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macro jump_if_cpu_midr is used commonly by many arm platform.
It has now been relocated to common place to remove duplication
of code.

Change-Id: Ic0876097dbc085df4f90eadb4b7687dde7c726da
Signed-off-by: Deepak Pandey <Deepak.Pandey@arm.com>

The Arm SGI platforms can switch to using SCMI. So enable support for
SCMI and remove portions of code that would be unused after switching
to SCMI.

Change-Id: Ifd9e1c944745f703da5f970b5daf1be2b07ed14e
Signed-off-by: Chandni Cherukuri <chandni.cherukuri@arm.com>

On SGI platforms, the 'CORE_PWRDN_EN' bit of 'CPUPWRCTLR_EL1'
register requires an explicit write to clear it for hotplug and
idle to function correctly. The reset value of this bit is zero
but it still requires this explicit clear to zero. This indicates
that this could be a model related issue but for now this issue can
be fixed be clearing the CORE_PWRDN_EN in the platform specific
reset handler function.

Change-Id: I4222930daa9a3abacdace6b7c3f4a5472ac0cb19
Signed-off-by: Chandni Cherukuri <chandni.cherukuri@arm.com>

The MT bit in MPIDR is always set for SGI platforms and so the
core position calculation code is updated to take into account
the thread affinity value as well.

Change-Id: I7b2a52707f607dc3859c6bbcd2b145b7987cb4ed
Signed-off-by: Chandni Cherukuri <chandni.cherukuri@arm.com>
Signed-off-by: Vishwanatha HG <vishwanatha.hg@arm.com>

Add support for System Guidance for Infrastructure platform SGI575.

Change-Id: I0125c2ed4469fbc8367dafcc8adce770b6b3147d
Signed-off-by: Nariman Poushin <nariman.poushin@linaro.org>