mips_param.h revision 1.33.6.1
1 /* $NetBSD: mips_param.h,v 1.33.6.1 2013/06/23 06:20:08 tls Exp $ */ 2 3 /*- 4 * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 #ifdef _KERNEL 29 #include <machine/cpu.h> 30 #endif 31 32 /* 33 * No reason this can't be common 34 */ 35 #if defined(__MIPSEB__) 36 # if defined(__mips_n32) || defined(__mips_n64) 37 # define _MACHINE_ARCH mips64eb 38 # define MACHINE_ARCH "mips64eb" 39 # define _MACHINE32_ARCH mipseb 40 # define MACHINE32_ARCH "mipseb" 41 # else 42 # define _MACHINE_ARCH mipseb 43 # define MACHINE_ARCH "mipseb" 44 # endif 45 #elif defined(__MIPSEL__) 46 # if defined(__mips_n32) || defined(__mips_n64) 47 # define _MACHINE_ARCH mips64el 48 # define MACHINE_ARCH "mips64el" 49 # define _MACHINE32_ARCH mipsel 50 # define MACHINE32_ARCH "mipsel" 51 # else 52 # define _MACHINE_ARCH mipsel 53 # define MACHINE_ARCH "mipsel" 54 #endif 55 #else 56 #error neither __MIPSEL__ nor __MIPSEB__ are defined. 57 #endif 58 59 /* 60 * Userland code should be using uname/sysctl to get MACHINE so simply 61 * export a generic MACHINE of "mips" 62 */ 63 #ifndef _KERNEL 64 #undef MACHINE 65 #define MACHINE "mips" 66 #endif 67 68 #define ALIGNBYTES32 (sizeof(double) - 1) 69 #define ALIGN32(p) (((uintptr_t)(p) + ALIGNBYTES32) &~ALIGNBYTES32) 70 71 /* 72 * On mips, UPAGES is fixed by sys/arch/mips/mips/locore code 73 * to be the number of per-process-wired kernel-stack pages/PTES. 74 */ 75 76 #define SSIZE 1 /* initial stack size/NBPG */ 77 #define SINCR 1 /* increment of stack/NBPG */ 78 79 #ifdef ENABLE_MIPS_16KB_PAGE 80 #define UPAGES 1 /* pages of u-area */ 81 #define USPACE (UPAGES*NBPG) /* size of u-area in bytes */ 82 #elif defined(ENABLE_MIPS_4KB_PAGE) || 1 83 #define UPAGES 2 /* pages of u-area */ 84 #define USPACE (UPAGES*NBPG) /* size of u-area in bytes */ 85 #else 86 #error ENABLE_MIPS_xKB_PAGE not defined 87 #endif 88 #define USPACE_ALIGN USPACE /* make sure it starts on a even VA */ 89 90 #ifndef MSGBUFSIZE 91 #define MSGBUFSIZE NBPG /* default message buffer size */ 92 #endif 93 94 #ifndef COHERENCY_UNIT 95 #define COHERENCY_UNIT 32 /* MIPS cachelines are usually 32 bytes */ 96 #endif 97 98 #ifdef ENABLE_MIPS_16KB_PAGE 99 #define NBPG 16384 /* bytes/page */ 100 #define PGSHIFT 14 /* LOG2(NBPG) */ 101 #else 102 #define NBPG 4096 /* bytes/page */ 103 #define PGSHIFT 12 /* LOG2(NBPG) */ 104 #endif 105 #define PGOFSET (NBPG-1) /* byte offset into page */ 106 #define NPTEPG (NBPG/4) 107 108 #define NBSEG (NBPG*NPTEPG) /* bytes/segment */ 109 #define SEGOFSET (NBSEG-1) /* byte offset into segment */ 110 #define SEGSHIFT (PGSHIFT+(PGSHIFT-2)) /* LOG2(NBSEG) */ 111 112 #ifdef _LP64 113 #define NSEGPG (NBPG/8) 114 #define NBXSEG (NSEGPG*NBSEG) /* bytes/xsegment */ 115 #define XSEGOFSET (NBSEG-1) /* byte offset into segment */ 116 #define XSEGSHIFT (SEGSHIFT+(PGSHIFT-3)) /* LOG2(NBXSEG) */ 117 #endif 118 119 /* 120 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 121 * logical pages. 122 */ 123 #define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT) 124 #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT) 125 126 /* 127 * Mach derived conversion macros 128 */ 129 #define mips_round_page(x) ((((uintptr_t)(x)) + NBPG - 1) & ~(NBPG-1)) 130 #define mips_trunc_page(x) ((uintptr_t)(x) & ~(NBPG-1)) 131 #define mips_btop(x) ((paddr_t)(x) >> PGSHIFT) 132 #define mips_ptob(x) ((paddr_t)(x) << PGSHIFT) 133 134 #ifdef __MIPSEL__ 135 #define MID_MACHINE MID_PMAX /* MID_PMAX (little-endian) */ 136 #endif 137 #ifdef __MIPSEB__ 138 #define MID_MACHINE MID_MIPS /* MID_MIPS (big-endian) */ 139 #endif 140 141 /* 142 * Constants related to network buffer management. 143 * MCLBYTES must be no larger than NBPG (the software page size), and, 144 * on machines that exchange pages of input or output buffers with mbuf 145 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 146 * of the hardware page size. 147 */ 148 #ifndef MSIZE 149 #ifdef _LP64 150 #define MSIZE 512 /* size of an mbuf */ 151 #else 152 #define MSIZE 256 /* size of an mbuf */ 153 #endif 154 155 #ifndef MCLSHIFT 156 # define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 157 #endif /* MCLSHIFT */ 158 159 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 160 161 #endif 162
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