LXR linux/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)
  25static 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
  33static 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
  46static inline void flush_tlb_mm(struct mm_struct *mm)
  47{
  48        if (mm == current->active_mm)
  49                __flush_tlb();
  50}
  51
  52static inline void flush_tlb_page(struct vm_area_struct *vma,
  53                                  unsigned long addr)
  54{
  55        flush_tlb_mm(vma->vm_mm);
  56}
  57
  58static 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
  64static inline void flush_tlb_pgtables(struct mm_struct *mm,
  65                                      unsigned long start, unsigned long end)
  66{
  67        flush_tlb_mm(mm);
  68}
  69
  70static 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
  78