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/***************************************************************************/
/* Copyright (c) 2024 Microsoft Corporation */
/* Copyright (c) 2026 Eclipse ThreadX contributors */
/* */
/* This program and the accompanying materials are made available under */
/* the terms of the MIT License which is available at */
/* https://opensource.org/licenses/MIT. */
/* */
/* SPDX-License-Identifier: MIT */
/***************************************************************************/
#include "csr.h"
#include <stdint.h>
#include "uart.h"
#include "hwtimer.h"
#include "plic.h"
#include <tx_port.h>
#include <tx_api.h>
#define OS_IS_INTERUPT(mcause) (mcause & 0x80000000u)
#define OS_IS_EXCEPTION(mcause) (~(OS_IS_INTERUPT))
#define OS_IS_TICK_INT(mcause) (mcause == 0x80000007u)
#define OS_IS_SOFT_INT(mcause) (mcause == 0x80000003u)
#define OS_IS_EXT_INT(mcause) (mcause == 0x8000000bu)
#define OS_IS_TRAP_USER(mcause) (mcause == 0x0000000bu)
extern void _tx_timer_interrupt(void);
extern int uart_putc(int ch);
static void print_hex(uintptr_t val)
{
char digits[] = "0123456789ABCDEF";
uart_putc('0');
uart_putc('x');
for(int i = (sizeof(uintptr_t)*2) - 1; i >= 0; i--) {
int d = (val >> (i*4)) & 0xF;
uart_putc(digits[d]);
}
uart_putc('\n');
}
void trap_handler(uintptr_t mcause, uintptr_t mepc, uintptr_t mtval)
{
if(OS_IS_INTERUPT(mcause))
{
if(OS_IS_TICK_INT(mcause))
{
hwtimer_handler();
_tx_timer_interrupt();
}
else if(OS_IS_EXT_INT(mcause))
{
int ret = plic_irq_intr();
if(ret)
{
puts("[INTERRUPT]: handler irq error!");
while(1) ;
}
}
else
{
puts("[INTERRUPT]: now can't deal with the interrupt!");
while(1) ;
}
}
else
{
puts("[EXCEPTION] : Unkown Error!!");
puts("mcause:");
print_hex(mcause);
puts("mepc:");
print_hex(mepc);
puts("mtval:");
print_hex(mtval);
while(1) ;
}
}
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