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i8257: fix Terminal Count status

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When a DMA transfer is done (ie all bytes have been transfered), the corresponding
Terminal Count bit must be set in the status register.
This bit is already cleared in i8257_read_cont and i8257_write_cont when required.

This fixes (at least) floppy transfer in IBM 40p firmware, which checks in DMA
controller if everything went fine.

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Message-Id: <1456404332-31556-1-git-send-email-hpoussin@reactos.org>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Hervé Poussineau 2016-02-25 13:45:32 +01:00 committed by Paolo Bonzini
parent c586eac336
commit bb8f32c031
1 changed files with 4 additions and 0 deletions

4
hw/dma/i8257.c

@ -342,6 +342,10 @@ static void i8257_channel_run(I8257State *d, int ichan)
r->now[COUNT], (r->base[COUNT] + 1) << ncont);
r->now[COUNT] = n;
ldebug ("dma_pos %d size %d\n", n, (r->base[COUNT] + 1) << ncont);
if (n == (r->base[COUNT] + 1) << ncont) {
ldebug("transfer done\n");
d->status |= (1 << ichan);
}
}
static void i8257_dma_run(void *opaque)