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| author | Diana Craciun <diana.craciun@nxp.com> | 2019-03-29 14:26:09 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-03 07:26:19 +0300 |
| commit | 4944f1d48d7117e9766db8953d0855bfede939e6 (patch) | |
| tree | 5dc30c02eec77f29532af5843b58e8ff5cabaf85 /arch/powerpc/include/asm/ppc_asm.h | |
| parent | d67ab3d9a1b7e4dbee0db0f133611de3a22d5517 (diff) | |
| download | linux-4944f1d48d7117e9766db8953d0855bfede939e6.tar.xz | |
powerpc/fsl: Add macro to flush the branch predictor
commit 1cbf8990d79ff69da8ad09e8a3df014e1494462b upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/powerpc/include/asm/ppc_asm.h')
| -rw-r--r-- | arch/powerpc/include/asm/ppc_asm.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h index b5d023680801..5c901bf4c505 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 */ |