NetBSD/sys/ddb/db_cpu.c

66 lines
2.1 KiB
C

/* $NetBSD: db_cpu.c,v 1.3 2009/03/09 06:07:05 mrg Exp $ */
/*-
* Copyright (c) 2009 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Andrew Doran.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: db_cpu.c,v 1.3 2009/03/09 06:07:05 mrg Exp $");
#ifndef _KERNEL
#include <stdbool.h>
#endif
#include <sys/param.h>
#include <sys/cpu.h>
#include <sys/proc.h>
#include <ddb/ddb.h>
static struct cpu_info *head;
struct cpu_info *
db_cpu_first(void)
{
head = db_read_ptr("cpu_queue");
return head;
}
struct cpu_info *
db_cpu_next(struct cpu_info *ci)
{
db_read_bytes((db_addr_t)&ci->ci_data.cpu_qchain.cqe_next,
sizeof(ci), (char *)&ci);
if (ci == head) {
ci = NULL;
}
return ci;
}