/*
 * 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
 * 2006-05-27     Bernard      add skyeye support
 * 2007-11-19     Yi.Qiu       fix rt_hw_trap_irq function
 * 2013-03-29     aozima       Modify the interrupt interface implementations.
 */

#include <rtthread.h>
#include <rthw.h>

#include <sep4020.h>

/**
 * @addtogroup S3C24X0
 */
/*@{*/

extern struct rt_thread *rt_current_thread;

/**
 * this function will show registers of CPU
 *
 * @param regs the registers point
 */

void rt_hw_show_register (struct rt_hw_register *regs)
{
    rt_kprintf("Execption:\n");
    rt_kprintf("r00:0x%08x r01:0x%08x r02:0x%08x r03:0x%08x\n", regs->r0, regs->r1, regs->r2, regs->r3);
    rt_kprintf("r04:0x%08x r05:0x%08x r06:0x%08x r07:0x%08x\n", regs->r4, regs->r5, regs->r6, regs->r7);
    rt_kprintf("r08:0x%08x r09:0x%08x r10:0x%08x\n", regs->r8, regs->r9, regs->r10);
    rt_kprintf("fp :0x%08x ip :0x%08x\n", regs->fp, regs->ip);
    rt_kprintf("sp :0x%08x lr :0x%08x pc :0x%08x\n", regs->sp, regs->lr, regs->pc);
    rt_kprintf("cpsr:0x%08x\n", regs->cpsr);
}

/**
 * When ARM7TDMI comes across an instruction which it cannot handle,
 * it takes the undefined instruction trap.
 *
 * @param regs system registers
 *
 * @note never invoke this function in application
 */
void rt_hw_trap_udef(struct rt_hw_register *regs)
{
    rt_hw_show_register(regs);

    rt_kprintf("undefined instruction\n");
    rt_kprintf("thread - %s stack:\n", rt_current_thread->parent.name);
    rt_hw_backtrace((rt_uint32_t *)regs->fp, (rt_uint32_t)rt_current_thread->entry);

    rt_hw_cpu_shutdown();
}

/**
 * The software interrupt instruction (SWI) is used for entering
 * Supervisor mode, usually to request a particular supervisor
 * function.
 *
 * @param regs system registers
 *
 * @note never invoke this function in application
 */
void rt_hw_trap_swi(struct rt_hw_register *regs)
{
    rt_hw_show_register(regs);

    rt_kprintf("software interrupt\n");
    rt_hw_cpu_shutdown();
}

/**
 * An abort indicates that the current memory access cannot be completed,
 * which occurs during an instruction prefetch.
 *
 * @param regs system registers
 *
 * @note never invoke this function in application
 */
void rt_hw_trap_pabt(struct rt_hw_register *regs)
{
    rt_hw_show_register(regs);

    rt_kprintf("prefetch abort\n");
    rt_kprintf("thread - %s stack:\n", rt_current_thread->parent.name);
    rt_hw_backtrace((rt_uint32_t *)regs->fp, (rt_uint32_t)rt_current_thread->entry);

    rt_hw_cpu_shutdown();
}

/**
 * An abort indicates that the current memory access cannot be completed,
 * which occurs during a data access.
 *
 * @param regs system registers
 *
 * @note never invoke this function in application
 */
void rt_hw_trap_dabt(struct rt_hw_register *regs)
{
    rt_hw_show_register(regs);

    rt_kprintf("data abort\n");
    rt_kprintf("thread - %s stack:\n", rt_current_thread->parent.name);
    rt_hw_backtrace((rt_uint32_t *)regs->fp, (rt_uint32_t)rt_current_thread->entry);

    rt_hw_cpu_shutdown();
}

/**
 * Normally, system will never reach here
 *
 * @param regs system registers
 *
 * @note never invoke this function in application
 */
void rt_hw_trap_resv(struct rt_hw_register *regs)
{
    rt_kprintf("not used\n");
    rt_hw_show_register(regs);
    rt_hw_cpu_shutdown();
}

extern struct rt_irq_desc isr_table[];

void rt_hw_trap_irq(void)
{
    unsigned long intstat;
    rt_uint32_t irq = 0;
    rt_isr_handler_t isr_func;
    void *param;

    /*Get the final intrrupt source*/
    intstat = *(RP)(INTC_IFSR);;

    /*Shift to get the intrrupt number*/
    while(intstat != 1)
    {
        intstat = intstat >> 1;
        irq++;
    }

    /* get interrupt service routine */
    isr_func = isr_table[irq].handler;
    param = isr_table[irq].param;

    /* turn to interrupt service routine */
    isr_func(irq, param);

#ifdef RT_USING_INTERRUPT_INFO
    isr_table[irq].counter++;
#endif /* RT_USING_INTERRUPT_INFO */
}

void rt_hw_trap_fiq(void)
{
    rt_kprintf("fast interrupt request\n");
}

/*@}*/