#define NBPG 8192 /* bytes/page */ #define PGOFSET (NBPG-1) /* byte offset into page */ #define PGSHIFT 13 /* LOG2(NBPG) */ #define CLSIZE 1 #define CLOFSET (CLSIZE*NBPG-1) /* for clusters, like PGOFSET */ #define BITFS(dev) ((dev) & 64) #define BSIZE(dev) (4192) #define BMASK(dev) (017777) #define BSHIFT(dev) (13) #define PAGSIZ (NBPG*CLSIZE) #define PAGRND ((PAGSIZ)-1)