On Feb 16, 2012, at 8:49 PM, Jia Hongtao wrote: > Some MPIC implementations contain one or more blocks of message registers > that are used to send messages between cores via IPIs. A simple API has > been added to access (get/put, read, write, etc ...) these message registers. > The available message registers are initially discovered via nodes in the > device tree. A separate commit contains a binding for the message register > nodes. > > Signed-off-by: Meador Inge <meador_i...@mentor.com> > Signed-off-by: Jia Hongtao <b38...@freescale.com> > Signed-off-by: Li Yang <le...@freescale.com> > --- > This patch is an update for : http://patchwork.ozlabs.org/patch/98075/ > > Meador Inge addressed the following points from Ben's feedback: > * Drop the 'mpic_msgr.msr' field. > * Drop the 'mpic_msgr.mer' field in favor of address arithmetic off of > 'mpic_msgr.addr'. > * Document the API. > * Disable MPIC register in 'mpic_msgr_put'. > * Put locking in 'mpic_msgr_disable'. > * s/EXPORT_SYMBOL/EXPORT_SYMBOL_GPL/g. > * Make 'mpic_msgr_write' and 'mpic_msgr_read' 'static inline'. > > I just fixed the checkpatch errors and addressed the following item: > * In 'mpic_msgr_set_destination' have a wrapper that goes from Linux > CPU number to HW CPU number. > > arch/powerpc/include/asm/mpic_msgr.h | 132 ++++++++++++++++ > arch/powerpc/platforms/Kconfig | 8 + > arch/powerpc/sysdev/Makefile | 2 + > arch/powerpc/sysdev/mpic_msgr.c | 282 ++++++++++++++++++++++++++++++++++ > 4 files changed, 424 insertions(+), 0 deletions(-) > create mode 100644 arch/powerpc/include/asm/mpic_msgr.h > create mode 100644 arch/powerpc/sysdev/mpic_msgr.c
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