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  1. /*
  2.  * Copyright (C) 2003-2004 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. #ifndef __mips32_ASM_H__
  30. #define __mips32_ASM_H__
  31.  
  32. #include <arch/types.h>
  33. #include <typedefs.h>
  34. #include <config.h>
  35.  
  36.  
  37. static inline void cpu_sleep(void)
  38. {
  39.     /* Most of the simulators do not support */
  40. /*  __asm__ volatile ("wait"); */
  41. }
  42.  
  43. /** Return base address of current stack
  44.  *
  45.  * Return the base address of the current stack.
  46.  * The stack is assumed to be STACK_SIZE bytes long.
  47.  * The stack must start on page boundary.
  48.  */
  49. static inline __address get_stack_base(void)
  50. {
  51.     __address v;
  52.    
  53.     __asm__ volatile ("and %0, $29, %1\n" : "=r" (v) : "r" (~(STACK_SIZE-1)));
  54.    
  55.     return v;
  56. }
  57.  
  58. extern void cpu_halt(void);
  59. extern void asm_delay_loop(__u32 t);
  60. extern void userspace_asm(__address ustack, __address uspace_uarg,
  61.               __address entry);
  62.  
  63. #endif
  64.