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ArmPkg: cache detected revision in ArmGicArchLib 

Instead of inferring the GIC revision from the CPU id registers
and the presence/availability of the system register interface
upon each invocation, move the logic to a constructor and cache
the result.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
Tested-by: Leif Lindholm <leif.lindholm@linaro.org>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18100 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Ard Biesheuvel 2015-07-28 20:45:10 +00:00 committed by abiesheuvel
parent e9e9c7e8a4
commit f94522c823
3 changed files with 40 additions and 9 deletions
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23
ArmPkg/Library/ArmGicArchLib/AArch64/ArmGicArchLib.c
View File

@ -15,9 +15,11 @@
#include <Library/ArmLib.h>
#include <Library/ArmGicLib.h>
ARM_GIC_ARCH_REVISION
STATIC ARM_GIC_ARCH_REVISION mGicArchRevision;
RETURN_STATUS
EFIAPI
ArmGicGetSupportedArchRevision (
ArmGicArchLibInitialize (
VOID
)
{
@ -43,9 +45,22 @@ ArmGicGetSupportedArchRevision (
IccSre = ArmGicV3GetControlSystemRegisterEnable ();
}
if (IccSre & ICC_SRE_EL2_SRE) {
return ARM_GIC_ARCH_REVISION_3;
mGicArchRevision = ARM_GIC_ARCH_REVISION_3;
goto Done;
}
}
return ARM_GIC_ARCH_REVISION_2;
mGicArchRevision = ARM_GIC_ARCH_REVISION_2;
Done:
return RETURN_SUCCESS;
}
ARM_GIC_ARCH_REVISION
EFIAPI
ArmGicGetSupportedArchRevision (
VOID
)
{
return mGicArchRevision;
}

23
ArmPkg/Library/ArmGicArchLib/Arm/ArmGicArchLib.c
View File

@ -15,9 +15,11 @@
#include <Library/ArmLib.h>
#include <Library/ArmGicLib.h>
ARM_GIC_ARCH_REVISION
STATIC ARM_GIC_ARCH_REVISION mGicArchRevision;
RETURN_STATUS
EFIAPI
ArmGicGetSupportedArchRevision (
ArmGicArchLibInitialize (
VOID
)
{
@ -43,9 +45,22 @@ ArmGicGetSupportedArchRevision (
IccSre = ArmGicV3GetControlSystemRegisterEnable ();
}
if (IccSre & ICC_SRE_EL2_SRE) {
return ARM_GIC_ARCH_REVISION_3;
mGicArchRevision = ARM_GIC_ARCH_REVISION_3;
goto Done;
}
}
return ARM_GIC_ARCH_REVISION_2;
mGicArchRevision = ARM_GIC_ARCH_REVISION_2;
Done:
return RETURN_SUCCESS;
}
ARM_GIC_ARCH_REVISION
EFIAPI
ArmGicGetSupportedArchRevision (
VOID
)
{
return mGicArchRevision;
}

3
ArmPkg/Library/ArmGicArchLib/ArmGicArchLib.inf
View File

@ -17,7 +17,8 @@
FILE_GUID = cd67f41a-26e9-4482-90c9-a9aff803382a
MODULE_TYPE = BASE
VERSION_STRING = 1.0
LIBRARY_CLASS = ArmGicArchLib
LIBRARY_CLASS = ArmGicArchLib|DXE_DRIVER UEFI_DRIVER UEFI_APPLICATION
CONSTRUCTOR = ArmGicArchLibInitialize
[Sources.ARM]
Arm/ArmGicArchLib.c