board: ns3: add support for Broadcom Northstar 3

Add support for Broadcom Northstar 3 SoC.
NS3 is a octo-core 64-bit ARMv8 Cortex-A72 processors
targeting a broad range of networking applications.

Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/arm/Kconfig

@@ -732,6 +732,15 @@ config TARGET_BCMNS2
 	  ARMv8 Cortex-A57 processors targeting a broad range of networking
 	  applications.
 
+config TARGET_BCMNS3
+	bool "Support Broadcom NS3"
+	select ARM64
+	select BOARD_LATE_INIT
+	help
+	  Support for Broadcom Northstar 3 SoCs. NS3 is a octo-core 64-bit
+	  ARMv8 Cortex-A72 processors targeting a broad range of networking
+	  applications.
+
 config ARCH_EXYNOS
 	bool "Samsung EXYNOS"
 	select DM
@@ -1916,6 +1925,7 @@ source "board/broadcom/bcm968580xref/Kconfig"
 source "board/broadcom/bcmcygnus/Kconfig"
 source "board/broadcom/bcmnsp/Kconfig"
 source "board/broadcom/bcmns2/Kconfig"
+source "board/broadcom/bcmns3/Kconfig"
 source "board/cavium/thunderx/Kconfig"
 source "board/cirrus/edb93xx/Kconfig"
 source "board/eets/pdu001/Kconfig"

arch/arm/dts/Makefile

@@ -930,6 +930,8 @@ dtb-$(CONFIG_ARCH_BCM68360) += \
 dtb-$(CONFIG_ARCH_BCM6858) += \
 	bcm968580xref.dtb
 
+dtb-$(CONFIG_TARGET_BCMNS3) += ns3-board.dtb
+
 dtb-$(CONFIG_ARCH_ASPEED) += ast2500-evb.dtb
 
 dtb-$(CONFIG_ARCH_STI) += stih410-b2260.dtb

arch/arm/dts/ns3-board.dts

@@ -0,0 +1,24 @@
+// SPDX-License-Identifier:      GPL-2.0+
+/*
+ * Copyright (C) 2020 Broadcom
+ */
+
+/dts-v1/;
+
+#include "ns3.dtsi"
+
+/ {
+	model = "NS3 model";
+
+	aliases {
+		serial0 = &uart1;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+};
+
+&uart1 {
+	status = "okay";
+};

arch/arm/dts/ns3.dtsi

@@ -0,0 +1,34 @@
+// SPDX-License-Identifier:      GPL-2.0+
+/*
+ * Copyright (C) 2020 Broadcom
+ */
+
+#include "skeleton64.dtsi"
+
+/ {
+	compatible = "brcm,ns3";
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	memory {
+		device_type = "memory";
+		reg = <0x0 0x80000000 0x0 0x80000000>,
+			<0x8 0x80000000 0x1 0x80000000>;
+	};
+
+	hsls {
+		compatible = "simple-bus";
+		dma-ranges;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0x0 0x0 0x68900000 0x17700000>;
+
+		uart1: uart@110000 {
+			compatible = "snps,dw-apb-uart";
+			reg = <0x00110000 0x1000>;
+			reg-shift = <2>;
+			clock-frequency = <25000000>;
+			status = "disabled";
+		};
+	};
+};

board/broadcom/bcmns3/Kconfig

@@ -0,0 +1,15 @@
+if TARGET_BCMNS3
+
+config SYS_BOARD
+	default "bcmns3"
+
+config SYS_VENDOR
+	default "broadcom"
+
+config SYS_SOC
+	default "bcmns3"
+
+config SYS_CONFIG_NAME
+	default "bcm_ns3"
+
+endif

board/broadcom/bcmns3/Makefile

@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright 2020 Broadcom.
+
+obj-y	:= ns3.o

board/broadcom/bcmns3/ns3.c

@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2020 Broadcom.
+ *
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/armv8/mmu.h>
+
+static struct mm_region ns3_mem_map[] = {
+	{
+		.virt = 0x0UL,
+		.phys = 0x0UL,
+		.size = 0x80000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+			 PTE_BLOCK_NON_SHARE |
+			 PTE_BLOCK_PXN | PTE_BLOCK_UXN
+	}, {
+		.virt = 0x80000000UL,
+		.phys = 0x80000000UL,
+		.size = 0x80000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+			 PTE_BLOCK_INNER_SHARE
+	}, {
+		/* List terminator */
+		0,
+	}
+};
+
+struct mm_region *mem_map = ns3_mem_map;
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int board_init(void)
+{
+	return 0;
+}
+
+int board_late_init(void)
+{
+	return 0;
+}
+
+int dram_init(void)
+{
+	if (fdtdec_setup_mem_size_base() != 0)
+		return -EINVAL;
+
+	return 0;
+}
+
+int dram_init_banksize(void)
+{
+	fdtdec_setup_memory_banksize();
+
+	return 0;
+}
+
+void reset_cpu(ulong addr)
+{
+	psci_system_reset();
+}

configs/bcm_ns3_defconfig

@@ -0,0 +1,20 @@
+CONFIG_ARM=y
+CONFIG_TARGET_BCMNS3=y
+CONFIG_SYS_TEXT_BASE=0xFF000000
+CONFIG_ENV_SIZE=0x80000
+CONFIG_NR_DRAM_BANKS=2
+CONFIG_LOGLEVEL=7
+CONFIG_SILENT_CONSOLE=y
+CONFIG_SILENT_U_BOOT_ONLY=y
+# CONFIG_SILENT_CONSOLE_UPDATE_ON_SET is not set
+CONFIG_SUPPORT_RAW_INITRD=y
+# CONFIG_DISPLAY_CPUINFO is not set
+CONFIG_HUSH_PARSER=y
+CONFIG_SYS_PROMPT="u-boot> "
+CONFIG_SYS_XTRACE="n"
+# CONFIG_CMD_SOURCE is not set
+CONFIG_OF_CONTROL=y
+CONFIG_DEFAULT_DEVICE_TREE="ns3-board"
+CONFIG_DM=y
+CONFIG_DM_SERIAL=y
+CONFIG_SYS_NS16550=y

include/configs/bcm_ns3.h

@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2020 Broadcom.
+ *
+ */
+
+#ifndef __BCM_NS3_H
+#define __BCM_NS3_H
+
+#include <linux/sizes.h>
+
+#define CONFIG_HOSTNAME			"NS3"
+
+/* Physical Memory Map */
+#define V2M_BASE			0x80000000
+#define PHYS_SDRAM_1			V2M_BASE
+
+#define CONFIG_SYS_SDRAM_BASE		PHYS_SDRAM_1
+#define CONFIG_SYS_LOAD_ADDR		(PHYS_SDRAM_1 + 0x80000)
+
+/*
+ * Initial SP before reloaction is placed at end of first DRAM bank,
+ * which is 0x1_0000_0000.
+ * Just before re-loaction, new SP is updated and re-location happens.
+ * So pointing the initial SP to end of 2GB DDR is not a problem
+ */
+#define CONFIG_SYS_INIT_SP_ADDR		(PHYS_SDRAM_1 + 0x80000000)
+/* 12MB Malloc size */
+#define CONFIG_SYS_MALLOC_LEN		(SZ_8M + SZ_4M)
+
+/* console configuration */
+#define CONFIG_SYS_NS16550_CLK		25000000
+
+#define CONFIG_SYS_CBSIZE		SZ_1K
+#define CONFIG_SYS_PBSIZE		(CONFIG_SYS_CBSIZE + \
+					 sizeof(CONFIG_SYS_PROMPT) + 16)
+#define CONFIG_SYS_MAXARGS		64
+#define CONFIG_SYS_BARGSIZE		CONFIG_SYS_CBSIZE
+
+#endif /* __BCM_NS3_H */