diff options
| -rw-r--r-- | arch/arm/cpu/armv7/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/arch_timer.c | 58 |
2 files changed, 59 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/Makefile b/arch/arm/cpu/armv7/Makefile index 119ebb3..ab869b1 100644 --- a/arch/arm/cpu/armv7/Makefile +++ b/arch/arm/cpu/armv7/Makefile @@ -25,6 +25,7 @@ endif obj-$(CONFIG_KONA) += kona-common/ obj-$(CONFIG_OMAP_COMMON) += omap-common/ +obj-$(CONFIG_SYS_ARCH_TIMER) += arch_timer.o obj-$(CONFIG_TEGRA) += tegra-common/ ifneq (,$(filter s5pc1xx exynos,$(SOC))) diff --git a/arch/arm/cpu/armv7/arch_timer.c b/arch/arm/cpu/armv7/arch_timer.c new file mode 100644 index 0000000..0588e2b --- /dev/null +++ b/arch/arm/cpu/armv7/arch_timer.c @@ -0,0 +1,58 @@ +/* + * (C) Copyright 2012-2014 + * Texas Instruments Incorporated, <www.ti.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <div64.h> + +DECLARE_GLOBAL_DATA_PTR; + +int timer_init(void) +{ + gd->arch.tbl = 0; + gd->arch.tbu = 0; + + gd->arch.timer_rate_hz = CONFIG_SYS_HZ_CLOCK / CONFIG_SYS_HZ; + + return 0; +} + +unsigned long long get_ticks(void) +{ + ulong nowl, nowu; + + asm volatile("mrrc p15, 0, %0, %1, c14" : "=r" (nowl), "=r" (nowu)); + + gd->arch.tbl = nowl; + gd->arch.tbu = nowu; + + return (((unsigned long long)gd->arch.tbu) << 32) | gd->arch.tbl; +} + + +ulong get_timer(ulong base) +{ + return lldiv(get_ticks(), gd->arch.timer_rate_hz) - base; +} + +void __udelay(unsigned long usec) +{ + unsigned long long endtime; + + endtime = lldiv((unsigned long long)usec * gd->arch.timer_rate_hz, + 1000UL); + + endtime += get_ticks(); + + while (get_ticks() < endtime) + ; +} + +ulong get_tbclk(void) +{ + return gd->arch.timer_rate_hz; +} |