arch/avr32/intc.c

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#include <assert.h>
#include <io.h>
#include <irq_handler.h>
#include <linkerscript.h>
#include <status-codes.h>
#include <types.h>
#include <chip/memory-map.h>

#define HANDLER_OFFSET_MASK     0x00ffffff
#define INTLEV_MASK             0x00000003
#define INTLEV_SHIFT            30

void __setup_irq_handler(int irq, void (*entry)(void), void **pdata,
                unsigned int level, void *data)
{
        unsigned long   handler_offset;
        uint32_t        intpr;

        /* Do not attempt to initialize the same irq twice */
        assert(*pdata == NULL);

        /* Level must be a number between 0 and 3 inclusive */
        assert(!(level & ~INTLEV_MASK));

        handler_offset = (unsigned long)entry - (unsigned long)_evba;

        /* The low-level handler must not be placed too far from EVBA */
        assert(!(handler_offset & ~HANDLER_OFFSET_MASK));

        intpr = handler_offset;
        intpr |= level << INTLEV_SHIFT;
        mmio_write32((void *)INTC_BASE + 4 * irq, intpr);
        *pdata = data;
}

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