Hi All,

 

In order to debug the 8548 CDS BSP of kernel 2.6, I want setup serial port with UART on mpc85xx as early as possible. . I add the register access code at the beginning of  platform_init(). However the system just hanging there with this line. If I comment out this line"WRITE8_ADDR(M85xx_EIIADDR,0)", then linux kernel runs well.

 

Thanks in advance,

 

Mike Z

 

Here is the code of my mpc85xx_cds_common.c:

 

#define WRITE8_ADDR(address, value) \

    ((*((volatile u8 *)(address))) = (u8)(value))

 

#define M85xx_EII_ADDR 0xe0004500

 

void __init

platform_init(unsigned long r3, unsigned long r4, unsigned long r5,

                   unsigned long r6, unsigned long r7)

{

       /* parse_bootinfo must always be called first */

       parse_bootinfo(find_bootinfo());

     

      /* Now we try to access register of UART */

      WRITE8_ADDR(M85xx_EII_ADDR, 0);

....

}