/[gxemul]/trunk/src/devices/dev_mc146818.c
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Diff of /trunk/src/devices/dev_mc146818.c

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revision 20 by dpavlin, Mon Oct 8 16:19:23 2007 UTC revision 24 by dpavlin, Mon Oct 8 16:19:56 2007 UTC
# Line 1  Line 1 
1  /*  /*
2   *  Copyright (C) 2003-2005  Anders Gavare.  All rights reserved.   *  Copyright (C) 2003-2006  Anders Gavare.  All rights reserved.
3   *   *
4   *  Redistribution and use in source and binary forms, with or without   *  Redistribution and use in source and binary forms, with or without
5   *  modification, are permitted provided that the following conditions are met:   *  modification, are permitted provided that the following conditions are met:
# Line 25  Line 25 
25   *  SUCH DAMAGE.   *  SUCH DAMAGE.
26   *     *  
27   *   *
28   *  $Id: dev_mc146818.c,v 1.80 2005/11/20 11:28:45 debug Exp $   *  $Id: dev_mc146818.c,v 1.86 2006/06/22 13:22:41 debug Exp $
29   *     *  
30   *  MC146818 real-time clock, used by many different machines types.   *  MC146818 real-time clock, used by many different machines types.
31   *  (DS1687 as used in some other machines is also similar to the MC146818.)   *  (DS1687 as used in some other machines is also similar to the MC146818.)
# Line 137  static void recalc_interrupt_cycle(struc Line 137  static void recalc_interrupt_cycle(struc
137  #endif  #endif
138    
139          if (d->interrupt_hz > 0)          if (d->interrupt_hz > 0)
140                  d->interrupt_every_x_cycles =                  d->interrupt_every_x_cycles = emulated_hz / d->interrupt_hz;
                     emulated_hz / d->interrupt_hz;  
141          else          else
142                  d->interrupt_every_x_cycles = 0;                  d->interrupt_every_x_cycles = 0;
143  }  }
# Line 160  void dev_mc146818_tick(struct cpu *cpu, Line 159  void dev_mc146818_tick(struct cpu *cpu,
159                  if (d->cycles_left_until_interrupt < 0 ||                  if (d->cycles_left_until_interrupt < 0 ||
160                      d->cycles_left_until_interrupt >=                      d->cycles_left_until_interrupt >=
161                      d->interrupt_every_x_cycles) {                      d->interrupt_every_x_cycles) {
162                          /*  debug("[ rtc interrupt (every %i cycles) ]\n",                          /*  fatal("[ rtc interrupt (every %i cycles) ]\n",
163                              d->interrupt_every_x_cycles);  */                              d->interrupt_every_x_cycles);  */
164                          cpu_interrupt(cpu, d->irq_nr);                          cpu_interrupt(cpu, d->irq_nr);
165    
# Line 319  int dev_mc146818_access(struct cpu *cpu, Line 318  int dev_mc146818_access(struct cpu *cpu,
318          struct tm *tmp;          struct tm *tmp;
319          time_t timet;          time_t timet;
320          struct mc_data *d = extra;          struct mc_data *d = extra;
321          int i, relative_addr = r;          int relative_addr = r;
322            size_t i;
323    
324          relative_addr /= d->addrdiv;          relative_addr /= d->addrdiv;
325    
# Line 506  int dev_mc146818_access(struct cpu *cpu, Line 506  int dev_mc146818_access(struct cpu *cpu,
506                  case 0x128:                  case 0x128:
507                          d->reg[relative_addr] = data[0];                          d->reg[relative_addr] = data[0];
508                          if (data[0] & 8) {                          if (data[0] & 8) {
509                                    int j;
510    
511                                  /*  Used on SGI to power off the machine.  */                                  /*  Used on SGI to power off the machine.  */
512                                  fatal("[ md146818: power off ]\n");                                  fatal("[ md146818: power off ]\n");
513                                  for (i=0; i<cpu->machine->ncpus; i++)                                  for (j=0; j<cpu->machine->ncpus; j++)
514                                          cpu->machine->cpus[i]->running = 0;                                          cpu->machine->cpus[j]->running = 0;
515                                  cpu->machine->                                  cpu->machine->
516                                      exit_without_entering_debugger = 1;                                      exit_without_entering_debugger = 1;
517                          }                          }
# Line 639  void dev_mc146818_init(struct machine *m Line 641  void dev_mc146818_init(struct machine *m
641    
642          if (machine->machine_type != MACHINE_PREP) {          if (machine->machine_type != MACHINE_PREP) {
643                  /*  NetBSD/prep has a really ugly clock detection code;                  /*  NetBSD/prep has a really ugly clock detection code;
644                      all other machines/OSes don't need this.  */                      no other machines/OSes don't need this.  */
645                  d->ugly_netbsd_prep_hack_done = NETBSD_HACK_DONE;                  d->ugly_netbsd_prep_hack_done = NETBSD_HACK_DONE;
646          }          }
647    
# Line 690  void dev_mc146818_init(struct machine *m Line 692  void dev_mc146818_init(struct machine *m
692           *  TODO:  Find out if this messes up Sprite emulation; if so, then           *  TODO:  Find out if this messes up Sprite emulation; if so, then
693           *         this hack has to be removed.           *         this hack has to be removed.
694           */           */
695          d->uip_threshold = 5;          d->uip_threshold = 8;
696    
697          if (access_style == MC146818_ARC_JAZZ)          if (access_style == MC146818_ARC_JAZZ)
698                  memory_device_register(mem, "mc146818_jazz", 0x90000070ULL,                  memory_device_register(mem, "mc146818_jazz", 0x90000070ULL,
# Line 712  void dev_mc146818_init(struct machine *m Line 714  void dev_mc146818_init(struct machine *m
714    
715          mc146818_update_time(d);          mc146818_update_time(d);
716    
717          machine_add_tickfunction(machine, dev_mc146818_tick, d, TICK_SHIFT);          machine_add_tickfunction(machine, dev_mc146818_tick, d,
718                TICK_SHIFT, 0.0);
719  }  }
720    
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