arch/sh/include/asm/tlb_64.h

   1 /* SPDX-License-Identifier: GPL-2.0
   2  *
   3  * include/asm-sh/tlb_64.h
   4  *
   5  * Copyright (C) 2003  Paul Mundt
   6  */
   7 #ifndef __ASM_SH_TLB_64_H
   8 #define __ASM_SH_TLB_64_H
   9
  10 /* ITLB defines */
  11 #define ITLB_FIXED      0x00000000      /* First fixed ITLB, see head.S */
  12 #define ITLB_LAST_VAR_UNRESTRICTED      0x000003F0      /* Last ITLB */
  13
  14 /* DTLB defines */
  15 #define DTLB_FIXED      0x00800000      /* First fixed DTLB, see head.S */
  16 #define DTLB_LAST_VAR_UNRESTRICTED      0x008003F0      /* Last DTLB */
  17
  18 #ifndef __ASSEMBLY__
  19
  20 /**
  21  * for_each_dtlb_entry - Iterate over free (non-wired) DTLB entries
  22  *
  23  * @tlb:        TLB entry
  24  */
  25 #define for_each_dtlb_entry(tlb)                \
  26         for (tlb  = cpu_data->dtlb.first;       \
  27              tlb <= cpu_data->dtlb.last;        \
  28              tlb += cpu_data->dtlb.step)
  29
  30 /**
  31  * for_each_itlb_entry - Iterate over free (non-wired) ITLB entries
  32  *
  33  * @tlb:        TLB entry
  34  */
  35 #define for_each_itlb_entry(tlb)                \
  36         for (tlb  = cpu_data->itlb.first;       \
  37              tlb <= cpu_data->itlb.last;        \
  38              tlb += cpu_data->itlb.step)
  39
  40 /**
  41  * __flush_tlb_slot - Flushes TLB slot @slot.
  42  *
  43  * @slot:       Address of TLB slot.
  44  */
  45 static inline void __flush_tlb_slot(unsigned long long slot)
  46 {
  47         __asm__ __volatile__ ("putcfg %0, 0, r63\n" : : "r" (slot));
  48 }
  49
  50 #ifdef CONFIG_MMU
  51 /* arch/sh64/mm/tlb.c */
  52 int sh64_tlb_init(void);
  53 unsigned long long sh64_next_free_dtlb_entry(void);
  54 unsigned long long sh64_get_wired_dtlb_entry(void);
  55 int sh64_put_wired_dtlb_entry(unsigned long long entry);
  56 void sh64_setup_tlb_slot(unsigned long long config_addr, unsigned long eaddr,
  57                          unsigned long asid, unsigned long paddr);
  58 void sh64_teardown_tlb_slot(unsigned long long config_addr);
  59 #else
  60 #define sh64_tlb_init()                                 do { } while (0)
  61 #define sh64_next_free_dtlb_entry()                     (0)
  62 #define sh64_get_wired_dtlb_entry()                     (0)
  63 #define sh64_put_wired_dtlb_entry(entry)                do { } while (0)
  64 #define sh64_setup_tlb_slot(conf, virt, asid, phys)     do { } while (0)
  65 #define sh64_teardown_tlb_slot(addr)                    do { } while (0)
  66 #endif /* CONFIG_MMU */
  67 #endif /* __ASSEMBLY__ */
  68 #endif /* __ASM_SH_TLB_64_H */