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      1 /*	$NetBSD: aarch64.c,v 1.2 2022/06/07 08:08:31 ryo Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2022 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Ryo Shimizu.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 __RCSID("$NetBSD: aarch64.c,v 1.2 2022/06/07 08:08:31 ryo Exp $");
     35 #endif /* not lint */
     36 
     37 #include <kvm.h>
     38 #include <nlist.h>
     39 #include <err.h>
     40 #include <stdlib.h>
     41 
     42 #include "extern.h"
     43 
     44 vaddr_t el0_trap;
     45 vaddr_t el1_trap;
     46 vaddr_t cpu_switchto_softint;
     47 
     48 static struct nlist nl[] = {
     49 	{ .n_name = "el0_trap" },		/* 0 */
     50 	{ .n_name = "el1_trap" },		/* 1 */
     51 	{ .n_name = "cpu_switchto_softint" },	/* 2 */
     52 	{ .n_name = NULL },
     53 };
     54 
     55 void
     56 db_mach_init(kvm_t *kd)
     57 {
     58 	if (kvm_nlist(kd, nl) == -1)
     59 		errx(EXIT_FAILURE, "kvm_nlist: %s", kvm_geterr(kd));
     60 
     61 	el0_trap = nl[0].n_value;
     62 	el1_trap = nl[1].n_value;
     63 	cpu_switchto_softint = nl[2].n_value;
     64 }
     65