LXR linux/arch/m32r/include/asm/tlbflush.h

   1#ifndef _ASM_M32R_TLBFLUSH_H
   2#define _ASM_M32R_TLBFLUSH_H
   3
   4#include <asm/m32r.h>
   5
   6/*
   7 * TLB flushing:
   8 *
   9 *  - flush_tlb() flushes the current mm struct TLBs
  10 *  - flush_tlb_all() flushes all processes TLBs
  11 *  - flush_tlb_mm(mm) flushes the specified mm context TLB's
  12 *  - flush_tlb_page(vma, vmaddr) flushes one page
  13 *  - flush_tlb_range(vma, start, end) flushes a range of pages
  14 *  - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
  15 */
  16
  17extern void local_flush_tlb_all(void);
  18extern void local_flush_tlb_mm(struct mm_struct *);
  19extern void local_flush_tlb_page(struct vm_area_struct *, unsigned long);
  20extern void local_flush_tlb_range(struct vm_area_struct *, unsigned long,
  21        unsigned long);
  22
  23#ifndef CONFIG_SMP
  24#ifdef CONFIG_MMU
  25#define flush_tlb_all()                 local_flush_tlb_all()
  26#define flush_tlb_mm(mm)                local_flush_tlb_mm(mm)
  27#define flush_tlb_page(vma, page)       local_flush_tlb_page(vma, page)
  28#define flush_tlb_range(vma, start, end)        \
  29        local_flush_tlb_range(vma, start, end)
  30#define flush_tlb_kernel_range(start, end)      local_flush_tlb_all()
  31#else   /* CONFIG_MMU */
  32#define flush_tlb_all()                 do { } while (0)
  33#define flush_tlb_mm(mm)                do { } while (0)
  34#define flush_tlb_page(vma, vmaddr)     do { } while (0)
  35#define flush_tlb_range(vma, start, end)        do { } while (0)
  36#endif  /* CONFIG_MMU */
  37#else   /* CONFIG_SMP */
  38extern void smp_flush_tlb_all(void);
  39extern void smp_flush_tlb_mm(struct mm_struct *);
  40extern void smp_flush_tlb_page(struct vm_area_struct *, unsigned long);
  41extern void smp_flush_tlb_range(struct vm_area_struct *, unsigned long,
  42        unsigned long);
  43
  44#define flush_tlb_all()                 smp_flush_tlb_all()
  45#define flush_tlb_mm(mm)                smp_flush_tlb_mm(mm)
  46#define flush_tlb_page(vma, page)       smp_flush_tlb_page(vma, page)
  47#define flush_tlb_range(vma, start, end)        \
  48        smp_flush_tlb_range(vma, start, end)
  49#define flush_tlb_kernel_range(start, end)      smp_flush_tlb_all()
  50#endif  /* CONFIG_SMP */
  51
  52static __inline__ void __flush_tlb_page(unsigned long page)
  53{
  54        unsigned int tmpreg0, tmpreg1, tmpreg2;
  55
  56        __asm__ __volatile__ (
  57                "seth   %0, #high(%4)   \n\t"
  58                "st     %3, @(%5, %0)   \n\t"
  59                "ldi    %1, #1          \n\t"
  60                "st     %1, @(%6, %0)   \n\t"
  61                "add3   %1, %0, %7      \n\t"
  62                ".fillinsn              \n"
  63                "1:                     \n\t"
  64                "ld     %2, @(%6, %0)   \n\t"
  65                "bnez   %2, 1b          \n\t"
  66                "ld     %0, @%1+        \n\t"
  67                "ld     %1, @%1         \n\t"
  68                "st     %2, @+%0        \n\t"
  69                "st     %2, @+%1        \n\t"
  70                : "=&r" (tmpreg0), "=&r" (tmpreg1), "=&r" (tmpreg2)
  71                : "r" (page), "i" (MMU_REG_BASE), "i" (MSVA_offset),
  72                "i" (MTOP_offset), "i" (MIDXI_offset)
  73                : "memory"
  74        );
  75}
  76
  77static __inline__ void __flush_tlb_all(void)
  78{
  79        unsigned int tmpreg0, tmpreg1;
  80
  81        __asm__ __volatile__ (
  82                "seth   %0, #high(%2)           \n\t"
  83                "or3    %0, %0, #low(%2)        \n\t"
  84                "ldi    %1, #0xc                \n\t"
  85                "st     %1, @%0                 \n\t"
  86                ".fillinsn                      \n"
  87                "1:                             \n\t"
  88                "ld     %1, @%0                 \n\t"
  89                "bnez   %1, 1b                  \n\t"
  90                : "=&r" (tmpreg0), "=&r" (tmpreg1)
  91                : "i" (MTOP) : "memory"
  92        );
  93}
  94
  95extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);
  96
  97#endif  /* _ASM_M32R_TLBFLUSH_H */
  98