BOOL CPU_INTC_InterruptDisable(UINT32 Irq_Index)
{
BOOL WasEnabled;
if (Irq_Index >= ID_PERIPH_COUNT)
return FALSE;
GLOBAL_LOCK(irq);
WasEnabled = ((AIC->AIC_IMR & AIC_IMR_INTM) != 0) ? TRUE : FALSE;
IRQ_DisableIT(Irq_Index);
return WasEnabled;
}
BOOL CPU_INTC_DeactivateInterrupt(UINT32 Irq_Index)
{
// figure out the interrupt
IRQ_VECTORING* IsrVector = IRQToIRQVector(Irq_Index);
if (!IsrVector)
return FALSE;
GLOBAL_LOCK(irq);
IRQ_ClearIT(Irq_Index);
IRQ_DisableIT(Irq_Index);
// as it is stub, just put the Priority to the ISR parameter
IsrVector->Handler.Initialize(STUB_ISRVector, (void*)(size_t)IsrVector->Priority);
return TRUE;
}
//------------------------------------------------------------------------------
/// Configures the PIT to generate 1ms ticks.
//------------------------------------------------------------------------------
static void ConfigurePit(void)
{
// Initialize and enable the PIT
PIT_Init(PIT_PERIOD, BOARD_MCK / 1000000);
// Disable the interrupt on the interrupt controller
IRQ_DisableIT(AT91C_ID_SYS);
// Configure the AIC for PIT interrupts
IRQ_ConfigureIT(AT91C_ID_SYS, 0, ISR_Pit);
// Enable the interrupt on the interrupt controller
IRQ_EnableIT(AT91C_ID_SYS);
// Enable the interrupt on the pit
PIT_EnableIT();
// Enable the pit
PIT_Enable();
}
BOOL CPU_INTC_ActivateInterrupt(UINT32 Irq_Index, HAL_CALLBACK_FPN ISR, void* ISR_Param)
{
// figure out the interrupt
IRQ_VECTORING* IsrVector = IRQToIRQVector(Irq_Index);
if (!IsrVector)
return FALSE;
GLOBAL_LOCK(irq);
IRQ_DisableIT(Irq_Index);
IRQ_ClearIT(Irq_Index);
// set the vector
IsrVector->Handler.Initialize(ISR, ISR_Param);
IRQ_EnableIT(Irq_Index);
return TRUE;
}
