添加rtthread相关代码

2025-06-13 14:38:32 +08:00
parent caf2d9f0c5
commit 160f9f8201
1809 changed files with 648100 additions and 10 deletions
--- a/riscv/rtthread/libcpu/risc-v/common/trap_common.c
+++ b/riscv/rtthread/libcpu/risc-v/common/trap_common.c
@@ -0,0 +1,112 @@
+#include <rthw.h>
+#include <rtthread.h>
+#include "riscv-ops.h"
+#include "rt_hw_stack_frame.h"
+
+#define ISR_NUMBER    32
+static volatile rt_hw_stack_frame_t *s_stack_frame;
+static struct rt_irq_desc rv32irq_table[ISR_NUMBER];
+void rt_show_stack_frame(void);
+
+/**
+ * Temporary interrupt entry function
+ *
+ * @param mcause Machine Cause Register
+ * @return RT_NULL
+ */
+rt_weak rt_isr_handler_t rt_hw_interrupt_handle(rt_uint32_t mcause)
+{
+    rt_kprintf("UN-handled interrupt %d occurred!!!\n", mcause);
+    return RT_NULL;
+}
+
+/**
+ * Interrupt entry function initialization
+ */
+rt_weak void rt_hw_interrupt_init(void)
+{
+    int idx = 0;
+
+    for (idx = 0; idx < ISR_NUMBER; idx++)
+    {
+        rv32irq_table[idx].handler = (rt_isr_handler_t)rt_hw_interrupt_handle;
+        rv32irq_table[idx].param = RT_NULL;
+    }
+}
+
+/**
+ * Break Entry Function Binding
+ *
+ * @param vector  interrupt number
+ * @param handler Break-in function requiring binding
+ * @param param   NULL
+ * @param name    NULL
+ * @return old handler
+ */
+rt_weak 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;
+    (void)param;
+    (void)name;
+
+    if(vector < ISR_NUMBER)
+    {
+        old_handler = rv32irq_table[vector].handler;
+        if (handler != RT_NULL)
+        {
+            rv32irq_table[vector].handler = (rt_isr_handler_t)handler;
+            rv32irq_table[vector].param = param;
+        }
+    }
+
+    return old_handler;
+}
+
+/**
+ * Query and Distribution Entry for Exception and Interrupt Sources
+ *
+ * @param mcause Machine Cause Register
+ */
+rt_weak void rt_rv32_system_irq_handler(rt_uint32_t mcause)
+{
+    rt_uint32_t mscratch = read_csr(0x340);
+    rt_uint32_t irq_id = (mcause & 0x1F);
+    rt_uint32_t exception = !(mcause & 0x80000000);
+    if(exception)
+    {
+        s_stack_frame = (rt_hw_stack_frame_t *)mscratch;
+        rt_show_stack_frame();
+    }
+    else
+    {
+        rv32irq_table[irq_id].handler(irq_id, rv32irq_table[irq_id].param);
+    }
+}
+
+/**
+ * Register Print on Exception
+ */
+rt_weak void rt_show_stack_frame(void)
+{
+    rt_kprintf("Stack frame:\r\n----------------------------------------\r\n");
+    rt_kprintf("ra      : 0x%08x\r\n", s_stack_frame->ra);
+    rt_kprintf("mstatus : 0x%08x\r\n", read_csr(0x300));//mstatus
+    rt_kprintf("t0      : 0x%08x\r\n", s_stack_frame->t0);
+    rt_kprintf("t1      : 0x%08x\r\n", s_stack_frame->t1);
+    rt_kprintf("t2      : 0x%08x\r\n", s_stack_frame->t2);
+    rt_kprintf("a0      : 0x%08x\r\n", s_stack_frame->a0);
+    rt_kprintf("a1      : 0x%08x\r\n", s_stack_frame->a1);
+    rt_kprintf("a2      : 0x%08x\r\n", s_stack_frame->a2);
+    rt_kprintf("a3      : 0x%08x\r\n", s_stack_frame->a3);
+    rt_kprintf("a4      : 0x%08x\r\n", s_stack_frame->a4);
+    rt_kprintf("a5      : 0x%08x\r\n", s_stack_frame->a5);
+#ifndef __riscv_32e
+    rt_kprintf("a6      : 0x%08x\r\n", s_stack_frame->a6);
+    rt_kprintf("a7      : 0x%08x\r\n", s_stack_frame->a7);
+    rt_kprintf("t3      : 0x%08x\r\n", s_stack_frame->t3);
+    rt_kprintf("t4      : 0x%08x\r\n", s_stack_frame->t4);
+    rt_kprintf("t5      : 0x%08x\r\n", s_stack_frame->t5);
+    rt_kprintf("t6      : 0x%08x\r\n", s_stack_frame->t6);
+#endif
+}