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/*
* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2005 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "opal_config.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sn/mmtimer.h>
#include <unistd.h>
#include <errno.h>
#include "opal/mca/timer/timer.h"
#include "opal/mca/timer/altix/timer_altix.h"
#include "opal/constants.h"
opal_timer_t opal_timer_altix_freq;
opal_timer_t opal_timer_altix_usec_conv;
volatile unsigned long *opal_timer_altix_mmdev_timer_addr;
static unsigned long *mmdev_map;
static int opal_timer_altix_open(void);
static int opal_timer_altix_close(void);
const opal_timer_base_component_2_0_0_t mca_timer_altix_component = {
/* First, the mca_component_t struct containing meta information
about the component itself */
{
OPAL_TIMER_BASE_VERSION_2_0_0,
/* Component name and version */
"altix",
OPAL_MAJOR_VERSION,
OPAL_MINOR_VERSION,
OPAL_RELEASE_VERSION,
/* Component open and close functions */
opal_timer_altix_open,
opal_timer_altix_close
},
{
/* The component is checkpoint ready */
MCA_BASE_METADATA_PARAM_CHECKPOINT
},
};
static int
opal_timer_altix_open(void)
{
int fd, ret;
unsigned long val;
long offset;
fd = open(MMTIMER_FULLNAME, O_RDONLY);
if (fd < 0) return OPAL_ERR_NOT_FOUND;
/* make sure we can map the timer */
ret = ioctl(fd, MMTIMER_MMAPAVAIL, 0);
if (1 != ret) return OPAL_ERR_NOT_SUPPORTED;
/* find the frequency */
ret = ioctl(fd, MMTIMER_GETFREQ, &val);
if (ret == -ENOSYS) return OPAL_ERR_NOT_SUPPORTED;
opal_timer_altix_freq = val;
opal_timer_altix_usec_conv = opal_timer_altix_freq / 1000000;
/* find the address of the counter */
ret = ioctl(fd, MMTIMER_GETOFFSET, 0);
if (ret == -ENOSYS) return OPAL_ERR_NOT_SUPPORTED;
offset = ret;
mmdev_map = mmap(0, getpagesize(), PROT_READ, MAP_SHARED, fd, 0);
if (NULL == mmdev_map) return OPAL_ERR_NOT_SUPPORTED;
opal_timer_altix_mmdev_timer_addr = mmdev_map + offset;
close(fd);
return OPAL_SUCCESS;
}
static int
opal_timer_altix_close(void)
{
if (NULL != mmdev_map) {
munmap(mmdev_map, getpagesize());
}
return OPAL_SUCCESS;
}
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