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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. #include <arch/mm/page.h>
  30. #include <arch/types.h>
  31. #include <genarch/mm/page_ht.h>
  32. #include <mm/page.h>
  33. #include <config.h>
  34. #include <panic.h>
  35.  
  36. __u64 thash(__u64 va);
  37. __u64 thash(__u64 va)
  38. {
  39.     __u64 ret;
  40.     asm
  41.     (
  42.         "thash %0=%1;;"
  43.         :"=r"(ret)
  44.         :"r" (va)
  45.     );
  46.    
  47.     return ret;
  48. }
  49.  
  50. __u64 ttag(__u64 va);
  51. __u64 ttag(__u64 va)
  52. {
  53.     __u64 ret;
  54.     asm
  55.     (
  56.         "ttag %0=%1;;"
  57.         :"=r"(ret)
  58.         :"r" (va)
  59.     );
  60.    
  61.     return ret;
  62. }
  63.  
  64.  
  65. static void set_VHPT_environment(void)
  66. {
  67.     return;
  68.  
  69.     /*
  70.     TODO:
  71.     */
  72.    
  73.     int i;
  74.    
  75.     /* First set up REGION REGISTER 0 */
  76.    
  77.     region_register rr;
  78.     rr.map.ve=0;                  /*Disable Walker*/
  79.     rr.map.ps=PAGE_WIDTH;
  80.     rr.map.rid=REGION_RID_MAIN;
  81.    
  82.     asm
  83.     (
  84.         "mov rr[r0]=%0;;"
  85.         :
  86.         :"r"(rr.word)
  87.     );
  88.        
  89.     /* And Invalidate the rest of REGION REGISTERS */
  90.    
  91.     for(i=1;i<REGION_REGISTERS;i++)
  92.     {
  93.         rr.map.rid=REGION_RID_FIRST_INVALID+i-1;
  94.         asm
  95.         (
  96.             "mov r8=%1;;"
  97.             "mov rr[r8]=%0;;"
  98.             :
  99.             :"r"(rr.word),"r"(i)
  100.             :"r8"
  101.         );
  102.     };
  103.  
  104.     PTA_register pta;
  105.     pta.map.ve=0;                   /*Disable Walker*/
  106.     pta.map.vf=1;                   /*Large entry format*/
  107.     pta.map.size=VHPT_WIDTH;
  108.     pta.map.base=VHPT_BASE;
  109.    
  110.    
  111.     /*Write PTA*/
  112.     asm
  113.     (
  114.         "mov cr8=%0;;"
  115.         :
  116.         :"r"(pta.word)
  117.     ); 
  118.    
  119. }  
  120.  
  121.  
  122. void page_arch_init(void)
  123. {
  124.     page_operations = &page_ht_operations;
  125.     set_VHPT_environment();
  126. }
  127.