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dbdma: set FLUSH bit upon reception of flush command for unassigned DBDMA channels 

This fixes MacOS 9 whereby it continually flushes and polls the status bits
until they are set to indicate a successful flush.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Mark Cave-Ayland 2016-07-10 19:08:57 +01:00 committed by David Gibson
parent e12f50b900
commit 894993905d
1 changed files with 10 additions and 0 deletions
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10
hw/misc/macio/mac_dbdma.c
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@ -783,8 +783,18 @@ static void dbdma_unassigned_rw(DBDMA_io *io)
static void dbdma_unassigned_flush(DBDMA_io *io)
{
DBDMA_channel *ch = io->channel;
dbdma_cmd *current = &ch->current;
uint16_t cmd;
qemu_log_mask(LOG_GUEST_ERROR, "%s: use of unassigned channel %d\n",
__func__, ch->channel);
cmd = le16_to_cpu(current->command) & COMMAND_MASK;
if (cmd == OUTPUT_MORE || cmd == OUTPUT_LAST ||
cmd == INPUT_MORE || cmd == INPUT_LAST) {
current->xfer_status = cpu_to_le16(ch->regs[DBDMA_STATUS] | FLUSH);
current->res_count = cpu_to_le16(io->len);
dbdma_cmdptr_save(ch);
}
}
void* DBDMA_init (MemoryRegion **dbdma_mem)