113 lines
3.2 KiB
C
113 lines
3.2 KiB
C
#include <rthw.h>
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#include <rtthread.h>
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#include "riscv-ops.h"
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#include "rt_hw_stack_frame.h"
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#define ISR_NUMBER 32
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static volatile rt_hw_stack_frame_t *s_stack_frame;
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static struct rt_irq_desc rv32irq_table[ISR_NUMBER];
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void rt_show_stack_frame(void);
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/**
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* Temporary interrupt entry function
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*
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* @param mcause Machine Cause Register
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* @return RT_NULL
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*/
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rt_weak rt_isr_handler_t rt_hw_interrupt_handle(rt_uint32_t mcause)
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{
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rt_kprintf("UN-handled interrupt %d occurred!!!\n", mcause);
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return RT_NULL;
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}
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/**
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* Interrupt entry function initialization
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*/
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rt_weak void rt_hw_interrupt_init(void)
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{
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int idx = 0;
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for (idx = 0; idx < ISR_NUMBER; idx++)
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{
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rv32irq_table[idx].handler = (rt_isr_handler_t)rt_hw_interrupt_handle;
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rv32irq_table[idx].param = RT_NULL;
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}
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}
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/**
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* Break Entry Function Binding
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*
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* @param vector interrupt number
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* @param handler Break-in function requiring binding
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* @param param NULL
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* @param name NULL
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* @return old handler
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*/
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rt_weak rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
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void *param, const char *name)
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{
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rt_isr_handler_t old_handler = RT_NULL;
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void *user_param = param;
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char *user_name = name;
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if(vector < ISR_NUMBER)
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{
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old_handler = rv32irq_table[vector].handler;
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if (handler != RT_NULL)
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{
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rv32irq_table[vector].handler = (rt_isr_handler_t)handler;
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rv32irq_table[vector].param = param;
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}
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}
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return old_handler;
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}
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/**
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* Query and Distribution Entry for Exception and Interrupt Sources
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*
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* @param mcause Machine Cause Register
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*/
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rt_weak void rt_rv32_system_irq_handler(rt_uint32_t mcause)
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{
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rt_uint32_t mscratch = read_csr(0x340);
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rt_uint32_t irq_id = (mcause & 0x1F);
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rt_uint32_t exception = !(mcause & 0x80000000);
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if(exception)
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{
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s_stack_frame = (rt_hw_stack_frame_t *)mscratch;
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rt_show_stack_frame();
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}
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else
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{
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rv32irq_table[irq_id].handler(irq_id, rv32irq_table[irq_id].param);
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}
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}
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/**
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* Register Print on Exception
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*/
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rt_weak void rt_show_stack_frame(void)
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{
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rt_kprintf("Stack frame:\r\n----------------------------------------\r\n");
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rt_kprintf("ra : 0x%08x\r\n", s_stack_frame->ra);
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rt_kprintf("mstatus : 0x%08x\r\n", read_csr(0x300));//mstatus
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rt_kprintf("t0 : 0x%08x\r\n", s_stack_frame->t0);
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rt_kprintf("t1 : 0x%08x\r\n", s_stack_frame->t1);
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rt_kprintf("t2 : 0x%08x\r\n", s_stack_frame->t2);
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rt_kprintf("a0 : 0x%08x\r\n", s_stack_frame->a0);
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rt_kprintf("a1 : 0x%08x\r\n", s_stack_frame->a1);
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rt_kprintf("a2 : 0x%08x\r\n", s_stack_frame->a2);
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rt_kprintf("a3 : 0x%08x\r\n", s_stack_frame->a3);
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rt_kprintf("a4 : 0x%08x\r\n", s_stack_frame->a4);
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rt_kprintf("a5 : 0x%08x\r\n", s_stack_frame->a5);
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#ifndef __riscv_32e
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rt_kprintf("a6 : 0x%08x\r\n", s_stack_frame->a6);
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rt_kprintf("a7 : 0x%08x\r\n", s_stack_frame->a7);
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rt_kprintf("t3 : 0x%08x\r\n", s_stack_frame->t3);
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rt_kprintf("t4 : 0x%08x\r\n", s_stack_frame->t4);
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rt_kprintf("t5 : 0x%08x\r\n", s_stack_frame->t5);
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rt_kprintf("t6 : 0x%08x\r\n", s_stack_frame->t6);
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#endif
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}
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