ARM: PSCI: Add helper functions to access per-CPU target PC storage

[u-boot] / arch / arm / cpu / armv7 / psci-common.c

diff --git a/arch/arm/cpu/armv7/psci-common.c b/arch/arm/cpu/armv7/psci-common.c
new file mode 100644 (file)
index 0000000..d14b693
--- /dev/null
+++ b/arch/arm/cpu/armv7/psci-common.c
@@ -0,0 +1,39 @@
+/*
+ * Common PSCI functions
+ *
+ * Copyright (C) 2016 Chen-Yu Tsai
+ * Author: Chen-Yu Tsai <wens@csie.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <asm/armv7.h>
+#include <asm/macro.h>
+#include <asm/psci.h>
+#include <asm/secure.h>
+#include <linux/linkage.h>
+
+static u32 psci_target_pc[CONFIG_ARMV7_PSCI_NR_CPUS] __secure_data = { 0 };
+
+void __secure psci_save_target_pc(int cpu, u32 pc)
+{
+       psci_target_pc[cpu] = pc;
+       DSB;
+}
+
+u32 __secure psci_get_target_pc(int cpu)
+{
+       return psci_target_pc[cpu];
+}
+