1 /* $NetBSD: pmap.h,v 1.25 2001/09/23 08:12:59 chs Exp $ */ 2 3 /*- 4 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 5 * Copyright (C) 1995, 1996 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #ifndef _MACHINE_PMAP_H_ 35 #define _MACHINE_PMAP_H_ 36 37 #include <machine/pte.h> 38 39 /* 40 * Segment registers 41 */ 42 #ifndef _LOCORE 43 typedef u_int sr_t; 44 #endif /* _LOCORE */ 45 #define SR_TYPE 0x80000000 46 #define SR_SUKEY 0x40000000 47 #define SR_PRKEY 0x20000000 48 #define SR_VSID 0x00ffffff 49 50 #ifndef _LOCORE 51 /* 52 * Pmap stuff 53 */ 54 struct pmap { 55 sr_t pm_sr[16]; /* segments used in this pmap */ 56 int pm_refs; /* ref count */ 57 struct pmap_statistics pm_stats; /* pmap statistics */ 58 }; 59 60 typedef struct pmap *pmap_t; 61 62 #ifdef _KERNEL 63 extern struct pmap kernel_pmap_; 64 #define pmap_kernel() (&kernel_pmap_) 65 66 #define pmap_clear_modify(pg) (ptemodify((pg), PTE_CHG, 0)) 67 #define pmap_clear_reference(pg) (ptemodify((pg), PTE_REF, 0)) 68 #define pmap_is_modified(pg) (ptebits((pg), PTE_CHG)) 69 #define pmap_is_referenced(pg) (ptebits((pg), PTE_REF)) 70 #define pmap_unwire(pm, va) 71 #define pmap_update(pmap) /* nothing (yet) */ 72 73 #define pmap_phys_address(x) (x) 74 75 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) 76 #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count) 77 78 void pmap_bootstrap __P((u_int kernelstart, u_int kernelend)); 79 boolean_t pmap_extract __P((struct pmap *, vaddr_t, paddr_t *)); 80 boolean_t ptemodify __P((struct vm_page *, u_int, u_int)); 81 int ptebits __P((struct vm_page *, int)); 82 void pmap_real_memory __P((paddr_t *, psize_t *)); 83 void pmap_pinit __P((pmap_t)); 84 85 #define PMAP_NEED_PROCWR 86 void pmap_procwr __P((struct proc *, vaddr_t, size_t)); 87 88 /* 89 * Alternate mapping hooks for pool pages. Avoids thrashing the TLB. 90 * 91 * Note: This won't work if we have more memory than can be direct-mapped 92 * VA==PA all at once. But pmap_copy_page() and pmap_zero_page() will have 93 * this problem, too. 94 */ 95 #define PMAP_MAP_POOLPAGE(pa) (pa) 96 #define PMAP_UNMAP_POOLPAGE(pa) (pa) 97 98 static __inline paddr_t vtophys __P((vaddr_t)); 99 100 static __inline paddr_t 101 vtophys(va) 102 vaddr_t va; 103 { 104 paddr_t pa; 105 106 /* XXX should check battable */ 107 108 if (pmap_extract(pmap_kernel(), va, &pa)) 109 return pa; 110 return va; 111 } 112 113 #endif /* _KERNEL */ 114 #endif /* _LOCORE */ 115 116 #endif /* _MACHINE_PMAP_H_ */ 117