PMON

 #define NSREG(x) x     /* in pmon/dev/ns16550.h */

kernel

#define CKSEG1ADDR(a)  (CPHYSADDR(a) | CKSEG1)   /* 把一个地址转换为 0xffffffffb....... */
#define CKSEG1 _CONST64_(0xffffffffa0000000)
#define CPHYSADDR(a) ((_ACAST32_(a)) & 0x1fffffff)