4cbbb74888
Replace a call to DELAY(1) with a new cpu_lock_delay() KPI. Currently cpu_lock_delay() is defined to DELAY(1) on all platforms. However, platforms with a DELAY() implementation that uses spin locks should implement a custom cpu_lock_delay() doesn't use locks. Reviewed by: kib MFC after: 3 days
75 lines
2.5 KiB
C
75 lines
2.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)cpu.h 5.4 (Berkeley) 5/9/91
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* from: FreeBSD: src/sys/i386/include/cpu.h,v 1.62 2001/06/29
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* $FreeBSD$
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*/
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#ifndef _MACHINE_CPU_H_
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#define _MACHINE_CPU_H_
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#include <machine/frame.h>
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#include <machine/tstate.h>
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#define TRAPF_PC(tfp) ((tfp)->tf_tpc)
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#define TRAPF_USERMODE(tfp) (((tfp)->tf_tstate & TSTATE_PRIV) == 0)
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#define cpu_getstack(td) ((td)->td_frame->tf_sp)
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#define cpu_setstack(td, sp) ((td)->td_frame->tf_sp = (sp))
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#define cpu_spinwait() /* nothing */
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#define cpu_lock_delay() DELAY(1)
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#ifdef _KERNEL
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extern char btext[];
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extern char etext[];
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void cheetah_init(u_int cpu_impl);
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void cpu_halt(void) __dead2;
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void cpu_reset(void) __dead2;
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void fork_trampoline(void);
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void swi_vm(void *v);
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void zeus_init(u_int cpu_impl);
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static __inline u_int64_t
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get_cyclecount(void)
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{
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return (rd(tick));
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}
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#endif
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#endif /* !_MACHINE_CPU_H_ */
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