1849aef49SAndrew Turner /* $NetBSD: csan.h,v 1.2 2019/11/06 06:57:22 maxv Exp $ */
2849aef49SAndrew Turner
3849aef49SAndrew Turner /*
4849aef49SAndrew Turner * Copyright (c) 2019 The NetBSD Foundation, Inc.
5849aef49SAndrew Turner * All rights reserved.
6849aef49SAndrew Turner *
7849aef49SAndrew Turner * This code is derived from software contributed to The NetBSD Foundation
8849aef49SAndrew Turner * by Maxime Villard.
9849aef49SAndrew Turner *
10849aef49SAndrew Turner * Redistribution and use in source and binary forms, with or without
11849aef49SAndrew Turner * modification, are permitted provided that the following conditions
12849aef49SAndrew Turner * are met:
13849aef49SAndrew Turner * 1. Redistributions of source code must retain the above copyright
14849aef49SAndrew Turner * notice, this list of conditions and the following disclaimer.
15849aef49SAndrew Turner * 2. Redistributions in binary form must reproduce the above copyright
16849aef49SAndrew Turner * notice, this list of conditions and the following disclaimer in the
17849aef49SAndrew Turner * documentation and/or other materials provided with the distribution.
18849aef49SAndrew Turner *
19849aef49SAndrew Turner * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20849aef49SAndrew Turner * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21849aef49SAndrew Turner * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22849aef49SAndrew Turner * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23849aef49SAndrew Turner * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24849aef49SAndrew Turner * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25849aef49SAndrew Turner * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26849aef49SAndrew Turner * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27849aef49SAndrew Turner * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28849aef49SAndrew Turner * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29849aef49SAndrew Turner * POSSIBILITY OF SUCH DAMAGE.
30849aef49SAndrew Turner */
31849aef49SAndrew Turner
32*3fd63ddfSAndrew Turner #include <sys/timetc.h>
33*3fd63ddfSAndrew Turner
34*3fd63ddfSAndrew Turner #include <machine/clock.h>
35849aef49SAndrew Turner #include <machine/cpufunc.h>
36849aef49SAndrew Turner #include <machine/stack.h>
37849aef49SAndrew Turner #include <machine/vmparam.h>
38849aef49SAndrew Turner
39849aef49SAndrew Turner static inline bool
kcsan_md_unsupported(vm_offset_t addr)4068cad681SAndrew Turner kcsan_md_unsupported(vm_offset_t addr)
4168cad681SAndrew Turner {
4268cad681SAndrew Turner return false;
4368cad681SAndrew Turner }
4468cad681SAndrew Turner
4568cad681SAndrew Turner static inline bool
kcsan_md_is_avail(void)46849aef49SAndrew Turner kcsan_md_is_avail(void)
47849aef49SAndrew Turner {
48849aef49SAndrew Turner return true;
49849aef49SAndrew Turner }
50849aef49SAndrew Turner
51849aef49SAndrew Turner static inline void
kcsan_md_disable_intrs(uint64_t * state)52849aef49SAndrew Turner kcsan_md_disable_intrs(uint64_t *state)
53849aef49SAndrew Turner {
54849aef49SAndrew Turner
55849aef49SAndrew Turner *state = intr_disable();
56849aef49SAndrew Turner }
57849aef49SAndrew Turner
58849aef49SAndrew Turner static inline void
kcsan_md_enable_intrs(uint64_t * state)59849aef49SAndrew Turner kcsan_md_enable_intrs(uint64_t *state)
60849aef49SAndrew Turner {
61849aef49SAndrew Turner
62849aef49SAndrew Turner intr_restore(*state);
63849aef49SAndrew Turner }
64849aef49SAndrew Turner
65849aef49SAndrew Turner static inline void
kcsan_md_delay(uint64_t us)66849aef49SAndrew Turner kcsan_md_delay(uint64_t us)
67849aef49SAndrew Turner {
68*3fd63ddfSAndrew Turner /*
69*3fd63ddfSAndrew Turner * Only call DELAY if not using the early delay code. The i8254
70*3fd63ddfSAndrew Turner * early delay function may cause us to recurse on a spin lock
71*3fd63ddfSAndrew Turner * leading to a panic.
72*3fd63ddfSAndrew Turner */
73*3fd63ddfSAndrew Turner if ((tsc_is_invariant && tsc_freq != 0) ||
74*3fd63ddfSAndrew Turner timecounter->tc_quality > 0)
75849aef49SAndrew Turner DELAY(us);
76849aef49SAndrew Turner }
77849aef49SAndrew Turner
78849aef49SAndrew Turner static void
kcsan_md_unwind(void)79849aef49SAndrew Turner kcsan_md_unwind(void)
80849aef49SAndrew Turner {
81849aef49SAndrew Turner }
82