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path: root/hw/block/fdc.c
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Diffstat (limited to 'hw/block/fdc.c')
-rw-r--r--hw/block/fdc.c61
1 files changed, 18 insertions, 43 deletions
diff --git a/hw/block/fdc.c b/hw/block/fdc.c
index 22e954e0dc..33bc9e2f92 100644
--- a/hw/block/fdc.c
+++ b/hw/block/fdc.c
@@ -1714,53 +1714,28 @@ static void fdctrl_start_transfer(FDCtrl *fdctrl, int direction)
}
fdctrl->eot = fdctrl->fifo[6];
if (fdctrl->dor & FD_DOR_DMAEN) {
- IsaDmaTransferMode dma_mode;
+ /* DMA transfer is enabled. */
IsaDmaClass *k = ISADMA_GET_CLASS(fdctrl->dma);
- bool dma_mode_ok;
- /* DMA transfer are enabled. Check if DMA channel is well programmed */
- dma_mode = k->get_transfer_mode(fdctrl->dma, fdctrl->dma_chann);
- FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
- dma_mode, direction,
- (128 << fdctrl->fifo[5]) *
+
+ FLOPPY_DPRINTF("direction=%d (%d - %d)\n",
+ direction, (128 << fdctrl->fifo[5]) *
(cur_drv->last_sect - ks + 1), fdctrl->data_len);
- switch (direction) {
- case FD_DIR_SCANE:
- case FD_DIR_SCANL:
- case FD_DIR_SCANH:
- dma_mode_ok = (dma_mode == ISADMA_TRANSFER_VERIFY);
- break;
- case FD_DIR_WRITE:
- dma_mode_ok = (dma_mode == ISADMA_TRANSFER_WRITE);
- break;
- case FD_DIR_READ:
- dma_mode_ok = (dma_mode == ISADMA_TRANSFER_READ);
- break;
- case FD_DIR_VERIFY:
- dma_mode_ok = true;
- break;
- default:
- dma_mode_ok = false;
- break;
- }
- if (dma_mode_ok) {
- /* No access is allowed until DMA transfer has completed */
- fdctrl->msr &= ~FD_MSR_RQM;
- if (direction != FD_DIR_VERIFY) {
- /* Now, we just have to wait for the DMA controller to
- * recall us...
- */
- k->hold_DREQ(fdctrl->dma, fdctrl->dma_chann);
- k->schedule(fdctrl->dma);
- } else {
- /* Start transfer */
- fdctrl_transfer_handler(fdctrl, fdctrl->dma_chann, 0,
- fdctrl->data_len);
- }
- return;
+
+ /* No access is allowed until DMA transfer has completed */
+ fdctrl->msr &= ~FD_MSR_RQM;
+ if (direction != FD_DIR_VERIFY) {
+ /*
+ * Now, we just have to wait for the DMA controller to
+ * recall us...
+ */
+ k->hold_DREQ(fdctrl->dma, fdctrl->dma_chann);
+ k->schedule(fdctrl->dma);
} else {
- FLOPPY_DPRINTF("bad dma_mode=%d direction=%d\n", dma_mode,
- direction);
+ /* Start transfer */
+ fdctrl_transfer_handler(fdctrl, fdctrl->dma_chann, 0,
+ fdctrl->data_len);
}
+ return;
}
FLOPPY_DPRINTF("start non-DMA transfer\n");
fdctrl->msr |= FD_MSR_NONDMA | FD_MSR_RQM;