pmap.h revision 1.30
1 /* $NetBSD: pmap.h,v 1.30 2011/06/12 03:35:41 rmind Exp $ */ 2 3 /* $OpenBSD: pmap.h,v 1.35 2007/12/14 18:32:23 deraadt Exp $ */ 4 5 /* 6 * Copyright (c) 2002-2004 Michael Shalayeff 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, 22 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 27 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 /* 32 * Pmap header for hppa. 33 */ 34 35 #ifndef _HPPA_PMAP_H_ 36 #define _HPPA_PMAP_H_ 37 38 #ifdef _KERNEL_OPT 39 #include "opt_cputype.h" 40 #endif 41 42 #include <sys/mutex.h> 43 #include <machine/pte.h> 44 #include <machine/cpufunc.h> 45 46 #include <uvm/uvm_pglist.h> 47 #include <uvm/uvm_object.h> 48 49 #ifdef _KERNEL 50 51 struct pmap { 52 struct uvm_object pm_obj; /* object (lck by object lock) */ 53 #define pm_lock pm_obj.vmobjlock 54 kmutex_t pm_obj_lock; /* lock for pm_obj */ 55 struct vm_page *pm_ptphint; 56 struct vm_page *pm_pdir_pg; /* vm_page for pdir */ 57 volatile uint32_t *pm_pdir; /* page dir (read-only after create) */ 58 pa_space_t pm_space; /* space id (read-only after create) */ 59 u_int pm_pid; /* prot id (read-only after create) */ 60 61 struct pmap_statistics pm_stats; 62 }; 63 64 #define PVF_MOD PTE_PROT(TLB_DIRTY) /* pg/mp is modified */ 65 #define PVF_REF PTE_PROT(TLB_REFTRAP) /* pg/mp (inv) is referenced */ 66 #define PVF_WRITE PTE_PROT(TLB_WRITE) /* pg/mp is writable */ 67 #define PVF_UNCACHEABLE PTE_PROT(TLB_UNCACHEABLE) /* pg/mp is uncacheable */ 68 69 #define HPPA_MAX_PID 0xfffa 70 #define HPPA_SID_MAX 0x7ffd 71 72 /* 73 * DON'T CHANGE THIS - this is assumed in lots of places. 74 */ 75 #define HPPA_SID_KERNEL 0 76 #define HPPA_PID_KERNEL 2 77 78 struct pv_entry { /* locked by its list's pvh_lock */ 79 struct pv_entry *pv_next; 80 struct pmap *pv_pmap; /* the pmap */ 81 vaddr_t pv_va; /* the virtual address + flags */ 82 #define PV_VAMASK (~(PAGE_SIZE - 1)) 83 #define PV_KENTER 0x001 84 85 struct vm_page *pv_ptp; /* the vm_page of the PTP */ 86 }; 87 88 extern int pmap_hptsize; 89 extern struct pdc_hwtlb pdc_hwtlb; 90 91 /* 92 * pool quickmaps 93 */ 94 static inline vaddr_t hppa_map_poolpage(paddr_t pa) 95 { 96 return (vaddr_t)pa; 97 } 98 99 static inline paddr_t hppa_unmap_poolpage(vaddr_t va) 100 { 101 pdcache(HPPA_SID_KERNEL, va, PAGE_SIZE); 102 103 #if defined(HP8000_CPU) || defined(HP8200_CPU) || \ 104 defined(HP8500_CPU) || defined(HP8600_CPU) 105 ficache(HPPA_SID_KERNEL, va, PAGE_SIZE); 106 pdtlb(HPPA_SID_KERNEL, va); 107 pitlb(HPPA_SID_KERNEL, va); 108 #endif 109 110 return (paddr_t)va; 111 } 112 113 #define PMAP_MAP_POOLPAGE(pa) hppa_map_poolpage(pa) 114 #define PMAP_UNMAP_POOLPAGE(va) hppa_unmap_poolpage(va) 115 116 /* 117 * according to the parisc manual aliased va's should be 118 * different by high 12 bits only. 119 */ 120 #define PMAP_PREFER(o,h,s,td) do { \ 121 vaddr_t pmap_prefer_hint; \ 122 pmap_prefer_hint = (*(h) & HPPA_PGAMASK) | ((o) & HPPA_PGAOFF); \ 123 if (pmap_prefer_hint < *(h)) \ 124 pmap_prefer_hint += HPPA_PGALIAS; \ 125 *(h) = pmap_prefer_hint; \ 126 } while(0) 127 128 #define pmap_sid2pid(s) (((s) + 1) << 1) 129 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) 130 #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count) 131 #define pmap_update(p) 132 133 #define pmap_copy(dpmap,spmap,da,len,sa) 134 135 #define pmap_clear_modify(pg) pmap_changebit(pg, 0, PTE_PROT(TLB_DIRTY)) 136 #define pmap_clear_reference(pg) \ 137 pmap_changebit(pg, PTE_PROT(TLB_REFTRAP), 0) 138 #define pmap_is_modified(pg) pmap_testbit(pg, PTE_PROT(TLB_DIRTY)) 139 #define pmap_is_referenced(pg) pmap_testbit(pg, PTE_PROT(TLB_REFTRAP)) 140 #define pmap_phys_address(ppn) ((ppn) << PAGE_SHIFT) 141 142 void pmap_activate(struct lwp *); 143 144 void pmap_bootstrap(vaddr_t); 145 bool pmap_changebit(struct vm_page *, u_int, u_int); 146 bool pmap_testbit(struct vm_page *, u_int); 147 void pmap_write_protect(struct pmap *, vaddr_t, vaddr_t, vm_prot_t); 148 void pmap_remove(struct pmap *pmap, vaddr_t sva, vaddr_t eva); 149 void pmap_page_remove(struct vm_page *pg); 150 151 static inline void 152 pmap_deactivate(struct lwp *l) 153 { 154 /* Nothing. */ 155 } 156 157 static inline void 158 pmap_remove_all(struct pmap *pmap) 159 { 160 /* Nothing. */ 161 } 162 163 static inline int 164 pmap_prot(struct pmap *pmap, int prot) 165 { 166 extern u_int hppa_prot[]; 167 return (hppa_prot[prot] | (pmap == pmap_kernel()? 0 : TLB_USER)); 168 } 169 170 static inline void 171 pmap_page_protect(struct vm_page *pg, vm_prot_t prot) 172 { 173 if ((prot & UVM_PROT_WRITE) == 0) { 174 if (prot & (UVM_PROT_RX)) 175 pmap_changebit(pg, 0, PTE_PROT(TLB_WRITE)); 176 else 177 pmap_page_remove(pg); 178 } 179 } 180 181 static inline void 182 pmap_protect(struct pmap *pmap, vaddr_t sva, vaddr_t eva, vm_prot_t prot) 183 { 184 if ((prot & UVM_PROT_WRITE) == 0) { 185 if (prot & (UVM_PROT_RX)) 186 pmap_write_protect(pmap, sva, eva, prot); 187 else 188 pmap_remove(pmap, sva, eva); 189 } 190 } 191 192 #define pmap_sid(pmap, va) \ 193 ((((va) & 0xc0000000) != 0xc0000000) ? \ 194 (pmap)->pm_space : HPPA_SID_KERNEL) 195 196 #define __HAVE_VM_PAGE_MD 197 198 struct pv_entry; 199 200 struct vm_page_md { 201 struct pv_entry *pvh_list; /* head of list (locked by pvh_lock) */ 202 u_int pvh_attrs; /* to preserve ref/mod */ 203 int pvh_aliases; /* alias counting */ 204 }; 205 206 #define VM_MDPAGE_INIT(pg) \ 207 do { \ 208 (pg)->mdpage.pvh_list = NULL; \ 209 (pg)->mdpage.pvh_attrs = 0; \ 210 (pg)->mdpage.pvh_aliases = 0; \ 211 } while (0) 212 213 #endif /* _KERNEL */ 214 215 #endif /* _HPPA_PMAP_H_ */ 216
Indexes created Mon Sep 29 21:09:56 GMT 2025