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authorPaul Mundt <lethal@linux-sh.org>2007-11-09 02:37:18 -0500
committerPaul Mundt <lethal@linux-sh.org>2008-01-27 23:18:41 -0500
commitcdcc970829e81da3445346cb71b2ea264c9952b9 (patch)
tree0a82de87d6b2d8b86d8b5badd58daec44b026d68
parent9085fa1255fc16bf0dbd217e9f4cdccf16f064d3 (diff)
sh: Move in the SH-5 mmu_context headers.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat
-rw-r--r--include/asm-sh/cpu-sh5/mmu_context.h27
-rw-r--r--include/asm-sh/mmu_context.h87
-rw-r--r--include/asm-sh/mmu_context_32.h47
-rw-r--r--include/asm-sh/mmu_context_64.h75
-rw-r--r--include/asm-sh64/mmu_context.h208
5 files changed, 173 insertions, 271 deletions
diff --git a/include/asm-sh/cpu-sh5/mmu_context.h b/include/asm-sh/cpu-sh5/mmu_context.h
new file mode 100644
index 000000000000..df857fc09960
--- /dev/null
+++ b/include/asm-sh/cpu-sh5/mmu_context.h
@@ -0,0 +1,27 @@
1#ifndef __ASM_SH_CPU_SH5_MMU_CONTEXT_H
2#define __ASM_SH_CPU_SH5_MMU_CONTEXT_H
3
4/* Common defines */
5#define TLB_STEP 0x00000010
6#define TLB_PTEH 0x00000000
7#define TLB_PTEL 0x00000008
8
9/* PTEH defines */
10#define PTEH_ASID_SHIFT 2
11#define PTEH_VALID 0x0000000000000001
12#define PTEH_SHARED 0x0000000000000002
13#define PTEH_MATCH_ASID 0x00000000000003ff
14
15#ifndef __ASSEMBLY__
16/* This has to be a common function because the next location to fill
17 * information is shared. */
18extern void __do_tlb_refill(unsigned long address, unsigned long long is_text_not_data, pte_t *pte);
19
20/* Profiling counter. */
21#ifdef CONFIG_SH64_PROC_TLB
22extern unsigned long long calls_to_do_fast_page_fault;
23#endif
24
25#endif /* __ASSEMBLY__ */
26
27#endif /* __ASM_SH_CPU_SH5_MMU_CONTEXT_H */
diff --git a/include/asm-sh/mmu_context.h b/include/asm-sh/mmu_context.h
index 199662bb35c6..fe58d00b250c 100644
--- a/include/asm-sh/mmu_context.h
+++ b/include/asm-sh/mmu_context.h
@@ -1,13 +1,13 @@
1/* 1/*
2 * Copyright (C) 1999 Niibe Yutaka 2 * Copyright (C) 1999 Niibe Yutaka
3 * Copyright (C) 2003 - 2006 Paul Mundt 3 * Copyright (C) 2003 - 2007 Paul Mundt
4 * 4 *
5 * ASID handling idea taken from MIPS implementation. 5 * ASID handling idea taken from MIPS implementation.
6 */ 6 */
7#ifndef __ASM_SH_MMU_CONTEXT_H 7#ifndef __ASM_SH_MMU_CONTEXT_H
8#define __ASM_SH_MMU_CONTEXT_H 8#define __ASM_SH_MMU_CONTEXT_H
9#ifdef __KERNEL__
10 9
10#ifdef __KERNEL__
11#include <asm/cpu/mmu_context.h> 11#include <asm/cpu/mmu_context.h>
12#include <asm/tlbflush.h> 12#include <asm/tlbflush.h>
13#include <asm/uaccess.h> 13#include <asm/uaccess.h>
@@ -19,7 +19,6 @@
19 * (a) TLB cache version (or round, cycle whatever expression you like) 19 * (a) TLB cache version (or round, cycle whatever expression you like)
20 * (b) ASID (Address Space IDentifier) 20 * (b) ASID (Address Space IDentifier)
21 */ 21 */
22
23#define MMU_CONTEXT_ASID_MASK 0x000000ff 22#define MMU_CONTEXT_ASID_MASK 0x000000ff
24#define MMU_CONTEXT_VERSION_MASK 0xffffff00 23#define MMU_CONTEXT_VERSION_MASK 0xffffff00
25#define MMU_CONTEXT_FIRST_VERSION 0x00000100 24#define MMU_CONTEXT_FIRST_VERSION 0x00000100
@@ -28,10 +27,11 @@
28/* ASID is 8-bit value, so it can't be 0x100 */ 27/* ASID is 8-bit value, so it can't be 0x100 */
29#define MMU_NO_ASID 0x100 28#define MMU_NO_ASID 0x100
30 29
31#define cpu_context(cpu, mm) ((mm)->context.id[cpu])
32#define cpu_asid(cpu, mm) (cpu_context((cpu), (mm)) & \
33 MMU_CONTEXT_ASID_MASK)
34#define asid_cache(cpu) (cpu_data[cpu].asid_cache) 30#define asid_cache(cpu) (cpu_data[cpu].asid_cache)
31#define cpu_context(cpu, mm) ((mm)->context.id[cpu])
32
33#define cpu_asid(cpu, mm) \
34 (cpu_context((cpu), (mm)) & MMU_CONTEXT_ASID_MASK)
35 35
36/* 36/*
37 * Virtual Page Number mask 37 * Virtual Page Number mask
@@ -39,6 +39,12 @@
39#define MMU_VPN_MASK 0xfffff000 39#define MMU_VPN_MASK 0xfffff000
40 40
41#ifdef CONFIG_MMU 41#ifdef CONFIG_MMU
42#if defined(CONFIG_SUPERH32)
43#include "mmu_context_32.h"
44#else
45#include "mmu_context_64.h"
46#endif
47
42/* 48/*
43 * Get MMU context if needed. 49 * Get MMU context if needed.
44 */ 50 */
@@ -59,6 +65,14 @@ static inline void get_mmu_context(struct mm_struct *mm, unsigned int cpu)
59 */ 65 */
60 flush_tlb_all(); 66 flush_tlb_all();
61 67
68#ifdef CONFIG_SUPERH64
69 /*
70 * The SH-5 cache uses the ASIDs, requiring both the I and D
71 * cache to be flushed when the ASID is exhausted. Weak.
72 */
73 flush_cache_all();
74#endif
75
62 /* 76 /*
63 * Fix version; Note that we avoid version #0 77 * Fix version; Note that we avoid version #0
64 * to distingush NO_CONTEXT. 78 * to distingush NO_CONTEXT.
@@ -86,39 +100,6 @@ static inline int init_new_context(struct task_struct *tsk,
86} 100}
87 101
88/* 102/*
89 * Destroy context related info for an mm_struct that is about
90 * to be put to rest.
91 */
92static inline void destroy_context(struct mm_struct *mm)
93{
94 /* Do nothing */
95}
96
97static inline void set_asid(unsigned long asid)
98{
99 unsigned long __dummy;
100
101 __asm__ __volatile__ ("mov.l %2, %0\n\t"
102 "and %3, %0\n\t"
103 "or %1, %0\n\t"
104 "mov.l %0, %2"
105 : "=&r" (__dummy)
106 : "r" (asid), "m" (__m(MMU_PTEH)),
107 "r" (0xffffff00));
108}
109
110static inline unsigned long get_asid(void)
111{
112 unsigned long asid;
113
114 __asm__ __volatile__ ("mov.l %1, %0"
115 : "=r" (asid)
116 : "m" (__m(MMU_PTEH)));
117 asid &= MMU_CONTEXT_ASID_MASK;
118 return asid;
119}
120
121/*
122 * After we have set current->mm to a new value, this activates 103 * After we have set current->mm to a new value, this activates
123 * the context for the new mm so we see the new mappings. 104 * the context for the new mm so we see the new mappings.
124 */ 105 */
@@ -128,17 +109,6 @@ static inline void activate_context(struct mm_struct *mm, unsigned int cpu)
128 set_asid(cpu_asid(cpu, mm)); 109 set_asid(cpu_asid(cpu, mm));
129} 110}
130 111
131/* MMU_TTB is used for optimizing the fault handling. */
132static inline void set_TTB(pgd_t *pgd)
133{
134 ctrl_outl((unsigned long)pgd, MMU_TTB);
135}
136
137static inline pgd_t *get_TTB(void)
138{
139 return (pgd_t *)ctrl_inl(MMU_TTB);
140}
141
142static inline void switch_mm(struct mm_struct *prev, 112static inline void switch_mm(struct mm_struct *prev,
143 struct mm_struct *next, 113 struct mm_struct *next,
144 struct task_struct *tsk) 114 struct task_struct *tsk)
@@ -153,17 +123,7 @@ static inline void switch_mm(struct mm_struct *prev,
153 if (!cpu_test_and_set(cpu, next->cpu_vm_mask)) 123 if (!cpu_test_and_set(cpu, next->cpu_vm_mask))
154 activate_context(next, cpu); 124 activate_context(next, cpu);
155} 125}
156 126#else
157#define deactivate_mm(tsk,mm) do { } while (0)
158
159#define activate_mm(prev, next) \
160 switch_mm((prev),(next),NULL)
161
162static inline void
163enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
164{
165}
166#else /* !CONFIG_MMU */
167#define get_mmu_context(mm) do { } while (0) 127#define get_mmu_context(mm) do { } while (0)
168#define init_new_context(tsk,mm) (0) 128#define init_new_context(tsk,mm) (0)
169#define destroy_context(mm) do { } while (0) 129#define destroy_context(mm) do { } while (0)
@@ -173,10 +133,11 @@ enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
173#define get_TTB() (0) 133#define get_TTB() (0)
174#define activate_context(mm,cpu) do { } while (0) 134#define activate_context(mm,cpu) do { } while (0)
175#define switch_mm(prev,next,tsk) do { } while (0) 135#define switch_mm(prev,next,tsk) do { } while (0)
136#endif /* CONFIG_MMU */
137
138#define activate_mm(prev, next) switch_mm((prev),(next),NULL)
176#define deactivate_mm(tsk,mm) do { } while (0) 139#define deactivate_mm(tsk,mm) do { } while (0)
177#define activate_mm(prev,next) do { } while (0)
178#define enter_lazy_tlb(mm,tsk) do { } while (0) 140#define enter_lazy_tlb(mm,tsk) do { } while (0)
179#endif /* CONFIG_MMU */
180 141
181#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4) 142#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4)
182/* 143/*
diff --git a/include/asm-sh/mmu_context_32.h b/include/asm-sh/mmu_context_32.h
new file mode 100644
index 000000000000..f4f9aebd68b7
--- /dev/null
+++ b/include/asm-sh/mmu_context_32.h
@@ -0,0 +1,47 @@
1#ifndef __ASM_SH_MMU_CONTEXT_32_H
2#define __ASM_SH_MMU_CONTEXT_32_H
3
4/*
5 * Destroy context related info for an mm_struct that is about
6 * to be put to rest.
7 */
8static inline void destroy_context(struct mm_struct *mm)
9{
10 /* Do nothing */
11}
12
13static inline void set_asid(unsigned long asid)
14{
15 unsigned long __dummy;
16
17 __asm__ __volatile__ ("mov.l %2, %0\n\t"
18 "and %3, %0\n\t"
19 "or %1, %0\n\t"
20 "mov.l %0, %2"
21 : "=&r" (__dummy)
22 : "r" (asid), "m" (__m(MMU_PTEH)),
23 "r" (0xffffff00));
24}
25
26static inline unsigned long get_asid(void)
27{
28 unsigned long asid;
29
30 __asm__ __volatile__ ("mov.l %1, %0"
31 : "=r" (asid)
32 : "m" (__m(MMU_PTEH)));
33 asid &= MMU_CONTEXT_ASID_MASK;
34 return asid;
35}
36
37/* MMU_TTB is used for optimizing the fault handling. */
38static inline void set_TTB(pgd_t *pgd)
39{
40 ctrl_outl((unsigned long)pgd, MMU_TTB);
41}
42
43static inline pgd_t *get_TTB(void)
44{
45 return (pgd_t *)ctrl_inl(MMU_TTB);
46}
47#endif /* __ASM_SH_MMU_CONTEXT_32_H */
diff --git a/include/asm-sh/mmu_context_64.h b/include/asm-sh/mmu_context_64.h
new file mode 100644
index 000000000000..020be744b088
--- /dev/null
+++ b/include/asm-sh/mmu_context_64.h
@@ -0,0 +1,75 @@
1#ifndef __ASM_SH_MMU_CONTEXT_64_H
2#define __ASM_SH_MMU_CONTEXT_64_H
3
4/*
5 * sh64-specific mmu_context interface.
6 *
7 * Copyright (C) 2000, 2001 Paolo Alberelli
8 * Copyright (C) 2003 - 2007 Paul Mundt
9 *
10 * This file is subject to the terms and conditions of the GNU General Public
11 * License. See the file "COPYING" in the main directory of this archive
12 * for more details.
13 */
14#include <asm/cpu/registers.h>
15#include <asm/cacheflush.h>
16
17#define SR_ASID_MASK 0xffffffffff00ffffULL
18#define SR_ASID_SHIFT 16
19
20/*
21 * Destroy context related info for an mm_struct that is about
22 * to be put to rest.
23 */
24static inline void destroy_context(struct mm_struct *mm)
25{
26 /* Well, at least free TLB entries */
27 flush_tlb_mm(mm);
28}
29
30static inline unsigned long get_asid(void)
31{
32 unsigned long long sr;
33
34 asm volatile ("getcon " __SR ", %0\n\t"
35 : "=r" (sr));
36
37 sr = (sr >> SR_ASID_SHIFT) & MMU_CONTEXT_ASID_MASK;
38 return (unsigned long) sr;
39}
40
41/* Set ASID into SR */
42static inline void set_asid(unsigned long asid)
43{
44 unsigned long long sr, pc;
45
46 asm volatile ("getcon " __SR ", %0" : "=r" (sr));
47
48 sr = (sr & SR_ASID_MASK) | (asid << SR_ASID_SHIFT);
49
50 /*
51 * It is possible that this function may be inlined and so to avoid
52 * the assembler reporting duplicate symbols we make use of the
53 * gas trick of generating symbols using numerics and forward
54 * reference.
55 */
56 asm volatile ("movi 1, %1\n\t"
57 "shlli %1, 28, %1\n\t"
58 "or %0, %1, %1\n\t"
59 "putcon %1, " __SR "\n\t"
60 "putcon %0, " __SSR "\n\t"
61 "movi 1f, %1\n\t"
62 "ori %1, 1 , %1\n\t"
63 "putcon %1, " __SPC "\n\t"
64 "rte\n"
65 "1:\n\t"
66 : "=r" (sr), "=r" (pc) : "0" (sr));
67}
68
69/* No spare register to twiddle, so use a software cache */
70extern pgd_t *mmu_pdtp_cache;
71
72#define set_TTB(pgd) (mmu_pdtp_cache = (pgd))
73#define get_TTB() (mmu_pdtp_cache)
74
75#endif /* __ASM_SH_MMU_CONTEXT_64_H */
diff --git a/include/asm-sh64/mmu_context.h b/include/asm-sh64/mmu_context.h
deleted file mode 100644
index 507bf72bb8e1..000000000000
--- a/include/asm-sh64/mmu_context.h
+++ /dev/null
@@ -1,208 +0,0 @@
1#ifndef __ASM_SH64_MMU_CONTEXT_H
2#define __ASM_SH64_MMU_CONTEXT_H
3
4/*
5 * This file is subject to the terms and conditions of the GNU General Public
6 * License. See the file "COPYING" in the main directory of this archive
7 * for more details.
8 *
9 * include/asm-sh64/mmu_context.h
10 *
11 * Copyright (C) 2000, 2001 Paolo Alberelli
12 * Copyright (C) 2003 Paul Mundt
13 *
14 * ASID handling idea taken from MIPS implementation.
15 *
16 */
17
18#ifndef __ASSEMBLY__
19
20/*
21 * Cache of MMU context last used.
22 *
23 * The MMU "context" consists of two things:
24 * (a) TLB cache version (or cycle, top 24 bits of mmu_context_cache)
25 * (b) ASID (Address Space IDentifier, bottom 8 bits of mmu_context_cache)
26 */
27extern unsigned long mmu_context_cache;
28
29#include <asm/page.h>
30#include <asm-generic/mm_hooks.h>
31
32/* Current mm's pgd */
33extern pgd_t *mmu_pdtp_cache;
34
35#define SR_ASID_MASK 0xffffffffff00ffffULL
36#define SR_ASID_SHIFT 16
37
38#define MMU_CONTEXT_ASID_MASK 0x000000ff
39#define MMU_CONTEXT_VERSION_MASK 0xffffff00
40#define MMU_CONTEXT_FIRST_VERSION 0x00000100
41#define NO_CONTEXT 0
42
43/* ASID is 8-bit value, so it can't be 0x100 */
44#define MMU_NO_ASID 0x100
45
46
47/*
48 * Virtual Page Number mask
49 */
50#define MMU_VPN_MASK 0xfffff000
51
52static inline void
53get_new_mmu_context(struct mm_struct *mm)
54{
55 extern void flush_tlb_all(void);
56 extern void flush_cache_all(void);
57
58 unsigned long mc = ++mmu_context_cache;
59
60 if (!(mc & MMU_CONTEXT_ASID_MASK)) {
61 /* We exhaust ASID of this version.
62 Flush all TLB and start new cycle. */
63 flush_tlb_all();
64 /* We have to flush all caches as ASIDs are
65 used in cache */
66 flush_cache_all();
67 /* Fix version if needed.
68 Note that we avoid version #0/asid #0 to distingush NO_CONTEXT. */
69 if (!mc)
70 mmu_context_cache = mc = MMU_CONTEXT_FIRST_VERSION;
71 }
72 mm->context = mc;
73}
74
75/*
76 * Get MMU context if needed.
77 */
78static __inline__ void
79get_mmu_context(struct mm_struct *mm)
80{
81 if (mm) {
82 unsigned long mc = mmu_context_cache;
83 /* Check if we have old version of context.
84 If it's old, we need to get new context with new version. */
85 if ((mm->context ^ mc) & MMU_CONTEXT_VERSION_MASK)
86 get_new_mmu_context(mm);
87 }
88}
89
90/*
91 * Initialize the context related info for a new mm_struct
92 * instance.
93 */
94static inline int init_new_context(struct task_struct *tsk,
95 struct mm_struct *mm)
96{
97 mm->context = NO_CONTEXT;
98
99 return 0;
100}
101
102/*
103 * Destroy context related info for an mm_struct that is about
104 * to be put to rest.
105 */
106static inline void destroy_context(struct mm_struct *mm)
107{
108 extern void flush_tlb_mm(struct mm_struct *mm);
109
110 /* Well, at least free TLB entries */
111 flush_tlb_mm(mm);
112}
113
114#endif /* __ASSEMBLY__ */
115
116/* Common defines */
117#define TLB_STEP 0x00000010
118#define TLB_PTEH 0x00000000
119#define TLB_PTEL 0x00000008
120
121/* PTEH defines */
122#define PTEH_ASID_SHIFT 2
123#define PTEH_VALID 0x0000000000000001
124#define PTEH_SHARED 0x0000000000000002
125#define PTEH_MATCH_ASID 0x00000000000003ff
126
127#ifndef __ASSEMBLY__
128/* This has to be a common function because the next location to fill
129 * information is shared. */
130extern void __do_tlb_refill(unsigned long address, unsigned long long is_text_not_data, pte_t *pte);
131
132/* Profiling counter. */
133#ifdef CONFIG_SH64_PROC_TLB
134extern unsigned long long calls_to_do_fast_page_fault;
135#endif
136
137static inline unsigned long get_asid(void)
138{
139 unsigned long long sr;
140
141 asm volatile ("getcon " __SR ", %0\n\t"
142 : "=r" (sr));
143
144 sr = (sr >> SR_ASID_SHIFT) & MMU_CONTEXT_ASID_MASK;
145 return (unsigned long) sr;
146}
147
148/* Set ASID into SR */
149static inline void set_asid(unsigned long asid)
150{
151 unsigned long long sr, pc;
152
153 asm volatile ("getcon " __SR ", %0" : "=r" (sr));
154
155 sr = (sr & SR_ASID_MASK) | (asid << SR_ASID_SHIFT);
156
157 /*
158 * It is possible that this function may be inlined and so to avoid
159 * the assembler reporting duplicate symbols we make use of the gas trick
160 * of generating symbols using numerics and forward reference.
161 */
162 asm volatile ("movi 1, %1\n\t"
163 "shlli %1, 28, %1\n\t"
164 "or %0, %1, %1\n\t"
165 "putcon %1, " __SR "\n\t"
166 "putcon %0, " __SSR "\n\t"
167 "movi 1f, %1\n\t"
168 "ori %1, 1 , %1\n\t"
169 "putcon %1, " __SPC "\n\t"
170 "rte\n"
171 "1:\n\t"
172 : "=r" (sr), "=r" (pc) : "0" (sr));
173}
174
175/*
176 * After we have set current->mm to a new value, this activates
177 * the context for the new mm so we see the new mappings.
178 */
179static __inline__ void activate_context(struct mm_struct *mm)
180{
181 get_mmu_context(mm);
182 set_asid(mm->context & MMU_CONTEXT_ASID_MASK);
183}
184
185
186static __inline__ void switch_mm(struct mm_struct *prev,
187 struct mm_struct *next,
188 struct task_struct *tsk)
189{
190 if (prev != next) {
191 mmu_pdtp_cache = next->pgd;
192 activate_context(next);
193 }
194}
195
196#define deactivate_mm(tsk,mm) do { } while (0)
197
198#define activate_mm(prev, next) \
199 switch_mm((prev),(next),NULL)
200
201static inline void
202enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
203{
204}
205
206#endif /* __ASSEMBLY__ */
207
208#endif /* __ASM_SH64_MMU_CONTEXT_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-23 08:26:23 -0500