The BUCSR register can be used to invalidate the entries in the branch prediction mechanisms.
Signed-off-by: Diana Craciun <diana.crac...@nxp.com> --- v1-->v2 - no change arch/powerpc/include/asm/ppc_asm.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h index b5d0236..5c901bf 100644 --- a/arch/powerpc/include/asm/ppc_asm.h +++ b/arch/powerpc/include/asm/ppc_asm.h @@ -821,4 +821,14 @@ 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 */ -- 2.5.5