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/* $NetBSD: mips_param.h,v 1.1 1996/05/19 17:52:18 jonathan Exp $ */
#ifndef __MIPS_PARAM_H__
#define __MIPS_PARAM_H__
/*
* Round p (pointer or byte index) up to a correctly-aligned value for all
* data types (int, long, ...). The result is u_int and must be cast to
* any desired pointer type.
*/
#define ALIGNBYTES 7
#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
#define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0)
#define NBPG 4096 /* bytes/page */
#define PGOFSET (NBPG-1) /* byte offset into page */
#define PGSHIFT 12 /* LOG2(NBPG) */
#define NPTEPG (NBPG/4)
#define PAGE_SHIFT 12
#define PAGE_SIZE (1 << PAGE_SHIFT)
#define PAGE_MASK (PAGE_SHIFT - 1)
#define NBSEG 0x400000 /* bytes/segment */
#define SEGOFSET (NBSEG-1) /* byte offset into segment */
#define SEGSHIFT 22 /* LOG2(NBSEG) */
/*
* Size of kernel malloc arena in logical pages
*/
#ifndef NKMEMCLUSTERS
#define NKMEMCLUSTERS (6*1024*1024/PAGE_SIZE)
#endif
/* pages ("clicks") (4096 bytes) to disk blocks */
#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
/* pages to bytes */
#define ctob(x) ((x) << PGSHIFT)
#define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
/* bytes to disk blocks */
#define btodb(x) ((x) >> DEV_BSHIFT)
#define dbtob(x) ((x) << DEV_BSHIFT)
/*
* Map a ``block device block'' to a file system block.
* This should be device dependent, and should use the bsize
* field from the disk label.
* For now though just use DEV_BSIZE.
*/
#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
/*
* Mach derived conversion macros
*/
#define mips_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
#define mips_trunc_page(x) ((unsigned)(x) & ~(NBPG-1))
#define mips_btop(x) ((unsigned)(x) >> PGSHIFT)
#define mips_ptob(x) ((unsigned)(x) << PGSHIFT)
#ifdef _KERNEL
#ifndef _LOCORE
typedef int spl_t;
extern spl_t splx __P((spl_t));
#define spllowersoftclock splsoftclock
extern spl_t splsoftnet __P((void)), splsoftclock __P((void));
extern spl_t splhigh __P((void));
extern spl_t spl0 __P((void)); /* XXX should not enable TC on 3min */
extern void setsoftnet __P((void)), clearsoftnet __P((void));
extern void setsoftclock __P((void)), clearsoftclock __P((void));
extern int (*Mach_splnet) __P((void)), (*Mach_splbio) __P((void)),
(*Mach_splimp) __P((void)), (*Mach_spltty) __P((void)),
(*Mach_splclock) __P((void)), (*Mach_splstatclock) __P((void)),
(*Mach_splnone) __P((void));
#define splnet() ((*Mach_splnet)())
#define splbio() ((*Mach_splbio)())
#define splimp() ((*Mach_splimp)())
#define splvm() ((*Mach_splimp)())
#define spltty() ((*Mach_spltty)())
#define splclock() ((*Mach_splclock)())
#define splstatclock() ((*Mach_splstatclock)())
extern void wbflush __P ((void)); /* XXX */
extern void delay __P((int n));
#endif /* _LOCORE */
#endif /* _KERNEL */
#endif /* __MIPS_PARAM_H__ */
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