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Commit 0150a3dd authored by Michael Ellerman's avatar Michael Ellerman Committed by Benjamin Herrenschmidt
Browse files

powerpc: Add real mode cache inhibited IO accessors 



These accessors allow us to do cache inhibited accesses when in real
mode. They should only be used in real mode.

Signed-off-by: default avatarMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent fb48dc22

arch/powerpc/include/asm/io.h

+16 −0
Original line number Diff line number Diff line
@@ -191,8 +191,24 @@ DEF_MMIO_OUT_D(out_le32, 32, stw); 


#endif /* __BIG_ENDIAN */



/*

 * Cache inhibitied accessors for use in real mode, you don't want to use these

 * unless you know what you're doing.

 *

 * NB. These use the cpu byte ordering.

 */

DEF_MMIO_OUT_X(out_rm8,   8, stbcix);

DEF_MMIO_OUT_X(out_rm16, 16, sthcix);

DEF_MMIO_OUT_X(out_rm32, 32, stwcix);

DEF_MMIO_IN_X(in_rm8,   8, lbzcix);

DEF_MMIO_IN_X(in_rm16, 16, lhzcix);

DEF_MMIO_IN_X(in_rm32, 32, lwzcix);



#ifdef __powerpc64__



DEF_MMIO_OUT_X(out_rm64, 64, stdcix);

DEF_MMIO_IN_X(in_rm64, 64, ldcix);



#ifdef __BIG_ENDIAN__

DEF_MMIO_OUT_D(out_be64, 64, std);

DEF_MMIO_IN_D(in_be64, 64, ld);