common/os/cpupm.c

	cpupm.c revision 0e7515250c8395f368aa45fb9acae7c4f8f8b786
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <sys/sunddi.h>
#include <sys/cpupm.h>

/*
 * Initialize the field that will be used for reporting
 * the supported_frequencies_Hz cpu_info kstat.
 */
void
cpupm_set_supp_freqs(cpu_t *cp, int *speeds, uint_t nspeeds)
{
    char        *supp_freqs = NULL;
    char        *sfptr;
    uint64_t    *hzspeeds;
    int     i;
    int     j;
#define UINT64_MAX_STRING (sizeof ("18446744073709551615"))

    if (speeds == NULL) {
        cpu_set_supp_freqs(cp, supp_freqs);
        return;
    }

    hzspeeds = kmem_zalloc(nspeeds * sizeof (uint64_t), KM_SLEEP);
    for (i = nspeeds - 1, j = 0; i >= 0; i--, j++) {
        hzspeeds[i] = CPUPM_SPEED_HZ(cp->cpu_type_info.pi_clock,
            speeds[j]);
    }

    supp_freqs = kmem_zalloc((UINT64_MAX_STRING * nspeeds), KM_SLEEP);
    sfptr = supp_freqs;
    for (i = 0; i < nspeeds; i++) {
        if (i == nspeeds - 1) {
            (void) sprintf(sfptr, "%"PRIu64, hzspeeds[i]);
        } else {
            (void) sprintf(sfptr, "%"PRIu64":", hzspeeds[i]);
            sfptr = supp_freqs + strlen(supp_freqs);
        }
    }
    cpu_set_supp_freqs(cp, supp_freqs);
    kmem_free(supp_freqs, (UINT64_MAX_STRING * nspeeds));
    kmem_free(hzspeeds, nspeeds * sizeof (uint64_t));
}