kernel/fiasco/src/kern/arm/bsp/s3c/timer-arm-s3c2410.cpp

   1 INTERFACE [arm && s3c2410]:
   2
   3 #include "kmem.h"
   4
   5 EXTENSION class Timer
   6 {
   7 public:
   8   static unsigned irq() { return 14; }
   9
  10 private:
  11   enum {
  12     TCFG0  = Kmem::Timer_map_base + 0x00,
  13     TCFG1  = Kmem::Timer_map_base + 0x04,
  14     TCON   = Kmem::Timer_map_base + 0x08,
  15     TCNTB0 = Kmem::Timer_map_base + 0x0c,
  16     TCMPB0 = Kmem::Timer_map_base + 0x10,
  17     TCNTO0 = Kmem::Timer_map_base + 0x14,
  18     TCNTB1 = Kmem::Timer_map_base + 0x18,
  19     TCMPB1 = Kmem::Timer_map_base + 0x1c,
  20     TCNTO1 = Kmem::Timer_map_base + 0x20,
  21     TCNTB2 = Kmem::Timer_map_base + 0x24,
  22     TCMPB2 = Kmem::Timer_map_base + 0x28,
  23     TCNTO2 = Kmem::Timer_map_base + 0x2c,
  24     TCNTB3 = Kmem::Timer_map_base + 0x30,
  25     TCMPB3 = Kmem::Timer_map_base + 0x34,
  26     TCNTO3 = Kmem::Timer_map_base + 0x38,
  27     TCNTB4 = Kmem::Timer_map_base + 0x3c,
  28     TCNTO4 = Kmem::Timer_map_base + 0x40,
  29
  30   };
  31 };
  32
  33 // -----------------------------------------------------------------------
  34 IMPLEMENTATION [arm && s3c2410]:
  35
  36 #include "config.h"
  37 #include "kip.h"
  38 #include "io.h"
  39
  40 #include <cstdio>
  41
  42 IMPLEMENT
  43 void Timer::init(unsigned)
  44 {
  45   Io::write(0, TCFG0); // prescaler config
  46   Io::write(0, TCFG1); // mux select
  47   Io::write(33333, TCNTB4); // reload value
  48
  49   Io::write(5 << 20, TCON); // start + autoreload
  50 }
  51
  52 PUBLIC static inline
  53 void
  54 Timer::acknowledge()
  55 {}
  56
  57 static inline
  58 Unsigned64
  59 Timer::timer_to_us(Unsigned32 /*cr*/)
  60 { return 0; }
  61
  62 static inline
  63 Unsigned64
  64 Timer::us_to_timer(Unsigned64 us)
  65 { (void)us; return 0; }
  66
  67 IMPLEMENT inline
  68 void
  69 Timer::update_one_shot(Unsigned64 wakeup)
  70 {
  71   (void)wakeup;
  72 }
  73
  74 IMPLEMENT inline NEEDS["config.h", "kip.h", "io.h", Timer::timer_to_us]
  75 Unsigned64
  76 Timer::system_clock()
  77 {
  78   if (Config::Scheduler_one_shot)
  79     //return Kip::k()->clock + timer_to_us(Io::read<Unsigned32>(OSCR));
  80     return 0;
  81   else
  82     return Kip::k()->clock;
  83 }