Eric Lee / smarc-fsl-linux-kernel

03 Jun, 2011

1 commit

31 Mar, 2011

1 commit

04 Mar, 2011

1 commit

23 May, 2010

2 commits

  • 648eee52c   Blackfin: optimize strncpy a bit ... Browse Code »

    Add a little strncpy optimization which can easily cut boot time by 20%.

    When the kernel is booting with initramfs, it builds up the filesystem
    from a cpio archive by calling strncpy_from_user() via fs/namei.c's
    do_getname() on every file in the archive (which can be lots) with a
    length of PATH_MAX (1024). This causes the dest of the strncpy to be
    padded with many NUL bytes.

    This optimization mostly causes these NUL bytes to be padded with a call
    to memset() which is already optimized for filling memory quickly, but
    the hardware loop helps a little bit as well.

    Boot time measured with 'loglevel=0' so UART speed doesn't get in the way.

    Signed-off-by: Robin Getz
    Signed-off-by: Mike Frysinger

    Robin Getz
     
  • 479ba6035   Blackfin: move string functions to normal lib/ assembly ... Browse Code »

    Since 'extern inline' doesn't work correctly in the context of the Linux
    kernel (too many overriding defines), move the string functions to normal
    lib/ assembly files (like the existing mem funcs). This avoids the forced
    inline all over the kernel and allows us to place them constantly in L1.

    This also avoids some module failures when gcc inserts calls to string
    functions but the kernel build system doesn't fully consult the library
    archives.

    Signed-off-by: Robin Getz
    Signed-off-by: Mike Frysinger

    Robin Getz
     

15 Dec, 2009

1 commit

07 Oct, 2009

1 commit

  • 96f1050d3   Blackfin: mass clean up of copyright/licensing info ... Browse Code »

    Bill Gatliff & David Brownell pointed out we were missing some
    copyrights, and licensing terms in some of the files in
    ./arch/blackfin, so this fixes things, and cleans them up.

    It also removes:
    - verbose GPL text(refer to the top level ./COPYING file)
    - file names (you are looking at the file)
    - bug url (it's in the ./MAINTAINERS file)
    - "or later" on GPL-2, when we did not have that right

    It also allows some Blackfin-specific assembly files to be under a BSD
    like license (for people to use them outside of Linux).

    Signed-off-by: Robin Getz
    Signed-off-by: Mike Frysinger

    Robin Getz
     

17 Sep, 2009

1 commit

  • b9c7eb498   Blackfin: fix misnomer of some I-pipe helpers ... Browse Code »

    __ipipe_{stall, unstall}_root_raw() identifiers may leave the reader
    under the impression that only the virtual state is affected by these
    operations, which is wrong. Pick names following the convention used
    throughout the interrupt pipeline code.

    Signed-off-by: Philippe Gerum
    Signed-off-by: Mike Frysinger

    Philippe Gerum
     

16 Jul, 2009

1 commit

  • 8399a74f6   Blackfin: fix miscompilation in lshrdi3 ... Browse Code »

    The code used in the Blackfin lshrdi3 utilizes gcc constructs. However,
    the structures declared don't line up with the code gcc generates, so
    under certain optimizations, we get bad code and things crap out in fun
    random ways. So rather than trying to maintain different gcc definitions
    ourselves, just use the ones available in gcclib.h.

    URL: http://blackfin.uclinux.org/gf/tracker/5286
    Signed-off-by: Jie Zhang
    Signed-off-by: Mike Frysinger

    Jie Zhang
     

13 Jun, 2009

1 commit

27 May, 2009

1 commit

  • add8a5050   Blackfin: fix strncmp.o build error ... Browse Code »

    Fix some more fallout of the string changes:

    CC arch/blackfin/lib/strncmp.o
    In file included from include/linux/bitmap.h:9,
    from include/linux/nodemask.h:90,
    from include/linux/mmzone.h:17,
    from include/linux/gfp.h:5,
    from include/linux/kmod.h:23,
    from include/linux/module.h:14,
    from arch/blackfin/lib/strncmp.c:14:
    include/linux/string.h: In function ‘strstarts’:
    include/linux/string.h:132: error: implicit declaration of function ‘strncmp’
    make[1]: *** [arch/blackfin/lib/strncmp.o] Error 1

    Signed-off-by: Mike Frysinger
    CC: Rusty Russell

    Mike Frysinger
     

07 Jan, 2009

3 commits

28 Oct, 2008

1 commit

14 Aug, 2008

1 commit

20 May, 2008

1 commit

17 May, 2008

1 commit

12 May, 2008

1 commit

  • 45b3947c2   [Blackfin] arch: Blackfin checksum annotations ... Browse Code »

    FSVOtest in this case, since I don't have the hardware...
    However, all changes seen by gcc are actually
    - explicit cast to unsigned short in return expression of functions
    returning unsigned short
    - csum_fold() return type changed from unsigned int to __sum16
    (unsigned short), same as for all other architecture and as net/* expects;
    expression actually returned is ((~(sum << 16)) >> 16) with sum being
    unsigned 32bit, so it's (a) going to fit into the range of unsigned short
    and (b) had been unsigned all along, so no sign expansion mess happened.

    Tested-by: Bryan Wu
    Signed-off-by: Al Viro
    Signed-off-by: David Miller
    Signed-off-by: Bryan Wu

    Al Viro
     

21 Dec, 2007

1 commit

23 Nov, 2007

1 commit

21 Nov, 2007

1 commit

17 Nov, 2007

1 commit

  • 5c91fb902   Blackfin arch: Add assembly function insl_16 ... Browse Code »

    /*
    * CPUs often take a performance hit when accessing unaligned memory
    * locations. The actual performance hit varies, it can be small if the
    * hardware handles it or large if we have to take an exception and fix
    * it
    * in software.
    *
    * Since an ethernet header is 14 bytes network drivers often end up
    * with
    * the IP header at an unaligned offset. The IP header can be aligned by
    * shifting the start of the packet by 2 bytes. Drivers should do this
    * with:
    *
    * skb_reserve(NET_IP_ALIGN);
    *
    * The downside to this alignment of the IP header is that the DMA is
    * now
    * unaligned. On some architectures the cost of an unaligned DMA is high
    * and this cost outweighs the gains made by aligning the IP header.
    *
    * Since this trade off varies between architectures, we allow
    * NET_IP_ALIGN
    * to be overridden.
    */

    This new function insl_16 allows to read form 32-bit IO and writes to
    16-bit aligned memory. This is useful in above described scenario -
    In particular with the AXIS AX88180 Gigabit Ethernet MAC.
    Once the device is in 32-bit mode, reads from the RX FIFO always
    decrements 4bytes.
    While on the other side the destination address in SDRAM is always
    16-bit aligned.
    If we use skb_reserve(0) the receive buffer is 32-bit aligned but later
    we hit a unaligned exception in the IP code.

    Signed-off-by: Michael Hennerich
    Signed-off-by: Bryan Wu

    Michael Hennerich
     

21 Oct, 2007

1 commit

25 Jul, 2007

1 commit

12 Jul, 2007

1 commit

21 Jun, 2007

1 commit

11 Jun, 2007

1 commit

22 May, 2007

1 commit

08 May, 2007

1 commit

  • 1394f0322   blackfin architecture ... Browse Code »

    This adds support for the Analog Devices Blackfin processor architecture, and
    currently supports the BF533, BF532, BF531, BF537, BF536, BF534, and BF561
    (Dual Core) devices, with a variety of development platforms including those
    avaliable from Analog Devices (BF533-EZKit, BF533-STAMP, BF537-STAMP,
    BF561-EZKIT), and Bluetechnix! Tinyboards.

    The Blackfin architecture was jointly developed by Intel and Analog Devices
    Inc. (ADI) as the Micro Signal Architecture (MSA) core and introduced it in
    December of 2000. Since then ADI has put this core into its Blackfin
    processor family of devices. The Blackfin core has the advantages of a clean,
    orthogonal,RISC-like microprocessor instruction set. It combines a dual-MAC
    (Multiply/Accumulate), state-of-the-art signal processing engine and
    single-instruction, multiple-data (SIMD) multimedia capabilities into a single
    instruction-set architecture.

    The Blackfin architecture, including the instruction set, is described by the
    ADSP-BF53x/BF56x Blackfin Processor Programming Reference
    http://blackfin.uclinux.org/gf/download/frsrelease/29/2549/Blackfin_PRM.pdf

    The Blackfin processor is already supported by major releases of gcc, and
    there are binary and source rpms/tarballs for many architectures at:
    http://blackfin.uclinux.org/gf/project/toolchain/frs There is complete
    documentation, including "getting started" guides available at:
    http://docs.blackfin.uclinux.org/ which provides links to the sources and
    patches you will need in order to set up a cross-compiling environment for
    bfin-linux-uclibc

    This patch, as well as the other patches (toolchain, distribution,
    uClibc) are actively supported by Analog Devices Inc, at:
    http://blackfin.uclinux.org/

    We have tested this on LTP, and our test plan (including pass/fails) can
    be found at:
    http://docs.blackfin.uclinux.org/doku.php?id=testing_the_linux_kernel

    [m.kozlowski@tuxland.pl: balance parenthesis in blackfin header files]
    Signed-off-by: Bryan Wu
    Signed-off-by: Mariusz Kozlowski
    Signed-off-by: Aubrey Li
    Signed-off-by: Jie Zhang
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Bryan Wu