/**
* \file
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* Copyright 2007 Develer S.r.l. (http://www.develer.com/)
* This file is part of DevLib - See README.devlib for information.
* -->
*
* \author Francesco Sacchi <batt@develer.com>
*
- * \brief System irq handler for Atmel AT91 ARM7 processors.
+ * \brief System IRQ handler for Atmel AT91 ARM7 processors.
*
* In Atmel AT91 ARM7TDMI processors, there are various
* peripheral interrupt sources.
* In general, every source has its own interrupt vector, so it
* is possible to assign a specific handler for each interrupt
- * indipendently.
+ * independently.
* However, there are a few sources called "system sources" that
- * share a common IRQ line and vector, called "system irq".
- * So a unic system irq handler is implemented here.
+ * share a common IRQ line and vector, called "system IRQ".
+ * So a unique system IRQ dispatcher is implemented here.
* This module also contains an interface to manage every source
- * indipendently. It is possible to assign to every system irq
- * a specific irq handler.
+ * independently. It is possible to assign to every system IRQ
+ * a specific IRQ handler.
*
* \see sysirq_setHandler
* \see sysirq_setEnable
*/
#include "sysirq.h"
-#include "at91.h"
+#include "at91sam7s.h"
#include <cfg/cpu.h>
-
-#warning Very untested!
-
-/**
- * Returns the state of the Periodic Interval Timer
- * interrupt.
- */
-static bool pit_enable(void)
-{
- return PIT_MR & BV(PITIEN);
-}
-
-/**
- * Returns the state of the Periodic Interval Timer
- * interrupt.
- * \return true is PIT has triggered and interrupt, false otherwise
- */
-static bool pit_trigger(void)
-{
- return PIT_SR & BV(PITS);
-}
+#include <cfg/module.h>
+#include <cfg/macros.h>
/**
* Enable/disable the Periodic Interrupt Timer
* interrupt.
*/
-static void pit_setEnable(bool enable)
+INLINE void pit_setEnable(bool enable)
{
if (enable)
PIT_MR |= BV(PITIEN);
{
/* PIT, Periodic Interval Timer (System timer)*/
{
- .enable = pit_enable,
- .trigger = pit_trigger,
+ .enabled = false,
.setEnable = pit_setEnable,
.handler = NULL,
},
/**
- * System IRQ handler.
+ * System IRQ dispatcher.
* This is the entry point for all system IRQs in AT91.
* This function checks for interrupt enable state of
* various sources (system timer, etc..) and calls
* the corresponding handler.
*/
-static void sysirq_handler(void)
+static void sysirq_dispatcher(void)
{
#warning TODO add IRQ prologue/epilogue
- for (int i = 0; i < countof(sysirq_tab); i++)
+ for (unsigned i = 0; i < countof(sysirq_tab); i++)
{
- if (sysirq_tab[i].enable()
- && sysirq_tab[i].trigger()
+ if (sysirq_tab[i].enabled
&& sysirq_tab[i].handler)
sysirq_tab[i].handler();
}
#define SYSIRQ_PRIORITY 0 ///< default priority for system irqs.
+
+MOD_DEFINE(sysirq);
+
/**
- * Init system irq handling.
+ * Init system IRQ handling.
* \note all system interrupts are disabled.
*/
void sysirq_init(void)
IRQ_SAVE_DISABLE(flags);
/* Disable all system interrupts */
- for (int i = 0; i < countof(sysirq_tab); i++)
+ for (unsigned i = 0; i < countof(sysirq_tab); i++)
sysirq_tab[i].setEnable(false);
/* Set the vector. */
- AIC_SVR(SYSC_ID) = sysirq_handler;
- /* Initialize to edge triggered with defined priority. */
- AIC_SMR(SYSC_ID) = BV(AIC_SRCTYPE_INT_EDGE_TRIGGERED) | SYSIRQ_PRIORITY;
- /* Clear interrupt */
- AIC_ICCR = BV(SYSC_ID);
+ AIC_SVR(SYSC_ID) = sysirq_dispatcher;
+ /* Initialize to edge triggered with defined priority. */
+ AIC_SMR(SYSC_ID) = AIC_SRCTYPE_INT_EDGE_TRIGGERED | SYSIRQ_PRIORITY;
+ /* Clear interrupt */
+ AIC_ICCR = BV(SYSC_ID);
+
IRQ_RESTORE(flags);
+ MOD_INIT(sysirq);
}
/**
- * Helper function used to set handler for system irq \a irq.
+ * Helper function used to set handler for system IRQ \a irq.
*/
void sysirq_setHandler(sysirq_t irq, sysirq_handler_t handler)
{
}
/**
- * Helper function used to enable/disable system irq \a irq.
+ * Helper function used to enable/disable system IRQ \a irq.
*/
void sysirq_setEnable(sysirq_t irq, bool enable)
{
ASSERT(irq >= 0);
ASSERT(irq < SYSIRQ_CNT);
+
sysirq_tab[irq].setEnable(enable);
+ sysirq_tab[irq].enabled = enable;
}
/**
- * Helper function used to get system irq \a irq state.
+ * Helper function used to get system IRQ \a irq state.
*/
-bool sysirq_enable(sysirq_t irq)
+bool sysirq_enabled(sysirq_t irq)
{
ASSERT(irq >= 0);
ASSERT(irq < SYSIRQ_CNT);
- return sysirq_tab[irq].enable();
+
+ return sysirq_tab[irq].enabled;
}
projects / bertos.git / blobdiff