sys/rump/librump/rumpkern/pmap_stub.c

   1 /*      $NetBSD: pmap_stub.c,v 1.22 2009/11/07 12:08:35 dsl Exp $       */
   2
   3 /*
   4  * Copyright (c) 2008 Antti Kantee.  All Rights Reserved.
   5  *
   6  * Development of this software was supported by the
   7  * Finnish Cultural Foundation.
   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
  19  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  21  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  24  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  */
  30
  31 #include <sys/cdefs.h>
  32 __KERNEL_RCSID(0, "$NetBSD: pmap_stub.c,v 1.22 2009/11/07 12:08:35 dsl Exp $");
  33
  34 #include <sys/param.h>
  35
  36 #include <uvm/uvm_extern.h>
  37
  38 /* get your kicks on pmap 66 */
  39 struct pmap *const kernel_pmap_ptr = (struct pmap *const)0x66;
  40
  41 /*
  42  * Provide a userspace pmap with the headers the kernel gives us.
  43  * This results in some arch-specific frobbling which
  44  * cannot really be easily avoided until the pmap interface is
  45  * specified with something else than a .h and autogenerated into C.
  46  */
  47
  48 #if defined(__sparc__) && !defined(__sparc_v9__)
  49 #undef pmap_is_modified
  50 #undef pmap_clear_modify
  51 #undef pmap_kenter_pa
  52 #undef pmap_kremove
  53 #undef pmap_page_protect
  54 #undef pmap_extract
  55 #undef pmap_enter
  56
  57 bool pmap_is_modified(struct vm_page *);
  58 bool pmap_clear_modify(struct vm_page *);
  59 void pmap_kenter_pa(vaddr_t, paddr_t, vm_prot_t, u_int);
  60 void pmap_kremove(vaddr_t, vsize_t);
  61 void pmap_page_protect(struct vm_page *, vm_prot_t);
  62 bool pmap_extract(pmap_t, vaddr_t, paddr_t *);
  63 int pmap_enter(pmap_t, vaddr_t, paddr_t, vm_prot_t, u_int);
  64 #endif
  65
  66 #if !defined(pmap_is_modified) && !defined(__vax__)
  67 bool
  68 pmap_is_modified(struct vm_page *pg)
  69 {
  70
  71         return true;
  72 }
  73 #endif
  74
  75 #if !defined(pmap_clear_modify) && !defined(__vax__)
  76 bool
  77 pmap_clear_modify(struct vm_page *pg)
  78 {
  79
  80         return true;
  81 }
  82 #endif
  83
  84 #ifndef pmap_update
  85 void
  86 pmap_update(pmap_t pmap)
  87 {
  88
  89 }
  90 #endif
  91
  92 void
  93 pmap_kenter_pa(vaddr_t va, paddr_t pa, vm_prot_t prot, u_int fl)
  94 {
  95
  96         panic("%s: unavailable", __func__);
  97 }
  98
  99 void
 100 pmap_kremove(vaddr_t va, vsize_t size)
 101 {
 102
 103         panic("%s: unavailable", __func__);
 104 }
 105
 106 int
 107 pmap_enter(pmap_t pmap, vaddr_t va, paddr_t pa, vm_prot_t prot, u_int flags)
 108 {
 109
 110         panic("%s: unavailable", __func__);
 111 }
 112
 113 /*
 114  * It's a brave new world.
 115  */
 116 #if !defined(__vax__)
 117
 118 void
 119 pmap_remove(pmap_t pmap, vaddr_t sva, vaddr_t eva)
 120 {
 121
 122         panic("%s: unavailable", __func__);
 123 }
 124
 125 bool
 126 pmap_extract(pmap_t pmap, vaddr_t va, paddr_t *pap)
 127 {
 128
 129         *pap = va;
 130         return true;
 131 }
 132
 133 #endif
 134
 135 /*
 136  * Begin MD stubs
 137  */
 138 #if !defined(__i386__) && !defined(__x86_64__) && \
 139     !defined(__hppa__) && \
 140     !defined(__vax__)
 141 void
 142 pmap_page_protect(struct vm_page *pg, vm_prot_t prot)
 143 {
 144
 145         /* nada */
 146 }
 147 #endif
 148
 149 #ifdef __hppa__
 150 void
 151 pmap_page_remove(struct vm_page *pg)
 152 {
 153
 154 }
 155
 156 bool
 157 pmap_changebit(struct vm_page *pg, unsigned int set, unsigned int clear)
 158 {
 159
 160         return true;
 161 }
 162
 163 bool
 164 pmap_testbit(struct vm_page *pg, unsigned int bit)
 165 {
 166
 167         return true;
 168 }
 169 #endif
 170
 171 #if defined(__i386__) || defined(__x86_64__)
 172 bool
 173 pmap_clear_attrs(struct vm_page *pg, unsigned what)
 174 {
 175
 176         return false;
 177 }
 178
 179 void
 180 pmap_page_remove(struct vm_page *pg)
 181 {
 182
 183 }
 184
 185 bool
 186 pmap_test_attrs(struct vm_page *pg, unsigned what)
 187 {
 188
 189         return true;
 190 }
 191
 192 paddr_t
 193 vtophys(vaddr_t va)
 194 {
 195
 196         return va;
 197 }
 198 #endif
 199
 200 #ifdef __vax__
 201 /*
 202  * XXX: this won't work on vax.  But I'm not terribly
 203  * uberinterested in that for the time being.
 204  */
 205 struct pv_entry *pv_table;
 206 bool
 207 pmap_clear_modify_long(struct pv_entry *pv)
 208 {
 209
 210         return true;
 211 }
 212
 213 bool
 214 pmap_clear_reference_long(struct pv_entry *pv)
 215 {
 216
 217         return true;
 218 }
 219
 220 bool
 221 pmap_is_modified_long(struct pv_entry *pv)
 222 {
 223
 224         return true;
 225 }
 226
 227 void
 228 pmap_page_protect_long(struct pv_entry *pv, vm_prot_t prot)
 229 {
 230
 231 }
 232
 233 void
 234 pmap_protect_long(pmap_t pmap, vaddr_t va1, vaddr_t va2, vm_prot_t prot)
 235 {
 236
 237 }
 238
 239 struct  pte *Sysmap;
 240 #endif
 241
 242 #ifdef PPC_OEA
 243 bool
 244 pmap_clear_bit(struct vm_page *pg, int ptebit)
 245 {
 246
 247         return true;
 248 }
 249
 250 bool
 251 pmap_query_bit(struct vm_page *pg, int ptebit)
 252 {
 253
 254         return true;
 255 }
 256 #endif
 257
 258 #if defined(__sparc__) && !defined(__sparc_v9__)
 259 bool (*pmap_clear_modify_p)(struct vm_page *) = pmap_clear_modify;
 260 bool (*pmap_is_modified_p)(struct vm_page *) = pmap_is_modified;
 261 void (*pmap_kenter_pa_p)(vaddr_t, paddr_t, vm_prot_t, u_int) = pmap_kenter_pa;
 262 void (*pmap_kremove_p)(vaddr_t, vsize_t) = pmap_kremove;
 263 void (*pmap_page_protect_p)(struct vm_page *, vm_prot_t) = pmap_page_protect;
 264 bool (*pmap_extract_p)(pmap_t, vaddr_t, paddr_t *) = pmap_extract;
 265 int (*pmap_enter_p)(pmap_t, vaddr_t, paddr_t, vm_prot_t, u_int) = pmap_enter;
 266 #endif