1 /* $NetBSD: param.h,v 1.50 2012/03/10 07:54:17 nakayama Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)param.h 8.1 (Berkeley) 6/11/93 41 */ 42 43 /* 44 * Copyright (c) 1996-2002 Eduardo Horvath 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 */ 65 66 #if defined(_KERNEL_OPT) 67 #include "opt_sparc_arch.h" 68 #endif 69 70 #ifdef __arch64__ 71 #define _MACHINE sparc64 72 #define MACHINE "sparc64" 73 #define _MACHINE_ARCH sparc64 74 #define MACHINE_ARCH "sparc64" 75 #define MID_MACHINE MID_SPARC64 76 #else 77 #define _MACHINE sparc 78 #define MACHINE "sparc" 79 #define _MACHINE_ARCH sparc 80 #define MACHINE_ARCH "sparc" 81 #define MID_MACHINE MID_SPARC 82 #endif 83 84 #ifdef _KERNEL /* XXX */ 85 #ifndef _LOCORE /* XXX */ 86 #include <machine/cpu.h> /* XXX */ 87 #endif /* XXX */ 88 #endif /* XXX */ 89 90 #define ALIGNBYTES32 0x7 91 #define ALIGNBYTES64 0xf 92 #define ALIGN32(p) (((u_long)(p) + ALIGNBYTES32) & ~ALIGNBYTES32) 93 94 95 /* 96 * The following variables are always defined and initialized (in locore) 97 * so independently compiled modules (e.g. LKMs) can be used irrespective 98 * of the `options SUN4?' combination a particular kernel was configured with. 99 * See also the definitions of NBPG, PGOFSET and PGSHIFT below. 100 */ 101 #if (defined(_KERNEL) || defined(_STANDALONE)) && !defined(_LOCORE) 102 extern int nbpg, pgofset, pgshift; 103 #endif 104 105 #define DEV_BSIZE 512 106 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 107 #define BLKDEV_IOSIZE 2048 108 #define MAXPHYS (64 * 1024) 109 110 #ifdef __arch64__ 111 /* We get stack overflows w/8K stacks in 64-bit mode */ 112 #define SSIZE 2 /* initial stack size in pages */ 113 #else 114 #define SSIZE 2 115 #endif 116 #define USPACE (SSIZE*8192) 117 118 119 /* 120 * Here are all the magic kernel virtual addresses and how they're allocated. 121 * 122 * First, the PROM is usually a fixed-sized block from 0x00000000f0000000 to 123 * 0x00000000f0100000. It also uses some space around 0x00000000fff00000 to 124 * map in device registers. The rest is pretty much ours to play with. 125 * 126 * The kernel starts at KERNBASE. Here's they layout. We use macros to set 127 * the addresses so we can relocate everything easily. We use 4MB locked TTEs 128 * to map in the kernel text and data segments. Any extra pages are recycled, 129 * so they can potentially be double-mapped. This shouldn't really be a 130 * problem since they're unused, but wild pointers can cause silent data 131 * corruption if they are in those segments. 132 * 133 * 0x0000000000000000: 64K NFO page zero 134 * 0x0000000000010000: Userland or PROM 135 * KERNBASE: 4MB kernel text and read only data 136 * This is mapped in the ITLB and 137 * Read-Only in the DTLB 138 * KERNBASE+0x400000: 4MB kernel data and BSS -- not in ITLB 139 * Contains context table, kernel pmap, 140 * and other important structures. 141 * KERNBASE+0x800000: Unmapped page -- redzone 142 * KERNBASE+0x802000: Process 0 stack and u-area 143 * KERNBASE+0x806000: 2 pages for pmap_copy_page and /dev/mem 144 * KERNBASE+0x80a000: Start of kernel VA segment 145 * KERNEND: End of kernel VA segment 146 * KERNEND+0x02000: Auxreg_va (unused?) 147 * KERNEND+0x04000: TMPMAP_VA (unused?) 148 * KERNEND+0x06000: message buffer. 149 * KERNEND+0x010000: INTSTACK -- per-cpu 64K locked TTE 150 * Contains interrupt stack (32KB), cpu_info structure 151 * and panicstack (32KB) 152 * KERNEND+0x018000: CPUINFO_VA -- cpu_info structure 153 * KERNEND+0x020000: unmapped space (top of panicstack) 154 * KERNEND+0x022000: IODEV_BASE -- begin mapping IO devices here. 155 * 0x00000000f0000000: IODEV_END -- end of device mapping space. 156 * 157 */ 158 #define KERNBASE 0x001000000 /* start of kernel virtual space */ 159 #define KERNEND 0x0e0000000 /* end of kernel virtual space */ 160 #define VM_MAX_KERNEL_BUF ((KERNEND-KERNBASE)/4) 161 162 #define _MAXNBPG 8192 /* fixed VAs, independent of actual NBPG */ 163 164 #define AUXREG_VA ( KERNEND + _MAXNBPG) /* 1 page REDZONE */ 165 #define TMPMAP_VA ( AUXREG_VA + _MAXNBPG) 166 #define MSGBUF_VA ( TMPMAP_VA + _MAXNBPG) 167 /* 168 * Here's the location of the interrupt stack and CPU structure. 169 */ 170 #define INTSTACK ( KERNEND + 8*_MAXNBPG) 171 #define EINTSTACK ( INTSTACK + 4*_MAXNBPG) 172 #define CPUINFO_VA ( EINTSTACK ) 173 #define PANICSTACK ( INTSTACK + 8*_MAXNBPG) 174 #define IODEV_BASE ( INTSTACK + 9*_MAXNBPG) /* 1 page redzone */ 175 #define IODEV_END 0x0f0000000UL /* ~16 MB of iospace */ 176 177 /* 178 * Constants related to network buffer management. 179 * MCLBYTES must be no larger than NBPG (the software page size), and, 180 * on machines that exchange pages of input or output buffers with mbuf 181 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 182 * of the hardware page size. 183 */ 184 #define MSIZE 256 /* size of an mbuf */ 185 186 #ifndef MCLSHIFT 187 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 188 /* 2K cluster can hold Ether frame */ 189 #endif /* MCLSHIFT */ 190 191 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 192 193 #define MSGBUFSIZE NBPG 194 195 /* 196 * Minimum size of the kernel kmem_arena in PAGE_SIZE-sized 197 * logical pages. 198 * Maximum of 2.5GB on sparc64 (it must fit into KERNEND - KERNBASE, and also 199 * leave space in the kernel_map for other allocations). 200 */ 201 #define NKMEMPAGES_MIN_DEFAULT ((64 * 1024 * 1024) >> PAGE_SHIFT) 202 #undef NKMEMPAGES_MAX_UNLIMITED 203 #define NKMEMPAGES_MAX_DEFAULT ((2048UL * 1024 * 1024) >> PAGE_SHIFT) 204 205 #ifdef _KERNEL 206 #ifndef _LOCORE 207 208 extern void delay(unsigned int); 209 #define DELAY(n) delay(n) 210 211 #ifdef __arch64__ 212 /* If we're using a 64-bit kernel use 64-bit math */ 213 #define mstohz(ms) ((ms + 0UL) * hz / 1000) 214 #endif 215 216 extern int cputyp; 217 218 #define CPU_ISSUN4U (cputyp == CPU_SUN4U) 219 #define CPU_ISSUN4US (cputyp == CPU_SUN4US) 220 #define CPU_ISSUN4V (cputyp == CPU_SUN4V) 221 222 #endif /* _LOCORE */ 223 #endif /* _KERNEL */ 224 225 /* 226 * Values for the cputyp variable. 227 */ 228 #define CPU_SUN4 0 229 #define CPU_SUN4C 1 230 #define CPU_SUN4M 2 231 #define CPU_SUN4U 3 232 #define CPU_SUN4US 4 233 #define CPU_SUN4V 5 234 235 /* 236 * Shorthand CPU-type macros. Enumerate all eight cases. 237 * Let compiler optimize away code conditional on constants. 238 * 239 * On a sun4 machine, the page size is 8192, while on a sun4c and sun4m 240 * it is 4096. Therefore, in the (SUN4 && (SUN4C || SUN4M)) cases below, 241 * NBPG, PGOFSET and PGSHIFT are defined as variables which are initialized 242 * early in locore.s after the machine type has been detected. 243 * 244 * Note that whenever the macros defined below evaluate to expressions 245 * involving variables, the kernel will perform slightly worse due to the 246 * extra memory references they'll generate. 247 */ 248 249 #define CPU_ISSUN4M (0) 250 #define CPU_ISSUN4C (0) 251 #define CPU_ISSUN4 (0) 252 253 254 #define PGSHIFT 13 /* log2(NBPG) */ 255 #define NBPG (1<<PGSHIFT) /* bytes/page */ 256 #define PGOFSET (NBPG-1) /* byte offset into page */ 257