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-rw-r--r--arch/microblaze/kernel/intc.c61
-rw-r--r--arch/microblaze/kernel/irq.c24
-rw-r--r--arch/microblaze/kernel/process.c4
-rw-r--r--arch/microblaze/kernel/setup.c2
4 files changed, 42 insertions, 49 deletions
diff --git a/arch/microblaze/kernel/intc.c b/arch/microblaze/kernel/intc.c
index 3003d2f9f551..6c54d4dcdec3 100644
--- a/arch/microblaze/kernel/intc.c
+++ b/arch/microblaze/kernel/intc.c
@@ -9,6 +9,7 @@
*/
#include <linux/init.h>
+#include <linux/irqdomain.h>
#include <linux/irq.h>
#include <asm/page.h>
#include <linux/io.h>
@@ -25,8 +26,6 @@ static unsigned int intc_baseaddr;
#define INTC_BASE intc_baseaddr
#endif
-unsigned int nr_irq;
-
/* No one else should require these constants, so define them locally here. */
#define ISR 0x00 /* Interrupt Status Register */
#define IPR 0x04 /* Interrupt Pending Register */
@@ -84,24 +83,45 @@ static struct irq_chip intc_dev = {
.irq_mask_ack = intc_mask_ack,
};
-unsigned int get_irq(struct pt_regs *regs)
+static struct irq_domain *root_domain;
+
+unsigned int get_irq(void)
{
- int irq;
+ unsigned int hwirq, irq = -1;
- /*
- * NOTE: This function is the one that needs to be improved in
- * order to handle multiple interrupt controllers. It currently
- * is hardcoded to check for interrupts only on the first INTC.
- */
- irq = in_be32(INTC_BASE + IVR) + NO_IRQ_OFFSET;
- pr_debug("get_irq: %d\n", irq);
+ hwirq = in_be32(INTC_BASE + IVR);
+ if (hwirq != -1U)
+ irq = irq_find_mapping(root_domain, hwirq);
+
+ pr_debug("get_irq: hwirq=%d, irq=%d\n", hwirq, irq);
return irq;
}
+int xintc_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
+{
+ u32 intr_mask = (u32)d->host_data;
+
+ if (intr_mask & (1 << hw)) {
+ irq_set_chip_and_handler_name(irq, &intc_dev,
+ handle_edge_irq, "edge");
+ irq_clear_status_flags(irq, IRQ_LEVEL);
+ } else {
+ irq_set_chip_and_handler_name(irq, &intc_dev,
+ handle_level_irq, "level");
+ irq_set_status_flags(irq, IRQ_LEVEL);
+ }
+ return 0;
+}
+
+static const struct irq_domain_ops xintc_irq_domain_ops = {
+ .xlate = irq_domain_xlate_onetwocell,
+ .map = xintc_map,
+};
+
void __init init_IRQ(void)
{
- u32 i, intr_mask;
+ u32 nr_irq, intr_mask;
struct device_node *intc = NULL;
#ifdef CONFIG_SELFMOD_INTC
unsigned int intc_baseaddr = 0;
@@ -146,16 +166,9 @@ void __init init_IRQ(void)
/* Turn on the Master Enable. */
out_be32(intc_baseaddr + MER, MER_HIE | MER_ME);
- for (i = IRQ_OFFSET; i < (nr_irq + IRQ_OFFSET); ++i) {
- if (intr_mask & (0x00000001 << (i - IRQ_OFFSET))) {
- irq_set_chip_and_handler_name(i, &intc_dev,
- handle_edge_irq, "edge");
- irq_clear_status_flags(i, IRQ_LEVEL);
- } else {
- irq_set_chip_and_handler_name(i, &intc_dev,
- handle_level_irq, "level");
- irq_set_status_flags(i, IRQ_LEVEL);
- }
- irq_get_irq_data(i)->hwirq = i - IRQ_OFFSET;
- }
+ /* Yeah, okay, casting the intr_mask to a void* is butt-ugly, but I'm
+ * lazy and Michal can clean it up to something nicer when he tests
+ * and commits this patch. ~~gcl */
+ root_domain = irq_domain_add_linear(intc, nr_irq, &xintc_irq_domain_ops,
+ (void *)intr_mask);
}
diff --git a/arch/microblaze/kernel/irq.c b/arch/microblaze/kernel/irq.c
index bbebcae72c02..ace700afbfdf 100644
--- a/arch/microblaze/kernel/irq.c
+++ b/arch/microblaze/kernel/irq.c
@@ -31,14 +31,13 @@ void __irq_entry do_IRQ(struct pt_regs *regs)
trace_hardirqs_off();
irq_enter();
- irq = get_irq(regs);
+ irq = get_irq();
next_irq:
BUG_ON(!irq);
- /* Substract 1 because of get_irq */
- generic_handle_irq(irq + IRQ_OFFSET - NO_IRQ_OFFSET);
+ generic_handle_irq(irq);
- irq = get_irq(regs);
- if (irq) {
+ irq = get_irq();
+ if (irq != -1U) {
pr_debug("next irq: %d\n", irq);
++concurrent_irq;
goto next_irq;
@@ -48,18 +47,3 @@ next_irq:
set_irq_regs(old_regs);
trace_hardirqs_on();
}
-
-/* MS: There is no any advance mapping mechanism. We are using simple 32bit
- intc without any cascades or any connection that's why mapping is 1:1 */
-unsigned int irq_create_mapping(struct irq_host *host, irq_hw_number_t hwirq)
-{
- return hwirq + IRQ_OFFSET;
-}
-EXPORT_SYMBOL_GPL(irq_create_mapping);
-
-unsigned int irq_create_of_mapping(struct device_node *controller,
- const u32 *intspec, unsigned int intsize)
-{
- return intspec[0] + IRQ_OFFSET;
-}
-EXPORT_SYMBOL_GPL(irq_create_of_mapping);
diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c
index 7dcb5bfffb75..9155f7d92669 100644
--- a/arch/microblaze/kernel/process.c
+++ b/arch/microblaze/kernel/process.c
@@ -110,9 +110,7 @@ void cpu_idle(void)
rcu_idle_exit();
tick_nohz_idle_exit();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
check_pgt_cache();
}
}
diff --git a/arch/microblaze/kernel/setup.c b/arch/microblaze/kernel/setup.c
index e4f5956ee13c..9f79fb3bbfa0 100644
--- a/arch/microblaze/kernel/setup.c
+++ b/arch/microblaze/kernel/setup.c
@@ -51,8 +51,6 @@ void __init setup_arch(char **cmdline_p)
unflatten_device_tree();
- /* NOTE I think that this function is not necessary to call */
- /* irq_early_init(); */
setup_cpuinfo();
microblaze_cache_init();