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[linux-2.6.git] / 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 /**
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