On Thu, Apr 10, 2014 at 06:56:51PM +0200, Andrew Jones wrote:
> Architecture neutral code may need to call low-level io accessors,
> or use spinlocks. Create a generic io.h to ensure those accessors
> are defined, and a generic spinlock.h that complains when included,
> as we can't write a generic spinlock. These files can be overridden
> or extended by architecture specific versions placed in
> lib/$ARCH/asm/.
>
> Signed-off-by: Andrew Jones <drjones@xxxxxxxxxx>
> ---
> v4: introduce lib/asm symlink to get rid of #ifdef __arm__,
> add spinlock.h too
> v3: wrt to io.h (was libio.[ch]) only
> - get rid of CONFIG_64BIT, replace with asserts
> - get rid of {read,write}_len() [libio.c]
> - fix bad *64_to_cpu macros
> ---
> .gitignore | 1 +
> Makefile | 6 +-
> configure | 11 ++++
> lib/asm-generic/io.h | 154 +++++++++++++++++++++++++++++++++++++++++++++
> lib/asm-generic/spinlock.h | 4 ++
> 5 files changed, 173 insertions(+), 3 deletions(-)
> create mode 100644 lib/asm-generic/io.h
> create mode 100644 lib/asm-generic/spinlock.h
>
> diff --git a/.gitignore b/.gitignore
> index 775d0dfd8263e..e21939a8771e9 100644
> --- a/.gitignore
> +++ b/.gitignore
> @@ -9,6 +9,7 @@ patches
> .stgit-*
> cscope.*
> *.swp
> +/lib/asm
> /config.mak
> /*-run
> /test.log
> diff --git a/Makefile b/Makefile
> index fba58e36f272f..51cacdac00615 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -76,11 +76,11 @@ libfdt_clean:
> $(LIBFDT_objdir)/.*.d
>
> distclean: clean libfdt_clean
> - $(RM) config.mak $(TEST_DIR)-run test.log msr.out cscope.*
> + $(RM) lib/asm config.mak $(TEST_DIR)-run test.log msr.out cscope.*
>
> -cscope: common_dirs = lib lib/libfdt
> +cscope: common_dirs = lib lib/libfdt lib/asm lib/asm-generic
> cscope:
> $(RM) ./cscope.*
> - find $(TEST_DIR) lib/$(TEST_DIR) $(common_dirs) -maxdepth 1 \
> + find -L $(TEST_DIR) lib/$(TEST_DIR) $(common_dirs) -maxdepth 1 \
> -name '*.[chsS]' -print | sed 's,^\./,,' > ./cscope.files
> cscope -bk
> diff --git a/configure b/configure
> index 6cfc64943f6e6..8a81bf92e27b7 100755
> --- a/configure
> +++ b/configure
> @@ -95,6 +95,17 @@ if [ $exit -eq 0 ]; then
> fi
> rm -f lib_test.c
>
> +# link lib/asm for the architecture
> +rm -f lib/asm
> +asm=asm-generic
> +if [ -d lib/$arch/asm ]; then
> + asm=$arch/asm
> +elif [ -d lib/$testdir/asm ]; then
> + asm=$testdir/asm
why do you need this elif? can you not make sure arch is always set?
> +fi
> +ln -s $asm lib/asm
> +
> +# create the config
> cat <<EOF > config.mak
> PREFIX=$prefix
> KERNELDIR=$(readlink -f $kerneldir)
[...]
-Christoffer
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