Add support for PSCI SYSTEM_OFF and SYSTEM_RESET APIs

This patch adds support for SYSTEM_OFF and SYSTEM_RESET PSCI
operations. A platform should export handlers to complete the
requested operation. The FVP port exports fvp_system_off() and
fvp_system_reset() as an example.

If the SPD provides a power management hook for system off and
system reset, then the SPD is notified about the corresponding
operation so it can do some bookkeeping. The TSPD exports
tspd_system_off() and tspd_system_reset() for that purpose.

Versatile Express shutdown and reset methods have been removed
from the FDT as new PSCI sys_poweroff and sys_reset services
have been added. For those kernels that do not support yet these
PSCI services (i.e. GICv3 kernel), the original dtsi files have
been renamed to *-no_psci.dtsi.

Fixes ARM-software/tf-issues#218

Change-Id: Ic8a3bf801db979099ab7029162af041c4e8330c8

1 files changed, 77 insertions, 0 deletions

diff --git a/services/std_svc/psci/psci_system_off.c b/services/std_svc/psci/psci_system_off.c
new file mode 100644
index 00000000..f2520b6d
--- /dev/null
+++ b/services/std_svc/psci/psci_system_off.c
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2014, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stddef.h>
+#include <arch_helpers.h>
+#include <debug.h>
+#include <platform.h>
+#include "psci_private.h"
+
+void psci_system_off(void)
+{
+	/* Check platform support */
+	if (!psci_plat_pm_ops->system_off) {
+		ERROR("Platform has not exported a PSCI System Off hook.\n");
+		panic();
+	}
+
+	psci_print_affinity_map();
+
+	/* Notify the Secure Payload Dispatcher */
+	if (psci_spd_pm && psci_spd_pm->svc_system_off) {
+		psci_spd_pm->svc_system_off();
+	}
+
+	/* Call the platform specific hook */
+	psci_plat_pm_ops->system_off();
+
+	/* This function does not return. We should never get here */
+}
+
+void psci_system_reset(void)
+{
+	/* Check platform support */
+	if (!psci_plat_pm_ops->system_reset) {
+		ERROR("Platform has not exported a PSCI System Reset hook.\n");
+		panic();
+	}
+
+	psci_print_affinity_map();
+
+	/* Notify the Secure Payload Dispatcher */
+	if (psci_spd_pm && psci_spd_pm->svc_system_reset) {
+		psci_spd_pm->svc_system_reset();
+	}
+
+	/* Call the platform specific hook */
+	psci_plat_pm_ops->system_reset();
+
+	/* This function does not return. We should never get here */
+}