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 /* 45 * Round p (pointer or byte index) up to a correctly-aligned value 46 * for all data types (int, long, ...). The result is unsigned int 47 * and must be cast to any desired pointer type. 48 */ 49 #ifndef _ALIGNBYTES 50 #define _ALIGNBYTES (sizeof(long) - 1) 51 #endif 52 #ifndef _ALIGN 53 #define _ALIGN(p) (((unsigned long)(p) + _ALIGNBYTES) & ~_ALIGNBYTES) 54 #endif 55 56 #ifndef _MACHINE 57 #define _MACHINE x86_64 58 #endif 59 #ifndef _MACHINE_ARCH 60 #define _MACHINE_ARCH x86_64 61 #endif 62 63 #ifndef MACHINE 64 #define MACHINE "x86_64" 65 #endif 66 #ifndef MACHINE_ARCH 67 #define MACHINE_ARCH "x86_64" 68 #endif 69 70 /* 71 * Use SMP_MAXCPU instead of MAXCPU for structures that are intended to 72 * remain compatible between UP and SMP builds. 73 * 74 * WARNING! CPUMASK macros in include/cpumask.h must also be adjusted, 75 * as well as any assembly. Be sure that _CPUMASK_ELEMENTS 76 * is always correct so incompatible assembly #error's out 77 * during the kernel compile. 78 * 79 * WARNING! To raise SMP_MAXCPU further we probably need to reserve 80 * more KVM space via MPPTDI (platform/pc64/include/pmap.h), 81 * depends on SMP_MAXCPU * sizeof(struct privatedata). 82 */ 83 #define SMP_MAXCPU 256 84 #define MAXCPU SMP_MAXCPU 85 86 #define ALIGNBYTES _ALIGNBYTES 87 #define ALIGN(p) _ALIGN(p) 88 89 /* JG license? from fbsd/src/sys/amd64/include/param.h */ 90 /* level 1 == page table */ 91 #define NPTEPGSHIFT 9 /* LOG2(NPTEPG) */ 92 #define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 93 #define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 94 #define PAGE_MASK (PAGE_SIZE-1) 95 #define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 96 97 /* level 2 == page directory */ 98 #define NPDEPGSHIFT 9 /* LOG2(NPDEPG) */ 99 #define PDRSHIFT 21 /* LOG2(NBPDR) */ 100 #define NBPDR (1<<PDRSHIFT) /* bytes/page dir */ 101 #define PDRMASK (NBPDR-1) 102 #define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t))) 103 104 /* level 3 == page directory pointer table */ 105 #define NPDPEPGSHIFT 9 /* LOG2(NPDPEPG) */ 106 #define PDPSHIFT 30 /* LOG2(NBPDP) */ 107 #define NBPDP (1<<PDPSHIFT) /* bytes/page dir ptr table */ 108 #define PDPMASK (NBPDP-1) 109 #define NPDPEPG (PAGE_SIZE/(sizeof (pdp_entry_t))) 110 111 /* level 4 */ 112 #define NPML4EPGSHIFT 9 /* LOG2(NPML4EPG) */ 113 #define PML4SHIFT 39 /* LOG2(NPML4) */ 114 #define NPML4 (1UL<<PML4SHIFT)/* bytes/page map level4 table */ 115 #define NBPML4 (1ul<<PML4SHIFT)/* bytes/page map lev4 table */ 116 #define PML4MASK (NPML4-1) 117 #define NPML4EPG (PAGE_SIZE/(sizeof (pml4_entry_t))) 118 119 /* 120 * Virtual address sign-extension and mask. If bit 47 is set then 121 * set all higher bits. 122 */ 123 #define PML4_SIGNMASK 0xFFFF800000000000LU 124 125 /* for vkernel */ 126 #define SEG_SHIFT 21 127 #define SEG_SIZE (1<<SEG_SHIFT) /* bytes per mmu segment (level 1) */ 128 #define SEG_MASK (SEG_SIZE-1) 129 130 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 131 #define DEV_BSIZE (1<<DEV_BSHIFT) 132 #define DEV_BMASK (DEV_BSIZE - 1) 133 134 #ifndef BLKDEV_IOSIZE 135 #define BLKDEV_IOSIZE PAGE_SIZE /* default block device I/O size */ 136 #endif 137 #define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */ 138 #define MAXPHYS (128 * 1024) /* max raw I/O transfer size */ 139 #define MAXDUMPPGS (MAXPHYS/PAGE_SIZE) 140 141 #define IOPAGES 2 /* pages of i/o permission bitmap */ 142 #define UPAGES 4 /* pages of u-area */ 143 144 /* 145 * Ceiling on amount of swblock kva space, can be changed via 146 * kern.maxswzone /boot/loader.conf variable. On 64 bit machines 147 * the kernel has a 512G address space, and we do not want to allow 148 * more than half of that to be used for this purpose. 149 * 150 * Approximately (size / 192 x 16 x PAGE_SIZE) bytes of swap. This 151 * comes to approximately 1GB of swap space per 1MB of kernel memory. 152 * Actually using 512G of swap will tie up a big chunk (512M) of physical 153 * memory. 154 */ 155 #ifndef VM_SWZONE_SIZE_MAX 156 #define VM_SWZONE_SIZE_MAX (256L * 1024L * 1024 * 1024) 157 #endif 158 159 /* 160 * Ceiling on size of buffer cache (really only effects write queueing, 161 * the VM page cache is not effected), can be changed via 162 * kern.maxbcache /boot/loader.conf variable. 163 * 164 * This value is unbounded on 64-bit boxes, boot code will limit the 165 * buffer cache size to a portion of available physical memory. 166 */ 167 #ifndef VM_BCACHE_SIZE_MAX 168 #define VM_BCACHE_SIZE_MAX 0 169 #endif 170 171 /* 172 * Some macros for units conversion 173 */ 174 175 /* clicks to bytes */ 176 #define ctob(x) ((x)<<PAGE_SHIFT) 177 178 /* bytes to clicks */ 179 #define btoc(x) (((unsigned)(x)+PAGE_MASK)>>PAGE_SHIFT) 180 181 /* 182 * btodb() is messy and perhaps slow because `bytes' may be an off_t. We 183 * want to shift an unsigned type to avoid sign extension and we don't 184 * want to widen `bytes' unnecessarily. Assume that the result fits in 185 * a daddr_t. 186 */ 187 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 188 (sizeof (bytes) > sizeof(long) \ 189 ? (daddr_t)((unsigned long long)(bytes) >> DEV_BSHIFT) \ 190 : (daddr_t)((unsigned long)(bytes) >> DEV_BSHIFT)) 191 192 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 193 ((off_t)(db) << DEV_BSHIFT) 194 195 /* 196 * Mach derived conversion macros 197 */ 198 #define round_page(x) ((((unsigned long)(x)) + PAGE_MASK) & ~(unsigned long)(PAGE_MASK)) 199 #define trunc_page(x) ((unsigned long)(x) & ~(unsigned long)(PAGE_MASK)) 200 #define trunc_2mpage(x) ((unsigned long)(x) & ~(unsigned long)PDRMASK) 201 #define round_2mpage(x) ((((unsigned long)(x)) + PDRMASK) & ~(unsigned long)PDRMASK) 202 203 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 204 #define atop(x) ((vm_pindex_t)((x) >> PAGE_SHIFT)) 205 #endif 206 #define ptoa(x) ((vm_paddr_t)(x) << PAGE_SHIFT) 207 208 #define x86_64_btop(x) ((vm_pindex_t)((x) >> PAGE_SHIFT)) 209 #define x86_64_ptob(x) ((vm_paddr_t)(x) << PAGE_SHIFT) 210 211 #define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 212 213 #ifdef _KERNEL 214 215 /* 216 * We put here the definition of two debugging macros/function which 217 * are very convenient to have available. 218 * The macro is called TSTMP() and is used to timestamp events in the 219 * kernel using the TSC register, and export them to userland through 220 * the sysctl variable debug.timestamp, which is a circular buffer 221 * holding pairs of u_int32_t variables <timestamp, argument> . 222 * They can be retrieved with something like 223 * 224 * sysctl -b debug.timestamp | hexdump -e '"%15u %15u\n"' 225 * 226 * The function _TSTMP() is defined in i386/isa/clock.c. It does not 227 * try to grab any locks or block interrupts or identify which CPU it 228 * is running on. You are supposed to know what to do if you use it. 229 * 230 * The macros must be enabled with "options KERN_TIMESTAMP" in the kernel 231 * config file, otherwise they default to an empty block. 232 */ 233 234 #ifdef KERN_TIMESTAMP 235 extern void _TSTMP(u_int32_t argument); 236 #define TSTMP(class, unit, event, par) _TSTMP( \ 237 (((class) & 0x0f) << 28 ) | \ 238 (((unit) & 0x0f) << 24 ) | \ 239 (((event) & 0xff) << 16 ) | \ 240 (((par) & 0xffff) ) ) 241 242 #else /* !KERN_TIMESTAMP */ 243 #define _TSTMP(x) {} 244 #define TSTMP(class, unit, event, par) _TSTMP(0) 245 #endif /* !KERN_TIMESTAMP */ 246 #endif /* _KERNEL */ 247 248 #endif /* !_CPU_PARAM_H_ */ 249