arm: add support for Hisilicon HiSTB family SoCs

First supported chip is hi3798mv200 (which is similar to Hi3798cv200
used by poplar).

Signed-off-by: Yang Xiwen <forbidden405@outlook.com>

MAINTAINERS

@@ -291,6 +291,7 @@ S:	Maintained
 F:	arch/arm/cpu/armv8/hisilicon
 F:	arch/arm/include/asm/arch-hi6220/
 F:	arch/arm/include/asm/arch-hi3660/
+F:	arch/arm/mach-histb
 
 ARM HPE GXP ARCHITECTURE
 M:	Jean-Marie Verdun <verdun@hpe.com>

arch/arm/Kconfig

@@ -578,6 +578,16 @@ config ARCH_DAVINCI
 	help
 	  Support for TI's DaVinci platform.
 
+config ARCH_HISTB
+	bool "Hisilicon HiSTB SoCs"
+	select DM
+	select DM_SERIAL
+	select OF_CONTROL
+	select PL01X_SERIAL
+	imply CMD_DM
+	help
+	  Support for HiSTB SoCs.
+
 config ARCH_KIRKWOOD
 	bool "Marvell Kirkwood"
 	select ARCH_MISC_INIT
@@ -2174,6 +2184,8 @@ source "arch/arm/mach-hpe/gxp/Kconfig"
 
 source "arch/arm/mach-highbank/Kconfig"
 
+source "arch/arm/mach-histb/Kconfig"
+
 source "arch/arm/mach-integrator/Kconfig"
 
 source "arch/arm/mach-ipq40xx/Kconfig"

arch/arm/Makefile

@@ -61,6 +61,7 @@ machine-$(CONFIG_ARCH_DAVINCI)		+= davinci
 machine-$(CONFIG_ARCH_EXYNOS)		+= exynos
 machine-$(CONFIG_ARCH_GXP)		+= hpe
 machine-$(CONFIG_ARCH_HIGHBANK)		+= highbank
+machine-$(CONFIG_ARCH_HISTB)		+= histb
 machine-$(CONFIG_ARCH_IPQ40XX)		+= ipq40xx
 machine-$(CONFIG_ARCH_K3)		+= k3
 machine-$(CONFIG_ARCH_KEYSTONE)		+= keystone

arch/arm/mach-histb/Kconfig

@@ -0,0 +1,14 @@
+if ARCH_HISTB
+
+choice
+	prompt "Select a HiSTB SoC"
+
+config ARCH_HI3798MV2X
+	bool "Hi3798M V2XX series SoC"
+	select ARM64
+	help
+	  Support for Hi3798MV2XX series SoCs.
+
+endchoice
+
+endif

arch/arm/mach-histb/Makefile

@@ -0,0 +1,4 @@
+# SPDX-License-Identifier:	GPL-2.0+
+
+obj-y += sysmap-histb.o
+obj-y += board_common.o

arch/arm/mach-histb/board_common.c

@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Board init file for all histb boards
+ *
+ * (C) Copyright 2023 Yang Xiwen <forbidden405@outlook.com>
+ */
+
+#include <common.h>
+#include <fdtdec.h>
+#include <init.h>
+#include <asm/system.h>
+
+int __weak board_init(void)
+{
+	return 0;
+}
+
+int __weak dram_init_banksize(void)
+{
+	return fdtdec_setup_memory_banksize();
+}
+
+int __weak dram_init(void)
+{
+	return fdtdec_setup_mem_size_base();
+}
+
+void __weak reset_cpu(void)
+{
+	psci_system_reset();
+}

arch/arm/mach-histb/sysmap-histb.c

@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Hisilicon HiSTB memory map
+ *
+ * (C) Copyright 2023 Yang Xiwen <forbidden405@outlook.com>
+ */
+
+#include <common.h>
+#include <asm/armv8/mmu.h>
+
+static struct mm_region histb_mem_map[] = {
+	{
+		.virt = 0x0UL, /* DRAM */
+		.phys = 0x0UL,
+		.size = 0x80000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+			 PTE_BLOCK_INNER_SHARE
+	}, {
+		.virt = 0x80000000UL, /* Peripheral block */
+		.phys = 0x80000000UL,
+		.size = 0x80000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+			 PTE_BLOCK_NON_SHARE |
+			 PTE_BLOCK_PXN | PTE_BLOCK_UXN
+	}, {
+		/* Terminator */
+		0,
+	}
+};
+
+struct mm_region *mem_map = histb_mem_map;