ide.c.svn-base

我们自己开发的一个OSEK操作系统！不知道可不可以？

            buf[13] = 0x10; /* DVD-ROM profile */
            buf[14] = buf[7] == 0x10; /* (in)active */
            buf[17] = 0x08; /* CD-ROM profile */
            buf[18] = buf[7] == 0x08; /* (in)active */
            ide_atapi_cmd_reply(s, 32, 32);
            break;
        }
    default:
        ide_atapi_cmd_error(s, SENSE_ILLEGAL_REQUEST,
                            ASC_ILLEGAL_OPCODE);
        break;
    }
}

static void ide_cfata_metadata_inquiry(IDEState *s)
{
    uint16_t *p;
    uint32_t spd;

    p = (uint16_t *) s->io_buffer;
    memset(p, 0, 0x200);
    spd = ((s->mdata_size - 1) >> 9) + 1;

    put_le16(p + 0, 0x0001);			/* Data format revision */
    put_le16(p + 1, 0x0000);			/* Media property: silicon */
    put_le16(p + 2, s->media_changed);		/* Media status */
    put_le16(p + 3, s->mdata_size & 0xffff);	/* Capacity in bytes (low) */
    put_le16(p + 4, s->mdata_size >> 16);	/* Capacity in bytes (high) */
    put_le16(p + 5, spd & 0xffff);		/* Sectors per device (low) */
    put_le16(p + 6, spd >> 16);			/* Sectors per device (high) */
}

static void ide_cfata_metadata_read(IDEState *s)
{
    uint16_t *p;

    if (((s->hcyl << 16) | s->lcyl) << 9 > s->mdata_size + 2) {
        s->status = ERR_STAT;
        s->error = ABRT_ERR;
        return;
    }

    p = (uint16_t *) s->io_buffer;
    memset(p, 0, 0x200);

    put_le16(p + 0, s->media_changed);		/* Media status */
    memcpy(p + 1, s->mdata_storage + (((s->hcyl << 16) | s->lcyl) << 9),
                    MIN(MIN(s->mdata_size - (((s->hcyl << 16) | s->lcyl) << 9),
                                    s->nsector << 9), 0x200 - 2));
}

static void ide_cfata_metadata_write(IDEState *s)
{
    if (((s->hcyl << 16) | s->lcyl) << 9 > s->mdata_size + 2) {
        s->status = ERR_STAT;
        s->error = ABRT_ERR;
        return;
    }

    s->media_changed = 0;

    memcpy(s->mdata_storage + (((s->hcyl << 16) | s->lcyl) << 9),
                    s->io_buffer + 2,
                    MIN(MIN(s->mdata_size - (((s->hcyl << 16) | s->lcyl) << 9),
                                    s->nsector << 9), 0x200 - 2));
}

/* called when the inserted state of the media has changed */
static void cdrom_change_cb(void *opaque)
{
    IDEState *s = opaque;
    uint64_t nb_sectors;

    /* XXX: send interrupt too */
    bdrv_get_geometry(s->bs, &nb_sectors);
    s->nb_sectors = nb_sectors;
}

static void ide_cmd_lba48_transform(IDEState *s, int lba48)
{
    s->lba48 = lba48;

    /* handle the 'magic' 0 nsector count conversion here. to avoid
     * fiddling with the rest of the read logic, we just store the
     * full sector count in ->nsector and ignore ->hob_nsector from now
     */
    if (!s->lba48) {
	if (!s->nsector)
	    s->nsector = 256;
    } else {
	if (!s->nsector && !s->hob_nsector)
	    s->nsector = 65536;
	else {
	    int lo = s->nsector;
	    int hi = s->hob_nsector;

	    s->nsector = (hi << 8) | lo;
	}
    }
}

static void ide_clear_hob(IDEState *ide_if)
{
    /* any write clears HOB high bit of device control register */
    ide_if[0].select &= ~(1 << 7);
    ide_if[1].select &= ~(1 << 7);
}

static void ide_ioport_write(void *opaque, uint32_t addr, uint32_t val)
{
    IDEState *ide_if = opaque;
    IDEState *s;
    int unit, n;
    int lba48 = 0;

#ifdef DEBUG_IDE
    printf("IDE: write addr=0x%x val=0x%02x\n", addr, val);
#endif

    addr &= 7;
    switch(addr) {
    case 0:
        break;
    case 1:
	ide_clear_hob(ide_if);
        /* NOTE: data is written to the two drives */
	ide_if[0].hob_feature = ide_if[0].feature;
	ide_if[1].hob_feature = ide_if[1].feature;
        ide_if[0].feature = val;
        ide_if[1].feature = val;
        break;
    case 2:
	ide_clear_hob(ide_if);
	ide_if[0].hob_nsector = ide_if[0].nsector;
	ide_if[1].hob_nsector = ide_if[1].nsector;
        ide_if[0].nsector = val;
        ide_if[1].nsector = val;
        break;
    case 3:
	ide_clear_hob(ide_if);
	ide_if[0].hob_sector = ide_if[0].sector;
	ide_if[1].hob_sector = ide_if[1].sector;
        ide_if[0].sector = val;
        ide_if[1].sector = val;
        break;
    case 4:
	ide_clear_hob(ide_if);
	ide_if[0].hob_lcyl = ide_if[0].lcyl;
	ide_if[1].hob_lcyl = ide_if[1].lcyl;
        ide_if[0].lcyl = val;
        ide_if[1].lcyl = val;
        break;
    case 5:
	ide_clear_hob(ide_if);
	ide_if[0].hob_hcyl = ide_if[0].hcyl;
	ide_if[1].hob_hcyl = ide_if[1].hcyl;
        ide_if[0].hcyl = val;
        ide_if[1].hcyl = val;
        break;
    case 6:
	/* FIXME: HOB readback uses bit 7 */
        ide_if[0].select = (val & ~0x10) | 0xa0;
        ide_if[1].select = (val | 0x10) | 0xa0;
        /* select drive */
        unit = (val >> 4) & 1;
        s = ide_if + unit;
        ide_if->cur_drive = s;
        break;
    default:
    case 7:
        /* command */
#if defined(DEBUG_IDE)
        printf("ide: CMD=%02x\n", val);
#endif
        s = ide_if->cur_drive;
        /* ignore commands to non existant slave */
        if (s != ide_if && !s->bs)
            break;

        switch(val) {
        case WIN_IDENTIFY:
            if (s->bs && !s->is_cdrom) {
                if (!s->is_cf)
                    ide_identify(s);
                else
                    ide_cfata_identify(s);
                s->status = READY_STAT | SEEK_STAT;
                ide_transfer_start(s, s->io_buffer, 512, ide_transfer_stop);
            } else {
                if (s->is_cdrom) {
                    ide_set_signature(s);
                }
                ide_abort_command(s);
            }
            ide_set_irq(s);
            break;
        case WIN_SPECIFY:
        case WIN_RECAL:
            s->error = 0;
            s->status = READY_STAT | SEEK_STAT;
            ide_set_irq(s);
            break;
        case WIN_SETMULT:
            if (s->is_cf && s->nsector == 0) {
                /* Disable Read and Write Multiple */
                s->mult_sectors = 0;
                s->status = READY_STAT;
            } else if ((s->nsector & 0xff) != 0 &&
                ((s->nsector & 0xff) > MAX_MULT_SECTORS ||
                 (s->nsector & (s->nsector - 1)) != 0)) {
                ide_abort_command(s);
            } else {
                s->mult_sectors = s->nsector & 0xff;
                s->status = READY_STAT;
            }
            ide_set_irq(s);
            break;
        case WIN_VERIFY_EXT:
	    lba48 = 1;
        case WIN_VERIFY:
        case WIN_VERIFY_ONCE:
            /* do sector number check ? */
	    ide_cmd_lba48_transform(s, lba48);
            s->status = READY_STAT;
            ide_set_irq(s);
            break;
	case WIN_READ_EXT:
	    lba48 = 1;
        case WIN_READ:
        case WIN_READ_ONCE:
            if (!s->bs)
                goto abort_cmd;
	    ide_cmd_lba48_transform(s, lba48);
            s->req_nb_sectors = 1;
            ide_sector_read(s);
            break;
	case WIN_WRITE_EXT:
	    lba48 = 1;
        case WIN_WRITE:
        case WIN_WRITE_ONCE:
        case CFA_WRITE_SECT_WO_ERASE:
        case WIN_WRITE_VERIFY:
	    ide_cmd_lba48_transform(s, lba48);
            s->error = 0;
            s->status = SEEK_STAT | READY_STAT;
            s->req_nb_sectors = 1;
            ide_transfer_start(s, s->io_buffer, 512, ide_sector_write);
            s->media_changed = 1;
            break;
	case WIN_MULTREAD_EXT:
	    lba48 = 1;
        case WIN_MULTREAD:
            if (!s->mult_sectors)
                goto abort_cmd;
	    ide_cmd_lba48_transform(s, lba48);
            s->req_nb_sectors = s->mult_sectors;
            ide_sector_read(s);
            break;
        case WIN_MULTWRITE_EXT:
	    lba48 = 1;
        case WIN_MULTWRITE:
        case CFA_WRITE_MULTI_WO_ERASE:
            if (!s->mult_sectors)
                goto abort_cmd;
	    ide_cmd_lba48_transform(s, lba48);
            s->error = 0;
            s->status = SEEK_STAT | READY_STAT;
            s->req_nb_sectors = s->mult_sectors;
            n = s->nsector;
            if (n > s->req_nb_sectors)
                n = s->req_nb_sectors;
            ide_transfer_start(s, s->io_buffer, 512 * n, ide_sector_write);
            s->media_changed = 1;
            break;
	case WIN_READDMA_EXT:
	    lba48 = 1;
        case WIN_READDMA:
        case WIN_READDMA_ONCE:
            if (!s->bs)
                goto abort_cmd;
	    ide_cmd_lba48_transform(s, lba48);
            ide_sector_read_dma(s);
            break;
	case WIN_WRITEDMA_EXT:
	    lba48 = 1;
        case WIN_WRITEDMA:
        case WIN_WRITEDMA_ONCE:
            if (!s->bs)
                goto abort_cmd;
	    ide_cmd_lba48_transform(s, lba48);
            ide_sector_write_dma(s);
            s->media_changed = 1;
            break;
        case WIN_READ_NATIVE_MAX_EXT:
	    lba48 = 1;
        case WIN_READ_NATIVE_MAX:
	    ide_cmd_lba48_transform(s, lba48);
            ide_set_sector(s, s->nb_sectors - 1);
            s->status = READY_STAT;
            ide_set_irq(s);
            break;
        case WIN_CHECKPOWERMODE1:
        case WIN_CHECKPOWERMODE2:
            s->nsector = 0xff; /* device active or idle */
            s->status = READY_STAT;
            ide_set_irq(s);
            break;
        case WIN_SETFEATURES:
            if (!s->bs)
                goto abort_cmd;
            /* XXX: valid for CDROM ? */
            switch(s->feature) {
            case 0xcc: /* reverting to power-on defaults enable */
            case 0x66: /* reverting to power-on defaults disable */
            case 0x02: /* write cache enable */
            case 0x82: /* write cache disable */
            case 0xaa: /* read look-ahead enable */
            case 0x55: /* read look-ahead disable */
            case 0x05: /* set advanced power management mode */
            case 0x85: /* disable advanced power management mode */
            case 0x69: /* NOP */
            case 0x67: /* NOP */
            case 0x96: /* NOP */
            case 0x9a: /* NOP */
            case 0x42: /* enable Automatic Acoustic Mode */
            case 0xc2: /* disable Automatic Acoustic Mode */
                s->status = READY_STAT | SEEK_STAT;
                ide_set_irq(s);
                break;
            case 0x03: { /* set transfer mode */
		uint8_t val = s->nsector & 0x07;

		switch (s->nsector >> 3) {
		    case 0x00: /* pio default */
		    case 0x01: /* pio mode */
			put_le16(s->identify_data + 63,0x07);
			put_le16(s->identify_data + 88,0x3f);
			break;
		    case 0x04: /* mdma mode */
			put_le16(s->identify_data + 63,0x07 | (1 << (val + 8)));
			put_le16(s->identify_data + 88,0x3f);
			break;
		    case 0x08: /* udma mode */
			put_le16(s->identify_data + 63,0x07);
			put_le16(s->identify_data + 88,0x3f | (1 << (val + 8)));
			break;
		    default:
			goto abort_cmd;
		}
                s->status = READY_STAT | SEEK_STAT;
                ide_set_irq(s);
                break;
	    }
            default:
                goto abort_cmd;
            }
            break;
        case WIN_FLUSH_CACHE:
        case WIN_FLUSH_CACHE_EXT:
            if (s->bs)
                bdrv_flush(s->bs);
	    s->status = READY_STAT;
            ide_set_irq(s);
            break;
        case WIN_STANDBY:
        case WIN_STANDBY2:
        case WIN_STANDBYNOW1:
        case WIN_STANDBYNOW2:
        case WIN_IDLEIMMEDIATE:
        case CFA_IDLEIMMEDIATE:
        case WIN_SETIDLE1:
        case WIN_SETIDLE2:
        case WIN_SLEEPNOW1:
        case WIN_SLEEPNOW2:
            s->status = READY_STAT;
            ide_set_irq(s);
            break;
            /* ATAPI commands */
        case WIN_PIDENTIFY:
            if (s->is_cdrom) {
                ide_atapi_identify(s);
                s->status = READY_STAT | SEEK_STAT;
                ide_transfer_start(s, s->io_buffer, 512, ide_transfer_stop);
            } else {
                ide_abort_command(s);
            }
            ide_set_irq(s);
            break;
        case WIN_DIAGNOSE:
            ide_set_signature(s);
            s->status = 0x00; /* NOTE: READY is _not_ set */
            s->error = 0x01;
            ide_set_irq(s);
            break;
        case WIN_SRST:
            if (!s->is_cdrom)
                goto abort_cmd;
            ide_set_signature(s);
            s->status = 0x00; /* NOTE: READY is _not_ set */
            s->error = 0x01;
            break;
        case WIN_PACKETCMD:
            if (!s->is_cdrom)
                goto abort_cmd;
            /* overlapping commands not supported */
            if (s->feature & 0x02)
                goto abort_cmd;
            s->status = READY_STAT;
            s->atapi_dma = s->feature & 1;
            s->nsector = 1;
            ide_transfer_start(s, s->io_buffer, A