Subversion Repositories HelenOS-historic

Rev

Rev 595 | Rev 727 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  1. /*
  2.  * Copyright (C) 2005 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #include <arch/mm/as.h>
  30. #include <arch/mm/tlb.h>
  31. #include <mm/tlb.h>
  32. #include <mm/as.h>
  33. #include <arch/cp0.h>
  34. #include <arch.h>
  35.  
  36. /** Install address space.
  37.  *
  38.  * Install ASID and if necessary, purge TLB.
  39.  *
  40.  * @param as Address space structure.
  41.  */
  42. void as_install_arch(as_t *as)
  43. {
  44.     entry_hi_t hi;
  45.     ipl_t ipl;
  46.  
  47.     /*
  48.      * If necessary, purge TLB.
  49.      */
  50.     tlb_invalidate_asid(as->asid);  /* TODO: do it only if necessary */
  51.  
  52.     /*
  53.      * Install ASID.
  54.      */
  55.     hi.value = cp0_entry_hi_read();
  56.  
  57.     ipl = interrupts_disable();
  58.     spinlock_lock(&as->lock);
  59.     hi.asid = as->asid;
  60.     cp0_entry_hi_write(hi.value);  
  61.     spinlock_unlock(&as->lock);
  62.     interrupts_restore(ipl);
  63. }
  64.