1. The consumer of Acpi Sdt Protocol may want to use the API after ReadyToLock.
2. The ACPI system configuration table even could be overwritten,
we see little issue in leaving Acpi Sdt Protocol installed.
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
UEFI spec has clear description below:
Configuration Table Groups
The GUID for a configuration table also defines a corresponding event group GUID with the same value.
If the data represented by a configuration table is changed,
InstallConfigurationTable() should be called.
When InstallConfigurationTable() is called, the corresponding event is signaled.
When this event is signaled,
any components that cache information from the configuration table can optionally update their cached state.
For example, EFI_ACPI_TABLE_GUID defines a configuration table for ACPI data.
When ACPI data is changed, InstallConfigurationTable() is called.
During the execution of InstallConfigurationTable(),
a corresponding event group with EFI_ACPI_TABLE_GUID is signaled,
allowing an application to invalidate any cached ACPI data.
But current implementation only InstallConfigurationTable() at first time ACPI data change.
if (((Version & EFI_ACPI_TABLE_VERSION_1_0B) != 0) &&
!AcpiTableInstance->TablesInstalled1) {
Status = gBS->InstallConfigurationTable (&gEfiAcpi10TableGuid, AcpiTableInstance->Rsdp1);
if (EFI_ERROR (Status)) {
return EFI_ABORTED;
}
AcpiTableInstance->TablesInstalled1 = TRUE;
}
if (((Version & ACPI_TABLE_VERSION_GTE_2_0) != 0) &&
!AcpiTableInstance->TablesInstalled3) {
Status = gBS->InstallConfigurationTable (&gEfiAcpiTableGuid, AcpiTableInstance->Rsdp3);
if (EFI_ERROR (Status)) {
return EFI_ABORTED;
}
AcpiTableInstance->TablesInstalled3= TRUE;
}
The AcpiTableInstance->TablesInstalled1 and AcpiTableInstance->TablesInstalled3 conditional judgment need to be removed.
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@17885 6f19259b-4bc3-4df7-8a09-765794883524
* Universal/Acpi/AcpiTableDxe
Implementation of EFI_ACPI_TABLE_PROTOCOL
(MdePkg/Include/Protocol/AcpiTable.h)
* Universal/Acpi/AcpiPlatformDxe
Sample "ACPI Platform Driver" which populates the
system ACPI tables by reading them from an
FFS file and using EFI_ACPI_TABLE_PROTOCOL
to make them available to the system.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@7917 6f19259b-4bc3-4df7-8a09-765794883524
Star Zeng
jyao1
hhtian
jljusten