diff options
Diffstat (limited to 'hw/block/fdc.c')
-rw-r--r-- | hw/block/fdc.c | 61 |
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; |