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-rw-r--r--erts/etc/vxworks/wd_example.c141
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diff --git a/erts/etc/vxworks/wd_example.c b/erts/etc/vxworks/wd_example.c
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-/*
- * %CopyrightBegin%
- *
- * Copyright Ericsson AB 1997-2009. All Rights Reserved.
- *
- * The contents of this file are subject to the Erlang Public License,
- * Version 1.1, (the "License"); you may not use this file except in
- * compliance with the License. You should have received a copy of the
- * Erlang Public License along with this software. If not, it can be
- * retrieved online at http://www.erlang.org/.
- *
- * Software distributed under the License is distributed on an "AS IS"
- * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
- * the License for the specific language governing rights and limitations
- * under the License.
- *
- * %CopyrightEnd%
- */
-/*
- * File: frc5te_wd.c
- * Purpose: Watchdog NMI handling for FORCE 5TE
- *
- * Description:
- * The watchdog handler routines are system specific. A program that
- * wants to utilize a hardware watchdog should call wd_init and test
- * the return value. If wd_init returns true (!0); there is a hardware
- * watchdog, and that watchdog has been activated. If no watchdog exists,
- * wd_init returns false (0).
- *
- * To keep the watchdog happy, call wd_reset at least every X seconds,
- * where X is the number of seconds specified in the call to wd_init.
- *
- * The watchdog can be disarmed by setting the variable wd_disarmed to 1,
- * and armed again by setting the same variable to 0. Watchdog status
- * information can be retrieved using the function wd_status.
- *
- */
-
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-#include <frc5e.h>
-#include <logLib.h>
-#include <taskLib.h>
-#include <sysLib.h>
-#include <stdio.h>
-#include "hw_watchdog.h"
-
-/* prototypes */
-extern sysNMIConnect();
-#ifdef __STDC__
-void wd_keeper(int);
-void wd_nmi_int(UINT8);
-void wd_status(void);
-#else
-void wd_keeper();
-void wd_nmi_int();
-void wd_status();
-#endif
-
-#define WD_NMI_MIN_DELAY 0.830 /* Min time before watchdog NMI (in seconds) */
-#define WD_RESET_FREQUENCY (WD_NMI_MIN_DELAY / 2) /* how often the timer is reset */
-
-#define WD_KEEPER_STACK_SIZE 10000
-
-/* global variables */
-extern int spTaskOptions;
-static volatile int wd_count_startval; /* start value set by wd_init */
-static volatile int wd_count; /* counter for wd_keeper */
-volatile int wd_disarmed = 0; /* debug feature */
-
-/* wd_init is executed to initialize the watchdog. It spawns the task */
-/* wd_keeper and returns true (non-zero) if a hardware watchdog exists, */
-/* or returns false (zero) otherwise. */
-int wd_init(timeout, prio)
- int timeout, prio;
-{
- taskSpawn("wd_keeper", prio, spTaskOptions, WD_KEEPER_STACK_SIZE,
- (FUNCPTR)wd_keeper, timeout,0,0,0,0,0,0,0,0,0);
- return !0; /* watchdog exists */
-}
-
-
-/* wd_reset is called as an alive-signal from the supervisor process. */
-/* If there is no call to this function within a certain time, the */
-/* watchdog will reboot the system. */
-void wd_reset()
-{
- wd_count = wd_count_startval;
-}
-
-
-/* wd_keeper runs as a separate task and resets the watchdog timer */
-/* before an NMI is generated. This task uses the counter wd_count to */
-/* decide if it should exit or keep resetting the timer. */
-/* Note! This task must run with higher priority than the application! */
-void wd_keeper(timeout)
- int timeout;
-{
- int wd_delay = sysClkRateGet() * WD_RESET_FREQUENCY;
- wd_count_startval = (int)(timeout / WD_RESET_FREQUENCY);
- wd_count = wd_count_startval;
-
- /* Connect and enable level 15 interrupts */
- sysNMIConnect((VOIDFUNCPTR) wd_nmi_int, WD_NMI, WD_NMI);
- *(char *)FRC5CE_GEN_PURPOSE2_REG |= FRC5CE_NMI_ENABLE;
-
- while ((wd_count > 0) || wd_disarmed) {
- *(char *)FRC5CE_VME_A32MAP_REG |= FRC5CE_WATCHDOG_ENABLE;
- taskDelay(wd_delay);
- if (!wd_disarmed) wd_count--;
- else wd_count = wd_count_startval;
- }
- logMsg("Watchdog keeper exits. No alive signal from application in %d seconds.\n",wd_count_startval * WD_RESET_FREQUENCY,0,0,0,0,0);
-}
-
-
-/* wd_nmi_int is the function connected to the watchdog interrupt. */
-/* It will report the failure to reset the watchdog timer. */
-void wd_nmi_int(type)
- UINT8 type;
-{
- switch(type) {
- case WD_NMI:
- logMsg("Watchdog interrupt! System will reboot.\n",0,0,0,0,0,0);
- break;
- default:
- logMsg("Bad type (%d) in call to watchdog interrupt handler.\n",type,0,0,0,0,0);
- break;
- }
-}
-
-
-/* wd_status displays the current value of the counter. */
-void wd_status()
-{
- fprintf(stderr, "Watchdog is %sarmed.\n", wd_disarmed ? "dis" : "");
- fprintf(stderr, "Counter value: %d\n", wd_count);
- fprintf(stderr, "Start value is: %d (%d seconds)\n",
- wd_count_startval, (int)(wd_count_startval * WD_RESET_FREQUENCY));
-}