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  1. /*
  2.  * Copyright (C) 2006 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. /** @addtogroup sparc64proc
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <proc/thread.h>
  36. #include <arch/proc/thread.h>
  37. #include <mm/frame.h>
  38. #include <mm/page.h>
  39. #include <arch/mm/page.h>
  40. #include <align.h>
  41.  
  42. void thr_constructor_arch(thread_t *t)
  43. {
  44.     /*
  45.      * Allocate memory for uspace_window_buffer.
  46.      */
  47.     t->arch.uspace_window_buffer = NULL;
  48. }
  49.  
  50. void thr_destructor_arch(thread_t *t)
  51. {
  52.     if (t->arch.uspace_window_buffer) {
  53.         /*
  54.          * Mind the possible alignment of the userspace window buffer
  55.          * belonging to a killed thread.
  56.          */
  57.         frame_free(KA2PA(ALIGN_DOWN((uintptr_t) t->arch.uspace_window_buffer, PAGE_SIZE)));
  58.     }
  59. }
  60.  
  61. void thread_create_arch(thread_t *t)
  62. {
  63.     if ((t->flags & THREAD_FLAG_USPACE) && (!t->arch.uspace_window_buffer)) {
  64.         /*
  65.          * The thread needs userspace window buffer and the object
  66.          * returned from the slab allocator doesn't have any.
  67.          */
  68.         t->arch.uspace_window_buffer = frame_alloc(ONE_FRAME, FRAME_KA);
  69.     } else {
  70.         uintptr_t uw_buf = (uintptr_t) t->arch.uspace_window_buffer;
  71.  
  72.         /*
  73.          * Mind the possible alignment of the userspace window buffer
  74.          * belonging to a killed thread.
  75.          */
  76.          t->arch.uspace_window_buffer = (uint8_t *) ALIGN_DOWN(uw_buf, PAGE_SIZE);
  77.     }
  78. }
  79.  
  80. /** @}
  81.  */
  82.