diff options
author | Nobuhiro Iwamatsu <iwamatsu@nigauri.org> | 2015-10-09 16:40:09 +0900 |
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committer | Nobuhiro Iwamatsu <iwamatsu@nigauri.org> | 2016-08-17 10:25:28 +0900 |
commit | badbb63c2c29738a2956504126a30ddb14ca34c1 (patch) | |
tree | 29cb6dbc3cf6b34944b987e0a3619776905a59aa /arch/arm/mach-rmobile/timer.c | |
parent | 59d07ee08e858bf2c121d0cdc6c8ddd3b26ee5b1 (diff) |
ARM: rmobile: Move SoC sources to mach-rmobile
Move from arch/arm/cpu/armv7/rmobile/ to arch/arm/mach-rmobile/.
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Diffstat (limited to 'arch/arm/mach-rmobile/timer.c')
-rw-r--r-- | arch/arm/mach-rmobile/timer.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/arch/arm/mach-rmobile/timer.c b/arch/arm/mach-rmobile/timer.c new file mode 100644 index 00000000000..04700e7d34d --- /dev/null +++ b/arch/arm/mach-rmobile/timer.c @@ -0,0 +1,85 @@ +/* + * (C) Copyright 2012 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com> + * (C) Copyright 2012 Renesas Solutions Corp. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <div64.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)); + do_div(timer, CLK2MHZ(CONFIG_SYS_CPU_CLK)); + return timer; +} + +static ulong get_time_ms(void) +{ + u64 us = get_time_us(); + + do_div(us, 1000); + return us; +} + +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); +} |