---
OvmfPkg/OvmfPkg.dec | 8 ++
.../NorFlashQemuLib/NorFlashQemuLib.inf | 40 ++++++
.../NorFlashQemuUnifiedLib.inf | 30 ++++
OvmfPkg/Include/Library/NorFlashPlatformLib.h | 30 ++++
.../Library/NorFlashQemuLib/NorFlashQemuLib.c | 136 ++++++++++++++++++
.../NorFlashQemuLib/NorFlashQemuUnifiedLib.c | 40 ++++++
6 files changed, 284 insertions(+)
create mode 100644 OvmfPkg/Library/NorFlashQemuLib/NorFlashQemuLib.inf
create mode 100644 OvmfPkg/Library/NorFlashQemuLib/NorFlashQemuUnifiedLib.inf
create mode 100644 OvmfPkg/Include/Library/NorFlashPlatformLib.h
create mode 100644 OvmfPkg/Library/NorFlashQemuLib/NorFlashQemuLib.c
create mode 100644 OvmfPkg/Library/NorFlashQemuLib/NorFlashQemuUnifiedLib.c
diff --git a/OvmfPkg/OvmfPkg.dec b/OvmfPkg/OvmfPkg.dec
index 7d2acc5ea0e0..0697c91c6836 100644
--- a/OvmfPkg/OvmfPkg.dec
+++ b/OvmfPkg/OvmfPkg.dec
@@ -129,6 +129,10 @@ [LibraryClasses]
#
HardwareInfoLib|Include/Library/HardwareInfoLib.h
+ ## @libraryclass NorFlashQemuLib
+ #
+ NorFlashPlatformLib|Include/Library/NorFlashPlatformLib.h
+
[Guids]
gUefiOvmfPkgTokenSpaceGuid = {0x93bb96af, 0xb9f2, 0x4eb8, {0x94,
0x62, 0xe0, 0xba, 0x74, 0x56, 0x42, 0x36}}
gEfiXenInfoGuid = {0xd3b46f3b, 0xd441, 0x1244, {0x9a,
0x12, 0x0, 0x12, 0x27, 0x3f, 0xc1, 0x4d}}
@@ -405,6 +409,10 @@ [PcdsFixedAtBuild]
# check to decide whether to abort dispatch of the driver it is linked
into.
gUefiOvmfPkgTokenSpaceGuid.PcdEntryPointOverrideFwCfgVarName|""|VOID*|0x68
+ ## The base address and size of the FVMAIN
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFvBaseAddress|0|UINT64|0x71
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFvSize|0|UINT32|0x72
+
[PcdsDynamic, PcdsDynamicEx]
gUefiOvmfPkgTokenSpaceGuid.PcdEmuVariableEvent|0|UINT64|2
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFlashVariablesEnable|FALSE|BOOLEAN|0x10
diff --git a/OvmfPkg/Library/NorFlashQemuLib/NorFlashQemuLib.inf
b/OvmfPkg/Library/NorFlashQemuLib/NorFlashQemuLib.inf
new file mode 100644
index 000000000000..ecd8059b3508
--- /dev/null
+++ b/OvmfPkg/Library/NorFlashQemuLib/NorFlashQemuLib.inf
@@ -0,0 +1,40 @@
+#/** @file
+#
+# Component description file for NorFlashQemuLib module
+#
+# Copyright (c) 2014, Linaro Ltd. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#**/
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = NorFlashQemuLib
+ FILE_GUID = 42C30D8E-BFAD-4E77-9041-E7DAAE88DF7A
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = NorFlashPlatformLib
+
+[Sources.common]
+ NorFlashQemuLib.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ OvmfPkg/OvmfPkg.dec
+ EmbeddedPkg/EmbeddedPkg.dec
+
+[LibraryClasses]
+ BaseLib
+ DebugLib
+ UefiBootServicesTableLib
+
+[Protocols]
+ gFdtClientProtocolGuid ## CONSUMES
+
+[Depex]
+ gFdtClientProtocolGuid
+
+[Pcd]
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFvBaseAddress
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFvSize
diff --git a/OvmfPkg/Library/NorFlashQemuLib/NorFlashQemuUnifiedLib.inf
b/OvmfPkg/Library/NorFlashQemuLib/NorFlashQemuUnifiedLib.inf
new file mode 100644
index 000000000000..91d1406fc3e7
--- /dev/null
+++ b/OvmfPkg/Library/NorFlashQemuLib/NorFlashQemuUnifiedLib.inf
@@ -0,0 +1,30 @@
+#/** @file
+#
+# Component description file for NorFlashQemuLib module
+#
+# Copyright (c) 2014, Linaro Ltd. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#**/
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = NorFlashQemuUnifiedLib
+ FILE_GUID = 064742F1-E531-4D7D-A154-22315889CC23
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = NorFlashPlatformLib
+
+[Sources.common]
+ NorFlashQemuUnifiedLib.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ OvmfPkg/OvmfPkg.dec
+
+[Pcd]
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFdBaseAddress
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFirmwareFdSize
+ gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase
diff --git a/OvmfPkg/Include/Library/NorFlashPlatformLib.h
b/OvmfPkg/Include/Library/NorFlashPlatformLib.h
new file mode 100644
index 000000000000..6ef5b70e9948
--- /dev/null
+++ b/OvmfPkg/Include/Library/NorFlashPlatformLib.h
@@ -0,0 +1,30 @@
+/** @file
+
+ Copyright (c) 2011-2012, ARM Ltd. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+ **/
+
+#ifndef _NORFLASHPLATFORMLIB_H_
+#define _NORFLASHPLATFORMLIB_H_
+
+typedef struct {
+ UINTN DeviceBaseAddress; // Start address of the Device Base
Address (DBA)
+ UINTN RegionBaseAddress; // Start address of one single region
+ UINTN Size;
+ UINTN BlockSize;
+} NOR_FLASH_DESCRIPTION;
+
+EFI_STATUS
+NorFlashPlatformInitialization (
+ VOID
+ );
+
+EFI_STATUS
+NorFlashPlatformGetDevices (
+ OUT NOR_FLASH_DESCRIPTION **NorFlashDescriptions,
+ OUT UINT32 *Count
+ );
+
+#endif /* _NORFLASHPLATFORMLIB_H_ */
diff --git a/OvmfPkg/Library/NorFlashQemuLib/NorFlashQemuLib.c
b/OvmfPkg/Library/NorFlashQemuLib/NorFlashQemuLib.c
new file mode 100644
index 000000000000..3632fa9e7a98
--- /dev/null
+++ b/OvmfPkg/Library/NorFlashQemuLib/NorFlashQemuLib.c
@@ -0,0 +1,136 @@
+/** @file
+
+ Copyright (c) 2014-2018, Linaro Ltd. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+ **/
+
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/NorFlashPlatformLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+
+#include <Protocol/FdtClient.h>
+
+#define QEMU_NOR_BLOCK_SIZE SIZE_256KB
+
+#define MAX_FLASH_BANKS 4
+
+EFI_STATUS
+NorFlashPlatformInitialization (
+ VOID
+ )
+{
+ return EFI_SUCCESS;
+}
+
+NOR_FLASH_DESCRIPTION mNorFlashDevices[MAX_FLASH_BANKS];
+
+EFI_STATUS
+NorFlashPlatformGetDevices (
+ OUT NOR_FLASH_DESCRIPTION **NorFlashDescriptions,
+ OUT UINT32 *Count
+ )
+{
+ FDT_CLIENT_PROTOCOL *FdtClient;
+ INT32 Node;
+ EFI_STATUS Status;
+ EFI_STATUS FindNodeStatus;
+ CONST UINT32 *Reg;
+ UINT32 PropSize;
+ UINT32 Num;
+ UINT64 Base;
+ UINT64 Size;
+
+ Status = gBS->LocateProtocol (
+ &gFdtClientProtocolGuid,
+ NULL,
+ (VOID **)&FdtClient
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ Num = 0;
+ for (FindNodeStatus = FdtClient->FindCompatibleNode (
+ FdtClient,
+ "cfi-flash",
+ &Node
+ );
+ !EFI_ERROR (FindNodeStatus) && Num < MAX_FLASH_BANKS;
+ FindNodeStatus = FdtClient->FindNextCompatibleNode (
+ FdtClient,
+ "cfi-flash",
+ Node,
+ &Node
+ ))
+ {
+ Status = FdtClient->GetNodeProperty (
+ FdtClient,
+ Node,
+ "reg",
+ (CONST VOID **)&Reg,
+ &PropSize
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((
+ DEBUG_ERROR,
+ "%a: GetNodeProperty () failed (Status == %r)\n",
+ __FUNCTION__,
+ Status
+ ));
+ continue;
+ }
+
+ ASSERT ((PropSize % (4 * sizeof (UINT32))) == 0);
+
+ while (PropSize >= (4 * sizeof (UINT32)) && Num < MAX_FLASH_BANKS) {
+ Base = SwapBytes64 (ReadUnaligned64 ((VOID *)&Reg[0]));
+ Size = SwapBytes64 (ReadUnaligned64 ((VOID *)&Reg[2]));
+ Reg += 4;
+
+ PropSize -= 4 * sizeof (UINT32);
+
+ //
+ // Disregard any flash devices that overlap with the primary FV.
+ // The firmware is not updatable from inside the guest anyway.
+ //
+ if ((PcdGet64 (PcdOvmfFvBaseAddress) + PcdGet32 (PcdOvmfFvSize) > Base)
&&
+ ((Base + Size) > PcdGet64 (PcdOvmfFvBaseAddress)))
+ {
+ continue;
+ }
+
+ mNorFlashDevices[Num].DeviceBaseAddress = (UINTN)Base;
+ mNorFlashDevices[Num].RegionBaseAddress = (UINTN)Base;
+ mNorFlashDevices[Num].Size = (UINTN)Size;
+ mNorFlashDevices[Num].BlockSize = QEMU_NOR_BLOCK_SIZE;
+ Num++;
+ }
+
+ //
+ // UEFI takes ownership of the NOR flash, and exposes its functionality
+ // through the UEFI Runtime Services GetVariable, SetVariable, etc. This
+ // means we need to disable it in the device tree to prevent the OS from
+ // attaching its device driver as well.
+ // Note that this also hides other flash banks, but the only other flash
+ // bank we expect to encounter is the one that carries the UEFI executable
+ // code, which is not intended to be guest updatable, and is usually backed
+ // in a readonly manner by QEMU anyway.
+ //
+ Status = FdtClient->SetNodeProperty (
+ FdtClient,
+ Node,
+ "status",
+ "disabled",
+ sizeof ("disabled")
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_WARN, "Failed to set NOR flash status to 'disabled'\n"));
+ }
+ }
+
+ *NorFlashDescriptions = mNorFlashDevices;
+ *Count = Num;
+
+ return EFI_SUCCESS;
+}
diff --git a/OvmfPkg/Library/NorFlashQemuLib/NorFlashQemuUnifiedLib.c
b/OvmfPkg/Library/NorFlashQemuLib/NorFlashQemuUnifiedLib.c
new file mode 100644
index 000000000000..1420fb5b596c
--- /dev/null
+++ b/OvmfPkg/Library/NorFlashQemuLib/NorFlashQemuUnifiedLib.c
@@ -0,0 +1,40 @@
+/** @file
+
+ Copyright (c) 2019, Linaro Ltd. All rights reserved
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+ **/
+
+#include <Base.h>
+#include <PiDxe.h>
+#include <Library/NorFlashPlatformLib.h>
+
+#define QEMU_NOR_BLOCK_SIZE SIZE_256KB
+
+EFI_STATUS
+NorFlashPlatformInitialization (
+ VOID
+ )
+{
+ return EFI_SUCCESS;
+}
+
+NOR_FLASH_DESCRIPTION mNorFlashDevice =
+{
+ FixedPcdGet32 (PcdOvmfFdBaseAddress),
+ FixedPcdGet64 (PcdFlashNvStorageVariableBase),
+ FixedPcdGet32 (PcdOvmfFirmwareFdSize),
+ QEMU_NOR_BLOCK_SIZE
+};
+
+EFI_STATUS
+NorFlashPlatformGetDevices (
+ OUT NOR_FLASH_DESCRIPTION **NorFlashDescriptions,
+ OUT UINT32 *Count
+ )
+{
+ *NorFlashDescriptions = &mNorFlashDevice;
+ *Count = 1;
+ return EFI_SUCCESS;
+}
--
2.25.1
