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1da177e4 LT |
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 |