aboutsummaryrefslogtreecommitdiffstats
path: root/arch/m68k
diff options
context:
space:
mode:
authorGreg Ungerer <gerg@uclinux.org>2009-02-09 18:49:00 -0500
committerGreg Ungerer <gerg@uclinux.org>2009-03-24 01:17:45 -0400
commit66d73f00a617be4feb45885a56fc5e6441b30a92 (patch)
tree45b71dc6f4e9895fc4bfa390ed75c974db7a0094 /arch/m68k
parent2844b660358c9230a2e85a0218f0df4046d5c392 (diff)
m68k: merge the mmu and non-mmu versions of mmu_context.h
Simple merge of the mmu and non-mmu versions of mmu_context.h Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Diffstat (limited to 'arch/m68k')
-rw-r--r--arch/m68k/include/asm/mmu_context.h176
-rw-r--r--arch/m68k/include/asm/mmu_context_mm.h154
-rw-r--r--arch/m68k/include/asm/mmu_context_no.h33
3 files changed, 173 insertions, 190 deletions
diff --git a/arch/m68k/include/asm/mmu_context.h b/arch/m68k/include/asm/mmu_context.h
index b440928fc6c7..7d4341e55a99 100644
--- a/arch/m68k/include/asm/mmu_context.h
+++ b/arch/m68k/include/asm/mmu_context.h
@@ -1,5 +1,175 @@
1#ifdef __uClinux__ 1#ifndef __M68K_MMU_CONTEXT_H
2#include "mmu_context_no.h" 2#define __M68K_MMU_CONTEXT_H
3
4#include <asm-generic/mm_hooks.h>
5
6static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
7{
8}
9
10#ifdef CONFIG_MMU
11#ifndef CONFIG_SUN3
12
13#include <asm/setup.h>
14#include <asm/page.h>
15#include <asm/pgalloc.h>
16
17static inline int init_new_context(struct task_struct *tsk,
18 struct mm_struct *mm)
19{
20 mm->context = virt_to_phys(mm->pgd);
21 return 0;
22}
23
24#define destroy_context(mm) do { } while(0)
25
26static inline void switch_mm_0230(struct mm_struct *mm)
27{
28 unsigned long crp[2] = {
29 0x80000000 | _PAGE_TABLE, mm->context
30 };
31 unsigned long tmp;
32
33 asm volatile (".chip 68030");
34
35 /* flush MC68030/MC68020 caches (they are virtually addressed) */
36 asm volatile (
37 "movec %%cacr,%0;"
38 "orw %1,%0; "
39 "movec %0,%%cacr"
40 : "=d" (tmp) : "di" (FLUSH_I_AND_D));
41
42 /* Switch the root pointer. For a 030-only kernel,
43 * avoid flushing the whole ATC, we only need to
44 * flush the user entries. The 68851 does this by
45 * itself. Avoid a runtime check here.
46 */
47 asm volatile (
48#ifdef CPU_M68030_ONLY
49 "pmovefd %0,%%crp; "
50 "pflush #0,#4"
3#else 51#else
4#include "mmu_context_mm.h" 52 "pmove %0,%%crp"
5#endif 53#endif
54 : : "m" (crp[0]));
55
56 asm volatile (".chip 68k");
57}
58
59static inline void switch_mm_0460(struct mm_struct *mm)
60{
61 asm volatile (".chip 68040");
62
63 /* flush address translation cache (user entries) */
64 asm volatile ("pflushan");
65
66 /* switch the root pointer */
67 asm volatile ("movec %0,%%urp" : : "r" (mm->context));
68
69 if (CPU_IS_060) {
70 unsigned long tmp;
71
72 /* clear user entries in the branch cache */
73 asm volatile (
74 "movec %%cacr,%0; "
75 "orl %1,%0; "
76 "movec %0,%%cacr"
77 : "=d" (tmp): "di" (0x00200000));
78 }
79
80 asm volatile (".chip 68k");
81}
82
83static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk)
84{
85 if (prev != next) {
86 if (CPU_IS_020_OR_030)
87 switch_mm_0230(next);
88 else
89 switch_mm_0460(next);
90 }
91}
92
93#define deactivate_mm(tsk,mm) do { } while (0)
94
95static inline void activate_mm(struct mm_struct *prev_mm,
96 struct mm_struct *next_mm)
97{
98 next_mm->context = virt_to_phys(next_mm->pgd);
99
100 if (CPU_IS_020_OR_030)
101 switch_mm_0230(next_mm);
102 else
103 switch_mm_0460(next_mm);
104}
105
106#else /* CONFIG_SUN3 */
107#include <asm/sun3mmu.h>
108#include <linux/sched.h>
109
110extern unsigned long get_free_context(struct mm_struct *mm);
111extern void clear_context(unsigned long context);
112
113/* set the context for a new task to unmapped */
114static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
115{
116 mm->context = SUN3_INVALID_CONTEXT;
117 return 0;
118}
119
120/* find the context given to this process, and if it hasn't already
121 got one, go get one for it. */
122static inline void get_mmu_context(struct mm_struct *mm)
123{
124 if(mm->context == SUN3_INVALID_CONTEXT)
125 mm->context = get_free_context(mm);
126}
127
128/* flush context if allocated... */
129static inline void destroy_context(struct mm_struct *mm)
130{
131 if(mm->context != SUN3_INVALID_CONTEXT)
132 clear_context(mm->context);
133}
134
135static inline void activate_context(struct mm_struct *mm)
136{
137 get_mmu_context(mm);
138 sun3_put_context(mm->context);
139}
140
141static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk)
142{
143 activate_context(tsk->mm);
144}
145
146#define deactivate_mm(tsk,mm) do { } while (0)
147
148static inline void activate_mm(struct mm_struct *prev_mm,
149 struct mm_struct *next_mm)
150{
151 activate_context(next_mm);
152}
153
154#endif
155#else /* !CONFIG_MMU */
156
157static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
158{
159 return 0;
160}
161
162
163static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk)
164{
165}
166
167#define destroy_context(mm) do { } while (0)
168#define deactivate_mm(tsk,mm) do { } while (0)
169
170static inline void activate_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm)
171{
172}
173
174#endif /* CONFIG_MMU */
175#endif /* __M68K_MMU_CONTEXT_H */
diff --git a/arch/m68k/include/asm/mmu_context_mm.h b/arch/m68k/include/asm/mmu_context_mm.h
deleted file mode 100644
index 894dacbcee14..000000000000
--- a/arch/m68k/include/asm/mmu_context_mm.h
+++ /dev/null
@@ -1,154 +0,0 @@
1#ifndef __M68K_MMU_CONTEXT_H
2#define __M68K_MMU_CONTEXT_H
3
4#include <asm-generic/mm_hooks.h>
5
6static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
7{
8}
9
10#ifndef CONFIG_SUN3
11
12#include <asm/setup.h>
13#include <asm/page.h>
14#include <asm/pgalloc.h>
15
16static inline int init_new_context(struct task_struct *tsk,
17 struct mm_struct *mm)
18{
19 mm->context = virt_to_phys(mm->pgd);
20 return 0;
21}
22
23#define destroy_context(mm) do { } while(0)
24
25static inline void switch_mm_0230(struct mm_struct *mm)
26{
27 unsigned long crp[2] = {
28 0x80000000 | _PAGE_TABLE, mm->context
29 };
30 unsigned long tmp;
31
32 asm volatile (".chip 68030");
33
34 /* flush MC68030/MC68020 caches (they are virtually addressed) */
35 asm volatile (
36 "movec %%cacr,%0;"
37 "orw %1,%0; "
38 "movec %0,%%cacr"
39 : "=d" (tmp) : "di" (FLUSH_I_AND_D));
40
41 /* Switch the root pointer. For a 030-only kernel,
42 * avoid flushing the whole ATC, we only need to
43 * flush the user entries. The 68851 does this by
44 * itself. Avoid a runtime check here.
45 */
46 asm volatile (
47#ifdef CPU_M68030_ONLY
48 "pmovefd %0,%%crp; "
49 "pflush #0,#4"
50#else
51 "pmove %0,%%crp"
52#endif
53 : : "m" (crp[0]));
54
55 asm volatile (".chip 68k");
56}
57
58static inline void switch_mm_0460(struct mm_struct *mm)
59{
60 asm volatile (".chip 68040");
61
62 /* flush address translation cache (user entries) */
63 asm volatile ("pflushan");
64
65 /* switch the root pointer */
66 asm volatile ("movec %0,%%urp" : : "r" (mm->context));
67
68 if (CPU_IS_060) {
69 unsigned long tmp;
70
71 /* clear user entries in the branch cache */
72 asm volatile (
73 "movec %%cacr,%0; "
74 "orl %1,%0; "
75 "movec %0,%%cacr"
76 : "=d" (tmp): "di" (0x00200000));
77 }
78
79 asm volatile (".chip 68k");
80}
81
82static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk)
83{
84 if (prev != next) {
85 if (CPU_IS_020_OR_030)
86 switch_mm_0230(next);
87 else
88 switch_mm_0460(next);
89 }
90}
91
92#define deactivate_mm(tsk,mm) do { } while (0)
93
94static inline void activate_mm(struct mm_struct *prev_mm,
95 struct mm_struct *next_mm)
96{
97 next_mm->context = virt_to_phys(next_mm->pgd);
98
99 if (CPU_IS_020_OR_030)
100 switch_mm_0230(next_mm);
101 else
102 switch_mm_0460(next_mm);
103}
104
105#else /* CONFIG_SUN3 */
106#include <asm/sun3mmu.h>
107#include <linux/sched.h>
108
109extern unsigned long get_free_context(struct mm_struct *mm);
110extern void clear_context(unsigned long context);
111
112/* set the context for a new task to unmapped */
113static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
114{
115 mm->context = SUN3_INVALID_CONTEXT;
116 return 0;
117}
118
119/* find the context given to this process, and if it hasn't already
120 got one, go get one for it. */
121static inline void get_mmu_context(struct mm_struct *mm)
122{
123 if(mm->context == SUN3_INVALID_CONTEXT)
124 mm->context = get_free_context(mm);
125}
126
127/* flush context if allocated... */
128static inline void destroy_context(struct mm_struct *mm)
129{
130 if(mm->context != SUN3_INVALID_CONTEXT)
131 clear_context(mm->context);
132}
133
134static inline void activate_context(struct mm_struct *mm)
135{
136 get_mmu_context(mm);
137 sun3_put_context(mm->context);
138}
139
140static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk)
141{
142 activate_context(tsk->mm);
143}
144
145#define deactivate_mm(tsk,mm) do { } while (0)
146
147static inline void activate_mm(struct mm_struct *prev_mm,
148 struct mm_struct *next_mm)
149{
150 activate_context(next_mm);
151}
152
153#endif
154#endif
diff --git a/arch/m68k/include/asm/mmu_context_no.h b/arch/m68k/include/asm/mmu_context_no.h
deleted file mode 100644
index 9ccee4278c97..000000000000
--- a/arch/m68k/include/asm/mmu_context_no.h
+++ /dev/null
@@ -1,33 +0,0 @@
1#ifndef __M68KNOMMU_MMU_CONTEXT_H
2#define __M68KNOMMU_MMU_CONTEXT_H
3
4#include <asm/setup.h>
5#include <asm/page.h>
6#include <asm/pgalloc.h>
7#include <asm-generic/mm_hooks.h>
8
9static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
10{
11}
12
13static inline int
14init_new_context(struct task_struct *tsk, struct mm_struct *mm)
15{
16 // mm->context = virt_to_phys(mm->pgd);
17 return(0);
18}
19
20#define destroy_context(mm) do { } while(0)
21
22static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk)
23{
24}
25
26#define deactivate_mm(tsk,mm) do { } while (0)
27
28static inline void activate_mm(struct mm_struct *prev_mm,
29 struct mm_struct *next_mm)
30{
31}
32
33#endif
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-03 20:29:27 -0400