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Annotation of researchv9/sys/boot/stand/spinning.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * @(#)spinning.c 1.1 86/02/03 Copyright (c) 1985 by Sun Microsystems, Inc.
                      3:  */
                      4: #include <sys/types.h>
                      5: #include <sys/inode.h>
                      6: #include "saio.h"
                      7: #include <machine/sunromvec.h>
                      8: 
                      9: char msg_spinup[] = "\n\007Waiting for disk to spin up...\n\n\
                     10: Please start it, if necessary, -OR- press any key to quit.\n\n";
                     11: char msg_noctlr[] = "No controller at mbio %x\n";
                     12: 
                     13: /*
                     14:  * Returns 0 if disk is apparently not spinning, after waiting awhile.
                     15:  * Returns 1 if disk is already spinning on entry to this routine.
                     16:  * Returns 2 if disk starts spinning sometime after entry to this routine.
                     17:  * Returns <0 if (*isready)() returns a negative result at any time.
                     18:  * 
                     19:  * If on initial entry, after a suitable delay, the disk is not spinning,
                     20:  * we produce a message to remind the user to turn on the disk.
                     21:  */
                     22: int
                     23: isspinning(isready, addr, data) 
                     24:        int (*isready)();
                     25:        char *addr;
                     26:        int data;
                     27: {
                     28:        register int r;
                     29:        long t;
                     30: 
                     31:        /*
                     32:         * Wait for disk to spin up, if necessary.
                     33:         */
                     34:        r = (*isready)(addr, data);
                     35:        if (r < 0)
                     36:                return r;               /* Error */
                     37:        if (r)
                     38:                return 1;               /* Already spinning */
                     39:        DELAY(1000000);                 /* RTZ can take a long time */
                     40:        r = (*isready)(addr, data);
                     41:        if (r < 0)
                     42:                return r;
                     43:        if (r)
                     44:                return 2;               /* Spun up while we waited */
                     45:        while ((*romp->v_mayget)() != -1)               /* clear typeahead */
                     46:                ;
                     47:        printf(msg_spinup);
                     48:        t = (3*60*1000) + *romp->v_nmiclock; /* quitting time in 3 minutes */
                     49: 
                     50:        for (;;) {
                     51:                r = (*isready)(addr, data);     /* Test disk */
                     52:                if (r < 0)
                     53:                        return r;
                     54:                if (r)
                     55:                        return 2;
                     56:                if ((*romp->v_mayget)() != -1)  /* Test keyboard */
                     57:                        return 0;
                     58:                if (*romp->v_nmiclock > t) {    /* Test timer */
                     59:                        printf("Giving up...\n");
                     60:                        return 0;
                     61:                }       
                     62:        }                                       /* Loop */
                     63: }

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