1 /* $NetBSD: vmparam.h,v 1.37 2013/01/07 16:58:09 chs Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef _SUN3_VMPARAM_H_ 30 #define _SUN3_VMPARAM_H_ 1 31 32 #define __USE_TOPDOWN_VM 33 34 /* 35 * We use 8K pages on both the sun3 and sun3x. Override PAGE_* 36 * to be compile-time constants. 37 */ 38 #define PAGE_SHIFT 13 39 #define PAGE_SIZE (1 << PAGE_SHIFT) 40 #define PAGE_MASK (PAGE_SIZE - 1) 41 42 #define USRSTACK kernbase /* for modules */ 43 #define USRSTACK3 KERNBASE3 /* for asm not in modules */ 44 #define USRSTACK3X KERNBASE3X 45 46 #ifdef _SUN3_ 47 #include <machine/vmparam3.h> 48 #endif /* SUN3 */ 49 #ifdef _SUN3X_ 50 #include <machine/vmparam3x.h> 51 #endif /* SUN3X */ 52 53 /* default for modules etc. */ 54 #if !defined(_SUN3_) && !defined(_SUN3X_) 55 #include <machine/vmparam3.h> 56 #endif 57 58 /* 59 * PTEs for mapping user space into the kernel for phyio operations. 60 * The actual limitation for physio requests will be the DVMA space, 61 * and that is fixed by hardware design at 1MB. We could make the 62 * physio map larger than that, but it would not buy us much. 63 */ 64 #ifndef USRIOSIZE 65 #define USRIOSIZE 128 /* 1 MB */ 66 #endif 67 68 /* This is needed by some LKMs. */ 69 #define VM_PHYSSEG_MAX 4 70 71 /* 72 * Mach-derived constants: 73 */ 74 75 /* user/kernel map constants */ 76 #define VM_MIN_ADDRESS ((vaddr_t)0) 77 #define VM_MAX_ADDRESS kernbase 78 #define VM_MAXUSER_ADDRESS kernbase 79 #define VM_MIN_KERNEL_ADDRESS kernbase 80 #define VM_MAX_KERNEL_ADDRESS kern_end 81 82 /* virtual sizes (bytes) for various kernel submaps */ 83 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 84 85 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 86 87 #define VM_NFREELIST 1 88 #define VM_FREELIST_DEFAULT 0 89 90 #endif /* _SUN3_VMPARAM_H_ */ 91