ARM: rmobile: Add support R-Car Generation 3

This adds supporting R-Car Generation 3 (Gen3) as Renesas ARM64 SoC.

Signed-off-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

4 files changed, 193 insertions, 0 deletions

diff --git a/arch/arm/mach-rmobile/Kconfig b/arch/arm/mach-rmobile/Kconfig
index 56c3f68..4b05d78 100644
--- a/arch/arm/mach-rmobile/Kconfig
+++ b/arch/arm/mach-rmobile/Kconfig
@@ -8,8 +8,13 @@ config RCAR_32
 	bool "Renesas ARM SoCs R-Car Gen1/Gen2 (32bit)"
 	select CPU_V7
 
+config RCAR_GEN3
+	bool "Renesas ARM SoCs R-Car Gen3 (64bit)"
+	select ARM64
+
 endchoice
 
 source "arch/arm/mach-rmobile/Kconfig.32"
+source "arch/arm/mach-rmobile/Kconfig.64"
 
 endif
diff --git a/arch/arm/mach-rmobile/Kconfig.64 b/arch/arm/mach-rmobile/Kconfig.64
new file mode 100644
index 0000000..af1a76a
--- /dev/null
+++ b/arch/arm/mach-rmobile/Kconfig.64
@@ -0,0 +1,12 @@
+if RCAR_GEN3
+
+choice
+	prompt "Renesus ARM64 SoCs board select"
+	optional
+
+endchoice
+
+config SYS_SOC
+	default "rmobile"
+
+endif
diff --git a/arch/arm/mach-rmobile/include/mach/rcar-gen3-base.h b/arch/arm/mach-rmobile/include/mach/rcar-gen3-base.h
new file mode 100644
index 0000000..fbd87c4
--- /dev/null
+++ b/arch/arm/mach-rmobile/include/mach/rcar-gen3-base.h
@@ -0,0 +1,100 @@
+/*
+ * ./arch/arm/mach-rmobile/include/mach/rcar-gen3-base.h
+ *
+ * Copyright (C) 2015 Renesas Electronics Corporation
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __ASM_ARCH_RCAR_GEN3_BASE_H
+#define __ASM_ARCH_RCAR_GEN3_BASE_H
+
+/*
+ * R-Car (R8A7750) I/O Addresses
+ */
+#define RWDT_BASE		0xE6020000
+#define SWDT_BASE		0xE6030000
+#define LBSC_BASE		0xEE220200
+#define TMU_BASE		0xE61E0000
+#define GPIO5_BASE		0xE6055000
+
+/* SCIF */
+#define SCIF0_BASE		0xE6E60000
+#define SCIF1_BASE		0xE6E68000
+#define SCIF2_BASE		0xE6E88000
+#define SCIF3_BASE		0xE6C50000
+#define SCIF4_BASE		0xE6C40000
+#define SCIF5_BASE		0xE6F30000
+
+/* Module stop status register */
+#define MSTPSR0			0xE6150030
+#define MSTPSR1			0xE6150038
+#define MSTPSR2			0xE6150040
+#define MSTPSR3			0xE6150048
+#define MSTPSR4			0xE615004C
+#define MSTPSR5			0xE615003C
+#define MSTPSR6			0xE61501C0
+#define MSTPSR7			0xE61501C4
+#define MSTPSR8			0xE61509A0
+#define MSTPSR9			0xE61509A4
+#define MSTPSR10		0xE61509A8
+#define MSTPSR11		0xE61509AC
+
+/* Realtime module stop control register */
+#define RMSTPCR0		0xE6150110
+#define RMSTPCR1		0xE6150114
+#define RMSTPCR2		0xE6150118
+#define RMSTPCR3		0xE615011C
+#define RMSTPCR4		0xE6150120
+#define RMSTPCR5		0xE6150124
+#define RMSTPCR6		0xE6150128
+#define RMSTPCR7		0xE615012C
+#define RMSTPCR8		0xE6150980
+#define RMSTPCR9		0xE6150984
+#define RMSTPCR10		0xE6150988
+#define RMSTPCR11		0xE615098C
+
+/* System module stop control register */
+#define SMSTPCR0		0xE6150130
+#define SMSTPCR1		0xE6150134
+#define SMSTPCR2		0xE6150138
+#define SMSTPCR3		0xE615013C
+#define SMSTPCR4		0xE6150140
+#define SMSTPCR5		0xE6150144
+#define SMSTPCR6		0xE6150148
+#define SMSTPCR7		0xE615014C
+#define SMSTPCR8		0xE6150990
+#define SMSTPCR9		0xE6150994
+#define SMSTPCR10		0xE6150998
+#define SMSTPCR11		0xE615099C
+
+/* SDHI */
+#define CONFIG_SYS_SH_SDHI0_BASE	0xEE100000
+#define CONFIG_SYS_SH_SDHI1_BASE	0xEE120000
+#define CONFIG_SYS_SH_SDHI2_BASE	0xEE140000
+#define CONFIG_SYS_SH_SDHI3_BASE	0xEE160000
+
+/* PFC */
+#define PFC_PUEN6       0xE6060418
+#define PUEN_USB1_OVC   (1 << 2)
+#define PUEN_USB1_PWEN  (1 << 1)
+
+#ifndef __ASSEMBLY__
+#include <asm/types.h>
+
+/* RWDT */
+struct rcar_rwdt {
+	u32 rwtcnt;
+	u32 rwtcsra;
+	u32 rwtcsrb;
+};
+
+/* SWDT */
+struct rcar_swdt {
+	u32 swtcnt;
+	u32 swtcsra;
+	u32 swtcsrb;
+};
+#endif
+
+#endif /* __ASM_ARCH_RCAR_GEN3_BASE_H */
diff --git a/arch/arm/mach-rmobile/lowlevel_init_gen3.S b/arch/arm/mach-rmobile/lowlevel_init_gen3.S
new file mode 100644
index 0000000..88ff56e
--- /dev/null
+++ b/arch/arm/mach-rmobile/lowlevel_init_gen3.S
@@ -0,0 +1,76 @@
+/*
+ * arch/arm/cpu/armv8/rcar_gen3/lowlevel_init.S
+ *	This file is lowlevel initialize routine.
+ *
+ * (C) Copyright 2015 Renesas Electronics Corporation
+ *
+ * This file is based on the arch/arm/cpu/armv8/start.S
+ *
+ * (C) Copyright 2013
+ * David Feng <fenghua@phytium.com.cn>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <asm-offsets.h>
+#include <config.h>
+#include <linux/linkage.h>
+#include <asm/macro.h>
+
+ENTRY(lowlevel_init)
+	mov	x29, lr			/* Save LR */
+
+#ifndef CONFIG_ARMV8_MULTIENTRY
+	/*
+	 * For single-entry systems the lowlevel init is very simple.
+	 */
+	ldr	x0, =GICD_BASE
+	bl	gic_init_secure
+
+#else /* CONFIG_ARMV8_MULTIENTRY is set */
+
+#if defined(CONFIG_GICV2) || defined(CONFIG_GICV3)
+	branch_if_slave x0, 1f
+	ldr	x0, =GICD_BASE
+	bl	gic_init_secure
+1:
+#if defined(CONFIG_GICV3)
+	ldr	x0, =GICR_BASE
+	bl	gic_init_secure_percpu
+#elif defined(CONFIG_GICV2)
+	ldr	x0, =GICD_BASE
+	ldr	x1, =GICC_BASE
+	bl	gic_init_secure_percpu
+#endif
+#endif
+
+	branch_if_master x0, x1, 2f
+
+	/*
+	 * Slave should wait for master clearing spin table.
+	 * This sync prevent salves observing incorrect
+	 * value of spin table and jumping to wrong place.
+	 */
+#if defined(CONFIG_GICV2) || defined(CONFIG_GICV3)
+#ifdef CONFIG_GICV2
+	ldr	x0, =GICC_BASE
+#endif
+	bl	gic_wait_for_interrupt
+#endif
+
+	/*
+	 * All slaves will enter EL2 and optionally EL1.
+	 */
+	bl	armv8_switch_to_el2
+#ifdef CONFIG_ARMV8_SWITCH_TO_EL1
+	bl	armv8_switch_to_el1
+#endif
+
+#endif /* CONFIG_ARMV8_MULTIENTRY */
+
+	bl      s_init
+
+2:
+	mov	lr, x29			/* Restore LR */
+	ret
+ENDPROC(lowlevel_init)