1 /* $NetBSD: pmap.h,v 1.1 2001/03/29 04:44:20 fredette 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 * 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 NetBSD 18 * Foundation, Inc. and its contributors. 19 * 4. Neither the name of The NetBSD Foundation nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #ifndef _MACHINE_PMAP_H 37 #define _MACHINE_PMAP_H 38 39 /* 40 * NB: The details of struct pmap are exposed ONLY when 41 * building a kernel. LKMs and user-level programs see 42 * only this anonymous declaration. Note that the actual 43 * declaration may vary on different m68k kernels. 44 */ 45 struct pmap; 46 typedef struct pmap *pmap_t; 47 48 /* 49 * Physical map structures exported to the VM code. 50 * XXX - Does user-level code really see this struct? 51 */ 52 53 struct pmap { 54 unsigned char *pm_segmap; /* soft copy of segmap */ 55 int pm_ctxnum; /* MMU context number */ 56 simple_lock_data_t pm_lock; /* lock on pmap */ 57 int pm_refcount; /* reference count */ 58 int pm_version; 59 }; 60 61 #ifdef _KERNEL 62 extern struct pmap kernel_pmap_store; 63 #define pmap_kernel() (&kernel_pmap_store) 64 65 /* 66 * We give the pmap code a chance to resolve faults by 67 * reloading translations that it was forced to unload. 68 * This function does that, and calls vm_fault if it 69 * could not resolve the fault by reloading the MMU. 70 */ 71 int _pmap_fault __P((vm_map_t, vm_offset_t, vm_prot_t)); 72 73 /* This lets us have some say in choosing VA locations. */ 74 extern void pmap_prefer(vm_offset_t, vm_offset_t *); 75 #define PMAP_PREFER(fo, ap) pmap_prefer((fo), (ap)) 76 77 /* This needs to be a macro for kern_sysctl.c */ 78 extern segsz_t pmap_resident_pages(pmap_t); 79 #define pmap_resident_count(pmap) (pmap_resident_pages(pmap)) 80 81 /* This needs to be a macro for vm_mmap.c */ 82 extern segsz_t pmap_wired_pages(pmap_t); 83 #define pmap_wired_count(pmap) (pmap_wired_pages(pmap)) 84 85 /* We use the PA plus some low bits for device mmap. */ 86 #define pmap_phys_address(addr) (addr) 87 88 /* Our memory is contiguous (or nearly so). */ 89 #define pmap_page_index(pa) (atop(pa)) 90 91 /* Map a given physical region to a virtual region */ 92 extern vm_offset_t pmap_map __P((vm_offset_t, vm_offset_t, vm_offset_t, int)); 93 94 /* 95 * Since PTEs also contain type bits, we have to have some way 96 * to tell pmap_enter `this is an IO page' or `this is not to 97 * be cached'. Since physical addresses are always aligned, we 98 * can do this with the low order bits. 99 * 100 * The values below must agree with pte.h such that: 101 * (PMAP_OBIO << PG_MOD_SHIFT) == PGT_OBIO 102 */ 103 #define PMAP_OBIO 0x04 /* tells pmap_enter to use PG_OBIO */ 104 #define PMAP_VME16 0x08 /* etc */ 105 #define PMAP_MBMEM 0x08 /* etc (sun-2/120) */ 106 #define PMAP_MBIO 0x0C /* etc (sun-2/120) */ 107 /* 0x0C is also used for ??? on the 2/50 */ 108 #define PMAP_NC 0x00 /* tells pmap_enter to set PG_NC */ 109 #define PMAP_SPEC 0x0C /* mask to get all above. */ 110 111 #endif /* _KERNEL */ 112 113 void pmap_procwr __P((struct proc *, vaddr_t, size_t)); 114 115 #endif /* _MACHINE_PMAP_H */ 116