Annotation of sys/arch/hppa/include/param.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: param.h,v 1.36 2007/07/15 19:25:49 kettenis Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1988-1994, The University of Utah and
! 5: * the Computer Systems Laboratory at the University of Utah (CSL).
! 6: * All rights reserved.
! 7: *
! 8: * Permission to use, copy, modify and distribute this software is hereby
! 9: * granted provided that (1) source code retains these copyright, permission,
! 10: * and disclaimer notices, and (2) redistributions including binaries
! 11: * reproduce the notices in supporting documentation, and (3) all advertising
! 12: * materials mentioning features or use of this software display the following
! 13: * acknowledgement: ``This product includes software developed by the
! 14: * Computer Systems Laboratory at the University of Utah.''
! 15: *
! 16: * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
! 17: * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
! 18: * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
! 19: *
! 20: * CSL requests users of this software to return to csl-dist@cs.utah.edu any
! 21: * improvements that they make and grant CSL redistribution rights.
! 22: *
! 23: * Utah $Hdr: param.h 1.18 94/12/16$
! 24: */
! 25:
! 26: #include <machine/cpu.h>
! 27: #include <machine/intr.h>
! 28:
! 29: /*
! 30: * Machine dependent constants for PA-RISC.
! 31: */
! 32:
! 33: #define _MACHINE hppa
! 34: #define MACHINE "hppa"
! 35: #define _MACHINE_ARCH hppa
! 36: #define MACHINE_ARCH "hppa"
! 37: #define MID_MACHINE MID_HPUX800
! 38:
! 39: /*
! 40: * Round p (pointer or byte index) up to a correctly-aligned value for all
! 41: * data types (int, long, ...). The result is u_int and must be cast to
! 42: * any desired pointer type.
! 43: */
! 44: #define ALIGNBYTES 7
! 45: #define ALIGN(p) (((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES)
! 46: #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t) - 1)) == 0)
! 47:
! 48: #define PAGE_SIZE 4096
! 49: #define PAGE_MASK (PAGE_SIZE-1)
! 50: #define PAGE_SHIFT 12
! 51:
! 52: #define NBPG 4096 /* bytes/page */
! 53: #define PGOFSET (NBPG-1) /* byte offset into page */
! 54: #define PGSHIFT 12 /* LOG2(NBPG) */
! 55:
! 56: #define KERNBASE 0x00000000 /* start of kernel virtual */
! 57:
! 58: #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
! 59: #define DEV_BSIZE (1 << DEV_BSHIFT)
! 60: #define BLKDEV_IOSIZE 2048
! 61: #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
! 62:
! 63: #define MACHINE_STACK_GROWS_UP 1 /* stack grows to higher addresses */
! 64:
! 65: #define USPACE (4 * NBPG) /* pages for user struct and kstack */
! 66: #define USPACE_ALIGN (0) /* u-area alignment 0-none */
! 67:
! 68: #ifndef MSGBUFSIZE
! 69: #define MSGBUFSIZE 2*NBPG /* default message buffer size */
! 70: #endif
! 71:
! 72: /*
! 73: * Constants related to network buffer management.
! 74: * MCLBYTES must be no larger than the software page size, and,
! 75: * on machines that exchange pages of input or output buffers with mbuf
! 76: * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
! 77: * of the hardware page size.
! 78: */
! 79: #define MSIZE 256 /* size of an mbuf */
! 80: #define MCLSHIFT 11
! 81: #define MCLBYTES (1 << MCLSHIFT) /* large enough for ether MTU */
! 82: #define MCLOFSET (MCLBYTES - 1)
! 83: #define NMBCLUSTERS 4096 /* map size, max cluster allocation */
! 84:
! 85: /*
! 86: * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
! 87: * logical pages.
! 88: */
! 89: #define NKMEMPAGES_MIN_DEFAULT ((4 * 1024 * 1024) >> PAGE_SHIFT)
! 90: #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT)
! 91:
! 92: /* pages ("clicks") (4096 bytes) to disk blocks */
! 93: #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
! 94: #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
! 95:
! 96: /* pages to bytes */
! 97: #define ctob(x) ((x) << PGSHIFT)
! 98: #define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
! 99:
! 100: #define btodb(x) ((x) >> DEV_BSHIFT)
! 101: #define dbtob(x) ((x) << DEV_BSHIFT)
! 102:
! 103: #ifdef _KERNEL
! 104: #ifdef COMPAT_HPUX
! 105: /*
! 106: * Constants/macros for HPUX multiple mapping of user address space.
! 107: * Pages in the first 256Mb are mapped in at every 256Mb segment.
! 108: */
! 109: #define HPMMMASK 0xF0000000
! 110: #define ISHPMMADDR(v) 0 /* XXX ...jef */
! 111: #define HPMMBASEADDR(v) ((unsigned)(v) & ~HPMMMASK)
! 112: #endif
! 113: #endif
! 114:
! 115: #define __SWAP_BROKEN
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