Import Mbed OS hard-float snapshot

targets/TARGET_NUVOTON/TARGET_M2351/sleep.c

@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2017-2018, Nuvoton Technology Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "sleep_api.h"
+
+#if DEVICE_SLEEP
+
+#include "cmsis.h"
+#include "device.h"
+#include "objects.h"
+#include "PeripheralPins.h"
+#include "platform/mbed_toolchain.h"
+#include <stdbool.h>
+
+/* Merge SYS_UnlockReg_S()/CLK_Idle_S() or CLK_PowerDown_S()/SYS_LockReg_S()
+ * into nu_idle_s() or nu_powerdown_s()
+ *
+ * These APIs are secure calls. For performance, merge them into one when
+ * nu_idle_s() and nu_powerdown_s() are available.
+ */
+MBED_WEAK void nu_idle_s(void);
+MBED_WEAK void nu_powerdown_s(void);
+
+#if DEVICE_SERIAL
+bool serial_can_deep_sleep(void);
+#endif
+
+/**
+ * Enter idle mode, in which just CPU is halted.
+ */
+void hal_sleep(void)
+{
+#if defined (__ARM_FEATURE_CMSE) && (__ARM_FEATURE_CMSE == 3U)
+    SYS_UnlockReg();
+    CLK_Idle();
+    SYS_LockReg();
+#else
+    if (nu_idle_s) {
+        nu_idle_s();
+    } else {
+        SYS_UnlockReg_S();
+        CLK_Idle_S();
+        SYS_LockReg_S();
+    }
+#endif
+}
+
+/**
+ * Enter power-down mode, in which HXT/HIRC are halted.
+ */
+void hal_deepsleep(void)
+{
+#if DEVICE_SERIAL
+    if (!serial_can_deep_sleep()) {
+        return;
+    }
+#endif
+
+#if defined (__ARM_FEATURE_CMSE) && (__ARM_FEATURE_CMSE == 3U)
+    SYS_UnlockReg();
+    CLK_PowerDown();
+    SYS_LockReg();
+#else
+    if (nu_powerdown_s) {
+        nu_powerdown_s();
+    } else {
+        SYS_UnlockReg_S();
+        CLK_PowerDown_S();
+        SYS_LockReg_S();
+    }
+#endif
+}
+
+#endif