Merge branch "preempt" in "trunk".

[bertos.git] / bertos / cpu / arm / drv / timer_at91.h

diff --git a/bertos/cpu/arm/drv/timer_at91.h b/bertos/cpu/arm/drv/timer_at91.h
index aed153925dcc8fe0e22a7a28a63c949a2f06d265..68e5561e03e9894721d3ff477e19d7f221b49982 100644 (file)
--- a/bertos/cpu/arm/drv/timer_at91.h
+++ b/bertos/cpu/arm/drv/timer_at91.h
@@ -40,10 +40,13 @@
 #ifndef DRV_AT91_TIMER_H
 #define DRV_AT91_TIMER_H
 
-#include "hw/hw_cpu.h"            /* CLOCK_FREQ */
+#include <hw/hw_cpufreq.h>     /* CPU_FREQ */
 
 #include "cfg/cfg_timer.h"     /* CONFIG_TIMER */
 #include <cfg/compiler.h>      /* uint8_t */
+#include <cfg/macros.h>        /* BV */
+
+#include <io/arm.h>
 
 /**
  * \name Values for CONFIG_TIMER.
@@ -61,21 +64,47 @@
  */
 #if (CONFIG_TIMER == TIMER_ON_PIT)
 
-       void timer_handler(void);
+       /*
+        * On ARM all IRQs are handled by the sysirq_dispatcher, so the actual
+        * timer handler can be treated like any other normal routine.
+        */
+       #define DEFINE_TIMER_ISR        void timer_handler(void);       \
+                                       void timer_handler(void)
 
-       #define DEFINE_TIMER_ISR     void timer_handler(void)
        #define TIMER_TICKS_PER_SEC  1000
-       #define TIMER_HW_CNT         (CLOCK_FREQ / (16 * TIMER_TICKS_PER_SEC) - 1)
+       #define TIMER_HW_CNT         (CPU_FREQ / (16 * TIMER_TICKS_PER_SEC) - 1)
 
        /** Frequency of the hardware high-precision timer. */
-       #define TIMER_HW_HPTICKS_PER_SEC (CLOCK_FREQ / 16)
+       #define TIMER_HW_HPTICKS_PER_SEC (CPU_FREQ / 16)
 
-       /// Type of time expressed in ticks of the hardware high-precision timer
+       /** Type of time expressed in ticks of the hardware high-precision timer */
        typedef uint32_t hptime_t;
+       #define SIZEOF_HPTIME_T 4
+
+       INLINE void timer_hw_irq(void)
+       {
+               /* Reset counters, this is needed to reset timer and interrupt flags */
+               uint32_t dummy = PIVR;
+               (void) dummy;
+       }
+
+       INLINE bool timer_hw_triggered(void)
+       {
+               return PIT_SR & BV(PITS);
+       }
+
+       INLINE hptime_t timer_hw_hpread(void)
+       {
+               /* In the upper part of PIT_PIIR there is unused data */
+               return PIIR & CPIV_MASK;
+       }
+
 #else
 
        #error Unimplemented value for CONFIG_TIMER
 #endif /* CONFIG_TIMER */
 
+void timer_hw_init(void);
+
 
 #endif /* DRV_TIMER_AT91_H */