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Diffstat (limited to 'cpu/arm1136/omap24xx/interrupts.c')
| -rwxr-xr-x | cpu/arm1136/omap24xx/interrupts.c | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/cpu/arm1136/omap24xx/interrupts.c b/cpu/arm1136/omap24xx/interrupts.c deleted file mode 100755 index 8503b24..0000000 --- a/cpu/arm1136/omap24xx/interrupts.c +++ /dev/null @@ -1,180 +0,0 @@ -/* - * (C) Copyright 2004 - * Texas Instruments - * Richard Woodruff <r-woodruff2@ti.com> - * - * (C) Copyright 2002 - * Sysgo Real-Time Solutions, GmbH <www.elinos.com> - * Marius Groeger <mgroeger@sysgo.de> - * Alex Zuepke <azu@sysgo.de> - * - * (C) Copyright 2002 - * Gary Jennejohn, DENX Software Engineering, <gj@denx.de> - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -#include <common.h> -#include <asm/arch/bits.h> -#include <asm/arch/omap2420.h> - -#define TIMER_LOAD_VAL 0 - -/* macro to read the 32 bit timer */ -#define READ_TIMER (*((volatile ulong*)(CFG_TIMERBASE+TCRR))) - -static ulong timestamp; -static ulong lastinc; - -/* - * nothing really to do with interrupts, just starts up a counter. - */ -int interrupt_init(void) -{ - int32_t val; - - /* Start the counter ticking up */ - /* reload value on overflow*/ - *((int32_t *) (CFG_TIMERBASE + TLDR)) = TIMER_LOAD_VAL; - /* mask to enable timer*/ - val = (CFG_PVT << 2) | BIT5 | BIT1 | BIT0; - *((int32_t *) (CFG_TIMERBASE + TCLR)) = val; /* start timer */ - - reset_timer_masked(); /* init the timestamp and lastinc value */ - - return(0); -} -/* - * timer without interrupts - */ -void reset_timer(void) -{ - reset_timer_masked(); -} - -ulong get_timer(ulong base) -{ - return get_timer_masked() - base; -} - -void set_timer(ulong t) -{ - timestamp = t; -} - -/* delay x useconds AND perserve advance timstamp value */ -void udelay(unsigned long usec) -{ - ulong tmo, tmp; - - /* if "big" number, spread normalization to seconds */ - if (usec >= 1000) { - /* start to normalize for usec to ticks per sec */ - tmo = usec / 1000; - /* find number of "ticks" to wait to achieve target */ - tmo *= CFG_HZ; - /* finish normalize. */ - tmo /= 1000; - } else { - /* else small number, don't kill it prior to HZ multiply */ - tmo = usec * CFG_HZ; - tmo /= (1000*1000); - } - /* get current timestamp */ - tmp = get_timer(0); - if ((tmo + tmp + 1) < tmp) - /* setting this forward will roll time stamp */ - /* reset "advancing" timestamp to 0, set lastinc value */ - reset_timer_masked(); - else - /* else, set advancing stamp wake up time */ - tmo += tmp; - while (get_timer_masked() < tmo)/* loop till event */ - /*NOP*/; -} - -void reset_timer_masked(void) -{ - /* reset time */ - /* capture current incrementer value time */ - lastinc = READ_TIMER; - /* start "advancing" time stamp from 0 */ - timestamp = 0; -} - -ulong get_timer_masked(void) -{ - ulong now = READ_TIMER; /* current tick value */ - - /* normal mode (non roll) */ - if (now >= lastinc) - /* move stamp forward with absolute diff ticks */ - timestamp += (now - lastinc); - else - /* we have rollover of incrementer */ - timestamp += (0xFFFFFFFF - lastinc) + now; - lastinc = 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) { - /* "big" number, spread normalization to seconds */ - /* start to normalize for usec to ticks per sec */ - tmo = usec / 1000; - /* find number of "ticks" to wait to achieve target */ - tmo *= CFG_HZ; - tmo /= 1000;/* finish normalize. */ - } else { - /* else small number, don't kill it prior to HZ multiply */ - tmo = usec * CFG_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) -{ - ulong tbclk; - tbclk = CFG_HZ; - return tbclk; -} |