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  1. /*
  2.  * Copyright (C) 2006 Jakub Jermar
  3.  * Copyright (C) 2006 Jakub Vana
  4.  * All rights reserved.
  5.  *
  6.  * Redistribution and use in source and binary forms, with or without
  7.  * modification, are permitted provided that the following conditions
  8.  * are met:
  9.  *
  10.  * - Redistributions of source code must retain the above copyright
  11.  *   notice, this list of conditions and the following disclaimer.
  12.  * - Redistributions in binary form must reproduce the above copyright
  13.  *   notice, this list of conditions and the following disclaimer in the
  14.  *   documentation and/or other materials provided with the distribution.
  15.  * - The name of the author may not be used to endorse or promote products
  16.  *   derived from this software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28.  */
  29.  
  30. #include <arch/mm/page.h>
  31. #include <genarch/mm/page_ht.h>
  32. #include <mm/asid.h>
  33. #include <arch/types.h>
  34. #include <print.h>
  35. #include <mm/page.h>
  36. #include <mm/frame.h>
  37. #include <config.h>
  38. #include <panic.h>
  39. #include <arch/asm.h>
  40. #include <arch/barrier.h>
  41.  
  42. /** Initialize VHPT and region registers. */
  43. static void set_vhpt_environment(void)
  44. {
  45.     region_register rr;
  46.     pta_register pta;  
  47.     int i;
  48.    
  49.     /*
  50.      * First set up kernel region register.
  51.      */
  52.     rr.word = rr_read(VRN_KERNEL);
  53.     rr.map.ve = 0;                  /* disable VHPT walker */
  54.     rr.map.ps = PAGE_WIDTH;
  55.     rr.map.rid = ASID_KERNEL;
  56.     rr_write(VRN_KERNEL, rr.word);
  57.     srlz_i();
  58.     srlz_d();
  59.    
  60.     /*
  61.      * And invalidate the rest of region register.
  62.      */
  63.     for(i = 0; i < REGION_REGISTERS; i++) {
  64.         /* skip kernel rr */
  65.         if (i == VRN_KERNEL)
  66.             continue;
  67.    
  68.         rr.word == rr_read(i);
  69.         rr.map.rid = ASID_INVALID;
  70.         rr_write(i, rr.word);
  71.         srlz_i();
  72.         srlz_d();
  73.     }
  74.  
  75.     /*
  76.      * Allocate VHPT and invalidate all its entries.
  77.      */
  78.     page_ht = (pte_t *) frame_alloc(FRAME_KA, VHPT_WIDTH - FRAME_WIDTH, NULL);
  79.     ht_invalidate_all();
  80.    
  81.     /*
  82.      * Set up PTA register.
  83.      */
  84.     pta.word = pta_read();
  85.     pta.map.ve = 0;                   /* disable VHPT walker */
  86.     pta.map.vf = 1;                   /* large entry format */
  87.     pta.map.size = VHPT_WIDTH;
  88.     pta.map.base = (__address) page_ht;
  89.     pta_write(pta.word);
  90.     srlz_i();
  91.     srlz_d();
  92. }
  93.  
  94. /** Initialize ia64 virtual address translation subsystem. */
  95. void page_arch_init(void)
  96. {
  97.     page_operations = &page_ht_operations;
  98.     pk_disable();
  99.     set_vhpt_environment();
  100. }
  101.