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1 | /* |
1 | /* |
2 | * Copyright (C) 2006 Jakub Jermar |
2 | * Copyright (C) 2006 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #include <ddi/ddi.h> |
29 | #include <ddi/ddi.h> |
30 | #include <ddi/ddi_arg.h> |
30 | #include <ddi/ddi_arg.h> |
31 | #include <proc/task.h> |
31 | #include <proc/task.h> |
32 | #include <security/cap.h> |
32 | #include <security/cap.h> |
33 | #include <mm/frame.h> |
33 | #include <mm/frame.h> |
34 | #include <mm/page.h> |
34 | #include <mm/page.h> |
35 | #include <mm/as.h> |
35 | #include <mm/as.h> |
36 | #include <synch/spinlock.h> |
36 | #include <synch/spinlock.h> |
37 | #include <arch.h> |
37 | #include <arch.h> |
38 | #include <align.h> |
38 | #include <align.h> |
39 | #include <errno.h> |
39 | #include <errno.h> |
40 | 40 | ||
41 | /** Map piece of physical memory into virtual address space of specified task. |
41 | /** Map piece of physical memory into virtual address space of specified task. |
42 | * |
42 | * |
43 | * @param id Task ID of the destination task. |
43 | * @param id Task ID of the destination task. |
44 | * @param pf Physical frame address of the starting frame. |
44 | * @param pf Physical frame address of the starting frame. |
45 | * @param vp Virtual page address of the starting page. |
45 | * @param vp Virtual page address of the starting page. |
46 | * @param pages Number of pages to map. |
46 | * @param pages Number of pages to map. |
47 | * @param writable If true, the mapping will be created writable. |
47 | * @param writable If true, the mapping will be created writable. |
48 | * |
48 | * |
49 | * @return 0 on success, EPERM if the caller lacks capabilities to use this syscall, |
49 | * @return 0 on success, EPERM if the caller lacks capabilities to use this syscall, |
50 | * ENOENT if there is no task matching the specified ID and ENOMEM if |
50 | * ENOENT if there is no task matching the specified ID and ENOMEM if |
51 | * there was a problem in creating address space area. |
51 | * there was a problem in creating address space area. |
52 | */ |
52 | */ |
53 | static int ddi_map_physmem(task_id_t id, __address pf, __address vp, count_t pages, bool writable) |
53 | static int ddi_map_physmem(task_id_t id, __address pf, __address vp, count_t pages, bool writable) |
54 | { |
54 | { |
55 | ipl_t ipl; |
55 | ipl_t ipl; |
56 | cap_t caps; |
56 | cap_t caps; |
57 | task_t *t; |
57 | task_t *t; |
58 | int flags; |
58 | int flags; |
59 | count_t i; |
59 | count_t i; |
60 | 60 | ||
61 | /* |
61 | /* |
62 | * Make sure the caller is authorised to make this syscall. |
62 | * Make sure the caller is authorised to make this syscall. |
63 | */ |
63 | */ |
64 | caps = cap_get(TASK); |
64 | caps = cap_get(TASK); |
65 | if (!(caps & CAP_MEM_MANAGER)) |
65 | if (!(caps & CAP_MEM_MANAGER)) |
66 | return EPERM; |
66 | return EPERM; |
67 | 67 | ||
68 | ipl = interrupts_disable(); |
68 | ipl = interrupts_disable(); |
69 | spinlock_lock(&tasks_lock); |
69 | spinlock_lock(&tasks_lock); |
70 | 70 | ||
71 | t = task_find_by_id(id); |
71 | t = task_find_by_id(id); |
72 | 72 | ||
73 | if (!t) { |
73 | if (!t) { |
74 | /* |
74 | /* |
75 | * There is no task with the specified ID. |
75 | * There is no task with the specified ID. |
76 | */ |
76 | */ |
77 | spinlock_unlock(&tasks_lock); |
77 | spinlock_unlock(&tasks_lock); |
78 | interrupts_restore(ipl); |
78 | interrupts_restore(ipl); |
79 | return ENOENT; |
79 | return ENOENT; |
80 | } |
80 | } |
81 | 81 | ||
82 | /* |
82 | /* |
83 | * TODO: We are currently lacking support for task destroying. |
83 | * TODO: We are currently lacking support for task destroying. |
84 | * Once it is added to the kernel, we must take care to |
84 | * Once it is added to the kernel, we must take care to |
85 | * synchronize in a way that prevents race conditions here. |
85 | * synchronize in a way that prevents race conditions here. |
86 | */ |
86 | */ |
87 | 87 | ||
88 | /* Lock the task and release the lock protecting tasks_btree. */ |
88 | /* Lock the task and release the lock protecting tasks_btree. */ |
89 | spinlock_lock(&t->lock); |
89 | spinlock_lock(&t->lock); |
90 | spinlock_unlock(&tasks_lock); |
90 | spinlock_unlock(&tasks_lock); |
91 | 91 | ||
92 | flags = AS_AREA_DEVICE | AS_AREA_READ; |
92 | flags = AS_AREA_DEVICE | AS_AREA_READ; |
93 | if (writable) |
93 | if (writable) |
94 | flags |= AS_AREA_WRITE; |
94 | flags |= AS_AREA_WRITE; |
95 | if (!as_area_create(t->as, flags, pages * PAGE_SIZE, vp)) { |
95 | if (!as_area_create(t->as, flags, pages * PAGE_SIZE, vp)) { |
96 | /* |
96 | /* |
97 | * The address space area could not have been created. |
97 | * The address space area could not have been created. |
98 | * We report it using ENOMEM. |
98 | * We report it using ENOMEM. |
99 | */ |
99 | */ |
100 | spinlock_unlock(&t->lock); |
100 | spinlock_unlock(&t->lock); |
101 | interrupts_restore(ipl); |
101 | interrupts_restore(ipl); |
102 | return ENOMEM; |
102 | return ENOMEM; |
103 | } |
103 | } |
104 | 104 | ||
105 | /* Initialize page tables. */ |
105 | /* Initialize page tables. */ |
106 | for (i = 0; i < pages; i++) |
106 | for (i = 0; i < pages; i++) |
107 | as_set_mapping(t->as, vp + i * PAGE_SIZE, pf + i * FRAME_SIZE); |
107 | as_set_mapping(t->as, vp + i * PAGE_SIZE, pf + i * FRAME_SIZE); |
108 | 108 | ||
109 | spinlock_unlock(&t->lock); |
109 | spinlock_unlock(&t->lock); |
110 | interrupts_restore(ipl); |
110 | interrupts_restore(ipl); |
111 | return 0; |
111 | return 0; |
112 | } |
112 | } |
113 | 113 | ||
- | 114 | /** Enable range of I/O space for task. |
|
- | 115 | * |
|
- | 116 | * @param id Task ID of the destination task. |
|
- | 117 | * @param ioaddr Starting I/O address. |
|
- | 118 | * @param size Size of the enabled I/O space.. |
|
- | 119 | * |
|
- | 120 | * @return 0 on success, EPERM if the caller lacks capabilities to use this syscall, |
|
- | 121 | * ENOENT if there is no task matching the specified ID. |
|
- | 122 | */ |
|
- | 123 | static int ddi_enable_iospace(task_id_t id, __address ioaddr, size_t size) |
|
- | 124 | { |
|
- | 125 | ipl_t ipl; |
|
- | 126 | cap_t caps; |
|
- | 127 | task_t *t; |
|
- | 128 | int rc; |
|
- | 129 | ||
- | 130 | /* |
|
- | 131 | * Make sure the caller is authorised to make this syscall. |
|
- | 132 | */ |
|
- | 133 | caps = cap_get(TASK); |
|
- | 134 | if (!(caps & CAP_IO_MANAGER)) |
|
- | 135 | return EPERM; |
|
- | 136 | ||
- | 137 | ipl = interrupts_disable(); |
|
- | 138 | spinlock_lock(&tasks_lock); |
|
- | 139 | ||
- | 140 | t = task_find_by_id(id); |
|
- | 141 | ||
- | 142 | if (!t) { |
|
- | 143 | /* |
|
- | 144 | * There is no task with the specified ID. |
|
- | 145 | */ |
|
- | 146 | spinlock_unlock(&tasks_lock); |
|
- | 147 | interrupts_restore(ipl); |
|
- | 148 | return ENOENT; |
|
- | 149 | } |
|
- | 150 | ||
- | 151 | /* |
|
- | 152 | * TODO: We are currently lacking support for task destroying. |
|
- | 153 | * Once it is added to the kernel, we must take care to |
|
- | 154 | * synchronize in a way that prevents race conditions here. |
|
- | 155 | */ |
|
- | 156 | ||
- | 157 | /* Lock the task and release the lock protecting tasks_btree. */ |
|
- | 158 | spinlock_lock(&t->lock); |
|
- | 159 | spinlock_unlock(&tasks_lock); |
|
- | 160 | ||
- | 161 | rc = ddi_enable_iospace_arch(t, ioaddr, size); |
|
- | 162 | ||
- | 163 | spinlock_unlock(&t->lock); |
|
- | 164 | interrupts_restore(ipl); |
|
- | 165 | return rc; |
|
- | 166 | } |
|
- | 167 | ||
114 | /** Wrapper for SYS_MAP_PHYSMEM syscall. |
168 | /** Wrapper for SYS_MAP_PHYSMEM syscall. |
115 | * |
169 | * |
116 | * @param User space address of DDI argument structure. |
170 | * @param User space address of memory DDI argument structure. |
117 | * |
171 | * |
118 | * @return 0 on success, otherwise it returns error code found in errno.h |
172 | * @return 0 on success, otherwise it returns error code found in errno.h |
119 | */ |
173 | */ |
120 | __native sys_map_physmem(ddi_arg_t *uspace_ddi_arg) |
174 | __native sys_map_physmem(ddi_memarg_t *uspace_mem_arg) |
121 | { |
175 | { |
122 | ddi_arg_t arg; |
176 | ddi_memarg_t arg; |
123 | 177 | ||
124 | copy_from_uspace(&arg, uspace_ddi_arg, sizeof(ddi_arg_t)); |
178 | copy_from_uspace(&arg, uspace_mem_arg, sizeof(ddi_memarg_t)); |
125 | return (__native) ddi_map_physmem((task_id_t) arg.task_id, ALIGN_DOWN((__address) arg.phys_base, FRAME_SIZE), |
179 | return (__native) ddi_map_physmem((task_id_t) arg.task_id, ALIGN_DOWN((__address) arg.phys_base, FRAME_SIZE), |
126 | ALIGN_DOWN((__address) arg.virt_base, PAGE_SIZE), (count_t) arg.pages, |
180 | ALIGN_DOWN((__address) arg.virt_base, PAGE_SIZE), (count_t) arg.pages, |
127 | (bool) arg.writable); |
181 | (bool) arg.writable); |
128 | } |
182 | } |
- | 183 | ||
- | 184 | /** Wrapper for SYS_ENABLE_IOSPACE syscall. |
|
- | 185 | * |
|
- | 186 | * @param User space address of DDI argument structure. |
|
- | 187 | * |
|
- | 188 | * @return 0 on success, otherwise it returns error code found in errno.h |
|
- | 189 | */ |
|
- | 190 | __native sys_enable_iospace(ddi_ioarg_t *uspace_io_arg) |
|
- | 191 | { |
|
- | 192 | ddi_ioarg_t arg; |
|
- | 193 | ||
- | 194 | copy_from_uspace(&arg, uspace_io_arg, sizeof(ddi_ioarg_t)); |
|
- | 195 | return (__native) ddi_enable_iospace((task_id_t) arg.task_id, (__address) arg.ioaddr, (size_t) arg.size); |
|
- | 196 | } |
|
129 | 197 |