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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> | |
28 | ||
29 | static void *grub_xnu_hibernate_image; | |
30 | ||
31 | static grub_err_t | |
32 | grub_xnu_resume_unload (void) | |
33 | { | |
34 | /* Free loaded image */ | |
35 | if (grub_xnu_hibernate_image) | |
36 | grub_free (grub_xnu_hibernate_image); | |
37 | grub_xnu_hibernate_image = 0; | |
38 | grub_xnu_unlock (); | |
39 | return GRUB_ERR_NONE; | |
40 | } | |
41 | ||
42 | grub_err_t | |
43 | grub_xnu_resume (char *imagename) | |
44 | { | |
45 | grub_file_t file; | |
46 | grub_size_t total_header_size; | |
47 | struct grub_xnu_hibernate_header hibhead; | |
cb1b2ad7 VS |
48 | void *code; |
49 | void *image; | |
bbee0f2b | 50 | grub_uint32_t codedest; |
51 | grub_uint32_t codesize; | |
cb1b2ad7 VS |
52 | grub_addr_t target_image; |
53 | grub_err_t err; | |
bbee0f2b | 54 | |
fc2ef117 | 55 | grub_file_filter_disable_compression (); |
bbee0f2b | 56 | file = grub_file_open (imagename); |
57 | if (! file) | |
58 | return 0; | |
b39f9d20 | 59 | |
bbee0f2b | 60 | /* Read the header. */ |
5c5215d5 | 61 | if (grub_file_read (file, &hibhead, sizeof (hibhead)) |
bbee0f2b | 62 | !=sizeof (hibhead)) |
63 | { | |
64 | grub_file_close (file); | |
b39f9d20 | 65 | return grub_error (GRUB_ERR_READ_ERROR, |
bbee0f2b | 66 | "cannot read the hibernate header"); |
67 | } | |
68 | ||
69 | /* Check the header. */ | |
70 | if (hibhead.magic != GRUB_XNU_HIBERNATE_MAGIC) | |
71 | { | |
72 | grub_file_close (file); | |
b39f9d20 | 73 | return grub_error (GRUB_ERR_BAD_OS, |
bbee0f2b | 74 | "hibernate header has incorrect magic number"); |
75 | } | |
76 | if (hibhead.encoffset) | |
77 | { | |
78 | grub_file_close (file); | |
b39f9d20 | 79 | return grub_error (GRUB_ERR_BAD_OS, |
bbee0f2b | 80 | "encrypted images aren't supported yet"); |
81 | } | |
82 | ||
83 | codedest = hibhead.launchcode_target_page; | |
84 | codedest *= GRUB_XNU_PAGESIZE; | |
85 | codesize = hibhead.launchcode_numpages; | |
86 | codesize *= GRUB_XNU_PAGESIZE; | |
87 | ||
88 | /* FIXME: check that codedest..codedest+codesize is available. */ | |
89 | ||
90 | /* Calculate total size before pages to copy. */ | |
91 | total_header_size = hibhead.extmapsize + sizeof (hibhead); | |
92 | ||
93 | /* Unload image if any. */ | |
94 | if (grub_xnu_hibernate_image) | |
95 | grub_free (grub_xnu_hibernate_image); | |
96 | ||
b39f9d20 | 97 | /* Try to allocate necessary space. |
bbee0f2b | 98 | FIXME: mm isn't good enough yet to handle huge allocations. |
99 | */ | |
cb1b2ad7 VS |
100 | grub_xnu_relocator = grub_relocator_new (); |
101 | if (!grub_xnu_relocator) | |
bbee0f2b | 102 | { |
103 | grub_file_close (file); | |
15919498 | 104 | return grub_errno; |
bbee0f2b | 105 | } |
106 | ||
4b2ec20b VS |
107 | { |
108 | grub_relocator_chunk_t ch; | |
109 | err = grub_relocator_alloc_chunk_addr (grub_xnu_relocator, &ch, codedest, | |
110 | codesize + GRUB_XNU_PAGESIZE); | |
111 | if (err) | |
112 | { | |
113 | grub_file_close (file); | |
114 | return err; | |
115 | } | |
116 | code = get_virtual_current_address (ch); | |
117 | } | |
cb1b2ad7 | 118 | |
4b2ec20b VS |
119 | { |
120 | grub_relocator_chunk_t ch; | |
121 | err = grub_relocator_alloc_chunk_align (grub_xnu_relocator, &ch, 0, | |
122 | (0xffffffff - hibhead.image_size) + 1, | |
123 | hibhead.image_size, | |
124 | GRUB_XNU_PAGESIZE, | |
125 | GRUB_RELOCATOR_PREFERENCE_NONE); | |
126 | if (err) | |
127 | { | |
128 | grub_file_close (file); | |
129 | return err; | |
130 | } | |
131 | image = get_virtual_current_address (ch); | |
132 | target_image = get_physical_target_address (ch); | |
133 | } | |
cb1b2ad7 | 134 | |
5a0e0cc6 VS |
135 | /* Read code part. */ |
136 | if (grub_file_seek (file, total_header_size) == (grub_off_t) -1 | |
cb1b2ad7 | 137 | || grub_file_read (file, code, codesize) |
5a0e0cc6 VS |
138 | != (grub_ssize_t) codesize) |
139 | { | |
140 | grub_file_close (file); | |
7fd0baee | 141 | return grub_error (GRUB_ERR_READ_ERROR, "cannot read resume image"); |
5a0e0cc6 VS |
142 | } |
143 | ||
bbee0f2b | 144 | /* Read image. */ |
5a0e0cc6 | 145 | if (grub_file_seek (file, 0) == (grub_off_t) -1 |
cb1b2ad7 | 146 | || grub_file_read (file, image, hibhead.image_size) |
bbee0f2b | 147 | != (grub_ssize_t) hibhead.image_size) |
148 | { | |
149 | grub_file_close (file); | |
7fd0baee | 150 | return grub_error (GRUB_ERR_READ_ERROR, "cannot read resume image"); |
bbee0f2b | 151 | } |
152 | grub_file_close (file); | |
153 | ||
bbee0f2b | 154 | /* Setup variables needed by asm helper. */ |
cb1b2ad7 VS |
155 | grub_xnu_heap_target_start = codedest; |
156 | grub_xnu_heap_size = target_image + hibhead.image_size - codedest; | |
bbee0f2b | 157 | grub_xnu_stack = (codedest + hibhead.stack); |
158 | grub_xnu_entry_point = (codedest + hibhead.entry_point); | |
cb1b2ad7 | 159 | grub_xnu_arg1 = target_image; |
5a0e0cc6 VS |
160 | |
161 | grub_dprintf ("xnu", "entry point 0x%x\n", codedest + hibhead.entry_point); | |
162 | grub_dprintf ("xnu", "image at 0x%x\n", | |
163 | codedest + codesize + GRUB_XNU_PAGESIZE); | |
bbee0f2b | 164 | |
bbee0f2b | 165 | /* We're ready now. */ |
15919498 | 166 | grub_loader_set (grub_xnu_boot_resume, |
bbee0f2b | 167 | grub_xnu_resume_unload, 0); |
168 | ||
169 | /* Prevent module from unloading. */ | |
170 | grub_xnu_lock (); | |
171 | return GRUB_ERR_NONE; | |
172 | } |