program and the accompanying materials are licensed and made available
under
+the terms and conditions of the BSD License that accompanies this distribution.
+The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php.
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef __XEN_H__
+#define __XEN_H__
+
+#include <PiPei.h>
+
+// Physical address of OVMF info
+#define OVMF_INFO_PHYSICAL_ADDRESS 0x00001000
+
+// This structure must match the definition on Xen side
+#pragma pack(1)
+typedef struct {
+ CHAR8 Signature[14]; // XenHVMOVMF\0
+ UINT8 Length; // Length of this structure
+ UINT8 Checksum; // Set such that the sum over bytes 0..length == 0
+ //
+ // Physical address of an array of TablesCount elements.
+ //
+ // Each element contains the physical address of a BIOS table.
+ //
+ EFI_PHYSICAL_ADDRESS Tables;
+ UINT32 TablesCount;
+ //
+ // Physical address of the E820 table, contains E820EntriesCount entries.
+ //
+ EFI_PHYSICAL_ADDRESS E820;
+ UINT32 E820EntriesCount;
+} EFI_XEN_OVMF_INFO;
+#pragma pack()
+
+#endif /* __XEN_H__ */
diff --git a/OvmfPkg/XenPlatformPei/XenPlatformPei.inf
b/OvmfPkg/XenPlatformPei/XenPlatformPei.inf
new file mode 100644
index 0000000..dfa7d85
--- /dev/null
+++ b/OvmfPkg/XenPlatformPei/XenPlatformPei.inf
@@ -0,0 +1,110 @@
+## @file
+# Platform PEI driver
+#
+# This module provides platform specific function to detect boot mode.
+# Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
+#
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD
License
+# which accompanies this distribution. The full text of the license may be
found at
+# http://opensource.org/licenses/bsd-license.php
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR
IMPLIED.
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = XenPlatformPei
+ FILE_GUID = f112a6ee-993a-4f0b-8295-e52029d9b4ba
+ MODULE_TYPE = PEIM
+ VERSION_STRING = 1.0
+ ENTRY_POINT = InitializeXenPlatform
+
+#
+# The following information is for reference only and not required by the
build tools.
+#
+# VALID_ARCHITECTURES = IA32 X64 IPF EBC
+#
+
+[Sources]
+ Cmos.c
+ Fv.c
+ MemDetect.c
+ Platform.c
+ Xen.c
+
+[Packages]
+ IntelFrameworkModulePkg/IntelFrameworkModulePkg.dec
+ MdePkg/MdePkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ UefiCpuPkg/UefiCpuPkg.dec
+ OvmfPkg/OvmfPkg.dec
+
+[Guids]
+ gEfiMemoryTypeInformationGuid
+ gEfiXenInfoGuid
+
+[LibraryClasses]
+ BaseLib
+ DebugLib
+ HobLib
+ IoLib
+ PciLib
+ PeiResourcePublicationLib
+ PeiServicesLib
+ PeiServicesTablePointerLib
+ PeimEntryPoint
+ MtrrLib
+ PcdLib
+
+[Pcd]
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfPeiMemFvBase
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfPeiMemFvSize
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDxeMemFvBase
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDxeMemFvSize
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPeiTempRamBase
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPeiTempRamSize
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPageTablesBase
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPageTablesSize
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfLockBoxStorageBase
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfLockBoxStorageSize
+ gUefiOvmfPkgTokenSpaceGuid.PcdGuidedExtractHandlerTableSize
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfHostBridgePciDevId
+ gUefiOvmfPkgTokenSpaceGuid.PcdPciIoBase
+ gUefiOvmfPkgTokenSpaceGuid.PcdPciIoSize
+ gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio32Base
+ gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio32Size
+ gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio64Base
+ gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio64Size
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDecompressionScratchEnd
+ gUefiOvmfPkgTokenSpaceGuid.PcdQ35TsegMbytes
+ gEfiMdePkgTokenSpaceGuid.PcdGuidedExtractHandlerTableAddress
+ gEfiMdeModulePkgTokenSpaceGuid.PcdVariableStoreSize
+ gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareSize
+ gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableSize
+ gEfiMdeModulePkgTokenSpaceGuid.PcdEmuVariableNvStoreReserved
+ gEfiMdeModulePkgTokenSpaceGuid.PcdPciDisableBusEnumeration
+ gEfiMdeModulePkgTokenSpaceGuid.PcdDxeIplSwitchToLongMode
+ gEfiMdeModulePkgTokenSpaceGuid.PcdUse1GPageTable
+ gEfiMdeModulePkgTokenSpaceGuid.PcdSetNxForStack
+ gEfiMdeModulePkgTokenSpaceGuid.PcdPropertiesTableEnable
+ gEfiMdeModulePkgTokenSpaceGuid.PcdAcpiS3Enable
+ gUefiCpuPkgTokenSpaceGuid.PcdCpuLocalApicBaseAddress
+ gUefiCpuPkgTokenSpaceGuid.PcdCpuMaxLogicalProcessorNumber
+ gUefiCpuPkgTokenSpaceGuid.PcdCpuApStackSize
+
+[FixedPcd]
+ gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress
+
+[FeaturePcd]
+ gUefiOvmfPkgTokenSpaceGuid.PcdSmmSmramRequire
+
+[Ppis]
+ gEfiPeiMasterBootModePpiGuid
+ gEfiPeiMpServicesPpiGuid
+
+[Depex]
+ TRUE
+
--
Anthony PERARD
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