arch/m32r/include/asm/tlbflush.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_M32R_TLBFLUSH_H
   3 #define _ASM_M32R_TLBFLUSH_H
   4
   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  */
  17
  18 extern void local_flush_tlb_all(void);
  19 extern void local_flush_tlb_mm(struct mm_struct *);
  20 extern void local_flush_tlb_page(struct vm_area_struct *, unsigned long);
  21 extern void local_flush_tlb_range(struct vm_area_struct *, unsigned long,
  22         unsigned long);
  23
  24 #ifndef CONFIG_SMP
  25 #ifdef CONFIG_MMU
  26 #define flush_tlb_all()                 local_flush_tlb_all()
  27 #define flush_tlb_mm(mm)                local_flush_tlb_mm(mm)
  28 #define flush_tlb_page(vma, page)       local_flush_tlb_page(vma, page)
  29 #define flush_tlb_range(vma, start, end)        \
  30         local_flush_tlb_range(vma, start, end)
  31 #define flush_tlb_kernel_range(start, end)      local_flush_tlb_all()
  32 #else   /* CONFIG_MMU */
  33 #define flush_tlb_all()                 do { } while (0)
  34 #define flush_tlb_mm(mm)                do { } while (0)
  35 #define flush_tlb_page(vma, vmaddr)     do { } while (0)
  36 #define flush_tlb_range(vma, start, end)        do { } while (0)
  37 #endif  /* CONFIG_MMU */
  38 #else   /* CONFIG_SMP */
  39 extern void smp_flush_tlb_all(void);
  40 extern void smp_flush_tlb_mm(struct mm_struct *);
  41 extern void smp_flush_tlb_page(struct vm_area_struct *, unsigned long);
  42 extern void smp_flush_tlb_range(struct vm_area_struct *, unsigned long,
  43         unsigned long);
  44
  45 #define flush_tlb_all()                 smp_flush_tlb_all()
  46 #define flush_tlb_mm(mm)                smp_flush_tlb_mm(mm)
  47 #define flush_tlb_page(vma, page)       smp_flush_tlb_page(vma, page)
  48 #define flush_tlb_range(vma, start, end)        \
  49         smp_flush_tlb_range(vma, start, end)
  50 #define flush_tlb_kernel_range(start, end)      smp_flush_tlb_all()
  51 #endif  /* CONFIG_SMP */
  52
  53 static __inline__ void __flush_tlb_page(unsigned long page)
  54 {
  55         unsigned int tmpreg0, tmpreg1, tmpreg2;
  56
  57         __asm__ __volatile__ (
  58                 "seth   %0, #high(%4)   \n\t"
  59                 "st     %3, @(%5, %0)   \n\t"
  60                 "ldi    %1, #1          \n\t"
  61                 "st     %1, @(%6, %0)   \n\t"
  62                 "add3   %1, %0, %7      \n\t"
  63                 ".fillinsn              \n"
  64                 "1:                     \n\t"
  65                 "ld     %2, @(%6, %0)   \n\t"
  66                 "bnez   %2, 1b          \n\t"
  67                 "ld     %0, @%1+        \n\t"
  68                 "ld     %1, @%1         \n\t"
  69                 "st     %2, @+%0        \n\t"
  70                 "st     %2, @+%1        \n\t"
  71                 : "=&r" (tmpreg0), "=&r" (tmpreg1), "=&r" (tmpreg2)
  72                 : "r" (page), "i" (MMU_REG_BASE), "i" (MSVA_offset),
  73                 "i" (MTOP_offset), "i" (MIDXI_offset)
  74                 : "memory"
  75         );
  76 }
  77
  78 static __inline__ void __flush_tlb_all(void)
  79 {
  80         unsigned int tmpreg0, tmpreg1;
  81
  82         __asm__ __volatile__ (
  83                 "seth   %0, #high(%2)           \n\t"
  84                 "or3    %0, %0, #low(%2)        \n\t"
  85                 "ldi    %1, #0xc                \n\t"
  86                 "st     %1, @%0                 \n\t"
  87                 ".fillinsn                      \n"
  88                 "1:                             \n\t"
  89                 "ld     %1, @%0                 \n\t"
  90                 "bnez   %1, 1b                  \n\t"
  91                 : "=&r" (tmpreg0), "=&r" (tmpreg1)
  92                 : "i" (MTOP) : "memory"
  93         );
  94 }
  95
  96 extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);
  97
  98 #endif  /* _ASM_M32R_TLBFLUSH_H */