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  1. /*
  2.  * Copyright (C) 2006 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.  /** @addtogroup ppc64interrupt
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <interrupt.h>
  36. #include <arch/interrupt.h>
  37. #include <arch/types.h>
  38. #include <arch.h>
  39. #include <time/clock.h>
  40. #include <ipc/sysipc.h>
  41.  
  42.  
  43. void start_decrementer(void)
  44. {
  45.     asm volatile (
  46.         "mtdec %0\n"
  47.         :
  48.         : "r" (1000)
  49.     );
  50. }
  51.  
  52.  
  53. static void exception_decrementer(int n, istate_t *istate)
  54. {
  55.     clock();
  56.     start_decrementer();
  57. }
  58.  
  59.  
  60. /* Initialize basic tables for exception dispatching */
  61. void interrupt_init(void)
  62. {
  63.     exc_register(VECTOR_DECREMENTER, "timer", exception_decrementer);
  64. }
  65.  
  66.  
  67. /* Reregister irq to be IPC-ready */
  68. void irq_ipc_bind_arch(unative_t irq)
  69. {
  70.     panic("not implemented\n");
  71.     /* TODO */
  72. }
  73.  
  74.  /** @}
  75.  */
  76.  
  77.