arch/all-mingw32/kernel/kernel_arch.h

   1 /*
   2  * In Windows-hosted kernel IRQs are used to receive events from emulated
   3  * hardware. Hardware is mostly emulated using Windows threads running
   4  * asynchronously to AROS. When the thread finishes its job it calls host-side
   5  * KrnCauseSystemIRQ() function in order to initiate an IRQ in AROS.
   6  *
   7  * IRQs are managed dynamically using host-side KrnAllocSystemIRQ() and KrnFreeSystemIRQ() functions
   8  * except the following static allocations:
   9  *
  10  * IRQ 0 - main system periodic timer (50 Hz). Used internally by kernel.resource
  11  *         for task switching and VBlank emulation. Exec uses it as a VBLANK source.
  12  *         In current implementation it can not be caused manually using KrnCauseSystemIRQ().
  13  *
  14  * The whole described thing is experimental and subject to change.
  15  */
  16 #define IRQ_TIMER 0
  17
  18 /* We use only one list for all IRQs */
  19 #define IRQ_COUNT 1
  20
  21 /* We have no interrupt controller */
  22 #define ictl_enable_irq(irq, base)
  23 #define ictl_disable_irq(irq, base)