hal: renesas: ra: enable support for NMI group register

First commit to enable support for NMI group register

Signed-off-by: The Nguyen <[email protected]>

Author: thenguyenyf

drivers/ra/CMakeLists.txt

@@ -15,6 +15,7 @@ set(srcs
 	fsp/src/bsp/mcu/all/bsp_delay.c
 	fsp/src/bsp/mcu/all/bsp_register_protection.c
 	fsp/src/bsp/mcu/all/bsp_irq.c
+	fsp/src/bsp/mcu/all/bsp_group_irq.c
 )
 
 zephyr_include_directories(${include_dirs})

drivers/ra/fsp/src/bsp/mcu/all/bsp_group_irq.c

@@ -0,0 +1,117 @@
+/*
+* Copyright (c) 2020 - 2024 Renesas Electronics Corporation and/or its affiliates
+*
+* SPDX-License-Identifier: BSD-3-Clause
+*/
+
+/***********************************************************************************************************************
+ * Includes   <System Includes> , "Project Includes"
+ **********************************************************************************************************************/
+#include "bsp_api.h"
+
+/***********************************************************************************************************************
+ * Macro definitions
+ **********************************************************************************************************************/
+#define BSP_GRP_IRQ_TOTAL_ITEMS    (16U)
+
+/***********************************************************************************************************************
+ * Typedef definitions
+ **********************************************************************************************************************/
+
+/***********************************************************************************************************************
+ * Exported global variables (to be accessed by other files)
+ **********************************************************************************************************************/
+
+/***********************************************************************************************************************
+ * Private global variables and functions
+ **********************************************************************************************************************/
+
+/** This array holds callback functions. */
+bsp_grp_irq_cb_t g_bsp_group_irq_sources[BSP_GRP_IRQ_TOTAL_ITEMS] BSP_SECTION_EARLY_INIT;
+
+void        NMI_Handler(void);
+static void bsp_group_irq_call(bsp_grp_irq_t irq);
+
+/*******************************************************************************************************************//**
+ * Calls the callback function for an interrupt if a callback has been registered.
+ *
+ * @param[in]   irq         Which interrupt to check and possibly call.
+ *
+ * @retval FSP_SUCCESS              Callback was called.
+ * @retval FSP_ERR_INVALID_ARGUMENT No valid callback has been registered for this interrupt source.
+ *
+ * @warning This function is called from within an interrupt
+ **********************************************************************************************************************/
+BSP_SECTION_FLASH_GAP static void bsp_group_irq_call (bsp_grp_irq_t irq)
+{
+    /** Check for valid callback */
+    if (NULL != g_bsp_group_irq_sources[irq])
+    {
+        /** Callback has been found. Call it. */
+        g_bsp_group_irq_sources[irq](irq);
+    }
+}
+
+/*******************************************************************************************************************//**
+ * @addtogroup BSP_MCU
+ *
+ * @{
+ **********************************************************************************************************************/
+
+/*******************************************************************************************************************//**
+ * Register a callback function for supported interrupts. If NULL is passed for the callback argument then any
+ * previously registered callbacks are unregistered.
+ *
+ * @param[in]  irq          Interrupt for which  to register a callback.
+ * @param[in]  p_callback   Pointer to function to call when interrupt occurs.
+ *
+ * @retval     FSP_SUCCESS                  Callback registered
+ * @retval     FSP_ERR_ASSERTION            Callback pointer is NULL
+ **********************************************************************************************************************/
+BSP_SECTION_FLASH_GAP fsp_err_t R_BSP_GroupIrqWrite (bsp_grp_irq_t irq, void (* p_callback)(bsp_grp_irq_t irq))
+{
+#if BSP_CFG_PARAM_CHECKING_ENABLE
+
+    /* Check pointer for NULL value. */
+    FSP_ASSERT(p_callback);
+#endif
+
+    /* Register callback. */
+    g_bsp_group_irq_sources[irq] = p_callback;
+
+    return FSP_SUCCESS;
+}
+
+/*******************************************************************************************************************//**
+ * Non-maskable interrupt handler. This exception is defined by the BSP, unlike other system exceptions, because
+ * there are many sources that map to the NMI exception.
+ **********************************************************************************************************************/
+BSP_SECTION_FLASH_GAP void NMI_Handler (void)
+{
+    /* NMISR is masked by NMIER to prevent iterating over NMI status flags that are not enabled. */
+    uint16_t nmier = R_ICU->NMIER;
+    uint16_t nmisr = R_ICU->NMISR & nmier;
+
+    /* Loop over all NMI status flags */
+    for (bsp_grp_irq_t irq = BSP_GRP_IRQ_IWDT_ERROR; irq <= (bsp_grp_irq_t) (BSP_GRP_IRQ_TOTAL_ITEMS - 1); irq++)
+    {
+        /* If the current irq status register is set call the irq callback. */
+        if (0U != (nmisr & (1U << irq)))
+        {
+            (void) bsp_group_irq_call(irq);
+        }
+    }
+
+    /* Clear status flags that have been handled. */
+    R_ICU->NMICLR = nmisr;
+
+#if BSP_CFG_MCU_PART_SERIES == 8
+
+    /* Wait for NMISR to be cleared before exiting the ISR to prevent the IRQ from being regenerated.
+     * See section "13.2.12 NMICLR : Non-Maskable Interrupt Status Clear Register" in the RA8M1 manual
+     * R01UH0994EJ0100 */
+    FSP_HARDWARE_REGISTER_WAIT((R_ICU->NMISR & nmisr), 0);
+#endif
+}
+
+/** @} (end addtogroup BSP_MCU) */