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
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Bootmethod for extlinux boot from a block device
*
* Copyright 2021 Google LLC
* Written by Simon Glass <sjg@chromium.org>
*/
#define LOG_CATEGORY UCLASS_BOOTSTD
#include <common.h>
#include <bootdev.h>
#include <bootflow.h>
#include <bootmeth.h>
#include <bootstd.h>
#include <command.h>
#include <dm.h>
#include <extlinux.h>
#include <fs.h>
#include <malloc.h>
#include <mapmem.h>
#include <mmc.h>
#include <pxe_utils.h>
static int extlinux_get_state_desc(struct udevice *dev, char *buf, int maxsize)
{
if (IS_ENABLED(CONFIG_SANDBOX)) {
int len;
len = snprintf(buf, maxsize, "OK");
return len + 1 < maxsize ? 0 : -ENOSPC;
}
return 0;
}
static int extlinux_getfile(struct pxe_context *ctx, const char *file_path,
char *file_addr, ulong *sizep)
{
struct extlinux_info *info = ctx->userdata;
ulong addr;
int ret;
addr = simple_strtoul(file_addr, NULL, 16);
/* Allow up to 1GB */
*sizep = 1 << 30;
ret = bootmeth_read_file(info->dev, info->bflow, file_path, addr,
sizep);
if (ret)
return log_msg_ret("read", ret);
return 0;
}
static int extlinux_check(struct udevice *dev, struct bootflow_iter *iter)
{
int ret;
/* This only works on block devices */
ret = bootflow_iter_check_blk(iter);
if (ret)
return log_msg_ret("blk", ret);
return 0;
}
/**
* extlinux_fill_info() - Decode the extlinux file to find out its info
*
* @bflow: Bootflow to process
* @return 0 if OK, -ve on error
*/
static int extlinux_fill_info(struct bootflow *bflow)
{
struct membuff mb;
char line[200];
char *data;
int len;
log_debug("parsing bflow file size %x\n", bflow->size);
membuff_init(&mb, bflow->buf, bflow->size);
membuff_putraw(&mb, bflow->size, true, &data);
while (len = membuff_readline(&mb, line, sizeof(line) - 1, ' '), len) {
char *tok, *p = line;
tok = strsep(&p, " ");
if (p) {
if (!strcmp("label", tok)) {
bflow->os_name = strdup(p);
if (!bflow->os_name)
return log_msg_ret("os", -ENOMEM);
}
}
}
return 0;
}
static int extlinux_read_bootflow(struct udevice *dev, struct bootflow *bflow)
{
struct blk_desc *desc;
const char *const *prefixes;
struct udevice *bootstd;
const char *prefix;
loff_t size;
int ret, i;
ret = uclass_first_device_err(UCLASS_BOOTSTD, &bootstd);
if (ret)
return log_msg_ret("std", ret);
/* If a block device, we require a partition table */
if (bflow->blk && !bflow->part)
return -ENOENT;
prefixes = bootstd_get_prefixes(bootstd);
i = 0;
desc = bflow->blk ? dev_get_uclass_plat(bflow->blk) : NULL;
do {
prefix = prefixes ? prefixes[i] : NULL;
ret = bootmeth_try_file(bflow, desc, prefix, EXTLINUX_FNAME);
} while (ret && prefixes && prefixes[++i]);
if (ret)
return log_msg_ret("try", ret);
size = bflow->size;
ret = bootmeth_alloc_file(bflow, 0x10000, 1);
if (ret)
return log_msg_ret("read", ret);
ret = extlinux_fill_info(bflow);
if (ret)
return log_msg_ret("inf", ret);
return 0;
}
static int extlinux_boot(struct udevice *dev, struct bootflow *bflow)
{
struct cmd_tbl cmdtp = {}; /* dummy */
struct pxe_context ctx;
struct extlinux_info info;
ulong addr;
int ret;
addr = map_to_sysmem(bflow->buf);
info.dev = dev;
info.bflow = bflow;
ret = pxe_setup_ctx(&ctx, &cmdtp, extlinux_getfile, &info, true,
bflow->subdir, false);
if (ret)
return log_msg_ret("ctx", -EINVAL);
ret = pxe_process(&ctx, addr, false);
if (ret)
return log_msg_ret("bread", -EINVAL);
return 0;
}
static int extlinux_bootmeth_bind(struct udevice *dev)
{
struct bootmeth_uc_plat *plat = dev_get_uclass_plat(dev);
plat->desc = IS_ENABLED(CONFIG_BOOTSTD_FULL) ?
"Extlinux boot from a block device" : "extlinux";
return 0;
}
static struct bootmeth_ops extlinux_bootmeth_ops = {
.get_state_desc = extlinux_get_state_desc,
.check = extlinux_check,
.read_bootflow = extlinux_read_bootflow,
.read_file = bootmeth_common_read_file,
.boot = extlinux_boot,
};
static const struct udevice_id extlinux_bootmeth_ids[] = {
{ .compatible = "u-boot,extlinux" },
{ }
};
U_BOOT_DRIVER(bootmeth_extlinux) = {
.name = "bootmeth_extlinux",
.id = UCLASS_BOOTMETH,
.of_match = extlinux_bootmeth_ids,
.ops = &extlinux_bootmeth_ops,
.bind = extlinux_bootmeth_bind,
};
|
