X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=drv%2Ftimer.c;h=bd0ff9daed9ec26bfe5ae35ff5266917b72329b1;hb=HEAD;hp=e0208b8843675763eee70025a7cdbf850451c568;hpb=680ecaecd7ed77d044fbf333ce97e533b04bbfa3;p=bertos.git diff --git a/drv/timer.c b/drv/timer.c deleted file mode 100755 index e0208b88..00000000 --- a/drv/timer.c +++ /dev/null @@ -1,324 +0,0 @@ -/*! - * \file - * - * - * \brief Hardware independent timer driver (implementation) - * - * \version $Id$ - * \author Bernardo Innocenti - */ - -/*#* - *#* $Log$ - *#* Revision 1.23 2004/12/13 12:07:06 bernie - *#* DISABLE_IRQSAVE/ENABLE_IRQRESTORE: Convert to IRQ_SAVE_DISABLE/IRQ_RESTORE. - *#* - *#* Revision 1.22 2004/12/08 09:12:09 bernie - *#* Rename time_t to mtime_t. - *#* - *#* Revision 1.21 2004/11/28 23:20:25 bernie - *#* Remove obsolete INITLIST macro. - *#* - *#* Revision 1.20 2004/11/16 20:59:06 bernie - *#* Add watchdog timer support. - *#* - *#* Revision 1.19 2004/10/19 08:56:49 bernie - *#* TIMER_STROBE_ON, TIMER_STROBE_OFF, TIMER_STROBE_INIT: Move from timer_avr.h to timer.h, where they really belong. - *#* - *#* Revision 1.18 2004/10/14 23:14:05 bernie - *#* Fix longstanding problem with wrap-arounds. - *#* - *#* Revision 1.17 2004/10/03 18:52:08 bernie - *#* Move \brief on top in header to please Doxygen. - *#* - *#* Revision 1.16 2004/10/03 18:48:01 bernie - *#* timer_delay(): Add a sanity check to avoid sleeping forever. - *#* - *#* Revision 1.15 2004/09/14 21:07:18 bernie - *#* Use debug.h instead of kdebug.h. - *#* - *#* Revision 1.14 2004/08/25 14:12:08 rasky - *#* Aggiornato il comment block dei log RCS - *#* - *#* Revision 1.13 2004/08/10 06:59:09 bernie - *#* timer_gettick(): Rename to timer_ticks() and add backwards compatibility inline. - *#* - *#* Revision 1.12 2004/08/08 05:59:37 bernie - *#* Remove a few useless casts. - *#* - *#* Revision 1.11 2004/08/02 20:20:29 aleph - *#* Merge from project_ks - *#* - *#* Revision 1.10 2004/07/30 14:15:53 rasky - *#* Nuovo supporto unificato per detect della CPU - *#* - *#* Revision 1.9 2004/07/21 00:15:13 bernie - *#* Put timer driver on diet. - *#* - *#* Revision 1.8 2004/07/18 21:57:07 bernie - *#* Fix preprocessor warning with potentially undefined symbol. - *#* - *#* Revision 1.6 2004/06/07 18:10:06 aleph - *#* Remove free pool of timers; use user-provided Timer structure instead - *#* - *#* Revision 1.5 2004/06/07 15:56:55 aleph - *#* Some tabs cleanup and add timer strobe macros - *#* - *#* Revision 1.4 2004/06/06 18:25:44 bernie - *#* Rename event macros to look like regular functions. - *#* - *#* Revision 1.3 2004/06/06 17:18:42 bernie - *#* Fix \!CONFIG_KERN_SIGNALS code paths. - *#* - *#* Revision 1.2 2004/06/03 11:27:09 bernie - *#* Add dual-license information. - *#* - *#* Revision 1.1 2004/05/23 18:23:30 bernie - *#* Import drv/timer module. - *#* - *#*/ - -#include "timer.h" -#include -#include -#include CPU_HEADER(timer) -#include -#include - -/* - * Sanity check for config parameters required by this module. - */ -#if !defined(CONFIG_KERNEL) || ((CONFIG_KERNEL != 0) && CONFIG_KERNEL != 1) - #error CONFIG_KERNEL must be set to either 0 or 1 in config.h -#endif -#if !defined(CONFIG_WATCHDOG) || ((CONFIG_WATCHDOG != 0) && CONFIG_WATCHDOG != 1) - #error CONFIG_WATCHDOG must be set to either 0 or 1 in config.h -#endif - -#if CONFIG_WATCHDOG - #include -#endif - -#if CONFIG_KERNEL && CONFIG_KERN_SIGNALS - #include -#endif - - -/*! - * \def CONFIG_TIMER_STROBE - * - * This is a debug facility that can be used to - * monitor timer interrupt activity on an external pin. - * - * To use strobes, redefine the macros TIMER_STROBE_ON, - * TIMER_STROBE_OFF and TIMER_STROBE_INIT and set - * CONFIG_TIMER_STROBE to 1. - */ -#if !defined(CONFIG_TIMER_STROBE) || !CONFIG_TIMER_STROBE - #define TIMER_STROBE_ON do {/*nop*/} while(0) - #define TIMER_STROBE_OFF do {/*nop*/} while(0) - #define TIMER_STROBE_INIT do {/*nop*/} while(0) -#endif - - -//! Master system clock (1ms accuracy) -volatile mtime_t _clock; - - -#ifndef CONFIG_TIMER_DISABLE_EVENTS - -/*! - * List of active asynchronous timers. - */ -REGISTER static List timers_queue; - - -/*! - * Add the specified timer to the software timer service queue. - * When the delay indicated by the timer expires, the timer - * device will execute the event associated with it. - * - * \note Interrupt safe - */ -void timer_add(Timer *timer) -{ - Timer *node; - cpuflags_t flags; - - IRQ_SAVE_DISABLE(flags); - - /* Calculate expiration time for this timer */ - timer->tick = _clock + timer->delay; - - /* - * Search for the first node whose expiration time is - * greater than the timer we want to add. - */ - node = (Timer *)timers_queue.head; - while (node->link.succ) - { - /* - * Stop just after the insertion point. - * (this fancy compare takes care of wrap-arounds). - */ - if (node->tick - timer->tick > 0) - break; - - /* Go to next node */ - node = (Timer *)node->link.succ; - } - - /* Enqueue timer request into the list */ - INSERTBEFORE(&timer->link, &node->link); - - IRQ_RESTORE(flags); -} - - -/*! - * Remove a timer from the timer queue before it has expired. - */ -Timer *timer_abort(Timer *timer) -{ - ATOMIC(REMOVE(&timer->link)); - - return timer; -} - -#endif /* CONFIG_TIMER_DISABLE_EVENTS */ - - -/*! - * Wait for the specified amount of time (expressed in ms). - */ -void timer_delay(mtime_t time) -{ -#if defined(IRQ_GETSTATE) - /* We shouldn't sleep with interrupts disabled */ - ASSERT(IRQ_GETSTATE()); -#endif - -#if defined(CONFIG_KERN_SIGNALS) && CONFIG_KERN_SIGNALS - Timer t; - - ASSERT(!sig_check(SIG_SINGLE)); - timer_set_event_signal(&t, proc_current(), SIG_SINGLE); - timer_set_delay(&t, time); - timer_add(&t); - sig_wait(SIG_SINGLE); - -#else /* !CONFIG_KERN_SIGNALS */ - - mtime_t start = timer_ticks(); - - /* Busy wait */ - while (timer_ticks() - start < time) - { -#if CONFIG_WATCHDOG - wdt_reset(); -#endif - } - -#endif /* !CONFIG_KERN_SIGNALS */ -} - - -#ifndef CONFIG_TIMER_DISABLE_UDELAY -/*! - * Wait for the specified amount of time (expressed in microseconds). - * - * \bug In AVR arch the maximum amount of time that can be used as - * delay could be very limited, depending on the hardware timer - * used. Check timer_avr.h, and what register is used as hptime_t. - */ -void timer_udelay(utime_t usec_delay) -{ - if (UNLIKELY(usec_delay > 1000)) - { - timer_delay(usec_delay / 1000); - usec_delay %= 1000; - } - - // FIXME: This multiplication is too slow at run-time. We should try and move it - // to compile-time by exposing the TIMER_HW_HPTICKS_PER_SEC in the header - // file. - hptime_t start = timer_hw_hpread(); - hptime_t delay = (uint32_t)usec_delay * TIMER_HW_HPTICKS_PER_SEC / 1000000ul; - - while (timer_hw_hpread() - start < delay) - {} -} -#endif /* CONFIG_TIMER_DISABLE_UDELAY */ - - -/*! - * Timer interrupt handler. Find soft timers expired and - * trigger corresponding events. - */ -DEFINE_TIMER_ISR -{ - /* - * With the Metrowerks compiler, the only way to force the compiler generate - * an interrupt service routine is to put a pragma directive within the function - * body. - */ - #ifdef __MWERKS__ - #pragma interrupt saveall - #endif - -#ifndef CONFIG_TIMER_DISABLE_EVENTS - Timer *timer; -#endif - - TIMER_STROBE_ON; - - timer_hw_irq(); - - /* Update the master ms counter */ - ++_clock; - -#ifndef CONFIG_TIMER_DISABLE_EVENTS - /* - * Check the first timer request in the list and process - * it when it has expired. Repeat this check until the - * first node has not yet expired. Since the list is sorted - * by expiry time, all the following requests are guaranteed - * to expire later. - */ - while ((timer = (Timer *)timers_queue.head)->link.succ) - { - /* This request in list has not yet expired? */ - if (_clock < timer->tick) - break; - - /* Retreat the expired timer */ - REMOVE(&timer->link); - - /* Execute the associated event */ - event_do(&timer->expire); - } -#endif /* CONFIG_TIMER_DISABLE_EVENTS */ - - TIMER_STROBE_OFF; -} - - -/*! - * Initialize timer - */ -void timer_init(void) -{ - TIMER_STROBE_INIT; - -#ifndef CONFIG_TIMER_DISABLE_EVENTS - LIST_INIT(&timers_queue); -#endif - - _clock = 0; - - timer_hw_init(); -}