audk/ArmPkg/Drivers
Ard Biesheuvel 37ec4d9af7 ArmPkg/ArmGicLib: select GICv2 mode if SRE is present but unavailable
Even if the CPU id registers indicate hardware support for the
System Register interface to the GIC, higher exception levels
may disable that interface and only allow access through MMIO.

So move the enabling of the SRE bit to the GIC version detection
routine: if we trigger an exception, we would have anyway at a
later stage, so the net effect is the same. However, if setting
the bit doesn't stick, it means we can switch to MMIO and proceed
normally otherwise.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16344 6f19259b-4bc3-4df7-8a09-765794883524
2014-11-13 16:41:51 +00:00
..
ArmCpuLib ArmPkg: Move TimerDxe and ArmArchTimerLib to new ArmGenericTimerCounterLib 2014-09-09 16:10:18 +00:00
ArmGic ArmPkg/ArmGicLib: select GICv2 mode if SRE is present but unavailable 2014-11-13 16:41:51 +00:00
CpuDxe ARM Packages: Removed trailing spaces 2014-08-19 13:29:52 +00:00
CpuPei ARM Packages: Removed trailing spaces 2014-08-19 13:29:52 +00:00
TimerDxe ArmPkg/TimerDxe: add workaround for KVM timer interrupt handling 2014-09-18 21:16:47 +00:00