1 /* $NetBSD: pmap.h,v 1.36 2016/09/03 09:07:53 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by UCHIYAMA Yasushi. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * NetBSD/sh3 pmap: 34 * pmap.pm_ptp[512] ... 512 slot of page table page 35 * page table page contains 1024 PTEs. (PAGE_SIZE / sizeof(pt_entry_t)) 36 * va -> [ PTP 10bit | PTOFSET 10bit | PGOFSET 12bit ] 37 */ 38 39 #ifndef _SH3_PMAP_H_ 40 #define _SH3_PMAP_H_ 41 #include <sys/queue.h> 42 #include <sh3/pte.h> 43 44 #define PMAP_NEED_PROCWR 45 #define PMAP_STEAL_MEMORY 46 #define PMAP_GROWKERNEL 47 48 #define __PMAP_PTP_N 512 /* # of page table page maps 2GB. */ 49 struct pmap { 50 pt_entry_t **pm_ptp; 51 int pm_asid; 52 int pm_refcnt; 53 struct pmap_statistics pm_stats; /* pmap statistics */ 54 }; 55 56 void pmap_bootstrap(void); 57 void pmap_procwr(struct proc *, vaddr_t, size_t); 58 #define pmap_update(pmap) ((void)0) 59 #define pmap_copy(dp,sp,d,l,s) ((void)0) 60 #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count) 61 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) 62 63 /* ARGSUSED */ 64 static __inline void 65 pmap_remove_all(struct pmap *pmap) 66 { 67 /* Nothing. */ 68 } 69 70 /* 71 * pmap_prefer() helps to avoid virtual cache aliases on SH4 CPUs 72 * which have the virtually-indexed cache. 73 */ 74 #ifdef SH4 75 #define PMAP_PREFER(pa, va, sz, td) pmap_prefer((pa), (va), (td)) 76 void pmap_prefer(vaddr_t, vaddr_t *, int); 77 #endif /* SH4 */ 78 79 #define PMAP_MAP_POOLPAGE(pa) SH3_PHYS_TO_P1SEG((pa)) 80 #define PMAP_UNMAP_POOLPAGE(va) SH3_P1SEG_TO_PHYS((va)) 81 82 /* MD pmap utils. */ 83 pt_entry_t *__pmap_pte_lookup(pmap_t, vaddr_t); 84 pt_entry_t *__pmap_kpte_lookup(vaddr_t); 85 bool __pmap_pte_load(pmap_t, vaddr_t, int); 86 87 /* pmap-specific data store in the vm_page structure. */ 88 #define __HAVE_VM_PAGE_MD 89 #define PVH_REFERENCED 1 90 #define PVH_MODIFIED 2 91 92 struct pv_entry; 93 struct vm_page_md { 94 SLIST_HEAD(, pv_entry) pvh_head; 95 int pvh_flags; 96 }; 97 98 #define VM_MDPAGE_INIT(pg) \ 99 do { \ 100 struct vm_page_md *pvh = &(pg)->mdpage; \ 101 SLIST_INIT(&pvh->pvh_head); \ 102 pvh->pvh_flags = 0; \ 103 } while (/*CONSTCOND*/0) 104 #endif /* !_SH3_PMAP_H_ */ 105