/[gxemul]/trunk/src/devices/dev_mc146818.c
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revision 33 by dpavlin, Mon Oct 8 16:20:58 2007 UTC revision 34 by dpavlin, Mon Oct 8 16:21:17 2007 UTC
# Line 1  Line 1 
1  /*  /*
2   *  Copyright (C) 2003-2006  Anders Gavare.  All rights reserved.   *  Copyright (C) 2003-2007  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 1.91 2006/10/07 03:20:19 debug Exp $   *  $Id: dev_mc146818.c,v 1.95 2007/02/03 16:55:55 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 76  struct mc_data { Line 76  struct mc_data {
76          int             timebase_hz;          int             timebase_hz;
77          int             interrupt_hz;          int             interrupt_hz;
78          int             old_interrupt_hz;          int             old_interrupt_hz;
79          int             irq_nr;          struct interrupt irq;
80          struct timer    *timer;          struct timer    *timer;
81          volatile int    pending_timer_interrupts;          volatile int    pending_timer_interrupts;
82    
# Line 120  DEVICE_TICK(mc146818) Line 120  DEVICE_TICK(mc146818)
120    
121          if ((d->reg[MC_REGB * 4] & MC_REGB_PIE) && pti > 0) {          if ((d->reg[MC_REGB * 4] & MC_REGB_PIE) && pti > 0) {
122                  static int warned = 0;                  static int warned = 0;
123                  if (pti > 800 && !warned) {                  if (pti > 1500 && !warned) {
124                          warned = 1;                          warned = 1;
125                          fatal("[ WARNING: MC146818 interrupts lost, "                          fatal("[ WARNING: MC146818 interrupts lost, "
126                              "host too slow? ]\n");                              "host too slow? ]\n");
# Line 139  DEVICE_TICK(mc146818) Line 139  DEVICE_TICK(mc146818)
139                  }                  }
140  #endif  #endif
141    
142                  cpu_interrupt(cpu, d->irq_nr);                  INTERRUPT_ASSERT(d->irq);
143    
144                  d->reg[MC_REGC * 4] |= MC_REGC_PF;                  d->reg[MC_REGC * 4] |= MC_REGC_PF;
145          }          }
# Line 472  int dev_mc146818_access(struct cpu *cpu, Line 472  int dev_mc146818_access(struct cpu *cpu,
472                  case MC_REGB*4:                  case MC_REGB*4:
473                          d->reg[MC_REGB*4] = data[0];                          d->reg[MC_REGB*4] = data[0];
474                          if (!(data[0] & MC_REGB_PIE)) {                          if (!(data[0] & MC_REGB_PIE)) {
475                                  cpu_interrupt_ack(cpu, d->irq_nr);                                  INTERRUPT_DEASSERT(d->irq);
476                          }                          }
477    
478                          /*  debug("[ mc146818: write to MC_REGB, data[0] "                          /*  debug("[ mc146818: write to MC_REGB, data[0] "
# Line 566  int dev_mc146818_access(struct cpu *cpu, Line 566  int dev_mc146818_access(struct cpu *cpu,
566                  data[0] = d->reg[relative_addr];                  data[0] = d->reg[relative_addr];
567    
568                  if (relative_addr == MC_REGC*4) {                  if (relative_addr == MC_REGC*4) {
569                          cpu_interrupt_ack(cpu, d->irq_nr);                          INTERRUPT_DEASSERT(d->irq);
570    
571                          /*                          /*
572                           *  Acknowledging an interrupt decreases the                           *  Acknowledging an interrupt decreases the
573                           *  number of pending "real world" timer ticks.                           *  number of pending "real world" timer ticks.
574                           */                           */
575                          if (d->reg[MC_REGC * 4] & MC_REGC_PF)                          if (d->reg[MC_REGC * 4] & MC_REGC_PF &&
576                                d->pending_timer_interrupts > 0)
577                                  d->pending_timer_interrupts --;                                  d->pending_timer_interrupts --;
578    
579                          d->reg[MC_REGC * 4] = 0x00;                          d->reg[MC_REGC * 4] = 0x00;
# Line 600  int dev_mc146818_access(struct cpu *cpu, Line 601  int dev_mc146818_access(struct cpu *cpu,
601   *  so it contains both rtc related stuff and the station's Ethernet address.   *  so it contains both rtc related stuff and the station's Ethernet address.
602   */   */
603  void dev_mc146818_init(struct machine *machine, struct memory *mem,  void dev_mc146818_init(struct machine *machine, struct memory *mem,
604          uint64_t baseaddr, int irq_nr, int access_style, int addrdiv)          uint64_t baseaddr, char *irq_path, int access_style, int addrdiv)
605  {  {
606          unsigned char ether_address[6];          unsigned char ether_address[6];
607          int i, dev_len;          int i, dev_len;
# Line 613  void dev_mc146818_init(struct machine *m Line 614  void dev_mc146818_init(struct machine *m
614          }          }
615    
616          memset(d, 0, sizeof(struct mc_data));          memset(d, 0, sizeof(struct mc_data));
617          d->irq_nr        = irq_nr;  
618          d->access_style  = access_style;          d->access_style  = access_style;
619          d->addrdiv       = addrdiv;          d->addrdiv       = addrdiv;
620    
621            INTERRUPT_CONNECT(irq_path, d->irq);
622    
623          d->use_bcd = 0;          d->use_bcd = 0;
624          switch (access_style) {          switch (access_style) {
625          case MC146818_SGI:          case MC146818_SGI:
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