109 строки
2.9 KiB
C
109 строки
2.9 KiB
C
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/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University.
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* All rights reserved.
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* Copyright (c) 2004-2005 The Trustees of the University of Tennessee.
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* All rights reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "ompi_config.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <sn/mmtimer.h>
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#include <unistd.h>
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#include <errno.h>
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#include "opal/mca/timer/timer.h"
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#include "opal/mca/timer/altix/timer_altix.h"
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#include "opal/include/constants.h"
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opal_timer_t opal_timer_altix_freq;
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opal_timer_t opal_timer_altix_usec_conv;
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volatile unsigned long *opal_timer_altix_mmdev_timer_addr;
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static unsigned long *mmdev_map;
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static int opal_timer_altix_open(void);
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static int opal_timer_altix_close(void);
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const opal_timer_base_component_1_0_0_t mca_timer_altix_component = {
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/* First, the mca_component_t struct containing meta information
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about the component itself */
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{
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/* Indicate that we are a timer v1.0.0 component (which also
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implies a specific MCA version) */
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OPAL_TIMER_BASE_VERSION_1_0_0,
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/* Component name and version */
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"altix",
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OPAL_MAJOR_VERSION,
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OPAL_MINOR_VERSION,
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OPAL_RELEASE_VERSION,
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/* Component open and close functions */
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opal_timer_altix_open,
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opal_timer_altix_close
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},
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/* Next the MCA v1.0.0 component meta data */
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{
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/* Whether the component is checkpointable or not */
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true
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},
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};
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static int
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opal_timer_altix_open(void)
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{
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int fd, ret;
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unsigned long val;
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long offset;
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fd = open(MMTIMER_FULLNAME, O_RDONLY);
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if (fd < 0) return OPAL_ERR_NOT_FOUND;
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/* make sure we can map the timer */
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ret = ioctl(fd, MMTIMER_MMAPAVAIL, 0);
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if (1 != ret) return OPAL_ERR_NOT_SUPPORTED;
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/* find the frequency */
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ret = ioctl(fd, MMTIMER_GETFREQ, &val);
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if (ret == -ENOSYS) return OPAL_ERR_NOT_SUPPORTED;
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opal_timer_altix_freq = val;
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opal_timer_altix_usec_conv = opal_timer_altix_freq / 1000000;
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/* find the address of the counter */
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ret = ioctl(fd, MMTIMER_GETOFFSET, 0);
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if (ret == -ENOSYS) return OPAL_ERR_NOT_SUPPORTED;
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offset = ret;
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mmdev_map = mmap(0, getpagesize(), PROT_READ, MAP_SHARED, fd, 0);
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if (NULL == mmdev_map) return OPAL_ERR_NOT_SUPPORTED;
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opal_timer_altix_mmdev_timer_addr = mmdev_map + offset;
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return OPAL_SUCCESS;
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}
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static int
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opal_timer_altix_close(void)
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{
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if (NULL != mmdev_map) {
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munmap(mmdev_map, getpagesize());
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}
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return OPAL_SUCCESS;
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}
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