1 /* $NetBSD: pmap.h,v 1.29 2010/11/14 13:33:21 uebayasi 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 struct vm_page *pm_ptphint; 55 struct vm_page *pm_pdir_pg; /* vm_page for pdir */ 56 volatile uint32_t *pm_pdir; /* page dir (read-only after create) */ 57 pa_space_t pm_space; /* space id (read-only after create) */ 58 u_int pm_pid; /* prot id (read-only after create) */ 59 60 struct pmap_statistics pm_stats; 61 }; 62 63 #define PVF_MOD PTE_PROT(TLB_DIRTY) /* pg/mp is modified */ 64 #define PVF_REF PTE_PROT(TLB_REFTRAP) /* pg/mp (inv) is referenced */ 65 #define PVF_WRITE PTE_PROT(TLB_WRITE) /* pg/mp is writable */ 66 #define PVF_UNCACHEABLE PTE_PROT(TLB_UNCACHEABLE) /* pg/mp is uncacheable */ 67 68 #define HPPA_MAX_PID 0xfffa 69 #define HPPA_SID_MAX 0x7ffd 70 71 /* 72 * DON'T CHANGE THIS - this is assumed in lots of places. 73 */ 74 #define HPPA_SID_KERNEL 0 75 #define HPPA_PID_KERNEL 2 76 77 struct pv_entry { /* locked by its list's pvh_lock */ 78 struct pv_entry *pv_next; 79 struct pmap *pv_pmap; /* the pmap */ 80 vaddr_t pv_va; /* the virtual address + flags */ 81 #define PV_VAMASK (~(PAGE_SIZE - 1)) 82 #define PV_KENTER 0x001 83 84 struct vm_page *pv_ptp; /* the vm_page of the PTP */ 85 }; 86 87 extern int pmap_hptsize; 88 extern struct pdc_hwtlb pdc_hwtlb; 89 90 /* 91 * pool quickmaps 92 */ 93 static inline vaddr_t hppa_map_poolpage(paddr_t pa) 94 { 95 return (vaddr_t)pa; 96 } 97 98 static inline paddr_t hppa_unmap_poolpage(vaddr_t va) 99 { 100 pdcache(HPPA_SID_KERNEL, va, PAGE_SIZE); 101 102 #if defined(HP8000_CPU) || defined(HP8200_CPU) || \ 103 defined(HP8500_CPU) || defined(HP8600_CPU) 104 ficache(HPPA_SID_KERNEL, va, PAGE_SIZE); 105 pdtlb(HPPA_SID_KERNEL, va); 106 pitlb(HPPA_SID_KERNEL, va); 107 #endif 108 109 return (paddr_t)va; 110 } 111 112 #define PMAP_MAP_POOLPAGE(pa) hppa_map_poolpage(pa) 113 #define PMAP_UNMAP_POOLPAGE(va) hppa_unmap_poolpage(va) 114 115 /* 116 * according to the parisc manual aliased va's should be 117 * different by high 12 bits only. 118 */ 119 #define PMAP_PREFER(o,h,s,td) do { \ 120 vaddr_t pmap_prefer_hint; \ 121 pmap_prefer_hint = (*(h) & HPPA_PGAMASK) | ((o) & HPPA_PGAOFF); \ 122 if (pmap_prefer_hint < *(h)) \ 123 pmap_prefer_hint += HPPA_PGALIAS; \ 124 *(h) = pmap_prefer_hint; \ 125 } while(0) 126 127 #define pmap_sid2pid(s) (((s) + 1) << 1) 128 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) 129 #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count) 130 #define pmap_update(p) 131 132 #define pmap_copy(dpmap,spmap,da,len,sa) 133 134 #define pmap_clear_modify(pg) pmap_changebit(pg, 0, PTE_PROT(TLB_DIRTY)) 135 #define pmap_clear_reference(pg) \ 136 pmap_changebit(pg, PTE_PROT(TLB_REFTRAP), 0) 137 #define pmap_is_modified(pg) pmap_testbit(pg, PTE_PROT(TLB_DIRTY)) 138 #define pmap_is_referenced(pg) pmap_testbit(pg, PTE_PROT(TLB_REFTRAP)) 139 #define pmap_phys_address(ppn) ((ppn) << PAGE_SHIFT) 140 141 void pmap_activate(struct lwp *); 142 143 void pmap_bootstrap(vaddr_t); 144 bool pmap_changebit(struct vm_page *, u_int, u_int); 145 bool pmap_testbit(struct vm_page *, u_int); 146 void pmap_write_protect(struct pmap *, vaddr_t, vaddr_t, vm_prot_t); 147 void pmap_remove(struct pmap *pmap, vaddr_t sva, vaddr_t eva); 148 void pmap_page_remove(struct vm_page *pg); 149 150 static inline void 151 pmap_deactivate(struct lwp *l) 152 { 153 /* Nothing. */ 154 } 155 156 static inline void 157 pmap_remove_all(struct pmap *pmap) 158 { 159 /* Nothing. */ 160 } 161 162 static inline int 163 pmap_prot(struct pmap *pmap, int prot) 164 { 165 extern u_int hppa_prot[]; 166 return (hppa_prot[prot] | (pmap == pmap_kernel()? 0 : TLB_USER)); 167 } 168 169 static inline void 170 pmap_page_protect(struct vm_page *pg, vm_prot_t prot) 171 { 172 if ((prot & UVM_PROT_WRITE) == 0) { 173 if (prot & (UVM_PROT_RX)) 174 pmap_changebit(pg, 0, PTE_PROT(TLB_WRITE)); 175 else 176 pmap_page_remove(pg); 177 } 178 } 179 180 static inline void 181 pmap_protect(struct pmap *pmap, vaddr_t sva, vaddr_t eva, vm_prot_t prot) 182 { 183 if ((prot & UVM_PROT_WRITE) == 0) { 184 if (prot & (UVM_PROT_RX)) 185 pmap_write_protect(pmap, sva, eva, prot); 186 else 187 pmap_remove(pmap, sva, eva); 188 } 189 } 190 191 #define pmap_sid(pmap, va) \ 192 ((((va) & 0xc0000000) != 0xc0000000) ? \ 193 (pmap)->pm_space : HPPA_SID_KERNEL) 194 195 #define __HAVE_VM_PAGE_MD 196 197 struct pv_entry; 198 199 struct vm_page_md { 200 struct kmutex pvh_lock; /* locks every pv on this list */ 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 mutex_init(&(pg)->mdpage.pvh_lock, MUTEX_NODEBUG, IPL_VM); \ 209 (pg)->mdpage.pvh_list = NULL; \ 210 (pg)->mdpage.pvh_attrs = 0; \ 211 (pg)->mdpage.pvh_aliases = 0; \ 212 } while (0) 213 214 #endif /* _KERNEL */ 215 216 #endif /* _HPPA_PMAP_H_ */ 217