include/asm-sh64/tlb.h

   1 /*
   2  * include/asm-sh64/tlb.h
   3  *
   4  * Copyright (C) 2003  Paul Mundt
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  *
  10  */
  11 #ifndef __ASM_SH64_TLB_H
  12 #define __ASM_SH64_TLB_H
  13
  14 /*
  15  * Note! These are mostly unused, we just need the xTLB_LAST_VAR_UNRESTRICTED
  16  * for head.S! Once this limitation is gone, we can clean the rest of this up.
  17  */
  18
  19 /* ITLB defines */
  20 #define ITLB_FIXED      0x00000000      /* First fixed ITLB, see head.S */
  21 #define ITLB_LAST_VAR_UNRESTRICTED      0x000003F0      /* Last ITLB */
  22
  23 /* DTLB defines */
  24 #define DTLB_FIXED      0x00800000      /* First fixed DTLB, see head.S */
  25 #define DTLB_LAST_VAR_UNRESTRICTED      0x008003F0      /* Last DTLB */
  26
  27 #ifndef __ASSEMBLY__
  28
  29 /**
  30  * for_each_dtlb_entry
  31  *
  32  * @tlb:        TLB entry
  33  *
  34  * Iterate over free (non-wired) DTLB entries
  35  */
  36 #define for_each_dtlb_entry(tlb)                \
  37         for (tlb  = cpu_data->dtlb.first;       \
  38              tlb <= cpu_data->dtlb.last;        \
  39              tlb += cpu_data->dtlb.step)
  40
  41 /**
  42  * for_each_itlb_entry
  43  *
  44  * @tlb:        TLB entry
  45  *
  46  * Iterate over free (non-wired) ITLB entries
  47  */
  48 #define for_each_itlb_entry(tlb)                \
  49         for (tlb  = cpu_data->itlb.first;       \
  50              tlb <= cpu_data->itlb.last;        \
  51              tlb += cpu_data->itlb.step)
  52
  53 /**
  54  * __flush_tlb_slot
  55  *
  56  * @slot:       Address of TLB slot.
  57  *
  58  * Flushes TLB slot @slot.
  59  */
  60 static inline void __flush_tlb_slot(unsigned long long slot)
  61 {
  62         __asm__ __volatile__ ("putcfg %0, 0, r63\n" : : "r" (slot));
  63 }
  64
  65 /* arch/sh64/mm/tlb.c */
  66 extern int sh64_tlb_init(void);
  67 extern unsigned long long sh64_next_free_dtlb_entry(void);
  68 extern unsigned long long sh64_get_wired_dtlb_entry(void);
  69 extern int sh64_put_wired_dtlb_entry(unsigned long long entry);
  70
  71 extern void sh64_setup_tlb_slot(unsigned long long config_addr, unsigned long eaddr, unsigned long asid, unsigned long paddr);
  72 extern void sh64_teardown_tlb_slot(unsigned long long config_addr);
  73
  74 #define tlb_start_vma(tlb, vma) \
  75         flush_cache_range(vma, vma->vm_start, vma->vm_end)
  76
  77 #define tlb_end_vma(tlb, vma)   \
  78         flush_tlb_range(vma, vma->vm_start, vma->vm_end)
  79
  80 #define __tlb_remove_tlb_entry(tlb, pte, address)       do { } while (0)
  81
  82 /*
  83  * Flush whole TLBs for MM
  84  */
  85 #define tlb_flush(tlb)          flush_tlb_mm((tlb)->mm)
  86
  87 #include <asm-generic/tlb.h>
  88
  89 #endif /* __ASSEMBLY__ */
  90
  91 #endif /* __ASM_SH64_TLB_H */
  92