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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/slab.h>
  38. #include <arch/trap/regwin.h>
  39. #include <align.h>
  40.  
  41. void thr_constructor_arch(thread_t *t)
  42. {
  43.     /*
  44.      * Allocate memory for uspace_window_buffer.
  45.      */
  46.     t->arch.uspace_window_buffer = NULL;
  47. }
  48.  
  49. void thr_destructor_arch(thread_t *t)
  50. {
  51.     if (t->arch.uspace_window_buffer) {
  52.         uintptr_t uw_buf = (uintptr_t) t->arch.uspace_window_buffer;
  53.         /*
  54.          * Mind the possible alignment of the userspace window buffer
  55.          * belonging to a killed thread.
  56.          */
  57.         free((uint8_t *) ALIGN_DOWN(uw_buf, UWB_ALIGNMENT));
  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.         /*
  66.          * The thread needs userspace window buffer and the object
  67.          * returned from the slab allocator doesn't have any.
  68.          */
  69.         t->arch.uspace_window_buffer = malloc(UWB_ASIZE, 0);
  70.     } else {
  71.         uintptr_t uw_buf = (uintptr_t) t->arch.uspace_window_buffer;
  72.  
  73.         /*
  74.          * Mind the possible alignment of the userspace window buffer
  75.          * belonging to a killed thread.
  76.          */
  77.         t->arch.uspace_window_buffer = (uint8_t *) ALIGN_DOWN(uw_buf,
  78.             UWB_ASIZE);
  79.     }
  80. }
  81.  
  82. /** @}
  83.  */
  84.