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Diffstat (limited to '')
-rw-r--r-- | arch/powerpc/include/asm/book3s/32/tlbflush.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/book3s/32/tlbflush.h b/arch/powerpc/include/asm/book3s/32/tlbflush.h new file mode 100644 index 000000000..ba1743c52 --- /dev/null +++ b/arch/powerpc/include/asm/book3s/32/tlbflush.h @@ -0,0 +1,82 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_POWERPC_BOOK3S_32_TLBFLUSH_H +#define _ASM_POWERPC_BOOK3S_32_TLBFLUSH_H + +#define MMU_NO_CONTEXT (0) +/* + * TLB flushing for "classic" hash-MMU 32-bit CPUs, 6xx, 7xx, 7xxx + */ +void hash__flush_tlb_mm(struct mm_struct *mm); +void hash__flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr); +void hash__flush_range(struct mm_struct *mm, unsigned long start, unsigned long end); + +#ifdef CONFIG_SMP +void _tlbie(unsigned long address); +#else +static inline void _tlbie(unsigned long address) +{ + asm volatile ("tlbie %0; sync" : : "r" (address) : "memory"); +} +#endif +void _tlbia(void); + +/* + * Called at the end of a mmu_gather operation to make sure the + * TLB flush is completely done. + */ +static inline void tlb_flush(struct mmu_gather *tlb) +{ + /* 603 needs to flush the whole TLB here since it doesn't use a hash table. */ + if (!mmu_has_feature(MMU_FTR_HPTE_TABLE)) + _tlbia(); +} + +static inline void flush_range(struct mm_struct *mm, unsigned long start, unsigned long end) +{ + start &= PAGE_MASK; + if (mmu_has_feature(MMU_FTR_HPTE_TABLE)) + hash__flush_range(mm, start, end); + else if (end - start <= PAGE_SIZE) + _tlbie(start); + else + _tlbia(); +} + +static inline void flush_tlb_mm(struct mm_struct *mm) +{ + if (mmu_has_feature(MMU_FTR_HPTE_TABLE)) + hash__flush_tlb_mm(mm); + else + _tlbia(); +} + +static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr) +{ + if (mmu_has_feature(MMU_FTR_HPTE_TABLE)) + hash__flush_tlb_page(vma, vmaddr); + else + _tlbie(vmaddr); +} + +static inline void +flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) +{ + flush_range(vma->vm_mm, start, end); +} + +static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end) +{ + flush_range(&init_mm, start, end); +} + +static inline void local_flush_tlb_page(struct vm_area_struct *vma, + unsigned long vmaddr) +{ + flush_tlb_page(vma, vmaddr); +} +static inline void local_flush_tlb_mm(struct mm_struct *mm) +{ + flush_tlb_mm(mm); +} + +#endif /* _ASM_POWERPC_BOOK3S_32_TLBFLUSH_H */ |