Add power management support in the SPD

This patch implements a set of handlers in the SPD which are called by
the PSCI runtime service upon receiving a power management
operation. These handlers in turn pass control to the Secure Payload
image if required before returning control to PSCI. This ensures that
the Secure Payload has complete visibility of all power transitions in
the system and can prepare accordingly.

Change-Id: I2d1dba5629b7cf2d53999d39fe807dfcf3f62fe2

1 files changed, 3 insertions, 12 deletions

diff --git a/bl32/tsp/tsp_main.c b/bl32/tsp/tsp_main.c
index 258bee4..f6640ed 100644
--- a/bl32/tsp/tsp_main.c
+++ b/bl32/tsp/tsp_main.c
@@ -199,10 +199,7 @@ tsp_args *tsp_cpu_off_main(uint64_t arg0,
 	spin_unlock(&console_lock);
 
 
-	/*
-	 * Indicate to the SPD that we have completed
-	 * this initialisation request.
-	 */
+	/* Indicate to the SPD that we have completed this request */
 	return set_smc_args(TSP_OFF_DONE, 0, 0, 0, 0, 0, 0, 0);
 }
 
@@ -237,10 +234,7 @@ tsp_args *tsp_cpu_suspend_main(uint64_t power_state,
 	     tsp_stats[linear_id].cpu_suspend_count);
 	spin_unlock(&console_lock);
 
-	/*
-	 * Indicate to the SPD that we have completed
-	 * this initialisation request.
-	 */
+	/* Indicate to the SPD that we have completed this request */
 	return set_smc_args(TSP_SUSPEND_DONE, 0, 0, 0, 0, 0, 0, 0);
 }
 
@@ -275,10 +269,7 @@ tsp_args *tsp_cpu_resume_main(uint64_t suspend_level,
 	     tsp_stats[linear_id].cpu_suspend_count);
 	spin_unlock(&console_lock);
 
-	/*
-	 * Indicate to the SPD that we have completed
-	 * this initialisation request.
-	 */
+	/* Indicate to the SPD that we have completed this request */
 	return set_smc_args(TSP_RESUME_DONE, 0, 0, 0, 0, 0, 0, 0);
 }