diff options
Diffstat (limited to 'arch/arm/cpu/arm926ejs/omap/timer.c')
| -rw-r--r-- | arch/arm/cpu/arm926ejs/omap/timer.c | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/arch/arm/cpu/arm926ejs/omap/timer.c b/arch/arm/cpu/arm926ejs/omap/timer.c deleted file mode 100644 index b9715656c8..0000000000 --- a/arch/arm/cpu/arm926ejs/omap/timer.c +++ /dev/null @@ -1,152 +0,0 @@ -/* - * (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 2002-2004 - * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> - * - * (C) Copyright 2004 - * Philippe Robin, ARM Ltd. <philippe.robin@arm.com> - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <asm/io.h> - -#define TIMER_CLOCK (CONFIG_SYS_CLK_FREQ / (2 << CONFIG_SYS_PTV)) -#define TIMER_LOAD_VAL 0xffffffff - -/* macro to read the 32 bit timer */ -#define READ_TIMER readl(CONFIG_SYS_TIMERBASE+8) \ - / (TIMER_CLOCK / CONFIG_SYS_HZ) - -DECLARE_GLOBAL_DATA_PTR; - -#define timestamp gd->arch.tbl -#define lastdec gd->arch.lastinc - -int timer_init (void) -{ - int32_t val; - - /* Start the decrementer ticking down from 0xffffffff */ - *((int32_t *) (CONFIG_SYS_TIMERBASE + LOAD_TIM)) = TIMER_LOAD_VAL; - val = MPUTIM_ST | MPUTIM_AR | MPUTIM_CLOCK_ENABLE | (CONFIG_SYS_PTV << MPUTIM_PTV_BIT); - *((int32_t *) (CONFIG_SYS_TIMERBASE + CNTL_TIMER)) = val; - - /* init the timestamp and lastdec value */ - reset_timer_masked(); - - 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) -{ - ulong tmo, tmp; - - if(usec >= 1000){ /* if "big" number, spread normalization to seconds */ - tmo = usec / 1000; /* start to normalize for usec to ticks per sec */ - tmo *= CONFIG_SYS_HZ; /* find number of "ticks" to wait to achieve target */ - tmo /= 1000; /* finish normalize. */ - }else{ /* else small number, don't kill it prior to HZ multiply */ - tmo = usec * CONFIG_SYS_HZ; - tmo /= (1000*1000); - } - - tmp = get_timer (0); /* get current timestamp */ - if( (tmo + tmp + 1) < tmp ) /* if setting this fordward will roll time stamp */ - reset_timer_masked (); /* reset "advancing" timestamp to 0, set lastdec value */ - else - tmo += tmp; /* else, set advancing stamp wake up time */ - - while (get_timer_masked () < tmo)/* loop till event */ - /*NOP*/; -} - -void reset_timer_masked (void) -{ - /* reset time */ - lastdec = READ_TIMER; /* capure current decrementer value time */ - timestamp = 0; /* start "advancing" time stamp from 0 */ -} - -ulong get_timer_masked (void) -{ - ulong now = READ_TIMER; /* current tick value */ - - if (lastdec >= now) { /* normal mode (non roll) */ - /* normal mode */ - timestamp += lastdec - now; /* move stamp fordward with absoulte diff ticks */ - } else { /* we have overflow of the count down timer */ - /* nts = ts + ld + (TLV - now) - * ts=old stamp, ld=time that passed before passing through -1 - * (TLV-now) amount of time after passing though -1 - * nts = new "advancing time stamp"...it could also roll and cause problems. - */ - timestamp += lastdec + (TIMER_LOAD_VAL / (TIMER_CLOCK / - CONFIG_SYS_HZ)) - now; - } - lastdec = now; - - return timestamp; -} - -/* waits specified delay value and resets timestamp */ -void udelay_masked (unsigned long usec) -{ - ulong tmo; - ulong endtime; - signed long diff; - - if (usec >= 1000) { /* if "big" number, spread normalization to seconds */ - tmo = usec / 1000; /* start to normalize for usec to ticks per sec */ - tmo *= CONFIG_SYS_HZ; /* find number of "ticks" to wait to achieve target */ - tmo /= 1000; /* finish normalize. */ - } else { /* else small number, don't kill it prior to HZ multiply */ - tmo = usec * CONFIG_SYS_HZ; - tmo /= (1000*1000); - } - - endtime = get_timer_masked () + tmo; - - do { - ulong now = get_timer_masked (); - diff = endtime - now; - } while (diff >= 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. - */ -ulong get_tbclk (void) -{ - return CONFIG_SYS_HZ; -} |