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  1. /*
  2. * Copyright (C) 2006 Jakub Vana
  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.  
  30. #include <arch/mm/vhpt.h>
  31. #include <mm/frame.h>
  32. #include <print.h>
  33.  
  34.  
  35. static vhpt_entry_t* vhpt_base;
  36.  
  37. __address vhpt_set_up(void)
  38. {
  39.     vhpt_base=(vhpt_entry_t*) PA2KA(PFN2ADDR(frame_alloc(VHPT_WIDTH-FRAME_WIDTH,FRAME_KA)));
  40.     if(!vhpt_base) panic("Kernel configured with VHPT but no memory for table.");
  41.     vhpt_invalidate_all();
  42.     return (__address) vhpt_base;
  43. }
  44.  
  45.  
  46. void vhpt_mapping_insert(__address va, asid_t asid, tlb_entry_t entry)
  47. {
  48.     region_register rr_save, rr;
  49.     index_t vrn;
  50.     rid_t rid;
  51.     __u64 tag;
  52.  
  53.     vhpt_entry_t *ventry;
  54.  
  55.  
  56.     vrn = va >> VRN_SHIFT;
  57.     rid = ASID2RID(asid, vrn);
  58.                                                                                                                
  59.   rr_save.word = rr_read(vrn);
  60.   rr.word = rr_save.word;
  61.   rr.map.rid = rid;
  62.   rr_write(vrn, rr.word);
  63.   srlz_i();
  64.    
  65.     ventry = (vhpt_entry_t *) thash(va);
  66.   tag = ttag(va);
  67.   rr_write(vrn, rr_save.word);
  68.   srlz_i();
  69.   srlz_d();
  70.  
  71.     ventry->word[0]=entry.word[0];
  72.     ventry->word[1]=entry.word[1];
  73.     ventry->present.tag.tag_word = tag;
  74.    
  75.  
  76. }
  77.  
  78. void vhpt_invalidate_all()
  79. {
  80.     memsetb((__address)vhpt_base,1<<VHPT_WIDTH,0);
  81. }
  82.  
  83. void vhpt_invalidate_asid(asid_t asid)
  84. {
  85.     vhpt_invalidate_all();
  86. }
  87.  
  88.  
  89.