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Annotation of xinu/sys/pinit.c, revision 1.1.1.1

1.1       root        1: /* pinit.c - pinit */
                      2: 
                      3: #include <conf.h>
                      4: #include <kernel.h>
                      5: #include <mark.h>
                      6: #include <ports.h>
                      7: 
                      8: #ifdef MEMMARK
                      9: MARKER ptmark;
                     10: #endif
                     11: struct ptnode  *ptfree;                /* list of free queue nodes     */
                     12: struct pt      ports[NPORTS];
                     13: int    ptnextp;
                     14: 
                     15: /*------------------------------------------------------------------------
                     16:  *  pinit  --  initialize all ports
                     17:  *------------------------------------------------------------------------
                     18:  */
                     19: SYSCALL        pinit(maxmsgs)
                     20: int maxmsgs;
                     21: {
                     22:        int     i;
                     23:        struct  ptnode  *next, *prev;
                     24: 
                     25:        ptfree = (struct ptnode *) getmem(maxmsgs*sizeof(struct ptnode));
                     26:        if ( (int)ptfree == SYSERR )
                     27:                panic("pinit: no  memory");
                     28:        for (i=0 ; i<NPORTS ; i++) {
                     29:                ports[i].ptstate = PTFREE;
                     30:                ports[i].ptseq = 0;
                     31:        }
                     32:        ptnextp = NPORTS - 1;
                     33: 
                     34:        /* link up free list of message pointer nodes */
                     35: 
                     36:        for ( prev=next=ptfree ;  --maxmsgs > 0  ; prev=next )
                     37:                prev->ptnext = ++next;
                     38:        prev->ptnext = (struct ptnode *)NULL;
                     39:        return(OK);
                     40: }

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