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Commit | Line | Data |
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bbee0f2b | 1 | /* |
2 | * GRUB -- GRand Unified Bootloader | |
3 | * Copyright (C) 2009 Free Software Foundation, Inc. | |
4 | * | |
5 | * GRUB is free software: you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation, either version 3 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * GRUB is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with GRUB. If not, see <http://www.gnu.org/licenses/>. | |
17 | */ | |
18 | ||
19 | #include <grub/normal.h> | |
20 | #include <grub/dl.h> | |
21 | #include <grub/file.h> | |
22 | #include <grub/disk.h> | |
23 | #include <grub/misc.h> | |
24 | #include <grub/xnu.h> | |
25 | #include <grub/cpu/xnu.h> | |
26 | #include <grub/mm.h> | |
27 | #include <grub/loader.h> | |
7a45a539 | 28 | #include <grub/i18n.h> |
bbee0f2b | 29 | |
30 | static void *grub_xnu_hibernate_image; | |
31 | ||
32 | static grub_err_t | |
33 | grub_xnu_resume_unload (void) | |
34 | { | |
35 | /* Free loaded image */ | |
36 | if (grub_xnu_hibernate_image) | |
37 | grub_free (grub_xnu_hibernate_image); | |
38 | grub_xnu_hibernate_image = 0; | |
39 | grub_xnu_unlock (); | |
40 | return GRUB_ERR_NONE; | |
41 | } | |
42 | ||
43 | grub_err_t | |
44 | grub_xnu_resume (char *imagename) | |
45 | { | |
46 | grub_file_t file; | |
47 | grub_size_t total_header_size; | |
48 | struct grub_xnu_hibernate_header hibhead; | |
cb1b2ad7 VS |
49 | void *code; |
50 | void *image; | |
bbee0f2b | 51 | grub_uint32_t codedest; |
52 | grub_uint32_t codesize; | |
cb1b2ad7 VS |
53 | grub_addr_t target_image; |
54 | grub_err_t err; | |
bbee0f2b | 55 | |
ca0a4f68 VS |
56 | file = grub_file_open (imagename, GRUB_FILE_TYPE_XNU_HIBERNATE_IMAGE |
57 | | GRUB_FILE_TYPE_NO_DECOMPRESS); | |
bbee0f2b | 58 | if (! file) |
59 | return 0; | |
b39f9d20 | 60 | |
bbee0f2b | 61 | /* Read the header. */ |
5c5215d5 | 62 | if (grub_file_read (file, &hibhead, sizeof (hibhead)) |
7a45a539 | 63 | != sizeof (hibhead)) |
bbee0f2b | 64 | { |
65 | grub_file_close (file); | |
7a45a539 VS |
66 | if (!grub_errno) |
67 | grub_error (GRUB_ERR_READ_ERROR, | |
68 | N_("premature end of file %s"), imagename); | |
69 | return grub_errno; | |
bbee0f2b | 70 | } |
71 | ||
72 | /* Check the header. */ | |
73 | if (hibhead.magic != GRUB_XNU_HIBERNATE_MAGIC) | |
74 | { | |
75 | grub_file_close (file); | |
b39f9d20 | 76 | return grub_error (GRUB_ERR_BAD_OS, |
bbee0f2b | 77 | "hibernate header has incorrect magic number"); |
78 | } | |
79 | if (hibhead.encoffset) | |
80 | { | |
81 | grub_file_close (file); | |
b39f9d20 | 82 | return grub_error (GRUB_ERR_BAD_OS, |
bbee0f2b | 83 | "encrypted images aren't supported yet"); |
84 | } | |
85 | ||
954f7bf5 VS |
86 | if (hibhead.image_size == 0) |
87 | { | |
88 | grub_file_close (file); | |
89 | return grub_error (GRUB_ERR_BAD_OS, | |
90 | "hibernate image is empty"); | |
91 | } | |
92 | ||
bbee0f2b | 93 | codedest = hibhead.launchcode_target_page; |
94 | codedest *= GRUB_XNU_PAGESIZE; | |
95 | codesize = hibhead.launchcode_numpages; | |
96 | codesize *= GRUB_XNU_PAGESIZE; | |
97 | ||
98 | /* FIXME: check that codedest..codedest+codesize is available. */ | |
99 | ||
100 | /* Calculate total size before pages to copy. */ | |
101 | total_header_size = hibhead.extmapsize + sizeof (hibhead); | |
102 | ||
103 | /* Unload image if any. */ | |
104 | if (grub_xnu_hibernate_image) | |
105 | grub_free (grub_xnu_hibernate_image); | |
106 | ||
b39f9d20 | 107 | /* Try to allocate necessary space. |
bbee0f2b | 108 | FIXME: mm isn't good enough yet to handle huge allocations. |
109 | */ | |
cb1b2ad7 VS |
110 | grub_xnu_relocator = grub_relocator_new (); |
111 | if (!grub_xnu_relocator) | |
bbee0f2b | 112 | { |
113 | grub_file_close (file); | |
15919498 | 114 | return grub_errno; |
bbee0f2b | 115 | } |
116 | ||
4b2ec20b VS |
117 | { |
118 | grub_relocator_chunk_t ch; | |
119 | err = grub_relocator_alloc_chunk_addr (grub_xnu_relocator, &ch, codedest, | |
120 | codesize + GRUB_XNU_PAGESIZE); | |
121 | if (err) | |
122 | { | |
123 | grub_file_close (file); | |
124 | return err; | |
125 | } | |
126 | code = get_virtual_current_address (ch); | |
127 | } | |
cb1b2ad7 | 128 | |
4b2ec20b VS |
129 | { |
130 | grub_relocator_chunk_t ch; | |
131 | err = grub_relocator_alloc_chunk_align (grub_xnu_relocator, &ch, 0, | |
132 | (0xffffffff - hibhead.image_size) + 1, | |
133 | hibhead.image_size, | |
134 | GRUB_XNU_PAGESIZE, | |
9be4c45d | 135 | GRUB_RELOCATOR_PREFERENCE_NONE, 0); |
4b2ec20b VS |
136 | if (err) |
137 | { | |
138 | grub_file_close (file); | |
139 | return err; | |
140 | } | |
141 | image = get_virtual_current_address (ch); | |
142 | target_image = get_physical_target_address (ch); | |
143 | } | |
cb1b2ad7 | 144 | |
5a0e0cc6 VS |
145 | /* Read code part. */ |
146 | if (grub_file_seek (file, total_header_size) == (grub_off_t) -1 | |
cb1b2ad7 | 147 | || grub_file_read (file, code, codesize) |
5a0e0cc6 VS |
148 | != (grub_ssize_t) codesize) |
149 | { | |
150 | grub_file_close (file); | |
7a45a539 VS |
151 | if (!grub_errno) |
152 | grub_error (GRUB_ERR_READ_ERROR, | |
153 | N_("premature end of file %s"), imagename); | |
154 | return grub_errno; | |
5a0e0cc6 VS |
155 | } |
156 | ||
bbee0f2b | 157 | /* Read image. */ |
5a0e0cc6 | 158 | if (grub_file_seek (file, 0) == (grub_off_t) -1 |
cb1b2ad7 | 159 | || grub_file_read (file, image, hibhead.image_size) |
bbee0f2b | 160 | != (grub_ssize_t) hibhead.image_size) |
161 | { | |
162 | grub_file_close (file); | |
7a45a539 VS |
163 | if (!grub_errno) |
164 | grub_error (GRUB_ERR_READ_ERROR, | |
165 | N_("premature end of file %s"), imagename); | |
166 | return grub_errno; | |
bbee0f2b | 167 | } |
168 | grub_file_close (file); | |
169 | ||
bbee0f2b | 170 | /* Setup variables needed by asm helper. */ |
cb1b2ad7 VS |
171 | grub_xnu_heap_target_start = codedest; |
172 | grub_xnu_heap_size = target_image + hibhead.image_size - codedest; | |
bbee0f2b | 173 | grub_xnu_stack = (codedest + hibhead.stack); |
174 | grub_xnu_entry_point = (codedest + hibhead.entry_point); | |
cb1b2ad7 | 175 | grub_xnu_arg1 = target_image; |
5a0e0cc6 VS |
176 | |
177 | grub_dprintf ("xnu", "entry point 0x%x\n", codedest + hibhead.entry_point); | |
178 | grub_dprintf ("xnu", "image at 0x%x\n", | |
179 | codedest + codesize + GRUB_XNU_PAGESIZE); | |
bbee0f2b | 180 | |
bbee0f2b | 181 | /* We're ready now. */ |
15919498 | 182 | grub_loader_set (grub_xnu_boot_resume, |
bbee0f2b | 183 | grub_xnu_resume_unload, 0); |
184 | ||
185 | /* Prevent module from unloading. */ | |
186 | grub_xnu_lock (); | |
187 | return GRUB_ERR_NONE; | |
188 | } |