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