libogc/decrementer.c

   1 /*-------------------------------------------------------------
   2
   3 decrementer.c -- PPC decrementer exception support
   4
   5 Copyright (C) 2004
   6 Michael Wiedenbauer (shagkur)
   7 Dave Murphy (WinterMute)
   8
   9 This software is provided 'as-is', without any express or implied
  10 warranty.  In no event will the authors be held liable for any
  11 damages arising from the use of this software.
  12
  13 Permission is granted to anyone to use this software for any
  14 purpose, including commercial applications, and to alter it and
  15 redistribute it freely, subject to the following restrictions:
  16
  17 1.      The origin of this software must not be misrepresented; you
  18 must not claim that you wrote the original software. If you use
  19 this software in a product, an acknowledgment in the product
  20 documentation would be appreciated but is not required.
  21
  22 2.      Altered source versions must be plainly marked as such, and
  23 must not be misrepresented as being the original software.
  24
  25 3.      This notice may not be removed or altered from any source
  26 distribution.
  27
  28
  29 -------------------------------------------------------------*/
  30
  31
  32 #include <gctypes.h>
  33 #include <stdlib.h>
  34 #include "asm.h"
  35 #include "processor.h"
  36 #include "lwp_threads.h"
  37 #include "lwp_watchdog.h"
  38 #include "context.h"
  39
  40 //#define _DECEX_DEBUG
  41
  42 #ifdef _DECEX_DEBUG
  43 extern int printk(const char *fmt,...);
  44 #endif
  45
  46 void __decrementer_init()
  47 {
  48 #ifdef _DECEX_DEBUG
  49         printf("__decrementer_init()\n\n");
  50 #endif
  51 }
  52
  53 void c_decrementer_handler(frame_context *ctx)
  54 {
  55 #ifdef _DECEX_DEBUG
  56         printk("c_decrementer_handler(%d)\n",_wd_ticks_since_boot);
  57 #endif
  58         __lwp_wd_tickle_ticks();
  59 }