diff options
Diffstat (limited to 'sys/kern/subr_pcpu.c')
-rw-r--r-- | sys/kern/subr_pcpu.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/sys/kern/subr_pcpu.c b/sys/kern/subr_pcpu.c new file mode 100644 index 0000000..47ac12e --- /dev/null +++ b/sys/kern/subr_pcpu.c @@ -0,0 +1,65 @@ +/* + * Copyright (c) 2001 Wind River Systems, Inc. + * All rights reserved. + * Written by: John Baldwin <jhb@FreeBSD.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the author nor the names of any co-contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +/* + * This module provides MI support for per-cpu data. + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/pcpu.h> + +static struct globaldata *cpuid_to_globaldata[MAXCPU]; +struct cpuhead cpuhead = SLIST_HEAD_INITIALIZER(cpuhead); + +/* + * Register a struct globaldata. + */ +void +globaldata_register(struct globaldata *globaldata) +{ + + KASSERT(globaldata->gd_cpuid >= 0 && globaldata->gd_cpuid < MAXCPU, + ("globaldata_register: invalid cpuid")); + cpuid_to_globaldata[globaldata->gd_cpuid] = globaldata; + SLIST_INSERT_HEAD(&cpuhead, globaldata, gd_allcpu); +} + +/* + * Locate a struct globaldata by cpu id. + */ +struct globaldata * +globaldata_find(u_int cpuid) +{ + + return (cpuid_to_globaldata[cpuid]); +} |