plat/arm: Introduce TC0 platform

This patch adds support for Total Compute (TC0) platform. It is an
initial port and additional features are expected to be added later.

TC0 has a SCP which brings the primary Cortex-A out of reset
which starts executing BL1. TF-A optionally authenticates the SCP
ram-fw available in FIP and makes it available for SCP to copy.

Some of the major features included and tested in this platform
port include TBBR, PSCI, MHUv2 and DVFS.

Change-Id: I1675e9d200ca7687c215009eef483d9b3ee764ef
Signed-off-by: Usama Arif <usama.arif@arm.com>
diff --git a/plat/arm/board/tc0/platform.mk b/plat/arm/board/tc0/platform.mk
new file mode 100644
index 0000000..265826f
--- /dev/null
+++ b/plat/arm/board/tc0/platform.mk
@@ -0,0 +1,97 @@
+# Copyright (c) 2020, ARM Limited and Contributors. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+CSS_LOAD_SCP_IMAGES	:=	1
+
+CSS_USE_SCMI_SDS_DRIVER	:=	1
+
+RAS_EXTENSION		:=	0
+
+SDEI_SUPPORT		:=	0
+
+EL3_EXCEPTION_HANDLING	:=	0
+
+HANDLE_EA_EL3_FIRST	:=	0
+
+# System coherency is managed in hardware
+HW_ASSISTED_COHERENCY	:=	1
+
+# When building for systems with hardware-assisted coherency, there's no need to
+# use USE_COHERENT_MEM. Require that USE_COHERENT_MEM must be set to 0 too.
+USE_COHERENT_MEM	:=	0
+
+GIC_ENABLE_V4_EXTN	:=      1
+
+# GIC-600 configuration
+GICV3_IMPL		:=	GIC600
+
+# Include GICv3 driver files
+include drivers/arm/gic/v3/gicv3.mk
+
+ENT_GIC_SOURCES		:=	${GICV3_SOURCES}		\
+				plat/common/plat_gicv3.c	\
+				plat/arm/common/arm_gicv3.c
+
+override NEED_BL2U	:=	no
+
+override ARM_PLAT_MT	:=	1
+
+TC0_BASE	=	plat/arm/board/tc0
+
+PLAT_INCLUDES		+=	-I${TC0_BASE}/include/
+
+TC0_CPU_SOURCES	:=	lib/cpus/aarch64/cortex_matterhorn.S
+
+INTERCONNECT_SOURCES	:=	${TC0_BASE}/tc0_interconnect.c
+
+PLAT_BL_COMMON_SOURCES	+=	${TC0_BASE}/tc0_plat.c	\
+				${TC0_BASE}/include/tc0_helpers.S
+
+BL1_SOURCES		+=	${INTERCONNECT_SOURCES}	\
+				${TC0_CPU_SOURCES}	\
+				${TC0_BASE}/tc0_trusted_boot.c	\
+				${TC0_BASE}/tc0_err.c	\
+				drivers/arm/sbsa/sbsa.c
+
+
+BL2_SOURCES		+=	${TC0_BASE}/tc0_security.c	\
+				${TC0_BASE}/tc0_err.c		\
+				${TC0_BASE}/tc0_trusted_boot.c		\
+				lib/utils/mem_region.c			\
+				plat/arm/common/arm_nor_psci_mem_protect.c
+
+BL31_SOURCES		+=	${INTERCONNECT_SOURCES}	\
+				${TC0_CPU_SOURCES}	\
+				${ENT_GIC_SOURCES}			\
+				${TC0_BASE}/tc0_bl31_setup.c	\
+				${TC0_BASE}/tc0_topology.c	\
+				drivers/cfi/v2m/v2m_flash.c		\
+				lib/utils/mem_region.c			\
+				plat/arm/common/arm_nor_psci_mem_protect.c
+
+# Add the FDT_SOURCES and options for Dynamic Config
+FDT_SOURCES		+=	${TC0_BASE}/fdts/${PLAT}_fw_config.dts
+TB_FW_CONFIG		:=	${BUILD_PLAT}/fdts/${PLAT}_fw_config.dtb
+
+# Add the TB_FW_CONFIG to FIP and specify the same to certtool
+$(eval $(call TOOL_ADD_PAYLOAD,${TB_FW_CONFIG},--tb-fw-config))
+
+#Device tree
+TC0_HW_CONFIG_DTS	:=	fdts/tc0.dts
+TC0_HW_CONFIG		:=	${BUILD_PLAT}/fdts/${PLAT}.dtb
+FDT_SOURCES		+=	${TC0_HW_CONFIG_DTS}
+$(eval TC0_HW_CONFIG	:=	${BUILD_PLAT}/$(patsubst %.dts,%.dtb,$(TC0_HW_CONFIG_DTS)))
+
+# Add the HW_CONFIG to FIP and specify the same to certtool
+$(eval $(call TOOL_ADD_PAYLOAD,${TC0_HW_CONFIG},--hw-config))
+
+override CTX_INCLUDE_AARCH32_REGS	:= 0
+
+override CTX_INCLUDE_PAUTH_REGS	:= 1
+
+include plat/arm/common/arm_common.mk
+include plat/arm/css/common/css_common.mk
+include plat/arm/soc/common/soc_css.mk
+include plat/arm/board/common/board_common.mk