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Annotation of sys/arch/powerpc/include/param.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: param.h,v 1.29 2007/05/28 21:02:49 thib Exp $ */
        !             2: /*     $NetBSD: param.h,v 1.1 1996/09/30 16:34:28 ws Exp $     */
        !             3:
        !             4: /*-
        !             5:  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
        !             6:  * Copyright (C) 1995, 1996 TooLs GmbH.
        !             7:  * All rights reserved.
        !             8:  *
        !             9:  * Redistribution and use in source and binary forms, with or without
        !            10:  * modification, are permitted provided that the following conditions
        !            11:  * are met:
        !            12:  * 1. Redistributions of source code must retain the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer.
        !            14:  * 2. Redistributions in binary form must reproduce the above copyright
        !            15:  *    notice, this list of conditions and the following disclaimer in the
        !            16:  *    documentation and/or other materials provided with the distribution.
        !            17:  * 3. All advertising materials mentioning features or use of this software
        !            18:  *    must display the following acknowledgement:
        !            19:  *     This product includes software developed by TooLs GmbH.
        !            20:  * 4. The name of TooLs GmbH may not be used to endorse or promote products
        !            21:  *    derived from this software without specific prior written permission.
        !            22:  *
        !            23:  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
        !            24:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
        !            25:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
        !            26:  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
        !            27:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
        !            28:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
        !            29:  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
        !            30:  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
        !            31:  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
        !            32:  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
        !            33:  */
        !            34:
        !            35: #ifndef        _POWERPC_PARAM_H_
        !            36: #define        _POWERPC_PARAM_H_
        !            37:
        !            38: #ifdef _KERNEL
        !            39: #ifndef        _LOCORE
        !            40: #include <machine/cpu.h>
        !            41: #endif /* _LOCORE */
        !            42: #endif
        !            43:
        !            44: /*
        !            45:  * Machine dependent constants for PowerPC (32-bit only currently)
        !            46:  */
        !            47: #define        MACHINE_ARCH    "powerpc"
        !            48: #define        _MACHINE_ARCH   powerpc
        !            49:
        !            50: #define        MID_MACHINE     MID_POWERPC
        !            51:
        !            52: #define        ALIGNBYTES      (sizeof(double) - 1)
        !            53: #define        ALIGN(p)        (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES)
        !            54: #define ALIGNED_POINTER(p,t)   ((((u_long)(p)) & (sizeof(t)-1)) == 0)
        !            55:
        !            56: #define        PAGE_SHIFT      12
        !            57: #define        PAGE_SIZE       4096
        !            58: #define        PAGE_MASK       (PAGE_SIZE - 1)
        !            59: #define        PGSHIFT         PAGE_SHIFT
        !            60: #define        NBPG            PAGE_SIZE
        !            61: #define        PGOFSET         PAGE_MASK
        !            62:
        !            63: #define        DEV_BSHIFT      9               /* log2(DEV_BSIZE) */
        !            64: #define        DEV_BSIZE       (1 << DEV_BSHIFT)
        !            65: #define        BLKDEV_IOSIZE   2048
        !            66: #define        MAXPHYS         (64 * 1024)     /* max raw I/O transfer size */
        !            67:
        !            68: #define        UPAGES          4
        !            69: #define        USPACE          (UPAGES * NBPG)
        !            70: #define        USPACE_ALIGN    (0)             /* u-area alignment 0-none */
        !            71:
        !            72: /*
        !            73:  * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
        !            74:  * logical pages.
        !            75:  */
        !            76: #define        NKMEMPAGES_MIN_DEFAULT  ((4 * 1024 * 1024) >> PAGE_SHIFT)
        !            77: #define        NKMEMPAGES_MAX_DEFAULT  ((64 * 1024 * 1024) >> PAGE_SHIFT)
        !            78:
        !            79: /*
        !            80:  * Constants related to network buffer management.
        !            81:  */
        !            82: #define        NMBCLUSTERS     4096            /* map size, max cluster allocation */
        !            83:
        !            84: /*
        !            85:  * pages ("clicks") to disk blocks
        !            86:  */
        !            87: #define        ctod(x)         ((x) << (PGSHIFT - DEV_BSHIFT))
        !            88: #define        dtoc(x)         ((x) >> (PGSHIFT - DEV_BSHIFT))
        !            89: /*
        !            90:  * bytes to pages
        !            91:  */
        !            92: #define        ctob(x)         ((x) << PGSHIFT)
        !            93: #define        btoc(x)         (((x) + PGOFSET) >> PGSHIFT)
        !            94:
        !            95: /*
        !            96:  * bytes to disk blocks
        !            97:  */
        !            98: #define        dbtob(x)        ((x) << DEV_BSHIFT)
        !            99: #define        btodb(x)        ((x) >> DEV_BSHIFT)
        !           100:
        !           101: /*
        !           102:  * Segment handling stuff
        !           103:  */
        !           104: #define        PPC_SEGMENT_LENGTH      0x10000000
        !           105: #define        PPC_SEGMENT_MASK        0xf0000000
        !           106:
        !           107: /*
        !           108:  * Fixed segments
        !           109:  */
        !           110: #define        PPC_USER_SR             13
        !           111: #define        PPC_KERNEL_SR   14
        !           112: #define        PPC_KERNEL_SEG0 0xfffff0
        !           113: #define        PPC_KERNEL_SEGMENT      (PPC_KERNEL_SEG0 + PPC_KERNEL_SR)
        !           114: #define        PPC_USER_ADDR   ((void *)(PPC_USER_SR << ADDR_SR_SHIFT))
        !           115:
        !           116: /*
        !           117:  * Some system constants
        !           118:  */
        !           119: #ifndef        NPMAPS
        !           120: #define        NPMAPS          32768   /* Number of pmaps in system */
        !           121: #endif
        !           122:
        !           123: /*
        !           124:  * Temporary kludge till we do (ov)bcopy in assembler
        !           125:  */
        !           126: #define        ovbcopy bcopy
        !           127:
        !           128: #endif /* _POWERPC_PARAM_H_ */