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. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: @(#)param.h 5.8 (Berkeley) 6/28/91 38 * $FreeBSD: src/sys/i386/include/param.h,v 1.54.2.8 2002/08/31 21:15:55 dillon Exp $ 39 */ 40 41 #ifndef _CPU_PARAM_H_ 42 43 /* 44 * Do not prevent re-includes of <machine/param.h> if the file was included 45 * with NO_NAMESPACE_POLLUTION, or expected macros will not exist. 46 */ 47 #ifndef _NO_NAMESPACE_POLLUTION 48 #define _CPU_PARAM_H_ 49 #endif 50 51 /* 52 * Machine dependent constants for x86_64. 53 */ 54 #ifndef _CPU_PARAM_H1_ 55 #define _CPU_PARAM_H1_ 56 57 /* 58 * Round p (pointer or byte index) up to a correctly-aligned value 59 * for all data types (int, long, ...). The result is unsigned int 60 * and must be cast to any desired pointer type. 61 */ 62 #ifndef _ALIGNBYTES 63 #define _ALIGNBYTES (sizeof(long) - 1) 64 #endif 65 #ifndef _ALIGN 66 #define _ALIGN(p) (((unsigned long)(p) + _ALIGNBYTES) & ~_ALIGNBYTES) 67 #endif 68 69 #ifndef _MACHINE 70 #define _MACHINE x86_64 71 #endif 72 #ifndef _MACHINE_ARCH 73 #define _MACHINE_ARCH x86_64 74 #endif 75 76 #endif /* _CPU_PARAM_H1_ */ 77 78 #ifndef _NO_NAMESPACE_POLLUTION 79 80 #ifndef MACHINE 81 #define MACHINE "x86_64" 82 #endif 83 #ifndef MACHINE_ARCH 84 #define MACHINE_ARCH "x86_64" 85 #endif 86 87 /* 88 * Use SMP_MAXCPU instead of MAXCPU for structures that are intended to 89 * remain compatible between UP and SMP builds. 90 * 91 * WARNING! CPUMASK macros in include/types.h must also be adjusted, 92 * as well as any assembly. Be sure that CPUMASK_ELEMENTS 93 * is always correct so incompatible assembly #error's out 94 * during the kernel compile. 95 * 96 * WARNING! To raise SMP_MAXCPU further we probably need to reserve 97 * more KVM space via MPPTDI (platform/pc64/include/pmap.h), 98 * depends on SMP_MAXCPU * sizeof(struct privatedata). 99 */ 100 #define SMP_MAXCPU 256 101 #define MAXCPU SMP_MAXCPU 102 103 #define ALIGNBYTES _ALIGNBYTES 104 #define ALIGN(p) _ALIGN(p) 105 106 /* JG license? from fbsd/src/sys/amd64/include/param.h */ 107 /* level 1 == page table */ 108 #define NPTEPGSHIFT 9 /* LOG2(NPTEPG) */ 109 #define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 110 #define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 111 #define PAGE_MASK (PAGE_SIZE-1) 112 #define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 113 114 /* level 2 == page directory */ 115 #define NPDEPGSHIFT 9 /* LOG2(NPDEPG) */ 116 #define PDRSHIFT 21 /* LOG2(NBPDR) */ 117 #define NBPDR (1<<PDRSHIFT) /* bytes/page dir */ 118 #define PDRMASK (NBPDR-1) 119 #define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t))) 120 121 /* level 3 == page directory pointer table */ 122 #define NPDPEPGSHIFT 9 /* LOG2(NPDPEPG) */ 123 #define PDPSHIFT 30 /* LOG2(NBPDP) */ 124 #define NBPDP (1<<PDPSHIFT) /* bytes/page dir ptr table */ 125 #define PDPMASK (NBPDP-1) 126 #define NPDPEPG (PAGE_SIZE/(sizeof (pdp_entry_t))) 127 128 /* level 4 */ 129 #define NPML4EPGSHIFT 9 /* LOG2(NPML4EPG) */ 130 #define PML4SHIFT 39 /* LOG2(NPML4) */ 131 #define NPML4 (1UL<<PML4SHIFT)/* bytes/page map level4 table */ 132 #define NBPML4 (1ul<<PML4SHIFT)/* bytes/page map lev4 table */ 133 #define PML4MASK (NPML4-1) 134 #define NPML4EPG (PAGE_SIZE/(sizeof (pml4_entry_t))) 135 136 /* 137 * Virtual address sign-extension and mask. If bit 47 is set then 138 * set all higher bits. 139 */ 140 #define PML4_SIGNMASK 0xFFFF800000000000LU 141 142 /* for vkernel */ 143 #define SEG_SHIFT 21 144 #define SEG_SIZE (1<<SEG_SHIFT) /* bytes per mmu segment (level 1) */ 145 #define SEG_MASK (SEG_SIZE-1) 146 147 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 148 #define DEV_BSIZE (1<<DEV_BSHIFT) 149 #define DEV_BMASK (DEV_BSIZE - 1) 150 151 #ifndef BLKDEV_IOSIZE 152 #define BLKDEV_IOSIZE PAGE_SIZE /* default block device I/O size */ 153 #endif 154 #define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */ 155 #define MAXPHYS (128 * 1024) /* max raw I/O transfer size */ 156 #define MAXDUMPPGS (MAXPHYS/PAGE_SIZE) 157 158 #define IOPAGES 2 /* pages of i/o permission bitmap */ 159 #define UPAGES 4 /* pages of u-area */ 160 161 /* 162 * Ceiling on amount of swblock kva space, can be changed via 163 * kern.maxswzone /boot/loader.conf variable. On 64 bit machines 164 * the kernel has a 512G address space so reserving 512M of KVM 165 * is not a big deal. 166 * 167 * Approximately (size / 160 x 32 x PAGE_SIZE) bytes of swap. This 168 * comes to approximately 1GB of swap space per 1MB of kernel memory. 169 * Actually using 512G of swap will tie up a big chunk (512M) of physical 170 * memory. 171 */ 172 #ifndef VM_SWZONE_SIZE_MAX 173 #define VM_SWZONE_SIZE_MAX (512L * 1024 * 1024) 174 #endif 175 176 /* 177 * Ceiling on size of buffer cache (really only effects write queueing, 178 * the VM page cache is not effected), can be changed via 179 * kern.maxbcache /boot/loader.conf variable. 180 * 181 * This value is unbounded on 64-bit boxes, boot code will limit the 182 * buffer cache size to a portion of available physical memory. 183 */ 184 #ifndef VM_BCACHE_SIZE_MAX 185 #define VM_BCACHE_SIZE_MAX 0 186 #endif 187 188 /* 189 * Some macros for units conversion 190 */ 191 192 /* clicks to bytes */ 193 #define ctob(x) ((x)<<PAGE_SHIFT) 194 195 /* bytes to clicks */ 196 #define btoc(x) (((unsigned)(x)+PAGE_MASK)>>PAGE_SHIFT) 197 198 /* 199 * btodb() is messy and perhaps slow because `bytes' may be an off_t. We 200 * want to shift an unsigned type to avoid sign extension and we don't 201 * want to widen `bytes' unnecessarily. Assume that the result fits in 202 * a daddr_t. 203 */ 204 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 205 (sizeof (bytes) > sizeof(long) \ 206 ? (daddr_t)((unsigned long long)(bytes) >> DEV_BSHIFT) \ 207 : (daddr_t)((unsigned long)(bytes) >> DEV_BSHIFT)) 208 209 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 210 ((off_t)(db) << DEV_BSHIFT) 211 212 /* 213 * Mach derived conversion macros 214 */ 215 #define round_page(x) ((((unsigned long)(x)) + PAGE_MASK) & ~(unsigned long)(PAGE_MASK)) 216 #define trunc_page(x) ((unsigned long)(x) & ~(unsigned long)(PAGE_MASK)) 217 #define trunc_2mpage(x) ((unsigned long)(x) & ~(unsigned long)PDRMASK) 218 #define round_2mpage(x) ((((unsigned long)(x)) + PDRMASK) & ~(unsigned long)PDRMASK) 219 220 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 221 #define atop(x) ((vm_pindex_t)((x) >> PAGE_SHIFT)) 222 #endif 223 #define ptoa(x) ((vm_paddr_t)(x) << PAGE_SHIFT) 224 225 #define x86_64_btop(x) ((vm_pindex_t)((x) >> PAGE_SHIFT)) 226 #define x86_64_ptob(x) ((vm_paddr_t)(x) << PAGE_SHIFT) 227 228 #define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 229 230 #ifdef _KERNEL 231 232 /* 233 * We put here the definition of two debugging macros/function which 234 * are very convenient to have available. 235 * The macro is called TSTMP() and is used to timestamp events in the 236 * kernel using the TSC register, and export them to userland through 237 * the sysctl variable debug.timestamp, which is a circular buffer 238 * holding pairs of u_int32_t variables <timestamp, argument> . 239 * They can be retrieved with something like 240 * 241 * sysctl -b debug.timestamp | hexdump -e '"%15u %15u\n"' 242 * 243 * The function _TSTMP() is defined in i386/isa/clock.c. It does not 244 * try to grab any locks or block interrupts or identify which CPU it 245 * is running on. You are supposed to know what to do if you use it. 246 * 247 * The macros must be enabled with "options KERN_TIMESTAMP" in the kernel 248 * config file, otherwise they default to an empty block. 249 */ 250 251 #ifdef KERN_TIMESTAMP 252 extern void _TSTMP(u_int32_t argument); 253 #define TSTMP(class, unit, event, par) _TSTMP( \ 254 (((class) & 0x0f) << 28 ) | \ 255 (((unit) & 0x0f) << 24 ) | \ 256 (((event) & 0xff) << 16 ) | \ 257 (((par) & 0xffff) ) ) 258 259 #else /* !KERN_TIMESTAMP */ 260 #define _TSTMP(x) {} 261 #define TSTMP(class, unit, event, par) _TSTMP(0) 262 #endif /* !KERN_TIMESTAMP */ 263 #endif /* _KERNEL */ 264 265 #endif /* !_NO_NAMESPACE_POLLUTION */ 266 #endif /* !_CPU_PARAM_H_ */ 267