rom/timer/timer_intern.h

   1 #ifndef _TIMER_INTERN_H
   2 #define _TIMER_INTERN_H
   3
   4 /*
   5     Copyright © 1995-2011, The AROS Development Team. All rights reserved.
   6     $Id$
   7
   8     Desc: Internal information about the timer.device and HIDD's
   9     Lang: english
  10 */
  11
  12 #include <exec/execbase.h>
  13 #include <exec/lists.h>
  14 #include <exec/interrupts.h>
  15 #include <exec/io.h>
  16 #include <exec/devices.h>
  17 #include <exec/interrupts.h>
  18 #include <devices/timer.h>
  19 #include <dos/bptr.h>
  20 #include <hardware/intbits.h>
  21 #include <aros/asmcall.h>
  22
  23 /* Platform-specific portion */
  24 #include <timer_platform.h>
  25
  26 /*
  27  * First two of these correspond to UNIT_MICROHZ and UNIT_VBLANK.
  28  * This is important.
  29  */
  30 #define TL_MICROHZ      0
  31 #define TL_VBLANK       1
  32 #define TL_WAITVBL      2
  33 #define NUM_LISTS       3
  34
  35 struct TimerBase
  36 {
  37     /* Required by the system */
  38     struct Device        tb_Device;             /* Our base                                             */
  39     APTR                 tb_KernelBase;         /* kernel.resource base                                 */
  40
  41     /* Time counters */
  42     struct timeval       tb_CurrentTime;        /* Absolute system time. Can be set by TR_SETSYSTIME.   */
  43     struct timeval       tb_Elapsed;            /* Relative system time. Used for measuring intervals.  */
  44
  45     /* This is required for hardware-specific code */
  46     APTR                 tb_TimerIRQHandle;     /* Timer IRQ handle                                     */
  47     struct Interrupt     tb_VBlankInt;          /* Used by older implementations, needs to be removed   */
  48
  49     /* Request queues */
  50     struct MinList       tb_Lists[NUM_LISTS];
  51
  52     /* EClock counter */
  53     UQUAD                tb_ticks_total;        /* Effective EClock value                               */
  54     ULONG                tb_ticks_sec;          /* Fraction of second for CurrentTime in ticks          */
  55     ULONG                tb_ticks_elapsed;      /* Fraction of second for Elapsed in ticks              */
  56     ULONG                tb_prev_tick;          /* Hardware-specific                                    */
  57     ULONG                tb_eclock_rate;        /* EClock frequency                                     */
  58
  59 #ifdef USE_VBLANK_EMU
  60     struct timerequest   tb_vblank_timerequest; /* VBlank emulation request                             */
  61 #endif
  62
  63     struct PlatformTimer tb_Platform;           /* Platform-specific data                               */
  64 };
  65
  66 #define GetTimerBase(tb)        ((struct TimerBase *)(tb))
  67 #define GetDevice(tb)           ((struct Device *)(tb))
  68
  69 BOOL common_BeginIO(struct timerequest *timereq, struct TimerBase *TimerBase);
  70 void handleMicroHZ(struct TimerBase *TimerBase, struct ExecBase *SysBase);
  71 void handleVBlank(struct TimerBase *TimerBase, struct ExecBase *SysBase);
  72 void EClockUpdate(struct TimerBase *TimerBase);
  73 void EClockSet(struct TimerBase *TimerBase);
  74
  75 /* Call exec VBlank vector, if present */
  76 static inline void vblank_Cause(struct ExecBase *SysBase)
  77 {
  78     struct IntVector *iv = &SysBase->IntVects[INTB_VERTB];
  79
  80     if (iv->iv_Code)
  81         AROS_INTC2(iv->iv_Code, iv->iv_Data, INTF_VERTB);
  82 }
  83
  84 #endif /* _TIMER_INTERN_H */