From mboxrd@z Thu Jan  1 00:00:00 1970
From: erik quanstrom <quanstro@quanstro.net>
Date: Thu, 12 Nov 2009 16:28:19 -0500
To: 9fans@9fans.net
Message-ID: <69b90fbc1b4d91ea80d8bcf5f07e55d6@ladd.quanstro.net>
In-Reply-To: <<8ccc8ba40911121034m484fdd72qd2c246ecc67bfd28@mail.gmail.com>>
References: <<8ccc8ba40911121034m484fdd72qd2c246ecc67bfd28@mail.gmail.com>>
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Subject: Re: [9fans] usbd and boot
Topicbox-Message-UUID: 9a422a34-ead5-11e9-9d60-3106f5b1d025

On Thu Nov 12 13:36:19 EST 2009, nemo@lsub.org wrote:
> I tried this on one machine and it worked.
> I'll keep trying to see if that's just that machine which works.
>
> I'd like to get debug output (usbdebug=2) for a machine hang.

last bit of output
uhci 0xc400 setting run to 1
uhci 0xc400 cmd 0x1 sts 0x0
uhci init: cmd 0x1 sts 0x0 sof 0x50 flb 0x5a000 frno 0x0 psc0 psc1 0x80

i added some debugging to determine that one actually finishes
the routine and returns to usbinit in devusb.c.  on my screen
i see hub 0, 1, 2, 3, 6 on my screen.  there's some stuff that's
scrolled off.

it appears to be hanging on a context switch or in an interrupt.
perhaps even an smi interrupt.

- erik