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sdide: confusion

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This commit is contained in:
cinap_lenrek 2012-12-28 03:39:39 +01:00
parent 8f3595e058
commit f9b9cab6a1
1 changed files with 4 additions and 5 deletions
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9
sys/src/9/pc/sdide.c
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@ -1066,7 +1066,7 @@ static int
atapktio0(Drive *drive, SDreq *r)
{
uchar *cmd;
int as, cmdport, ctlport, rv;
int as, len, cmdport, ctlport, rv;
Ctlr *ctlr;
rv = SDok;
@ -1074,8 +1074,6 @@ atapktio0(Drive *drive, SDreq *r)
drive->command = Cpkt;
memmove(drive->pktcmd, cmd, r->clen);
memset(drive->pktcmd+r->clen, 0, drive->pkt-r->clen);
if(drive->dlen > 0x8000)
drive->dlen = 0x8000;
drive->limit = drive->data+drive->dlen;
ctlr = drive->ctlr;
@ -1092,11 +1090,12 @@ atapktio0(Drive *drive, SDreq *r)
drive->pktdma = Dma;
else
drive->pktdma = 0;
len = drive->secsize > 0 ? 16*drive->secsize : 0x8000;
outb(cmdport+Features, drive->pktdma);
outb(cmdport+Count, 0);
outb(cmdport+Sector, 0);
outb(cmdport+Bytelo, drive->dlen);
outb(cmdport+Bytehi, drive->dlen>>8);
outb(cmdport+Bytelo, len);
outb(cmdport+Bytehi, len>>8);
outb(cmdport+Dh, drive->dev);
ctlr->done = 0;
ctlr->curdrive = drive;