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path: root/drivers/sh/intc.c
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Diffstat (limited to 'drivers/sh/intc.c')
-rw-r--r--drivers/sh/intc.c71
1 files changed, 34 insertions, 37 deletions
diff --git a/drivers/sh/intc.c b/drivers/sh/intc.c
index 3dd231a643b..559b5fe9dc0 100644
--- a/drivers/sh/intc.c
+++ b/drivers/sh/intc.c
@@ -77,7 +77,7 @@ static unsigned long ack_handle[NR_IRQS];
static inline struct intc_desc_int *get_intc_desc(unsigned int irq)
{
struct irq_chip *chip = get_irq_chip(irq);
- return (void *)((char *)chip - offsetof(struct intc_desc_int, chip));
+ return container_of(chip, struct intc_desc_int, chip);
}
static inline unsigned int set_field(unsigned int value,
@@ -95,16 +95,19 @@ static inline unsigned int set_field(unsigned int value,
static void write_8(unsigned long addr, unsigned long h, unsigned long data)
{
__raw_writeb(set_field(0, data, h), addr);
+ (void)__raw_readb(addr); /* Defeat write posting */
}
static void write_16(unsigned long addr, unsigned long h, unsigned long data)
{
__raw_writew(set_field(0, data, h), addr);
+ (void)__raw_readw(addr); /* Defeat write posting */
}
static void write_32(unsigned long addr, unsigned long h, unsigned long data)
{
__raw_writel(set_field(0, data, h), addr);
+ (void)__raw_readl(addr); /* Defeat write posting */
}
static void modify_8(unsigned long addr, unsigned long h, unsigned long data)
@@ -112,6 +115,7 @@ static void modify_8(unsigned long addr, unsigned long h, unsigned long data)
unsigned long flags;
local_irq_save(flags);
__raw_writeb(set_field(__raw_readb(addr), data, h), addr);
+ (void)__raw_readb(addr); /* Defeat write posting */
local_irq_restore(flags);
}
@@ -120,6 +124,7 @@ static void modify_16(unsigned long addr, unsigned long h, unsigned long data)
unsigned long flags;
local_irq_save(flags);
__raw_writew(set_field(__raw_readw(addr), data, h), addr);
+ (void)__raw_readw(addr); /* Defeat write posting */
local_irq_restore(flags);
}
@@ -128,6 +133,7 @@ static void modify_32(unsigned long addr, unsigned long h, unsigned long data)
unsigned long flags;
local_irq_save(flags);
__raw_writel(set_field(__raw_readl(addr), data, h), addr);
+ (void)__raw_readl(addr); /* Defeat write posting */
local_irq_restore(flags);
}
@@ -657,16 +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)
@@ -739,50 +738,48 @@ 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 */
+ /* register the vectors one by one */
for (i = 0; i < desc->nr_vectors; i++) {
struct intc_vect *vect = desc->vectors + i;
- int first_irq = evt2irq(vect->vect);
+ unsigned int irq = evt2irq(vect->vect);
+ struct irq_desc *irq_desc;
if (!vect->enum_id)
continue;
+ irq_desc = irq_to_desc_alloc_node(irq, numa_node_id());
+ if (unlikely(!irq_desc)) {
+ pr_info("can't get irq_desc for %d\n", irq);
+ continue;
+ }
+
+ 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;
-
- if (!intc_evt2irq_table)
- intc_evt2irq_table = kzalloc(NR_IRQS, GFP_NOWAIT);
-
- if (!intc_evt2irq_table) {
- pr_warning("intc: cannot allocate evt2irq!\n");
+ /*
+ * In the case of multi-evt handling and sparse
+ * IRQ support, each vector still needs to have
+ * its own backing irq_desc.
+ */
+ irq_desc = irq_to_desc_alloc_node(irq2, numa_node_id());
+ if (unlikely(!irq_desc)) {
+ pr_info("can't get irq_desc for %d\n", irq2);
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;
- unsigned int irq = evt2irq(vect->vect);
- struct irq_desc *irq_desc;
-
- if (!vect->enum_id)
- continue;
+ vect2->enum_id = 0;
- irq_desc = irq_to_desc_alloc_node(irq, numa_node_id());
- if (unlikely(!irq_desc)) {
- printk(KERN_INFO "can not get irq_desc for %d\n", irq);
- continue;
+ /* 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);
}
-
- intc_register_irq(desc, d, vect->enum_id, irq);
}
}