source: trunk/libs/newlib/src/libgloss/sparc_leon/timer.c @ 668

Last change on this file since 668 was 444, checked in by satin@…, 6 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc

File size: 3.7 KB
Line 
1/*
2 * Copyright (c) 2011 Aeroflex Gaisler
3 *
4 * BSD license:
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25
26#include <sys/types.h>
27#include <sys/time.h>
28#include <sys/errno.h>
29#include <asm-leon/leon.h>
30#include <asm-leon/irq.h>
31#include <asm-leon/timer.h>
32#include <asm-leon/leoncompat.h>
33
34// '''''''''''''''''''''''''''''''''''''''''''''''''''''
35
36TAILQ_HEAD (timer_queue, timerevent) timers = TAILQ_HEAD_INITIALIZER (timers);
37
38     int
39     addtimer (struct timerevent *e)
40{
41  struct timerevent *next;
42  unsigned long old = leonbare_disable_traps ();
43  TAILQ_FOREACH (next, &timers, n)
44  {
45    if (!GT_TIMESPEC (e->expire, next->expire))
46      break;
47  }
48  if (next)
49    {
50      TAILQ_INSERT_BEFORE (next, e, n);
51    }
52  else
53    {
54      TAILQ_INSERT_TAIL (&timers, e, n);
55    }
56  leonbare_enable_traps (old);
57}
58
59extern unsigned long noalarm;
60void
61settimer ()
62{
63  struct timeval tv, te;
64  struct timerevent *e = TAILQ_FIRST (&timers), *n;
65  while (e)
66    {
67      n = TAILQ_NEXT (e, n);
68      te.tv_sec = e->expire.tv_sec;
69      te.tv_usec = e->expire.tv_nsec / NSEC_PER_USEC;
70      do_gettimeofday (&tv);
71      if (GT_TIMEVAL (te, tv))
72        {
73          MINUS_TIMEVAL (te, te, tv);
74          if (!tv.tv_sec || te.tv_usec <= tick_usec)
75            {
76              if (!noalarm)
77                {
78                  //---------------------
79                  switch (LEONCOMPAT_VERSION)
80                    {
81                    case 3:
82                    default:
83                      LEON3_GpTimer_Regs->e[1].val = 0;
84                      LEON3_GpTimer_Regs->e[1].rld = te.tv_usec - 1;
85                      LEON3_GpTimer_Regs->e[1].ctrl = 0;
86                      LEON3_GpTimer_Regs->e[1].ctrl =
87                        LEON3_GPTIMER_EN |
88                        LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN;
89                      break;
90                    }
91                }
92              //---------------------
93            }
94        }
95      else
96        {
97          unsigned long old = leonbare_disable_traps ();
98          TAILQ_REMOVE (&timers, e, n);
99          e->handler (e->arg);
100          leonbare_enable_traps (old);
101        }
102      e = n;
103    }
104}
105
106int
107Timer_getTimer1 (unsigned int **count, unsigned int **reload,
108                 unsigned int **ctrl)
109{
110  //---------------------
111  switch (LEONCOMPAT_VERSION)
112    {
113    case 3:
114    default:
115      amba_init ();
116      *count = (unsigned int *) &(LEON3_GpTimer_Regs->e[0].val);
117      *reload = (unsigned int *) &(LEON3_GpTimer_Regs->e[0].rld);
118      *ctrl = (unsigned int *) &(LEON3_GpTimer_Regs->e[0].ctrl);
119      break;
120    }
121  //---------------------
122  return 1;
123}
124
125int
126Timer_getTimer2 (unsigned int **count, unsigned int **reload,
127                 unsigned int **ctrl)
128{
129  //---------------------
130  switch (LEONCOMPAT_VERSION)
131    {
132    case 3:
133    default:
134      amba_init ();
135      if (!noalarm)
136        {
137          *count = (unsigned int *) &(LEON3_GpTimer_Regs->e[1].val);
138          *reload = (unsigned int *) &(LEON3_GpTimer_Regs->e[1].rld);
139          *ctrl = (unsigned int *) &(LEON3_GpTimer_Regs->e[1].ctrl);
140          break;
141        }
142      return 0;
143    }
144  //---------------------
145  return 1;
146}
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