keil 下模拟u-boot的cmd功能

主要实现CMD命令专门分布在一个段内

(转载请注明出处，Dreamxi嵌入式  http://www.cnblogs.com/Dreamxi/p/3507932.html )

代码如下：

 typedef struct __init_cmd {  
        char        *name;      /* Command Name         */  
        void     (*cmd)(void);  
    }init_cmd_t;
#define Struct_Section  __attribute__ ((used,section("INIT_CMD"))) 
#define INIT_CMD(name,cmd)  const init_cmd_t    __init_cmd_##name     Struct_Section = {#name,  cmd } 


INIT_CMD(test1,Test_parm);
INIT_CMD(test2,Test_parm2);
INIT_CMD(test3,Test_parm2);
extern unsigned char Load$$INIT_SECTION$$Base[];
extern unsigned char Load$$INIT_SECTION$$Length[];


void Init_all(unsigned long addr,unsigned long len)
{
    init_cmd_t* pCmd;
    unsigned long i;
    
    for(i=0;i<len;)
    {
        pCmd = (init_cmd_t*)(addr+i);
        u_printf("
add:0x%x
",(unsigned long)(pCmd));
        pCmd->cmd();
        u_printf("name:%s
",pCmd->name);
        i+=sizeof(init_cmd_t);
    }
    
}



int main(void)
{
    int i,RX_status;
    unsigned long add = (unsigned long)Load$$INIT_SECTION$$Base;
    unsigned long len = (unsigned long)Load$$INIT_SECTION$$Length;


    u_printf("add:0x%x  ---len:0x%x
",add,len);
    
    Init_all(add,len);
    
    u_printf("
initover
");
}

void Test_parm(void)
{
    u_printf("this is Test_parm!
");
}

void Test_parm2(void)
{
    u_printf("this is Test_parm2!
");
}

sct文件如下：

LR_IROM1 0x08000000 0x00040000  {    ; load region size_region
  ER_IROM1 0x08000000 0x00040000  {  ; load address = execution address
   *.o (RESET, +First)
   *(InRoot$$Sections)
   .ANY (+RO)
  }
  
  INIT_SECTION +0 
  {
    *(INIT_CMD)
  }
  
  RW_IRAM1 0x20000000 0x0000C000  {  ; RW data
   .ANY (+RW +ZI)
  }
}

最后生成的map文件