108 lines
3.1 KiB
C
108 lines
3.1 KiB
C
#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 NULL
|
|
*/
|
|
rt_weak rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
|
|
void *param, const char *name)
|
|
{
|
|
void *user_param = param;
|
|
char *user_name = name;
|
|
if(vector < ISR_NUMBER)
|
|
{
|
|
if (handler != RT_NULL)
|
|
{
|
|
rv32irq_table[vector].handler = (rt_isr_handler_t)handler;
|
|
rv32irq_table[vector].param = param;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
}
|