minix/kernel/arch/earm/omap_intr.c

#include <sys/types.h>
#include <machine/cpu.h>
#include <minix/type.h>
#include <minix/board.h>
#include <io.h>

#include "kernel/kernel.h"
#include "kernel/proc.h"
#include "kernel/vm.h"
#include "kernel/proto.h"
#include "arch_proto.h"
#include "hw_intr.h"

#include "omap_intr.h"
static struct omap_intr {
	vir_bytes base;
	int size;
} omap_intr;


static kern_phys_map intr_phys_map;

int intr_init(const int auto_eoi)
{
    if (BOARD_IS_BBXM(machine.board_id)){
	omap_intr.base = OMAP3_DM37XX_INTR_BASE;
    } else if (BOARD_IS_BB(machine.board_id)){
	omap_intr.base = OMAP3_AM335X_INTR_BASE;
    } else {
	panic("Can not do the interrupt setup. machine (0x%08x) is unknown\n",machine.board_id);
    };
    omap_intr.size = 0x1000 ; /* 4K */

    kern_phys_map_ptr(omap_intr.base,omap_intr.size,
	&intr_phys_map, (vir_bytes) &omap_intr.base);
    return 0;
}

void omap3_irq_handle(void) {
	/* Function called from assembly to handle interrupts */

	/* get irq */
	int irq = mmio_read(omap_intr.base + OMAP3_INTCPS_SIR_IRQ) & OMAP3_INTR_ACTIVEIRQ_MASK;
	/* handle irq */
	irq_handle(irq);
	/* re-enable. this should not trigger interrupts due to current cpsr state */
    	mmio_write(omap_intr.base + OMAP3_INTCPS_CONTROL,OMAP3_INTR_NEWIRQAGR);
	
}

void omap3_irq_unmask(int irq)
{
    mmio_write(OMAP3_INTR_MIR_CLEAR(omap_intr.base, irq >> 5), 1 << (irq & 0x1f));
}

void omap3_irq_mask(const int irq)
{
    mmio_write(OMAP3_INTR_MIR_SET(omap_intr.base, irq >> 5), 1 << (irq & 0x1f));
}