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[Qemu-devel] [PATCH] i8257: fix Terminal Count status
From: |
Hervé Poussineau |
Subject: |
[Qemu-devel] [PATCH] i8257: fix Terminal Count status |
Date: |
Thu, 25 Feb 2016 13:45:32 +0100 |
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 <address@hidden>
---
hw/dma/i8257.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/hw/dma/i8257.c b/hw/dma/i8257.c
index 5a52707..6078893 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)
--
2.1.4
- [Qemu-devel] [PATCH] i8257: fix Terminal Count status,
Hervé Poussineau <=