SErrors (formerly called asynchronous aborts) are a distinct class of
exceptions that are not closely tied to the currently executing
instruction. Since execution may be able to proceed in such a condition,
this class of exception is masked by default, and software needs to unmask
it explicitly if it is prepared to handle such exceptions.
On DEBUG builds, we are well equipped to report the CPU context to the user
and it makes sense to report an SError as soon as it occurs rather than to
wait for the OS to take it when it unmasks them, especially since the current
arm64/Linux implementation simply panics in that case. So unmask them when
ArmCpuDxe loads.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
Use the new ARM/AArch64 implementation of the base
CpuExceptionHandlerLib library from CpuDxe to centralize
exception handling.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Eugene Cohen <eugene@hp.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
If a FDT blob is passed to the kernel it is required we can load it.
If we fail to load the binary then we must abort the Linux booting
process.
ArmPkg/CpuDxe: Ensure the reset vector passed to the CP15 VBAR register is aligned on the right boundary
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11968 6f19259b-4bc3-4df7-8a09-765794883524
Previously the CPU driver had a dependency on the GIC driver.
But by design is should be the opposite. The CPU driver installs the
CPU protocol that exposes the exception registration function.
And then, the interrupt controller registers its IRQ handler through
this interface.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11860 6f19259b-4bc3-4df7-8a09-765794883524
These functions set/clear the SCTLR.V bit that controls the location
of the Vector Table.
This commit also forces the SCTLR.V to be clear when the VBAR register
is set.
Note: The original fix has been proposed by Eugene Cohen (HP).
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11739 6f19259b-4bc3-4df7-8a09-765794883524
The Exception Vector can be set before installing the CPU DXE driver to add
debugger support at the early stage of the firmware initialization.
If no one has touched the exception vector prior to the CPU DXE then the Vector
might contain non zero data.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11733 6f19259b-4bc3-4df7-8a09-765794883524
ArmPkg - Supoprt for ARM specific things that can change as the architecture changes. Plus semihosting JTAG drivers.
EmbeddedPkg - Generic support for an embeddded platform. Including a light weight command line shell.
BeagleBoardPkg - Platform specifics for BeagleBoard. SD Card works, but USB has issues. Looks like a bug in the open source USB stack (Our internal stack works fine).
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9518 6f19259b-4bc3-4df7-8a09-765794883524
Ard Biesheuvel
Cohen, Eugene
oliviermartin
andrewfish
hhtian
AJFISH