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1 | /* |
1 | /* |
2 | * Copyright (c) 2006 Martin Decky |
2 | * Copyright (c) 2006 Martin Decky |
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 | /** @addtogroup genericmm |
29 | /** @addtogroup genericmm |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | 32 | ||
33 | /** |
33 | /** |
34 | * @file |
34 | * @file |
35 | * @brief RAM disk support. |
35 | * @brief RAM disk support. |
36 | * |
36 | * |
37 | * Support for RAM disk images. |
37 | * Support for RAM disk images. |
38 | */ |
38 | */ |
39 | 39 | ||
40 | #include <lib/rd.h> |
40 | #include <lib/rd.h> |
41 | #include <arch/byteorder.h> |
41 | #include <arch/byteorder.h> |
42 | #include <mm/frame.h> |
42 | #include <mm/frame.h> |
43 | #include <sysinfo/sysinfo.h> |
43 | #include <sysinfo/sysinfo.h> |
44 | #include <ddi/ddi.h> |
44 | #include <ddi/ddi.h> |
45 | #include <print.h> |
45 | #include <print.h> |
46 | #include <align.h> |
46 | #include <align.h> |
47 | 47 | ||
48 | static parea_t rd_parea; /**< Physical memory area for rd. */ |
48 | static parea_t rd_parea; /**< Physical memory area for rd. */ |
49 | 49 | ||
- | 50 | /** |
|
- | 51 | * RAM disk initialization routine. At this point, the RAM disk memory is shared |
|
- | 52 | * and information about the share is provided as sysinfo values to the userspace |
|
- | 53 | * tasks. |
|
- | 54 | * / |
|
50 | int init_rd(rd_header * header, size_t size) |
55 | int init_rd(rd_header * header, size_t size) |
51 | { |
56 | { |
52 | //printf("Header magic %c%c%c%c\n",header->magic[0],header->magic[1],header->magic[2],header->magic[3]); |
57 | //printf("Header magic %c%c%c%c\n",header->magic[0],header->magic[1],header->magic[2],header->magic[3]); |
53 | 58 | ||
54 | /* Identify RAM disk */ |
59 | /* Identify RAM disk */ |
55 | if ((header->magic[0] != RD_MAG0) || (header->magic[1] != RD_MAG1) || |
60 | if ((header->magic[0] != RD_MAG0) || (header->magic[1] != RD_MAG1) || |
56 | (header->magic[2] != RD_MAG2) || (header->magic[3] != RD_MAG3)) |
61 | (header->magic[2] != RD_MAG2) || (header->magic[3] != RD_MAG3)) |
57 | return RE_INVALID; |
62 | return RE_INVALID; |
58 | 63 | ||
59 | //printf("Header version %d\n",header->version); |
64 | //printf("Header version %d\n",header->version); |
60 | //printf("Expected version %d\n",RD_VERSION); |
65 | //printf("Expected version %d\n",RD_VERSION); |
61 | 66 | ||
62 | /* Identify version */ |
67 | /* Identify version */ |
63 | if (header->version != RD_VERSION) |
68 | if (header->version != RD_VERSION) |
64 | return RE_UNSUPPORTED; |
69 | return RE_UNSUPPORTED; |
65 | 70 | ||
66 | //printf("Header type %d\n",header->data_type); |
71 | //printf("Header type %d\n",header->data_type); |
67 | 72 | ||
68 | uint32_t hsize; |
73 | uint32_t hsize; |
69 | uint64_t dsize; |
74 | uint64_t dsize; |
70 | switch (header->data_type) { |
75 | switch (header->data_type) { |
71 | case RD_DATA_LSB: |
76 | case RD_DATA_LSB: |
72 | hsize = uint32_t_le2host(header->header_size); |
77 | hsize = uint32_t_le2host(header->header_size); |
73 | dsize = uint64_t_le2host(header->data_size); |
78 | dsize = uint64_t_le2host(header->data_size); |
74 | break; |
79 | break; |
75 | case RD_DATA_MSB: |
80 | case RD_DATA_MSB: |
76 | hsize = uint32_t_be2host(header->header_size); |
81 | hsize = uint32_t_be2host(header->header_size); |
77 | dsize = uint64_t_be2host(header->data_size); |
82 | dsize = uint64_t_be2host(header->data_size); |
78 | break; |
83 | break; |
79 | default: |
84 | default: |
80 | return RE_UNSUPPORTED; |
85 | return RE_UNSUPPORTED; |
81 | } |
86 | } |
82 | 87 | ||
83 | //printf("Header size %d\n",header->header_size); |
88 | //printf("Header size %d\n",header->header_size); |
84 | //printf("Data size %d\n",header->data_size); |
89 | //printf("Data size %d\n",header->data_size); |
85 | //printf("Size %d\n",size); |
90 | //printf("Size %d\n",size); |
86 | 91 | ||
87 | //jelen: does this make any sense? (we don't even care about the header size, do we?) |
92 | //jelen: does this make any sense? (we don't even care about the header size, do we?) |
88 | /* |
93 | /* |
89 | if ((hsize % FRAME_SIZE) || (dsize % FRAME_SIZE)) |
94 | if ((hsize % FRAME_SIZE) || (dsize % FRAME_SIZE)) |
90 | return RE_UNSUPPORTED; |
95 | return RE_UNSUPPORTED; |
91 | */ |
96 | */ |
92 | if (dsize % FRAME_SIZE) |
97 | if (dsize % FRAME_SIZE) |
93 | return RE_UNSUPPORTED; |
98 | return RE_UNSUPPORTED; |
94 | 99 | ||
95 | if (hsize > size) |
100 | if (hsize > size) |
96 | return RE_INVALID; |
101 | return RE_INVALID; |
97 | 102 | ||
98 | if ((uint64_t) hsize + dsize > size) |
103 | if ((uint64_t) hsize + dsize > size) |
99 | dsize = size - hsize; |
104 | dsize = size - hsize; |
100 | 105 | ||
101 | rd_parea.pbase = ALIGN_DOWN((uintptr_t)KA2PA((void *) header + hsize), FRAME_SIZE); |
106 | rd_parea.pbase = ALIGN_DOWN((uintptr_t)KA2PA((void *) header + hsize), FRAME_SIZE); |
102 | rd_parea.vbase = (uintptr_t) ((void *) header + hsize); |
107 | rd_parea.vbase = (uintptr_t) ((void *) header + hsize); |
103 | rd_parea.frames = SIZE2FRAMES(dsize); |
108 | rd_parea.frames = SIZE2FRAMES(dsize); |
104 | rd_parea.cacheable = true; |
109 | rd_parea.cacheable = true; |
105 | ddi_parea_register(&rd_parea); |
110 | ddi_parea_register(&rd_parea); |
106 | 111 | ||
107 | 112 | ||
108 | sysinfo_set_item_val("rd", NULL, true); |
113 | sysinfo_set_item_val("rd", NULL, true); |
109 | sysinfo_set_item_val("rd.header_size", NULL, hsize); |
114 | sysinfo_set_item_val("rd.header_size", NULL, hsize); |
110 | sysinfo_set_item_val("rd.size", NULL, dsize); |
115 | sysinfo_set_item_val("rd.size", NULL, dsize); |
111 | sysinfo_set_item_val("rd.address.physical", NULL, (unative_t) |
116 | sysinfo_set_item_val("rd.address.physical", NULL, (unative_t) |
112 | KA2PA((void *) header + hsize)); |
117 | KA2PA((void *) header + hsize)); |
113 | 118 | ||
114 | return RE_OK; |
119 | return RE_OK; |
115 | } |
120 | } |
116 | 121 | ||
117 | /** @} |
122 | /** @} |
118 | */ |
123 | */ |
119 | 124 |