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Move the PC98 specific geometry "gunk" to geom_pc98.c where it belongs.

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This also adds support for bigger disks on the controller I have access to,
and maybe others if I understood the adhoc methods used on those.

Those with more PC98 bigdrive controllers it is hereby invited to add/fix
support for those in geom_pc98.c and not using #ifdef PC98 all over the place.
This commit is contained in:
Søren Schmidt 2004-10-07 17:37:09 +00:00
parent 085a2b4010
commit 6c35773729
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=136233
4 changed files with 22 additions and 8 deletions
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3
sys/dev/ata/ata-all.h
View File

@ -343,8 +343,7 @@ struct ata_channel {
int flags; /* channel flags */
#define ATA_NO_SLAVE 0x01
#define ATA_USE_16BIT 0x02
#define ATA_USE_PC98GEOM 0x04
#define ATA_ATAPI_DMA_RO 0x08
#define ATA_ATAPI_DMA_RO 0x04
#define ATA_48BIT_ACTIVE 0x10
#define ATA_IMMEDIATE_MODE 0x20
#define ATA_HWGONE 0x40

2
sys/dev/ata/ata-cbus.c
View File

@ -329,7 +329,7 @@ ata_cbussub_probe(device_t dev)
ch->r_io[ATA_ALTSTAT].offset = 0;
/* initialize softc for this channel */
ch->flags |= ATA_USE_16BIT | ATA_USE_PC98GEOM;
ch->flags |= ATA_USE_16BIT;
ch->locking = ctlr->locking;
ch->device[MASTER].setmode = ctlr->setmode;
ch->device[SLAVE].setmode = ctlr->setmode;

6
sys/dev/ata/ata-disk.c
View File

@ -92,11 +92,7 @@ ad_attach(struct ata_device *atadev)
adp->heads = atadev->param->heads;
adp->sectors = atadev->param->sectors;
adp->total_secs = atadev->param->cylinders * adp->heads * adp->sectors;
if (adp->device->channel->flags & ATA_USE_PC98GEOM &&
adp->total_secs < 17 * 8 * 65536) {
adp->sectors = 17;
adp->heads = 8;
}
mtx_init(&adp->queue_mtx, "ATA disk bioqueue lock", NULL, MTX_DEF);
bioq_init(&adp->queue);

19
sys/geom/geom_pc98.c
View File

@ -258,6 +258,25 @@ g_pc98_taste(struct g_class *mp, struct g_provider *pp, int flags)
sectorsize = cp->provider->sectorsize;
if (sectorsize < 512)
break;
if (cp->provider->mediasize/sectorsize < 17*8*65535) {
fwsectors = 17;
fwheads = 8;
}
else if (cp->provider->mediasize/sectorsize < 63*16*65535) {
if (fwsectors > 63)
fwsectors = 63;
if (fwheads > 16)
fwheads = 16;
}
else if (cp->provider->mediasize/sectorsize < 255*16*65535) {
fwsectors = 255;
if (fwheads > 16)
fwheads = 16;
}
else {
fwsectors = 255;
fwheads = 255;
}
buf = g_read_data(cp, 0, 8192, &error);
if (buf == NULL || error != 0)
break;