ARC: nSIM: Add RMX100 platform

This PR adds support for new Synopsys nSIM RMX100 platform.
New platform based on RISC-V ISA instead of classic ARC.

Signed-off-by: Nikolay Agishev <agishev@synopsys.com>

soc/snps/nsim/arc_v/CMakeLists.txt

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: Apache-2.0
+
+add_subdirectory(${SOC_SERIES})

soc/snps/nsim/arc_v/Kconfig

@@ -0,0 +1,8 @@
+# Copyright (c) 2024 Synopsys, Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+if SOC_FAMILY_NSIM_ARC_V
+
+rsource "*/Kconfig"
+
+endif # SOC_FAMILY_NSIM_ARC_V

soc/snps/nsim/arc_v/Kconfig.defconfig

@@ -0,0 +1,8 @@
+# Copyright (c) 2024 Synopsys, Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+if SOC_FAMILY_NSIM_ARC_V
+
+rsource "*/Kconfig.defconfig"
+
+endif # SOC_FAMILY_NSIM_ARC_V

soc/snps/nsim/arc_v/Kconfig.soc

@@ -0,0 +1,10 @@
+# Copyright (c) 2024 Synopsys, Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+config SOC_FAMILY_NSIM_ARC_V
+	bool
+
+config SOC_FAMILY
+	default "nsim_arc_v" if SOC_FAMILY_NSIM_ARC_V
+
+rsource "*/Kconfig.soc"

soc/snps/nsim/arc_v/rmx/CMakeLists.txt

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: Apache-2.0
+
+set(SOC_LINKER_SCRIPT ${ZEPHYR_BASE}/include/zephyr/arch/riscv/common/linker.ld CACHE INTERNAL "")

soc/snps/nsim/arc_v/rmx/Kconfig

@@ -0,0 +1,16 @@
+# Copyright (c) 2024 Synopsys, Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+config SOC_SERIES_RMX
+	bool
+
+	select RISCV
+	select RISCV_PRIVILEGED
+	select RISCV_ISA_RV32I
+	select RISCV_ISA_EXT_M
+	select RISCV_ISA_EXT_A
+	select RISCV_ISA_EXT_C
+	select RISCV_ISA_EXT_ZICSR
+	select RISCV_ISA_EXT_ZIFENCEI
+	select INCLUDE_RESET_VECTOR
+	select ATOMIC_OPERATIONS_BUILTIN

soc/snps/nsim/arc_v/rmx/Kconfig.defconfig

@@ -0,0 +1,18 @@
+# Copyright (c) 2024 Synopsys, Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+if SOC_SERIES_RMX
+
+config RISCV_SOC_INTERRUPT_INIT
+	default y
+
+config RISCV_GP
+	default y
+
+config MULTI_LEVEL_INTERRUPTS
+	default n
+
+config NUM_IRQS
+	default 18
+
+endif # SOC_SERIES_RMX

soc/snps/nsim/arc_v/rmx/Kconfig.soc

@@ -0,0 +1,16 @@
+# Copyright (c) 2024 Synopsys, Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+config SOC_SERIES_RMX
+	bool
+	select SOC_FAMILY_NSIM_ARC_V
+
+config SOC_SERIES
+	default "rmx" if SOC_SERIES_RMX
+
+config SOC_RMX100
+	bool
+	select SOC_SERIES_RMX
+
+config SOC
+	default "rmx100" if SOC_RMX100

soc/snps/nsim/arc_v/soc.yml

@@ -0,0 +1,6 @@
+family:
+  - name: nsim_arc_v
+    series:
+      - name: rmx
+        socs:
+          - name: rmx100