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authorStar Zeng <star.zeng@intel.com>2014-05-06 02:11:23 +0000
committerlzeng14 <lzeng14@6f19259b-4bc3-4df7-8a09-765794883524>2014-05-06 02:11:23 +0000
commit5966402ed51c5b611bf437c812047dc9c432a47e (patch)
treec6fa2a7aabd067fe170813ff84dd9cbfb7fe89d3 /MdePkg
parenta06ec3e2af16c64709a77c8a354d6cec92185f1f (diff)
downloadedk2-5966402ed51c5b611bf437c812047dc9c432a47e.tar.gz
edk2-5966402ed51c5b611bf437c812047dc9c432a47e.tar.bz2
edk2-5966402ed51c5b611bf437c812047dc9c432a47e.zip
MdeModulePkg/IntelFrameworkModulePkg ACPI: Follow the new UEFI 2.4a spec to return EFI_ACCESS_DENIED for duplicated FADT, FACS or DSDT installation.
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Star Zeng <star.zeng@intel.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15496 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg')
-rw-r--r--MdePkg/Include/Protocol/AcpiTable.h14
1 files changed, 11 insertions, 3 deletions
diff --git a/MdePkg/Include/Protocol/AcpiTable.h b/MdePkg/Include/Protocol/AcpiTable.h
index 13a39d89c1..6149b7e453 100644
--- a/MdePkg/Include/Protocol/AcpiTable.h
+++ b/MdePkg/Include/Protocol/AcpiTable.h
@@ -2,7 +2,7 @@
The file provides the protocol to install or remove an ACPI
table from a platform.
- Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2006 - 2014, 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
@@ -31,7 +31,12 @@ typedef struct _EFI_ACPI_TABLE_PROTOCOL EFI_ACPI_TABLE_PROTOCOL;
copy into the RSDT/XSDT. InstallAcpiTable() must insert the new
table at the end of the RSDT/XSDT. To prevent namespace
collision, ACPI tables may be created using UEFI ACPI table
- format. On successful output, TableKey is
+ format. If this protocol is used to install a table with a
+ signature already present in the system, the new table will not
+ replace the existing table. It is a platform implementation
+ decision to add a new table with a signature matching an
+ existing table or disallow duplicate table signatures and
+ return EFI_ACCESS_DENIED. On successful output, TableKey is
initialized with a unique key. Its value may be used in a
subsequent call to UninstallAcpiTable to remove an ACPI table.
If an EFI application is running at the time of this call, the
@@ -61,7 +66,10 @@ typedef struct _EFI_ACPI_TABLE_PROTOCOL EFI_ACPI_TABLE_PROTOCOL;
@retval EFI_OUT_OF_RESOURCES Insufficient resources exist to
complete the request.
-
+ @retval EFI_ACCESS_DENIED The table signature matches a table already
+ present in the system and platform policy
+ does not allow duplicate tables of this type.
+
**/
typedef
EFI_STATUS