1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2010-2011 Calxeda, Inc.
4 * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
13 #include <linux/string.h>
14 #include <linux/ctype.h>
16 #include <linux/list.h>
24 #include "pxe_utils.h"
26 #define MAX_TFTP_PATH_LEN 512
31 * Convert an ethaddr from the environment to the format used by pxelinux
32 * filenames based on mac addresses. Convert's ':' to '-', and adds "01-" to
33 * the beginning of the ethernet address to indicate a hardware type of
34 * Ethernet. Also converts uppercase hex characters into lowercase, to match
35 * pxelinux's behavior.
37 * Returns 1 for success, -ENOENT if 'ethaddr' is undefined in the
38 * environment, or some other value < 0 on error.
40 int format_mac_pxe(char *outbuf, size_t outbuf_len)
44 if (outbuf_len < 21) {
45 printf("outbuf is too small (%zd < 21)\n", outbuf_len);
50 if (!eth_env_get_enetaddr_by_index("eth", eth_get_dev_index(), ethaddr))
53 sprintf(outbuf, "01-%02x-%02x-%02x-%02x-%02x-%02x",
54 ethaddr[0], ethaddr[1], ethaddr[2],
55 ethaddr[3], ethaddr[4], ethaddr[5]);
61 * Returns the directory the file specified in the bootfile env variable is
62 * in. If bootfile isn't defined in the environment, return NULL, which should
63 * be interpreted as "don't prepend anything to paths".
65 static int get_bootfile_path(const char *file_path, char *bootfile_path,
66 size_t bootfile_path_size)
68 char *bootfile, *last_slash;
71 /* Only syslinux allows absolute paths */
72 if (file_path[0] == '/' && !is_pxe)
75 bootfile = from_env("bootfile");
80 last_slash = strrchr(bootfile, '/');
85 path_len = (last_slash - bootfile) + 1;
87 if (bootfile_path_size < path_len) {
88 printf("bootfile_path too small. (%zd < %zd)\n",
89 bootfile_path_size, path_len);
94 strncpy(bootfile_path, bootfile, path_len);
97 bootfile_path[path_len] = '\0';
102 int (*do_getfile)(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr);
105 * As in pxelinux, paths to files referenced from files we retrieve are
106 * relative to the location of bootfile. get_relfile takes such a path and
107 * joins it with the bootfile path to get the full path to the target file. If
108 * the bootfile path is NULL, we use file_path as is.
110 * Returns 1 for success, or < 0 on error.
112 static int get_relfile(cmd_tbl_t *cmdtp, const char *file_path,
113 unsigned long file_addr)
116 char relfile[MAX_TFTP_PATH_LEN + 1];
120 err = get_bootfile_path(file_path, relfile, sizeof(relfile));
125 path_len = strlen(file_path);
126 path_len += strlen(relfile);
128 if (path_len > MAX_TFTP_PATH_LEN) {
129 printf("Base path too long (%s%s)\n", relfile, file_path);
131 return -ENAMETOOLONG;
134 strcat(relfile, file_path);
136 printf("Retrieving file: %s\n", relfile);
138 sprintf(addr_buf, "%lx", file_addr);
140 return do_getfile(cmdtp, relfile, addr_buf);
144 * Retrieve the file at 'file_path' to the locate given by 'file_addr'. If
145 * 'bootfile' was specified in the environment, the path to bootfile will be
146 * prepended to 'file_path' and the resulting path will be used.
148 * Returns 1 on success, or < 0 for error.
150 int get_pxe_file(cmd_tbl_t *cmdtp, const char *file_path,
151 unsigned long file_addr)
153 unsigned long config_file_size;
158 err = get_relfile(cmdtp, file_path, file_addr);
164 * the file comes without a NUL byte at the end, so find out its size
165 * and add the NUL byte.
167 tftp_filesize = from_env("filesize");
172 if (strict_strtoul(tftp_filesize, 16, &config_file_size) < 0)
175 buf = map_sysmem(file_addr + config_file_size, 1);
182 #define PXELINUX_DIR "pxelinux.cfg/"
185 * Retrieves a file in the 'pxelinux.cfg' folder. Since this uses get_pxe_file
186 * to do the hard work, the location of the 'pxelinux.cfg' folder is generated
187 * from the bootfile path, as described above.
189 * Returns 1 on success or < 0 on error.
191 int get_pxelinux_path(cmd_tbl_t *cmdtp, const char *file,
192 unsigned long pxefile_addr_r)
194 size_t base_len = strlen(PXELINUX_DIR);
195 char path[MAX_TFTP_PATH_LEN + 1];
197 if (base_len + strlen(file) > MAX_TFTP_PATH_LEN) {
198 printf("path (%s%s) too long, skipping\n",
200 return -ENAMETOOLONG;
203 sprintf(path, PXELINUX_DIR "%s", file);
205 return get_pxe_file(cmdtp, path, pxefile_addr_r);
209 * Wrapper to make it easier to store the file at file_path in the location
210 * specified by envaddr_name. file_path will be joined to the bootfile path,
211 * if any is specified.
213 * Returns 1 on success or < 0 on error.
215 static int get_relfile_envaddr(cmd_tbl_t *cmdtp, const char *file_path,
216 const char *envaddr_name)
218 unsigned long file_addr;
221 envaddr = from_env(envaddr_name);
226 if (strict_strtoul(envaddr, 16, &file_addr) < 0)
229 return get_relfile(cmdtp, file_path, file_addr);
233 * Allocates memory for and initializes a pxe_label. This uses malloc, so the
234 * result must be free()'d to reclaim the memory.
236 * Returns NULL if malloc fails.
238 static struct pxe_label *label_create(void)
240 struct pxe_label *label;
242 label = malloc(sizeof(struct pxe_label));
247 memset(label, 0, sizeof(struct pxe_label));
253 * Free the memory used by a pxe_label, including that used by its name,
254 * kernel, append and initrd members, if they're non NULL.
256 * So - be sure to only use dynamically allocated memory for the members of
257 * the pxe_label struct, unless you want to clean it up first. These are
258 * currently only created by the pxe file parsing code.
260 static void label_destroy(struct pxe_label *label)
287 * Print a label and its string members if they're defined.
289 * This is passed as a callback to the menu code for displaying each
292 static void label_print(void *data)
294 struct pxe_label *label = data;
295 const char *c = label->menu ? label->menu : label->name;
297 printf("%s:\t%s\n", label->num, c);
301 * Boot a label that specified 'localboot'. This requires that the 'localcmd'
302 * environment variable is defined. Its contents will be executed as U-Boot
303 * command. If the label specified an 'append' line, its contents will be
304 * used to overwrite the contents of the 'bootargs' environment variable prior
305 * to running 'localcmd'.
307 * Returns 1 on success or < 0 on error.
309 static int label_localboot(struct pxe_label *label)
313 localcmd = from_env("localcmd");
319 char bootargs[CONFIG_SYS_CBSIZE];
321 cli_simple_process_macros(label->append, bootargs);
322 env_set("bootargs", bootargs);
325 debug("running: %s\n", localcmd);
327 return run_command_list(localcmd, strlen(localcmd), 0);
331 * Boot according to the contents of a pxe_label.
333 * If we can't boot for any reason, we return. A successful boot never
336 * The kernel will be stored in the location given by the 'kernel_addr_r'
337 * environment variable.
339 * If the label specifies an initrd file, it will be stored in the location
340 * given by the 'ramdisk_addr_r' environment variable.
342 * If the label specifies an 'append' line, its contents will overwrite that
343 * of the 'bootargs' environment variable.
345 static int label_boot(cmd_tbl_t *cmdtp, struct pxe_label *label)
347 char *bootm_argv[] = { "bootm", NULL, NULL, NULL, NULL };
349 char mac_str[29] = "";
350 char ip_str[68] = "";
351 char *fit_addr = NULL;
359 label->attempted = 1;
361 if (label->localboot) {
362 if (label->localboot_val >= 0)
363 label_localboot(label);
367 if (!label->kernel) {
368 printf("No kernel given, skipping %s\n",
374 if (get_relfile_envaddr(cmdtp, label->initrd, "ramdisk_addr_r") < 0) {
375 printf("Skipping %s for failure retrieving initrd\n",
380 bootm_argv[2] = initrd_str;
381 strncpy(bootm_argv[2], env_get("ramdisk_addr_r"), 18);
382 strcat(bootm_argv[2], ":");
383 strncat(bootm_argv[2], env_get("filesize"), 9);
387 if (get_relfile_envaddr(cmdtp, label->kernel, "kernel_addr_r") < 0) {
388 printf("Skipping %s for failure retrieving kernel\n",
393 if (label->ipappend & 0x1) {
394 sprintf(ip_str, " ip=%s:%s:%s:%s",
395 env_get("ipaddr"), env_get("serverip"),
396 env_get("gatewayip"), env_get("netmask"));
399 #ifdef CONFIG_CMD_NET
400 if (label->ipappend & 0x2) {
403 strcpy(mac_str, " BOOTIF=");
404 err = format_mac_pxe(mac_str + 8, sizeof(mac_str) - 8);
410 if ((label->ipappend & 0x3) || label->append) {
411 char bootargs[CONFIG_SYS_CBSIZE] = "";
412 char finalbootargs[CONFIG_SYS_CBSIZE];
414 if (strlen(label->append ?: "") +
415 strlen(ip_str) + strlen(mac_str) + 1 > sizeof(bootargs)) {
416 printf("bootarg overflow %zd+%zd+%zd+1 > %zd\n",
417 strlen(label->append ?: ""),
418 strlen(ip_str), strlen(mac_str),
424 strncpy(bootargs, label->append, sizeof(bootargs));
426 strcat(bootargs, ip_str);
427 strcat(bootargs, mac_str);
429 cli_simple_process_macros(bootargs, finalbootargs);
430 env_set("bootargs", finalbootargs);
431 printf("append: %s\n", finalbootargs);
434 bootm_argv[1] = env_get("kernel_addr_r");
435 /* for FIT, append the configuration identifier */
437 int len = strlen(bootm_argv[1]) + strlen(label->config) + 1;
439 fit_addr = malloc(len);
441 printf("malloc fail (FIT address)\n");
444 snprintf(fit_addr, len, "%s%s", bootm_argv[1], label->config);
445 bootm_argv[1] = fit_addr;
449 * fdt usage is optional:
450 * It handles the following scenarios. All scenarios are exclusive
452 * Scenario 1: If fdt_addr_r specified and "fdt" label is defined in
453 * pxe file, retrieve fdt blob from server. Pass fdt_addr_r to bootm,
454 * and adjust argc appropriately.
456 * Scenario 2: If there is an fdt_addr specified, pass it along to
457 * bootm, and adjust argc appropriately.
459 * Scenario 3: fdt blob is not available.
461 bootm_argv[3] = env_get("fdt_addr_r");
463 /* if fdt label is defined then get fdt from server */
465 char *fdtfile = NULL;
466 char *fdtfilefree = NULL;
469 fdtfile = label->fdt;
470 } else if (label->fdtdir) {
471 char *f1, *f2, *f3, *f4, *slash;
473 f1 = env_get("fdtfile");
480 * For complex cases where this code doesn't
481 * generate the correct filename, the board
482 * code should set $fdtfile during early boot,
483 * or the boot scripts should set $fdtfile
484 * before invoking "pxe" or "sysboot".
488 f3 = env_get("board");
492 len = strlen(label->fdtdir);
495 else if (label->fdtdir[len - 1] != '/')
500 len = strlen(label->fdtdir) + strlen(slash) +
501 strlen(f1) + strlen(f2) + strlen(f3) +
503 fdtfilefree = malloc(len);
505 printf("malloc fail (FDT filename)\n");
509 snprintf(fdtfilefree, len, "%s%s%s%s%s%s",
510 label->fdtdir, slash, f1, f2, f3, f4);
511 fdtfile = fdtfilefree;
515 int err = get_relfile_envaddr(cmdtp, fdtfile,
520 printf("Skipping %s for failure retrieving fdt\n",
525 bootm_argv[3] = NULL;
530 bootm_argv[3] = env_get("fdt_addr");
538 kernel_addr = genimg_get_kernel_addr(bootm_argv[1]);
539 buf = map_sysmem(kernel_addr, 0);
540 /* Try bootm for legacy and FIT format image */
541 if (genimg_get_format(buf) != IMAGE_FORMAT_INVALID)
542 do_bootm(cmdtp, 0, bootm_argc, bootm_argv);
543 #ifdef CONFIG_CMD_BOOTI
544 /* Try booting an AArch64 Linux kernel image */
546 do_booti(cmdtp, 0, bootm_argc, bootm_argv);
547 #elif defined(CONFIG_CMD_BOOTZ)
548 /* Try booting a Image */
550 do_bootz(cmdtp, 0, bootm_argc, bootm_argv);
561 * Tokens for the pxe file parser.
588 * A token - given by a value and a type.
592 enum token_type type;
596 * Keywords recognized.
598 static const struct token keywords[] = {
601 {"timeout", T_TIMEOUT},
602 {"default", T_DEFAULT},
603 {"prompt", T_PROMPT},
605 {"kernel", T_KERNEL},
607 {"localboot", T_LOCALBOOT},
608 {"append", T_APPEND},
609 {"initrd", T_INITRD},
610 {"include", T_INCLUDE},
611 {"devicetree", T_FDT},
613 {"devicetreedir", T_FDTDIR},
614 {"fdtdir", T_FDTDIR},
615 {"ontimeout", T_ONTIMEOUT,},
616 {"ipappend", T_IPAPPEND,},
617 {"background", T_BACKGROUND,},
622 * Since pxe(linux) files don't have a token to identify the start of a
623 * literal, we have to keep track of when we're in a state where a literal is
624 * expected vs when we're in a state a keyword is expected.
633 * get_string retrieves a string from *p and stores it as a token in
636 * get_string used for scanning both string literals and keywords.
638 * Characters from *p are copied into t-val until a character equal to
639 * delim is found, or a NUL byte is reached. If delim has the special value of
640 * ' ', any whitespace character will be used as a delimiter.
642 * If lower is unequal to 0, uppercase characters will be converted to
643 * lowercase in the result. This is useful to make keywords case
646 * The location of *p is updated to point to the first character after the end
647 * of the token - the ending delimiter.
649 * On success, the new value of t->val is returned. Memory for t->val is
650 * allocated using malloc and must be free()'d to reclaim it. If insufficient
651 * memory is available, NULL is returned.
653 static char *get_string(char **p, struct token *t, char delim, int lower)
659 * b and e both start at the beginning of the input stream.
661 * e is incremented until we find the ending delimiter, or a NUL byte
662 * is reached. Then, we take e - b to find the length of the token.
668 if ((delim == ' ' && isspace(*e)) || delim == *e)
676 * Allocate memory to hold the string, and copy it in, converting
677 * characters to lowercase if lower is != 0.
679 t->val = malloc(len + 1);
683 for (i = 0; i < len; i++, b++) {
685 t->val[i] = tolower(*b);
693 * Update *p so the caller knows where to continue scanning.
703 * Populate a keyword token with a type and value.
705 static void get_keyword(struct token *t)
709 for (i = 0; keywords[i].val; i++) {
710 if (!strcmp(t->val, keywords[i].val)) {
711 t->type = keywords[i].type;
718 * Get the next token. We have to keep track of which state we're in to know
719 * if we're looking to get a string literal or a keyword.
721 * *p is updated to point at the first character after the current token.
723 static void get_token(char **p, struct token *t, enum lex_state state)
729 /* eat non EOL whitespace */
734 * eat comments. note that string literals can't begin with #, but
735 * can contain a # after their first character.
738 while (*c && *c != '\n')
745 } else if (*c == '\0') {
748 } else if (state == L_SLITERAL) {
749 get_string(&c, t, '\n', 0);
750 } else if (state == L_KEYWORD) {
752 * when we expect a keyword, we first get the next string
753 * token delimited by whitespace, and then check if it
754 * matches a keyword in our keyword list. if it does, it's
755 * converted to a keyword token of the appropriate type, and
756 * if not, it remains a string token.
758 get_string(&c, t, ' ', 1);
766 * Increment *c until we get to the end of the current line, or EOF.
768 static void eol_or_eof(char **c)
770 while (**c && **c != '\n')
775 * All of these parse_* functions share some common behavior.
777 * They finish with *c pointing after the token they parse, and return 1 on
778 * success, or < 0 on error.
782 * Parse a string literal and store a pointer it at *dst. String literals
783 * terminate at the end of the line.
785 static int parse_sliteral(char **c, char **dst)
790 get_token(c, &t, L_SLITERAL);
792 if (t.type != T_STRING) {
793 printf("Expected string literal: %.*s\n", (int)(*c - s), s);
803 * Parse a base 10 (unsigned) integer and store it at *dst.
805 static int parse_integer(char **c, int *dst)
810 get_token(c, &t, L_SLITERAL);
812 if (t.type != T_STRING) {
813 printf("Expected string: %.*s\n", (int)(*c - s), s);
817 *dst = simple_strtol(t.val, NULL, 10);
824 static int parse_pxefile_top(cmd_tbl_t *cmdtp, char *p, unsigned long base,
825 struct pxe_menu *cfg, int nest_level);
828 * Parse an include statement, and retrieve and parse the file it mentions.
830 * base should point to a location where it's safe to store the file, and
831 * nest_level should indicate how many nested includes have occurred. For this
832 * include, nest_level has already been incremented and doesn't need to be
835 static int handle_include(cmd_tbl_t *cmdtp, char **c, unsigned long base,
836 struct pxe_menu *cfg, int nest_level)
844 err = parse_sliteral(c, &include_path);
847 printf("Expected include path: %.*s\n", (int)(*c - s), s);
851 err = get_pxe_file(cmdtp, include_path, base);
854 printf("Couldn't retrieve %s\n", include_path);
858 buf = map_sysmem(base, 0);
859 ret = parse_pxefile_top(cmdtp, buf, base, cfg, nest_level);
866 * Parse lines that begin with 'menu'.
868 * base and nest are provided to handle the 'menu include' case.
870 * base should point to a location where it's safe to store the included file.
872 * nest_level should be 1 when parsing the top level pxe file, 2 when parsing
873 * a file it includes, 3 when parsing a file included by that file, and so on.
875 static int parse_menu(cmd_tbl_t *cmdtp, char **c, struct pxe_menu *cfg,
876 unsigned long base, int nest_level)
882 get_token(c, &t, L_KEYWORD);
886 err = parse_sliteral(c, &cfg->title);
891 err = handle_include(cmdtp, c, base, cfg, nest_level + 1);
895 err = parse_sliteral(c, &cfg->bmp);
899 printf("Ignoring malformed menu command: %.*s\n",
912 * Handles parsing a 'menu line' when we're parsing a label.
914 static int parse_label_menu(char **c, struct pxe_menu *cfg,
915 struct pxe_label *label)
922 get_token(c, &t, L_KEYWORD);
926 if (!cfg->default_label)
927 cfg->default_label = strdup(label->name);
929 if (!cfg->default_label)
934 parse_sliteral(c, &label->menu);
937 printf("Ignoring malformed menu command: %.*s\n",
947 * Handles parsing a 'kernel' label.
948 * expecting "filename" or "<fit_filename>#cfg"
950 static int parse_label_kernel(char **c, struct pxe_label *label)
955 err = parse_sliteral(c, &label->kernel);
959 s = strstr(label->kernel, "#");
963 label->config = malloc(strlen(s) + 1);
967 strcpy(label->config, s);
974 * Parses a label and adds it to the list of labels for a menu.
976 * A label ends when we either get to the end of a file, or
977 * get some input we otherwise don't have a handler defined
981 static int parse_label(char **c, struct pxe_menu *cfg)
986 struct pxe_label *label;
989 label = label_create();
993 err = parse_sliteral(c, &label->name);
995 printf("Expected label name: %.*s\n", (int)(*c - s), s);
996 label_destroy(label);
1000 list_add_tail(&label->list, &cfg->labels);
1004 get_token(c, &t, L_KEYWORD);
1009 err = parse_label_menu(c, cfg, label);
1014 err = parse_label_kernel(c, label);
1018 err = parse_sliteral(c, &label->append);
1021 s = strstr(label->append, "initrd=");
1025 len = (int)(strchr(s, ' ') - s);
1026 label->initrd = malloc(len + 1);
1027 strncpy(label->initrd, s, len);
1028 label->initrd[len] = '\0';
1034 err = parse_sliteral(c, &label->initrd);
1039 err = parse_sliteral(c, &label->fdt);
1044 err = parse_sliteral(c, &label->fdtdir);
1048 label->localboot = 1;
1049 err = parse_integer(c, &label->localboot_val);
1053 err = parse_integer(c, &label->ipappend);
1061 * put the token back! we don't want it - it's the end
1062 * of a label and whatever token this is, it's
1063 * something for the menu level context to handle.
1075 * This 16 comes from the limit pxelinux imposes on nested includes.
1077 * There is no reason at all we couldn't do more, but some limit helps prevent
1078 * infinite (until crash occurs) recursion if a file tries to include itself.
1080 #define MAX_NEST_LEVEL 16
1083 * Entry point for parsing a menu file. nest_level indicates how many times
1084 * we've nested in includes. It will be 1 for the top level menu file.
1086 * Returns 1 on success, < 0 on error.
1088 static int parse_pxefile_top(cmd_tbl_t *cmdtp, char *p, unsigned long base,
1089 struct pxe_menu *cfg, int nest_level)
1092 char *s, *b, *label_name;
1097 if (nest_level > MAX_NEST_LEVEL) {
1098 printf("Maximum nesting (%d) exceeded\n", MAX_NEST_LEVEL);
1105 get_token(&p, &t, L_KEYWORD);
1111 err = parse_menu(cmdtp, &p, cfg,
1112 base + ALIGN(strlen(b) + 1, 4),
1117 err = parse_integer(&p, &cfg->timeout);
1121 err = parse_label(&p, cfg);
1126 err = parse_sliteral(&p, &label_name);
1129 if (cfg->default_label)
1130 free(cfg->default_label);
1132 cfg->default_label = label_name;
1138 err = handle_include(cmdtp, &p,
1139 base + ALIGN(strlen(b), 4), cfg,
1154 printf("Ignoring unknown command: %.*s\n",
1165 * Free the memory used by a pxe_menu and its labels.
1167 void destroy_pxe_menu(struct pxe_menu *cfg)
1169 struct list_head *pos, *n;
1170 struct pxe_label *label;
1175 if (cfg->default_label)
1176 free(cfg->default_label);
1178 list_for_each_safe(pos, n, &cfg->labels) {
1179 label = list_entry(pos, struct pxe_label, list);
1181 label_destroy(label);
1188 * Entry point for parsing a pxe file. This is only used for the top level
1191 * Returns NULL if there is an error, otherwise, returns a pointer to a
1192 * pxe_menu struct populated with the results of parsing the pxe file (and any
1193 * files it includes). The resulting pxe_menu struct can be free()'d by using
1194 * the destroy_pxe_menu() function.
1196 struct pxe_menu *parse_pxefile(cmd_tbl_t *cmdtp, unsigned long menucfg)
1198 struct pxe_menu *cfg;
1202 cfg = malloc(sizeof(struct pxe_menu));
1207 memset(cfg, 0, sizeof(struct pxe_menu));
1209 INIT_LIST_HEAD(&cfg->labels);
1211 buf = map_sysmem(menucfg, 0);
1212 r = parse_pxefile_top(cmdtp, buf, menucfg, cfg, 1);
1216 destroy_pxe_menu(cfg);
1224 * Converts a pxe_menu struct into a menu struct for use with U-Boot's generic
1227 static struct menu *pxe_menu_to_menu(struct pxe_menu *cfg)
1229 struct pxe_label *label;
1230 struct list_head *pos;
1234 char *default_num = NULL;
1237 * Create a menu and add items for all the labels.
1239 m = menu_create(cfg->title, DIV_ROUND_UP(cfg->timeout, 10),
1240 cfg->prompt, label_print, NULL, NULL);
1245 list_for_each(pos, &cfg->labels) {
1246 label = list_entry(pos, struct pxe_label, list);
1248 sprintf(label->num, "%d", i++);
1249 if (menu_item_add(m, label->num, label) != 1) {
1253 if (cfg->default_label &&
1254 (strcmp(label->name, cfg->default_label) == 0))
1255 default_num = label->num;
1259 * After we've created items for each label in the menu, set the
1260 * menu's default label if one was specified.
1263 err = menu_default_set(m, default_num);
1265 if (err != -ENOENT) {
1270 printf("Missing default: %s\n", cfg->default_label);
1278 * Try to boot any labels we have yet to attempt to boot.
1280 static void boot_unattempted_labels(cmd_tbl_t *cmdtp, struct pxe_menu *cfg)
1282 struct list_head *pos;
1283 struct pxe_label *label;
1285 list_for_each(pos, &cfg->labels) {
1286 label = list_entry(pos, struct pxe_label, list);
1288 if (!label->attempted)
1289 label_boot(cmdtp, label);
1294 * Boot the system as prescribed by a pxe_menu.
1296 * Use the menu system to either get the user's choice or the default, based
1297 * on config or user input. If there is no default or user's choice,
1298 * attempted to boot labels in the order they were given in pxe files.
1299 * If the default or user's choice fails to boot, attempt to boot other
1300 * labels in the order they were given in pxe files.
1302 * If this function returns, there weren't any labels that successfully
1303 * booted, or the user interrupted the menu selection via ctrl+c.
1305 void handle_pxe_menu(cmd_tbl_t *cmdtp, struct pxe_menu *cfg)
1311 #ifdef CONFIG_CMD_BMP
1312 /* display BMP if available */
1314 if (get_relfile(cmdtp, cfg->bmp, image_load_addr)) {
1315 if (CONFIG_IS_ENABLED(CMD_CLS))
1316 run_command("cls", 0);
1317 bmp_display(image_load_addr,
1318 BMP_ALIGN_CENTER, BMP_ALIGN_CENTER);
1320 printf("Skipping background bmp %s for failure\n",
1326 m = pxe_menu_to_menu(cfg);
1330 err = menu_get_choice(m, &choice);
1335 * err == 1 means we got a choice back from menu_get_choice.
1337 * err == -ENOENT if the menu was setup to select the default but no
1338 * default was set. in that case, we should continue trying to boot
1339 * labels that haven't been attempted yet.
1341 * otherwise, the user interrupted or there was some other error and
1346 err = label_boot(cmdtp, choice);
1349 } else if (err != -ENOENT) {
1353 boot_unattempted_labels(cmdtp, cfg);