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  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. /* SUN4V-OK */
  37.  
  38. #include <arch/mm/as.h>
  39. #include <arch/mm/pagesize.h>
  40. #include <arch/mm/tlb.h>
  41. #include <genarch/mm/page_ht.h>
  42. #include <genarch/mm/asid_fifo.h>
  43. #include <debug.h>
  44. #include <config.h>
  45. #include <arch/sun4v/hypercall.h>
  46.  
  47. #ifdef CONFIG_TSB
  48. #include <arch/mm/tsb.h>
  49. #include <arch/memstr.h>
  50. #include <arch/asm.h>
  51. #include <mm/frame.h>
  52. #include <bitops.h>
  53. #include <macros.h>
  54. #endif /* CONFIG_TSB */
  55.  
  56. /** Architecture dependent address space init. */
  57. void as_arch_init(void)
  58. {
  59.     if (config.cpu_active == 1) {
  60.         as_operations = &as_ht_operations;
  61.         asid_fifo_init();
  62.     }
  63. }
  64.  
  65. int as_constructor_arch(as_t *as, int flags)
  66. {
  67. #ifdef CONFIG_TSB
  68.     int order = fnzb32(
  69.         (TSB_ENTRY_COUNT * sizeof(tsb_entry_t)) >> FRAME_WIDTH);
  70.  
  71.     uintptr_t tsb = (uintptr_t) frame_alloc(order, flags | FRAME_KA);
  72.  
  73.     if (!tsb)
  74.         return -1;
  75.  
  76.     as->arch.tsb_description.page_size = PAGESIZE_8K;
  77.     as->arch.tsb_description.associativity = 1;
  78.     as->arch.tsb_description.num_ttes = TSB_ENTRY_COUNT;
  79.     as->arch.tsb_description.pgsize_mask = 1 << PAGESIZE_8K;
  80.     as->arch.tsb_description.tsb_base = tsb;
  81.     as->arch.tsb_description.reserved = 0;
  82.  
  83.     memsetb((void *) as->arch.tsb_description.tsb_base,
  84.         TSB_ENTRY_COUNT * sizeof(tsb_entry_t), 0);
  85. #endif
  86.     return 0;
  87. }
  88.  
  89. int as_destructor_arch(as_t *as)
  90. {
  91. #ifdef CONFIG_TSB
  92.     count_t cnt = (TSB_ENTRY_COUNT * sizeof(tsb_entry_t)) >> FRAME_WIDTH;
  93.     frame_free(KA2PA((uintptr_t) as->arch.tsb_description.tsb_base));
  94.     return cnt;
  95. #else
  96.     return 0;
  97. #endif
  98. }
  99.  
  100. int as_create_arch(as_t *as, int flags)
  101. {
  102. #ifdef CONFIG_TSB
  103.     tsb_invalidate(as, 0, (count_t) -1);
  104.     as->arch.tsb_description.context = as->asid;
  105. #endif
  106.     return 0;
  107. }
  108.  
  109. /** Perform sparc64-specific tasks when an address space becomes active on the
  110.  * processor.
  111.  *
  112.  * Install ASID and map TSBs.
  113.  *
  114.  * @param as Address space.
  115.  */
  116. void as_install_arch(as_t *as)
  117. {
  118.     mmu_secondary_context_write(as->asid);
  119.  
  120. #ifdef CONFIG_TSB  
  121.     uintptr_t base = ALIGN_DOWN(config.base, 1 << KERNEL_PAGE_WIDTH);
  122.  
  123.     ASSERT(as->arch.tsb_description.tsb_base);
  124.     uintptr_t tsb = as->arch.tsb_description.tsb_base;
  125.        
  126.     if (!overlaps(tsb, 8 * MMU_PAGE_SIZE, base, 1 << KERNEL_PAGE_WIDTH)) {
  127.         /*
  128.          * TSBs were allocated from memory not covered
  129.          * by the locked 4M kernel DTLB entry. We need
  130.          * to map both TSBs explicitly.
  131.          */
  132.         mmu_demap_page(tsb, 0, MMU_FLAG_DTLB);
  133.         mmu_map_perm_addr(
  134.             tsb, KA2PA(tsb), true, true, false, true,
  135.             PAGESIZE_64K, MMU_FLAG_DTLB);
  136.     }
  137.  
  138.     __hypercall_fast2(MMU_TSB_CTX0, 1, as->arch.tsb_description.tsb_base);
  139.    
  140. #endif
  141. }
  142.  
  143. /** Perform sparc64-specific tasks when an address space is removed from the
  144.  * processor.
  145.  *
  146.  * Demap TSBs.
  147.  *
  148.  * @param as Address space.
  149.  */
  150. void as_deinstall_arch(as_t *as)
  151. {
  152.     /*
  153.      * Note that we don't and may not lock the address space. That's ok
  154.      * since we only read members that are currently read-only.
  155.      *
  156.      * Moreover, the as->asid is protected by asidlock, which is being held.
  157.      */
  158. #ifdef CONFIG_TSB
  159.     uintptr_t base = ALIGN_DOWN(config.base, 1 << KERNEL_PAGE_WIDTH);
  160.  
  161.     ASSERT(as->arch.tsb_description.tsb_base);
  162.  
  163.     uintptr_t tsb = as->arch.tsb_description.tsb_base;
  164.        
  165.     if (!overlaps(tsb, 8 * MMU_PAGE_SIZE, base, 1 << KERNEL_PAGE_WIDTH)) {
  166.         /*
  167.          * TSBs were allocated from memory not covered
  168.          * by the locked 4M kernel DTLB entry. We need
  169.          * to demap the entry installed by as_install_arch().
  170.          */
  171.         mmu_demap_page(tsb, 0, MMU_FLAG_DTLB);
  172.     }
  173. #endif
  174. }
  175.  
  176. /** @}
  177.  */
  178.