ARC: Add support for nSIM OSCI System C model

This adds support for an ARC Virtual Platform. This platform is based on the
System C standard promoted by the OSCI (Open System C Initiative) and uses
nSIM to simulate the ARC CPU core itself.

Users can build a virtual SoC by combining System C models of peripherals
and CPU cores.

Signed-off-by: Mischa Jonker <mjonker@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
diff --git a/arch/arc/plat-arcfpga/platform.c b/arch/arc/plat-arcfpga/platform.c
index 4e20a1a..b3700c0 100644
--- a/arch/arc/plat-arcfpga/platform.c
+++ b/arch/arc/plat-arcfpga/platform.c
@@ -224,3 +224,15 @@
 	.init_smp	= iss_model_init_smp,
 #endif
 MACHINE_END
+
+static const char *nsimosci_compat[] __initdata = {
+	"snps,nsimosci",
+	NULL,
+};
+
+MACHINE_START(NSIMOSCI, "nsimosci")
+	.dt_compat	= nsimosci_compat,
+	.init_early	= NULL,
+	.init_machine	= plat_fpga_populate_dev,
+	.init_irq	= NULL,
+MACHINE_END