1 /* 2 * Copyright (c) 2006 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $DragonFly: src/sys/platform/vkernel/include/vmparam.h,v 1.5 2007/01/14 00:01:07 dillon Exp $ 35 */ 36 37 #ifndef _MACHINE_VMPARAM_H_ 38 #define _MACHINE_VMPARAM_H_ 39 40 /* 41 * Indicate that read access also means execution access (XXX newer PCs 42 * have a separate bit). 43 */ 44 #define VM_PROT_READ_IS_EXEC 45 46 /* 47 * Virtual memory related constants, all in bytes 48 */ 49 #define MAXTSIZ (256UL*1024*1024) /* max text size */ 50 #ifndef DFLDSIZ 51 #define DFLDSIZ (128UL*1024*1024) /* initial data size limit */ 52 #endif 53 #ifndef MAXDSIZ 54 #define MAXDSIZ (32768UL*1024*1024) /* max data size */ 55 #endif 56 #ifndef DFLSSIZ 57 #define DFLSSIZ (8UL*1024*1024) /* initial stack size limit */ 58 #endif 59 #ifndef MAXSSIZ 60 #define MAXSSIZ (512UL*1024*1024) /* max stack size */ 61 #endif 62 #ifndef MAXTHRSSIZ 63 #define MAXTHRSSIZ (128UL*1024UL*1024*1024) /* thread stack area */ 64 #endif 65 #ifndef SGROWSIZ 66 #define SGROWSIZ (128UL*1024) /* amount to grow stack */ 67 #endif 68 69 /* 70 * After this period of time allow a process to become swappable. This 71 * parameter is mostly obsolete now. 72 */ 73 #define MAXSLP 20 74 75 /* 76 * For virtual kernels running as userland processes the user and kernel 77 * address spaces exist in different VM spaces and can overlap. 78 */ 79 #define KERNEL_KVA_START (512ULL << 30) /* From 512GB */ 80 #define KERNEL_KVA_SIZE (512UL * 1024 * 1024 * 1024) 81 #define KERNEL_STACK_SIZE (512 * PAGE_SIZE) 82 83 #define VKERNEL_USEABLE_PHYS_RAM_BASE (128ULL << 30) /* from 32GB */ 84 85 /* 86 * Do not allow the top 2MB of the user stack to be mapped to work around 87 * an AMD bug wherein the cpu can lockup or destabilize if the instruction 88 * prefetcher crosses over into non-canonical address space. Only the top 89 * 4KB needs to be disallowed, but taking out the whole 2MB allows potential 90 * 2MB PTE optimizations to be retained. 91 */ 92 #define VM_MIN_USER_ADDRESS ((vm_offset_t)0) 93 #define VM_MAX_USER_ADDRESS UVADDR(NUPML4E - 1, NPDPEPG - 1, NPDEPG - 1, 0) 94 95 #define DMAP_SIZE (512UL * 1024 * 1024 * 1024) 96 97 #define KERNBASE 0xC0000000 /* XXX totally wrong */ 98 99 #define USRSTACK VM_MAX_USER_ADDRESS 100 101 extern void *dmap_min_address; 102 #define PHYS_TO_DMAP(x) ((uint64_t)(x) + (uint64_t)dmap_min_address) 103 #define DMAP_TO_PHYS(x) ((uint64_t)(x) - (uint64_t)dmap_min_address) 104 105 /* 106 * Initial memory map preload 107 */ 108 #ifndef VM_INITIAL_PAGEIN 109 #define VM_INITIAL_PAGEIN 16 110 #endif 111 112 #endif /* _MACHINE_VMPARAM_H_ */ 113