GIC: Add API to get running priority
Document the API in separate platform interrupt controller API document.
Change-Id: If18f208e10a8a243f5c59d226fcf48e985941949
Co-authored-by: Yousuf A <yousuf.sait@arm.com>
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>
diff --git a/drivers/arm/gic/v2/gicv2_main.c b/drivers/arm/gic/v2/gicv2_main.c
index deac927..7759a55 100644
--- a/drivers/arm/gic/v2/gicv2_main.c
+++ b/drivers/arm/gic/v2/gicv2_main.c
@@ -240,3 +240,15 @@
return gicd_get_igroupr(driver_data->gicd_base, id);
}
+
+/*******************************************************************************
+ * This function returns the priority of the interrupt the processor is
+ * currently servicing.
+ ******************************************************************************/
+unsigned int gicv2_get_running_priority(void)
+{
+ assert(driver_data);
+ assert(driver_data->gicc_base);
+
+ return gicc_read_rpr(driver_data->gicc_base);
+}
diff --git a/drivers/arm/gic/v2/gicv2_private.h b/drivers/arm/gic/v2/gicv2_private.h
index 91ab43a..7703cbe 100644
--- a/drivers/arm/gic/v2/gicv2_private.h
+++ b/drivers/arm/gic/v2/gicv2_private.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -80,6 +80,11 @@
return mmio_read_32(base + GICC_IIDR);
}
+static inline unsigned int gicc_read_rpr(uintptr_t base)
+{
+ return mmio_read_32(base + GICC_RPR);
+}
+
/*******************************************************************************
* GIC CPU interface accessors for writing entire registers
******************************************************************************/
diff --git a/drivers/arm/gic/v3/gicv3_main.c b/drivers/arm/gic/v3/gicv3_main.c
index 1a018d8..7e75743 100644
--- a/drivers/arm/gic/v3/gicv3_main.c
+++ b/drivers/arm/gic/v3/gicv3_main.c
@@ -769,3 +769,12 @@
gicd_wait_for_pending_write(gicd_base);
}
+
+/*******************************************************************************
+ * This function gets the priority of the interrupt the processor is currently
+ * servicing.
+ ******************************************************************************/
+unsigned int gicv3_get_running_priority(void)
+{
+ return read_icc_rpr_el1();
+}