Date: Fri, 4 Apr 2003 18:05:24 -0800 (PST) From: Peter Wemm <peter@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 28122 for review Message-ID: <200304050205.h3525OCi092805@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=28122 Change 28122 by peter@peter_daintree on 2003/04/04 18:04:27 implement pte_load_clear() using native instructions Affected files ... .. //depot/projects/hammer/sys/x86_64/include/pmap.h#7 edit Differences ... ==== //depot/projects/hammer/sys/x86_64/include/pmap.h#7 (text+ko) ==== @@ -189,29 +189,8 @@ #define vtophys(va) pmap_kextract(((vm_offset_t) (va))) -#ifdef PAE - -static __inline pt_entry_t -pte_load_clear(pt_entry_t *pte) -{ - pt_entry_t r; +#define pte_load_clear(pte) atomic_readandclear_long(pte) - r = *pte; - __asm __volatile( - "1:\n" - "\tcmpxchg8b %1\n" - "\tjnz 1b" - : "+A" (r) - : "m" (*pte), "b" (0), "c" (0)); - return (r); -} - -#else - -#define pte_load_clear(pte) atomic_readandclear_int(pte) - -#endif - #endif /* @@ -228,7 +207,7 @@ pd_entry_t *pm_pdir; /* KVA of page directory */ vm_object_t pm_pteobj; /* Container for pte's */ TAILQ_HEAD(,pv_entry) pm_pvlist; /* list of mappings in pmap */ - u_int pm_active; /* active on cpus */ + u_long pm_active; /* active on cpus */ struct pmap_statistics pm_stats; /* pmap statistics */ LIST_ENTRY(pmap) pm_list; /* List of all pmaps */ #ifdef PAE
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