usr/src/uts/i86pc/os/ppage.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <sys/t_lock.h>
  30 #include <sys/vmem.h>
  31 #include <sys/mman.h>
  32 #include <sys/vm.h>
  33 #include <sys/cpuvar.h>
  34 #include <sys/systm.h>
  35 #include <vm/as.h>
  36 #include <vm/hat.h>
  37 #include <vm/page.h>
  38 #include <vm/seg.h>
  39 #include <vm/seg_kmem.h>
  40 #include <sys/kmem.h>
  41 #include <sys/cmn_err.h>
  42 #include <sys/debug.h>
  43
  44 /*
  45  * ppcopy() and pagezero() have moved to i86/vm/vm_machdep.c
  46  */
  47
  48 /*
  49  * Architecures with a vac use this routine to quickly make
  50  * a vac-aligned mapping.  We don't have a vac, so we don't
  51  * care about that - just make this simple.
  52  */
  53 /* ARGSUSED2 */
  54 caddr_t
  55 ppmapin(page_t *pp, uint_t vprot, caddr_t avoid)
  56 {
  57         caddr_t va;
  58
  59         va = vmem_alloc(heap_arena, PAGESIZE, VM_SLEEP);
  60         hat_memload(kas.a_hat, va, pp, vprot | HAT_NOSYNC, HAT_LOAD_LOCK);
  61         return (va);
  62 }
  63
  64 void
  65 ppmapout(caddr_t va)
  66 {
  67         hat_unload(kas.a_hat, va, PAGESIZE, HAT_UNLOAD_UNLOCK);
  68         vmem_free(heap_arena, va, PAGESIZE);
  69 }
  70
  71
  72 /*
  73  * Map the page pointed to by pp into the kernel virtual address space.
  74  * This routine is used by the rootnexus.
  75  */
  76 void
  77 i86_pp_map(page_t *pp, caddr_t kaddr)
  78 {
  79         hat_devload(kas.a_hat, kaddr, MMU_PAGESIZE, page_pptonum(pp),
  80             HAT_STORECACHING_OK | PROT_READ | PROT_WRITE | HAT_NOSYNC,
  81             HAT_LOAD_LOCK);
  82 }
  83
  84 /*
  85  * Map the page containing the virtual address into the kernel virtual address
  86  * space.  This routine is used by the rootnexus.
  87  */
  88 void
  89 i86_va_map(caddr_t vaddr, struct as *asp, caddr_t kaddr)
  90 {
  91         pfn_t pfnum;
  92
  93         pfnum = hat_getpfnum(asp->a_hat, vaddr);
  94         hat_devload(kas.a_hat, kaddr, MMU_PAGESIZE, pfnum,
  95             HAT_STORECACHING_OK | PROT_READ | PROT_WRITE | HAT_NOSYNC,
  96             HAT_LOAD_LOCK);
  97 }