diff options
| author |   Diana Craciun <diana.craciun@nxp.com> | 2018-12-12 16:03:01 +0200 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2018-12-20 22:58:57 +1100 |
| commit | 1cbf8990d79ff69da8ad09e8a3df014e1494462b (patch) | |
| tree | 55e80dbb95860ce7a17abc25b46fd28a552fa7ce /arch/powerpc/include/asm/ppc_asm.h | |
| parent | powerpc/fsl: Add infrastructure to fixup branch predictor flush (diff) | |
| download | linux-dev-1cbf8990d79ff69da8ad09e8a3df014e1494462b.tar.xz linux-dev-1cbf8990d79ff69da8ad09e8a3df014e1494462b.zip | |
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>
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 378432995eb7..e0637730a8e7 100644 --- a/arch/powerpc/include/asm/ppc_asm.h +++ b/arch/powerpc/include/asm/ppc_asm.h @@ -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 */ |