Commit 05ecd5a1 authored by Pawel Moll's avatar Pawel Moll Committed by Paul Mundt
Browse files

sh: Simplify "multi-evt" interrupt handling. 



This patch changes the way in which "multi-evt" interrups are handled.
The intc_evt2irq_table and related intc_evt2irq() have been removed and
the "redirecting" handler is installed for the coupled interrupts.

Thanks to that the do_IRQ() function don't have to use another level
of indirection for all the interrupts...

Signed-off-by: default avatarPawel Moll <pawel.moll@st.com>
Signed-off-by: default avatarStuart Menefy <stuart.menefy@st.com>
Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 788e6af3

arch/sh/kernel/irq.c

+1 −1
Original line number Diff line number Diff line
@@ -114,7 +114,7 @@ asmlinkage int do_IRQ(unsigned int irq, struct pt_regs *regs) 
#endif



	irq_enter();

	irq = irq_demux(intc_evt2irq(irq));

	irq = irq_demux(evt2irq(irq));



#ifdef CONFIG_IRQSTACKS

	curctx = (union irq_ctx *)current_thread_info();

drivers/sh/intc.c

+17 −37
Original line number Diff line number Diff line
@@ -663,16 +663,9 @@ static unsigned int __init save_reg(struct intc_desc_int *d, 
	return 0;

}



static unsigned char *intc_evt2irq_table;



unsigned int intc_evt2irq(unsigned int vector)

static void intc_redirect_irq(unsigned int irq, struct irq_desc *desc)

{

	unsigned int irq = evt2irq(vector);



	if (intc_evt2irq_table && intc_evt2irq_table[irq])

		irq = intc_evt2irq_table[irq];



	return irq;

	generic_handle_irq((unsigned int)get_irq_data(irq));

}



void __init register_intc_controller(struct intc_desc *desc)
@@ -745,34 +738,6 @@ void __init register_intc_controller(struct intc_desc *desc) 


	BUG_ON(k > 256); /* _INTC_ADDR_E() and _INTC_ADDR_D() are 8 bits */



	/* keep the first vector only if same enum is used multiple times */

	for (i = 0; i < desc->nr_vectors; i++) {

		struct intc_vect *vect = desc->vectors + i;

		int first_irq = evt2irq(vect->vect);



		if (!vect->enum_id)

			continue;



		for (k = i + 1; k < desc->nr_vectors; k++) {

			struct intc_vect *vect2 = desc->vectors + k;



			if (vect->enum_id != vect2->enum_id)

				continue;



			vect2->enum_id = 0;



			if (!intc_evt2irq_table)

				intc_evt2irq_table = kzalloc(NR_IRQS, GFP_NOWAIT);



			if (!intc_evt2irq_table) {

				pr_warning("intc: cannot allocate evt2irq!\n");

				continue;

			}



			intc_evt2irq_table[evt2irq(vect2->vect)] = first_irq;

		}

	}



	/* register the vectors one by one */

	for (i = 0; i < desc->nr_vectors; i++) {

		struct intc_vect *vect = desc->vectors + i;
@@ -789,6 +754,21 @@ void __init register_intc_controller(struct intc_desc *desc) 
		}



		intc_register_irq(desc, d, vect->enum_id, irq);



		for (k = i + 1; k < desc->nr_vectors; k++) {

			struct intc_vect *vect2 = desc->vectors + k;

			unsigned int irq2 = evt2irq(vect2->vect);



			if (vect->enum_id != vect2->enum_id)

				continue;



			vect2->enum_id = 0;



			/* redirect this interrupts to the first one */

			set_irq_chip_and_handler_name(irq2, &d->chip,

					intc_redirect_irq, "redirect");

			set_irq_data(irq2, (void *)irq);

		}

	}

}

include/linux/sh_intc.h

+0 −1
Original line number Diff line number Diff line
@@ -85,7 +85,6 @@ struct intc_desc symbol __initdata = { \ 
}

#endif



unsigned int intc_evt2irq(unsigned int vector);

void __init register_intc_controller(struct intc_desc *desc);

int intc_set_priority(unsigned int irq, unsigned int prio);

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