summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/kernel/irq.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/kernel/irq.c')
-rw-r--r--arch/powerpc/kernel/irq.c47
1 files changed, 22 insertions, 25 deletions
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 30817d9..d3ce67c 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -53,6 +53,8 @@
#include <linux/bootmem.h>
#include <linux/pci.h>
#include <linux/debugfs.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
#include <asm/uaccess.h>
#include <asm/system.h>
@@ -64,6 +66,8 @@
#include <asm/ptrace.h>
#include <asm/machdep.h>
#include <asm/udbg.h>
+#include <asm/dbell.h>
+
#ifdef CONFIG_PPC64
#include <asm/paca.h>
#include <asm/firmware.h>
@@ -153,14 +157,28 @@ notrace void raw_local_irq_restore(unsigned long en)
if (get_hard_enabled())
return;
+#if defined(CONFIG_BOOKE) && defined(CONFIG_SMP)
+ /* Check for pending doorbell interrupts and resend to ourself */
+ doorbell_check_self();
+#endif
+
/*
* Need to hard-enable interrupts here. Since currently disabled,
* no need to take further asm precautions against preemption; but
* use local_paca instead of get_paca() to avoid preemption checking.
*/
local_paca->hard_enabled = en;
+
+#ifndef CONFIG_BOOKE
+ /* On server, re-trigger the decrementer if it went negative since
+ * some processors only trigger on edge transitions of the sign bit.
+ *
+ * BookE has a level sensitive decrementer (latches in TSR) so we
+ * don't need that
+ */
if ((int)mfspr(SPRN_DEC) < 0)
mtspr(SPRN_DEC, 1);
+#endif /* CONFIG_BOOKE */
/*
* Force the delivery of pending soft-disabled interrupts on PS3.
@@ -295,7 +313,10 @@ void fixup_irqs(const struct cpumask *map)
for_each_irq(irq) {
desc = irq_to_desc(irq);
- if (desc && desc->status & IRQ_PER_CPU)
+ if (!desc)
+ continue;
+
+ if (desc->status & IRQ_PER_CPU)
continue;
cpumask_and(mask, desc->affinity, map);
@@ -317,7 +338,6 @@ void fixup_irqs(const struct cpumask *map)
}
#endif
-#ifdef CONFIG_IRQSTACKS
static inline void handle_one_irq(unsigned int irq)
{
struct thread_info *curtp, *irqtp;
@@ -358,12 +378,6 @@ static inline void handle_one_irq(unsigned int irq)
if (irqtp->flags)
set_bits(irqtp->flags, &curtp->flags);
}
-#else
-static inline void handle_one_irq(unsigned int irq)
-{
- generic_handle_irq(irq);
-}
-#endif
static inline void check_stack_overflow(void)
{
@@ -455,7 +469,6 @@ void exc_lvl_ctx_init(void)
}
#endif
-#ifdef CONFIG_IRQSTACKS
struct thread_info *softirq_ctx[NR_CPUS] __read_mostly;
struct thread_info *hardirq_ctx[NR_CPUS] __read_mostly;
@@ -492,10 +505,6 @@ static inline void do_softirq_onstack(void)
irqtp->task = NULL;
}
-#else
-#define do_softirq_onstack() __do_softirq()
-#endif /* CONFIG_IRQSTACKS */
-
void do_softirq(void)
{
unsigned long flags;
@@ -813,18 +822,6 @@ unsigned int irq_create_of_mapping(struct device_node *controller,
}
EXPORT_SYMBOL_GPL(irq_create_of_mapping);
-unsigned int irq_of_parse_and_map(struct device_node *dev, int index)
-{
- struct of_irq oirq;
-
- if (of_irq_map_one(dev, index, &oirq))
- return NO_IRQ;
-
- return irq_create_of_mapping(oirq.controller, oirq.specifier,
- oirq.size);
-}
-EXPORT_SYMBOL_GPL(irq_of_parse_and_map);
-
void irq_dispose_mapping(unsigned int virq)
{
struct irq_host *host;
OpenPOWER on IntegriCloud