1 /* $NetBSD: pmap3.h,v 1.36 2002/09/22 07:53:50 chs Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Adam Glass and Gordon W. Ross. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Physical map structures exported to the VM code. 41 * XXX - Does user-level code really see this struct? 42 */ 43 44 struct pmap { 45 unsigned char *pm_segmap; /* soft copy of segmap */ 46 int pm_ctxnum; /* MMU context number */ 47 struct simplelock pm_lock; /* lock on pmap */ 48 int pm_refcount; /* reference count */ 49 int pm_version; 50 }; 51 52 #ifdef _KERNEL 53 extern struct pmap kernel_pmap_store; 54 #define pmap_kernel() (&kernel_pmap_store) 55 56 /* 57 * We give the pmap code a chance to resolve faults by 58 * reloading translations that it was forced to unload. 59 * This function does that, and calls vm_fault if it 60 * could not resolve the fault by reloading the MMU. 61 */ 62 int _pmap_fault __P((struct vm_map *, vaddr_t, vm_prot_t)); 63 64 /* This lets us have some say in choosing VA locations. */ 65 extern void pmap_prefer(vaddr_t, vaddr_t *); 66 #define PMAP_PREFER(fo, ap) pmap_prefer((fo), (ap)) 67 68 /* This needs to be a macro for kern_sysctl.c */ 69 extern segsz_t pmap_resident_pages(pmap_t); 70 #define pmap_resident_count(pmap) (pmap_resident_pages(pmap)) 71 72 /* This needs to be a macro for vm_mmap.c */ 73 extern segsz_t pmap_wired_pages(pmap_t); 74 #define pmap_wired_count(pmap) (pmap_wired_pages(pmap)) 75 76 /* We use the PA plus some low bits for device mmap. */ 77 #define pmap_phys_address(addr) (addr) 78 79 #define pmap_update(pmap) /* nothing (yet) */ 80 81 /* Map a given physical region to a virtual region */ 82 extern vaddr_t pmap_map __P((vaddr_t, paddr_t, paddr_t, int)); 83 84 static __inline void 85 pmap_remove_all(struct pmap *pmap) 86 { 87 /* Nothing. */ 88 } 89 90 /* 91 * Since PTEs also contain type bits, we have to have some way 92 * to tell pmap_enter `this is an IO page' or `this is not to 93 * be cached'. Since physical addresses are always aligned, we 94 * can do this with the low order bits. 95 * 96 * The values below must agree with pte.h such that: 97 * (PMAP_OBIO << PG_MOD_SHIFT) == PGT_OBIO 98 */ 99 #define PMAP_OBIO 0x04 /* tells pmap_enter to use PG_OBIO */ 100 #define PMAP_VME16 0x08 /* etc */ 101 #define PMAP_VME32 0x0C /* etc */ 102 #define PMAP_NC 0x10 /* tells pmap_enter to set PG_NC */ 103 #define PMAP_SPEC 0x1C /* mask to get all above. */ 104 105 #endif /* _KERNEL */ 106