Date: Fri, 9 May 2014 08:20:48 +0000 (UTC) From: Andrew Turner <andrew@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r265758 - projects/arm64/sys/arm64/arm64 Message-ID: <201405090820.s498KmtA026291@svn.freebsd.org>
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Author: andrew Date: Fri May 9 08:20:47 2014 New Revision: 265758 URL: http://svnweb.freebsd.org/changeset/base/265758 Log: Implement spinlocks Modified: projects/arm64/sys/arm64/arm64/machdep.c Modified: projects/arm64/sys/arm64/arm64/machdep.c ============================================================================== --- projects/arm64/sys/arm64/arm64/machdep.c Fri May 9 08:18:57 2014 (r265757) +++ projects/arm64/sys/arm64/arm64/machdep.c Fri May 9 08:20:47 2014 (r265758) @@ -218,15 +218,31 @@ void cpu_switch(struct thread *old, stru void spinlock_enter(void) { + struct thread *td; + register_t daif; - printf("spinlock_enter\n"); + td = curthread; + if (td->td_md.md_spinlock_count == 0) { + daif = intr_disable(); + td->td_md.md_spinlock_count = 1; + td->td_md.md_saved_daif = daif; + } else + td->td_md.md_spinlock_count++; + critical_enter(); } void spinlock_exit(void) { + struct thread *td; + register_t daif; - printf("spinlock_exit\n"); + td = curthread; + critical_exit(); + daif = td->td_md.md_saved_daif; + td->td_md.md_spinlock_count--; + if (td->td_md.md_spinlock_count == 0) + intr_restore(daif); } #ifndef _SYS_SYSPROTO_H_
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