mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-23 11:18:54 +00:00
77 lines
1.5 KiB
C
77 lines
1.5 KiB
C
/*-
|
|
* Copyright (c) 2002 Matthew Dillon. This code is distributed under
|
|
* the BSD copyright, /usr/src/COPYRIGHT.
|
|
*
|
|
* This file contains prototypes and high-level inlines related to
|
|
* machine-level critical function support:
|
|
*
|
|
* cpu_critical_enter() - inlined
|
|
* cpu_critical_exit() - inlined
|
|
* cpu_critical_fork_exit() - prototyped
|
|
* cpu_thread_link() - prototyped
|
|
* related support functions residing
|
|
* in <arch>/<arch>/critical.c - prototyped
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _MACHINE_CRITICAL_H_
|
|
#define _MACHINE_CRITICAL_H_
|
|
|
|
__BEGIN_DECLS
|
|
|
|
/*
|
|
* Prototypes - see <arch>/<arch>/critical.c
|
|
*/
|
|
void cpu_critical_fork_exit(void);
|
|
void cpu_thread_link(struct thread *td);
|
|
|
|
#ifdef __GNUC__
|
|
|
|
/*
|
|
* cpu_critical_enter:
|
|
*
|
|
* This routine is called from critical_enter() on the 0->1 transition
|
|
* of td_critnest, prior to it being incremented to 1.
|
|
*/
|
|
|
|
static __inline void
|
|
cpu_critical_enter(void)
|
|
{
|
|
u_int msr;
|
|
struct thread *td = curthread;
|
|
|
|
msr = mfmsr();
|
|
td->td_md.md_savecrit = msr;
|
|
msr &= ~PSL_EE;
|
|
mtmsr(msr);
|
|
}
|
|
|
|
/*
|
|
* cpu_critical_exit:
|
|
*
|
|
* This routine is called from critical_exit() on a 1->0 transition
|
|
* of td_critnest, after it has been decremented to 0. We are
|
|
* exiting the last critical section.
|
|
*/
|
|
static __inline void
|
|
cpu_critical_exit(void)
|
|
{
|
|
struct thread *td = curthread;
|
|
|
|
mtmsr(td->td_md.md_savecrit);
|
|
}
|
|
|
|
|
|
#else /* !__GNUC__ */
|
|
|
|
void cpu_critical_enter(void)
|
|
void cpu_critical_exit(void)
|
|
|
|
#endif /* __GNUC__ */
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* !_MACHINE_CRITICAL_H_ */
|
|
|