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);
....
}
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-dev
