Diff: targets/TARGET_NUVOTON/TARGET_NUC472/crypto/crypto-misc.h

Revision:

181:96ed750bd169

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_NUVOTON/TARGET_NUC472/crypto/crypto-misc.h	Wed Jan 17 15:23:54 2018 +0000
@@ -0,0 +1,86 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2015-2016 Nuvoton
+ *
+ * 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.
+ */
+
+#ifndef MBED_CRYPTO_MISC_H
+#define MBED_CRYPTO_MISC_H
+
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Init/Uninit crypto module */
+void crypto_init(void);
+void crypto_uninit(void);
+
+/* Clear buffer to zero
+ * Implementation that should never be optimized out by the compiler */
+void crypto_zeroize(void *v, size_t n);
+
+/* Acquire/release ownership of AES H/W */
+/* NOTE: If "acquire" succeeds, "release" must be done to pair it. */
+bool crypto_aes_acquire(void);
+void crypto_aes_release(void);
+
+/* Acquire/release ownership of DES H/W */
+/* NOTE: If "acquire" succeeds, "release" must be done to pair it. */
+bool crypto_des_acquire(void);
+void crypto_des_release(void);
+
+/* Acquire/release ownership of SHA H/W */
+/* NOTE: If "acquire" succeeds, "release" must be done to pair it. */
+bool crypto_sha_acquire(void);
+void crypto_sha_release(void);
+
+/* Flow control between crypto/xxx start and crypto/xxx ISR 
+ *
+ * crypto_xxx_prestart/crypto_xxx_wait encapsulate control flow between crypto/xxx start and crypto/xxx ISR.
+ * 
+ * crypto_xxx_prestart will also address synchronization issue with memory barrier instruction.
+ *
+ * On finish, return of crypto_xxx_wait indicates success or not:
+ *   true if successful
+ *   false if failed
+ *
+ * Example: Start AES H/W and wait for its finish
+ *   crypto_aes_prestart();
+ *   AES_Start();
+ *   crypto_aes_wait();
+ */
+void crypto_prng_prestart(void);
+bool crypto_prng_wait(void);
+void crypto_aes_prestart(void);
+bool crypto_aes_wait(void);
+void crypto_des_prestart(void);
+bool crypto_des_wait(void);
+
+
+/* Check if buffer can be used for crypto DMA. It has the following requirements:
+ * (1) Word-aligned buffer base address
+ * (2) Crypto submodule (AES, DES, SHA, etc.) dependent buffer size alignment. Must be 2 power.
+ * (3) Located in 0x20000000-0x2FFFFFFF region
+ */
+bool crypto_dma_buff_compat(const void *buff, size_t buff_size, size_t size_aligned_to);
+
+/* Check if input/output buffers are overlapped */
+bool crypto_dma_buffs_overlap(const void *in_buff, size_t in_buff_size, const void *out_buff, size_t out_buff_size);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif