#include <config.h>#include <common.h>voidsignal_delay(unsigned int n){  while (n--);}voidsignal_on(void){  *((volatile uint *)BCSR4) &= ~(1<<(31-3)); /* led on */}voidsignal_off(void){  *((volatile uint *)BCSR4) |= (1<<(31-3)); /* led off */}voidslow_blink(unsigned int n){  while (n--) {    signal_on();    signal_delay(0x00400000);    signal_off();    signal_delay(0x00400000);  }}voidfast_blink(unsigned int n){  while (n--) {    signal_on();    signal_delay(0x00100000);    signal_off();    signal_delay(0x00100000);  }}