Subversion Repositories HelenOS

Rev

Rev 3862 | Rev 4130 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  1. /*
  2.  * Copyright (c) 2006 Jakub Jermar
  3.  * Copyright (c) 2009 Pavel Rimsky
  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. /** @addtogroup sparc64mm
  31.  * @{
  32.  */
  33. /** @file
  34.  */
  35.  
  36. #include <arch/mm/as.h>
  37. #include <arch/mm/pagesize.h>
  38. #include <arch/mm/tlb.h>
  39. #include <genarch/mm/page_ht.h>
  40. #include <genarch/mm/asid_fifo.h>
  41. #include <debug.h>
  42. #include <config.h>
  43. #include <arch/sun4v/hypercall.h>
  44.  
  45. #ifdef CONFIG_TSB
  46. #include <arch/mm/tsb.h>
  47. #include <arch/memstr.h>
  48. #include <arch/asm.h>
  49. #include <mm/frame.h>
  50. #include <bitops.h>
  51. #include <macros.h>
  52. #endif /* CONFIG_TSB */
  53.  
  54. /** Architecture dependent address space init. */
  55. void as_arch_init(void)
  56. {
  57.     if (config.cpu_active == 1) {
  58.         as_operations = &as_ht_operations;
  59.         asid_fifo_init();
  60.     }
  61. }
  62.  
  63. int as_constructor_arch(as_t *as, int flags)
  64. {
  65. #ifdef CONFIG_TSB
  66.     int order = fnzb32(
  67.         (TSB_ENTRY_COUNT * sizeof(tsb_entry_t)) >> FRAME_WIDTH);
  68.  
  69.     uintptr_t tsb = (uintptr_t) frame_alloc(order, flags | FRAME_KA);
  70.  
  71.     if (!tsb)
  72.         return -1;
  73.  
  74.     as->arch.tsb_description.page_size = PAGESIZE_8K;
  75.     as->arch.tsb_description.associativity = 1;
  76.     as->arch.tsb_description.num_ttes = TSB_ENTRY_COUNT;
  77.     as->arch.tsb_description.pgsize_mask = 1 << PAGESIZE_8K;
  78.     as->arch.tsb_description.tsb_base = tsb;
  79.     as->arch.tsb_description.reserved = 0;
  80.  
  81.     memsetb((void *) as->arch.tsb_description.tsb_base,
  82.         TSB_ENTRY_COUNT * sizeof(tsb_entry_t), 0);
  83. #endif
  84.     return 0;
  85. }
  86.  
  87. int as_destructor_arch(as_t *as)
  88. {
  89. #ifdef CONFIG_TSB
  90.     count_t cnt = (TSB_ENTRY_COUNT * sizeof(tsb_entry_t)) >> FRAME_WIDTH;
  91.     frame_free(KA2PA((uintptr_t) as->arch.tsb_description.tsb_base));
  92.     return cnt;
  93. #else
  94.     return 0;
  95. #endif
  96. }
  97.  
  98. int as_create_arch(as_t *as, int flags)
  99. {
  100. #ifdef CONFIG_TSB
  101.     tsb_invalidate(as, 0, (count_t) -1);
  102.     as->arch.tsb_description.context = as->asid;
  103. #endif
  104.     return 0;
  105. }
  106.  
  107. /** Perform sparc64-specific tasks when an address space becomes active on the
  108.  * processor.
  109.  *
  110.  * Install ASID and map TSBs.
  111.  *
  112.  * @param as Address space.
  113.  */
  114. void as_install_arch(as_t *as)
  115. {
  116.     mmu_secondary_context_write(as->asid);
  117.  
  118. #ifdef CONFIG_TSB  
  119.     uintptr_t base = ALIGN_DOWN(config.base, 1 << KERNEL_PAGE_WIDTH);
  120.  
  121.     ASSERT(as->arch.tsb_description.tsb_base);
  122.     uintptr_t tsb = as->arch.tsb_description.tsb_base;
  123.        
  124.     if (!overlaps(tsb, 8 * MMU_PAGE_SIZE, base, 1 << KERNEL_PAGE_WIDTH)) {
  125.         /*
  126.          * TSBs were allocated from memory not covered
  127.          * by the locked 4M kernel DTLB entry. We need
  128.          * to map both TSBs explicitly.
  129.          */
  130.         mmu_demap_page(tsb, 0, MMU_FLAG_DTLB);
  131.         mmu_map_perm_addr(
  132.             tsb, KA2PA(tsb), true, true, false, true,
  133.             PAGESIZE_64K, MMU_FLAG_DTLB);
  134.     }
  135.  
  136.     __hypercall_fast2(MMU_TSB_CTX0, 1, as->arch.tsb_description.tsb_base);
  137.    
  138. #endif
  139. }
  140.  
  141. /** Perform sparc64-specific tasks when an address space is removed from the
  142.  * processor.
  143.  *
  144.  * Demap TSBs.
  145.  *
  146.  * @param as Address space.
  147.  */
  148. void as_deinstall_arch(as_t *as)
  149. {
  150.     /*
  151.      * Note that we don't and may not lock the address space. That's ok
  152.      * since we only read members that are currently read-only.
  153.      *
  154.      * Moreover, the as->asid is protected by asidlock, which is being held.
  155.      */
  156. #ifdef CONFIG_TSB
  157.     uintptr_t base = ALIGN_DOWN(config.base, 1 << KERNEL_PAGE_WIDTH);
  158.  
  159.     ASSERT(as->arch.tsb_description.tsb_base);
  160.  
  161.     uintptr_t tsb = as->arch.tsb_description.tsb_base;
  162.        
  163.     if (!overlaps(tsb, 8 * MMU_PAGE_SIZE, base, 1 << KERNEL_PAGE_WIDTH)) {
  164.         /*
  165.          * TSBs were allocated from memory not covered
  166.          * by the locked 4M kernel DTLB entry. We need
  167.          * to demap the entry installed by as_install_arch().
  168.          */
  169.         mmu_demap_page(tsb, 0, MMU_FLAG_DTLB);
  170.     }
  171. #endif
  172. }
  173.  
  174. /** @}
  175.  */
  176.