summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--arch/sh/kernel/irq.c2
-rw-r--r--drivers/sh/intc.c47
-rw-r--r--include/linux/sh_intc.h1
3 files changed, 49 insertions, 1 deletions
diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c
index 64b7690c664c..90d63aefd275 100644
--- a/arch/sh/kernel/irq.c
+++ b/arch/sh/kernel/irq.c
@@ -106,7 +106,7 @@ asmlinkage int do_IRQ(unsigned int irq, struct pt_regs *regs)
}
#endif
- irq = irq_demux(evt2irq(irq));
+ irq = irq_demux(intc_evt2irq(irq));
#ifdef CONFIG_IRQSTACKS
curctx = (union irq_ctx *)current_thread_info();
diff --git a/drivers/sh/intc.c b/drivers/sh/intc.c
index 58d24c5a76ce..d7b8959d9d92 100644
--- a/drivers/sh/intc.c
+++ b/drivers/sh/intc.c
@@ -568,6 +568,10 @@ static void __init intc_register_irq(struct intc_desc *desc,
if (!data[0] && data[1])
primary = 1;
+ if (!data[0] && !data[1])
+ pr_warning("intc: missing unique irq mask for 0x%04x\n",
+ irq2evt(irq));
+
data[0] = data[0] ? data[0] : intc_mask_data(desc, d, enum_id, 1);
data[1] = data[1] ? data[1] : intc_prio_data(desc, d, enum_id, 1);
@@ -641,6 +645,17 @@ 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)
+{
+ unsigned int irq = evt2irq(vector);
+
+ if (intc_evt2irq_table && intc_evt2irq_table[irq])
+ irq = intc_evt2irq_table[irq];
+
+ return irq;
+}
void __init register_intc_controller(struct intc_desc *desc)
{
@@ -705,9 +720,41 @@ 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 = alloc_bootmem(NR_IRQS);
+
+ 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;
+ if (!vect->enum_id)
+ continue;
+
intc_register_irq(desc, d, vect->enum_id, evt2irq(vect->vect));
}
}
diff --git a/include/linux/sh_intc.h b/include/linux/sh_intc.h
index 68e212ff9dde..eb1423a0078d 100644
--- a/include/linux/sh_intc.h
+++ b/include/linux/sh_intc.h
@@ -85,6 +85,7 @@ 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);