core: arm: use cpu_spin_lock_xsave() in generic timer implementation

Change generic timer driver for Arm 64bit architecture to use helper
functions cpu_spin_lock_xsave() and cpu_spin_unlock_xrestore

core: arm: use cpu_spin_lock_xsave() in generic timer implementation

Change generic timer driver for Arm 64bit architecture to use helper
functions cpu_spin_lock_xsave() and cpu_spin_unlock_xrestore()
instead of calling thread_mask_exceptions()/cpu_spin_lock() pair
and thread_set_exceptions()/cpu_spin_unlock() pair. This makes
the implementation more consistent with the rest of the source tree.

No functional change.

Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Etienne Carriere <etienne.carriere@foss.st.com>

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core: arm: fix integer overflow in generic_timer_{handler,start}()

In generic_timer_handler() and generic_timer_start(), read_cntfrq() can
return a pretty large 32-bit number, multiplying that with

core: arm: fix integer overflow in generic_timer_{handler,start}()

In generic_timer_handler() and generic_timer_start(), read_cntfrq() can
return a pretty large 32-bit number, multiplying that with a delay of
1000 ms can overflow. Fix that by casting the result from read_cntfrq()
to a uint64_t to avoid overflow during the calculation.

Fixes: ba6b29591828 ("core: arm64: Add Secure EL1 physical timer framework")
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>

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core: arm64: Add Secure EL1 physical timer framework

As an implementation of generic timer, arm64 platforms provides secure
EL1 physical timer. So enable corresponding framework. For more
informatio

core: arm64: Add Secure EL1 physical timer framework

As an implementation of generic timer, arm64 platforms provides secure
EL1 physical timer. So enable corresponding framework. For more
information refer to section: D6.1.5 Timers - ARMv8-A RM.

Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Acked-by: Joakim Bech <joakim.bech@linaro.org>

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