1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
156 lines
3.3 KiB
C
156 lines
3.3 KiB
C
/******************************************************************************
|
|
*
|
|
* (C)Copyright 1998,1999 SysKonnect,
|
|
* a business unit of Schneider & Koch & Co. Datensysteme GmbH.
|
|
*
|
|
* See the file "skfddi.c" for further information.
|
|
*
|
|
* 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.
|
|
*
|
|
* The information in this file is provided "AS IS" without warranty.
|
|
*
|
|
******************************************************************************/
|
|
|
|
/*
|
|
SMT timer
|
|
*/
|
|
|
|
#include "h/types.h"
|
|
#include "h/fddi.h"
|
|
#include "h/smc.h"
|
|
|
|
#ifndef lint
|
|
static const char ID_sccs[] = "@(#)smttimer.c 2.4 97/08/04 (C) SK " ;
|
|
#endif
|
|
|
|
static void timer_done(struct s_smc *smc, int restart);
|
|
|
|
void smt_timer_init(struct s_smc *smc)
|
|
{
|
|
smc->t.st_queue = NULL;
|
|
smc->t.st_fast.tm_active = FALSE ;
|
|
smc->t.st_fast.tm_next = NULL;
|
|
hwt_init(smc) ;
|
|
}
|
|
|
|
void smt_timer_stop(struct s_smc *smc, struct smt_timer *timer)
|
|
{
|
|
struct smt_timer **prev ;
|
|
struct smt_timer *tm ;
|
|
|
|
/*
|
|
* remove timer from queue
|
|
*/
|
|
timer->tm_active = FALSE ;
|
|
if (smc->t.st_queue == timer && !timer->tm_next) {
|
|
hwt_stop(smc) ;
|
|
}
|
|
for (prev = &smc->t.st_queue ; (tm = *prev) ; prev = &tm->tm_next ) {
|
|
if (tm == timer) {
|
|
*prev = tm->tm_next ;
|
|
if (tm->tm_next) {
|
|
tm->tm_next->tm_delta += tm->tm_delta ;
|
|
}
|
|
return ;
|
|
}
|
|
}
|
|
}
|
|
|
|
void smt_timer_start(struct s_smc *smc, struct smt_timer *timer, u_long time,
|
|
u_long token)
|
|
{
|
|
struct smt_timer **prev ;
|
|
struct smt_timer *tm ;
|
|
u_long delta = 0 ;
|
|
|
|
time /= 16 ; /* input is uS, clock ticks are 16uS */
|
|
if (!time)
|
|
time = 1 ;
|
|
smt_timer_stop(smc,timer) ;
|
|
timer->tm_smc = smc ;
|
|
timer->tm_token = token ;
|
|
timer->tm_active = TRUE ;
|
|
if (!smc->t.st_queue) {
|
|
smc->t.st_queue = timer ;
|
|
timer->tm_next = NULL;
|
|
timer->tm_delta = time ;
|
|
hwt_start(smc,time) ;
|
|
return ;
|
|
}
|
|
/*
|
|
* timer correction
|
|
*/
|
|
timer_done(smc,0) ;
|
|
|
|
/*
|
|
* find position in queue
|
|
*/
|
|
delta = 0 ;
|
|
for (prev = &smc->t.st_queue ; (tm = *prev) ; prev = &tm->tm_next ) {
|
|
if (delta + tm->tm_delta > time) {
|
|
break ;
|
|
}
|
|
delta += tm->tm_delta ;
|
|
}
|
|
/* insert in queue */
|
|
*prev = timer ;
|
|
timer->tm_next = tm ;
|
|
timer->tm_delta = time - delta ;
|
|
if (tm)
|
|
tm->tm_delta -= timer->tm_delta ;
|
|
/*
|
|
* start new with first
|
|
*/
|
|
hwt_start(smc,smc->t.st_queue->tm_delta) ;
|
|
}
|
|
|
|
void smt_force_irq(struct s_smc *smc)
|
|
{
|
|
smt_timer_start(smc,&smc->t.st_fast,32L, EV_TOKEN(EVENT_SMT,SM_FAST));
|
|
}
|
|
|
|
void smt_timer_done(struct s_smc *smc)
|
|
{
|
|
timer_done(smc,1) ;
|
|
}
|
|
|
|
static void timer_done(struct s_smc *smc, int restart)
|
|
{
|
|
u_long delta ;
|
|
struct smt_timer *tm ;
|
|
struct smt_timer *next ;
|
|
struct smt_timer **last ;
|
|
int done = 0 ;
|
|
|
|
delta = hwt_read(smc) ;
|
|
last = &smc->t.st_queue ;
|
|
tm = smc->t.st_queue ;
|
|
while (tm && !done) {
|
|
if (delta >= tm->tm_delta) {
|
|
tm->tm_active = FALSE ;
|
|
delta -= tm->tm_delta ;
|
|
last = &tm->tm_next ;
|
|
tm = tm->tm_next ;
|
|
}
|
|
else {
|
|
tm->tm_delta -= delta ;
|
|
delta = 0 ;
|
|
done = 1 ;
|
|
}
|
|
}
|
|
*last = NULL;
|
|
next = smc->t.st_queue ;
|
|
smc->t.st_queue = tm ;
|
|
|
|
for ( tm = next ; tm ; tm = next) {
|
|
next = tm->tm_next ;
|
|
timer_event(smc,tm->tm_token) ;
|
|
}
|
|
|
|
if (restart && smc->t.st_queue)
|
|
hwt_start(smc,smc->t.st_queue->tm_delta) ;
|
|
}
|
|
|