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 39 /* 40 * Do not prevent re-includes of <machine/param.h> if the file was included 41 * with NO_NAMESPACE_POLLUTION, or expected macros will not exist. 42 */ 43 #ifndef _NO_NAMESPACE_POLLUTION 44 #define _CPU_PARAM_H_ 45 #endif 46 47 /* 48 * Machine dependent constants for x86_64. 49 */ 50 #ifndef _CPU_PARAM_H1_ 51 #define _CPU_PARAM_H1_ 52 53 /* 54 * Round p (pointer or byte index) up to a correctly-aligned value 55 * for all data types (int, long, ...). The result is unsigned int 56 * and must be cast to any desired pointer type. 57 */ 58 #ifndef _ALIGNBYTES 59 #define _ALIGNBYTES (sizeof(long) - 1) 60 #endif 61 #ifndef _ALIGN 62 #define _ALIGN(p) (((unsigned long)(p) + _ALIGNBYTES) & ~_ALIGNBYTES) 63 #endif 64 65 #ifndef _MACHINE 66 #define _MACHINE x86_64 67 #endif 68 #ifndef _MACHINE_ARCH 69 #define _MACHINE_ARCH x86_64 70 #endif 71 72 #endif /* _CPU_PARAM_H1_ */ 73 74 #ifndef _NO_NAMESPACE_POLLUTION 75 76 #ifndef MACHINE 77 #define MACHINE "x86_64" 78 #endif 79 #ifndef MACHINE_ARCH 80 #define MACHINE_ARCH "x86_64" 81 #endif 82 83 /* 84 * Use SMP_MAXCPU instead of MAXCPU for structures that are intended to 85 * remain compatible between UP and SMP builds. 86 * 87 * WARNING! CPUMASK macros in include/types.h must also be adjusted, 88 * as well as any assembly. Be sure that CPUMASK_ELEMENTS 89 * is always correct so incompatible assembly #error's out 90 * during the kernel compile. 91 * 92 * WARNING! To raise SMP_MAXCPU further we probably need to reserve 93 * more KVM space via MPPTDI (platform/pc64/include/pmap.h), 94 * depends on SMP_MAXCPU * sizeof(struct privatedata). 95 */ 96 #define SMP_MAXCPU 256 97 #define MAXCPU SMP_MAXCPU 98 99 #define ALIGNBYTES _ALIGNBYTES 100 #define ALIGN(p) _ALIGN(p) 101 102 /* JG license? from fbsd/src/sys/amd64/include/param.h */ 103 /* level 1 == page table */ 104 #define NPTEPGSHIFT 9 /* LOG2(NPTEPG) */ 105 #define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 106 #define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 107 #define PAGE_MASK (PAGE_SIZE-1) 108 #define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 109 110 /* level 2 == page directory */ 111 #define NPDEPGSHIFT 9 /* LOG2(NPDEPG) */ 112 #define PDRSHIFT 21 /* LOG2(NBPDR) */ 113 #define NBPDR (1<<PDRSHIFT) /* bytes/page dir */ 114 #define PDRMASK (NBPDR-1) 115 #define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t))) 116 117 /* level 3 == page directory pointer table */ 118 #define NPDPEPGSHIFT 9 /* LOG2(NPDPEPG) */ 119 #define PDPSHIFT 30 /* LOG2(NBPDP) */ 120 #define NBPDP (1<<PDPSHIFT) /* bytes/page dir ptr table */ 121 #define PDPMASK (NBPDP-1) 122 #define NPDPEPG (PAGE_SIZE/(sizeof (pdp_entry_t))) 123 124 /* level 4 */ 125 #define NPML4EPGSHIFT 9 /* LOG2(NPML4EPG) */ 126 #define PML4SHIFT 39 /* LOG2(NPML4) */ 127 #define NPML4 (1UL<<PML4SHIFT)/* bytes/page map level4 table */ 128 #define NBPML4 (1ul<<PML4SHIFT)/* bytes/page map lev4 table */ 129 #define PML4MASK (NPML4-1) 130 #define NPML4EPG (PAGE_SIZE/(sizeof (pml4_entry_t))) 131 132 /* 133 * Virtual address sign-extension and mask. If bit 47 is set then 134 * set all higher bits. 135 */ 136 #define PML4_SIGNMASK 0xFFFF800000000000LU 137 138 /* for vkernel */ 139 #define SEG_SHIFT 21 140 #define SEG_SIZE (1<<SEG_SHIFT) /* bytes per mmu segment (level 1) */ 141 #define SEG_MASK (SEG_SIZE-1) 142 143 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 144 #define DEV_BSIZE (1<<DEV_BSHIFT) 145 #define DEV_BMASK (DEV_BSIZE - 1) 146 147 #ifndef BLKDEV_IOSIZE 148 #define BLKDEV_IOSIZE PAGE_SIZE /* default block device I/O size */ 149 #endif 150 #define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */ 151 #define MAXPHYS (128 * 1024) /* max raw I/O transfer size */ 152 #define MAXDUMPPGS (MAXPHYS/PAGE_SIZE) 153 154 #define IOPAGES 2 /* pages of i/o permission bitmap */ 155 #define UPAGES 4 /* pages of u-area */ 156 157 /* 158 * Ceiling on amount of swblock kva space, can be changed via 159 * kern.maxswzone /boot/loader.conf variable. On 64 bit machines 160 * the kernel has a 512G address space so reserving 512M of KVM 161 * is not a big deal. 162 * 163 * Approximately (size / 160 x 32 x PAGE_SIZE) bytes of swap. This 164 * comes to approximately 1GB of swap space per 1MB of kernel memory. 165 * Actually using 512G of swap will tie up a big chunk (512M) of physical 166 * memory. 167 */ 168 #ifndef VM_SWZONE_SIZE_MAX 169 #define VM_SWZONE_SIZE_MAX (512L * 1024 * 1024) 170 #endif 171 172 /* 173 * Ceiling on size of buffer cache (really only effects write queueing, 174 * the VM page cache is not effected), can be changed via 175 * kern.maxbcache /boot/loader.conf variable. 176 * 177 * This value is unbounded on 64-bit boxes, boot code will limit the 178 * buffer cache size to a portion of available physical memory. 179 */ 180 #ifndef VM_BCACHE_SIZE_MAX 181 #define VM_BCACHE_SIZE_MAX 0 182 #endif 183 184 /* 185 * Some macros for units conversion 186 */ 187 188 /* clicks to bytes */ 189 #define ctob(x) ((x)<<PAGE_SHIFT) 190 191 /* bytes to clicks */ 192 #define btoc(x) (((unsigned)(x)+PAGE_MASK)>>PAGE_SHIFT) 193 194 /* 195 * btodb() is messy and perhaps slow because `bytes' may be an off_t. We 196 * want to shift an unsigned type to avoid sign extension and we don't 197 * want to widen `bytes' unnecessarily. Assume that the result fits in 198 * a daddr_t. 199 */ 200 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 201 (sizeof (bytes) > sizeof(long) \ 202 ? (daddr_t)((unsigned long long)(bytes) >> DEV_BSHIFT) \ 203 : (daddr_t)((unsigned long)(bytes) >> DEV_BSHIFT)) 204 205 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 206 ((off_t)(db) << DEV_BSHIFT) 207 208 /* 209 * Mach derived conversion macros 210 */ 211 #define round_page(x) ((((unsigned long)(x)) + PAGE_MASK) & ~(unsigned long)(PAGE_MASK)) 212 #define trunc_page(x) ((unsigned long)(x) & ~(unsigned long)(PAGE_MASK)) 213 #define trunc_2mpage(x) ((unsigned long)(x) & ~(unsigned long)PDRMASK) 214 #define round_2mpage(x) ((((unsigned long)(x)) + PDRMASK) & ~(unsigned long)PDRMASK) 215 216 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 217 #define atop(x) ((vm_pindex_t)((x) >> PAGE_SHIFT)) 218 #endif 219 #define ptoa(x) ((vm_paddr_t)(x) << PAGE_SHIFT) 220 221 #define x86_64_btop(x) ((vm_pindex_t)((x) >> PAGE_SHIFT)) 222 #define x86_64_ptob(x) ((vm_paddr_t)(x) << PAGE_SHIFT) 223 224 #define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 225 226 #ifdef _KERNEL 227 228 /* 229 * We put here the definition of two debugging macros/function which 230 * are very convenient to have available. 231 * The macro is called TSTMP() and is used to timestamp events in the 232 * kernel using the TSC register, and export them to userland through 233 * the sysctl variable debug.timestamp, which is a circular buffer 234 * holding pairs of u_int32_t variables <timestamp, argument> . 235 * They can be retrieved with something like 236 * 237 * sysctl -b debug.timestamp | hexdump -e '"%15u %15u\n"' 238 * 239 * The function _TSTMP() is defined in i386/isa/clock.c. It does not 240 * try to grab any locks or block interrupts or identify which CPU it 241 * is running on. You are supposed to know what to do if you use it. 242 * 243 * The macros must be enabled with "options KERN_TIMESTAMP" in the kernel 244 * config file, otherwise they default to an empty block. 245 */ 246 247 #ifdef KERN_TIMESTAMP 248 extern void _TSTMP(u_int32_t argument); 249 #define TSTMP(class, unit, event, par) _TSTMP( \ 250 (((class) & 0x0f) << 28 ) | \ 251 (((unit) & 0x0f) << 24 ) | \ 252 (((event) & 0xff) << 16 ) | \ 253 (((par) & 0xffff) ) ) 254 255 #else /* !KERN_TIMESTAMP */ 256 #define _TSTMP(x) {} 257 #define TSTMP(class, unit, event, par) _TSTMP(0) 258 #endif /* !KERN_TIMESTAMP */ 259 #endif /* _KERNEL */ 260 261 #endif /* !_NO_NAMESPACE_POLLUTION */ 262 #endif /* !_CPU_PARAM_H_ */ 263