diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-arm26/tlb.h |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/asm-arm26/tlb.h')
-rw-r--r-- | include/asm-arm26/tlb.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/include/asm-arm26/tlb.h b/include/asm-arm26/tlb.h new file mode 100644 index 00000000000..1316352a58f --- /dev/null +++ b/include/asm-arm26/tlb.h @@ -0,0 +1,78 @@ +#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 |