arch/arc/include/asm/tlb.h

   1 /*
   2  * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #ifndef _ASM_ARC_TLB_H
  10 #define _ASM_ARC_TLB_H
  11
  12 #ifdef __KERNEL__
  13
  14 #include <asm/pgtable.h>
  15
  16 /* Masks for actual TLB "PD"s */
  17 #define PTE_BITS_IN_PD0 (_PAGE_GLOBAL | _PAGE_PRESENT)
  18 #define PTE_BITS_IN_PD1 (PAGE_MASK | _PAGE_CACHEABLE | \
  19                          _PAGE_EXECUTE | _PAGE_WRITE | _PAGE_READ | \
  20                          _PAGE_K_EXECUTE | _PAGE_K_WRITE | _PAGE_K_READ)
  21
  22 #ifndef __ASSEMBLY__
  23
  24 #define tlb_flush(tlb)                          \
  25 do {                                            \
  26         if (tlb->fullmm)                        \
  27                 flush_tlb_mm((tlb)->mm);        \
  28 } while (0)
  29
  30 /*
  31  * This pair is called at time of munmap/exit to flush cache and TLB entries
  32  * for mappings being torn down.
  33  * 1) cache-flush part -implemented via tlb_start_vma( ) for VIPT aliasing D$
  34  * 2) tlb-flush part - implemted via tlb_end_vma( ) flushes the TLB range
  35  *
  36  * Note, read http://lkml.org/lkml/2004/1/15/6
  37  */
  38 #ifndef CONFIG_ARC_CACHE_VIPT_ALIASING
  39 #define tlb_start_vma(tlb, vma)
  40 #else
  41 #define tlb_start_vma(tlb, vma)                                         \
  42 do {                                                                    \
  43         if (!tlb->fullmm)                                               \
  44                 flush_cache_range(vma, vma->vm_start, vma->vm_end);     \
  45 } while(0)
  46 #endif
  47
  48 #define tlb_end_vma(tlb, vma)                                           \
  49 do {                                                                    \
  50         if (!tlb->fullmm)                                               \
  51                 flush_tlb_range(vma, vma->vm_start, vma->vm_end);       \
  52 } while (0)
  53
  54 #define __tlb_remove_tlb_entry(tlb, ptep, address)
  55
  56 #include <linux/pagemap.h>
  57 #include <asm-generic/tlb.h>
  58
  59 #ifdef CONFIG_ARC_DBG_TLB_PARANOIA
  60 void tlb_paranoid_check(unsigned int pid_sw, unsigned long address);
  61 #else
  62 #define tlb_paranoid_check(a, b)
  63 #endif
  64
  65 void arc_mmu_init(void);
  66 extern char *arc_mmu_mumbojumbo(int cpu_id, char *buf, int len);
  67 void __init read_decode_mmu_bcr(void);
  68
  69 #endif  /* __ASSEMBLY__ */
  70
  71 #endif  /* __KERNEL__ */
  72
  73 #endif /* _ASM_ARC_TLB_H */