1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2010-2011 Calxeda, Inc.
4 * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
12 #include "pxe_utils.h"
15 const char *pxe_default_paths[] = {
17 #ifdef CONFIG_SYS_BOARD
18 "default-" CONFIG_SYS_ARCH "-" CONFIG_SYS_SOC "-" CONFIG_SYS_BOARD,
20 "default-" CONFIG_SYS_ARCH "-" CONFIG_SYS_SOC,
22 "default-" CONFIG_SYS_ARCH,
27 static int do_get_tftp(struct pxe_context *ctx, const char *file_path,
30 char *tftp_argv[] = {"tftp", NULL, NULL, NULL};
32 tftp_argv[1] = file_addr;
33 tftp_argv[2] = (void *)file_path;
35 if (do_tftpb(ctx->cmdtp, 0, 3, tftp_argv))
42 * Looks for a pxe file with a name based on the pxeuuid environment variable.
44 * Returns 1 on success or < 0 on error.
46 static int pxe_uuid_path(struct pxe_context *ctx, unsigned long pxefile_addr_r)
50 uuid_str = from_env("pxeuuid");
55 return get_pxelinux_path(ctx, uuid_str, pxefile_addr_r);
59 * Looks for a pxe file with a name based on the 'ethaddr' environment
62 * Returns 1 on success or < 0 on error.
64 static int pxe_mac_path(struct pxe_context *ctx, unsigned long pxefile_addr_r)
69 err = format_mac_pxe(mac_str, sizeof(mac_str));
74 return get_pxelinux_path(ctx, mac_str, pxefile_addr_r);
78 * Looks for pxe files with names based on our IP address. See pxelinux
79 * documentation for details on what these file names look like. We match
82 * Returns 1 on success or < 0 on error.
84 static int pxe_ipaddr_paths(struct pxe_context *ctx, unsigned long pxefile_addr_r)
89 sprintf(ip_addr, "%08X", ntohl(net_ip.s_addr));
91 for (mask_pos = 7; mask_pos >= 0; mask_pos--) {
92 err = get_pxelinux_path(ctx, ip_addr, pxefile_addr_r);
97 ip_addr[mask_pos] = '\0';
103 * Entry point for the 'pxe get' command.
104 * This Follows pxelinux's rules to download a config file from a tftp server.
105 * The file is stored at the location given by the pxefile_addr_r environment
106 * variable, which must be set.
108 * UUID comes from pxeuuid env variable, if defined
109 * MAC addr comes from ethaddr env variable, if defined
112 * see http://syslinux.zytor.com/wiki/index.php/PXELINUX
114 * Returns 0 on success or 1 on error.
117 do_pxe_get(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
119 char *pxefile_addr_str;
120 unsigned long pxefile_addr_r;
121 struct pxe_context ctx;
125 return CMD_RET_USAGE;
127 pxefile_addr_str = from_env("pxefile_addr_r");
129 if (!pxefile_addr_str)
132 err = strict_strtoul(pxefile_addr_str, 16,
133 (unsigned long *)&pxefile_addr_r);
137 if (pxe_setup_ctx(&ctx, cmdtp, do_get_tftp, NULL, false,
138 env_get("bootfile"))) {
139 printf("Out of memory\n");
140 return CMD_RET_FAILURE;
143 * Keep trying paths until we successfully get a file we're looking
146 if (pxe_uuid_path(&ctx, pxefile_addr_r) > 0 ||
147 pxe_mac_path(&ctx, pxefile_addr_r) > 0 ||
148 pxe_ipaddr_paths(&ctx, pxefile_addr_r) > 0) {
149 printf("Config file found\n");
150 pxe_destroy_ctx(&ctx);
155 while (pxe_default_paths[i]) {
156 if (get_pxelinux_path(&ctx, pxe_default_paths[i],
157 pxefile_addr_r) > 0) {
158 printf("Config file found\n");
159 pxe_destroy_ctx(&ctx);
165 printf("Config file not found\n");
166 pxe_destroy_ctx(&ctx);
172 * Boots a system using a pxe file
174 * Returns 0 on success, 1 on error.
177 do_pxe_boot(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
179 unsigned long pxefile_addr_r;
180 char *pxefile_addr_str;
181 struct pxe_context ctx;
185 pxefile_addr_str = from_env("pxefile_addr_r");
186 if (!pxefile_addr_str)
189 } else if (argc == 2) {
190 pxefile_addr_str = argv[1];
192 return CMD_RET_USAGE;
195 if (strict_strtoul(pxefile_addr_str, 16, &pxefile_addr_r) < 0) {
196 printf("Invalid pxefile address: %s\n", pxefile_addr_str);
200 if (pxe_setup_ctx(&ctx, cmdtp, do_get_tftp, NULL, false,
201 env_get("bootfile"))) {
202 printf("Out of memory\n");
203 return CMD_RET_FAILURE;
205 ret = pxe_process(&ctx, pxefile_addr_r, false);
206 pxe_destroy_ctx(&ctx);
208 return CMD_RET_FAILURE;
210 copy_filename(net_boot_file_name, "", sizeof(net_boot_file_name));
215 static struct cmd_tbl cmd_pxe_sub[] = {
216 U_BOOT_CMD_MKENT(get, 1, 1, do_pxe_get, "", ""),
217 U_BOOT_CMD_MKENT(boot, 2, 1, do_pxe_boot, "", "")
220 static void __maybe_unused pxe_reloc(void)
222 static int relocated_pxe;
224 if (!relocated_pxe) {
225 fixup_cmdtable(cmd_pxe_sub, ARRAY_SIZE(cmd_pxe_sub));
230 static int do_pxe(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
234 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
239 return CMD_RET_USAGE;
241 /* drop initial "pxe" arg */
245 cp = find_cmd_tbl(argv[0], cmd_pxe_sub, ARRAY_SIZE(cmd_pxe_sub));
248 return cp->cmd(cmdtp, flag, argc, argv);
250 return CMD_RET_USAGE;
253 U_BOOT_CMD(pxe, 3, 1, do_pxe,
254 "commands to get and boot from pxe files",
255 "get - try to retrieve a pxe file using tftp\n"
256 "pxe boot [pxefile_addr_r] - boot from the pxe file at pxefile_addr_r\n"