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Annotation of sys/arch/hppa/include/param.h, Revision 1.1.1.1

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