Doug / smarc-fsl-linux-kernel

19 Feb, 2009

1 commit

  • 97bef7dd0   Bernhard has moved ... Browse Code »

    Since I don't work for SUSE any more and the bwalle@suse.de address is
    invalid, correct it in the copyright headers and documentation.

    Signed-off-by: Bernhard Walle
    Cc: Greg KH
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Bernhard Walle
     

13 Aug, 2008

1 commit

  • 31bad9246   firmware/memmap: cleanup ... Browse Code »

    Various cleanup the drivers/firmware/memmap (after review by AKPM):

    - fix kdoc to conform to the standard
    - move kdoc from header to implementation files
    - remove superfluous WARN_ON() after kmalloc()
    - WARN_ON(x); if (!x) -> if(!WARN_ON(x))
    - improve some comments

    Signed-off-by: Bernhard Walle
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Bernhard Walle
     

08 Jul, 2008

1 commit

  • 69ac9cd62   sysfs: add /sys/firmware/memmap ... Browse Code »

    This patch adds /sys/firmware/memmap interface that represents the BIOS
    (or Firmware) provided memory map. The tree looks like:

    /sys/firmware/memmap/0/start (hex number)
    end (hex number)
    type (string)
    ... /1/start
    end
    type

    With the following shell snippet one can print the memory map in the same form
    the kernel prints itself when booting on x86 (the E820 map).

    --------- 8< --------------------------
    #!/bin/sh
    cd /sys/firmware/memmap
    for dir in * ; do
    start=$(cat $dir/start)
    end=$(cat $dir/end)
    type=$(cat $dir/type)
    printf "%016x-%016x (%s)\n" $start $[ $end +1] "$type"
    done
    --------- >8 --------------------------

    That patch only provides the needed interface:

    1. The sysfs interface.
    2. The structure and enumeration definition.
    3. The function firmware_map_add() and firmware_map_add_early()
    that should be called from architecture code (E820/EFI, for
    example) to add the contents to the interface.

    If the kernel is compiled without CONFIG_FIRMWARE_MEMMAP, the interface does
    nothing without cluttering the architecture-specific code with #ifdef's.

    The purpose of the new interface is kexec: While /proc/iomem represents
    the *used* memory map (e.g. modified via kernel parameters like 'memmap'
    and 'mem'), the /sys/firmware/memmap tree represents the unmodified memory
    map provided via the firmware. So kexec can:

    - use the original memory map for rebooting,
    - use the /proc/iomem for setting up the ELF core headers for kdump
    case that should only represent the memory of the system.

    The patch has been tested on i386 and x86_64.

    Signed-off-by: Bernhard Walle
    Acked-by: Greg KH
    Acked-by: Vivek Goyal
    Cc: kexec@lists.infradead.org
    Cc: yhlu.kernel@gmail.com
    Signed-off-by: Ingo Molnar

    Bernhard Walle