arch/ia64/include/asm/tlbflush.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_IA64_TLBFLUSH_H
   3 #define _ASM_IA64_TLBFLUSH_H
   4
   5 /*
   6  * Copyright (C) 2002 Hewlett-Packard Co
   7  *      David Mosberger-Tang <davidm@hpl.hp.com>
   8  */
   9
  10
  11 #include <linux/mm.h>
  12
  13 #include <asm/intrinsics.h>
  14 #include <asm/mmu_context.h>
  15 #include <asm/page.h>
  16
  17 struct ia64_tr_entry {
  18         u64 ifa;
  19         u64 itir;
  20         u64 pte;
  21         u64 rr;
  22 }; /*Record for tr entry!*/
  23
  24 extern int ia64_itr_entry(u64 target_mask, u64 va, u64 pte, u64 log_size);
  25 extern void ia64_ptr_entry(u64 target_mask, int slot);
  26 extern struct ia64_tr_entry *ia64_idtrs[NR_CPUS];
  27
  28 /*
  29  region register macros
  30 */
  31 #define RR_TO_VE(val)   (((val) >> 0) & 0x0000000000000001)
  32 #define RR_VE(val)     (((val) & 0x0000000000000001) << 0)
  33 #define RR_VE_MASK     0x0000000000000001L
  34 #define RR_VE_SHIFT    0
  35 #define RR_TO_PS(val)  (((val) >> 2) & 0x000000000000003f)
  36 #define RR_PS(val)     (((val) & 0x000000000000003f) << 2)
  37 #define RR_PS_MASK     0x00000000000000fcL
  38 #define RR_PS_SHIFT    2
  39 #define RR_RID_MASK    0x00000000ffffff00L
  40 #define RR_TO_RID(val)         ((val >> 8) & 0xffffff)
  41
  42 /*
  43  * Now for some TLB flushing routines.  This is the kind of stuff that
  44  * can be very expensive, so try to avoid them whenever possible.
  45  */
  46 extern void setup_ptcg_sem(int max_purges, int from_palo);
  47
  48 /*
  49  * Flush everything (kernel mapping may also have changed due to
  50  * vmalloc/vfree).
  51  */
  52 extern void local_flush_tlb_all (void);
  53
  54 #ifdef CONFIG_SMP
  55   extern void smp_flush_tlb_all (void);
  56   extern void smp_flush_tlb_mm (struct mm_struct *mm);
  57   extern void smp_flush_tlb_cpumask (cpumask_t xcpumask);
  58 # define flush_tlb_all()        smp_flush_tlb_all()
  59 #else
  60 # define flush_tlb_all()        local_flush_tlb_all()
  61 # define smp_flush_tlb_cpumask(m) local_flush_tlb_all()
  62 #endif
  63
  64 static inline void
  65 local_finish_flush_tlb_mm (struct mm_struct *mm)
  66 {
  67         if (mm == current->active_mm)
  68                 activate_context(mm);
  69 }
  70
  71 /*
  72  * Flush a specified user mapping.  This is called, e.g., as a result of fork() and
  73  * exit().  fork() ends up here because the copy-on-write mechanism needs to write-protect
  74  * the PTEs of the parent task.
  75  */
  76 static inline void
  77 flush_tlb_mm (struct mm_struct *mm)
  78 {
  79         if (!mm)
  80                 return;
  81
  82         set_bit(mm->context, ia64_ctx.flushmap);
  83         mm->context = 0;
  84
  85         if (atomic_read(&mm->mm_users) == 0)
  86                 return;         /* happens as a result of exit_mmap() */
  87
  88 #ifdef CONFIG_SMP
  89         smp_flush_tlb_mm(mm);
  90 #else
  91         local_finish_flush_tlb_mm(mm);
  92 #endif
  93 }
  94
  95 extern void flush_tlb_range (struct vm_area_struct *vma, unsigned long start, unsigned long end);
  96
  97 /*
  98  * Page-granular tlb flush.
  99  */
 100 static inline void
 101 flush_tlb_page (struct vm_area_struct *vma, unsigned long addr)
 102 {
 103 #ifdef CONFIG_SMP
 104         flush_tlb_range(vma, (addr & PAGE_MASK), (addr & PAGE_MASK) + PAGE_SIZE);
 105 #else
 106         if (vma->vm_mm == current->active_mm)
 107                 ia64_ptcl(addr, (PAGE_SHIFT << 2));
 108         else
 109                 vma->vm_mm->context = 0;
 110 #endif
 111 }
 112
 113 /*
 114  * Flush the local TLB. Invoked from another cpu using an IPI.
 115  */
 116 #ifdef CONFIG_SMP
 117 void smp_local_flush_tlb(void);
 118 #else
 119 #define smp_local_flush_tlb()
 120 #endif
 121
 122 static inline void flush_tlb_kernel_range(unsigned long start,
 123                                           unsigned long end)
 124 {
 125         flush_tlb_all();        /* XXX fix me */
 126 }
 127
 128 #endif /* _ASM_IA64_TLBFLUSH_H */