1 /* $NetBSD: param.h,v 1.63 2025/04/24 11:01:27 martin 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_param.h" 68 #include "opt_sparc_arch.h" 69 #endif 70 71 #ifdef __arch64__ 72 #define _MACHINE sparc64 73 #define MACHINE "sparc64" 74 #define _MACHINE_ARCH sparc64 75 #define MACHINE_ARCH "sparc64" 76 #define MID_MACHINE MID_SPARC64 77 #else 78 #define _MACHINE sparc 79 #define MACHINE "sparc" 80 #define _MACHINE_ARCH sparc 81 #define MACHINE_ARCH "sparc" 82 #define MID_MACHINE MID_SPARC 83 #endif 84 85 #ifdef _KERNEL /* XXX */ 86 #ifndef _LOCORE /* XXX */ 87 #include <machine/cpu.h> /* XXX */ 88 #endif /* XXX */ 89 #endif /* XXX */ 90 91 #define ALIGNBYTES32 0x7 92 #define ALIGNBYTES64 0xf 93 #define ALIGN32(p) (((u_long)(p) + ALIGNBYTES32) & ~ALIGNBYTES32) 94 95 96 /* 97 * The following variables are always defined and initialized (in locore) 98 * so independently compiled modules (e.g. LKMs) can be used irrespective 99 * of the `options SUN4?' combination a particular kernel was configured with. 100 * See also the definitions of NBPG, PGOFSET and PGSHIFT below. 101 */ 102 #if (defined(_KERNEL) || defined(_STANDALONE)) && !defined(_LOCORE) 103 extern int nbpg, pgofset, pgshift; 104 #endif 105 106 #ifdef __arch64__ 107 108 #ifdef SUN4V 109 #define MAXCPUS 256 110 #endif 111 112 /* We get stack overflows w/8K stacks in 64-bit mode */ 113 #define SSIZE 2 /* initial stack size in pages */ 114 #else 115 #define SSIZE 2 116 #endif 117 #define USPACE (SSIZE*8192) 118 119 120 /* 121 * Here are all the magic kernel virtual addresses and how they're allocated. 122 * 123 * First, the PROM is usually a fixed-sized block from 0x00000000f0000000 to 124 * 0x00000000f0100000. It also uses some space around 0x00000000fff00000 to 125 * map in device registers. The rest is pretty much ours to play with. 126 * 127 * The kernel starts at KERNBASE. Here's the layout. We use macros to set 128 * the addresses so we can relocate everything easily. We use 4MB locked TTEs 129 * to map in the kernel text and data segments. Any extra pages are recycled, 130 * so they can potentially be double-mapped. This shouldn't really be a 131 * problem since they're unused, but wild pointers can cause silent data 132 * corruption if they are in those segments. 133 * 134 * 0x0000000000000000: 64K NFO page zero 135 * 0x0000000000010000: Userland or PROM 136 * KERNBASE: 4MB (or multiple thereof) kernel text and read only 137 * data. This is mapped in the ITLB and 138 * Read-Only in the DTLB 139 * KERNBASE+0x400000: 4MB kernel data and BSS -- not in ITLB 140 * Contains context table, kernel pmap, 141 * and other important structures. 142 * KERNBASE+0x800000: Unmapped page -- redzone 143 * KERNBASE+0x802000: Process 0 stack and u-area 144 * KERNBASE+0x806000: 2 pages for pmap_copy_page and /dev/mem 145 * 146 * For 32 bit kernels: 147 * KERNBASE+0x80a000: Start of kernel VA segment 148 * KERNEND: End of kernel VA segment 149 * 150 * KERNEND+0x02000: Auxreg_va (unused?) 151 * KERNEND+0x04000: TMPMAP_VA (unused?) 152 * KERNEND+0x06000: message buffer. 153 * KERNEND+0x010000: INTSTACK -- per-cpu 64K locked TTE 154 * Contains interrupt stack (32KB), cpu_info structure 155 * and panicstack (32KB) 156 * KERNEND+0x018000: CPUINFO_VA -- cpu_info structure 157 * KERNEND+0x020000: unmapped space (top of panicstack) 158 * KERNEND+0x022000: IODEV_BASE -- begin mapping IO devices here. 159 * 0x00000000f0000000: IODEV_END -- end of device mapping space. 160 * 161 * For 64 bit kernels: 162 * 0x100000000: Start of kernel VA segment (theoretically upto 163 * the VA hole) 164 * 165 */ 166 #define KERNBASE 0x001000000 /* start of kernel virtual space */ 167 #define KERNEND 0x0e0000000 /* end of kernel virtual space */ 168 169 #define _MAXNBPG 8192 /* fixed VAs, independent of actual NBPG */ 170 171 #define MSGBUF_VA ( KERNEND + _MAXNBPG) /* 1 page REDZONE */ 172 /* 173 * Maximum message buffer size is 248k. 174 * Here's the location of the interrupt stack and CPU structure. 175 */ 176 #define INTSTACK ( KERNEND + 32*_MAXNBPG) 177 #define EINTSTACK ( INTSTACK + 4*_MAXNBPG) 178 #define CPUINFO_VA ( EINTSTACK ) 179 #define PANICSTACK ( INTSTACK + 8*_MAXNBPG) 180 #define IODEV_BASE ( INTSTACK + 9*_MAXNBPG) /* 1 page redzone */ 181 #define IODEV_END 0x0f0000000UL /* ~16 MB of iospace */ 182 183 /* 184 * Constants related to network buffer management. 185 * MCLBYTES must be no larger than NBPG (the software page size), and, 186 * on machines that exchange pages of input or output buffers with mbuf 187 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 188 * of the hardware page size. 189 */ 190 #define MSIZE 256 /* size of an mbuf */ 191 192 #ifndef MCLSHIFT 193 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 194 /* 2K cluster can hold Ether frame */ 195 #endif /* MCLSHIFT */ 196 197 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 198 199 #if !defined (MSGBUFSIZE) /* options MSGBUFSIZE=integer */ 200 #define MSGBUFSIZE (4 * NBPG) 201 #else 202 #if INTSTACK - MSGBUF_VA - MSGBUFSIZE < 0 203 #error MSGBUFSIZE is too large 204 #endif 205 #endif 206 207 /* 208 * Minimum size of the kernel kmem_arena in PAGE_SIZE-sized 209 * logical pages. 210 * For 32bit kernels: 211 * Maximum of 2.5GB on sparc64 (it must fit into KERNEND - KERNBASE, and also 212 * leave space in the kernel_map for other allocations). 213 * For 64bit kernels: 214 * Unlimited. (Practically there is a limit, we use VA starting at 4GB upto 215 * the VA-hole, but let us call this unlimited for now.) 216 */ 217 #define NKMEMPAGES_MIN_DEFAULT ((64 * 1024 * 1024) >> PAGE_SHIFT) 218 #ifdef __arch64__ 219 #define NKMEMPAGES_MAX_UNLIMITED 220 #else 221 #undef NKMEMPAGES_MAX_UNLIMITED 222 #define NKMEMPAGES_MAX_DEFAULT ((2048UL * 1024 * 1024) >> PAGE_SHIFT) 223 #endif 224 225 #ifdef _KERNEL 226 #ifndef _LOCORE 227 228 #ifndef __HIDE_DELAY 229 extern void delay(unsigned int); 230 #define DELAY(n) delay(n) 231 #endif /* __HIDE_DELAY */ 232 233 /* Keep this a const so compiler optimization is done */ 234 extern const int cputyp; 235 236 #if defined (SUN4US) || defined (SUN4V) 237 #define CPU_ISSUN4U (cputyp == CPU_SUN4U) 238 #define CPU_ISSUN4US (cputyp == CPU_SUN4US) 239 #define CPU_ISSUN4V (cputyp == CPU_SUN4V) 240 #else 241 #define CPU_ISSUN4U (1) 242 #define CPU_ISSUN4US (0) 243 #define CPU_ISSUN4V (0) 244 #endif 245 246 #endif /* _LOCORE */ 247 #endif /* _KERNEL */ 248 249 /* 250 * Values for the cputyp variable. 251 */ 252 #define CPU_SUN4 0 253 #define CPU_SUN4C 1 254 #define CPU_SUN4M 2 255 #define CPU_SUN4U 3 256 #define CPU_SUN4US 4 257 #define CPU_SUN4V 5 258 259 /* 260 * Shorthand CPU-type macros. Enumerate all eight cases. 261 * Let compiler optimize away code conditional on constants. 262 * 263 * On a sun4 machine, the page size is 8192, while on a sun4c and sun4m 264 * it is 4096. Therefore, in the (SUN4 && (SUN4C || SUN4M)) cases below, 265 * NBPG, PGOFSET and PGSHIFT are defined as variables which are initialized 266 * early in locore.s after the machine type has been detected. 267 * 268 * Note that whenever the macros defined below evaluate to expressions 269 * involving variables, the kernel will perform slightly worse due to the 270 * extra memory references they'll generate. 271 */ 272 273 #define CPU_ISSUN4M (0) 274 #define CPU_ISSUN4C (0) 275 #define CPU_ISSUN4 (0) 276 277 278 #define PGSHIFT 13 /* log2(NBPG) */ 279 #define NBPG (1<<PGSHIFT) /* bytes/page */ 280 #define PGOFSET (NBPG-1) /* byte offset into page */ 281 282 #define PCI_MAGIC_IO_RANGE 0x100000000LL 283 284 #ifdef __arch64__ 285 #define STACK_ALIGNBYTES ALIGNBYTES64 286 #else 287 #define STACK_ALIGNBYTES ALIGNBYTES32 288 #endif 289