1*30402Skarels /* param.h 1.5 87/01/16 */ 225681Ssam 325681Ssam /* 425681Ssam * Machine dependent constants for TAHOE. 525681Ssam */ 629950Skarels 729950Skarels #ifndef ENDIAN 829950Skarels /* 929950Skarels * Definitions for byte order, 1029950Skarels * according to byte significance from low address to high. 1129950Skarels */ 1229950Skarels #define LITTLE 1234 /* least-significant byte first (vax) */ 1329950Skarels #define BIG 4321 /* most-significant byte first */ 1429950Skarels #define PDP 3412 /* LSB first in word, MSW first in long (pdp) */ 1529950Skarels #define ENDIAN BIG /* byte order on tahoe */ 1629950Skarels 17*30402Skarels /* 18*30402Skarels * Macros for network/external number representation conversion. 19*30402Skarels */ 20*30402Skarels #if ENDIAN == BIG && !defined(lint) 21*30402Skarels #define ntohl(x) (x) 22*30402Skarels #define ntohs(x) (x) 23*30402Skarels #define htonl(x) (x) 24*30402Skarels #define htons(x) (x) 25*30402Skarels #else 26*30402Skarels u_short ntohs(), htons(); 27*30402Skarels u_long ntohl(), htonl(); 28*30402Skarels #endif 29*30402Skarels 3025681Ssam #define NBPG 1024 /* bytes/page */ 3125681Ssam #define PGOFSET (NBPG-1) /* byte offset into page */ 3225681Ssam #define PGSHIFT 10 /* LOG2(NBPG) */ 3325681Ssam 3425681Ssam #define CLSIZE 1 3525681Ssam #define CLSIZELOG2 0 3625681Ssam 3725681Ssam #define SSIZE 2 /* initial stack size/NBPG */ 3825681Ssam #define SINCR 2 /* increment of stack/NBPG */ 3925681Ssam #define UPAGES 6 /* pages of u-area (2 stack pages) */ 4025681Ssam 4125681Ssam #define MAXCKEY 255 /* maximal allowed code key */ 4225681Ssam #define MAXDKEY 255 /* maximal allowed data key */ 4325681Ssam #define NCKEY (MAXCKEY+1) /* # code keys, including 0 (reserved) */ 4425681Ssam #define NDKEY (MAXDKEY+1) /* # data keys, including 0 (reserved) */ 4525681Ssam 4625681Ssam /* 4725681Ssam * Some macros for units conversion 4825681Ssam */ 4925681Ssam /* Core clicks (1024 bytes) to segments and vice versa */ 5025681Ssam #define ctos(x) (x) 5125681Ssam #define stoc(x) (x) 5225681Ssam 5325681Ssam /* Core clicks (1024 bytes) to disk blocks */ 5425681Ssam #define ctod(x) (x) 5525681Ssam #define dtoc(x) (x) 5625681Ssam #define dtob(x) ((x)<<PGSHIFT) 5725681Ssam 5825681Ssam /* clicks to bytes */ 5925681Ssam #define ctob(x) ((x)<<PGSHIFT) 6025681Ssam 6125681Ssam /* bytes to clicks */ 6225681Ssam #define btoc(x) ((((unsigned)(x)+NBPG-1) >> PGSHIFT)) 6325681Ssam 6425681Ssam /* 6525681Ssam * Macros to decode processor status word. 6625681Ssam */ 6725681Ssam #define USERMODE(ps) (((ps) & PSL_CURMOD) == PSL_CURMOD) 6825681Ssam #define BASEPRI(ps) (((ps) & PSL_IPL) == 0) 6925681Ssam 7025681Ssam #define DELAY(n) { register int N = 3*(n); while (--N > 0); } 7129950Skarels #endif 72