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Annotation of src/sys/arch/sh3/include/param.h, Revision 1.24.4.1

1.24.4.1! martin      1: /*     $NetBSD: param.h,v 1.24 2019/01/07 22:00:32 jdolecek Exp $      */
1.1       itojun      2:
                      3: /*-
1.13      wiz         4:  * Copyright (c) 2002 The NetBSD Foundation, Inc. All rights reserved.
1.1       itojun      5:  * Copyright (c) 1990 The Regents of the University of California.
                      6:  * All rights reserved.
1.12      agc         7:  *
                      8:  * This code is derived from software contributed to Berkeley by
                      9:  * William Jolitz.
                     10:  *
                     11:  * Redistribution and use in source and binary forms, with or without
                     12:  * modification, are permitted provided that the following conditions
                     13:  * are met:
                     14:  * 1. Redistributions of source code must retain the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer.
                     16:  * 2. Redistributions in binary form must reproduce the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer in the
                     18:  *    documentation and/or other materials provided with the distribution.
                     19:  * 3. Neither the name of the University nor the names of its contributors
                     20:  *    may be used to endorse or promote products derived from this software
                     21:  *    without specific prior written permission.
                     22:  *
                     23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     33:  * SUCH DAMAGE.
                     34:  *
                     35:  *     @(#)param.h     5.8 (Berkeley) 6/28/91
                     36:  */
                     37:
1.1       itojun     38: /*
1.8       uch        39:  * SuperH dependent constants.
1.1       itojun     40:  */
                     41:
1.11      uch        42: #ifndef _SH3_PARAM_H_
                     43: #define        _SH3_PARAM_H_
                     44:
1.8       uch        45: #if defined(_KERNEL) && !defined(_LOCORE)
1.17      pooka      46: #include <machine/cpu.h>
1.1       itojun     47: #endif
                     48:
1.11      uch        49: /* NetBSD/sh3 is 4KB page */
                     50: #define        PGSHIFT                 12
                     51: #define        NBPG                    (1 << PGSHIFT)
                     52: #define        PGOFSET                 (NBPG - 1)
                     53:
1.8       uch        54: /*
                     55:  * u-space.
                     56:  */
1.9       uch        57: #define        UPAGES          3               /* pages of u-area */
1.1       itojun     58: #define        USPACE          (UPAGES * NBPG) /* total size of u-area */
1.9       uch        59: #if UPAGES == 1
                     60: #error "too small u-area"
                     61: #elif UPAGES == 2
                     62: #define        P1_STACK        /* kernel stack is P1-area */
                     63: #else
                     64: #undef P1_STACK        /* kernel stack is P3-area */
                     65: #endif
1.1       itojun     66:
                     67: #ifndef MSGBUFSIZE
1.10      uch        68: #define        MSGBUFSIZE      NBPG            /* default message buffer size */
1.1       itojun     69: #endif
                     70:
                     71: /*
                     72:  * Constants related to network buffer management.
1.2       ragge      73:  * MCLBYTES must be no larger than NBPG (the software page size), and,
1.1       itojun     74:  * on machines that exchange pages of input or output buffers with mbuf
                     75:  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
                     76:  * of the hardware page size.
                     77:  */
1.4       itojun     78: #define        MSIZE           256             /* size of an mbuf */
1.1       itojun     79:
                     80: #ifndef MCLSHIFT
1.6       simonb     81: #define        MCLSHIFT        11              /* convert bytes to m_buf clusters */
                     82:                                        /* 2K cluster can hold Ether frame */
1.1       itojun     83: #endif /* MCLSHIFT */
                     84:
                     85: #define        MCLBYTES        (1 << MCLSHIFT) /* size of a m_buf cluster */
                     86:
                     87: /*
1.3       thorpej    88:  * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
                     89:  * logical pages.
1.1       itojun     90:  */
1.23      para       91: #define        NKMEMPAGES_MIN_DEFAULT  ((16 * 1024 * 1024) >> PAGE_SHIFT)
                     92: #define        NKMEMPAGES_MAX_DEFAULT  ((128 * 1024 * 1024) >> PAGE_SHIFT)
1.1       itojun     93:
1.24.4.1! martin     94: /* Default audio blocksize in msec.  See sys/dev/audio/audio.c */
        !            95: #if defined(_KERNEL)
        !            96: #define        __AUDIO_BLK_MS (40)
        !            97: #endif
        !            98:
1.11      uch        99: #endif /* !_SH3_PARAM_H_ */

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