Move back timing.c to mbedtls

Signed-off-by: Ronald Cron <ronald.cron@arm.com>

include/mbedtls/timing.h

@@ -0,0 +1,94 @@
+/**
+ * \file timing.h
+ *
+ * \brief Portable interface to timeouts and to the CPU cycle counter
+ */
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+ */
+#ifndef MBEDTLS_TIMING_H
+#define MBEDTLS_TIMING_H
+#include "mbedtls/private_access.h"
+
+#include "mbedtls/build_info.h"
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if !defined(MBEDTLS_TIMING_ALT)
+// Regular implementation
+//
+
+/**
+ * \brief          timer structure
+ */
+struct mbedtls_timing_hr_time {
+    uint64_t MBEDTLS_PRIVATE(opaque)[4];
+};
+
+/**
+ * \brief          Context for mbedtls_timing_set/get_delay()
+ */
+typedef struct mbedtls_timing_delay_context {
+    struct mbedtls_timing_hr_time   MBEDTLS_PRIVATE(timer);
+    uint32_t                        MBEDTLS_PRIVATE(int_ms);
+    uint32_t                        MBEDTLS_PRIVATE(fin_ms);
+} mbedtls_timing_delay_context;
+
+#else  /* MBEDTLS_TIMING_ALT */
+#include "timing_alt.h"
+#endif /* MBEDTLS_TIMING_ALT */
+
+/* Internal use */
+unsigned long mbedtls_timing_get_timer(struct mbedtls_timing_hr_time *val, int reset);
+
+/**
+ * \brief          Set a pair of delays to watch
+ *                 (See \c mbedtls_timing_get_delay().)
+ *
+ * \param data     Pointer to timing data.
+ *                 Must point to a valid \c mbedtls_timing_delay_context struct.
+ * \param int_ms   First (intermediate) delay in milliseconds.
+ *                 The effect if int_ms > fin_ms is unspecified.
+ * \param fin_ms   Second (final) delay in milliseconds.
+ *                 Pass 0 to cancel the current delay.
+ *
+ * \note           To set a single delay, either use \c mbedtls_timing_set_timer
+ *                 directly or use this function with int_ms == fin_ms.
+ */
+void mbedtls_timing_set_delay(void *data, uint32_t int_ms, uint32_t fin_ms);
+
+/**
+ * \brief          Get the status of delays
+ *                 (Memory helper: number of delays passed.)
+ *
+ * \param data     Pointer to timing data
+ *                 Must point to a valid \c mbedtls_timing_delay_context struct.
+ *
+ * \return         -1 if cancelled (fin_ms = 0),
+ *                  0 if none of the delays are passed,
+ *                  1 if only the intermediate delay is passed,
+ *                  2 if the final delay is passed.
+ */
+int mbedtls_timing_get_delay(void *data);
+
+/**
+ * \brief          Get the final timing delay
+ *
+ * \param data     Pointer to timing data
+ *                 Must point to a valid \c mbedtls_timing_delay_context struct.
+ *
+ * \return         Final timing delay in milliseconds.
+ */
+uint32_t mbedtls_timing_get_final_delay(
+    const mbedtls_timing_delay_context *data);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* timing.h */