diff options
author | Ingo Molnar <mingo@elte.hu> | 2008-10-24 12:48:46 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-10-24 12:48:46 +0200 |
commit | 8c82a17e9c924c0e9f13e75e4c2f6bca19a4b516 (patch) | |
tree | d535f46a917e14e90deccb29ad00aac016ad18dd /include/asm-um/tlb.h | |
parent | 4ce72a2c063a7fa8e42a9435440ae3364115a58d (diff) | |
parent | 57f8f7b60db6f1ed2c6918ab9230c4623a9dbe37 (diff) |
Merge commit 'v2.6.28-rc1' into sched/urgent
Diffstat (limited to 'include/asm-um/tlb.h')
-rw-r--r-- | include/asm-um/tlb.h | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/include/asm-um/tlb.h b/include/asm-um/tlb.h deleted file mode 100644 index 5240fa1c5e0..00000000000 --- a/include/asm-um/tlb.h +++ /dev/null @@ -1,127 +0,0 @@ -#ifndef __UM_TLB_H -#define __UM_TLB_H - -#include <linux/pagemap.h> -#include <linux/swap.h> -#include <asm/percpu.h> -#include <asm/pgalloc.h> -#include <asm/tlbflush.h> - -#define tlb_start_vma(tlb, vma) do { } while (0) -#define tlb_end_vma(tlb, vma) do { } while (0) -#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm) - -/* struct mmu_gather is an opaque type used by the mm code for passing around - * any data needed by arch specific code for tlb_remove_page. - */ -struct mmu_gather { - struct mm_struct *mm; - unsigned int need_flush; /* Really unmapped some ptes? */ - unsigned long start; - unsigned long end; - unsigned int fullmm; /* non-zero means full mm flush */ -}; - -/* Users of the generic TLB shootdown code must declare this storage space. */ -DECLARE_PER_CPU(struct mmu_gather, mmu_gathers); - -static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep, - unsigned long address) -{ - if (tlb->start > address) - tlb->start = address; - if (tlb->end < address + PAGE_SIZE) - tlb->end = address + PAGE_SIZE; -} - -static inline void init_tlb_gather(struct mmu_gather *tlb) -{ - tlb->need_flush = 0; - - tlb->start = TASK_SIZE; - tlb->end = 0; - - if (tlb->fullmm) { - tlb->start = 0; - tlb->end = TASK_SIZE; - } -} - -/* tlb_gather_mmu - * Return a pointer to an initialized struct mmu_gather. - */ -static inline struct mmu_gather * -tlb_gather_mmu(struct mm_struct *mm, unsigned int full_mm_flush) -{ - struct mmu_gather *tlb = &get_cpu_var(mmu_gathers); - - tlb->mm = mm; - tlb->fullmm = full_mm_flush; - - init_tlb_gather(tlb); - - return tlb; -} - -extern void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start, - unsigned long end); - -static inline void -tlb_flush_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end) -{ - if (!tlb->need_flush) - return; - - flush_tlb_mm_range(tlb->mm, tlb->start, tlb->end); - init_tlb_gather(tlb); -} - -/* tlb_finish_mmu - * Called at the end of the shootdown operation to free up any resources - * that were required. - */ -static inline void -tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end) -{ - tlb_flush_mmu(tlb, start, end); - - /* keep the page table cache within bounds */ - check_pgt_cache(); - - put_cpu_var(mmu_gathers); -} - -/* tlb_remove_page - * Must perform the equivalent to __free_pte(pte_get_and_clear(ptep)), - * while handling the additional races in SMP caused by other CPUs - * caching valid mappings in their TLBs. - */ -static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page) -{ - tlb->need_flush = 1; - free_page_and_swap_cache(page); - return; -} - -/** - * tlb_remove_tlb_entry - remember a pte unmapping for later tlb invalidation. - * - * Record the fact that pte's were really umapped in ->need_flush, so we can - * later optimise away the tlb invalidate. This helps when userspace is - * unmapping already-unmapped pages, which happens quite a lot. - */ -#define tlb_remove_tlb_entry(tlb, ptep, address) \ - do { \ - tlb->need_flush = 1; \ - __tlb_remove_tlb_entry(tlb, ptep, address); \ - } while (0) - -#define pte_free_tlb(tlb, ptep) __pte_free_tlb(tlb, ptep) - -#define pud_free_tlb(tlb, pudp) __pud_free_tlb(tlb, pudp) - -#define pmd_free_tlb(tlb, pmdp) __pmd_free_tlb(tlb, pmdp) - -#define tlb_migrate_finish(mm) do {} while (0) - -#endif |