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Annotation of researchv8dc/sys/dev/iti.c, revision 1.1

1.1     ! root        1: /*     %W%     */
        !             2: #include "iti.h"
        !             3: #include "../h/pte.h"
        !             4: #include "../h/param.h"
        !             5: #include "../h/dir.h"
        !             6: #include "../h/user.h"
        !             7: #include "../h/systm.h"
        !             8: #include "../h/ioctl.h"
        !             9: #include "../h/ubareg.h"
        !            10: #include "../h/buf.h"
        !            11: #include "../h/ubavar.h"
        !            12: #include "../h/itireg.h"
        !            13: int    itiprobe(), itiattach();
        !            14: struct uba_device *itidinfo[NITI];
        !            15: u_short        itistd[]={ 0160100, 0 };
        !            16: struct uba_driver itidriver={
        !            17:        itiprobe, 0, itiattach, 0, itistd, "iti", itidinfo, 0, 0
        !            18: };
        !            19: struct iti{
        !            20:        char open;
        !            21: }iti[NITI];
        !            22: itiprobe(reg)
        !            23: caddr_t reg;
        !            24: {
        !            25:        register int br=0x15, cvec=0710;                /* value-result */
        !            26:        return(1);
        !            27: }
        !            28: /*ARGSUSED*/
        !            29: itiattach(ui)
        !            30: struct uba_device *ui;
        !            31: {
        !            32: }
        !            33: itiopen(dev)
        !            34: dev_t dev;
        !            35: {
        !            36:        register struct iti *p=&iti[minor(dev)];
        !            37:        register struct uba_device *ui=itidinfo[minor(dev)];
        !            38:        if(minor(dev)>=NITI || p->open || !ui->ui_alive)
        !            39:                u.u_error=ENXIO;
        !            40:        else{
        !            41:                p->open=1;
        !            42:                maptouser(ui->ui_addr);
        !            43:        }
        !            44: }
        !            45: iticlose(dev)
        !            46: dev_t dev;
        !            47: {
        !            48:        iti[minor(dev)].open=0;
        !            49:        unmaptouser(itidinfo[minor(dev)]->ui_addr);
        !            50: }
        !            51: /*ARGSUSED*/
        !            52: itiioctl(dev, cmd, data, flag)
        !            53: dev_t dev;
        !            54: int cmd;
        !            55: register caddr_t data;
        !            56: int flag;
        !            57: {
        !            58:        register struct uba_device *ui = itidinfo[minor(dev)];
        !            59:        switch (cmd) {
        !            60:        case ITIADDR:
        !            61:                copyout((caddr_t)&ui->ui_addr, (caddr_t)data, sizeof ui->ui_addr);
        !            62:                break;
        !            63:        default:
        !            64:                return (ENOTTY);
        !            65:        }
        !            66:        return (0);
        !            67: }
        !            68: /*ARGSUSED*/
        !            69: itiintr(dev)
        !            70: dev_t dev;
        !            71: {}
        !            72: /*
        !            73:  * Map a virtual address into users address space. Actually all we
        !            74:  * do is turn on the user mode write protection bits for the particular
        !            75:  * page of memory involved.
        !            76:  */
        !            77: maptouser(vaddress)
        !            78: caddr_t vaddress;
        !            79: {
        !            80:        Sysmap[((unsigned)vaddress-0x80000000)>>9].pg_prot=PG_UW>>27;
        !            81: }
        !            82: unmaptouser(vaddress)
        !            83: caddr_t vaddress;
        !            84: {
        !            85:        Sysmap[((unsigned)vaddress-0x80000000)>>9].pg_prot=PG_KW>>27;
        !            86: }

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