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linux
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tlb.h
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tlb.h
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/* * TLB shootdown specifics for powerpc * * Copyright (C) 2002 Anton Blanchard, IBM Corp. * Copyright (C) 2002 Paul Mackerras, IBM Corp. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #ifndef _ASM_POWERPC_TLB_H #define _ASM_POWERPC_TLB_H #ifdef __KERNEL__ #ifndef __powerpc64__ #include <asm/pgtable.h> #endif #include <asm/pgalloc.h> #ifndef __powerpc64__ #include <asm/page.h> #include <asm/mmu.h> #endif #include <linux/pagemap.h> #define tlb_start_vma(tlb, vma) do { } while (0) #define tlb_end_vma(tlb, vma) do { } while (0) #define __tlb_remove_tlb_entry __tlb_remove_tlb_entry #define tlb_remove_check_page_size_change tlb_remove_check_page_size_change extern void tlb_flush(struct mmu_gather *tlb); /* Get the generic bits... */ #include <asm-generic/tlb.h> extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep, unsigned long address); static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep, unsigned long address) { #ifdef CONFIG_PPC_STD_MMU_32 if (pte_val(*ptep) & _PAGE_HASHPTE) flush_hash_entry(tlb->mm, ptep, address); #endif } static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb, unsigned int page_size) { if (!tlb->page_size) tlb->page_size = page_size; else if (tlb->page_size != page_size) { tlb_flush_mmu(tlb); /* * update the page size after flush for the new * mmu_gather. */ tlb->page_size = page_size; } } #ifdef CONFIG_SMP static inline int mm_is_core_local(struct mm_struct *mm) { return cpumask_subset(mm_cpumask(mm), topology_sibling_cpumask(smp_processor_id())); } #ifdef CONFIG_PPC_BOOK3S_64 static inline int mm_is_thread_local(struct mm_struct *mm) { if (atomic_read(&mm->context.active_cpus) > 1) return false; return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm)); } static inline void mm_reset_thread_local(struct mm_struct *mm) { WARN_ON(atomic_read(&mm->context.copros) > 0); /* * It's possible for mm_access to take a reference on mm_users to * access the remote mm from another thread, but it's not allowed * to set mm_cpumask, so mm_users may be > 1 here. */ WARN_ON(current->mm != mm); atomic_set(&mm->context.active_cpus, 1); cpumask_clear(mm_cpumask(mm)); cpumask_set_cpu(smp_processor_id(), mm_cpumask(mm)); } #else /* CONFIG_PPC_BOOK3S_64 */ static inline int mm_is_thread_local(struct mm_struct *mm) { return cpumask_equal(mm_cpumask(mm), cpumask_of(smp_processor_id())); } #endif /* !CONFIG_PPC_BOOK3S_64 */ #else /* CONFIG_SMP */ static inline int mm_is_core_local(struct mm_struct *mm) { return 1; } static inline int mm_is_thread_local(struct mm_struct *mm) { return 1; } #endif #endif /* __KERNEL__ */ #endif /* __ASM_POWERPC_TLB_H */
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