Logan Gunthorpe <[email protected]> writes: > In order to provide non-atomic functions for io{read|write}64 that will > use readq and writeq when appropriate. We define a number of variants > of these functions in the generic iomap that will do non-atomic > operations on pio but atomic operations on mmio. > > These functions are only defined if readq and writeq are defined. If > they are not, then the wrappers that always use non-atomic operations > from include/linux/io-64-nonatomic*.h will be used. > > Signed-off-by: Logan Gunthorpe <[email protected]> > Reviewed-by: Andy Shevchenko <[email protected]> > Cc: Benjamin Herrenschmidt <[email protected]> > Cc: Paul Mackerras <[email protected]> > Cc: Michael Ellerman <[email protected]> > Cc: Arnd Bergmann <[email protected]> > Cc: Suresh Warrier <[email protected]> > Cc: Nicholas Piggin <[email protected]> > --- > arch/powerpc/include/asm/io.h | 2 + > include/asm-generic/iomap.h | 22 ++++++ > lib/iomap.c | 132 ++++++++++++++++++++++++++++++++++ > 3 files changed, 156 insertions(+) > > diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h > index e0331e754568..20fe5d7515db 100644 > --- a/arch/powerpc/include/asm/io.h > +++ b/arch/powerpc/include/asm/io.h > @@ -798,8 +798,10 @@ extern void __iounmap_at(void *ea, unsigned long size); > > #define mmio_read16be(addr) readw_be(addr) > #define mmio_read32be(addr) readl_be(addr) > +#define mmio_read64be(addr) readq_be(addr) > #define mmio_write16be(val, addr) writew_be(val, addr) > #define mmio_write32be(val, addr) writel_be(val, addr) > +#define mmio_write64be(val, addr) writeq_be(val, addr) > #define mmio_insb(addr, dst, count) readsb(addr, dst, count) > #define mmio_insw(addr, dst, count) readsw(addr, dst, count) > #define mmio_insl(addr, dst, count) readsl(addr, dst, count)
For the powerpc part: Acked-by: Michael Ellerman <[email protected]> (powerpc) cheers
