Home | History | Annotate | Line # | Download | only in misc 
      1 /*-
      2  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to The NetBSD Foundation
      6  * by Matt Thomas of 3am Software Foundry.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     20  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     21  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     25  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     27  * POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #include <sys/cdefs.h>
     31 
     32 __RCSID("$NetBSD: powerpc_initfini.c,v 1.1 2013/08/30 21:28:59 matt Exp $");
     33 
     34 #include "namespace.h"
     35 
     36 /*
     37  * Grab the cache_info at load time.
     38  */
     39 
     40 #include <sys/param.h>
     41 #include <sys/sysctl.h>
     42 #include <sys/queue.h>
     43 #include <sys/cpu.h>
     44 
     45 #include <stdbool.h>
     46 #include <stddef.h>
     47 
     48 __dso_hidden struct cache_info _libc_powerpc_cache_info;
     49 
     50 static void _libc_cache_info_init(void)
     51     __attribute__((__constructor__, __used__));
     52 
     53 void __section(".text.startup")
     54 _libc_cache_info_init(void)
     55 {
     56 	static bool initialized;
     57 	if (!initialized) {
     58 		const int name[2] = { CTL_MACHDEP, CPU_CACHEINFO };
     59 		size_t len = sizeof(_libc_powerpc_cache_info);
     60 		(void)sysctl(name, __arraycount(name),
     61 		    &_libc_powerpc_cache_info, &len, NULL, 0);
     62 		initialized = 1;
     63 	}
     64 }
     65