include/asm-m32r/tlbflush.h

   1 #ifndef _ASM_M32R_TLBFLUSH_H
   2 #define _ASM_M32R_TLBFLUSH_H
   3
   4 #include <linux/config.h>
   5 #include <asm/m32r.h>
   6
   7 /*
   8  * TLB flushing:
   9  *
  10  *  - flush_tlb() flushes the current mm struct TLBs
  11  *  - flush_tlb_all() flushes all processes TLBs
  12  *  - flush_tlb_mm(mm) flushes the specified mm context TLB's
  13  *  - flush_tlb_page(vma, vmaddr) flushes one page
  14  *  - flush_tlb_range(vma, start, end) flushes a range of pages
  15  *  - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
  16  *  - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
  17  */
  18
  19 extern void local_flush_tlb_all(void);
  20 extern void local_flush_tlb_mm(struct mm_struct *);
  21 extern void local_flush_tlb_page(struct vm_area_struct *, unsigned long);
  22 extern void local_flush_tlb_range(struct vm_area_struct *, unsigned long,
  23         unsigned long);
  24
  25 #ifndef CONFIG_SMP
  26 #ifdef CONFIG_MMU
  27 #define flush_tlb_all()                 local_flush_tlb_all()
  28 #define flush_tlb_mm(mm)                local_flush_tlb_mm(mm)
  29 #define flush_tlb_page(vma, page)       local_flush_tlb_page(vma, page)
  30 #define flush_tlb_range(vma, start, end)        \
  31         local_flush_tlb_range(vma, start, end)
  32 #define flush_tlb_kernel_range(start, end)      local_flush_tlb_all()
  33 #else   /* CONFIG_MMU */
  34 #define flush_tlb_all()                 do { } while (0)
  35 #define flush_tlb_mm(mm)                do { } while (0)
  36 #define flush_tlb_page(vma, vmaddr)     do { } while (0)
  37 #define flush_tlb_range(vma, start, end)        do { } while (0)
  38 #endif  /* CONFIG_MMU */
  39 #else   /* CONFIG_SMP */
  40 extern void smp_flush_tlb_all(void);
  41 extern void smp_flush_tlb_mm(struct mm_struct *);
  42 extern void smp_flush_tlb_page(struct vm_area_struct *, unsigned long);
  43 extern void smp_flush_tlb_range(struct vm_area_struct *, unsigned long,
  44         unsigned long);
  45
  46 #define flush_tlb_all()                 smp_flush_tlb_all()
  47 #define flush_tlb_mm(mm)                smp_flush_tlb_mm(mm)
  48 #define flush_tlb_page(vma, page)       smp_flush_tlb_page(vma, page)
  49 #define flush_tlb_range(vma, start, end)        \
  50         smp_flush_tlb_range(vma, start, end)
  51 #define flush_tlb_kernel_range(start, end)      smp_flush_tlb_all()
  52 #endif  /* CONFIG_SMP */
  53
  54 static __inline__ void __flush_tlb_page(unsigned long page)
  55 {
  56         unsigned int tmpreg0, tmpreg1, tmpreg2;
  57
  58         __asm__ __volatile__ (
  59                 "seth   %0, #high(%4)   \n\t"
  60                 "st     %3, @(%5, %0)   \n\t"
  61                 "ldi    %1, #1          \n\t"
  62                 "st     %1, @(%6, %0)   \n\t"
  63                 "add3   %1, %0, %7      \n\t"
  64                 ".fillinsn              \n"
  65                 "1:                     \n\t"
  66                 "ld     %2, @(%6, %0)   \n\t"
  67                 "bnez   %2, 1b          \n\t"
  68                 "ld     %0, @%1+        \n\t"
  69                 "ld     %1, @%1         \n\t"
  70                 "st     %2, @+%0        \n\t"
  71                 "st     %2, @+%1        \n\t"
  72                 : "=&r" (tmpreg0), "=&r" (tmpreg1), "=&r" (tmpreg2)
  73                 : "r" (page), "i" (MMU_REG_BASE), "i" (MSVA_offset),
  74                 "i" (MTOP_offset), "i" (MIDXI_offset)
  75                 : "memory"
  76         );
  77 }
  78
  79 static __inline__ void __flush_tlb_all(void)
  80 {
  81         unsigned int tmpreg0, tmpreg1;
  82
  83         __asm__ __volatile__ (
  84                 "seth   %0, #high(%2)           \n\t"
  85                 "or3    %0, %0, #low(%2)        \n\t"
  86                 "ldi    %1, #0xc                \n\t"
  87                 "st     %1, @%0                 \n\t"
  88                 ".fillinsn                      \n"
  89                 "1:                             \n\t"
  90                 "ld     %1, @%0                 \n\t"
  91                 "bnez   %1, 1b                  \n\t"
  92                 : "=&r" (tmpreg0), "=&r" (tmpreg1)
  93                 : "i" (MTOP) : "memory"
  94         );
  95 }
  96
  97 #define flush_tlb_pgtables(mm, start, end)      do { } while (0)
  98
  99 extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t);
 100
 101 #endif  /* _ASM_M32R_TLBFLUSH_H */
 102