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Add the various flags that are required to build the components needed
to enable the RAS feature on SGI575 platform. By default, all flags
are set to 0, disabling building of all corresponding components.

Change-Id: I7f8536fba895043ef6e397cc33ac9126cb572132
Signed-off-by: Sughosh Ganu <sughosh.ganu@arm.com>

Add a platform specific handler for RAS interrupts and configure the
platform RAS interrupts for EL3 handling. The interrupt handler passes
control to StandaloneMM code executing in S-EL0, which populates the
CPER buffer with relevant error information. The handler subsequently
invokes the SDEI client which processes the information in the error
information in the CPER buffer. The helper functions
plat_sgi_get_ras_ev_map and plat_sgi_get_ras_ev_map_size would be
defined for sgi platforms in the subsequent patch, which adds sgi575
specific RAS changes.

Change-Id: I490f16c15d9917ac40bdc0441659b92380108d63
Signed-off-by: Sughosh Ganu <sughosh.ganu@arm.com>

Append a node to hw-config dtb which will include a property to hold
the value of the SSC_VERSION register. This will be used by the BL33
stage to determine the platform-id and the config-id of the platform
it is executing on.

Change-Id: Ie7b1e5d8c1bbe0efdb7ef0714f14b7794ec6058e
Signed-off-by: Amit Daniel Kachhap <amit.kachhap@arm.com>
Signed-off-by: Chandni Cherukuri <chandni.cherukuri@arm.com>

Remove the existing method of populating the platform id in arg2 of
BL33 which is no longer needed with dynamic configuration feature
enabled as the BL33 will get this information directly via the config
files. Add the tb_fw_config and hw_config dts files.

Change-Id: I3c93fec2aedf9ef1f774a5f0969d2d024e47ed2c
Signed-off-by: Chandni Cherukuri <chandni.cherukuri@arm.com>

Instead of instantiating a local copy of GICv3 driver data for SGI
platforms, reuse the existing instance of GICv3 driver data available
in the arm common platform code.

Change-Id: If6f38e15d1f0e20cea96fff98091da300015d295
Signed-off-by: Chandni Cherukuri <chandni.cherukuri@arm.com>
Signed-off-by: Vishwanatha HG <vishwanatha.hg@arm.com>

SGI-575 platform is based on Cortex-A75 processor which has its MT bit
in the MPIDR register set to '1'. So the Arm platform layer code has
to be made aware of this.
Signed-off-by: Sudipto Paul <sudipto.paul@arm.com>

Add support for System Guidance for Infrastructure platform SGI575.

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