1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
/* init.c - generic U-Boot initialization and finalization */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2013 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/env.h>
#include <grub/kernel.h>
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/offsets.h>
#include <grub/term.h>
#include <grub/time.h>
#include <grub/machine/kernel.h>
#include <grub/uboot/console.h>
#include <grub/uboot/disk.h>
#include <grub/uboot/uboot.h>
#include <grub/uboot/api_public.h>
#include <grub/cpu/system.h>
#include <grub/cache.h>
extern char __bss_start[];
extern char _end[];
extern grub_size_t grub_total_module_size;
static unsigned long timer_start;
void
grub_exit (void)
{
grub_uboot_return (0);
}
static grub_uint64_t
uboot_timer_ms (void)
{
static grub_uint32_t last = 0, high = 0;
grub_uint32_t cur = grub_uboot_get_timer (timer_start);
if (cur < last)
high++;
last = cur;
return (((grub_uint64_t) high) << 32) | cur;
}
#ifdef __arm__
static grub_uint64_t
rpi_timer_ms (void)
{
static grub_uint32_t last = 0, high = 0;
grub_uint32_t cur = *(volatile grub_uint32_t *) 0x20003004;
if (cur < last)
high++;
last = cur;
return grub_divmod64 ((((grub_uint64_t) high) << 32) | cur, 1000, 0);
}
#endif
void
grub_machine_init (void)
{
int ver;
/* First of all - establish connection with U-Boot */
ver = grub_uboot_api_init ();
if (!ver)
{
/* Don't even have a console to log errors to... */
grub_exit ();
}
else if (ver > API_SIG_VERSION)
{
/* Try to print an error message */
grub_uboot_puts ("invalid U-Boot API version\n");
}
/* Initialize the console so that GRUB can display messages. */
grub_console_init_early ();
/* Enumerate memory and initialize the memory management system. */
grub_uboot_mm_init ();
/* Should be earlier but it needs memalign. */
#ifdef __arm__
grub_arm_enable_caches_mmu ();
#endif
grub_dprintf ("init", "__bss_start: %p\n", __bss_start);
grub_dprintf ("init", "_end: %p\n", _end);
grub_dprintf ("init", "grub_modbase: %p\n", (void *) grub_modbase);
grub_dprintf ("init", "grub_modules_get_end(): %p\n",
(void *) grub_modules_get_end ());
/* Initialise full terminfo support */
grub_console_init_lately ();
/* Enumerate uboot devices */
grub_uboot_probe_hardware ();
/* Initialise timer */
#ifdef __arm__
if (grub_uboot_get_machine_type () == GRUB_ARM_MACHINE_TYPE_RASPBERRY_PI)
{
grub_install_get_time_ms (rpi_timer_ms);
}
else
#endif
{
timer_start = grub_uboot_get_timer (0);
grub_install_get_time_ms (uboot_timer_ms);
}
/* Initialize */
grub_ubootdisk_init ();
}
void
grub_machine_fini (int flags __attribute__ ((unused)))
{
}
/*
* grub_machine_get_bootlocation():
* Called from kern/main.c, which expects a device name (minus parentheses)
* and a filesystem path back, if any are known.
* Any returned values must be pointers to dynamically allocated strings.
*/
void
grub_machine_get_bootlocation (char **device, char **path)
{
char *tmp;
tmp = grub_uboot_env_get ("grub_bootdev");
if (tmp)
{
*device = grub_strdup (tmp);
if (*device == NULL)
return;
}
else
*device = NULL;
tmp = grub_uboot_env_get ("grub_bootpath");
if (tmp)
{
*path = grub_strdup (tmp);
if (*path == NULL)
return;
}
else
*path = NULL;
}
void
grub_uboot_fini (void)
{
grub_ubootdisk_fini ();
grub_console_fini ();
}
|
