From 710b9d228b3a09664df9f53ef5b83a1262306980 Mon Sep 17 00:00:00 2001
From: "harshal.patil" <harshal.patil@espressif.com>
Date: Wed, 20 Sep 2023 09:58:10 +0530
Subject: [PATCH] feat(esp_hw_support): Add esp_crypto_lock layer for esp32c2

---
 .../include/soc/esp32c2/esp_crypto_lock.h     | 27 +++++++++++++++++++
 .../port/esp32c2/CMakeLists.txt               |  3 ++-
 .../port/esp32c2/esp_crypto_lock.c            | 26 ++++++++++++++++++
 3 files changed, 55 insertions(+), 1 deletion(-)
 create mode 100644 components/esp_hw_support/include/soc/esp32c2/esp_crypto_lock.h
 create mode 100644 components/esp_hw_support/port/esp32c2/esp_crypto_lock.c

diff --git a/components/esp_hw_support/include/soc/esp32c2/esp_crypto_lock.h b/components/esp_hw_support/include/soc/esp32c2/esp_crypto_lock.h
new file mode 100644
index 0000000000..09d4f295f8
--- /dev/null
+++ b/components/esp_hw_support/include/soc/esp32c2/esp_crypto_lock.h
@@ -0,0 +1,27 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Acquire lock for the ECC cryptography peripheral.
+ *
+ */
+void esp_crypto_ecc_lock_acquire(void);
+
+/**
+ * @brief Release lock for the ECC cryptography peripheral.
+ *
+ */
+void esp_crypto_ecc_lock_release(void);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/components/esp_hw_support/port/esp32c2/CMakeLists.txt b/components/esp_hw_support/port/esp32c2/CMakeLists.txt
index d0774a5029..482f65e4f4 100644
--- a/components/esp_hw_support/port/esp32c2/CMakeLists.txt
+++ b/components/esp_hw_support/port/esp32c2/CMakeLists.txt
@@ -7,7 +7,8 @@ set(srcs "rtc_clk_init.c"
 
 if(NOT BOOTLOADER_BUILD)
 
-    list(APPEND srcs "sar_periph_ctrl.c")
+    list(APPEND srcs "esp_crypto_lock.c"
+                     "sar_periph_ctrl.c")
 
 endif()
 
diff --git a/components/esp_hw_support/port/esp32c2/esp_crypto_lock.c b/components/esp_hw_support/port/esp32c2/esp_crypto_lock.c
new file mode 100644
index 0000000000..53a2500a47
--- /dev/null
+++ b/components/esp_hw_support/port/esp32c2/esp_crypto_lock.c
@@ -0,0 +1,26 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <sys/lock.h>
+
+#include "esp_crypto_lock.h"
+
+/* Lock overview:
+ECC: independent
+*/
+
+/* Lock for ECC peripheral */
+static _lock_t s_crypto_ecc_lock;
+
+void esp_crypto_ecc_lock_acquire(void)
+{
+    _lock_acquire(&s_crypto_ecc_lock);
+}
+
+void esp_crypto_ecc_lock_release(void)
+{
+    _lock_release(&s_crypto_ecc_lock);
+}