1 /* systm.h 4.34 83/03/31 */ 2 3 /* 4 * Random set of variables 5 * used by more than one 6 * routine. 7 */ 8 int hand; /* current index into coremap used by daemon */ 9 extern char version[]; /* system version */ 10 11 /* 12 * Nblkdev is the number of entries 13 * (rows) in the block switch. It is 14 * set in binit/bio.c by making 15 * a pass over the switch. 16 * Used in bounds checking on major 17 * device numbers. 18 */ 19 int nblkdev; 20 21 /* 22 * Number of character switch entries. 23 * Set by cinit/prim.c 24 */ 25 int nchrdev; 26 27 int nswdev; /* number of swap devices */ 28 int mpid; /* generic for unique process id's */ 29 char runin; /* scheduling flag */ 30 char runout; /* scheduling flag */ 31 int runrun; /* scheduling flag */ 32 char kmapwnt; /* kernel map want flag */ 33 char curpri; /* more scheduling */ 34 35 int maxmem; /* actual max memory per process */ 36 int physmem; /* physical memory on this CPU */ 37 38 int nswap; /* size of swap space */ 39 int updlock; /* lock for sync */ 40 daddr_t rablock; /* block to be read ahead */ 41 int rasize; /* size of block in rablock */ 42 extern int intstack[]; /* stack for interrupts */ 43 dev_t rootdev; /* device of the root */ 44 dev_t dumpdev; /* device to take dumps on */ 45 long dumplo; /* offset into dumpdev */ 46 dev_t swapdev; /* swapping device */ 47 dev_t argdev; /* device for argument lists */ 48 49 #ifdef vax 50 extern int icode[]; /* user init code */ 51 extern int szicode; /* its size */ 52 #endif 53 #ifdef MUSH 54 extern int mcode[]; /* MUSH: startup code */ 55 extern int szmcode; /* & its size */ 56 #endif 57 58 daddr_t bmap(); 59 caddr_t calloc(); 60 unsigned max(); 61 unsigned min(); 62 int memall(); 63 int uchar(), schar(); 64 int vmemall(); 65 caddr_t wmemall(); 66 swblk_t vtod(); 67 68 /* 69 * Structure of the system-entry table 70 */ 71 extern struct sysent 72 { 73 int sy_narg; /* total number of arguments */ 74 int (*sy_call)(); /* handler */ 75 } sysent[]; 76 77 int noproc; /* no one is running just now */ 78 char *panicstr; 79 int wantin; 80 int boothowto; /* reboot flags, from console subsystem */ 81 int selwait; 82 83 extern char vmmap[]; /* poor name! */ 84 85 /* casts to keep lint happy */ 86 #define insque(q,p) _insque((caddr_t)q,(caddr_t)p) 87 #define remque(q) _remque((caddr_t)q) 88 #define queue(q,p) _queue((caddr_t)q,(caddr_t)p) 89 #define dequeue(q) _dequeue((caddr_t)q) 90