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mips_param.h revision 1.3 
      1 /*	$NetBSD: mips_param.h,v 1.3 1997/06/08 10:46:04 jonathan Exp $	*/
      2 
      3 /*
      4  * Architecture name.
      5  */
      6 #define	_MACHINE_ARCH	mips
      7 #define	MACHINE_ARCH	"mips"
      8 
      9 /*
     10  * Round p (pointer or byte index) up to a correctly-aligned value for all
     11  * data types (int, long, ...).   The result is u_int and must be cast to
     12  * any desired pointer type.
     13  */
     14 #define	ALIGNBYTES	7
     15 #define	ALIGN(p)	(((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
     16 #define ALIGNED_POINTER(p,t)	((((u_long)(p)) & (sizeof(t)-1)) == 0)
     17 
     18 #define	NBPG		4096		/* bytes/page */
     19 #define	PGOFSET		(NBPG-1)	/* byte offset into page */
     20 #define	PGSHIFT		12		/* LOG2(NBPG) */
     21 #define	NPTEPG		(NBPG/4)
     22 
     23 #define NBSEG		0x400000	/* bytes/segment */
     24 #define	SEGOFSET	(NBSEG-1)	/* byte offset into segment */
     25 #define	SEGSHIFT	22		/* LOG2(NBSEG) */
     26 
     27 /*
     28  * Size of kernel malloc arena in CLBYTES-sized logical pages
     29  */
     30 #ifndef NKMEMCLUSTERS
     31 #define	NKMEMCLUSTERS	(512*1024/CLBYTES)
     32 #endif
     33 
     34 /* pages ("clicks") (4096 bytes) to disk blocks */
     35 #define	ctod(x)		((x) << (PGSHIFT - DEV_BSHIFT))
     36 #define	dtoc(x)		((x) >> (PGSHIFT - DEV_BSHIFT))
     37 
     38 /* pages to bytes */
     39 #define	ctob(x)		((x) << PGSHIFT)
     40 #define btoc(x)		(((x) + PGOFSET) >> PGSHIFT)
     41 
     42 /* bytes to disk blocks */
     43 #define	btodb(x)	((x) >> DEV_BSHIFT)
     44 #define dbtob(x)	((x) << DEV_BSHIFT)
     45 
     46 /*
     47  * Map a ``block device block'' to a file system block.
     48  * This should be device dependent, and should use the bsize
     49  * field from the disk label.
     50  * For now though just use DEV_BSIZE.
     51  */
     52 #define	bdbtofsb(bn)	((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
     53 
     54 /*
     55  * Mach derived conversion macros
     56  */
     57 #define mips_round_page(x)	((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
     58 #define mips_trunc_page(x)	((unsigned)(x) & ~(NBPG-1))
     59 #define mips_btop(x)		((unsigned)(x) >> PGSHIFT)
     60 #define mips_ptob(x)		((unsigned)(x) << PGSHIFT)
     61 
     62 #ifdef _KERNEL
     63 #ifndef _LOCORE
     64 typedef int spl_t;
     65 extern spl_t splx __P((spl_t));
     66 extern spl_t splsoftnet __P((void)), splsoftclock __P((void));
     67 extern spl_t splhigh __P((void));
     68 extern spl_t spl0 __P((void));	/* XXX should not enable TC on 3min */
     69 
     70 extern void setsoftnet __P((void)), clearsoftnet __P((void));
     71 extern void setsoftclock __P((void)), clearsoftclock __P((void));
     72 
     73 
     74 extern int (*Mach_splnet) __P((void)), (*Mach_splbio) __P((void)),
     75 	   (*Mach_splimp) __P((void)), (*Mach_spltty) __P((void)),
     76 	   (*Mach_splclock) __P((void)), (*Mach_splstatclock) __P((void)),
     77 	   (*Mach_splnone) __P((void));
     78 #define	splnet()	((*Mach_splnet)())
     79 #define	splbio()	((*Mach_splbio)())
     80 #define	splimp()	((*Mach_splimp)())
     81 #define	spltty()	((*Mach_spltty)())
     82 #define	splclock()	((*Mach_splclock)())
     83 #define	splstatclock()	((*Mach_splstatclock)())
     84 
     85 extern void wbflush __P ((void));		/* XXX */
     86 extern void delay __P((int n));
     87 
     88 #endif	/* _LOCORE */
     89 #endif	/* _KERNEL */
     90