1 /* systm.h 4.17 81/05/05 */ 2 3 /* 4 * Random set of variables 5 * used by more than one 6 * routine. 7 */ 8 int hz; /* frequency of the clock */ 9 int timezone; /* minutes west from greenwich */ 10 int dstflag; /* daylight savings time in effect? */ 11 char canonb[CANBSIZ]; /* buffer for erase and kill (#@) */ 12 char version[]; /* system version */ 13 int lbolt; /* time of day in 60th not in time */ 14 time_t time; /* time in sec from 1970 */ 15 time_t bootime; /* time at which booted */ 16 17 int hand; /* current index into coremap used by daemon */ 18 19 /* 20 * Nblkdev is the number of entries 21 * (rows) in the block switch. It is 22 * set in binit/bio.c by making 23 * a pass over the switch. 24 * Used in bounds checking on major 25 * device numbers. 26 */ 27 int nblkdev; 28 29 /* 30 * Number of character switch entries. 31 * Set by cinit/prim.c 32 */ 33 int nchrdev; 34 35 int nswdev; /* number of swap devices */ 36 int mpid; /* generic for unique process id's */ 37 char runin; /* scheduling flag */ 38 char runout; /* scheduling flag */ 39 int runrun; /* scheduling flag */ 40 char kmapwnt; /* kernel map want flag */ 41 char curpri; /* more scheduling */ 42 43 int maxmem; /* actual max memory per process */ 44 int physmem; /* physical memory on this CPU */ 45 46 int nswap; /* size of swap space */ 47 int updlock; /* lock for sync */ 48 daddr_t rablock; /* block to be read ahead */ 49 extern int intstack[]; /* stack for interrupts */ 50 dev_t rootdev; /* device of the root */ 51 dev_t dumpdev; /* device to take dumps on */ 52 long dumplo; /* offset into dumpdev */ 53 dev_t swapdev; /* swapping device */ 54 dev_t argdev; /* device for argument lists */ 55 dev_t pipedev; /* pipe device */ 56 57 extern int icode[]; /* user init code */ 58 extern int szicode; /* its size */ 59 60 dev_t getmdev(); 61 daddr_t bmap(); 62 caddr_t calloc(); 63 unsigned max(); 64 unsigned min(); 65 int memall(); 66 int uchar(), schar(); 67 int vmemall(); 68 char *wmemall(); 69 swblk_t vtod(); 70 71 /* 72 * Structure of the system-entry table 73 */ 74 extern struct sysent 75 { 76 int sy_narg; /* total number of arguments */ 77 int (*sy_call)(); /* handler */ 78 } sysent[]; 79 80 char vmmap[]; /* poor name! */ 81 int umbabeg,umbaend; /* where sensitive vm begins/ends */ 82 int noproc; /* no one is running just now */ 83 extern int catcher[256]; 84 char *panicstr; 85 int wantin; 86 int boothowto; /* reboot flags, from console subsystem */ 87