arm: Add support for Actions Semi OWL SoC family

This commit adds Actions Semi OWL SoC family support with S900 as the
first target SoC.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

arch/arm/Kconfig

@@ -708,6 +708,13 @@ config ARCH_MX5
 	select BOARD_EARLY_INIT_F
 	imply MXC_GPIO
 
+config ARCH_OWL
+	bool "Actions Semi OWL SoCs"
+	select ARM64
+	select DM
+	select DM_SERIAL
+	select OF_CONTROL
+
 config ARCH_QEMU
 	bool "QEMU Virtual Platform"
 	select DM
@@ -1357,6 +1364,8 @@ source "arch/arm/cpu/armv8/fsl-layerscape/Kconfig"
 
 source "arch/arm/mach-orion5x/Kconfig"
 
+source "arch/arm/mach-owl/Kconfig"
+
 source "arch/arm/mach-rmobile/Kconfig"
 
 source "arch/arm/mach-meson/Kconfig"

arch/arm/Makefile

@@ -66,6 +66,7 @@ machine-$(CONFIG_ARCH_MVEBU)		+= mvebu
 # TODO: rename CONFIG_ORION5X -> CONFIG_ARCH_ORION5X
 machine-$(CONFIG_ORION5X)		+= orion5x
 machine-$(CONFIG_ARCH_OMAP2PLUS)	+= omap2
+machine-$(CONFIG_ARCH_OWL)		+= owl
 machine-$(CONFIG_ARCH_S5PC1XX)		+= s5pc1xx
 machine-$(CONFIG_ARCH_SUNXI)		+= sunxi
 machine-$(CONFIG_ARCH_SNAPDRAGON)	+= snapdragon

arch/arm/dts/s900.dtsi

@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// Device Tree Source for Actions Semi S900 SoC
+//
+// Copyright (C) 2015 Actions Semi Co., Ltd.
+// Copyright (C) 2018 Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+
+/dts-v1/;
+
+/ {
+	compatible = "actions,s900";
+	#address-cells = <0x2>;
+	#size-cells = <0x2>;
+
+	soc {
+		u-boot,dm-pre-reloc;
+		compatible = "simple-bus";
+		#address-cells = <0x2>;
+		#size-cells = <0x2>;
+		ranges;
+	};
+};
+

arch/arm/mach-owl/Kconfig

@@ -0,0 +1,6 @@
+if ARCH_OWL
+
+config SYS_SOC
+	default "owl"
+
+endif

arch/arm/mach-owl/Makefile

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier:	GPL-2.0+
+
+obj-y += sysmap-s900.o

arch/arm/mach-owl/sysmap-s900.c

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Actions Semi S900 Memory map
+ *
+ * Copyright (C) 2015 Actions Semi Co., Ltd.
+ * Copyright (C) 2018 Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+ */
+
+#include <common.h>
+#include <asm/armv8/mmu.h>
+
+static struct mm_region s900_mem_map[] = {
+	{
+		.virt = 0x0UL, /* DDR */
+		.phys = 0x0UL, /* DDR */
+		.size = 0x80000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+			 PTE_BLOCK_INNER_SHARE
+	}, {
+		.virt = 0xE0000000UL, /* Peripheral block */
+		.phys = 0xE0000000UL, /* Peripheral block */
+		.size = 0x08000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+			 PTE_BLOCK_NON_SHARE |
+			 PTE_BLOCK_PXN | PTE_BLOCK_UXN
+	}, {
+		/* List terminator */
+		0,
+	}
+};
+
+struct mm_region *mem_map = s900_mem_map;