include/asm-arm26/tlbflush.h

   1 #ifndef __ASMARM_TLBFLUSH_H
   2 #define __ASMARM_TLBFLUSH_H
   3
   4 /*
   5  * TLB flushing:
   6  *
   7  *  - flush_tlb_all() flushes all processes TLBs
   8  *  - flush_tlb_mm(mm) flushes the specified mm context TLB's
   9  *  - flush_tlb_page(vma, vmaddr) flushes one page
  10  *  - flush_tlb_range(vma, start, end) flushes a range of pages
  11  */
  12
  13 #define flush_tlb_all()                         memc_update_all()
  14 #define flush_tlb_mm(mm)                        memc_update_mm(mm)
  15 #define flush_tlb_page(vma, vmaddr)             do { printk("flush_tlb_page\n");} while (0)  // IS THIS RIGHT?
  16 #define flush_tlb_range(vma,start,end)          \
  17                 do { memc_update_mm(vma->vm_mm); (void)(start); (void)(end); } while (0)
  18 #define flush_tlb_pgtables(mm,start,end)        do { printk("flush_tlb_pgtables\n");} while (0)
  19 #define flush_tlb_kernel_range(s,e)             do { printk("flush_tlb_range\n");} while (0)
  20
  21 /*
  22  * The following handle the weird MEMC chip
  23  */
  24 static inline void memc_update_all(void)
  25 {
  26         struct task_struct *p;
  27         cpu_memc_update_all(init_mm.pgd);
  28         for_each_process(p) {
  29                 if (!p->mm)
  30                         continue;
  31                 cpu_memc_update_all(p->mm->pgd);
  32         }
  33         processor._set_pgd(current->active_mm->pgd);
  34 }
  35
  36 static inline void memc_update_mm(struct mm_struct *mm)
  37 {
  38         cpu_memc_update_all(mm->pgd);
  39
  40         if (mm == current->active_mm)
  41                 processor._set_pgd(mm->pgd);
  42 }
  43
  44 static inline void
  45 memc_clear(struct mm_struct *mm, struct page *page)
  46 {
  47         cpu_memc_update_entry(mm->pgd, (unsigned long) page_address(page), 0);
  48
  49         if (mm == current->active_mm)
  50                 processor._set_pgd(mm->pgd);
  51 }
  52
  53 static inline void
  54 memc_update_addr(struct mm_struct *mm, pte_t pte, unsigned long vaddr)
  55 {
  56         cpu_memc_update_entry(mm->pgd, pte_val(pte), vaddr);
  57
  58         if (mm == current->active_mm)
  59                 processor._set_pgd(mm->pgd);
  60 }
  61
  62 static inline void
  63 update_mmu_cache(struct vm_area_struct *vma, unsigned long addr, pte_t pte)
  64 {
  65         struct mm_struct *mm = vma->vm_mm;
  66 printk("update_mmu_cache\n");
  67         memc_update_addr(mm, pte, addr);
  68 }
  69
  70 #endif