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  1. /*
  2.  * Copyright (c) 2006 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. /** @addtogroup ppc32mm
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <arch/mm/as.h>
  36. #include <genarch/mm/as_pt.h>
  37. #include <genarch/mm/asid_fifo.h>
  38. #include <arch.h>
  39.  
  40. /** Architecture dependent address space init. */
  41. void as_arch_init(void)
  42. {
  43.     as_operations = &as_pt_operations;
  44.     asid_fifo_init();
  45. }
  46.  
  47. /** Install address space.
  48.  *
  49.  * Install ASID.
  50.  *
  51.  * @param as Address space structure.
  52.  *
  53.  */
  54. void as_install_arch(as_t *as)
  55. {
  56.     asid_t asid;
  57.     ipl_t ipl;
  58.     uint32_t sr;
  59.  
  60.     ipl = interrupts_disable();
  61.     spinlock_lock(&as->lock);
  62.    
  63.     asid = as->asid;
  64.    
  65.     /* Lower 2 GB, user and supervisor access */
  66.     for (sr = 0; sr < 8; sr++) {
  67.         asm volatile (
  68.             "mtsrin %0, %1\n"
  69.             :
  70.             : "r" ((0x6000 << 16) + (asid << 4) + sr), "r" (sr << 28)
  71.         );
  72.     }
  73.    
  74.     /* Upper 2 GB, only supervisor access */
  75.     for (sr = 8; sr < 16; sr++) {
  76.         asm volatile (
  77.             "mtsrin %0, %1\n"
  78.             :
  79.             : "r" ((0x4000 << 16) + (asid << 4) + sr), "r" (sr << 28)
  80.         );
  81.     }
  82.    
  83.     spinlock_unlock(&as->lock);
  84.     interrupts_restore(ipl);
  85. }
  86.  
  87. /** @}
  88.  */
  89.