GIC: Add API to get interrupt active status
API documentation updated.
Change-Id: I6d61785af0d5330930c709de971a904dc7c3516c
Co-authored-by: Yousuf A <yousuf.sait@arm.com>
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>
diff --git a/drivers/arm/gic/v3/gicv3_helpers.c b/drivers/arm/gic/v3/gicv3_helpers.c
index 73ad060..81d50ad 100644
--- a/drivers/arm/gic/v3/gicv3_helpers.c
+++ b/drivers/arm/gic/v3/gicv3_helpers.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -172,6 +172,18 @@
}
/*
+ * Accessor to set the bit corresponding to interrupt ID in GIC Re-distributor
+ * ISACTIVER0.
+ */
+unsigned int gicr_get_isactiver0(uintptr_t base, unsigned int id)
+{
+ unsigned bit_num = id & ((1 << ISACTIVER_SHIFT) - 1);
+ unsigned int reg_val = gicr_read_isactiver0(base);
+
+ return (reg_val >> bit_num) & 0x1;
+}
+
+/*
* Accessor to set the byte corresponding to interrupt ID
* in GIC Re-distributor IPRIORITYR.
*/
diff --git a/drivers/arm/gic/v3/gicv3_main.c b/drivers/arm/gic/v3/gicv3_main.c
index 7e75743..08cf095 100644
--- a/drivers/arm/gic/v3/gicv3_main.c
+++ b/drivers/arm/gic/v3/gicv3_main.c
@@ -778,3 +778,30 @@
{
return read_icc_rpr_el1();
}
+
+/*******************************************************************************
+ * This function checks if the interrupt identified by id is active (whether the
+ * state is either active, or active and pending). The proc_num is used if the
+ * interrupt is SGI or PPI and programs the corresponding Redistributor
+ * interface.
+ ******************************************************************************/
+unsigned int gicv3_get_interrupt_active(unsigned int id, unsigned int proc_num)
+{
+ unsigned int value;
+
+ assert(gicv3_driver_data);
+ assert(gicv3_driver_data->gicd_base);
+ assert(proc_num < gicv3_driver_data->rdistif_num);
+ assert(gicv3_driver_data->rdistif_base_addrs);
+ assert(id <= MAX_SPI_ID);
+
+ if (id < MIN_SPI_ID) {
+ /* For SGIs and PPIs */
+ value = gicr_get_isactiver0(
+ gicv3_driver_data->rdistif_base_addrs[proc_num], id);
+ } else {
+ value = gicd_get_isactiver(gicv3_driver_data->gicd_base, id);
+ }
+
+ return value;
+}
diff --git a/drivers/arm/gic/v3/gicv3_private.h b/drivers/arm/gic/v3/gicv3_private.h
index 59298ed..bb8ad9a 100644
--- a/drivers/arm/gic/v3/gicv3_private.h
+++ b/drivers/arm/gic/v3/gicv3_private.h
@@ -67,6 +67,7 @@
unsigned int gicd_get_igrpmodr(uintptr_t base, unsigned int id);
unsigned int gicr_get_igrpmodr0(uintptr_t base, unsigned int id);
unsigned int gicr_get_igroupr0(uintptr_t base, unsigned int id);
+unsigned int gicr_get_isactiver0(uintptr_t base, unsigned int id);
void gicd_set_igrpmodr(uintptr_t base, unsigned int id);
void gicr_set_igrpmodr0(uintptr_t base, unsigned int id);
void gicr_set_isenabler0(uintptr_t base, unsigned int id);