arch/sh/include/asm/tlb_64.h

   1 /*
   2  * include/asm-sh/tlb_64.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 #ifndef __ASM_SH_TLB_64_H
  11 #define __ASM_SH_TLB_64_H
  12
  13 /* ITLB defines */
  14 #define ITLB_FIXED      0x00000000      /* First fixed ITLB, see head.S */
  15 #define ITLB_LAST_VAR_UNRESTRICTED      0x000003F0      /* Last ITLB */
  16
  17 /* DTLB defines */
  18 #define DTLB_FIXED      0x00800000      /* First fixed DTLB, see head.S */
  19 #define DTLB_LAST_VAR_UNRESTRICTED      0x008003F0      /* Last DTLB */
  20
  21 #ifndef __ASSEMBLY__
  22
  23 /**
  24  * for_each_dtlb_entry
  25  *
  26  * @tlb:        TLB entry
  27  *
  28  * Iterate over free (non-wired) DTLB entries
  29  */
  30 #define for_each_dtlb_entry(tlb)                \
  31         for (tlb  = cpu_data->dtlb.first;       \
  32              tlb <= cpu_data->dtlb.last;        \
  33              tlb += cpu_data->dtlb.step)
  34
  35 /**
  36  * for_each_itlb_entry
  37  *
  38  * @tlb:        TLB entry
  39  *
  40  * Iterate over free (non-wired) ITLB entries
  41  */
  42 #define for_each_itlb_entry(tlb)                \
  43         for (tlb  = cpu_data->itlb.first;       \
  44              tlb <= cpu_data->itlb.last;        \
  45              tlb += cpu_data->itlb.step)
  46
  47 /**
  48  * __flush_tlb_slot
  49  *
  50  * @slot:       Address of TLB slot.
  51  *
  52  * Flushes TLB slot @slot.
  53  */
  54 static inline void __flush_tlb_slot(unsigned long long slot)
  55 {
  56         __asm__ __volatile__ ("putcfg %0, 0, r63\n" : : "r" (slot));
  57 }
  58
  59 #ifdef CONFIG_MMU
  60 /* arch/sh64/mm/tlb.c */
  61 int sh64_tlb_init(void);
  62 unsigned long long sh64_next_free_dtlb_entry(void);
  63 unsigned long long sh64_get_wired_dtlb_entry(void);
  64 int sh64_put_wired_dtlb_entry(unsigned long long entry);
  65 void sh64_setup_tlb_slot(unsigned long long config_addr, unsigned long eaddr,
  66                          unsigned long asid, unsigned long paddr);
  67 void sh64_teardown_tlb_slot(unsigned long long config_addr);
  68 #else
  69 #define sh64_tlb_init()                                 do { } while (0)
  70 #define sh64_next_free_dtlb_entry()                     (0)
  71 #define sh64_get_wired_dtlb_entry()                     (0)
  72 #define sh64_put_wired_dtlb_entry(entry)                do { } while (0)
  73 #define sh64_setup_tlb_slot(conf, virt, asid, phys)     do { } while (0)
  74 #define sh64_teardown_tlb_slot(addr)                    do { } while (0)
  75 #endif /* CONFIG_MMU */
  76 #endif /* __ASSEMBLY__ */
  77 #endif /* __ASM_SH_TLB_64_H */