1 /* $NetBSD: param.h,v 1.22 2010/03/22 02:14:28 mrg Exp $ */ 2 3 /*- 4 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 5 * Copyright (C) 1995, 1996 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #ifndef _POWERPC_PARAM_H 35 #define _POWERPC_PARAM_H 36 37 #ifdef _KERNEL 38 #if defined(_KERNEL_OPT) 39 #include "opt_ppcarch.h" 40 #endif 41 #ifndef _LOCORE 42 #include <machine/cpu.h> 43 #endif /* _LOCORE */ 44 #endif 45 46 /* 47 * Machine dependent constants for PowerPC (32-bit only currently) 48 */ 49 #ifndef MACHINE 50 #define MACHINE "powerpc" 51 #endif 52 #define MACHINE_ARCH "powerpc" 53 #define MID_MACHINE MID_POWERPC 54 55 #define ALIGNBYTES (sizeof(double) - 1) 56 #define ALIGN(p) (((u_long)(p) + ALIGNBYTES) & ~ALIGNBYTES) 57 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 58 59 #ifdef PPC_IBM4XX 60 #define PGSHIFT 14 /* Use 16KB to reduce TLB thrashing */ 61 #define UPAGES 1 62 #else 63 #define PGSHIFT 12 64 #define UPAGES 4 65 #endif 66 #define NBPG (1 << PGSHIFT) /* Page size */ 67 #define PGOFSET (NBPG - 1) 68 69 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 70 #define DEV_BSIZE (1 << DEV_BSHIFT) 71 #define BLKDEV_IOSIZE NBPG 72 #ifndef MAXPHYS 73 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 74 #endif 75 76 #define USPACE (UPAGES * NBPG) 77 78 #ifndef MSGBUFSIZE 79 #define MSGBUFSIZE (2*NBPG) /* default message buffer size */ 80 #endif 81 82 #ifndef KERNBASE 83 #define KERNBASE 0x100000 84 #endif 85 86 /* 87 * Constants related to network buffer management. 88 * MCLBYTES must be no larger than NBPG (the software page size), and, 89 * on machines that exchange pages of input or output buffers with mbuf 90 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 91 * of the hardware page size. 92 */ 93 #ifndef MSIZE 94 #ifdef _LP64 95 #define MSIZE 512 /* size of an mbuf */ 96 #else /* _LP64 */ 97 #define MSIZE 256 /* size of an mbuf */ 98 #endif /* _LP64 */ 99 #endif 100 #ifndef MCLSHIFT 101 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 102 #endif 103 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 104 105 /* 106 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 107 * logical pages. 108 */ 109 #ifndef NKMEMPAGES_MIN_DEFAULT 110 #define NKMEMPAGES_MIN_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT) 111 #endif 112 #ifndef NKMEMPAGES_MAX_DEFAULT 113 #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT) 114 #endif 115 116 #endif /* _POWERPC_PARAM_H_ */ 117