2
* GRUB -- GRand Unified Bootloader
3
* Copyright (C) 2009 Free Software Foundation, Inc.
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.
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.
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/>.
19
/* This is an emulation of EFI runtime services.
20
This allows a more uniform boot on i386 machines.
21
As it emulates only runtime service it isn't able
22
to chainload EFI bootloader on non-EFI system. */
25
#include <grub/file.h>
27
#include <grub/normal.h>
30
#include <grub/misc.h>
31
#include <grub/efiemu/efiemu.h>
32
#include <grub/command.h>
33
#include <grub/i18n.h>
35
/* System table. Two version depending on mode */
36
grub_efi_system_table32_t *grub_efiemu_system_table32 = 0;
37
grub_efi_system_table64_t *grub_efiemu_system_table64 = 0;
38
/* Modules may need to execute some actions after memory allocation happens */
39
static struct grub_efiemu_prepare_hook *efiemu_prepare_hooks = 0;
40
/* Linked list of configuration tables */
41
static struct grub_efiemu_configuration_table *efiemu_config_tables = 0;
42
static int prepared = 0;
44
/* Free all allocated space */
46
grub_efiemu_unload (void)
48
struct grub_efiemu_configuration_table *cur, *d;
49
struct grub_efiemu_prepare_hook *curhook, *d2;
50
grub_efiemu_loadcore_unload ();
52
grub_efiemu_mm_unload ();
54
for (cur = efiemu_config_tables; cur;)
58
cur->unload (cur->data);
62
efiemu_config_tables = 0;
64
for (curhook = efiemu_prepare_hooks; curhook;)
68
curhook->unload (curhook->data);
72
efiemu_prepare_hooks = 0;
79
/* Remove previously registered table from the list */
81
grub_efiemu_unregister_configuration_table (grub_efi_guid_t guid)
83
struct grub_efiemu_configuration_table *cur, *prev;
85
/* Special treating if head is to remove */
86
while (efiemu_config_tables
87
&& !grub_memcmp (&(efiemu_config_tables->guid), &guid, sizeof (guid)))
89
if (efiemu_config_tables->unload)
90
efiemu_config_tables->unload (efiemu_config_tables->data);
91
cur = efiemu_config_tables->next;
92
grub_free (efiemu_config_tables);
93
efiemu_config_tables = cur;
95
if (!efiemu_config_tables)
98
/* Remove from chain */
99
for (prev = efiemu_config_tables, cur = prev->next; cur;)
100
if (grub_memcmp (&(cur->guid), &guid, sizeof (guid)) == 0)
103
cur->unload (cur->data);
104
prev->next = cur->next;
113
return GRUB_ERR_NONE;
117
grub_efiemu_register_prepare_hook (grub_err_t (*hook) (void *data),
118
void (*unload) (void *data),
121
struct grub_efiemu_prepare_hook *nhook;
123
return grub_error (GRUB_ERR_BAD_ARGUMENT, "you must supply the hook");
124
nhook = (struct grub_efiemu_prepare_hook *) grub_malloc (sizeof (*nhook));
126
return grub_error (GRUB_ERR_OUT_OF_MEMORY, "couldn't prepare hook");
128
nhook->unload = unload;
130
nhook->next = efiemu_prepare_hooks;
131
efiemu_prepare_hooks = nhook;
132
return GRUB_ERR_NONE;
135
/* Register a configuration table either supplying the address directly
139
grub_efiemu_register_configuration_table (grub_efi_guid_t guid,
140
void * (*get_table) (void *data),
141
void (*unload) (void *data),
144
struct grub_efiemu_configuration_table *tbl;
147
if (! get_table && ! data)
148
return grub_error (GRUB_ERR_BAD_ARGUMENT,
149
"you must set at least get_table or data");
150
if ((err = grub_efiemu_unregister_configuration_table (guid)))
153
tbl = (struct grub_efiemu_configuration_table *) grub_malloc (sizeof (*tbl));
155
return grub_error (GRUB_ERR_OUT_OF_MEMORY, "couldn't register table");
158
tbl->get_table = get_table;
159
tbl->unload = unload;
161
tbl->next = efiemu_config_tables;
162
efiemu_config_tables = tbl;
164
return GRUB_ERR_NONE;
168
grub_cmd_efiemu_unload (grub_command_t cmd __attribute__ ((unused)),
169
int argc __attribute__ ((unused)),
170
char *args[] __attribute__ ((unused)))
172
return grub_efiemu_unload ();
176
grub_cmd_efiemu_prepare (grub_command_t cmd __attribute__ ((unused)),
177
int argc __attribute__ ((unused)),
178
char *args[] __attribute__ ((unused)))
180
return grub_efiemu_prepare ();
185
/* Load the runtime from the file FILENAME. */
187
grub_efiemu_load_file (const char *filename)
192
file = grub_file_open (filename);
196
err = grub_efiemu_mm_init ();
199
grub_file_close (file);
200
grub_efiemu_unload ();
201
return grub_error (grub_errno, "couldn't init memory management");
204
grub_dprintf ("efiemu", "mm initialized\n");
206
err = grub_efiemu_loadcore_init (file);
209
grub_file_close (file);
210
grub_efiemu_unload ();
214
grub_file_close (file);
216
/* For configuration tables entry in system table. */
217
grub_efiemu_request_symbols (1);
219
return GRUB_ERR_NONE;
223
grub_efiemu_autocore (void)
230
if (grub_efiemu_sizeof_uintn_t () != 0)
231
return GRUB_ERR_NONE;
233
prefix = grub_env_get ("prefix");
236
return grub_error (GRUB_ERR_FILE_NOT_FOUND,
237
"couldn't find efiemu core because prefix "
240
suffix = grub_efiemu_get_default_core_name ();
242
filename = grub_xasprintf ("%s/%s", prefix, suffix);
244
return grub_error (GRUB_ERR_OUT_OF_MEMORY,
245
"couldn't allocate temporary space");
248
err = grub_efiemu_load_file (filename);
249
grub_free (filename);
252
#ifndef GRUB_MACHINE_EMU
253
err = grub_machine_efiemu_init_tables ();
258
return GRUB_ERR_NONE;
262
grub_efiemu_prepare (void)
267
return GRUB_ERR_NONE;
269
err = grub_efiemu_autocore ();
273
grub_dprintf ("efiemu", "Preparing %d-bit efiemu\n",
274
8 * grub_efiemu_sizeof_uintn_t ());
277
grub_efiemu_pnvram ();
281
if (grub_efiemu_sizeof_uintn_t () == 4)
282
return grub_efiemu_prepare32 (efiemu_prepare_hooks, efiemu_config_tables);
284
return grub_efiemu_prepare64 (efiemu_prepare_hooks, efiemu_config_tables);
289
grub_cmd_efiemu_load (grub_command_t cmd __attribute__ ((unused)),
290
int argc, char *args[])
294
grub_efiemu_unload ();
297
return grub_error (GRUB_ERR_BAD_ARGUMENT, "filename required");
299
err = grub_efiemu_load_file (args[0]);
302
#ifndef GRUB_MACHINE_EMU
303
err = grub_machine_efiemu_init_tables ();
307
return GRUB_ERR_NONE;
310
static grub_command_t cmd_loadcore, cmd_prepare, cmd_unload;
312
GRUB_MOD_INIT(efiemu)
314
cmd_loadcore = grub_register_command ("efiemu_loadcore",
315
grub_cmd_efiemu_load,
317
N_("Load and initialize EFI emulator."));
318
cmd_prepare = grub_register_command ("efiemu_prepare",
319
grub_cmd_efiemu_prepare,
321
N_("Finalize loading of EFI emulator."));
322
cmd_unload = grub_register_command ("efiemu_unload", grub_cmd_efiemu_unload,
324
N_("Unload EFI emulator."));
327
GRUB_MOD_FINI(efiemu)
329
grub_unregister_command (cmd_loadcore);
330
grub_unregister_command (cmd_prepare);
331
grub_unregister_command (cmd_unload);