jcs.org
"Das U-Boot" Source Tree
1// SPDX-License-Identifier: GPL-2.0+
2
3#include <command.h>
4#include <env.h>
5#include <fs.h>
6#include <pxe_utils.h>
7#include <vsprintf.h>
8
9/**
10 * struct sysboot_info - useful information for sysboot helpers
11 *
12 * @fstype: Filesystem type (FS_TYPE_...)
13 * @ifname: Interface name (e.g. "ide", "scsi")
14 * @dev_part_str is in the format:
15 * <dev>.<hw_part>:<part> where <dev> is the device number,
16 * <hw_part> is the optional hardware partition number and
17 * <part> is the partition number
18 */
19struct sysboot_info {
20 int fstype;
21 const char *ifname;
22 const char *dev_part_str;
23};
24
25static int sysboot_read_file(struct pxe_context *ctx, const char *file_path,
26 char *file_addr, enum bootflow_img_t type,
27 ulong *sizep)
28{
29 struct sysboot_info *info = ctx->userdata;
30 loff_t len_read;
31 ulong addr;
32 int ret;
33
34 addr = simple_strtoul(file_addr, NULL, 16);
35 ret = fs_set_blk_dev(info->ifname, info->dev_part_str, info->fstype);
36 if (ret)
37 return ret;
38 ret = fs_read(file_path, addr, 0, 0, &len_read);
39 if (ret)
40 return ret;
41 *sizep = len_read;
42
43 return 0;
44}
45
46/*
47 * Boots a system using a local disk syslinux/extlinux file
48 *
49 * Returns 0 on success, 1 on error.
50 */
51static int do_sysboot(struct cmd_tbl *cmdtp, int flag, int argc,
52 char *const argv[])
53{
54 unsigned long pxefile_addr_r;
55 struct pxe_context ctx;
56 char *pxefile_addr_str;
57 struct sysboot_info info;
58 char *filename;
59 int prompt = 0;
60 int ret;
61
62 if (argc > 1 && strstr(argv[1], "-p")) {
63 prompt = 1;
64 argc--;
65 argv++;
66 }
67
68 if (argc < 4)
69 return cmd_usage(cmdtp);
70
71 if (argc < 5) {
72 pxefile_addr_str = from_env("pxefile_addr_r");
73 if (!pxefile_addr_str)
74 return 1;
75 } else {
76 pxefile_addr_str = argv[4];
77 }
78
79 if (argc < 6) {
80 filename = env_get("bootfile");
81 if (!filename) {
82 printf("Specify a filename or set the ${bootfile} environment variable\n");
83 return 1;
84 }
85 } else {
86 filename = argv[5];
87 env_set("bootfile", filename);
88 }
89
90 if (strstr(argv[3], "ext2")) {
91 info.fstype = FS_TYPE_EXT;
92 } else if (strstr(argv[3], "fat")) {
93 info.fstype = FS_TYPE_FAT;
94 } else if (strstr(argv[3], "any")) {
95 info.fstype = FS_TYPE_ANY;
96 } else {
97 printf("Invalid filesystem: %s\n", argv[3]);
98 return 1;
99 }
100 info.ifname = argv[1];
101 info.dev_part_str = argv[2];
102
103 if (strict_strtoul(pxefile_addr_str, 16, &pxefile_addr_r) < 0) {
104 printf("Invalid pxefile address: %s\n", pxefile_addr_str);
105 return 1;
106 }
107
108 if (pxe_setup_ctx(&ctx, cmdtp, sysboot_read_file, &info, true,
109 filename, false, false)) {
110 printf("Out of memory\n");
111 return CMD_RET_FAILURE;
112 }
113
114 if (get_pxe_file(&ctx, filename, pxefile_addr_r)
115 < 0) {
116 printf("Error reading config file\n");
117 pxe_destroy_ctx(&ctx);
118 return 1;
119 }
120
121 ret = pxe_process(&ctx, pxefile_addr_r, prompt);
122 pxe_destroy_ctx(&ctx);
123 if (ret)
124 return CMD_RET_FAILURE;
125
126 return 0;
127}
128
129U_BOOT_CMD(sysboot, 7, 1, do_sysboot,
130 "command to get and boot from syslinux files",
131 "[-p] <interface> <dev[:part]> <ext2|fat|any> [addr] [filename]\n"
132 " - load and parse syslinux menu file 'filename' from ext2, fat\n"
133 " or any filesystem on 'dev' on 'interface' to address 'addr'"
134);