1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * Copyright (c) 2008 The DragonFly Project. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * William Jolitz. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#)param.h 5.8 (Berkeley) 6/28/91 34 * $FreeBSD: src/sys/i386/include/param.h,v 1.54.2.8 2002/08/31 21:15:55 dillon Exp $ 35 */ 36 37 #ifndef _CPU_PARAM_H_ 38 #define _CPU_PARAM_H_ 39 40 /* 41 * Machine dependent constants for x86_64. 42 */ 43 44 #ifndef _MACHINE 45 #define _MACHINE x86_64 46 #endif 47 #ifndef _MACHINE_ARCH 48 #define _MACHINE_ARCH x86_64 49 #endif 50 51 #ifndef MACHINE 52 #define MACHINE "x86_64" 53 #endif 54 #ifndef MACHINE_ARCH 55 #define MACHINE_ARCH "x86_64" 56 #endif 57 58 /* 59 * Use SMP_MAXCPU instead of MAXCPU for structures that are intended to 60 * remain compatible between UP and SMP builds. 61 * 62 * WARNING! CPUMASK macros in include/cpumask.h must also be adjusted, 63 * as well as any assembly. Be sure that _CPUMASK_ELEMENTS 64 * is always correct so incompatible assembly #error's out 65 * during the kernel compile. 66 * 67 * WARNING! To raise SMP_MAXCPU further we probably need to reserve 68 * more KVM space via MPPTDI (platform/pc64/include/pmap.h), 69 * depends on SMP_MAXCPU * sizeof(struct privatedata). 70 */ 71 #define SMP_MAXCPU 256 72 #define MAXCPU SMP_MAXCPU 73 74 /* Constants derived from sizeof() that need recalculation. */ 75 /* level 1 == page table */ 76 #define NPTEPGSHIFT 9 /* LOG2(NPTEPG) */ 77 #define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 78 #define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 79 #define PAGE_MASK (PAGE_SIZE-1) 80 #define NPTEPG (PAGE_SIZE/8LU) /* PAGE_SIZE/sizeof(pt_entry_t) */ 81 82 /* level 2 == page directory */ 83 #define NPDEPGSHIFT 9 /* LOG2(NPDEPG) */ 84 #define PDRSHIFT 21 /* LOG2(NBPDR) */ 85 #define NBPDR (1<<PDRSHIFT) /* bytes/page dir */ 86 #define PDRMASK (NBPDR-1) 87 #define NPDEPG (PAGE_SIZE/8LU) /* PAGE_SIZE/sizeof(pd_entry_t) */ 88 89 /* level 3 == page directory pointer table */ 90 #define NPDPEPGSHIFT 9 /* LOG2(NPDPEPG) */ 91 #define PDPSHIFT 30 /* LOG2(NBPDP) */ 92 #define NBPDP (1<<PDPSHIFT) /* bytes/page dir ptr table */ 93 #define PDPMASK (NBPDP-1) 94 #define NPDPEPG (PAGE_SIZE/8LU) /* PAGE_SIZE/sizeof(pdp_entry_t) */ 95 96 /* level 4 */ 97 #define NPML4EPGSHIFT 9 /* LOG2(NPML4EPG) */ 98 #define PML4SHIFT 39 /* LOG2(NBPML4) */ 99 #define NBPML4 (1UL<<PML4SHIFT)/* bytes/page map level4 table */ 100 #define PML4MASK (NBPML4-1) 101 #define NPML4EPG (PAGE_SIZE/8LU) /* PAGE_SIZE/sizeof(pml4_entry_t) */ 102 103 /* 104 * Virtual address sign-extension and mask. If bit 47 is set then 105 * set all higher bits. 106 */ 107 #define PML4_SIGNMASK 0xFFFF800000000000LU 108 109 /* for vkernel */ 110 #define SEG_SHIFT 21 111 #define SEG_SIZE (1<<SEG_SHIFT) /* bytes per mmu segment (level 1) */ 112 #define SEG_MASK (SEG_SIZE-1) 113 114 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 115 #define DEV_BSIZE (1<<DEV_BSHIFT) 116 #define DEV_BMASK (DEV_BSIZE - 1) 117 118 #ifndef BLKDEV_IOSIZE 119 #define BLKDEV_IOSIZE PAGE_SIZE /* default block device I/O size */ 120 #endif 121 #define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */ 122 #define MAXPHYS (128 * 1024) /* max raw I/O transfer size */ 123 #define MAXDUMPPGS (MAXPHYS/PAGE_SIZE) 124 125 #define IOPAGES 2 /* pages of i/o permission bitmap */ 126 #define UPAGES 4 /* pages of u-area */ 127 128 /* 129 * Ceiling on amount of swblock kva space, can be changed via 130 * kern.maxswzone /boot/loader.conf variable. On 64 bit machines 131 * the kernel has a 512G address space, and we do not want to allow 132 * more than half of that to be used for this purpose. 133 * 134 * Approximately (size / 192 x 16 x PAGE_SIZE) bytes of swap. This 135 * comes to approximately 1GB of swap space per 1MB of kernel memory. 136 * Actually using 512G of swap will tie up a big chunk (512M) of physical 137 * memory. 138 */ 139 #ifndef VM_SWZONE_SIZE_MAX 140 #define VM_SWZONE_SIZE_MAX (256L * 1024L * 1024 * 1024) 141 #endif 142 143 /* 144 * Ceiling on size of buffer cache (really only effects write queueing, 145 * the VM page cache is not effected), can be changed via 146 * kern.maxbcache /boot/loader.conf variable. 147 * 148 * This value is unbounded on 64-bit boxes, boot code will limit the 149 * buffer cache size to a portion of available physical memory. 150 */ 151 #ifndef VM_BCACHE_SIZE_MAX 152 #define VM_BCACHE_SIZE_MAX 0 153 #endif 154 155 /* 156 * Some macros for units conversion 157 */ 158 159 /* clicks to bytes */ 160 #define ctob(x) ((x)<<PAGE_SHIFT) 161 162 /* bytes to clicks */ 163 #define btoc(x) (((unsigned)(x)+PAGE_MASK)>>PAGE_SHIFT) 164 165 /* 166 * btodb() is messy and perhaps slow because `bytes' may be an off_t. We 167 * want to shift an unsigned type to avoid sign extension and we don't 168 * want to widen `bytes' unnecessarily. Assume that the result fits in 169 * a daddr_t. 170 */ 171 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 172 (sizeof (bytes) > sizeof(long) \ 173 ? (daddr_t)((unsigned long long)(bytes) >> DEV_BSHIFT) \ 174 : (daddr_t)((unsigned long)(bytes) >> DEV_BSHIFT)) 175 176 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 177 ((off_t)(db) << DEV_BSHIFT) 178 179 /* 180 * Mach derived conversion macros 181 */ 182 #define round_page(x) ((((unsigned long)(x)) + PAGE_MASK) & ~(unsigned long)(PAGE_MASK)) 183 #define trunc_page(x) ((unsigned long)(x) & ~(unsigned long)(PAGE_MASK)) 184 185 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 186 #define atop(x) ((vm_pindex_t)((x) >> PAGE_SHIFT)) 187 #define ptoa(x) ((vm_paddr_t)(x) << PAGE_SHIFT) 188 189 #define x86_64_btop(x) ((vm_pindex_t)((x) >> PAGE_SHIFT)) 190 #define x86_64_ptob(x) ((vm_paddr_t)(x) << PAGE_SHIFT) 191 192 #define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 193 #endif /* _KERNEL || _KERNEL_STRUCTURES */ 194 195 #ifdef _KERNEL 196 197 /* 198 * We put here the definition of two debugging macros/function which 199 * are very convenient to have available. 200 * The macro is called TSTMP() and is used to timestamp events in the 201 * kernel using the TSC register, and export them to userland through 202 * the sysctl variable debug.timestamp, which is a circular buffer 203 * holding pairs of u_int32_t variables <timestamp, argument> . 204 * They can be retrieved with something like 205 * 206 * sysctl -b debug.timestamp | hexdump -e '"%15u %15u\n"' 207 * 208 * The function _TSTMP() is defined in i386/isa/clock.c. It does not 209 * try to grab any locks or block interrupts or identify which CPU it 210 * is running on. You are supposed to know what to do if you use it. 211 * 212 * The macros must be enabled with "options KERN_TIMESTAMP" in the kernel 213 * config file, otherwise they default to an empty block. 214 */ 215 216 #ifdef KERN_TIMESTAMP 217 void _TSTMP(u_int32_t); 218 #define TSTMP(class, unit, event, par) _TSTMP( \ 219 (((class) & 0x0f) << 28 ) | \ 220 (((unit) & 0x0f) << 24 ) | \ 221 (((event) & 0xff) << 16 ) | \ 222 (((par) & 0xffff) ) ) 223 224 #else /* !KERN_TIMESTAMP */ 225 #define _TSTMP(x) {} 226 #define TSTMP(class, unit, event, par) _TSTMP(0) 227 #endif /* !KERN_TIMESTAMP */ 228 #endif /* _KERNEL */ 229 230 #endif /* !_CPU_PARAM_H_ */ 231