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| author | Min Xu <min.m.xu@intel.com> | 2022-02-12 14:06:46 +0800 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2022-04-02 08:15:12 +0000 |
| commit | 57bcfc3b06ad6edd7999313280f8d99b47f13ad5 (patch) | |
| tree | 1d3ee44cb6eda6393347e60bf14da41690a9cc63 /OvmfPkg/Library/PlatformInitLib | |
| parent | 6a608255bb431a1b71e49899763ca72108f8ed3f (diff) | |
| download | edk2-57bcfc3b06ad6edd7999313280f8d99b47f13ad5.tar.gz edk2-57bcfc3b06ad6edd7999313280f8d99b47f13ad5.tar.bz2 edk2-57bcfc3b06ad6edd7999313280f8d99b47f13ad5.zip | |
OvmfPkg: Create initial version of PlatformInitLib
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3863
There are 3 variants of PlatformPei in OvmfPkg:
- OvmfPkg/PlatformPei
- OvmfPkg/XenPlatformPei
- OvmfPkg/Bhyve/PlatformPei/PlatformPei.inf
These PlatformPeis can share many common codes, such as
Cmos / Hob / Memory / Platform related functions. This commit
(and its following several patches) are to create a PlatformInitLib
which wraps the common code called in above PlatformPeis.
In this initial version of PlatformInitLib, below Cmos related functions
are introduced:
- PlatformCmosRead8
- PlatformCmosWrite8
- PlatformDebugDumpCmos
They correspond to the functions in OvmfPkg/PlatformPei:
- CmosRead8
- CmosWrite8
- DebugDumpCmos
Considering this PlatformInitLib will be used in SEC phase, global
variables and dynamic PCDs are avoided. We use PlatformInfoHob
to exchange information between functions.
EFI_HOB_PLATFORM_INFO is the data struct which contains the platform
information, such as HostBridgeDevId, BootMode, S3Supported,
SmmSmramRequire, etc.
After PlatformInitLib is created, OvmfPkg/PlatformPei is refactored
with this library.
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>
Diffstat (limited to 'OvmfPkg/Library/PlatformInitLib')
| -rw-r--r-- | OvmfPkg/Library/PlatformInitLib/Cmos.c | 81 | ||||
| -rw-r--r-- | OvmfPkg/Library/PlatformInitLib/PlatformInitLib.inf | 36 |
2 files changed, 117 insertions, 0 deletions
diff --git a/OvmfPkg/Library/PlatformInitLib/Cmos.c b/OvmfPkg/Library/PlatformInitLib/Cmos.c new file mode 100644 index 0000000000..977aa97aea --- /dev/null +++ b/OvmfPkg/Library/PlatformInitLib/Cmos.c @@ -0,0 +1,81 @@ +/** @file
+ PC/AT CMOS access routines
+
+ Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/PlatformInitLib.h>
+#include <Library/DebugLib.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
+PlatformCmosRead8 (
+ 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
+PlatformCmosWrite8 (
+ IN UINTN Index,
+ IN UINT8 Value
+ )
+{
+ IoWrite8 (0x70, (UINT8)Index);
+ IoWrite8 (0x71, Value);
+ return Value;
+}
+
+/**
+ Dump the CMOS content
+ */
+VOID
+EFIAPI
+PlatformDebugDumpCmos (
+ VOID
+ )
+{
+ UINT32 Loop;
+
+ DEBUG ((DEBUG_INFO, "CMOS:\n"));
+
+ for (Loop = 0; Loop < 0x80; Loop++) {
+ if ((Loop % 0x10) == 0) {
+ DEBUG ((DEBUG_INFO, "%02x:", Loop));
+ }
+
+ DEBUG ((DEBUG_INFO, " %02x", PlatformCmosRead8 (Loop)));
+ if ((Loop % 0x10) == 0xf) {
+ DEBUG ((DEBUG_INFO, "\n"));
+ }
+ }
+}
diff --git a/OvmfPkg/Library/PlatformInitLib/PlatformInitLib.inf b/OvmfPkg/Library/PlatformInitLib/PlatformInitLib.inf new file mode 100644 index 0000000000..4ea2da8627 --- /dev/null +++ b/OvmfPkg/Library/PlatformInitLib/PlatformInitLib.inf @@ -0,0 +1,36 @@ +## @file
+# Platform Initialization Lib
+#
+# This module provides platform specific function to detect boot mode.
+# Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = PlatformInitLib
+ FILE_GUID = 89f886b0-7109-46e1-9d28-503ad4ab6ee0
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = PlatformInitLib|PEIM
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+# VALID_ARCHITECTURES = IA32 X64 EBC
+#
+
+[Sources]
+ Cmos.c
+
+[Packages]
+ MdeModulePkg/MdeModulePkg.dec
+ MdePkg/MdePkg.dec
+ OvmfPkg/OvmfPkg.dec
+
+[LibraryClasses]
+ BaseLib
+ DebugLib
+ IoLib
|