diff options
Diffstat (limited to 'qemu/roms/u-boot/arch/arm/cpu/armv7/s5p-common/timer.c')
-rw-r--r-- | qemu/roms/u-boot/arch/arm/cpu/armv7/s5p-common/timer.c | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/qemu/roms/u-boot/arch/arm/cpu/armv7/s5p-common/timer.c b/qemu/roms/u-boot/arch/arm/cpu/armv7/s5p-common/timer.c deleted file mode 100644 index 949abb1c8..000000000 --- a/qemu/roms/u-boot/arch/arm/cpu/armv7/s5p-common/timer.c +++ /dev/null @@ -1,132 +0,0 @@ -/* - * Copyright (C) 2009 Samsung Electronics - * Heungjun Kim <riverful.kim@samsung.com> - * Inki Dae <inki.dae@samsung.com> - * Minkyu Kang <mk7.kang@samsung.com> - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <div64.h> -#include <asm/io.h> -#include <asm/arch/pwm.h> -#include <asm/arch/clk.h> -#include <pwm.h> - -DECLARE_GLOBAL_DATA_PTR; - -unsigned long get_current_tick(void); - -/* macro to read the 16 bit timer */ -static inline struct s5p_timer *s5p_get_base_timer(void) -{ - return (struct s5p_timer *)samsung_get_base_timer(); -} - -/** - * Read the countdown timer. - * - * This operates at 1MHz and counts downwards. It will wrap about every - * hour (2^32 microseconds). - * - * @return current value of timer - */ -static unsigned long timer_get_us_down(void) -{ - struct s5p_timer *const timer = s5p_get_base_timer(); - - return readl(&timer->tcnto4); -} - -int timer_init(void) -{ - /* PWM Timer 4 */ - pwm_init(4, MUX_DIV_4, 0); - pwm_config(4, 100000, 100000); - pwm_enable(4); - - /* Use this as the current monotonic time in us */ - gd->arch.timer_reset_value = 0; - - /* Use this as the last timer value we saw */ - gd->arch.lastinc = timer_get_us_down(); - reset_timer_masked(); - - return 0; -} - -/* - * timer without interrupts - */ -unsigned long get_timer(unsigned long base) -{ - unsigned long long time_ms; - - ulong now = timer_get_us_down(); - - /* - * Increment the time by the amount elapsed since the last read. - * The timer may have wrapped around, but it makes no difference to - * our arithmetic here. - */ - gd->arch.timer_reset_value += gd->arch.lastinc - now; - gd->arch.lastinc = now; - - /* Divide by 1000 to convert from us to ms */ - time_ms = gd->arch.timer_reset_value; - do_div(time_ms, 1000); - return time_ms - base; -} - -unsigned long __attribute__((no_instrument_function)) timer_get_us(void) -{ - static unsigned long base_time_us; - - struct s5p_timer *const timer = - (struct s5p_timer *)samsung_get_base_timer(); - unsigned long now_downward_us = readl(&timer->tcnto4); - - if (!base_time_us) - base_time_us = now_downward_us; - - /* Note that this timer counts downward. */ - return base_time_us - now_downward_us; -} - -/* delay x useconds */ -void __udelay(unsigned long usec) -{ - unsigned long count_value; - - count_value = timer_get_us_down(); - while ((int)(count_value - timer_get_us_down()) < (int)usec) - ; -} - -void reset_timer_masked(void) -{ - struct s5p_timer *const timer = s5p_get_base_timer(); - - /* reset time */ - gd->arch.lastinc = readl(&timer->tcnto4); - gd->arch.tbl = 0; -} - -/* - * This function is derived from PowerPC code (read timebase as long long). - * On ARM it just returns the timer value. - */ -unsigned long long get_ticks(void) -{ - return get_timer(0); -} - -/* - * This function is derived from PowerPC code (timebase clock frequency). - * On ARM it returns the number of timer ticks per second. - */ -unsigned long get_tbclk(void) -{ - return CONFIG_SYS_HZ; -} |