diff options
| author | Amadeusz Sławiński <amade@asmblr.net> | 2013-02-21 07:34:11 +0000 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2013-03-08 21:04:53 +0100 |
| commit | 987422bc4a4c6366ca6a7fbfa38a9920fd7ada2f (patch) | |
| tree | bd74c61b98681253bb0d781e190a2537ead3332d | |
| parent | e13da40448fabb0829d75b01dc57da5f44f391b3 (diff) | |
PPC: xnu kernel expects FLUSH to be cleared on STOP
otherwise it gets stuck in a loop
so clear it when unsetting run when flush is set
void
IODBDMAStop( volatile IODBDMAChannelRegisters *registers)
{
IOSetDBDMAChannelControl( registers,
IOClearDBDMAChannelControlBits( kdbdmaRun )
| IOSetDBDMAChannelControlBits( kdbdmaFlush ));
DBDMA: writel 0x0000000000000b00 <= 0xa0002000
DBDMA: channel 0x16 reg 0x0
DBDMA: status 0x00002000
while( IOGetDBDMAChannelStatus( registers) & (
kdbdmaActive | kdbdmaFlush))
eieio();
DBDMA: readl 0x0000000000000b04 => 0x00002000
DBDMA: channel 0x16 reg 0x1
DBDMA: readl 0x0000000000000b04 => 0x00002000
DBDMA: channel 0x16 reg 0x1
DBDMA: readl 0x0000000000000b04 => 0x00002000
DBDMA: channel 0x16 reg 0x1
DBDMA: readl 0x0000000000000b04 => 0x00002000
DBDMA: channel 0x16 reg 0x1
it continues to get printed
}
Signed-off-by: Amadeusz Sławiński <amade@asmblr.net>
[agraf: replace tabs with spaces]
Signed-off-by: Alexander Graf <agraf@suse.de>
| -rw-r--r-- | hw/mac_dbdma.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/hw/mac_dbdma.c b/hw/mac_dbdma.c index b894ab21aa..73d74c2c59 100644 --- a/hw/mac_dbdma.c +++ b/hw/mac_dbdma.c @@ -688,6 +688,10 @@ dbdma_control_write(DBDMA_channel *ch) if ((ch->regs[DBDMA_STATUS] & RUN) && !(status & RUN)) { /* RUN is cleared */ status &= ~(ACTIVE|DEAD); + if ((status & FLUSH) && ch->flush) { + ch->flush(&ch->io); + status &= ~FLUSH; + } } DBDMA_DPRINTF(" status 0x%08x\n", status); |