原始版本

RT_Thread/libcpu/arm/sep4020/interrupt.c

@@ -0,0 +1,131 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2006-03-13     Bernard      first version
+ * 2013-03-29     aozima       Modify the interrupt interface implementations.
+ */
+
+#include <rtthread.h>
+#include <rthw.h>
+#include <sep4020.h>
+
+#define MAX_HANDLERS    32
+
+extern rt_atomic_t rt_interrupt_nest;
+
+/* exception and interrupt handler table */
+struct rt_irq_desc isr_table[MAX_HANDLERS];
+rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread;
+rt_uint32_t rt_thread_switch_interrupt_flag;
+
+/**
+ * @addtogroup S3C24X0
+ */
+/*@{*/
+
+static void rt_hw_interrupt_handle(int vector, void *param)
+{
+    rt_kprintf("Unhandled interrupt %d occured!!!\n", vector);
+}
+
+/**
+ * This function will initialize hardware interrupt
+ */
+void rt_hw_interrupt_init(void)
+{
+    register rt_uint32_t idx;
+
+    /*Make sure all intc registers in proper state*/
+
+    /*mask all the irq*/
+    *(RP)(INTC_IMR) = 0xFFFFFFFF;
+
+    /*enable all the irq*/
+    *(RP)(INTC_IER) = 0XFFFFFFFF;
+
+    /*Dont use any forced irq*/
+    *(RP)(INTC_IFR) = 0x0;
+
+    /*Disable all the fiq*/
+    *(RP)(INTC_FIER) = 0x0;
+
+    /*Mask all the fiq*/
+    *(RP)(INTC_FIMR) = 0x0F;
+
+    /*Dont use forced fiq*/
+    *(RP)(INTC_FIFR) = 0x0;
+
+    /*Intrrupt priority register*/
+    *(RP)(INTC_IPLR) = 0x0;
+
+    /* init exceptions table */
+    rt_memset(isr_table, 0x00, sizeof(isr_table));
+    for(idx=0; idx < MAX_HANDLERS; idx++)
+    {
+        isr_table[idx].handler = rt_hw_interrupt_handle;
+    }
+
+    /* init interrupt nest, and context in thread sp */
+    rt_interrupt_nest = 0;
+    rt_interrupt_from_thread = 0;
+    rt_interrupt_to_thread = 0;
+    rt_thread_switch_interrupt_flag = 0;
+}
+
+/**
+ * This function will mask a interrupt.
+ * @param vector the interrupt number
+ */
+void rt_hw_interrupt_mask(int vector)
+{
+    *(RP)(INTC_IMR) |= 1 << vector;
+}
+
+/**
+ * This function will un-mask a interrupt.
+ * @param vector the interrupt number
+ */
+void rt_hw_interrupt_umask(int vector)
+{
+    if(vector == 16)
+    {
+        rt_kprintf("Interrupt vec %d is not used!\n", vector);
+    }
+    else
+        *(RP)(INTC_IMR) &= ~(1 << vector);
+}
+
+
+/**
+ * This function will install a interrupt service routine to a interrupt.
+ * @param vector the interrupt number
+ * @param new_handler the interrupt service routine to be installed
+ * @param old_handler the old interrupt service routine
+ */
+rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
+                                        void *param, const char *name)
+{
+    rt_isr_handler_t old_handler = RT_NULL;
+
+    if(vector < MAX_HANDLERS)
+    {
+        old_handler = isr_table[vector].handler;
+
+        if (handler != RT_NULL)
+        {
+#ifdef RT_USING_INTERRUPT_INFO
+            rt_strncpy(isr_table[vector].name, name, RT_NAME_MAX);
+#endif /* RT_USING_INTERRUPT_INFO */
+            isr_table[vector].handler = handler;
+            isr_table[vector].param = param;
+        }
+    }
+
+    return old_handler;
+}
+
+/*@}*/