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Diffstat (limited to 'sys/arch/mips/include/param.h')
| -rw-r--r-- | sys/arch/mips/include/param.h | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/sys/arch/mips/include/param.h b/sys/arch/mips/include/param.h new file mode 100644 index 00000000000..eded38fa051 --- /dev/null +++ b/sys/arch/mips/include/param.h @@ -0,0 +1,160 @@ +/* $OpenBSD: param.h,v 1.1 1998/01/28 11:14:49 pefo Exp $ */ + +/* + * Copyright (c) 1988 University of Utah. + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * 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. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * from: Utah Hdr: machparam.h 1.11 89/08/14 + * from: @(#)param.h 8.1 (Berkeley) 6/10/93 + */ + +#ifndef _MACHINE_PARAM_H_ +#define _MACHINE_PARAM_H_ + +#ifdef _KERNEL +#ifdef _LOCORE +#include <machine/psl.h> +#else +#include <machine/cpu.h> +#endif +#endif + +/* + * Machine dependent constants for MIPS machines. + */ +#define MACHINE_ARCH "mips" +#define _MACHINE_ARCH mips + +/* + * 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 NBPG 4096 /* bytes/page */ +#define PGOFSET (NBPG-1) /* byte offset into page */ +#define PGSHIFT 12 /* LOG2(NBPG) */ +#define NPTEPG (NBPG/4) + +#define NBSEG 0x400000 /* bytes/segment */ +#define SEGOFSET (NBSEG-1) /* byte offset into segment */ +#define SEGSHIFT 22 /* LOG2(NBSEG) */ + +#define KERNBASE 0x80000000 /* start of kernel virtual */ +#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) + +#define DEV_BSIZE 512 +#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ +#define BLKDEV_IOSIZE 2048 +/* XXX Maxphys temporary changed to 32K while SCSI driver is fixed. */ +#define MAXPHYS (32 * 1024) /* max raw I/O transfer size */ + +#define CLSIZE 1 +#define CLSIZELOG2 0 + +/* 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 */ +#if defined(_LOCORE) && defined(notyet) +#define UADDR 0xffffffffffffc000 /* address of u */ +#else +#define UADDR 0xffffc000 /* address of u */ +#endif +#define USPACE (UPAGES*NBPG) /* size of u-area in bytes */ +#define UVPN (UADDR>>PGSHIFT)/* virtual page number of u */ +#define KERNELSTACK (UADDR+UPAGES*NBPG) /* top of kernel stack */ + +/* + * 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 MCLSHIFT 11 +#define MCLBYTES (1 << MCLSHIFT) /* enough for whole Ethernet packet */ +#define MCLOFSET (MCLBYTES - 1) +#ifndef NMBCLUSTERS +#ifdef GATEWAY +#define NMBCLUSTERS 2048 /* map size, max cluster allocation */ +#else +#define NMBCLUSTERS 1024 /* map size, max cluster allocation */ +#endif +#endif + +/* + * Size of kernel malloc arena in CLBYTES-sized logical pages + */ +#ifndef NKMEMCLUSTERS +#define NKMEMCLUSTERS (4096*1024/CLBYTES) +#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)) + +/* + * 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) + +#define DELAY(n) { register int N = (n); while (--N > 0); } + +#endif /* _MACHINE_PARAM_H_ */ |