diff options
Diffstat (limited to 'arch/arm/cpu/arm925t/timer.c')
-rw-r--r-- | arch/arm/cpu/arm925t/timer.c | 104 |
1 files changed, 0 insertions, 104 deletions
diff --git a/arch/arm/cpu/arm925t/timer.c b/arch/arm/cpu/arm925t/timer.c deleted file mode 100644 index e56b576b18..0000000000 --- a/arch/arm/cpu/arm925t/timer.c +++ /dev/null @@ -1,104 +0,0 @@ -/* - * (C) Copyright 2009 - * 2N Telekomunikace, <www.2n.cz> - * - * (C) Copyright 2003 - * Texas Instruments, <www.ti.com> - * - * (C) Copyright 2002 - * Sysgo Real-Time Solutions, GmbH <www.elinos.com> - * Marius Groeger <mgroeger@sysgo.de> - * - * (C) Copyright 2002 - * Sysgo Real-Time Solutions, GmbH <www.elinos.com> - * Alex Zuepke <azu@sysgo.de> - * - * (C) Copyright 2002 - * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <arm925t.h> -#include <configs/omap1510.h> -#include <asm/io.h> - -#define TIMER_LOAD_VAL 0xffffffff -#define TIMER_CLOCK (CONFIG_SYS_CLK_FREQ / (2 << CONFIG_SYS_PTV)) - -static uint32_t timestamp; -static uint32_t lastdec; - -/* nothing really to do with interrupts, just starts up a counter. */ -int timer_init (void) -{ - /* Start the decrementer ticking down from 0xffffffff */ - __raw_writel(TIMER_LOAD_VAL, CONFIG_SYS_TIMERBASE + LOAD_TIM); - __raw_writel(MPUTIM_ST | MPUTIM_AR | MPUTIM_CLOCK_ENABLE | - (CONFIG_SYS_PTV << MPUTIM_PTV_BIT), - CONFIG_SYS_TIMERBASE + CNTL_TIMER); - - /* init the timestamp and lastdec value */ - lastdec = __raw_readl(CONFIG_SYS_TIMERBASE + READ_TIM) / - (TIMER_CLOCK / CONFIG_SYS_HZ); - timestamp = 0; /* start "advancing" time stamp from 0 */ - - return 0; -} - -/* - * timer without interrupts - */ -ulong get_timer (ulong base) -{ - return get_timer_masked () - base; -} - -/* delay x useconds AND preserve advance timestamp value */ -void __udelay (unsigned long usec) -{ - int32_t tmo = usec * (TIMER_CLOCK / 1000) / 1000; - uint32_t now, last = __raw_readl(CONFIG_SYS_TIMERBASE + READ_TIM); - - while (tmo > 0) { - now = __raw_readl(CONFIG_SYS_TIMERBASE + READ_TIM); - if (last < now) /* count down timer underflow */ - tmo -= TIMER_LOAD_VAL - now + last; - else - tmo -= last - now; - last = now; - } -} - -ulong get_timer_masked (void) -{ - uint32_t now = __raw_readl(CONFIG_SYS_TIMERBASE + READ_TIM) / - (TIMER_CLOCK / CONFIG_SYS_HZ); - if (lastdec < now) /* count down timer underflow */ - timestamp += TIMER_LOAD_VAL / (TIMER_CLOCK / CONFIG_SYS_HZ) - - now + lastdec; - else - timestamp += lastdec - now; - lastdec = now; - - return timestamp; -} - -/* - * 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. - */ -ulong get_tbclk (void) -{ - return CONFIG_SYS_HZ; -} |