Eric Lee / smarc-fsl-linux-kernel

30 Jan, 2008

1 commit

  • f212ec4b7   x86: early boot debugging via FireWire (ohci1394_dma=early) ... Browse Code »

    This patch adds a new configuration option, which adds support for a new
    early_param which gets checked in arch/x86/kernel/setup_{32,64}.c:setup_arch()
    to decide wether OHCI-1394 FireWire controllers should be initialized and
    enabled for physical DMA access to allow remote debugging of early problems
    like issues ACPI or other subsystems which are executed very early.

    If the config option is not enabled, no code is changed, and if the boot
    paramenter is not given, no new code is executed, and independent of that,
    all new code is freed after boot, so the config option can be even enabled
    in standard, non-debug kernels.

    With specialized tools, it is then possible to get debugging information
    from machines which have no serial ports (notebooks) such as the printk
    buffer contents, or any data which can be referenced from global pointers,
    if it is stored below the 4GB limit and even memory dumps of of the physical
    RAM region below the 4GB limit can be taken without any cooperation from the
    CPU of the host, so the machine can be crashed early, it does not matter.

    In the extreme, even kernel debuggers can be accessed in this way. I wrote
    a small kgdb module and an accompanying gdb stub for FireWire which allows
    to gdb to talk to kgdb using remote remory reads and writes over FireWire.

    An version of the gdb stub fore FireWire is able to read all global data
    from a system which is running a a normal kernel without any kernel debugger,
    without any interruption or support of the system's CPU. That way, e.g. the
    task struct and so on can be read and even manipulated when the physical DMA
    access is granted.

    A HOWTO is included in this patch, in Documentation/debugging-via-ohci1394.txt
    and I've put a copy online at
    ftp://ftp.suse.de/private/bk/firewire/docs/debugging-via-ohci1394.txt

    It also has links to all the tools which are available to make use of it
    another copy of it is online at:
    ftp://ftp.suse.de/private/bk/firewire/kernel/ohci1394_dma_early-v2.diff

    Signed-Off-By: Bernhard Kaindl
    Tested-By: Thomas Renninger
    Signed-off-by: Ingo Molnar
    Signed-off-by: Thomas Gleixner

    Bernhard Kaindl
     

09 Feb, 2007

1 commit

  • e658bc556   the scheduled IEEE1394_OUI_DB removal ... Browse Code »

    This patch contains the scheduled IEEE1394_OUI_DB removal.

    Signed-off-by: Adrian Bunk

    Update: Also remove drivers/ieee1394/.gitignore.
    Remove now unused struct members in drivers/ieee1394/nodemgr.h.

    Signed-off-by: Stefan Richter

    Adrian Bunk
     

08 Dec, 2006

1 commit

18 Nov, 2005

1 commit

  • 7301c8d3a   Remove amdtp, cmp drivers. ... Browse Code »

    Remove the Audio and Music Data Transmission Protocol driver and the
    Connection Management Procedures driver. These are incomplete, have never
    worked, and are better implemented in userland via raw1394 (see
    http://freebob.sourceforge.net/ for example.)

    Signed-off-by: Jody McIntyre
    Cc: Adrian Bunk

    Jody McIntyre
     

17 Apr, 2005

1 commit

  • 1da177e4c   Linux-2.6.12-rc2 ... Browse Code »

    Initial git repository build. I'm not bothering with the full history,
    even though we have it. We can create a separate "historical" git
    archive of that later if we want to, and in the meantime it's about
    3.2GB when imported into git - space that would just make the early
    git days unnecessarily complicated, when we don't have a lot of good
    infrastructure for it.

    Let it rip!

    Linus Torvalds