/*- * Copyright (c) 1990 The Regents of the University of California. * Copyright (c) 1994 John S. Dyson * Copyright (c) 2003 Peter Wemm * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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: @(#)vmparam.h 5.9 (Berkeley) 5/12/91 * $FreeBSD: src/sys/amd64/include/vmparam.h,v 1.44 2003/12/07 04:51:04 alc Exp $ * $DragonFly: src/sys/platform/pc64/include/vmparam.h,v 1.2 2008/08/29 17:07:17 dillon Exp $ */ #ifndef _MACHINE_VMPARAM_H_ #define _MACHINE_VMPARAM_H_ /* * Machine dependent constants for x86_64. */ /* * Virtual memory related constants, all in bytes */ #define MAXTSIZ (32UL*1024*1024*1024) /* max text size */ #ifndef DFLDSIZ #define DFLDSIZ (128UL*1024*1024) /* initial data size limit */ #endif #ifndef MAXDSIZ #define MAXDSIZ (32UL*1024*1024*1024) /* max data size */ #endif #ifndef DFLSSIZ #define DFLSSIZ (8UL*1024*1024) /* initial stack size limit */ #endif #ifndef MAXSSIZ #define MAXSSIZ (512UL*1024*1024) /* max stack size */ #endif #ifndef MAXTHRSSIZ #define MAXTHRSSIZ (128UL*1024*1024*1024) /* thread stack area */ #endif #ifndef SGROWSIZ #define SGROWSIZ (128UL*1024) /* amount to grow stack */ #endif /* * The time for a process to be blocked before being very swappable. * This is a number of seconds which the system takes as being a non-trivial * amount of real time. You probably shouldn't change this; * it is used in subtle ways (fractions and multiples of it are, that is, like * half of a ``long time'', almost a long time, etc.) * It is related to human patience and other factors which don't really * change over time. */ #define MAXSLP 20 /* * We provide a machine specific single page allocator through the use * of the direct mapped segment. This uses 2MB pages for reduced * TLB pressure. */ #define UMA_MD_SMALL_ALLOC /* * The number of PHYSSEG entries must be one greater than the number * of phys_avail entries because the phys_avail entry that spans the * largest physical address that is accessible by ISA DMA is split * into two PHYSSEG entries. */ #define VM_PHYSSEG_MAX 127 /* * Virtual addresses of things. Derived from the page directory and * page table indexes from pmap.h for precision. * Because of the page that is both a PD and PT, it looks a little * messy at times, but hey, we'll do anything to save a page :-) * * NKPDPE is the number of PD's representing KVM. Not all are immediately * populated. There are 512 PD's per PDP and the value is calculated from * NKPML4E (see pmap.h). * * The ending address is non-inclusive of the per-cpu data array * which starts at MPPTDI (-16MB mark). MPPTDI is the page directory * index in the last PD of the kernel address space and is typically * set to (NPDEPG - 8) = (512 - 8). */ #define NKPDPE (NKPML4E*NPDPEPG-1) #define KPDPPHYS_KVA KVADDR(KPML4I, 0, 0, 0) #define VM_MIN_KERNEL_ADDRESS KVADDR(KPML4I, NKPML4E*NPDPEPG - NKPDPE, 0, 0) #define VM_MAX_KERNEL_ADDRESS KVADDR(KPML4I + NKPML4E - 1, \ NPDPEPG - 1, MPPTDI, NPTEPG - 1) #define DMAP_MIN_ADDRESS KVADDR(DMPML4I, 0, 0, 0) #define DMAP_MAX_ADDRESS KVADDR(DMPML4I+NDMPML4E, 0, 0, 0) #define KERNBASE KVADDR(KPML4I + NKPML4E - 1, KPDPI, 0, 0) #define PTOV_OFFSET KERNBASE #define UPT_MAX_ADDRESS KVADDR(PML4PML4I, PML4PML4I, PML4PML4I, PML4PML4I) #define UPT_MIN_ADDRESS KVADDR(PML4PML4I, 0, 0, 0) /* * Do not allow the top 2MB of the user stack to be mapped to work around * an AMD bug wherein the cpu can lockup or destabilize if the instruction * prefetcher crosses over into non-canonical address space. Only the top * 4KB needs to be disallowed, but taking out the whole 2MB allows potential * 2MB PTE optimizations to be retained. */ #define VM_MIN_USER_ADDRESS ((vm_offset_t)0) #define VM_MAX_USER_ADDRESS UVADDR(NUPDP_USER - 1, NPDPEPG - 1, \ NPDEPG - 1, 0) #define USRSTACK VM_MAX_USER_ADDRESS #define VM_MAX_ADDRESS UPT_MAX_ADDRESS #define VM_MIN_ADDRESS (0) #define PHYS_TO_DMAP(x) ((vm_offset_t)(x) + DMAP_MIN_ADDRESS) #define DMAP_TO_PHYS(x) ((vm_paddr_t)(x) - DMAP_MIN_ADDRESS) /* initial pagein size of beginning of executable file */ #ifndef VM_INITIAL_PAGEIN #define VM_INITIAL_PAGEIN 16 #endif #endif /* _MACHINE_VMPARAM_H_ */
