From e39448e8be8389f5ddeabae0ec9c6a3b7b8a2ca6 Mon Sep 17 00:00:00 2001
From: Thomas Abraham <thomas.ab@samsung.com>
Date: Sat, 23 Apr 2016 22:18:13 +0530
Subject: arm: exynos: add support for Exynos7420 SoC

Add support for Exynos7420 SoC. The Exynos7420 SoC has four Cortex-A57
and four Cortex-A53 CPUs and includes various peripheral controllers.

Signed-off-by: Thomas Abraham <thomas.ab@samsung.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
---
 arch/arm/mach-exynos/Kconfig     |  8 ++++++++
 arch/arm/mach-exynos/Makefile    |  1 +
 arch/arm/mach-exynos/mmu-arm64.c | 35 +++++++++++++++++++++++++++++++++++
 arch/arm/mach-exynos/soc.c       |  8 ++++++++
 4 files changed, 52 insertions(+)
 create mode 100644 arch/arm/mach-exynos/mmu-arm64.c

(limited to 'arch/arm/mach-exynos')

diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
index 28a6a60..0a6cb33 100644
--- a/arch/arm/mach-exynos/Kconfig
+++ b/arch/arm/mach-exynos/Kconfig
@@ -20,6 +20,14 @@ config ARCH_EXYNOS5
 	  Cortex-A7 CPU in big.LITTLE configuration). There are multiple SoCs
 	  in this family including Exynos5250, Exynos5420 and Exynos5800.
 
+config ARCH_EXYNOS7
+	bool "Exynos7 SoC family"
+	select ARM64
+	help
+	  Samsung Exynos7 SoC family are based on ARM Cortex-A57 CPU or
+	  Cortex-A53 CPU (and some in a big.LITTLE configuration). There are
+	  multiple SoCs in this family including Exynos7420.
+
 endchoice
 
 if ARCH_EXYNOS4
diff --git a/arch/arm/mach-exynos/Makefile b/arch/arm/mach-exynos/Makefile
index f3c07b7..0cc6c32 100644
--- a/arch/arm/mach-exynos/Makefile
+++ b/arch/arm/mach-exynos/Makefile
@@ -7,6 +7,7 @@
 
 obj-y	+= soc.o
 obj-$(CONFIG_CPU_V7) += clock.o pinmux.o power.o system.o
+obj-$(CONFIG_ARM64)	+= mmu-arm64.o
 
 obj-$(CONFIG_EXYNOS5420)	+= sec_boot.o
 
diff --git a/arch/arm/mach-exynos/mmu-arm64.c b/arch/arm/mach-exynos/mmu-arm64.c
new file mode 100644
index 0000000..ba6d99d
--- /dev/null
+++ b/arch/arm/mach-exynos/mmu-arm64.c
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2016 Samsung Electronics
+ * Thomas Abraham <thomas.ab@samsung.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/armv8/mmu.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_EXYNOS7420
+static struct mm_region exynos7420_mem_map[] = {
+	{
+		.base	= 0x10000000UL,
+		.size	= 0x10000000UL,
+		.attrs	= PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+				PTE_BLOCK_NON_SHARE |
+				PTE_BLOCK_PXN | PTE_BLOCK_UXN,
+	}, {
+		.base	= 0x40000000UL,
+		.size	= 0x80000000UL,
+		.attrs	= PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+				PTE_BLOCK_INNER_SHARE,
+	}, {
+		/* List terminator */
+		.base	= 0,
+		.size	= 0,
+		.attrs	= 0,
+	},
+};
+
+struct mm_region *mem_map = exynos7420_mem_map;
+#endif
diff --git a/arch/arm/mach-exynos/soc.c b/arch/arm/mach-exynos/soc.c
index 737a8dd..f9c7468 100644
--- a/arch/arm/mach-exynos/soc.c
+++ b/arch/arm/mach-exynos/soc.c
@@ -23,3 +23,11 @@ void enable_caches(void)
 	dcache_enable();
 }
 #endif
+
+#ifdef CONFIG_ARM64
+void lowlevel_init(void)
+{
+	armv8_switch_to_el2();
+	armv8_switch_to_el1();
+}
+#endif
-- 
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