From: Nobuhiro Iwamatsu Date: Wed, 13 Jun 2012 07:29:47 +0000 (+0900) Subject: arm: rmobile: Add basic support for Renesas R-Mobile X-Git-Tag: v2012.10-rc3~10^2~51 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=4fb44e22ec3ddc48b730865cf2c00e98224cee99;p=oweals%2Fu-boot.git 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 Signed-off-by: Nobuhiro Iwamatsu --- diff --git a/arch/arm/cpu/armv7/rmobile/Makefile b/arch/arm/cpu/armv7/rmobile/Makefile new file mode 100644 index 0000000000..e7eb90f461 --- /dev/null +++ b/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 + +######################################################################### + diff --git a/arch/arm/cpu/armv7/rmobile/cpu_info.c b/arch/arm/cpu/armv7/rmobile/cpu_info.c new file mode 100644 index 0000000000..789c2c3145 --- /dev/null +++ b/arch/arm/cpu/armv7/rmobile/cpu_info.c @@ -0,0 +1,74 @@ +/* + * (C) Copyright 2012 Nobuhiro Iwamatsu + * (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 +#include +#include + +#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 diff --git a/arch/arm/cpu/armv7/rmobile/timer.c b/arch/arm/cpu/armv7/rmobile/timer.c new file mode 100644 index 0000000000..37522dcd84 --- /dev/null +++ b/arch/arm/cpu/armv7/rmobile/timer.c @@ -0,0 +1,97 @@ +/* + * (C) Copyright 2012 Nobuhiro Iwamatsu + * (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 +#include +#include +#include + +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); +} diff --git a/arch/arm/include/asm/arch-rmobile/rmobile.h b/arch/arm/include/asm/arch-rmobile/rmobile.h new file mode 100644 index 0000000000..bf5e22a097 --- /dev/null +++ b/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 */