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  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/tlb.h>
  30. #include <mm/tlb.h>
  31. #include <print.h>
  32. #include <arch/types.h>
  33. #include <typedefs.h>
  34.  
  35. void tlb_arch_init(void)
  36. {
  37. }
  38.  
  39. /** Print contents of both TLBs. */
  40. void tlb_print(void)
  41. {
  42.     int i;
  43.     tlb_data_t d;
  44.     tlb_tag_read_reg_t t;
  45.    
  46.     printf("I-TLB contents:\n");
  47.     for (i = 0; i < ITLB_ENTRY_COUNT; i++) {
  48.         d.value = itlb_data_access_read(i);
  49.         t.value = itlb_tag_read_read(i);
  50.        
  51.         printf("%d: vpn=%Q, context=%d, v=%d, size=%d, nfo=%d, ie=%d, soft2=%X, diag=%X, pfn=%X, soft=%X, l=%d, cp=%d, cv=%d, e=%d, p=%d, w=%d, g=%d\n",
  52.             i, t.vpn, t.context, d.v, d.size, d.nfo, d.ie, d.soft2, d.diag, d.pfn, d.soft, d.l, d.cp, d.cv, d.e, d.p, d.w, d.g);
  53.     }
  54.  
  55.     printf("D-TLB contents:\n");
  56.     for (i = 0; i < DTLB_ENTRY_COUNT; i++) {
  57.         d.value = dtlb_data_access_read(i);
  58.         t.value = dtlb_tag_read_read(i);
  59.        
  60.         printf("%d: vpn=%Q, context=%d, v=%d, size=%d, nfo=%d, ie=%d, soft2=%X, diag=%X, pfn=%X, soft=%X, l=%d, cp=%d, cv=%d, e=%d, p=%d, w=%d, g=%d\n",
  61.             i, t.vpn, t.context, d.v, d.size, d.nfo, d.ie, d.soft2, d.diag, d.pfn, d.soft, d.l, d.cp, d.cv, d.e, d.p, d.w, d.g);
  62.     }
  63.  
  64. }
  65.  
  66. /** Invalidate all unlocked ITLB and DTLB entries. */
  67. void tlb_invalidate_all(void)
  68. {
  69.     int i;
  70.     tlb_data_t d;
  71.     tlb_tag_read_reg_t t;
  72.  
  73.     for (i = 0; i < ITLB_ENTRY_COUNT; i++) {
  74.         d.value = itlb_data_access_read(i);
  75.         if (!d.l) {
  76.             printf("invalidating ");
  77.             t.value = itlb_tag_read_read(i);
  78.             d.v = false;
  79.             itlb_tag_access_write(t.value);
  80.             itlb_data_access_write(i, d.value);
  81.         }
  82.     }
  83.    
  84.     for (i = 0; i < DTLB_ENTRY_COUNT; i++) {
  85.         d.value = dtlb_data_access_read(i);
  86.         if (!d.l) {
  87.             t.value = dtlb_tag_read_read(i);
  88.             d.v = false;
  89.             dtlb_tag_access_write(t.value);
  90.             dtlb_data_access_write(i, d.value);
  91.         }
  92.     }
  93.    
  94. }
  95.  
  96. /** Invalidate all ITLB and DTLB entries that belong to specified ASID (Context).
  97.  *
  98.  * @param asid Address Space ID.
  99.  */
  100. void tlb_invalidate_asid(asid_t asid)
  101. {
  102.     /* TODO: write asid to some Context register and encode the register in second parameter below. */
  103.     itlb_demap(TLB_DEMAP_CONTEXT, TLB_DEMAP_NUCLEUS, 0);
  104.     dtlb_demap(TLB_DEMAP_CONTEXT, TLB_DEMAP_NUCLEUS, 0);
  105. }
  106.  
  107. /** Invalidate all ITLB and DLTB entries for specified page in specified address space.
  108.  *
  109.  * @param asid Address Space ID.
  110.  * @param page Page which to sweep out from ITLB and DTLB.
  111.  */
  112. void tlb_invalidate_page(asid_t asid, __address page)
  113. {
  114.     /* TODO: write asid to some Context register and encode the register in second parameter below. */
  115.     itlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, page);
  116.     dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, page);
  117. }
  118.