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| author | Laszlo Ersek <lersek@redhat.com> | 2017-02-22 02:40:32 +0100 |
|---|---|---|
| committer | Laszlo Ersek <lersek@redhat.com> | 2017-03-14 21:49:11 +0100 |
| commit | 5e4d5b108799258e3cbf47bbc9744306855696df (patch) | |
| tree | 9771be5525bf5bba4f2adee896cda964fa283746 /OvmfPkg/Library/QemuFwCfgS3Lib | |
| parent | ad223a1c542217e2a9d06548dd596405e68e2a0b (diff) | |
| download | edk2-5e4d5b108799258e3cbf47bbc9744306855696df.tar.gz edk2-5e4d5b108799258e3cbf47bbc9744306855696df.tar.bz2 edk2-5e4d5b108799258e3cbf47bbc9744306855696df.zip | |
OvmfPkg/QemuFwCfgS3Lib: add initial PEI and DXE fw_cfg library instances
This patch introduces PeiQemuFwCfgS3LibFwCfg, a limited functionality
QemuFwCfgS3Lib instance, for PEI phase modules.
The patch also introduces DxeQemuFwCfgS3LibFwCfg, a full functionality
QemuFwCfgS3Lib instance, for DXE_DRIVER and DXE_RUNTIME_DRIVER modules.
These library instances share the QemuFwCfgS3Enabled() function. The
function actually uses fw_cfg; the implementation is copied from
"OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c".
The library instances will diverge in the following patches.
Cc: Jordan Justen <jordan.l.justen@intel.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=394
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Diffstat (limited to 'OvmfPkg/Library/QemuFwCfgS3Lib')
3 files changed, 127 insertions, 0 deletions
diff --git a/OvmfPkg/Library/QemuFwCfgS3Lib/DxeQemuFwCfgS3LibFwCfg.inf b/OvmfPkg/Library/QemuFwCfgS3Lib/DxeQemuFwCfgS3LibFwCfg.inf new file mode 100644 index 0000000000..7016575f3d --- /dev/null +++ b/OvmfPkg/Library/QemuFwCfgS3Lib/DxeQemuFwCfgS3LibFwCfg.inf @@ -0,0 +1,38 @@ +## @file
+# Full functionality QemuFwCfgS3Lib instance, for DXE phase modules.
+#
+# Copyright (C) 2017, Red Hat, Inc.
+#
+# 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 = 1.25
+ BASE_NAME = DxeQemuFwCfgS3LibFwCfg
+ FILE_GUID = C5DE76EB-E8DE-4057-A487-C5A09AB039AB
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = QemuFwCfgS3Lib|DXE_DRIVER DXE_RUNTIME_DRIVER
+
+#
+# The following information is for reference only and not required by the build
+# tools.
+#
+# VALID_ARCHITECTURES = IA32 X64 ARM AARCH64 IPF EBC
+#
+
+[Sources]
+ QemuFwCfgS3PeiDxe.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ OvmfPkg/OvmfPkg.dec
+
+[LibraryClasses]
+ QemuFwCfgLib
diff --git a/OvmfPkg/Library/QemuFwCfgS3Lib/PeiQemuFwCfgS3LibFwCfg.inf b/OvmfPkg/Library/QemuFwCfgS3Lib/PeiQemuFwCfgS3LibFwCfg.inf new file mode 100644 index 0000000000..2593af8e5b --- /dev/null +++ b/OvmfPkg/Library/QemuFwCfgS3Lib/PeiQemuFwCfgS3LibFwCfg.inf @@ -0,0 +1,41 @@ +## @file
+# Limited functionality QemuFwCfgS3Lib instance, for PEI phase modules.
+#
+# QemuFwCfgS3Enabled() queries S3 enablement via fw_cfg. Other library APIs
+# will report lack of support.
+#
+# Copyright (C) 2017, Red Hat, Inc.
+#
+# 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 = 1.25
+ BASE_NAME = PeiQemuFwCfgS3LibFwCfg
+ FILE_GUID = DD8D28B4-C1DC-4CAF-BB93-074BE80DAE6D
+ MODULE_TYPE = PEIM
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = QemuFwCfgS3Lib|PEIM
+
+#
+# The following information is for reference only and not required by the build
+# tools.
+#
+# VALID_ARCHITECTURES = IA32 X64 ARM AARCH64 IPF EBC
+#
+
+[Sources]
+ QemuFwCfgS3PeiDxe.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ OvmfPkg/OvmfPkg.dec
+
+[LibraryClasses]
+ QemuFwCfgLib
diff --git a/OvmfPkg/Library/QemuFwCfgS3Lib/QemuFwCfgS3PeiDxe.c b/OvmfPkg/Library/QemuFwCfgS3Lib/QemuFwCfgS3PeiDxe.c new file mode 100644 index 0000000000..f87d6b8227 --- /dev/null +++ b/OvmfPkg/Library/QemuFwCfgS3Lib/QemuFwCfgS3PeiDxe.c @@ -0,0 +1,48 @@ +/** @file
+ Shared code for the PEI fw_cfg and DXE fw_cfg instances of the QemuFwCfgS3Lib
+ class.
+
+ Copyright (C) 2017, Red Hat, Inc.
+
+ 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 <Library/QemuFwCfgLib.h>
+#include <Library/QemuFwCfgS3Lib.h>
+
+/**
+ Determine if S3 support is explicitly enabled.
+
+ @retval TRUE If S3 support is explicitly enabled. Other functions in this
+ library may be called (subject to their individual
+ restrictions).
+
+ FALSE Otherwise. This includes unavailability of the firmware
+ configuration interface. No other function in this library
+ must be called.
+**/
+BOOLEAN
+EFIAPI
+QemuFwCfgS3Enabled (
+ VOID
+ )
+{
+ RETURN_STATUS Status;
+ FIRMWARE_CONFIG_ITEM FwCfgItem;
+ UINTN FwCfgSize;
+ UINT8 SystemStates[6];
+
+ Status = QemuFwCfgFindFile ("etc/system-states", &FwCfgItem, &FwCfgSize);
+ if (Status != RETURN_SUCCESS || FwCfgSize != sizeof SystemStates) {
+ return FALSE;
+ }
+ QemuFwCfgSelectItem (FwCfgItem);
+ QemuFwCfgReadBytes (sizeof SystemStates, SystemStates);
+ return (BOOLEAN) (SystemStates[3] & BIT7);
+}
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