u-boot测试程序

/*
 * uboot go test
 */

//typedef void (*pr)(const char *fmt, ...);
//void (*pr)(const char *fmt, ...)=0x778137b8;
void (*pr)(const char *fmt, ...)=0xa7f8aef4;
void (*pc)(char fmt) = 0xa7f8aeb0;  /*find in u-boot.map */
void (*puts)(const char *s)=0xa7f8aed8;
void (*udelay)(unsigned long usec)=0xa7f80ed4;
int add(int a, int b);
int rd8(int addr);
void wr8(int addr,char val);

//int g_val = 0;

int main(int argc, char **argv)
{
    int i = 0;
int g_val = 0;
    //pr print = (pr)0x0x778137b8; 
    /*pxa timer*/
    *(int*)(0x40A000C0) =  0x8c;
    *(int*)(0x40A00080) =  0x0AFFFFF;
    *(int*)(0x40A00040) =  0x0;

    pc('h');
    pc('e');
    pc('l');
    pc('l');
    pc('o');
    pc(',');
    pc('s');
    pc('b');
    pc('s');
    pc('!');

    for(i=10; i>0; i--)
    {
        puts("\nSBS");
         g_val += i;
         pr(" i(%d)+g_val(%d) = %d\n",i, g_val, add(i,g_val));
         udelay(1000*1000);
    }
    pr("hello wolrd----i=%d\n",i);
    pr("g_val addr is 0x%x\n", &g_val);
    g_val = *(int*)0x40A00040;
    pr("timer is %d\n", g_val);
    return 0;
}

int add(int a, int b)
{
    return a+b;
}