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

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_ */