pmap.h revision 1.10.4.2
1 1.10.4.2 nathanw /* $NetBSD: pmap.h,v 1.10.4.2 2002/01/08 00:28:09 nathanw Exp $ */ 2 1.10.4.2 nathanw 3 1.10.4.2 nathanw /*- 4 1.10.4.2 nathanw * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 1.10.4.2 nathanw * All rights reserved. 6 1.10.4.2 nathanw * 7 1.10.4.2 nathanw * Redistribution and use in source and binary forms, with or without 8 1.10.4.2 nathanw * modification, are permitted provided that the following conditions 9 1.10.4.2 nathanw * are met: 10 1.10.4.2 nathanw * 1. Redistributions of source code must retain the above copyright 11 1.10.4.2 nathanw * notice, this list of conditions and the following disclaimer. 12 1.10.4.2 nathanw * 2. Redistributions in binary form must reproduce the above copyright 13 1.10.4.2 nathanw * notice, this list of conditions and the following disclaimer in the 14 1.10.4.2 nathanw * documentation and/or other materials provided with the distribution. 15 1.10.4.2 nathanw * 3. All advertising materials mentioning features or use of this software 16 1.10.4.2 nathanw * must display the following acknowledgement: 17 1.10.4.2 nathanw * This product includes software developed by the NetBSD 18 1.10.4.2 nathanw * Foundation, Inc. and its contributors. 19 1.10.4.2 nathanw * 4. Neither the name of The NetBSD Foundation nor the names of its 20 1.10.4.2 nathanw * contributors may be used to endorse or promote products derived 21 1.10.4.2 nathanw * from this software without specific prior written permission. 22 1.10.4.2 nathanw * 23 1.10.4.2 nathanw * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 24 1.10.4.2 nathanw * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 1.10.4.2 nathanw * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 1.10.4.2 nathanw * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 27 1.10.4.2 nathanw * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 1.10.4.2 nathanw * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 1.10.4.2 nathanw * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 1.10.4.2 nathanw * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 1.10.4.2 nathanw * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 1.10.4.2 nathanw * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 1.10.4.2 nathanw * POSSIBILITY OF SUCH DAMAGE. 34 1.10.4.2 nathanw */ 35 1.10.4.2 nathanw 36 1.10.4.2 nathanw #ifndef _MACHINE_PMAP_H 37 1.10.4.2 nathanw #define _MACHINE_PMAP_H 38 1.10.4.2 nathanw 39 1.10.4.2 nathanw /* 40 1.10.4.2 nathanw * NB: The details of struct pmap are exposed ONLY when 41 1.10.4.2 nathanw * building a kernel. LKMs and user-level programs see 42 1.10.4.2 nathanw * only this anonymous declaration. Note that the actual 43 1.10.4.2 nathanw * declaration may vary on different m68k kernels. 44 1.10.4.2 nathanw */ 45 1.10.4.2 nathanw struct pmap; 46 1.10.4.2 nathanw typedef struct pmap *pmap_t; 47 1.10.4.2 nathanw 48 1.10.4.2 nathanw /* 49 1.10.4.2 nathanw * Physical map structures exported to the VM code. 50 1.10.4.2 nathanw * XXX - Does user-level code really see this struct? 51 1.10.4.2 nathanw */ 52 1.10.4.2 nathanw 53 1.10.4.2 nathanw struct pmap { 54 1.10.4.2 nathanw unsigned char *pm_segmap; /* soft copy of segmap */ 55 1.10.4.2 nathanw int pm_ctxnum; /* MMU context number */ 56 1.10.4.2 nathanw struct simplelock pm_lock; /* lock on pmap */ 57 1.10.4.2 nathanw int pm_refcount; /* reference count */ 58 1.10.4.2 nathanw int pm_version; 59 1.10.4.2 nathanw }; 60 1.10.4.2 nathanw 61 1.10.4.2 nathanw #ifdef _KERNEL 62 1.10.4.2 nathanw extern struct pmap kernel_pmap_store; 63 1.10.4.2 nathanw #define pmap_kernel() (&kernel_pmap_store) 64 1.10.4.2 nathanw 65 1.10.4.2 nathanw /* 66 1.10.4.2 nathanw * We give the pmap code a chance to resolve faults by 67 1.10.4.2 nathanw * reloading translations that it was forced to unload. 68 1.10.4.2 nathanw * This function does that, and calls vm_fault if it 69 1.10.4.2 nathanw * could not resolve the fault by reloading the MMU. 70 1.10.4.2 nathanw */ 71 1.10.4.2 nathanw int _pmap_fault __P((struct vm_map *, vaddr_t, vm_prot_t)); 72 1.10.4.2 nathanw 73 1.10.4.2 nathanw /* This lets us have some say in choosing VA locations. */ 74 1.10.4.2 nathanw extern void pmap_prefer __P((vaddr_t, vaddr_t *)); 75 1.10.4.2 nathanw #define PMAP_PREFER(fo, ap) pmap_prefer((fo), (ap)) 76 1.10.4.2 nathanw 77 1.10.4.2 nathanw /* This needs to be a macro for kern_sysctl.c */ 78 1.10.4.2 nathanw extern segsz_t pmap_resident_pages(pmap_t); 79 1.10.4.2 nathanw #define pmap_resident_count(pmap) (pmap_resident_pages(pmap)) 80 1.10.4.2 nathanw 81 1.10.4.2 nathanw /* This needs to be a macro for vm_mmap.c */ 82 1.10.4.2 nathanw extern segsz_t pmap_wired_pages(pmap_t); 83 1.10.4.2 nathanw #define pmap_wired_count(pmap) (pmap_wired_pages(pmap)) 84 1.10.4.2 nathanw 85 1.10.4.2 nathanw /* We use the PA plus some low bits for device mmap. */ 86 1.10.4.2 nathanw #define pmap_phys_address(addr) (addr) 87 1.10.4.2 nathanw 88 1.10.4.2 nathanw #define pmap_update(pmap) /* nothing (yet) */ 89 1.10.4.2 nathanw 90 1.10.4.2 nathanw /* Map a given physical region to a virtual region */ 91 1.10.4.2 nathanw extern vaddr_t pmap_map __P((vaddr_t, paddr_t, paddr_t, int)); 92 1.10.4.2 nathanw 93 1.10.4.2 nathanw /* Extract the PMEG for a given physical address. */ 94 1.10.4.2 nathanw extern int _pmap_extract_pmeg __P((pmap_t, vaddr_t)); 95 1.10.4.2 nathanw 96 1.10.4.2 nathanw /* 97 1.10.4.2 nathanw * Since PTEs also contain type bits, we have to have some way 98 1.10.4.2 nathanw * to tell pmap_enter `this is an IO page' or `this is not to 99 1.10.4.2 nathanw * be cached'. Since physical addresses are always aligned, we 100 1.10.4.2 nathanw * can do this with the low order bits. 101 1.10.4.2 nathanw * 102 1.10.4.2 nathanw * The values below must agree with pte.h such that: 103 1.10.4.2 nathanw * (PMAP_OBIO << PG_MOD_SHIFT) == PGT_OBIO 104 1.10.4.2 nathanw */ 105 1.10.4.2 nathanw #define PMAP_OBMEM 0x00 106 1.10.4.2 nathanw #define PMAP_OBIO 0x04 /* tells pmap_enter to use PG_OBIO */ 107 1.10.4.2 nathanw #define PMAP_MBMEM 0x08 /* etc (sun-2/120) */ 108 1.10.4.2 nathanw #define PMAP_MBIO 0x0C /* etc (sun-2/120) */ 109 1.10.4.2 nathanw #define PMAP_VME0 0x08 /* etc (sun-2/50) */ 110 1.10.4.2 nathanw #define PMAP_VME8 0x0C /* etc (sun-2/50) */ 111 1.10.4.2 nathanw #define PMAP_NC 0x00 /* tells pmap_enter to set PG_NC */ 112 1.10.4.2 nathanw #define PMAP_SPEC 0x0C /* mask to get all above. */ 113 1.10.4.2 nathanw 114 1.10.4.2 nathanw #endif /* _KERNEL */ 115 1.10.4.2 nathanw 116 1.10.4.2 nathanw void pmap_procwr __P((struct proc *, vaddr_t, size_t)); 117 1.10.4.2 nathanw 118 1.10.4.2 nathanw #endif /* _MACHINE_PMAP_H */ 119
Indexes created Thu Oct 23 22:10:10 GMT 2025