Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 1cbf8990 authored Dec 12, 2018 by Diana Craciun Committed by Michael Ellerman Dec 20, 2018

powerpc/fsl: Add macro to flush the branch predictor



The BUCSR register can be used to invalidate the entries in the
branch prediction mechanisms.

Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

parent 76a5eaa3

arch/powerpc/include/asm/ppc_asm.h

+10 −0

Original line number	Diff line number	Diff line
		@@ -806,4 +806,14 @@ END_FTR_SECTION_IFCLR(CPU_FTR_601)
		stringify_in_c(.long (_target) - . ;) \
		stringify_in_c(.previous)

		#ifdef CONFIG_PPC_FSL_BOOK3E
		#define BTB_FLUSH(reg) \
		lis reg,BUCSR_INIT@h; \
		ori reg,reg,BUCSR_INIT@l; \
		mtspr SPRN_BUCSR,reg; \
		isync;
		#else
		#define BTB_FLUSH(reg)
		#endif /* CONFIG_PPC_FSL_BOOK3E */

		#endif /* _ASM_POWERPC_PPC_ASM_H */