1997-02-28 05:24:41 +03:00
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/* $NetBSD: mips_param.h,v 1.2 1997/02/28 02:24:41 jonathan Exp $ */
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1996-05-19 21:52:18 +04:00
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/*
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* Round p (pointer or byte index) up to a correctly-aligned value for all
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* data types (int, long, ...). The result is u_int and must be cast to
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* any desired pointer type.
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*/
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#define ALIGNBYTES 7
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#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
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1997-02-28 05:24:41 +03:00
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#define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0)
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1996-05-19 21:52:18 +04:00
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#define NBPG 4096 /* bytes/page */
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#define PGOFSET (NBPG-1) /* byte offset into page */
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#define PGSHIFT 12 /* LOG2(NBPG) */
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#define NPTEPG (NBPG/4)
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#define NBSEG 0x400000 /* bytes/segment */
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#define SEGOFSET (NBSEG-1) /* byte offset into segment */
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#define SEGSHIFT 22 /* LOG2(NBSEG) */
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/*
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* Size of kernel malloc arena in CLBYTES-sized logical pages
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*/
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#ifndef NKMEMCLUSTERS
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#define NKMEMCLUSTERS (512*1024/CLBYTES)
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#endif
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/* pages ("clicks") (4096 bytes) to disk blocks */
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#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
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#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
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/* pages to bytes */
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#define ctob(x) ((x) << PGSHIFT)
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#define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
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/* bytes to disk blocks */
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#define btodb(x) ((x) >> DEV_BSHIFT)
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#define dbtob(x) ((x) << DEV_BSHIFT)
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/*
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* Map a ``block device block'' to a file system block.
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* This should be device dependent, and should use the bsize
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* field from the disk label.
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* For now though just use DEV_BSIZE.
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*/
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#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
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/*
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* Mach derived conversion macros
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*/
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#define mips_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
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#define mips_trunc_page(x) ((unsigned)(x) & ~(NBPG-1))
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#define mips_btop(x) ((unsigned)(x) >> PGSHIFT)
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#define mips_ptob(x) ((unsigned)(x) << PGSHIFT)
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#ifdef _KERNEL
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#ifndef _LOCORE
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typedef int spl_t;
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extern spl_t splx __P((spl_t));
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extern spl_t splsoftnet __P((void)), splsoftclock __P((void));
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extern spl_t splhigh __P((void));
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extern spl_t spl0 __P((void)); /* XXX should not enable TC on 3min */
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extern void setsoftnet __P((void)), clearsoftnet __P((void));
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extern void setsoftclock __P((void)), clearsoftclock __P((void));
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extern int (*Mach_splnet) __P((void)), (*Mach_splbio) __P((void)),
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(*Mach_splimp) __P((void)), (*Mach_spltty) __P((void)),
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(*Mach_splclock) __P((void)), (*Mach_splstatclock) __P((void)),
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(*Mach_splnone) __P((void));
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#define splnet() ((*Mach_splnet)())
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#define splbio() ((*Mach_splbio)())
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#define splimp() ((*Mach_splimp)())
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#define spltty() ((*Mach_spltty)())
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#define splclock() ((*Mach_splclock)())
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#define splstatclock() ((*Mach_splstatclock)())
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extern void wbflush __P ((void)); /* XXX */
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extern void delay __P((int n));
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#endif /* _LOCORE */
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#endif /* _KERNEL */
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