Date: Mon, 21 Nov 2005 14:31:29 -0500 From: John Baldwin <jhb@freebsd.org> To: freebsd-sparc64@freebsd.org Cc: sparc64@freebsd.org Subject: Re: uart(4) busted on sparc64 now? Message-ID: <200511211431.31051.jhb@freebsd.org> In-Reply-To: <200511211422.57431.jhb@freebsd.org> References: <200511211422.57431.jhb@freebsd.org>
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On Monday 21 November 2005 02:22 pm, John Baldwin wrote:
> So on Friday I updated my ultra60 to HEAD. It had been running HEAD from
> about a month ago. Today I came in and rebooted into the new kernel and
> now it hangs probing uart1 off of a PUC device. Note that I do not have a
> keyboard and mouse plugged into this box.
>
> New dmesg:
>
> puc0: <Siemens SAB 82532 dual channel SCC> addr 0x1400400000-0x140040007f
> irq 43 on ebus0 uart0: <SAB 82532 v3.2, channel A> on puc0
> uart0: CTS oflow
> uart0: console (9600,n,8,1)
> uart1: <SAB 82532 v3.2, channel B> on puc0
> <hang>
Looks like maybe it is spinning here:
sab82532_bus_setsig(struct uart_softc *sc, int sig)
{
struct uart_bas *bas;
uint32_t new, old;
uint8_t mode, pvr;
bas = &sc->sc_bas;
do {
old = sc->sc_hwsig;
new = old;
if (sig & SER_DDTR) {
SIGCHG(sig & SER_DTR, new, SER_DTR,
SER_DDTR);
}
if (sig & SER_DRTS) {
SIGCHG(sig & SER_RTS, new, SER_RTS,
SER_DRTS);
}
} while (!atomic_cmpset_32(&sc->sc_hwsig, old, new));
[halt - sent]
KDB: enter: Line break on console
[thread pid 0 tid 0 ]
Stopped at kdb_enter+0x3c: ta %xcc, 1
db> tr
Tracing pid 0 tid 0 td 0xc035a1f8
uart_intr_break() at uart_intr_break+0x24
uart_intr() at uart_intr+0x94
puc_intr() at puc_intr+0x54
psycho_intr_stub() at psycho_intr_stub+0x8
intr_execute_handlers() at intr_execute_handlers+0x78
intr_fast() at intr_fast+0x7c
-- interrupt level=0xd pil=0 %o7=0xc00ddb5c --
sab82532_bus_setsig() at sab82532_bus_setsig+0xa0
sab82532_bus_attach() at sab82532_bus_attach+0xf0
uart_bus_attach() at uart_bus_attach+0x2d4
...
--
John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve" = http://www.FreeBSD.org
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