The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/mips/malta/yamon.c

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    1 /*-
    2  * Copyright (c) 2006-2008 Bruce M. Simpson
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions, and the following disclaimer,
   10  *    without modification, immediately at the beginning of the file.
   11  * 2. The name of the author may not be used to endorse or promote products
   12  *    derived from this software without specific prior written permission.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   18  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  */
   27 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD: releng/8.4/sys/mips/malta/yamon.c 215938 2010-11-27 12:26:40Z jchandra $");
   30 
   31 #include <sys/param.h>
   32 #include <sys/systm.h>
   33 
   34 #include <mips/malta/yamon.h>
   35 
   36 char *
   37 yamon_getenv(char *name)
   38 {
   39         char *value;
   40         yamon_env_t *p;
   41 
   42         value = NULL;
   43         for (p = *fenvp; p->name != NULL; ++p) {
   44             if (!strcmp(name, p->name)) {
   45                 value = p->value;
   46                 break;
   47             }
   48         }
   49 
   50         return (value);
   51 }
   52 
   53 uint32_t
   54 yamon_getcpufreq(void)
   55 {
   56         uint32_t freq;
   57         int ret;
   58 
   59         ret = YAMON_SYSCON_READ(SYSCON_BOARD_CPU_CLOCK_FREQ_ID, &freq,
   60             sizeof(freq));
   61         if (ret != 0)
   62                 freq = 0;
   63 
   64         return (freq);
   65 }

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