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  1. /*
  2.  * Copyright (C) 2005 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 __ia64_ASM_H__
  30. #define __ia64_ASM_H__
  31.  
  32. #include <arch/types.h>
  33. #include <config.h>
  34.  
  35. /** Return base address of current stack
  36.  *
  37.  * Return the base address of the current stack.
  38.  * The stack is assumed to be STACK_SIZE long.
  39.  * The stack must start on page boundary.
  40.  */
  41. static inline __address get_stack_base(void)
  42. {
  43.     __u64 v;
  44.  
  45.     __asm__ volatile ("and %0 = %1, r12" : "=r" (v) : "r" (~(STACK_SIZE-1)));
  46.    
  47.     return v;
  48. }
  49.  
  50. /** Read IVR (External Interrupt Vector Register)
  51.  *
  52.  * @return Highest priority, pending, unmasked external interrupt vector.
  53.  */
  54. static inline __u8 read_ivr(void)
  55. {
  56.     __u64 v;
  57.    
  58.     __asm__ volatile ("mov %0 = cr65\n" : "=r" (v));
  59.    
  60.     return (__u8) (v & 0xf);
  61. }
  62.  
  63.  
  64. void cpu_sleep(void);
  65.  
  66. void asm_delay_loop(__u32 t);
  67.  
  68.  
  69. #define set_shadow_register(reg,val) {__u64 v = val; __asm__  volatile("mov r15 = %0;;\n""bsw.0;;\n""mov "   #reg   " = r15;;\n""bsw.1;;\n" : : "r" (v) : "r15" ); }
  70. #define get_shadow_register(reg,val) {__u64 v ; __asm__  volatile("bsw.0;;\n" "mov r15 = r" #reg ";;\n" "bsw.1;;\n" "mov %0 = r15;;\n" : "=r" (v) : : "r15" ); val=v; }
  71.  
  72. #define get_control_register(reg,val) {__u64 v ; __asm__  volatile("mov r15 = cr" #reg ";;\n" "mov %0 = r15;;\n" : "=r" (v) : : "r15" ); val=v; }
  73. #define get_aplication_register(reg,val) {__u64 v ; __asm__  volatile("mov r15 = ar" #reg ";;\n" "mov %0 = r15;;\n" : "=r" (v) : : "r15" ); val=v; }
  74. #define get_psr(val) {__u64 v ; __asm__  volatile("mov r15 = psr;;\n" "mov %0 = r15;;\n" : "=r" (v) : : "r15" ); val=v; }
  75.  
  76.  
  77. void cpu_halt(void);
  78.  
  79.  
  80.  
  81.  
  82. #endif
  83.