ARM: meson: add A1 support

Add support for Amlogic A1 SoC family.

Signed-off-by: Igor Prusov <ivprusov@sberdevices.ru>
Signed-off-by: Evgeny Bachinin <eabachinin@sberdevices.ru>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230505125639.3605-4-ivprusov@sberdevices.ru
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>

arch/arm/include/asm/arch-meson/a1.h

@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2023 SberDevices, Inc.
+ * Author: Igor Prusov <ivprusov@sberdevices.ru>
+ */
+
+#ifndef __MESON_A1_H__
+#define __MESON_A1_H__
+
+#define A1_SYSCTRL_BASE			0xfe005800
+
+/* SYSCTRL registers */
+#define A1_SYSCTRL_ADDR(off)		(A1_SYSCTRL_BASE + ((off) << 2))
+
+#define A1_SYSCTRL_SEC_STATUS_REG4	A1_SYSCTRL_ADDR(0xc4)
+
+#define A1_SYSCTRL_MEM_SIZE_MASK	0xFFFF0000
+#define A1_SYSCTRL_MEM_SIZE_SHIFT	16
+
+#endif /* __MESON_A1_H__ */

arch/arm/mach-meson/Kconfig

@@ -51,6 +51,12 @@ config MESON_G12A
 	help
 	  Select this if your SoC is an S905X/D2
 
+config MESON_A1
+	bool "A1"
+	select MESON64_COMMON
+	help
+	  Select this if your SoC is an A113L
+
 endchoice
 
 config SYS_SOC

arch/arm/mach-meson/Makefile

@@ -6,3 +6,4 @@ obj-y += board-common.o sm.o board-info.o
 obj-$(CONFIG_MESON_GX) += board-gx.o
 obj-$(CONFIG_MESON_AXG) += board-axg.o
 obj-$(CONFIG_MESON_G12A) += board-g12a.o
+obj-$(CONFIG_MESON_A1) += board-a1.o

arch/arm/mach-meson/board-a1.c

@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2023 SberDevices, Inc.
+ */
+
+#include <common.h>
+#include <asm/arch/a1.h>
+#include <asm/arch/boot.h>
+#include <asm/armv8/mmu.h>
+#include <asm/io.h>
+#include <linux/compiler.h>
+#include <linux/sizes.h>
+
+phys_size_t get_effective_memsize(void)
+{
+	return ((readl(A1_SYSCTRL_SEC_STATUS_REG4) & A1_SYSCTRL_MEM_SIZE_MASK)
+		>> A1_SYSCTRL_MEM_SIZE_SHIFT) * SZ_1M;
+}
+
+void meson_init_reserved_memory(__maybe_unused void *fdt)
+{
+}
+
+int meson_get_boot_device(void)
+{
+	return -ENOSYS;
+}
+
+static struct mm_region a1_mem_map[] = {
+	{
+		.virt = 0x00000000UL,
+		.phys = 0x00000000UL,
+		.size = 0x80000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+			PTE_BLOCK_INNER_SHARE
+	}, {
+		.virt = 0x80000000UL,
+		.phys = 0x80000000UL,
+		.size = 0x7FE00000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+			PTE_BLOCK_NON_SHARE |
+			PTE_BLOCK_PXN | PTE_BLOCK_UXN
+	}, {
+		/*
+		 * This mem region contains in/out shared memory with bl31,
+		 * hence it's marked as NORMAL memory type
+		 */
+		.virt = 0xFFE00000UL,
+		.phys = 0xFFE00000UL,
+		.size = 0x00200000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+			PTE_BLOCK_INNER_SHARE
+	}, {
+		/* List terminator */
+		0,
+	}
+};
+
+struct mm_region *mem_map = a1_mem_map;

include/configs/meson64.h

@@ -11,6 +11,9 @@
 #if (defined(CONFIG_MESON_AXG) || defined(CONFIG_MESON_G12A))
 #define GICD_BASE			0xffc01000
 #define GICC_BASE			0xffc02000
+#elif defined(CONFIG_MESON_A1)
+#define GICD_BASE			0xff901000
+#define GICC_BASE			0xff902000
 #else /* MESON GXL and GXBB */
 #define GICD_BASE			0xc4301000
 #define GICC_BASE			0xc4302000