1990/03091/gnot/main.c (diff list | history)

gnot/main.c on 1990/03091
1990/03091		#include "u.h" #include "lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "io.h" #include "ureg.h" #include "init.h" void main(void) { Lock l; machinit(); mmuinit(); confinit(); printinit(); flushmmu(); procinit0(); pgrpinit(); chaninit(); alarminit(); chandevreset(); pageinit(); userinit(); schedinit(); } void machinit(void) { int n; n = m->machno; memset(m, 0, sizeof(Mach)); m->machno = n; m->mmask = 1<<m->machno; } void mmuinit(void) { ulong l, d, i; /* * Invalidate user addresses */ for(l=0; l<4*1024*1024; l+=BY2PG) putmmu(l, INVALIDPTE); /* * Two meg of usable memory */ for(i=1,l=KTZERO; i<2*1024*1024/BY2PG; l+=BY2PG,i++) putkmmu(l, PPN(l)|PTEVALID|PTEKERNEL); /* * Screen at two meg */ for(i=0,d=DISPLAYRAM; i<256*1024/BY2PG; d+=BY2PG,l+=BY2PG,i++) putkmmu(l, PPN(d)|PTEVALID|PTEKERNEL); } void init0(void) { m->proc = u->p; u->p->state = Running; u->p->mach = m; spllo(); chandevinit(); u->slash = (*devtab[0].attach)(0); u->dot = clone(u->slash, 0); touser(); } FPsave initfp; void userinit(void) { Proc *p; Seg *s; User *up; p = newproc(); p->pgrp = newpgrp(); strcpy(p->text, "*init*"); strcpy(p->pgrp->user, "bootes"); /* savefpregs(&initfp); /**/ /* p->fpstate = FPinit; /**/ /* * Kernel Stack */ p->sched.pc = (ulong)init0; p->sched.sp = USERADDR+BY2PG-20; /* BUG */ p->sched.sr = SUPER|SPL(7); p->upage = newpage(0, 0, USERADDR|(p->pid&0xFFFF)); /* * User */ up = (User*)(p->upage->pa|KZERO); up->p = p; /* * User Stack */ s = &p->seg[SSEG]; s->proc = p; s->o = neworig(USTKTOP-BY2PG, 1, OWRPERM, 0); s->minva = USTKTOP-BY2PG; s->maxva = USTKTOP; /* * Text */ s = &p->seg[TSEG]; s->proc = p; s->o = neworig(UTZERO, 1, 0, 0); s->o->pte[0].page = newpage(0, 0, UTZERO); memcpy((ulong*)(s->o->pte[0].page->pa|KZERO), initcode, sizeof initcode); s->minva = UTZERO; s->maxva = UTZERO+BY2PG; ready(p); } void exit(void) { int i; u = 0; splhi(); print("exiting\n"); for(;;) ; } /* * Insert new into list after where */ void insert(List **head, List *where, List *new) { if(where == 0){ new->next = *head; *head = new; }else{ new->next = where->next; where->next = new; } } /* * Insert new into list at end */ void append(List **head, List *new) { List *where; where = *head; if(where == 0) *head = new; else{ while(where->next) where = where->next; where->next = new; } new->next = 0; } /* * Delete old from list */ void delete0(List **head, List *old) { List *l; l = *head; if(l == old){ *head = old->next; return; } while(l->next != old) l = l->next; l->next = old->next; } /* * Delete old from list. where->next is known to be old. */ void delete(List **head, List *where, List *old) { if(where == 0){ *head = old->next; return; } where->next = old->next; } Conf conf; void confinit(void) { conf.nmach = 1; if(conf.nmach > MAXMACH) panic("confinit"); conf.nproc = 15; conf.npgrp = 15; conf.npage = (2*1024*1024)/BY2PG; conf.npte = 500; conf.nmod = 50; conf.nalarm = 50; conf.norig = 50; conf.nchan = 100; conf.nenv = 50; conf.nenvchar = 4000; conf.npgenv = 100; conf.nmtab = 50; conf.nmount = 100; conf.nmntdev = 5; conf.nsrv = 32; }