/****************************************************************************

Copyright(c) 2019 by Aerospace C.Power (Chongqing) Microelectronics. ALL RIGHTS RESERVED.

This Information is proprietary to Aerospace C.Power (Chongqing) Microelectronics and MAY NOT
be copied by any method or incorporated into another program without
the express written consent of Aerospace C.Power. This Information or any portion
thereof remains the property of Aerospace C.Power. The Information contained herein
is believed to be accurate and Aerospace C.Power assumes no responsibility or
liability for its use in any way and conveys no license or title under
any patent or copyright and makes no representation or warranty that this
Information is free from patent or copyright infringement.

****************************************************************************/
/* os shim includes */
#include "os_types.h"
#include "os_task.h"
#include "os_utils.h"

/* common includes */
#include "iot_io.h"
#include "iot_bitops.h"
#include "iot_pkt_api.h"
#include "iot_ipc.h"
#include "iot_plc_lib.h"
#include "iot_dbglog_api.h"
#include "iot_config.h"

/* driver includes */
#include "iot_clock.h"
#include "iot_uart.h"

/* cli includes */
#include "iot_cli.h"

/* debug includes*/
#include "dbg_io.h"

typedef void (*jump)(void);

void div_zero()
{
    int a = 0;
    int b = 1;
    int c;
    c = b/a;
    iot_printf("div zero : c=%d\r\n", c);
}

void invalid_addr_access()  // mcause: 5/7 load/store address fault
{
    int *buf = (int *)0x90000000;
    //*buf = 0xaabbccdd;
    iot_printf("align test a: %08x\r\n", *(buf));
}

void misalign_access()    // mcause: 4/6 load/store address misaligned
{
    uint32_t *a = (uint32_t *) 0x1003ffd1;
    //*a = 0xaabb;
    //*(a+1) = 0xccdd;
    iot_printf("align test a: %08x\r\n", *(a));
    iot_printf("align test a: %08x\r\n", *(a+1));
}

void instruction_illegal()   // mcause: 2  illegal instruction
{
    void (*pgm_start)(void) = (void*) 0x001003d1;
    pgm_start();
}

void invalid_instruction_access()  // mcause: 1 instruction fault
{
    void (*pgm_start)(void) = (void*) 0x80000040;
    pgm_start();
}

void instruction_misalign()
{
    int a = 10;
    iot_printf("a=%d\n", a);
}


void back_d()
{
    iot_printf("back 4.......\r\n");
    misalign_access();
}

struct test_t {
    void (*callback)(void);
};

struct test_t g_test = {0};

void back_c()
{
    iot_printf("back 3.......\r\n");
    g_test.callback = back_d;
    g_test.callback();
}

void back_b()
{
    iot_printf("back 2.......\r\n");
    back_c();
}

void back_a()
{
    iot_printf("back 1.......\r\n");
    back_b();
}

void trap_back_test()
{
    back_a();
}

int main(void)
{
  dbg_uart_init();
   int i = 100;
   int a = 100;
   int b = 10;
   int c = 100;
   int d = 100;
   iot_printf("%d %d %d %d %d\r\n", a,b,c,d,i);

   //trap_back_test();

  int j = 0;
   while(i)
   {
        //div_zero();
        //invalid_instruction_access();  // mcause: 1
        //instruction_illegal();          // mcause: 2
        //misalign_access();            // mcause: 6
        //invalid_addr_access();        // mcause: 7
        //instruction_misalign();
        
        iot_printf("count i: %d\r\n", i);

        for(j = 0; j<10000;j++);
        i--;
   }
   return 0;
}