arch/metag/include/asm/tlbflush.h

   1 #ifndef __ASM_METAG_TLBFLUSH_H
   2 #define __ASM_METAG_TLBFLUSH_H
   3
   4 #include <linux/io.h>
   5 #include <linux/sched.h>
   6 #include <asm/metag_mem.h>
   7 #include <asm/pgalloc.h>
   8
   9 /*
  10  * TLB flushing:
  11  *
  12  *  - flush_tlb() flushes the current mm struct TLBs
  13  *  - flush_tlb_all() flushes all processes TLBs
  14  *  - flush_tlb_mm(mm) flushes the specified mm context TLB's
  15  *  - flush_tlb_page(vma, vmaddr) flushes one page
  16  *  - flush_tlb_range(mm, start, end) flushes a range of pages
  17  *  - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
  18  *  - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
  19  *
  20  * FIXME: Meta 2 can flush single TLB entries.
  21  *
  22  */
  23
  24 #if defined(CONFIG_METAG_META21) && !defined(CONFIG_SMP)
  25 static inline void __flush_tlb(void)
  26 {
  27         /* flush TLB entries for just the current hardware thread */
  28         int thread = hard_processor_id();
  29         metag_out32(0, (LINSYSCFLUSH_TxMMCU_BASE +
  30                         LINSYSCFLUSH_TxMMCU_STRIDE * thread));
  31 }
  32 #else
  33 static inline void __flush_tlb(void)
  34 {
  35         /* flush TLB entries for all hardware threads */
  36         metag_out32(0, LINSYSCFLUSH_MMCU);
  37 }
  38 #endif /* defined(CONFIG_METAG_META21) && !defined(CONFIG_SMP) */
  39
  40 #define flush_tlb() __flush_tlb()
  41
  42 #define flush_tlb_all() __flush_tlb()
  43
  44 #define local_flush_tlb_all() __flush_tlb()
  45
  46 static inline void flush_tlb_mm(struct mm_struct *mm)
  47 {
  48         if (mm == current->active_mm)
  49                 __flush_tlb();
  50 }
  51
  52 static inline void flush_tlb_page(struct vm_area_struct *vma,
  53                                   unsigned long addr)
  54 {
  55         flush_tlb_mm(vma->vm_mm);
  56 }
  57
  58 static inline void flush_tlb_range(struct vm_area_struct *vma,
  59                                    unsigned long start, unsigned long end)
  60 {
  61         flush_tlb_mm(vma->vm_mm);
  62 }
  63
  64 static inline void flush_tlb_pgtables(struct mm_struct *mm,
  65                                       unsigned long start, unsigned long end)
  66 {
  67         flush_tlb_mm(mm);
  68 }
  69
  70 static inline void flush_tlb_kernel_range(unsigned long start,
  71                                           unsigned long end)
  72 {
  73         flush_tlb_all();
  74 }
  75
  76 #endif /* __ASM_METAG_TLBFLUSH_H */
  77