All of lore.kernel.org
 help / color / mirror / Atom feed
From: Chris Packham <cp.packham@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PPC] get_timer without CONFIG_INTERRUPTS
Date: Mon, 30 Sep 2013 21:22:01 +1300	[thread overview]
Message-ID: <524934A9.8000309@gmail.com> (raw)

Hi,

Has anyone looked at a way of implementing get_timer for PowerPC without
using interrupts.

We appear to be having a problem with common/usb_hub.c where
occasionally (1 in ~150 reboots) we seem to get stuck in the do/while
loop in usb_hub_configure. It looks like this should timeout but because
we don't define CONFIG_INTERRUPTS get_timer() will only ever return 0.

I'm being a little paranoid (perhaps too paranoid) about turning on
CONFIG_INTERRUPTS. Looking at the code I can't see too much that would
cause problems but I want to avoid a rogue LBC or PCI-e interrupt
locking up the CPU.

Thanks,
Chris

             reply	other threads:[~2013-09-30  8:22 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-09-30  8:22 Chris Packham [this message]
2013-10-02  7:36 ` [U-Boot] [PPC] get_timer without CONFIG_INTERRUPTS Chris Packham
2013-10-02  9:01   ` Wolfgang Denk

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=524934A9.8000309@gmail.com \
    --to=cp.packham@gmail.com \
    --cc=u-boot@lists.denx.de \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.