LXR linux-old/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#include <asm-generic/tlb.h>
  30
  31/*
  32 * TLB information structure
  33 *
  34 * Defined for both I and D tlb, per-processor.
  35 */
  36struct tlb_info {
  37        unsigned long long next;
  38        unsigned long long first;
  39        unsigned long long last;
  40
  41        unsigned int entries;
  42        unsigned int step;
  43
  44        unsigned long flags;
  45};
  46
  47/**
  48 * for_each_dtlb_entry
  49 *
  50 * @tlb:        TLB entry
  51 *
  52 * Iterate over free (non-wired) DTLB entries
  53 */
  54#define for_each_dtlb_entry(tlb)                \
  55        for (tlb  = cpu_data->dtlb.first;       \
  56             tlb <= cpu_data->dtlb.last;        \
  57             tlb += cpu_data->dtlb.step)
  58
  59/**
  60 * for_each_itlb_entry
  61 *
  62 * @tlb:        TLB entry
  63 *
  64 * Iterate over free (non-wired) ITLB entries
  65 */
  66#define for_each_itlb_entry(tlb)                \
  67        for (tlb  = cpu_data->itlb.first;       \
  68             tlb <= cpu_data->itlb.last;        \
  69             tlb += cpu_data->itlb.step)
  70
  71/**
  72 * __flush_tlb_slot
  73 *
  74 * @slot:       Address of TLB slot.
  75 *
  76 * Flushes TLB slot @slot.
  77 */
  78static inline void __flush_tlb_slot(unsigned long long slot)
  79{
  80        __asm__ __volatile__ ("putcfg %0, 0, r63\n" : : "r" (slot));
  81}
  82
  83/* arch/sh64/mm/tlb.c */
  84extern int sh64_tlb_init(void);
  85extern unsigned long long sh64_next_free_dtlb_entry(void);
  86extern unsigned long long sh64_get_wired_dtlb_entry(void);
  87extern int sh64_put_wired_dtlb_entry(unsigned long long entry);
  88
  89extern void sh64_setup_tlb_slot(unsigned long long config_addr, unsigned long eaddr, unsigned long asid, unsigned long paddr);
  90extern void sh64_teardown_tlb_slot(unsigned long long config_addr);
  91
  92#endif /* __ASSEMBLY__ */
  93
  94#endif /* __ASM_SH64_TLB_H */
  95
  96