1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c
index aeaa061f0dbf..9e17ef27a183 100644
--- a/drivers/irqchip/irq-mips-gic.c
+++ b/drivers/irqchip/irq-mips-gic.c
@@ -29,6 +29,7 @@ struct gic_pcpu_mask {
         DECLARE_BITMAP(pcpu_mask, GIC_MAX_INTRS);
 };
 
+static unsigned long __gic_base_addr;
 static void __iomem *gic_base;
 static struct gic_pcpu_mask pcpu_masks[NR_CPUS];
 static DEFINE_SPINLOCK(gic_lock);
@@ -301,6 +302,17 @@ int gic_get_c0_fdc_int(void)
                                   GIC_LOCAL_TO_HWIRQ(GIC_LOCAL_INT_FDC));
 }
 
+int gic_get_usm_range(struct resource *gic_usm_res)
+{
+        if (!gic_present)
+                return -1;
+
+        gic_usm_res->start = __gic_base_addr + USM_VISIBLE_SECTION_OFS;
+        gic_usm_res->end = gic_usm_res->start + (USM_VISIBLE_SECTION_SIZE - 1);
+
+        return 0;
+}
+
 static void gic_handle_shared_int(bool chained)
 {
         unsigned int i, intr, virq, gic_reg_step = mips_cm_is64 ? 8 : 4;
@@ -798,6 +810,8 @@ static void __init __gic_init(unsigned long gic_base_addr,
 {
         unsigned int gicconfig;
 
+        __gic_base_addr = gic_base_addr;
+
         gic_base = ioremap_nocache(gic_base_addr, gic_addrspace_size);
 
         gicconfig = gic_read(GIC_REG(SHARED, GIC_SH_CONFIG));