diff options
author | Bryan Wu <cooloney@kernel.org> | 2008-08-26 22:51:02 -0400 |
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committer | Bryan Wu <cooloney@kernel.org> | 2008-08-26 22:51:02 -0400 |
commit | 639f6571458948b5112be2cf00c0c2c04db2897d (patch) | |
tree | a4dd7af33d0e92c935ba1e904f6fb7e923ac825e /include/asm-blackfin/mmu_context.h | |
parent | 3d9b7a5ce534f3963afcf8f4777267e5899fe007 (diff) |
Blackfin arch: move include/asm-blackfin header files to arch/blackfin
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'include/asm-blackfin/mmu_context.h')
-rw-r--r-- | include/asm-blackfin/mmu_context.h | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/include/asm-blackfin/mmu_context.h b/include/asm-blackfin/mmu_context.h deleted file mode 100644 index 8529552a981f..000000000000 --- a/include/asm-blackfin/mmu_context.h +++ /dev/null | |||
@@ -1,183 +0,0 @@ | |||
1 | /* | ||
2 | * File: include/asm-blackfin/mmu_context.h | ||
3 | * Based on: | ||
4 | * Author: | ||
5 | * | ||
6 | * Created: | ||
7 | * Description: | ||
8 | * | ||
9 | * Modified: | ||
10 | * Copyright 2004-2006 Analog Devices Inc. | ||
11 | * | ||
12 | * Bugs: Enter bugs at http://blackfin.uclinux.org/ | ||
13 | * | ||
14 | * This program is free software; you can redistribute it and/or modify | ||
15 | * it under the terms of the GNU General Public License as published by | ||
16 | * the Free Software Foundation; either version 2 of the License, or | ||
17 | * (at your option) any later version. | ||
18 | * | ||
19 | * This program is distributed in the hope that it will be useful, | ||
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
22 | * GNU General Public License for more details. | ||
23 | * | ||
24 | * You should have received a copy of the GNU General Public License | ||
25 | * along with this program; if not, see the file COPYING, or write | ||
26 | * to the Free Software Foundation, Inc., | ||
27 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | ||
28 | */ | ||
29 | |||
30 | #ifndef __BLACKFIN_MMU_CONTEXT_H__ | ||
31 | #define __BLACKFIN_MMU_CONTEXT_H__ | ||
32 | |||
33 | #include <linux/gfp.h> | ||
34 | #include <linux/sched.h> | ||
35 | #include <asm/setup.h> | ||
36 | #include <asm/page.h> | ||
37 | #include <asm/pgalloc.h> | ||
38 | #include <asm/cplbinit.h> | ||
39 | |||
40 | extern void *current_l1_stack_save; | ||
41 | extern int nr_l1stack_tasks; | ||
42 | extern void *l1_stack_base; | ||
43 | extern unsigned long l1_stack_len; | ||
44 | |||
45 | extern int l1sram_free(const void*); | ||
46 | extern void *l1sram_alloc_max(void*); | ||
47 | |||
48 | static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) | ||
49 | { | ||
50 | } | ||
51 | |||
52 | /* Called when creating a new context during fork() or execve(). */ | ||
53 | static inline int | ||
54 | init_new_context(struct task_struct *tsk, struct mm_struct *mm) | ||
55 | { | ||
56 | #ifdef CONFIG_MPU | ||
57 | unsigned long p = __get_free_pages(GFP_KERNEL, page_mask_order); | ||
58 | mm->context.page_rwx_mask = (unsigned long *)p; | ||
59 | memset(mm->context.page_rwx_mask, 0, | ||
60 | page_mask_nelts * 3 * sizeof(long)); | ||
61 | #endif | ||
62 | return 0; | ||
63 | } | ||
64 | |||
65 | static inline void free_l1stack(void) | ||
66 | { | ||
67 | nr_l1stack_tasks--; | ||
68 | if (nr_l1stack_tasks == 0) | ||
69 | l1sram_free(l1_stack_base); | ||
70 | } | ||
71 | static inline void destroy_context(struct mm_struct *mm) | ||
72 | { | ||
73 | struct sram_list_struct *tmp; | ||
74 | |||
75 | if (current_l1_stack_save == mm->context.l1_stack_save) | ||
76 | current_l1_stack_save = NULL; | ||
77 | if (mm->context.l1_stack_save) | ||
78 | free_l1stack(); | ||
79 | |||
80 | while ((tmp = mm->context.sram_list)) { | ||
81 | mm->context.sram_list = tmp->next; | ||
82 | sram_free(tmp->addr); | ||
83 | kfree(tmp); | ||
84 | } | ||
85 | #ifdef CONFIG_MPU | ||
86 | if (current_rwx_mask == mm->context.page_rwx_mask) | ||
87 | current_rwx_mask = NULL; | ||
88 | free_pages((unsigned long)mm->context.page_rwx_mask, page_mask_order); | ||
89 | #endif | ||
90 | } | ||
91 | |||
92 | static inline unsigned long | ||
93 | alloc_l1stack(unsigned long length, unsigned long *stack_base) | ||
94 | { | ||
95 | if (nr_l1stack_tasks == 0) { | ||
96 | l1_stack_base = l1sram_alloc_max(&l1_stack_len); | ||
97 | if (!l1_stack_base) | ||
98 | return 0; | ||
99 | } | ||
100 | |||
101 | if (l1_stack_len < length) { | ||
102 | if (nr_l1stack_tasks == 0) | ||
103 | l1sram_free(l1_stack_base); | ||
104 | return 0; | ||
105 | } | ||
106 | *stack_base = (unsigned long)l1_stack_base; | ||
107 | nr_l1stack_tasks++; | ||
108 | return l1_stack_len; | ||
109 | } | ||
110 | |||
111 | static inline int | ||
112 | activate_l1stack(struct mm_struct *mm, unsigned long sp_base) | ||
113 | { | ||
114 | if (current_l1_stack_save) | ||
115 | memcpy(current_l1_stack_save, l1_stack_base, l1_stack_len); | ||
116 | mm->context.l1_stack_save = current_l1_stack_save = (void*)sp_base; | ||
117 | memcpy(l1_stack_base, current_l1_stack_save, l1_stack_len); | ||
118 | return 1; | ||
119 | } | ||
120 | |||
121 | #define deactivate_mm(tsk,mm) do { } while (0) | ||
122 | |||
123 | #define activate_mm(prev, next) switch_mm(prev, next, NULL) | ||
124 | |||
125 | static inline void switch_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm, | ||
126 | struct task_struct *tsk) | ||
127 | { | ||
128 | if (prev_mm == next_mm) | ||
129 | return; | ||
130 | #ifdef CONFIG_MPU | ||
131 | if (prev_mm->context.page_rwx_mask == current_rwx_mask) { | ||
132 | flush_switched_cplbs(); | ||
133 | set_mask_dcplbs(next_mm->context.page_rwx_mask); | ||
134 | } | ||
135 | #endif | ||
136 | |||
137 | /* L1 stack switching. */ | ||
138 | if (!next_mm->context.l1_stack_save) | ||
139 | return; | ||
140 | if (next_mm->context.l1_stack_save == current_l1_stack_save) | ||
141 | return; | ||
142 | if (current_l1_stack_save) { | ||
143 | memcpy(current_l1_stack_save, l1_stack_base, l1_stack_len); | ||
144 | } | ||
145 | current_l1_stack_save = next_mm->context.l1_stack_save; | ||
146 | memcpy(l1_stack_base, current_l1_stack_save, l1_stack_len); | ||
147 | } | ||
148 | |||
149 | #ifdef CONFIG_MPU | ||
150 | static inline void protect_page(struct mm_struct *mm, unsigned long addr, | ||
151 | unsigned long flags) | ||
152 | { | ||
153 | unsigned long *mask = mm->context.page_rwx_mask; | ||
154 | unsigned long page = addr >> 12; | ||
155 | unsigned long idx = page >> 5; | ||
156 | unsigned long bit = 1 << (page & 31); | ||
157 | |||
158 | if (flags & VM_MAYREAD) | ||
159 | mask[idx] |= bit; | ||
160 | else | ||
161 | mask[idx] &= ~bit; | ||
162 | mask += page_mask_nelts; | ||
163 | if (flags & VM_MAYWRITE) | ||
164 | mask[idx] |= bit; | ||
165 | else | ||
166 | mask[idx] &= ~bit; | ||
167 | mask += page_mask_nelts; | ||
168 | if (flags & VM_MAYEXEC) | ||
169 | mask[idx] |= bit; | ||
170 | else | ||
171 | mask[idx] &= ~bit; | ||
172 | } | ||
173 | |||
174 | static inline void update_protections(struct mm_struct *mm) | ||
175 | { | ||
176 | if (mm->context.page_rwx_mask == current_rwx_mask) { | ||
177 | flush_switched_cplbs(); | ||
178 | set_mask_dcplbs(mm->context.page_rwx_mask); | ||
179 | } | ||
180 | } | ||
181 | #endif | ||
182 | |||
183 | #endif | ||