/*- * Copyright (c) 1990 The Regents of the University of California. * Copyright (c) 2008 The DragonFly Project. * All rights reserved. * * This code is derived from software contributed to Berkeley by * William Jolitz. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * from: @(#)param.h 5.8 (Berkeley) 6/28/91 * $FreeBSD: src/sys/i386/include/param.h,v 1.54.2.8 2002/08/31 21:15:55 dillon Exp $ */ #ifndef _CPU_PARAM_H_ #define _CPU_PARAM_H_ /* * Machine dependent constants for x86_64. */ #ifndef _MACHINE #define _MACHINE x86_64 #endif #ifndef _MACHINE_ARCH #define _MACHINE_ARCH x86_64 #endif #ifndef MACHINE #define MACHINE "x86_64" #endif #ifndef MACHINE_ARCH #define MACHINE_ARCH "x86_64" #endif /* * Use SMP_MAXCPU instead of MAXCPU for structures that are intended to * remain compatible between UP and SMP builds. * * WARNING! CPUMASK macros in include/cpumask.h must also be adjusted, * as well as any assembly. Be sure that _CPUMASK_ELEMENTS * is always correct so incompatible assembly #error's out * during the kernel compile. * * WARNING! To raise SMP_MAXCPU further we probably need to reserve * more KVM space via MPPTDI (platform/pc64/include/pmap.h), * depends on SMP_MAXCPU * sizeof(struct privatedata). */ #define SMP_MAXCPU 256 #define MAXCPU SMP_MAXCPU /* Constants derived from sizeof() that need recalculation. */ /* level 1 == page table */ #define NPTEPGSHIFT 9 /* LOG2(NPTEPG) */ #define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ #define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ #define PAGE_MASK (PAGE_SIZE-1) #define NPTEPG (PAGE_SIZE/8LU) /* PAGE_SIZE/sizeof(pt_entry_t) */ /* level 2 == page directory */ #define NPDEPGSHIFT 9 /* LOG2(NPDEPG) */ #define PDRSHIFT 21 /* LOG2(NBPDR) */ #define NBPDR (1<<PDRSHIFT) /* bytes/page dir */ #define PDRMASK (NBPDR-1) #define NPDEPG (PAGE_SIZE/8LU) /* PAGE_SIZE/sizeof(pd_entry_t) */ /* level 3 == page directory pointer table */ #define NPDPEPGSHIFT 9 /* LOG2(NPDPEPG) */ #define PDPSHIFT 30 /* LOG2(NBPDP) */ #define NBPDP (1<<PDPSHIFT) /* bytes/page dir ptr table */ #define PDPMASK (NBPDP-1) #define NPDPEPG (PAGE_SIZE/8LU) /* PAGE_SIZE/sizeof(pdp_entry_t) */ /* level 4 */ #define NPML4EPGSHIFT 9 /* LOG2(NPML4EPG) */ #define PML4SHIFT 39 /* LOG2(NBPML4) */ #define NBPML4 (1UL<<PML4SHIFT)/* bytes/page map level4 table */ #define PML4MASK (NBPML4-1) #define NPML4EPG (PAGE_SIZE/8LU) /* PAGE_SIZE/sizeof(pml4_entry_t) */ /* * Virtual address sign-extension and mask. If bit 47 is set then * set all higher bits. */ #define PML4_SIGNMASK 0xFFFF800000000000LU /* for vkernel */ #define SEG_SHIFT 21 #define SEG_SIZE (1<<SEG_SHIFT) /* bytes per mmu segment (level 1) */ #define SEG_MASK (SEG_SIZE-1) #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ #define DEV_BSIZE (1<<DEV_BSHIFT) #define DEV_BMASK (DEV_BSIZE - 1) #ifndef BLKDEV_IOSIZE #define BLKDEV_IOSIZE PAGE_SIZE /* default block device I/O size */ #endif #define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */ #define MAXPHYS (128 * 1024) /* max raw I/O transfer size */ #define MAXDUMPPGS (MAXPHYS/PAGE_SIZE) #define IOPAGES 2 /* pages of i/o permission bitmap */ #define UPAGES 4 /* pages of u-area */ /* * Ceiling on amount of swblock kva space, can be changed via * kern.maxswzone /boot/loader.conf variable. On 64 bit machines * the kernel has a 512G address space, and we do not want to allow * more than half of that to be used for this purpose. * * Approximately (size / 192 x 16 x PAGE_SIZE) bytes of swap. This * comes to approximately 1GB of swap space per 1MB of kernel memory. * Actually using 512G of swap will tie up a big chunk (512M) of physical * memory. */ #ifndef VM_SWZONE_SIZE_MAX #define VM_SWZONE_SIZE_MAX (256L * 1024L * 1024 * 1024) #endif /* * Ceiling on size of buffer cache (really only effects write queueing, * the VM page cache is not effected), can be changed via * kern.maxbcache /boot/loader.conf variable. * * This value is unbounded on 64-bit boxes, boot code will limit the * buffer cache size to a portion of available physical memory. */ #ifndef VM_BCACHE_SIZE_MAX #define VM_BCACHE_SIZE_MAX 0 #endif /* * Some macros for units conversion */ /* clicks to bytes */ #define ctob(x) ((x)<<PAGE_SHIFT) /* bytes to clicks */ #define btoc(x) (((unsigned)(x)+PAGE_MASK)>>PAGE_SHIFT) /* * btodb() is messy and perhaps slow because `bytes' may be an off_t. We * want to shift an unsigned type to avoid sign extension and we don't * want to widen `bytes' unnecessarily. Assume that the result fits in * a daddr_t. */ #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ (sizeof (bytes) > sizeof(long) \ ? (daddr_t)((unsigned long long)(bytes) >> DEV_BSHIFT) \ : (daddr_t)((unsigned long)(bytes) >> DEV_BSHIFT)) #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ ((off_t)(db) << DEV_BSHIFT) /* * Mach derived conversion macros */ #define round_page(x) ((((unsigned long)(x)) + PAGE_MASK) & ~(unsigned long)(PAGE_MASK)) #define trunc_page(x) ((unsigned long)(x) & ~(unsigned long)(PAGE_MASK)) #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) #define atop(x) ((vm_pindex_t)((x) >> PAGE_SHIFT)) #define ptoa(x) ((vm_paddr_t)(x) << PAGE_SHIFT) #define x86_64_btop(x) ((vm_pindex_t)((x) >> PAGE_SHIFT)) #define x86_64_ptob(x) ((vm_paddr_t)(x) << PAGE_SHIFT) #define pgtok(x) ((x) * (PAGE_SIZE / 1024)) #endif /* _KERNEL || _KERNEL_STRUCTURES */ #ifdef _KERNEL /* * We put here the definition of two debugging macros/function which * are very convenient to have available. * The macro is called TSTMP() and is used to timestamp events in the * kernel using the TSC register, and export them to userland through * the sysctl variable debug.timestamp, which is a circular buffer * holding pairs of u_int32_t variables <timestamp, argument> . * They can be retrieved with something like * * sysctl -b debug.timestamp | hexdump -e '"%15u %15u\n"' * * The function _TSTMP() is defined in i386/isa/clock.c. It does not * try to grab any locks or block interrupts or identify which CPU it * is running on. You are supposed to know what to do if you use it. * * The macros must be enabled with "options KERN_TIMESTAMP" in the kernel * config file, otherwise they default to an empty block. */ #ifdef KERN_TIMESTAMP void _TSTMP(u_int32_t); #define TSTMP(class, unit, event, par) _TSTMP( \ (((class) & 0x0f) << 28 ) | \ (((unit) & 0x0f) << 24 ) | \ (((event) & 0xff) << 16 ) | \ (((par) & 0xffff) ) ) #else /* !KERN_TIMESTAMP */ #define _TSTMP(x) {} #define TSTMP(class, unit, event, par) _TSTMP(0) #endif /* !KERN_TIMESTAMP */ #endif /* _KERNEL */ #endif /* !_CPU_PARAM_H_ */
