GIC: Add API to raise secure SGI
API documentation updated.
Change-Id: I129725059299af6cc612bafa8d74817f779d7c4f
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 8048c6a..b59e458 100644
--- a/drivers/arm/gic/v2/gicv2_main.c
+++ b/drivers/arm/gic/v2/gicv2_main.c
@@ -368,3 +368,38 @@
}
spin_unlock(&gic_lock);
}
+
+/*******************************************************************************
+ * This function raises the specified SGI to requested targets.
+ *
+ * The proc_num parameter must be the linear index of the target PE in the
+ * system.
+ ******************************************************************************/
+void gicv2_raise_sgi(int sgi_num, int proc_num)
+{
+ unsigned int sgir_val, target;
+
+ assert(driver_data);
+ assert(proc_num < GICV2_MAX_TARGET_PE);
+ assert(driver_data->gicd_base);
+
+ /*
+ * Target masks array must have been supplied, and the core position
+ * should be valid.
+ */
+ assert(driver_data->target_masks);
+ assert(proc_num < driver_data->target_masks_num);
+
+ /* Don't raise SGI if the mask hasn't been populated */
+ target = driver_data->target_masks[proc_num];
+ assert(target != 0);
+
+ sgir_val = GICV2_SGIR_VALUE(SGIR_TGT_SPECIFIC, target, sgi_num);
+
+ /*
+ * Ensure that any shared variable updates depending on out of band
+ * interrupt trigger are observed before raising SGI.
+ */
+ dsbishst();
+ gicd_write_sgir(driver_data->gicd_base, sgir_val);
+}