diff options
Diffstat (limited to 'arch/arm/include/asm/tlbflush.h')
| -rw-r--r-- | arch/arm/include/asm/tlbflush.h | 48 |
1 files changed, 31 insertions, 17 deletions
diff --git a/arch/arm/include/asm/tlbflush.h b/arch/arm/include/asm/tlbflush.h index def9e57..3896026 100644 --- a/arch/arm/include/asm/tlbflush.h +++ b/arch/arm/include/asm/tlbflush.h @@ -560,6 +560,37 @@ static inline void __flush_bp_all(void) asm("mcr p15, 0, %0, c7, c1, 6" : : "r" (zero)); } +#include <asm/cputype.h> +#ifdef CONFIG_ARM_ERRATA_798181 +static inline int erratum_a15_798181(void) +{ + unsigned int midr = read_cpuid_id(); + + /* Cortex-A15 r0p0..r3p2 affected */ + if ((midr & 0xff0ffff0) != 0x410fc0f0 || midr > 0x413fc0f2) + return 0; + return 1; +} + +static inline void dummy_flush_tlb_a15_erratum(void) +{ + /* + * Dummy TLBIMVAIS. Using the unmapped address 0 and ASID 0. + */ + asm("mcr p15, 0, %0, c8, c3, 1" : : "r" (0)); + dsb(ish); +} +#else +static inline int erratum_a15_798181(void) +{ + return 0; +} + +static inline void dummy_flush_tlb_a15_erratum(void) +{ +} +#endif + /* * flush_pmd_entry * @@ -666,21 +697,4 @@ extern void flush_bp_all(void); #endif -#ifndef __ASSEMBLY__ -#ifdef CONFIG_ARM_ERRATA_798181 -extern void erratum_a15_798181_init(void); -#else -static inline void erratum_a15_798181_init(void) {} -#endif -extern bool (*erratum_a15_798181_handler)(void); - -static inline bool erratum_a15_798181(void) -{ - if (unlikely(IS_ENABLED(CONFIG_ARM_ERRATA_798181) && - erratum_a15_798181_handler)) - return erratum_a15_798181_handler(); - return false; -} -#endif - #endif |