1/* $NetBSD: csan.h,v 1.2 2019/11/06 06:57:22 maxv Exp $ */
2
3/*
4 * Copyright (c) 2019 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Maxime Villard.
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/timetc.h>
33
34#include <machine/clock.h>
35#include <machine/cpufunc.h>
36#include <machine/stack.h>
37#include <machine/vmparam.h>
38
39static inline bool
40kcsan_md_unsupported(vm_offset_t addr)
41{
42 return false;
43}
44
45static inline bool
46kcsan_md_is_avail(void)
47{
48 return true;
49}
50
51static inline void
52kcsan_md_disable_intrs(uint64_t *state)
53{
54
55 *state = intr_disable();
56}
57
58static inline void
59kcsan_md_enable_intrs(uint64_t *state)
60{
61
62 intr_restore(*state);
63}
64
65static inline void
66kcsan_md_delay(uint64_t us)
67{
68 /*
69 * Only call DELAY if not using the early delay code. The i8254
70 * early delay function may cause us to recurse on a spin lock
71 * leading to a panic.
72 */
73 if ((tsc_is_invariant && tsc_freq != 0) ||
74 timecounter->tc_quality > 0)
75 DELAY(us);
76}
77
78static void
79kcsan_md_unwind(void)
80{
81}