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11#ifndef _XTENSA_TLBFLUSH_H
12#define _XTENSA_TLBFLUSH_H
13
14#ifdef __KERNEL__
15
16#include <linux/stringify.h>
17#include <asm/processor.h>
18
19#define DTLB_WAY_PGD 7
20
21#define ITLB_ARF_WAYS 4
22#define DTLB_ARF_WAYS 4
23
24#define ITLB_HIT_BIT 3
25#define DTLB_HIT_BIT 4
26
27#ifndef __ASSEMBLY__
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37extern void flush_tlb_all(void);
38extern void flush_tlb_mm(struct mm_struct*);
39extern void flush_tlb_page(struct vm_area_struct*,unsigned long);
40extern void flush_tlb_range(struct vm_area_struct*,unsigned long,unsigned long);
41
42#define flush_tlb_kernel_range(start,end) flush_tlb_all()
43
44
45
46static inline unsigned long itlb_probe(unsigned long addr)
47{
48 unsigned long tmp;
49 __asm__ __volatile__("pitlb %0, %1\n\t" : "=a" (tmp) : "a" (addr));
50 return tmp;
51}
52
53static inline unsigned long dtlb_probe(unsigned long addr)
54{
55 unsigned long tmp;
56 __asm__ __volatile__("pdtlb %0, %1\n\t" : "=a" (tmp) : "a" (addr));
57 return tmp;
58}
59
60static inline void invalidate_itlb_entry (unsigned long probe)
61{
62 __asm__ __volatile__("iitlb %0; isync\n\t" : : "a" (probe));
63}
64
65static inline void invalidate_dtlb_entry (unsigned long probe)
66{
67 __asm__ __volatile__("idtlb %0; dsync\n\t" : : "a" (probe));
68}
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74
75static inline void invalidate_itlb_entry_no_isync (unsigned entry)
76{
77
78 __asm__ __volatile__ ("iitlb %0\n" : : "a" (entry) );
79}
80
81static inline void invalidate_dtlb_entry_no_isync (unsigned entry)
82{
83
84 __asm__ __volatile__ ("idtlb %0\n" : : "a" (entry) );
85}
86
87static inline void set_itlbcfg_register (unsigned long val)
88{
89 __asm__ __volatile__("wsr %0, itlbcfg\n\t" "isync\n\t"
90 : : "a" (val));
91}
92
93static inline void set_dtlbcfg_register (unsigned long val)
94{
95 __asm__ __volatile__("wsr %0, dtlbcfg; dsync\n\t"
96 : : "a" (val));
97}
98
99static inline void set_ptevaddr_register (unsigned long val)
100{
101 __asm__ __volatile__(" wsr %0, ptevaddr; isync\n"
102 : : "a" (val));
103}
104
105static inline unsigned long read_ptevaddr_register (void)
106{
107 unsigned long tmp;
108 __asm__ __volatile__("rsr %0, ptevaddr\n\t" : "=a" (tmp));
109 return tmp;
110}
111
112static inline void write_dtlb_entry (pte_t entry, int way)
113{
114 __asm__ __volatile__("wdtlb %1, %0; dsync\n\t"
115 : : "r" (way), "r" (entry) );
116}
117
118static inline void write_itlb_entry (pte_t entry, int way)
119{
120 __asm__ __volatile__("witlb %1, %0; isync\n\t"
121 : : "r" (way), "r" (entry) );
122}
123
124static inline void invalidate_page_directory (void)
125{
126 invalidate_dtlb_entry (DTLB_WAY_PGD);
127 invalidate_dtlb_entry (DTLB_WAY_PGD+1);
128 invalidate_dtlb_entry (DTLB_WAY_PGD+2);
129}
130
131static inline void invalidate_itlb_mapping (unsigned address)
132{
133 unsigned long tlb_entry;
134 if (((tlb_entry = itlb_probe(address)) & (1 << ITLB_HIT_BIT)) != 0)
135 invalidate_itlb_entry(tlb_entry);
136}
137
138static inline void invalidate_dtlb_mapping (unsigned address)
139{
140 unsigned long tlb_entry;
141 if (((tlb_entry = dtlb_probe(address)) & (1 << DTLB_HIT_BIT)) != 0)
142 invalidate_dtlb_entry(tlb_entry);
143}
144
145#define check_pgt_cache() do { } while (0)
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161static inline unsigned long read_dtlb_virtual (int way)
162{
163 unsigned long tmp;
164 __asm__ __volatile__("rdtlb0 %0, %1\n\t" : "=a" (tmp), "+a" (way));
165 return tmp;
166}
167
168static inline unsigned long read_dtlb_translation (int way)
169{
170 unsigned long tmp;
171 __asm__ __volatile__("rdtlb1 %0, %1\n\t" : "=a" (tmp), "+a" (way));
172 return tmp;
173}
174
175static inline unsigned long read_itlb_virtual (int way)
176{
177 unsigned long tmp;
178 __asm__ __volatile__("ritlb0 %0, %1\n\t" : "=a" (tmp), "+a" (way));
179 return tmp;
180}
181
182static inline unsigned long read_itlb_translation (int way)
183{
184 unsigned long tmp;
185 __asm__ __volatile__("ritlb1 %0, %1\n\t" : "=a" (tmp), "+a" (way));
186 return tmp;
187}
188
189#endif
190#endif
191#endif
192