1 /* $NetBSD: vmparam.h,v 1.8 2001/11/23 18:16:12 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1988 The Regents of the University of California. 5 * All rights reserved. 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 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef _ARM32_VMPARAM_H_ 37 #define _ARM32_VMPARAM_H_ 38 39 #ifdef _KERNEL 40 41 #include <arm/arm32/vmparam.h> 42 43 /* 44 * Address space constants 45 */ 46 47 /* 48 * The line between user space and kernel space 49 * Mappings >= KERNEL_SPACE_START are constant across all processes 50 */ 51 #define KERNEL_SPACE_START 0xf0000000 52 53 /* Various constants used by the MD code*/ 54 #define KERNEL_BASE 0xf0000000 55 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0xc000) 56 #define ALT_PAGE_TBLS_BASE 0xf0c00000 57 #define KERNEL_VM_BASE 0xf1000000 58 /* 59 * The Kernel VM Size varies depending on the machine depending on how 60 * much space is needed (and where) for other mappings. 61 * In some cases the chosen value may not be the maximum in order that 62 * we don't waste memory with kernel pages tables as we can't currently 63 * grow the kernel page tables after booting. 64 * You only need to increase these values if you find that the number of 65 * buffers is being limited due to lack of VA space. 66 */ 67 /* 68 * The range 0xf1000000 - 0xfcffffff is available for kernel VM space 69 * Footbridge registers and I/O mappings occupy 0xfd000000 - 0xffffffff 70 */ 71 #define KERNEL_VM_SIZE 0x06000000 72 #define PROCESS_PAGE_TBLS_BASE PAGE_TABLE_SPACE_START 73 74 /* 75 * Override the default pager_map size, there's not enough KVA. 76 */ 77 #define PAGER_MAP_SIZE (4 * 1024 * 1024) 78 79 /* 80 * Size of User Raw I/O map 81 */ 82 83 #define USRIOSIZE 300 84 85 /* XXX max. amount of KVM to be used by buffers. */ 86 #ifndef VM_MAX_KERNEL_BUF 87 #define VM_MAX_KERNEL_BUF \ 88 ((VM_MAXKERN_ADDRESS - KERNEL_VM_BASE) * 4 / 10) 89 #endif 90 91 /* virtual sizes (bytes) for various kernel submaps */ 92 93 #define VM_PHYS_SIZE (USRIOSIZE*NBPG) 94 95 /* 96 * max number of non-contig chunks of physical RAM you can have 97 */ 98 99 #define VM_PHYSSEG_MAX 32 100 101 /* 102 * when converting a physical address to a vm_page structure, we 103 * want to use a binary search on the chunks of physical memory 104 * to find our RAM 105 */ 106 107 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 108 109 /* 110 * this indicates that we can't add RAM to the VM system after the 111 * vm system is init'd. 112 */ 113 114 #define VM_PHYSSEG_NOADD 115 116 /* 117 * we support 2 free lists: 118 * 119 * - DEFAULT for all systems 120 * - ISADMA for the ISA DMA range on Sharks only 121 */ 122 123 #define VM_NFREELIST 2 124 #define VM_FREELIST_DEFAULT 0 125 #define VM_FREELIST_ISADMA 1 126 127 #endif /* _KERNEL */ 128 129 #endif /* _ARM32_VMPARAM_H_ */ 130