newlib-cygwin/libgloss/sparc_leon/timer.c

147 lines
3.7 KiB
C

/*
* Copyright (c) 2011 Aeroflex Gaisler
*
* BSD license:
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <sys/types.h>
#include <sys/time.h>
#include <sys/errno.h>
#include <asm-leon/leon.h>
#include <asm-leon/irq.h>
#include <asm-leon/timer.h>
#include <asm-leon/leoncompat.h>
// '''''''''''''''''''''''''''''''''''''''''''''''''''''
TAILQ_HEAD (timer_queue, timerevent) timers = TAILQ_HEAD_INITIALIZER (timers);
int
addtimer (struct timerevent *e)
{
struct timerevent *next;
unsigned long old = leonbare_disable_traps ();
TAILQ_FOREACH (next, &timers, n)
{
if (!GT_TIMESPEC (e->expire, next->expire))
break;
}
if (next)
{
TAILQ_INSERT_BEFORE (next, e, n);
}
else
{
TAILQ_INSERT_TAIL (&timers, e, n);
}
leonbare_enable_traps (old);
}
extern unsigned long noalarm;
void
settimer ()
{
struct timeval tv, te;
struct timerevent *e = TAILQ_FIRST (&timers), *n;
while (e)
{
n = TAILQ_NEXT (e, n);
te.tv_sec = e->expire.tv_sec;
te.tv_usec = e->expire.tv_nsec / NSEC_PER_USEC;
do_gettimeofday (&tv);
if (GT_TIMEVAL (te, tv))
{
MINUS_TIMEVAL (te, te, tv);
if (!tv.tv_sec || te.tv_usec <= tick_usec)
{
if (!noalarm)
{
//---------------------
switch (LEONCOMPAT_VERSION)
{
case 3:
default:
LEON3_GpTimer_Regs->e[1].val = 0;
LEON3_GpTimer_Regs->e[1].rld = te.tv_usec - 1;
LEON3_GpTimer_Regs->e[1].ctrl = 0;
LEON3_GpTimer_Regs->e[1].ctrl =
LEON3_GPTIMER_EN |
LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN;
break;
}
}
//---------------------
}
}
else
{
unsigned long old = leonbare_disable_traps ();
TAILQ_REMOVE (&timers, e, n);
e->handler (e->arg);
leonbare_enable_traps (old);
}
e = n;
}
}
int
Timer_getTimer1 (unsigned int **count, unsigned int **reload,
unsigned int **ctrl)
{
//---------------------
switch (LEONCOMPAT_VERSION)
{
case 3:
default:
amba_init ();
*count = (unsigned int *) &(LEON3_GpTimer_Regs->e[0].val);
*reload = (unsigned int *) &(LEON3_GpTimer_Regs->e[0].rld);
*ctrl = (unsigned int *) &(LEON3_GpTimer_Regs->e[0].ctrl);
break;
}
//---------------------
return 1;
}
int
Timer_getTimer2 (unsigned int **count, unsigned int **reload,
unsigned int **ctrl)
{
//---------------------
switch (LEONCOMPAT_VERSION)
{
case 3:
default:
amba_init ();
if (!noalarm)
{
*count = (unsigned int *) &(LEON3_GpTimer_Regs->e[1].val);
*reload = (unsigned int *) &(LEON3_GpTimer_Regs->e[1].rld);
*ctrl = (unsigned int *) &(LEON3_GpTimer_Regs->e[1].ctrl);
break;
}
return 0;
}
//---------------------
return 1;
}