1 /* $OpenBSD: pmap.h,v 1.56 2023/12/11 22:12:53 kettenis Exp $ */ 2 3 /* 4 * Copyright (c) 2002-2004 Michael Shalayeff 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, 20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 25 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 26 * THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef _MACHINE_PMAP_H_ 30 #define _MACHINE_PMAP_H_ 31 32 #include <uvm/uvm_object.h> 33 #include <sys/mutex.h> 34 35 #ifdef _KERNEL 36 #include <sys/systm.h> 37 #include <machine/pte.h> 38 39 struct pmap { 40 struct mutex pm_mtx; 41 struct uvm_object pm_obj; 42 struct vm_page *pm_ptphint; 43 struct vm_page *pm_pdir_pg; /* vm_page for pdir */ 44 volatile u_int32_t *pm_pdir; /* page dir (read-only after create) */ 45 pa_space_t pm_space; /* space id (read-only after create) */ 46 u_int pm_pid; /* prot id (read-only after create) */ 47 48 struct pmap_statistics pm_stats; 49 }; 50 typedef struct pmap *pmap_t; 51 52 #define HPPA_MAX_PID 0xfffa 53 #define HPPA_SID_MAX 0x7ffd 54 #define HPPA_SID_KERNEL 0 55 #define HPPA_PID_KERNEL 2 56 57 #define KERNEL_ACCESS_ID 1 58 #define KERNEL_TEXT_PROT (TLB_AR_KRX | (KERNEL_ACCESS_ID << 1)) 59 #define KERNEL_DATA_PROT (TLB_AR_KRW | (KERNEL_ACCESS_ID << 1)) 60 61 struct pv_entry { /* locked by its list's pvh_lock */ 62 struct pv_entry *pv_next; 63 struct pmap *pv_pmap; /* the pmap */ 64 vaddr_t pv_va; /* the virtual address */ 65 struct vm_page *pv_ptp; /* the vm_page of the PTP */ 66 }; 67 68 /* also match the hardware tlb walker definition */ 69 struct vp_entry { 70 u_int vp_tag; 71 u_int vp_tlbprot; 72 u_int vp_tlbpage; 73 u_int vp_ptr; 74 }; 75 76 extern void gateway_page(void); 77 extern struct pmap kernel_pmap_store; 78 79 #if defined(HP7100LC_CPU) || defined(HP7300LC_CPU) 80 extern int pmap_hptsize; 81 extern struct pdc_hwtlb pdc_hwtlb; 82 #endif 83 84 /* 85 * pool quickmaps 86 */ 87 #define pmap_map_direct(pg) ((vaddr_t)VM_PAGE_TO_PHYS(pg)) 88 struct vm_page *pmap_unmap_direct(vaddr_t); 89 #define __HAVE_PMAP_DIRECT 90 91 /* 92 * according to the parisc manual aliased va's should be 93 * different by high 12 bits only. 94 */ 95 #define PMAP_PREFER 96 /* pmap prefer alignment */ 97 #define PMAP_PREFER_ALIGN() (HPPA_PGALIAS) 98 /* pmap prefer offset within alignment */ 99 #define PMAP_PREFER_OFFSET(of) ((of) & HPPA_PGAOFF) 100 101 #define pmap_sid2pid(s) (((s) + 1) << 1) 102 #define pmap_kernel() (&kernel_pmap_store) 103 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) 104 #define pmap_update(pm) (void)(pm) 105 106 #define PG_PMAP_MOD PG_PMAP0 /* modified */ 107 #define PG_PMAP_REF PG_PMAP1 /* referenced */ 108 109 #define pmap_clear_modify(pg) pmap_changebit(pg, 0, PTE_PROT(TLB_DIRTY)) 110 #define pmap_clear_reference(pg) pmap_changebit(pg, PTE_PROT(TLB_REFTRAP), 0) 111 #define pmap_is_modified(pg) pmap_testbit(pg, PG_PMAP_MOD) 112 #define pmap_is_referenced(pg) pmap_testbit(pg, PG_PMAP_REF) 113 114 #define pmap_init_percpu() do { /* nothing */ } while (0) 115 #define pmap_unuse_final(p) /* nothing */ 116 #define pmap_remove_holes(vm) do { /* nothing */ } while (0) 117 118 void pmap_bootstrap(vaddr_t); 119 boolean_t pmap_changebit(struct vm_page *, pt_entry_t, pt_entry_t); 120 boolean_t pmap_testbit(struct vm_page *, int); 121 void pmap_page_write_protect(struct vm_page *); 122 void pmap_write_protect(struct pmap *, vaddr_t, vaddr_t, vm_prot_t); 123 void pmap_remove(struct pmap *pmap, vaddr_t sva, vaddr_t eva); 124 void pmap_page_remove(struct vm_page *pg); 125 126 static __inline int 127 pmap_prot(struct pmap *pmap, int prot) 128 { 129 extern u_int hppa_prot[]; 130 return (hppa_prot[prot] | (pmap == pmap_kernel()? 0 : TLB_USER)); 131 } 132 133 static __inline void 134 pmap_page_protect(struct vm_page *pg, vm_prot_t prot) 135 { 136 if (prot == PROT_READ) { 137 pmap_page_write_protect(pg); 138 } else { 139 KASSERT(prot == PROT_NONE); 140 pmap_page_remove(pg); 141 } 142 } 143 144 static __inline void 145 pmap_protect(struct pmap *pmap, vaddr_t sva, vaddr_t eva, vm_prot_t prot) 146 { 147 if (prot != PROT_NONE) 148 pmap_write_protect(pmap, sva, eva, prot); 149 else 150 pmap_remove(pmap, sva, eva); 151 } 152 153 #endif /* _KERNEL */ 154 155 #if !defined(_LOCORE) 156 struct pv_entry; 157 struct vm_page_md { 158 struct mutex pvh_mtx; 159 struct pv_entry *pvh_list; /* head of list (locked by pvh_mtx) */ 160 }; 161 162 #define VM_MDPAGE_INIT(pg) do { \ 163 mtx_init(&(pg)->mdpage.pvh_mtx, IPL_VM); \ 164 (pg)->mdpage.pvh_list = NULL; \ 165 } while (0) 166 #endif 167 168 #endif /* _MACHINE_PMAP_H_ */ 169