| #include "libcflat.h" | |
| #include "smp.h" | |
| static struct spinlock lock; | |
| static void print_serial(const char *buf) | |
| { | |
| unsigned long len = strlen(buf); | |
| asm volatile ("rep/outsb" : "+S"(buf), "+c"(len) : "d"(0xf1)); | |
| } | |
| void puts(const char *s) | |
| { | |
| spin_lock(&lock); | |
| print_serial(s); | |
| spin_unlock(&lock); | |
| } | |
| void exit(int code) | |
| { | |
| asm volatile("out %0, %1" : : "a"(code), "d"((short)0xf4)); | |
| } |