Subversion Repositories HelenOS-historic

Rev

Rev 173 | Go to most recent revision | Blame | Last modification | View Log | Download | RSS feed

  1. /*
  2.  * Copyright (C) 2005 Martin Decky
  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. #ifndef __ppc_ASM_H__
  30. #define __ppc_ASM_H__
  31.  
  32. #include <arch/types.h>
  33. #include <config.h>
  34.  
  35. /** Set priority level low
  36.  *
  37.  * Enable interrupts and return previous
  38.  * value of EE.
  39.  */
  40. static inline pri_t cpu_priority_low(void) {
  41.     pri_t v;
  42.     __asm__ volatile (
  43.         "\n"
  44.         : "=r" (v)
  45.     );
  46.     return v;
  47. }
  48.  
  49. /** Set priority level high
  50.  *
  51.  * Disable interrupts and return previous
  52.  * value of EE.
  53.  */
  54. static inline pri_t cpu_priority_high(void) {
  55.     pri_t v;
  56.     __asm__ volatile (
  57.         "\n"
  58.         : "=r" (v)
  59.     );
  60.     return v;
  61. }
  62.  
  63. /** Restore priority level
  64.  *
  65.  * Restore EE.
  66.  */
  67. static inline void cpu_priority_restore(pri_t pri) {
  68.     __asm__ volatile (
  69.         "\n"
  70.         : : "r" (pri)
  71.     );
  72. }
  73.  
  74. /* TODO: implement the real stuff */
  75. static inline __address get_stack_base(void)
  76. {
  77.     return NULL;
  78. }
  79.  
  80. #endif
  81.