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-rw-r--r--include/asm-sh64/tlb.h92
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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 */
60static 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 */
66extern int sh64_tlb_init(void);
67extern unsigned long long sh64_next_free_dtlb_entry(void);
68extern unsigned long long sh64_get_wired_dtlb_entry(void);
69extern int sh64_put_wired_dtlb_entry(unsigned long long entry);
70
71extern void sh64_setup_tlb_slot(unsigned long long config_addr, unsigned long eaddr, unsigned long asid, unsigned long paddr);
72extern 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