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authorHervé Poussineau <hpoussin@reactos.org>2016-02-25 13:45:32 +0100
committerPaolo Bonzini <pbonzini@redhat.com>2016-03-07 13:18:28 +0100
commitbb8f32c0318cb6c6e13e09ec0f35e21eff246413 (patch)
tree55716ea1fe656983c0dae91bb21e5104a08a86c9
parentc586eac33670c198c6c9ceb1419aa99dafcce907 (diff)
i8257: fix Terminal Count status
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>
-rw-r--r--hw/dma/i8257.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/hw/dma/i8257.c b/hw/dma/i8257.c
index 5a52707ae2..6078893efb 100644
--- a/hw/dma/i8257.c
+++ b/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)