MLECO-3001: Reinstate handler overrides

Revived & renamed irqs.c as handlers.c
Removed reset handler and associated functions
Switched to including it as a PUBLIC source

Change-Id: Iccbd7061efcf9a1cfa9fac0fdbc2ab073d9f6150
Signed-off-by: Liam Barry <liam.barry@arm.com>

2 files changed, 156 insertions, 0 deletions

diff --git a/source/hal/cmsis_device/CMakeLists.txt b/source/hal/cmsis_device/CMakeLists.txt
index 4e5ce72..05c6005 100644
--- a/source/hal/cmsis_device/CMakeLists.txt
+++ b/source/hal/cmsis_device/CMakeLists.txt
@@ -49,6 +49,10 @@ target_include_directories(${CMSIS_DEVICE_TARGET}
 
 ## Sources
 target_sources(${CMSIS_DEVICE_TARGET}
+        PUBLIC
+        source/handlers.c)
+
+target_sources(${CMSIS_DEVICE_TARGET}
     PRIVATE
     ${CMSIS_SRC_PATH}/Device/ARM/${ARM_CPU}/Source/system_${ARM_CPU}.c
     ${CMSIS_SRC_PATH}/Device/ARM/${ARM_CPU}/Source/startup_${ARM_CPU}.c)
diff --git a/source/hal/cmsis_device/source/handlers.c b/source/hal/cmsis_device/source/handlers.c
new file mode 100644
index 0000000..ba03ee9
--- /dev/null
+++ b/source/hal/cmsis_device/source/handlers.c
@@ -0,0 +1,152 @@
+/*
+ * Copyright (c) 2021 Arm Limited. All rights reserved.
+ * 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.
+ */
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include "RTE_components.h"
+
+#include <stdio.h>
+#include <inttypes.h>
+
+/**
+ * @brief   Dump core registers on stdout
+ */
+static void LogCoreCPURegisters(void)
+{
+    printf("CTRL    : 0x%08" PRIx32 "\n", __get_CONTROL());
+    printf("IPSR    : 0x%08" PRIx32 "\n", __get_IPSR());
+    printf("APSR    : 0x%08" PRIx32 "\n", __get_APSR());
+    printf("xPSR    : 0x%08" PRIx32 "\n", __get_xPSR());
+    printf("PSP     : 0x%08" PRIx32 "\n", __get_PSP());
+    printf("MSP     : 0x%08" PRIx32 "\n", __get_MSP());
+    printf("PRIMASK : 0x%08" PRIx32 "\n", __get_PRIMASK());
+    printf("BASEPRI : 0x%08" PRIx32 "\n", __get_BASEPRI());
+    printf("FAULTMSK: 0x%08" PRIx32 "\n", __get_FAULTMASK());
+}
+
+/**
+ * @brief   Default interrupt handler - an infinite loop.
+ **/
+__attribute__((noreturn)) static void DefaultHandler(void)
+{
+    LogCoreCPURegisters();
+    while (1) {
+        /* Without the following line, armclang may optimize away the
+         * infinite loop because it'd be without side effects and thus
+         * undefined behaviour. */
+        __ASM volatile("");
+    }
+}
+
+#define DEFAULT_HANDLER_CALL(type)              \
+    do {                                        \
+        printf("\n");                           \
+        printf("%s caught by function %s\n",    \
+             type, __FUNCTION__);               \
+        DefaultHandler();                       \
+    } while (0)
+
+#define DEFAULT_ERROR_HANDLER_CALL()            \
+            DEFAULT_HANDLER_CALL("Exception")
+
+#define DEFAULT_IRQ_HANDLER_CALL()              \
+            DEFAULT_HANDLER_CALL("Interrupt")
+
+/**
+ * Placeholder Exception Handlers for core interrupts.
+ *
+ * Weak definitions provided to be used if the user chooses not
+ * to override them.
+ **/
+
+/**
+ * @brief  Non maskable interrupt handler.
+ **/
+__attribute__((weak)) void NMI_Handler(void)
+{
+    DEFAULT_ERROR_HANDLER_CALL();
+}
+
+/**
+ * @brief  Hardfault interrupt handler.
+ **/
+__attribute__((weak)) void HardFault_Handler(void)
+{
+    DEFAULT_ERROR_HANDLER_CALL();
+}
+
+/**
+ * @brief  Memory management interrupt handler.
+ **/
+__attribute__((weak)) void MemManage_Handler(void)
+{
+    DEFAULT_IRQ_HANDLER_CALL();
+}
+
+/**
+ * @brief  Bus fault interrupt handler.
+ **/
+__attribute__((weak)) void BusFault_Handler(void)
+{
+    DEFAULT_ERROR_HANDLER_CALL();
+}
+
+/**
+ * @brief  Usage fault interrupt handler.
+ **/
+__attribute__((weak)) void UsageFault_Handler(void)
+{
+    DEFAULT_ERROR_HANDLER_CALL();
+}
+
+/**
+ * @brief  Secure access fault interrupt handler.
+ **/
+__attribute__((weak)) void SecureFault_Handler(void)
+{
+    DEFAULT_ERROR_HANDLER_CALL();
+}
+
+/**
+ * @brief  Supervisor call interrupt handler.
+ **/
+__attribute__((weak)) void SVC_Handler(void)
+{
+    DEFAULT_IRQ_HANDLER_CALL();
+}
+
+/**
+ * @brief  Debug monitor interrupt handler.
+ **/
+__attribute__((weak)) void DebugMon_Handler(void)
+{
+    DEFAULT_IRQ_HANDLER_CALL();
+}
+
+/**
+ * @brief  Pending SV call interrupt handler.
+ */
+__attribute__((weak)) void PendSV_Handler(void)
+{
+    DEFAULT_IRQ_HANDLER_CALL();
+}
+
+#ifdef __cplusplus
+}
+#endif