arm: rmobile: Add basic support for Renesas R-Mobile

This patch adds minimum support for R-Mobile. Only minimal support with timer.
This CPU can uses the peripheral of Renesas SuperH.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

arch/arm/cpu/armv7/rmobile/Makefile

@@ -0,0 +1,48 @@
+#
+# (C) Copyright 2000-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+include $(TOPDIR)/config.mk
+
+LIB	= $(obj)lib$(SOC).o
+
+COBJS += cpu_info.o
+COBJS += timer.o
+
+SRCS	:= $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS) $(COBJS-y))
+START	:= $(addprefix $(obj),$(START))
+
+all:	$(obj).depend $(LIB)
+
+$(LIB):	$(OBJS)
+	$(call cmd_link_o_target, $(OBJS))
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
+

arch/arm/cpu/armv7/rmobile/cpu_info.c

@@ -0,0 +1,74 @@
+/*
+ * (C) Copyright 2012 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
+ * (C) Copyright 2012 Renesas Solutions Corp.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/rmobile.h>
+
+#ifdef CONFIG_ARCH_CPU_INIT
+int arch_cpu_init(void)
+{
+	icache_enable();
+	return 0;
+}
+#endif
+
+#ifndef CONFIG_SYS_DCACHE_OFF
+void enable_caches(void)
+{
+	dcache_enable();
+}
+#endif
+
+#ifdef CONFIG_DISPLAY_CPUINFO
+static u32 get_cpu_type(void)
+{
+	u32 id;
+	u32 type;
+
+	id = readl(CCCR);
+	type = (id >> 8) & 0xFF;
+
+	return type;
+}
+
+static u32 get_cpu_rev(void)
+{
+	u32 id;
+	u32 rev;
+
+	id = readl(CCCR);
+	rev = (id >> 4) & 0xF;
+
+	return rev;
+}
+
+int print_cpuinfo(void)
+{
+	switch (get_cpu_type()) {
+	default:
+		printf("CPU: Renesas Electronics CPU rev %d\n", get_cpu_rev());
+		break;
+	}
+	return 0;
+}
+#endif

arch/arm/cpu/armv7/rmobile/timer.c

@@ -0,0 +1,97 @@
+/*
+ * (C) Copyright 2012 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
+ * (C) Copyright 2012 Renesas Solutions Corp.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch-armv7/globaltimer.h>
+#include <asm/arch/rmobile.h>
+
+static struct globaltimer *global_timer = \
+		(struct globaltimer *)GLOBAL_TIMER_BASE_ADDR;
+
+#define CLK2MHZ(clk)	(clk / 1000 / 1000)
+static u64 get_cpu_global_timer(void)
+{
+	u32 low, high;
+	u64 timer;
+
+	u32 old = readl(&global_timer->cnt_h);
+	while (1) {
+		low = readl(&global_timer->cnt_l);
+		high = readl(&global_timer->cnt_h);
+		if (old == high)
+			break;
+		else
+			old = high;
+	}
+
+	timer = high;
+	return (u64)((timer << 32) | low);
+}
+
+static u64 get_time_us(void)
+{
+	u64 timer = get_cpu_global_timer();
+
+	timer = ((timer << 2) + (CLK2MHZ(CONFIG_SYS_CPU_CLK) >> 1));
+	timer /= (u64)CLK2MHZ(CONFIG_SYS_CPU_CLK);
+	return timer;
+}
+
+static ulong get_time_ms(void)
+{
+	return (ulong)(get_time_us() / 1000);
+}
+
+int timer_init(void)
+{
+	writel(0x01, &global_timer->ctl);
+	return 0;
+}
+
+void __udelay(unsigned long usec)
+{
+	u64 start, current;
+	u64 wait;
+
+	start = get_cpu_global_timer();
+	wait = (u64)((usec * CLK2MHZ(CONFIG_SYS_CPU_CLK)) >> 2);
+	do {
+		current = get_cpu_global_timer();
+	} while ((current - start) < wait);
+}
+
+ulong get_timer(ulong base)
+{
+	return get_time_ms() - base;
+}
+
+unsigned long long get_ticks(void)
+{
+	return get_cpu_global_timer();
+}
+
+ulong get_tbclk(void)
+{
+	return (ulong)(CONFIG_SYS_CPU_CLK >> 2);
+}

arch/arm/include/asm/arch-rmobile/rmobile.h

@@ -0,0 +1,8 @@
+#ifndef __ASM_ARCH_RMOBILE_H
+#define __ASM_ARCH_RMOBILE_H
+
+#if defined(CONFIG_RMOBILE)
+#error "SOC Name not defined"
+#endif /* CONFIG_RMOBILE */
+
+#endif /* __ASM_ARCH_RMOBILE_H */