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authorVineet Gupta <vgupta@synopsys.com>2017-02-01 09:44:33 -0800
committerVineet Gupta <vgupta@synopsys.com>2017-02-06 09:37:57 -0800
commit179cf194e6d153fb6daeca811253502d5c84e4c8 (patch)
treec6bbe60670787391e3c79264ea4f00b920f20fb4 /arch/arc
parentf33b8cddc8ad8ce83cd3214406bcf68ec6c4d8ec (diff)
downloadlinux-179cf194e6d153fb6daeca811253502d5c84e4c8.tar.bz2
ARCv2: intc: Use runtime value of irq count for setting up intc
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc')
-rw-r--r--arch/arc/include/asm/irq.h1
-rw-r--r--arch/arc/kernel/intc-arcv2.c28
2 files changed, 18 insertions, 11 deletions
diff --git a/arch/arc/include/asm/irq.h b/arch/arc/include/asm/irq.h
index a3880b423925..0618b1ce707c 100644
--- a/arch/arc/include/asm/irq.h
+++ b/arch/arc/include/asm/irq.h
@@ -21,6 +21,7 @@
#ifdef CONFIG_ISA_ARCV2
#define IPI_IRQ 19
#define SOFTIRQ_IRQ 21
+#define FIRST_EXT_IRQ 24
#endif
#include <linux/interrupt.h>
diff --git a/arch/arc/kernel/intc-arcv2.c b/arch/arc/kernel/intc-arcv2.c
index 5c5769dd8f5d..4d3166f9bbc9 100644
--- a/arch/arc/kernel/intc-arcv2.c
+++ b/arch/arc/kernel/intc-arcv2.c
@@ -14,7 +14,15 @@
#include <linux/irqchip.h>
#include <asm/irq.h>
-#define NR_CPU_IRQS 32 /* number of irq lines coming in */
+#define NR_EXCEPTIONS 16
+
+struct bcr_irq_arcv2 {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad:3, firq:1, prio:4, exts:8, irqs:8, ver:8;
+#else
+ unsigned int ver:8, irqs:8, exts:8, prio:4, firq:1, pad:3;
+#endif
+};
/*
* Early Hardware specific Interrupt setup
@@ -25,14 +33,7 @@
void arc_init_IRQ(void)
{
unsigned int tmp, irq_prio;
-
- struct irq_build {
-#ifdef CONFIG_CPU_BIG_ENDIAN
- unsigned int pad:3, firq:1, prio:4, exts:8, irqs:8, ver:8;
-#else
- unsigned int ver:8, irqs:8, exts:8, prio:4, firq:1, pad:3;
-#endif
- } irq_bcr;
+ struct bcr_irq_arcv2 irq_bcr;
struct aux_irq_ctrl {
#ifdef CONFIG_CPU_BIG_ENDIAN
@@ -117,7 +118,7 @@ static int arcv2_irq_map(struct irq_domain *d, unsigned int irq,
* core intc IRQs [16, 23]:
* Statically assigned always private-per-core (Timers, WDT, IPI, PCT)
*/
- if (hw < 24) {
+ if (hw < FIRST_EXT_IRQ) {
/*
* A subsequent request_percpu_irq() fails if percpu_devid is
* not set. That in turns sets NOAUTOEN, meaning each core needs
@@ -142,11 +143,16 @@ static int __init
init_onchip_IRQ(struct device_node *intc, struct device_node *parent)
{
struct irq_domain *root_domain;
+ struct bcr_irq_arcv2 irq_bcr;
+ unsigned int nr_cpu_irqs;
+
+ READ_BCR(ARC_REG_IRQ_BCR, irq_bcr);
+ nr_cpu_irqs = irq_bcr.irqs + NR_EXCEPTIONS;
if (parent)
panic("DeviceTree incore intc not a root irq controller\n");
- root_domain = irq_domain_add_linear(intc, NR_CPU_IRQS, &arcv2_irq_ops, NULL);
+ root_domain = irq_domain_add_linear(intc, nr_cpu_irqs, &arcv2_irq_ops, NULL);
if (!root_domain)
panic("root irq domain not avail\n");