1 /*- 2 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 3 * Copyright (C) 1995, 1996 TooLs GmbH. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by TooLs GmbH. 17 * 4. The name of TooLs GmbH may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 * $NetBSD: pmap.h,v 1.17 2000/03/30 16:18:24 jdolecek Exp $ 32 * $FreeBSD$ 33 */ 34 35 #ifndef _MACHINE_PMAP_H_ 36 #define _MACHINE_PMAP_H_ 37 38 #include <machine/pte.h> 39 40 /* 41 * Segment registers 42 */ 43 #ifndef LOCORE 44 typedef u_int sr_t; 45 #endif /* LOCORE */ 46 #define SR_TYPE 0x80000000 47 #define SR_SUKEY 0x40000000 48 #define SR_PRKEY 0x20000000 49 #define SR_VSID 0x00ffffff 50 51 #ifndef LOCORE 52 53 struct pv_entry { 54 struct pv_entry *pv_next; /* Linked list of mappings */ 55 int pv_idx; /* Index into ptable */ 56 vm_offset_t pv_va; /* virtual address of mapping */ 57 }; 58 59 struct md_page { 60 int pv_list_count; 61 int pv_flags; 62 TAILQ_HEAD(,pv_entry) pv_list; 63 }; 64 65 /* 66 * Pmap stuff 67 */ 68 struct pmap { 69 sr_t pm_sr[16]; /* segments used in this pmap */ 70 int pm_refs; /* ref count */ 71 struct pmap_statistics pm_stats; /* pmap statistics */ 72 }; 73 74 typedef struct pmap *pmap_t; 75 76 typedef struct pv_entry *pv_entry_t; 77 78 #ifdef _KERNEL 79 80 #define pmap_clear_modify(pg) (ptemodify((pg), PTE_CHG, 0)) 81 #define pmap_clear_reference(pg) (ptemodify((pg), PTE_REF, 0)) 82 #define pmap_is_modified(pg) (ptebits((pg), PTE_CHG)) 83 #define pmap_is_referenced(pg) (ptebits((pg), PTE_REF)) 84 #define pmap_unwire(pm, va) 85 86 #define pmap_phys_address(x) (x) 87 88 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) 89 90 extern pmap_t kernel_pmap; 91 92 extern vm_offset_t avail_end; 93 extern vm_offset_t avail_start; 94 extern vm_offset_t phys_avail[]; 95 extern vm_offset_t virtual_avail; 96 extern vm_offset_t virtual_end; 97 98 void pmap_bootstrap __P((u_int kernelstart, u_int kernelend)); 99 vm_offset_t pmap_steal_memory __P((vm_size_t)); 100 boolean_t ptemodify __P((struct vm_page *, u_int, u_int)); 101 int ptebits __P((struct vm_page *, int)); 102 103 #if 0 104 #define PMAP_NEED_PROCWR 105 void pmap_procwr __P((struct proc *, vaddr_t, size_t)); 106 #endif 107 108 /* 109 * Alternate mapping hooks for pool pages. Avoids thrashing the TLB. 110 * 111 * Note: This won't work if we have more memory than can be direct-mapped 112 * VA==PA all at once. But pmap_copy_page() and pmap_zero_page() will have 113 * this problem, too. 114 */ 115 #define PMAP_MAP_POOLPAGE(pa) (pa) 116 #define PMAP_UNMAP_POOLPAGE(pa) (pa) 117 118 #define vtophys(va) pmap_kextract(((vm_offset_t) (va))) 119 120 extern pte_t PTmap[]; 121 122 #define vtopte(x) (PTmap + powerpc_btop(x)) 123 124 static __inline vm_offset_t 125 pmap_kextract(vm_offset_t va) 126 { 127 /* XXX: coming soon... */ 128 return (0); 129 } 130 131 #endif /* _KERNEL */ 132 #endif /* LOCORE */ 133 134 #endif /* _MACHINE_PMAP_H_ */ 135