#ifndef __ASMARM_TLB_H #define __ASMARM_TLB_H #include <asm/pgalloc.h> #include <asm/tlbflush.h> /* * TLB handling. This allows us to remove pages from the page * tables, and efficiently handle the TLB issues. */ struct mmu_gather { struct mm_struct *mm; unsigned int freed; unsigned int fullmm; unsigned int flushes; unsigned int avoided_flushes; }; extern struct mmu_gather mmu_gathers[NR_CPUS]; static inline struct mmu_gather * tlb_gather_mmu(struct mm_struct *mm, unsigned int full_mm_flush) { int cpu = smp_processor_id(); struct mmu_gather *tlb = &mmu_gathers[cpu]; tlb->mm = mm; tlb->freed = 0; tlb->fullmm = full_mm_flush; return tlb; } static inline void tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end) { struct mm_struct *mm = tlb->mm; unsigned long freed = tlb->freed; int rss = get_mm_counter(mm, rss); if (rss < freed) freed = rss; add_mm_counter(mm, rss, -freed); if (freed) { flush_tlb_mm(mm); tlb->flushes++; } else { tlb->avoided_flushes++; } /* keep the page table cache within bounds */ check_pgt_cache(); } static inline unsigned int tlb_is_full_mm(struct mmu_gather *tlb) { return tlb->fullmm; } #define tlb_remove_tlb_entry(tlb,ptep,address) do { } while (0) //#define tlb_start_vma(tlb,vma) do { } while (0) //FIXME - ARM32 uses this now that things changed in the kernel. seems like it may be pointless on arm26, however to get things compiling... #define tlb_start_vma(tlb,vma) \ do { \ if (!tlb->fullmm) \ flush_cache_range(vma, vma->vm_start, vma->vm_end); \ } while (0) #define tlb_end_vma(tlb,vma) do { } while (0) #define tlb_remove_page(tlb,page) free_page_and_swap_cache(page) #define pte_free_tlb(tlb,ptep) pte_free(ptep) #define pmd_free_tlb(tlb,pmdp) pmd_free(pmdp) #endif