* Copyright (c) 1988 University of Utah.
* Copyright (c) 1992 The Regents of the University of California.
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department and Ralph Campbell.
* %sccs.include.redist.c%
* from: Utah $Hdr: machparam.h 1.11 89/08/14$
* @(#)param.h 7.4 (Berkeley) %G%
* Machine dependent constants for DEC Station 3100.
* 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 ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
#define NBPG 4096 /* bytes/page */
#define PGOFSET (NBPG-1) /* byte offset into page */
#define PGSHIFT 12 /* LOG2(NBPG) */
#define KERNBASE 0x80000000 /* start of kernel virtual */
#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT)
#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
#define BLKDEV_IOSIZE 2048
#define MAXPHYS (24 * 1024) /* max raw I/O transfer size */
/* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
#define SSIZE 1 /* initial stack size/NBPG */
#define SINCR 1 /* increment of stack/NBPG */
#define UPAGES 2 /* pages of u-area */
#define KERNELSTACK 0xffffe000 /* virtual address of kernel stack */
#define UADDR 0xffffc000 /* address of u */
#define UVPN (UADDR>>PGSHIFT)/* virtual page number of u */
* Constants related to network buffer management.
* MCLBYTES must be no larger than CLBYTES (the software page size), and,
* on machines that exchange pages of input or output buffers with mbuf
* clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
* of the hardware page size.
#define MSIZE 128 /* size of an mbuf */
#define MCLOFSET (MCLBYTES - 1)
#define NMBCLUSTERS 512 /* map size, max cluster allocation */
#define NMBCLUSTERS 256 /* map size, max cluster allocation */
* Size of kernel malloc arena in CLBYTES-sized logical pages
#define NKMEMCLUSTERS (2048*1024/CLBYTES)
/* pages ("clicks") (4096 bytes) to disk blocks */
#define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT))
#define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT))
#define dtob(x) ((x)<<DEV_BSHIFT)
#define ctob(x) ((x)<<PGSHIFT)
#define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT)
#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
((unsigned)(bytes) >> DEV_BSHIFT)
#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
((unsigned)(db) << 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 pmax_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
#define pmax_trunc_page(x) ((unsigned)(x) & ~(NBPG-1))
#define pmax_btop(x) ((unsigned)(x) >> PGSHIFT)
#define pmax_ptob(x) ((unsigned)(x) << PGSHIFT)
#define splclock Mach_spl2
#define splstatclock Mach_spl2
#define splsoftclock spl2
#define splstatclock spl5
#define DELAY(n) { register int N = cpuspeed * (n) / 2; while (--N > 0); }
#define DELAY(n) { register int N = (n); while (--N > 0); }
extern char *intrnames
[];
#define NINTRSLOT 45 /* # of intrcnt[] slot */