aboutsummaryrefslogtreecommitdiff
path: root/drivers/irqchip
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-gic.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index 29b876b98d4..8389e381f7c 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -757,6 +757,33 @@ void gic_migrate_target(unsigned int new_cpu_id)
}
}
}
+
+/*
+ * gic_get_sgir_physaddr - get the physical address for the SGI register
+ *
+ * REturn the physical address of the SGI register to be used
+ * by some early assembly code when the kernel is not yet available.
+ */
+static unsigned long gic_dist_physaddr;
+
+unsigned long gic_get_sgir_physaddr(void)
+{
+ if (!gic_dist_physaddr)
+ return 0;
+ return gic_dist_physaddr + GIC_DIST_SOFTINT;
+}
+
+void __init gic_init_physaddr(struct device_node *node)
+{
+ struct resource res;
+ if (of_address_to_resource(node, 0, &res) == 0) {
+ gic_dist_physaddr = res.start;
+ pr_info("GIC physical location is %#lx\n", gic_dist_physaddr);
+ }
+}
+
+#else
+#define gic_init_physaddr(node) do { } while(0)
#endif
static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq,
@@ -940,6 +967,8 @@ int __init gic_of_init(struct device_node *node, struct device_node *parent)
percpu_offset = 0;
gic_init_bases(gic_cnt, -1, dist_base, cpu_base, percpu_offset, node);
+ if (!gic_cnt)
+ gic_init_physaddr(node);
if (parent) {
irq = irq_of_parse_and_map(node, 0);