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Dynamically populating the 'system-id' node in the HW_CONFIG dts makes
it difficult to enforce memory overlap checks. So add the system-id node
in the HW_CONFIG dts file as a place holder with 'platform-id' and
'config-id' set to zero.

The code at BL2 stage determines the values of 'platform-id' and
'config-id' at runtime and updates the corresponding fields in the
system-id node of HW_CONFIG dts.

Change-Id: I2ca9980b994ac418da8afa0c72716ede10aff68a
Signed-off-by: Chandni Cherukuri <chandni.cherukuri@arm.com>

To align the placement of ftds files with that of other Arm platforms,
move the ftds files from plat/arm/css/sgi/ to plat/arm/board/sgi575.

Change-Id: Id7c772eb5cf3d308d4e02a3c8099218e889a0e96
Signed-off-by: Chandni Cherukuri <chandni.cherukuri@arm.com>

In preparation of adding support for upcoming SGI platforms, macros
common to all the SGI platforms are moved into sgi_base_platform_def.h
file. Macros that are specific to sgi575 platform remain in the
platform_def.h file. In addition to this, the platform_def.h file is
moved to sgi575 board directory. Also the ENT_CPU_SOURCES has been
renamed to SGI_CPU_SOURCES and moved from sgi-common.mk to board
specific makefile platform.mk

Change-Id: Iccdd9f070f4feea232b9fbf4fdcc0ef2e8eccbf2
Signed-off-by: Chandni Cherukuri <chandni.cherukuri@arm.com>

This way it can be reused by other platforms if needed.

Note that this driver is designed to work with the Versatile Express NOR
flash of Juno and FVP. In said platforms, the memory is organized as an
interleaved memory of two chips with a 16 bit word.

Any platform that wishes to reuse it with a different configuration will
need to modify the driver so that it is more generic.

Change-Id: Ic721758425864e0cf42b7b9b04bf0d9513b6022e
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

All the arm platforms were including the files related to
mem-protect. This configuration generates some problems
with new platforms that don't support such functionality,
and for that reason this patch moves these files to the
platform specific makefiles.

Change-Id: I6923e5224668b76667795d8e11723cede7979b1e
Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>

Add support for System Guidance for Infrastructure platform SGI575.

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