/* $NetBSD: csan.h,v 1.2 2019/11/06 06:57:22 maxv Exp $ */
/*
* Copyright (c) 2019 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Maxime Villard.
*
* 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/timetc.h>
#include <machine/clock.h>
#include <machine/cpufunc.h>
#include <machine/stack.h>
#include <machine/vmparam.h>
static inline bool
kcsan_md_unsupported(vm_offset_t addr)
{
return false;
}
static inline bool
kcsan_md_is_avail(void)
{
return true;
}
static inline void
kcsan_md_disable_intrs(uint64_t *state)
{
*state = intr_disable();
}
static inline void
kcsan_md_enable_intrs(uint64_t *state)
{
intr_restore(*state);
}
static inline void
kcsan_md_delay(uint64_t us)
{
/*
* Only call DELAY if not using the early delay code. The i8254
* early delay function may cause us to recurse on a spin lock
* leading to a panic.
*/
if ((tsc_is_invariant && tsc_freq != 0) ||
timecounter->tc_quality > 0)
DELAY(us);
}
static void
kcsan_md_unwind(void)
{
}
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