1 /* $NetBSD: param.h,v 1.58 2017/02/13 09:46:30 skrll 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__ 111 112 #ifdef SUN4V 113 #define MAXCPUS 256 114 #endif 115 116 /* We get stack overflows w/8K stacks in 64-bit mode */ 117 #define SSIZE 2 /* initial stack size in pages */ 118 #else 119 #define SSIZE 2 120 #endif 121 #define USPACE (SSIZE*8192) 122 123 124 /* 125 * Here are all the magic kernel virtual addresses and how they're allocated. 126 * 127 * First, the PROM is usually a fixed-sized block from 0x00000000f0000000 to 128 * 0x00000000f0100000. It also uses some space around 0x00000000fff00000 to 129 * map in device registers. The rest is pretty much ours to play with. 130 * 131 * The kernel starts at KERNBASE. Here's the layout. We use macros to set 132 * the addresses so we can relocate everything easily. We use 4MB locked TTEs 133 * to map in the kernel text and data segments. Any extra pages are recycled, 134 * so they can potentially be double-mapped. This shouldn't really be a 135 * problem since they're unused, but wild pointers can cause silent data 136 * corruption if they are in those segments. 137 * 138 * 0x0000000000000000: 64K NFO page zero 139 * 0x0000000000010000: Userland or PROM 140 * KERNBASE: 4MB (or multiple thereof) kernel text and read only 141 * data. This is mapped in the ITLB and 142 * Read-Only in the DTLB 143 * KERNBASE+0x400000: 4MB kernel data and BSS -- not in ITLB 144 * Contains context table, kernel pmap, 145 * and other important structures. 146 * KERNBASE+0x800000: Unmapped page -- redzone 147 * KERNBASE+0x802000: Process 0 stack and u-area 148 * KERNBASE+0x806000: 2 pages for pmap_copy_page and /dev/mem 149 * 150 * For 32 bit kernels: 151 * KERNBASE+0x80a000: Start of kernel VA segment 152 * KERNEND: End of kernel VA segment 153 * 154 * KERNEND+0x02000: Auxreg_va (unused?) 155 * KERNEND+0x04000: TMPMAP_VA (unused?) 156 * KERNEND+0x06000: message buffer. 157 * KERNEND+0x010000: INTSTACK -- per-cpu 64K locked TTE 158 * Contains interrupt stack (32KB), cpu_info structure 159 * and panicstack (32KB) 160 * KERNEND+0x018000: CPUINFO_VA -- cpu_info structure 161 * KERNEND+0x020000: unmapped space (top of panicstack) 162 * KERNEND+0x022000: IODEV_BASE -- begin mapping IO devices here. 163 * 0x00000000f0000000: IODEV_END -- end of device mapping space. 164 * 165 * For 64 bit kernels: 166 * 0x100000000: Start of kernel VA segment (theoretically upto 167 * the VA hole) 168 * 169 */ 170 #define KERNBASE 0x001000000 /* start of kernel virtual space */ 171 #define KERNEND 0x0e0000000 /* end of kernel virtual space */ 172 173 #define _MAXNBPG 8192 /* fixed VAs, independent of actual NBPG */ 174 175 #define MSGBUF_VA ( KERNEND + _MAXNBPG) /* 1 page REDZONE */ 176 /* 177 * Maximum message buffer size is 248k. 178 * Here's the location of the interrupt stack and CPU structure. 179 */ 180 #define INTSTACK ( KERNEND + 32*_MAXNBPG) 181 #define EINTSTACK ( INTSTACK + 4*_MAXNBPG) 182 #define CPUINFO_VA ( EINTSTACK ) 183 #define PANICSTACK ( INTSTACK + 8*_MAXNBPG) 184 #define IODEV_BASE ( INTSTACK + 9*_MAXNBPG) /* 1 page redzone */ 185 #define IODEV_END 0x0f0000000UL /* ~16 MB of iospace */ 186 187 /* 188 * Constants related to network buffer management. 189 * MCLBYTES must be no larger than NBPG (the software page size), and, 190 * on machines that exchange pages of input or output buffers with mbuf 191 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 192 * of the hardware page size. 193 */ 194 #define MSIZE 256 /* size of an mbuf */ 195 196 #ifndef MCLSHIFT 197 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 198 /* 2K cluster can hold Ether frame */ 199 #endif /* MCLSHIFT */ 200 201 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 202 203 #if !defined (MSGBUFSIZE) /* options MSGBUFSIZE=integer */ 204 #define MSGBUFSIZE (4 * NBPG) 205 #else 206 #if INTSTACK - MSGBUF_VA - MSGBUFSIZE < 0 207 #error MSGBUFSIZE is too large 208 #endif 209 #endif 210 211 /* 212 * Minimum size of the kernel kmem_arena in PAGE_SIZE-sized 213 * logical pages. 214 * For 32bit kernels: 215 * Maximum of 2.5GB on sparc64 (it must fit into KERNEND - KERNBASE, and also 216 * leave space in the kernel_map for other allocations). 217 * For 64bit kernels: 218 * Unlimited. (Practically there is a limit, we use VA starting at 4GB upto 219 * the VA-hole, but let us call this unlimited for now.) 220 */ 221 #define NKMEMPAGES_MIN_DEFAULT ((64 * 1024 * 1024) >> PAGE_SHIFT) 222 #ifdef __arch64__ 223 #define NKMEMPAGES_MAX_UNLIMITED 224 #else 225 #undef NKMEMPAGES_MAX_UNLIMITED 226 #define NKMEMPAGES_MAX_DEFAULT ((2048UL * 1024 * 1024) >> PAGE_SHIFT) 227 #endif 228 229 #ifdef _KERNEL 230 #ifndef _LOCORE 231 232 extern void delay(unsigned int); 233 #define DELAY(n) delay(n) 234 235 #ifdef __arch64__ 236 /* If we're using a 64-bit kernel use 64-bit math */ 237 #define mstohz(ms) ((ms + 0UL) * hz / 1000) 238 #endif 239 240 /* Keep this a const so compiler optimization is done */ 241 extern const int cputyp; 242 243 #if defined (SUN4US) || defined (SUN4V) 244 #define CPU_ISSUN4U (cputyp == CPU_SUN4U) 245 #define CPU_ISSUN4US (cputyp == CPU_SUN4US) 246 #define CPU_ISSUN4V (cputyp == CPU_SUN4V) 247 #else 248 #define CPU_ISSUN4U (1) 249 #define CPU_ISSUN4US (0) 250 #define CPU_ISSUN4V (0) 251 #endif 252 253 #endif /* _LOCORE */ 254 #endif /* _KERNEL */ 255 256 /* 257 * Values for the cputyp variable. 258 */ 259 #define CPU_SUN4 0 260 #define CPU_SUN4C 1 261 #define CPU_SUN4M 2 262 #define CPU_SUN4U 3 263 #define CPU_SUN4US 4 264 #define CPU_SUN4V 5 265 266 /* 267 * Shorthand CPU-type macros. Enumerate all eight cases. 268 * Let compiler optimize away code conditional on constants. 269 * 270 * On a sun4 machine, the page size is 8192, while on a sun4c and sun4m 271 * it is 4096. Therefore, in the (SUN4 && (SUN4C || SUN4M)) cases below, 272 * NBPG, PGOFSET and PGSHIFT are defined as variables which are initialized 273 * early in locore.s after the machine type has been detected. 274 * 275 * Note that whenever the macros defined below evaluate to expressions 276 * involving variables, the kernel will perform slightly worse due to the 277 * extra memory references they'll generate. 278 */ 279 280 #define CPU_ISSUN4M (0) 281 #define CPU_ISSUN4C (0) 282 #define CPU_ISSUN4 (0) 283 284 285 #define PGSHIFT 13 /* log2(NBPG) */ 286 #define NBPG (1<<PGSHIFT) /* bytes/page */ 287 #define PGOFSET (NBPG-1) /* byte offset into page */ 288 289 #define PCI_MAGIC_IO_RANGE 0x100000000LL 290