GIC: Add APIs to enable and disable interrupt
API documentation updated.
Change-Id: Ice7511f8df5356851001d2f7dc2a46cfe318f9ba
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 81d50ad..ee874f9 100644
--- a/drivers/arm/gic/v3/gicv3_helpers.c
+++ b/drivers/arm/gic/v3/gicv3_helpers.c
@@ -173,6 +173,17 @@
/*
* Accessor to set the bit corresponding to interrupt ID in GIC Re-distributor
+ * ICENABLER0.
+ */
+void gicr_set_icenabler0(uintptr_t base, unsigned int id)
+{
+ unsigned bit_num = id & ((1 << ICENABLER_SHIFT) - 1);
+
+ gicr_write_icenabler0(base, (1 << bit_num));
+}
+
+/*
+ * 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)
diff --git a/drivers/arm/gic/v3/gicv3_main.c b/drivers/arm/gic/v3/gicv3_main.c
index 08cf095..b323199 100644
--- a/drivers/arm/gic/v3/gicv3_main.c
+++ b/drivers/arm/gic/v3/gicv3_main.c
@@ -805,3 +805,67 @@
return value;
}
+
+/*******************************************************************************
+ * This function enables the interrupt identified by id. The proc_num
+ * is used if the interrupt is SGI or PPI, and programs the corresponding
+ * Redistributor interface.
+ ******************************************************************************/
+void gicv3_enable_interrupt(unsigned int id, unsigned int proc_num)
+{
+ 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);
+
+ /*
+ * Ensure that any shared variable updates depending on out of band
+ * interrupt trigger are observed before enabling interrupt.
+ */
+ dsbishst();
+ if (id < MIN_SPI_ID) {
+ /* For SGIs and PPIs */
+ gicr_set_isenabler0(
+ gicv3_driver_data->rdistif_base_addrs[proc_num],
+ id);
+ } else {
+ gicd_set_isenabler(gicv3_driver_data->gicd_base, id);
+ }
+}
+
+/*******************************************************************************
+ * This function disables the interrupt identified by id. The proc_num
+ * is used if the interrupt is SGI or PPI, and programs the corresponding
+ * Redistributor interface.
+ ******************************************************************************/
+void gicv3_disable_interrupt(unsigned int id, unsigned int proc_num)
+{
+ 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);
+
+ /*
+ * Disable interrupt, and ensure that any shared variable updates
+ * depending on out of band interrupt trigger are observed afterwards.
+ */
+ if (id < MIN_SPI_ID) {
+ /* For SGIs and PPIs */
+ gicr_set_icenabler0(
+ gicv3_driver_data->rdistif_base_addrs[proc_num],
+ id);
+
+ /* Write to clear enable requires waiting for pending writes */
+ gicr_wait_for_pending_write(
+ gicv3_driver_data->rdistif_base_addrs[proc_num]);
+ } else {
+ gicd_set_icenabler(gicv3_driver_data->gicd_base, id);
+
+ /* Write to clear enable requires waiting for pending writes */
+ gicd_wait_for_pending_write(gicv3_driver_data->gicd_base);
+ }
+
+ dsbishst();
+}
diff --git a/drivers/arm/gic/v3/gicv3_private.h b/drivers/arm/gic/v3/gicv3_private.h
index bb8ad9a..19fce2e 100644
--- a/drivers/arm/gic/v3/gicv3_private.h
+++ b/drivers/arm/gic/v3/gicv3_private.h
@@ -71,6 +71,7 @@
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);
+void gicr_set_icenabler0(uintptr_t base, unsigned int id);
void gicr_set_igroupr0(uintptr_t base, unsigned int id);
void gicd_clr_igrpmodr(uintptr_t base, unsigned int id);
void gicr_clr_igrpmodr0(uintptr_t base, unsigned int id);