* Walnut 405GP and a 3com 905
@ 2001-03-14 22:53 andrew may
2001-03-15 3:34 ` Walnut 405GP and a 3com 905 (PCI slot0 J31) andrew may
0 siblings, 1 reply; 3+ messages in thread
From: andrew may @ 2001-03-14 22:53 UTC (permalink / raw)
To: linuxppc-embedded; +Cc: Frank Rowand
Anyone try to use a 3com NIC card on the Walnut board?
I can load the module but when I try to bring up the
interface I get a stream of bus errors.
eth1: using NWAY autonegotiation
eth1: Host error, FIFO diagnostic register 0000.
eth1: PCI bus error, bus status 80000020
eth1: using NWAY autonegotiation
eth1: Host error, FIFO diagnostic register 0000.
eth1: PCI bus error, bus status 80000020
eth1: using NWAY autonegotiation
eth1: Host error, FIFO diagnostic register 0000.
I am using the 2.4.2 version of the Walnut kernel dated
Mar 1 on the ftp site.
There are changes to the 3com driver in the pre patches
but I have not tried it yet.
Most docs say this is a hardware failure so I might want
to change the PCI slot I am using.
Has anyone successfully used a PCI network card in the
Walnut board.
If it is just a driver bug I do not want to spend time
fixing it, I would just want to get a card that works.
I just want to do some perf testing on board itself.
Thanks
--
Andrew May
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Walnut 405GP and a 3com 905 (PCI slot0 J31)
2001-03-14 22:53 Walnut 405GP and a 3com 905 andrew may
@ 2001-03-15 3:34 ` andrew may
2001-03-15 22:30 ` detect idle and suspend the CPU Nguyen Xuan Hoang
0 siblings, 1 reply; 3+ messages in thread
From: andrew may @ 2001-03-15 3:34 UTC (permalink / raw)
To: linuxppc-embedded; +Cc: Frank Rowand
Well switching the card to J25 PCI Slot 3 seems to solve
the problem.
I was using J31 Slot 0. The docs on the board say that this
slot can be used with a 3.3v card at 66MHz if the connector
is reversed.
Since the connector on my board is in the 5v config, I
would hope the programming resistors were shipped in
the correct config, but I did not check.
So I don't know what the problem was and I don't really
care, but I will just stay away from using J31 for now.
On Wed, Mar 14, 2001 at 02:53:58PM -0800, andrew may wrote:
>
> Anyone try to use a 3com NIC card on the Walnut board?
>
> I can load the module but when I try to bring up the
> interface I get a stream of bus errors.
>
> eth1: using NWAY autonegotiation
> eth1: Host error, FIFO diagnostic register 0000.
> eth1: PCI bus error, bus status 80000020
> eth1: using NWAY autonegotiation
> eth1: Host error, FIFO diagnostic register 0000.
> eth1: PCI bus error, bus status 80000020
> eth1: using NWAY autonegotiation
> eth1: Host error, FIFO diagnostic register 0000.
>
> I am using the 2.4.2 version of the Walnut kernel dated
> Mar 1 on the ftp site.
>
> There are changes to the 3com driver in the pre patches
> but I have not tried it yet.
>
> Most docs say this is a hardware failure so I might want
> to change the PCI slot I am using.
>
> Has anyone successfully used a PCI network card in the
> Walnut board.
>
> If it is just a driver bug I do not want to spend time
> fixing it, I would just want to get a card that works.
>
> I just want to do some perf testing on board itself.
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
^ permalink raw reply [flat|nested] 3+ messages in thread
* detect idle and suspend the CPU
2001-03-15 3:34 ` Walnut 405GP and a 3com 905 (PCI slot0 J31) andrew may
@ 2001-03-15 22:30 ` Nguyen Xuan Hoang
0 siblings, 0 replies; 3+ messages in thread
From: Nguyen Xuan Hoang @ 2001-03-15 22:30 UTC (permalink / raw)
To: linuxppc-embedded
Hi,
I am writting a code to automatically suspend the CPU (MPC823) and system
after it goes idle a few minutes.
I try to modify the idled() function in /arch/ppc/kernel/idle.c to count if
the CPU running in this code more than 5 minutes without reschedule , so I
will consider it idle.
for(;;)
{
if(work) start_idle = jiffies;
if(jiffies - start_idle > HARD_IDLE_TIMEOUT) {
detect_idle(); // suspend CPU here
}
work = current->need_resched;
__sti();
check_pgt_cache();
....
}
However just after every 20s, the current->need_resched turn on, as a result
I can not detect the system idle (I already kill all process, excepet
init,kupdate,bdflush,sh).
I found out the init will automatically wake up after 20s.
My question is:
1. How the Linux Kernel for PC do this? I can see PC will automatically
suspend after 15 minutes.
2. Where should be the best place to put the suspend code ? (in idled() ?)
3. Is there anyone have implemented this feature for MPC823, where can I get
the information?
Thank in advances
Jerry
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2001-03-15 22:30 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2001-03-14 22:53 Walnut 405GP and a 3com 905 andrew may
2001-03-15 3:34 ` Walnut 405GP and a 3com 905 (PCI slot0 J31) andrew may
2001-03-15 22:30 ` detect idle and suspend the CPU Nguyen Xuan Hoang
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox