1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2010-2011 Calxeda, Inc.
4 * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
11 #include <linux/string.h>
12 #include <linux/ctype.h>
14 #include <linux/list.h>
21 #define MAX_TFTP_PATH_LEN 127
23 const char *pxe_default_paths[] = {
25 "default-" CONFIG_SYS_ARCH "-" CONFIG_SYS_SOC,
27 "default-" CONFIG_SYS_ARCH,
35 * Like env_get, but prints an error if envvar isn't defined in the
36 * environment. It always returns what env_get does, so it can be used in
37 * place of env_get without changing error handling otherwise.
39 static char *from_env(const char *envvar)
43 ret = env_get(envvar);
46 printf("missing environment variable: %s\n", envvar);
53 * Convert an ethaddr from the environment to the format used by pxelinux
54 * filenames based on mac addresses. Convert's ':' to '-', and adds "01-" to
55 * the beginning of the ethernet address to indicate a hardware type of
56 * Ethernet. Also converts uppercase hex characters into lowercase, to match
57 * pxelinux's behavior.
59 * Returns 1 for success, -ENOENT if 'ethaddr' is undefined in the
60 * environment, or some other value < 0 on error.
62 static int format_mac_pxe(char *outbuf, size_t outbuf_len)
66 if (outbuf_len < 21) {
67 printf("outbuf is too small (%zd < 21)\n", outbuf_len);
72 if (!eth_env_get_enetaddr_by_index("eth", eth_get_dev_index(), ethaddr))
75 sprintf(outbuf, "01-%02x-%02x-%02x-%02x-%02x-%02x",
76 ethaddr[0], ethaddr[1], ethaddr[2],
77 ethaddr[3], ethaddr[4], ethaddr[5]);
84 * Returns the directory the file specified in the bootfile env variable is
85 * in. If bootfile isn't defined in the environment, return NULL, which should
86 * be interpreted as "don't prepend anything to paths".
88 static int get_bootfile_path(const char *file_path, char *bootfile_path,
89 size_t bootfile_path_size)
91 char *bootfile, *last_slash;
94 /* Only syslinux allows absolute paths */
95 if (file_path[0] == '/' && !is_pxe)
98 bootfile = from_env("bootfile");
103 last_slash = strrchr(bootfile, '/');
105 if (last_slash == NULL)
108 path_len = (last_slash - bootfile) + 1;
110 if (bootfile_path_size < path_len) {
111 printf("bootfile_path too small. (%zd < %zd)\n",
112 bootfile_path_size, path_len);
117 strncpy(bootfile_path, bootfile, path_len);
120 bootfile_path[path_len] = '\0';
125 static int (*do_getfile)(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr);
127 #ifdef CONFIG_CMD_NET
128 static int do_get_tftp(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr)
130 char *tftp_argv[] = {"tftp", NULL, NULL, NULL};
132 tftp_argv[1] = file_addr;
133 tftp_argv[2] = (void *)file_path;
135 if (do_tftpb(cmdtp, 0, 3, tftp_argv))
142 static char *fs_argv[5];
144 static int do_get_ext2(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr)
146 #ifdef CONFIG_CMD_EXT2
147 fs_argv[0] = "ext2load";
148 fs_argv[3] = file_addr;
149 fs_argv[4] = (void *)file_path;
151 if (!do_ext2load(cmdtp, 0, 5, fs_argv))
157 static int do_get_fat(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr)
159 #ifdef CONFIG_CMD_FAT
160 fs_argv[0] = "fatload";
161 fs_argv[3] = file_addr;
162 fs_argv[4] = (void *)file_path;
164 if (!do_fat_fsload(cmdtp, 0, 5, fs_argv))
170 static int do_get_any(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr)
172 #ifdef CONFIG_CMD_FS_GENERIC
174 fs_argv[3] = file_addr;
175 fs_argv[4] = (void *)file_path;
177 if (!do_load(cmdtp, 0, 5, fs_argv, FS_TYPE_ANY))
184 * As in pxelinux, paths to files referenced from files we retrieve are
185 * relative to the location of bootfile. get_relfile takes such a path and
186 * joins it with the bootfile path to get the full path to the target file. If
187 * the bootfile path is NULL, we use file_path as is.
189 * Returns 1 for success, or < 0 on error.
191 static int get_relfile(cmd_tbl_t *cmdtp, const char *file_path,
192 unsigned long file_addr)
195 char relfile[MAX_TFTP_PATH_LEN+1];
199 err = get_bootfile_path(file_path, relfile, sizeof(relfile));
204 path_len = strlen(file_path);
205 path_len += strlen(relfile);
207 if (path_len > MAX_TFTP_PATH_LEN) {
208 printf("Base path too long (%s%s)\n",
212 return -ENAMETOOLONG;
215 strcat(relfile, file_path);
217 printf("Retrieving file: %s\n", relfile);
219 sprintf(addr_buf, "%lx", file_addr);
221 return do_getfile(cmdtp, relfile, addr_buf);
225 * Retrieve the file at 'file_path' to the locate given by 'file_addr'. If
226 * 'bootfile' was specified in the environment, the path to bootfile will be
227 * prepended to 'file_path' and the resulting path will be used.
229 * Returns 1 on success, or < 0 for error.
231 static int get_pxe_file(cmd_tbl_t *cmdtp, const char *file_path,
232 unsigned long file_addr)
234 unsigned long config_file_size;
239 err = get_relfile(cmdtp, file_path, file_addr);
245 * the file comes without a NUL byte at the end, so find out its size
246 * and add the NUL byte.
248 tftp_filesize = from_env("filesize");
253 if (strict_strtoul(tftp_filesize, 16, &config_file_size) < 0)
256 buf = map_sysmem(file_addr + config_file_size, 1);
263 #ifdef CONFIG_CMD_NET
265 #define PXELINUX_DIR "pxelinux.cfg/"
268 * Retrieves a file in the 'pxelinux.cfg' folder. Since this uses get_pxe_file
269 * to do the hard work, the location of the 'pxelinux.cfg' folder is generated
270 * from the bootfile path, as described above.
272 * Returns 1 on success or < 0 on error.
274 static int get_pxelinux_path(cmd_tbl_t *cmdtp, const char *file,
275 unsigned long pxefile_addr_r)
277 size_t base_len = strlen(PXELINUX_DIR);
278 char path[MAX_TFTP_PATH_LEN+1];
280 if (base_len + strlen(file) > MAX_TFTP_PATH_LEN) {
281 printf("path (%s%s) too long, skipping\n",
283 return -ENAMETOOLONG;
286 sprintf(path, PXELINUX_DIR "%s", file);
288 return get_pxe_file(cmdtp, path, pxefile_addr_r);
292 * Looks for a pxe file with a name based on the pxeuuid environment variable.
294 * Returns 1 on success or < 0 on error.
296 static int pxe_uuid_path(cmd_tbl_t *cmdtp, unsigned long pxefile_addr_r)
300 uuid_str = from_env("pxeuuid");
305 return get_pxelinux_path(cmdtp, uuid_str, pxefile_addr_r);
309 * Looks for a pxe file with a name based on the 'ethaddr' environment
312 * Returns 1 on success or < 0 on error.
314 static int pxe_mac_path(cmd_tbl_t *cmdtp, unsigned long pxefile_addr_r)
319 err = format_mac_pxe(mac_str, sizeof(mac_str));
324 return get_pxelinux_path(cmdtp, mac_str, pxefile_addr_r);
328 * Looks for pxe files with names based on our IP address. See pxelinux
329 * documentation for details on what these file names look like. We match
332 * Returns 1 on success or < 0 on error.
334 static int pxe_ipaddr_paths(cmd_tbl_t *cmdtp, unsigned long pxefile_addr_r)
339 sprintf(ip_addr, "%08X", ntohl(net_ip.s_addr));
341 for (mask_pos = 7; mask_pos >= 0; mask_pos--) {
342 err = get_pxelinux_path(cmdtp, ip_addr, pxefile_addr_r);
347 ip_addr[mask_pos] = '\0';
354 * Entry point for the 'pxe get' command.
355 * This Follows pxelinux's rules to download a config file from a tftp server.
356 * The file is stored at the location given by the pxefile_addr_r environment
357 * variable, which must be set.
359 * UUID comes from pxeuuid env variable, if defined
360 * MAC addr comes from ethaddr env variable, if defined
363 * see http://syslinux.zytor.com/wiki/index.php/PXELINUX
365 * Returns 0 on success or 1 on error.
368 do_pxe_get(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
370 char *pxefile_addr_str;
371 unsigned long pxefile_addr_r;
374 do_getfile = do_get_tftp;
377 return CMD_RET_USAGE;
379 pxefile_addr_str = from_env("pxefile_addr_r");
381 if (!pxefile_addr_str)
384 err = strict_strtoul(pxefile_addr_str, 16,
385 (unsigned long *)&pxefile_addr_r);
390 * Keep trying paths until we successfully get a file we're looking
393 if (pxe_uuid_path(cmdtp, pxefile_addr_r) > 0 ||
394 pxe_mac_path(cmdtp, pxefile_addr_r) > 0 ||
395 pxe_ipaddr_paths(cmdtp, pxefile_addr_r) > 0) {
396 printf("Config file found\n");
401 while (pxe_default_paths[i]) {
402 if (get_pxelinux_path(cmdtp, pxe_default_paths[i],
403 pxefile_addr_r) > 0) {
404 printf("Config file found\n");
410 printf("Config file not found\n");
417 * Wrapper to make it easier to store the file at file_path in the location
418 * specified by envaddr_name. file_path will be joined to the bootfile path,
419 * if any is specified.
421 * Returns 1 on success or < 0 on error.
423 static int get_relfile_envaddr(cmd_tbl_t *cmdtp, const char *file_path, const char *envaddr_name)
425 unsigned long file_addr;
428 envaddr = from_env(envaddr_name);
433 if (strict_strtoul(envaddr, 16, &file_addr) < 0)
436 return get_relfile(cmdtp, file_path, file_addr);
440 * A note on the pxe file parser.
442 * We're parsing files that use syslinux grammar, which has a few quirks.
443 * String literals must be recognized based on context - there is no
444 * quoting or escaping support. There's also nothing to explicitly indicate
445 * when a label section completes. We deal with that by ending a label
446 * section whenever we see a line that doesn't include.
448 * As with the syslinux family, this same file format could be reused in the
449 * future for non pxe purposes. The only action it takes during parsing that
450 * would throw this off is handling of include files. It assumes we're using
451 * pxe, and does a tftp download of a file listed as an include file in the
452 * middle of the parsing operation. That could be handled by refactoring it to
453 * take a 'include file getter' function.
457 * Describes a single label given in a pxe file.
459 * Create these with the 'label_create' function given below.
461 * name - the name of the menu as given on the 'menu label' line.
462 * kernel - the path to the kernel file to use for this label.
463 * append - kernel command line to use when booting this label
464 * initrd - path to the initrd to use for this label.
465 * attempted - 0 if we haven't tried to boot this label, 1 if we have.
466 * localboot - 1 if this label specified 'localboot', 0 otherwise.
467 * list - lets these form a list, which a pxe_menu struct will hold.
482 struct list_head list;
486 * Describes a pxe menu as given via pxe files.
488 * title - the name of the menu as given by a 'menu title' line.
489 * default_label - the name of the default label, if any.
490 * timeout - time in tenths of a second to wait for a user key-press before
491 * booting the default label.
492 * prompt - if 0, don't prompt for a choice unless the timeout period is
493 * interrupted. If 1, always prompt for a choice regardless of
495 * labels - a list of labels defined for the menu.
502 struct list_head labels;
506 * Allocates memory for and initializes a pxe_label. This uses malloc, so the
507 * result must be free()'d to reclaim the memory.
509 * Returns NULL if malloc fails.
511 static struct pxe_label *label_create(void)
513 struct pxe_label *label;
515 label = malloc(sizeof(struct pxe_label));
520 memset(label, 0, sizeof(struct pxe_label));
526 * Free the memory used by a pxe_label, including that used by its name,
527 * kernel, append and initrd members, if they're non NULL.
529 * So - be sure to only use dynamically allocated memory for the members of
530 * the pxe_label struct, unless you want to clean it up first. These are
531 * currently only created by the pxe file parsing code.
533 static void label_destroy(struct pxe_label *label)
557 * Print a label and its string members if they're defined.
559 * This is passed as a callback to the menu code for displaying each
562 static void label_print(void *data)
564 struct pxe_label *label = data;
565 const char *c = label->menu ? label->menu : label->name;
567 printf("%s:\t%s\n", label->num, c);
571 * Boot a label that specified 'localboot'. This requires that the 'localcmd'
572 * environment variable is defined. Its contents will be executed as U-Boot
573 * command. If the label specified an 'append' line, its contents will be
574 * used to overwrite the contents of the 'bootargs' environment variable prior
575 * to running 'localcmd'.
577 * Returns 1 on success or < 0 on error.
579 static int label_localboot(struct pxe_label *label)
583 localcmd = from_env("localcmd");
589 char bootargs[CONFIG_SYS_CBSIZE];
591 cli_simple_process_macros(label->append, bootargs);
592 env_set("bootargs", bootargs);
595 debug("running: %s\n", localcmd);
597 return run_command_list(localcmd, strlen(localcmd), 0);
601 * Boot according to the contents of a pxe_label.
603 * If we can't boot for any reason, we return. A successful boot never
606 * The kernel will be stored in the location given by the 'kernel_addr_r'
607 * environment variable.
609 * If the label specifies an initrd file, it will be stored in the location
610 * given by the 'ramdisk_addr_r' environment variable.
612 * If the label specifies an 'append' line, its contents will overwrite that
613 * of the 'bootargs' environment variable.
615 static int label_boot(cmd_tbl_t *cmdtp, struct pxe_label *label)
617 char *bootm_argv[] = { "bootm", NULL, NULL, NULL, NULL };
619 char mac_str[29] = "";
620 char ip_str[68] = "";
628 label->attempted = 1;
630 if (label->localboot) {
631 if (label->localboot_val >= 0)
632 label_localboot(label);
636 if (label->kernel == NULL) {
637 printf("No kernel given, skipping %s\n",
643 if (get_relfile_envaddr(cmdtp, label->initrd, "ramdisk_addr_r") < 0) {
644 printf("Skipping %s for failure retrieving initrd\n",
649 bootm_argv[2] = initrd_str;
650 strncpy(bootm_argv[2], env_get("ramdisk_addr_r"), 18);
651 strcat(bootm_argv[2], ":");
652 strncat(bootm_argv[2], env_get("filesize"), 9);
655 if (get_relfile_envaddr(cmdtp, label->kernel, "kernel_addr_r") < 0) {
656 printf("Skipping %s for failure retrieving kernel\n",
661 if (label->ipappend & 0x1) {
662 sprintf(ip_str, " ip=%s:%s:%s:%s",
663 env_get("ipaddr"), env_get("serverip"),
664 env_get("gatewayip"), env_get("netmask"));
667 #ifdef CONFIG_CMD_NET
668 if (label->ipappend & 0x2) {
670 strcpy(mac_str, " BOOTIF=");
671 err = format_mac_pxe(mac_str + 8, sizeof(mac_str) - 8);
677 if ((label->ipappend & 0x3) || label->append) {
678 char bootargs[CONFIG_SYS_CBSIZE] = "";
679 char finalbootargs[CONFIG_SYS_CBSIZE];
681 if (strlen(label->append ?: "") +
682 strlen(ip_str) + strlen(mac_str) + 1 > sizeof(bootargs)) {
683 printf("bootarg overflow %zd+%zd+%zd+1 > %zd\n",
684 strlen(label->append ?: ""),
685 strlen(ip_str), strlen(mac_str),
690 strncpy(bootargs, label->append,
692 strcat(bootargs, ip_str);
693 strcat(bootargs, mac_str);
695 cli_simple_process_macros(bootargs, finalbootargs);
696 env_set("bootargs", finalbootargs);
697 printf("append: %s\n", finalbootargs);
701 bootm_argv[1] = env_get("kernel_addr_r");
704 * fdt usage is optional:
705 * It handles the following scenarios. All scenarios are exclusive
707 * Scenario 1: If fdt_addr_r specified and "fdt" label is defined in
708 * pxe file, retrieve fdt blob from server. Pass fdt_addr_r to bootm,
709 * and adjust argc appropriately.
711 * Scenario 2: If there is an fdt_addr specified, pass it along to
712 * bootm, and adjust argc appropriately.
714 * Scenario 3: fdt blob is not available.
716 bootm_argv[3] = env_get("fdt_addr_r");
718 /* if fdt label is defined then get fdt from server */
720 char *fdtfile = NULL;
721 char *fdtfilefree = NULL;
724 fdtfile = label->fdt;
725 } else if (label->fdtdir) {
726 char *f1, *f2, *f3, *f4, *slash;
728 f1 = env_get("fdtfile");
735 * For complex cases where this code doesn't
736 * generate the correct filename, the board
737 * code should set $fdtfile during early boot,
738 * or the boot scripts should set $fdtfile
739 * before invoking "pxe" or "sysboot".
743 f3 = env_get("board");
747 len = strlen(label->fdtdir);
750 else if (label->fdtdir[len - 1] != '/')
755 len = strlen(label->fdtdir) + strlen(slash) +
756 strlen(f1) + strlen(f2) + strlen(f3) +
758 fdtfilefree = malloc(len);
760 printf("malloc fail (FDT filename)\n");
764 snprintf(fdtfilefree, len, "%s%s%s%s%s%s",
765 label->fdtdir, slash, f1, f2, f3, f4);
766 fdtfile = fdtfilefree;
770 int err = get_relfile_envaddr(cmdtp, fdtfile, "fdt_addr_r");
773 printf("Skipping %s for failure retrieving fdt\n",
778 bootm_argv[3] = NULL;
783 bootm_argv[3] = env_get("fdt_addr");
791 kernel_addr = genimg_get_kernel_addr(bootm_argv[1]);
792 buf = map_sysmem(kernel_addr, 0);
793 /* Try bootm for legacy and FIT format image */
794 if (genimg_get_format(buf) != IMAGE_FORMAT_INVALID)
795 do_bootm(cmdtp, 0, bootm_argc, bootm_argv);
796 #ifdef CONFIG_CMD_BOOTI
797 /* Try booting an AArch64 Linux kernel image */
799 do_booti(cmdtp, 0, bootm_argc, bootm_argv);
800 #elif defined(CONFIG_CMD_BOOTZ)
801 /* Try booting a Image */
803 do_bootz(cmdtp, 0, bootm_argc, bootm_argv);
810 * Tokens for the pxe file parser.
836 * A token - given by a value and a type.
840 enum token_type type;
844 * Keywords recognized.
846 static const struct token keywords[] = {
849 {"timeout", T_TIMEOUT},
850 {"default", T_DEFAULT},
851 {"prompt", T_PROMPT},
853 {"kernel", T_KERNEL},
855 {"localboot", T_LOCALBOOT},
856 {"append", T_APPEND},
857 {"initrd", T_INITRD},
858 {"include", T_INCLUDE},
859 {"devicetree", T_FDT},
861 {"devicetreedir", T_FDTDIR},
862 {"fdtdir", T_FDTDIR},
863 {"ontimeout", T_ONTIMEOUT,},
864 {"ipappend", T_IPAPPEND,},
869 * Since pxe(linux) files don't have a token to identify the start of a
870 * literal, we have to keep track of when we're in a state where a literal is
871 * expected vs when we're in a state a keyword is expected.
880 * get_string retrieves a string from *p and stores it as a token in
883 * get_string used for scanning both string literals and keywords.
885 * Characters from *p are copied into t-val until a character equal to
886 * delim is found, or a NUL byte is reached. If delim has the special value of
887 * ' ', any whitespace character will be used as a delimiter.
889 * If lower is unequal to 0, uppercase characters will be converted to
890 * lowercase in the result. This is useful to make keywords case
893 * The location of *p is updated to point to the first character after the end
894 * of the token - the ending delimiter.
896 * On success, the new value of t->val is returned. Memory for t->val is
897 * allocated using malloc and must be free()'d to reclaim it. If insufficient
898 * memory is available, NULL is returned.
900 static char *get_string(char **p, struct token *t, char delim, int lower)
906 * b and e both start at the beginning of the input stream.
908 * e is incremented until we find the ending delimiter, or a NUL byte
909 * is reached. Then, we take e - b to find the length of the token.
914 if ((delim == ' ' && isspace(*e)) || delim == *e)
922 * Allocate memory to hold the string, and copy it in, converting
923 * characters to lowercase if lower is != 0.
925 t->val = malloc(len + 1);
929 for (i = 0; i < len; i++, b++) {
931 t->val[i] = tolower(*b);
939 * Update *p so the caller knows where to continue scanning.
949 * Populate a keyword token with a type and value.
951 static void get_keyword(struct token *t)
955 for (i = 0; keywords[i].val; i++) {
956 if (!strcmp(t->val, keywords[i].val)) {
957 t->type = keywords[i].type;
964 * Get the next token. We have to keep track of which state we're in to know
965 * if we're looking to get a string literal or a keyword.
967 * *p is updated to point at the first character after the current token.
969 static void get_token(char **p, struct token *t, enum lex_state state)
975 /* eat non EOL whitespace */
980 * eat comments. note that string literals can't begin with #, but
981 * can contain a # after their first character.
984 while (*c && *c != '\n')
991 } else if (*c == '\0') {
994 } else if (state == L_SLITERAL) {
995 get_string(&c, t, '\n', 0);
996 } else if (state == L_KEYWORD) {
998 * when we expect a keyword, we first get the next string
999 * token delimited by whitespace, and then check if it
1000 * matches a keyword in our keyword list. if it does, it's
1001 * converted to a keyword token of the appropriate type, and
1002 * if not, it remains a string token.
1004 get_string(&c, t, ' ', 1);
1012 * Increment *c until we get to the end of the current line, or EOF.
1014 static void eol_or_eof(char **c)
1016 while (**c && **c != '\n')
1021 * All of these parse_* functions share some common behavior.
1023 * They finish with *c pointing after the token they parse, and return 1 on
1024 * success, or < 0 on error.
1028 * Parse a string literal and store a pointer it at *dst. String literals
1029 * terminate at the end of the line.
1031 static int parse_sliteral(char **c, char **dst)
1036 get_token(c, &t, L_SLITERAL);
1038 if (t.type != T_STRING) {
1039 printf("Expected string literal: %.*s\n", (int)(*c - s), s);
1049 * Parse a base 10 (unsigned) integer and store it at *dst.
1051 static int parse_integer(char **c, int *dst)
1056 get_token(c, &t, L_SLITERAL);
1058 if (t.type != T_STRING) {
1059 printf("Expected string: %.*s\n", (int)(*c - s), s);
1063 *dst = simple_strtol(t.val, NULL, 10);
1070 static int parse_pxefile_top(cmd_tbl_t *cmdtp, char *p, unsigned long base,
1071 struct pxe_menu *cfg, int nest_level);
1074 * Parse an include statement, and retrieve and parse the file it mentions.
1076 * base should point to a location where it's safe to store the file, and
1077 * nest_level should indicate how many nested includes have occurred. For this
1078 * include, nest_level has already been incremented and doesn't need to be
1081 static int handle_include(cmd_tbl_t *cmdtp, char **c, unsigned long base,
1082 struct pxe_menu *cfg, int nest_level)
1090 err = parse_sliteral(c, &include_path);
1093 printf("Expected include path: %.*s\n",
1098 err = get_pxe_file(cmdtp, include_path, base);
1101 printf("Couldn't retrieve %s\n", include_path);
1105 buf = map_sysmem(base, 0);
1106 ret = parse_pxefile_top(cmdtp, buf, base, cfg, nest_level);
1113 * Parse lines that begin with 'menu'.
1115 * base and nest are provided to handle the 'menu include' case.
1117 * base should point to a location where it's safe to store the included file.
1119 * nest_level should be 1 when parsing the top level pxe file, 2 when parsing
1120 * a file it includes, 3 when parsing a file included by that file, and so on.
1122 static int parse_menu(cmd_tbl_t *cmdtp, char **c, struct pxe_menu *cfg,
1123 unsigned long base, int nest_level)
1129 get_token(c, &t, L_KEYWORD);
1133 err = parse_sliteral(c, &cfg->title);
1138 err = handle_include(cmdtp, c, base, cfg,
1143 printf("Ignoring malformed menu command: %.*s\n",
1156 * Handles parsing a 'menu line' when we're parsing a label.
1158 static int parse_label_menu(char **c, struct pxe_menu *cfg,
1159 struct pxe_label *label)
1166 get_token(c, &t, L_KEYWORD);
1170 if (!cfg->default_label)
1171 cfg->default_label = strdup(label->name);
1173 if (!cfg->default_label)
1178 parse_sliteral(c, &label->menu);
1181 printf("Ignoring malformed menu command: %.*s\n",
1191 * Parses a label and adds it to the list of labels for a menu.
1193 * A label ends when we either get to the end of a file, or
1194 * get some input we otherwise don't have a handler defined
1198 static int parse_label(char **c, struct pxe_menu *cfg)
1203 struct pxe_label *label;
1206 label = label_create();
1210 err = parse_sliteral(c, &label->name);
1212 printf("Expected label name: %.*s\n", (int)(*c - s), s);
1213 label_destroy(label);
1217 list_add_tail(&label->list, &cfg->labels);
1221 get_token(c, &t, L_KEYWORD);
1226 err = parse_label_menu(c, cfg, label);
1231 err = parse_sliteral(c, &label->kernel);
1235 err = parse_sliteral(c, &label->append);
1238 s = strstr(label->append, "initrd=");
1242 len = (int)(strchr(s, ' ') - s);
1243 label->initrd = malloc(len + 1);
1244 strncpy(label->initrd, s, len);
1245 label->initrd[len] = '\0';
1251 err = parse_sliteral(c, &label->initrd);
1256 err = parse_sliteral(c, &label->fdt);
1261 err = parse_sliteral(c, &label->fdtdir);
1265 label->localboot = 1;
1266 err = parse_integer(c, &label->localboot_val);
1270 err = parse_integer(c, &label->ipappend);
1278 * put the token back! we don't want it - it's the end
1279 * of a label and whatever token this is, it's
1280 * something for the menu level context to handle.
1292 * This 16 comes from the limit pxelinux imposes on nested includes.
1294 * There is no reason at all we couldn't do more, but some limit helps prevent
1295 * infinite (until crash occurs) recursion if a file tries to include itself.
1297 #define MAX_NEST_LEVEL 16
1300 * Entry point for parsing a menu file. nest_level indicates how many times
1301 * we've nested in includes. It will be 1 for the top level menu file.
1303 * Returns 1 on success, < 0 on error.
1305 static int parse_pxefile_top(cmd_tbl_t *cmdtp, char *p, unsigned long base,
1306 struct pxe_menu *cfg, int nest_level)
1309 char *s, *b, *label_name;
1314 if (nest_level > MAX_NEST_LEVEL) {
1315 printf("Maximum nesting (%d) exceeded\n", MAX_NEST_LEVEL);
1322 get_token(&p, &t, L_KEYWORD);
1328 err = parse_menu(cmdtp, &p, cfg,
1329 base + ALIGN(strlen(b) + 1, 4),
1334 err = parse_integer(&p, &cfg->timeout);
1338 err = parse_label(&p, cfg);
1343 err = parse_sliteral(&p, &label_name);
1346 if (cfg->default_label)
1347 free(cfg->default_label);
1349 cfg->default_label = label_name;
1355 err = handle_include(cmdtp, &p,
1356 base + ALIGN(strlen(b), 4), cfg,
1371 printf("Ignoring unknown command: %.*s\n",
1382 * Free the memory used by a pxe_menu and its labels.
1384 static void destroy_pxe_menu(struct pxe_menu *cfg)
1386 struct list_head *pos, *n;
1387 struct pxe_label *label;
1392 if (cfg->default_label)
1393 free(cfg->default_label);
1395 list_for_each_safe(pos, n, &cfg->labels) {
1396 label = list_entry(pos, struct pxe_label, list);
1398 label_destroy(label);
1405 * Entry point for parsing a pxe file. This is only used for the top level
1408 * Returns NULL if there is an error, otherwise, returns a pointer to a
1409 * pxe_menu struct populated with the results of parsing the pxe file (and any
1410 * files it includes). The resulting pxe_menu struct can be free()'d by using
1411 * the destroy_pxe_menu() function.
1413 static struct pxe_menu *parse_pxefile(cmd_tbl_t *cmdtp, unsigned long menucfg)
1415 struct pxe_menu *cfg;
1419 cfg = malloc(sizeof(struct pxe_menu));
1424 memset(cfg, 0, sizeof(struct pxe_menu));
1426 INIT_LIST_HEAD(&cfg->labels);
1428 buf = map_sysmem(menucfg, 0);
1429 r = parse_pxefile_top(cmdtp, buf, menucfg, cfg, 1);
1433 destroy_pxe_menu(cfg);
1441 * Converts a pxe_menu struct into a menu struct for use with U-Boot's generic
1444 static struct menu *pxe_menu_to_menu(struct pxe_menu *cfg)
1446 struct pxe_label *label;
1447 struct list_head *pos;
1451 char *default_num = NULL;
1454 * Create a menu and add items for all the labels.
1456 m = menu_create(cfg->title, cfg->timeout, cfg->prompt, label_print,
1462 list_for_each(pos, &cfg->labels) {
1463 label = list_entry(pos, struct pxe_label, list);
1465 sprintf(label->num, "%d", i++);
1466 if (menu_item_add(m, label->num, label) != 1) {
1470 if (cfg->default_label &&
1471 (strcmp(label->name, cfg->default_label) == 0))
1472 default_num = label->num;
1477 * After we've created items for each label in the menu, set the
1478 * menu's default label if one was specified.
1481 err = menu_default_set(m, default_num);
1483 if (err != -ENOENT) {
1488 printf("Missing default: %s\n", cfg->default_label);
1496 * Try to boot any labels we have yet to attempt to boot.
1498 static void boot_unattempted_labels(cmd_tbl_t *cmdtp, struct pxe_menu *cfg)
1500 struct list_head *pos;
1501 struct pxe_label *label;
1503 list_for_each(pos, &cfg->labels) {
1504 label = list_entry(pos, struct pxe_label, list);
1506 if (!label->attempted)
1507 label_boot(cmdtp, label);
1512 * Boot the system as prescribed by a pxe_menu.
1514 * Use the menu system to either get the user's choice or the default, based
1515 * on config or user input. If there is no default or user's choice,
1516 * attempted to boot labels in the order they were given in pxe files.
1517 * If the default or user's choice fails to boot, attempt to boot other
1518 * labels in the order they were given in pxe files.
1520 * If this function returns, there weren't any labels that successfully
1521 * booted, or the user interrupted the menu selection via ctrl+c.
1523 static void handle_pxe_menu(cmd_tbl_t *cmdtp, struct pxe_menu *cfg)
1529 m = pxe_menu_to_menu(cfg);
1533 err = menu_get_choice(m, &choice);
1538 * err == 1 means we got a choice back from menu_get_choice.
1540 * err == -ENOENT if the menu was setup to select the default but no
1541 * default was set. in that case, we should continue trying to boot
1542 * labels that haven't been attempted yet.
1544 * otherwise, the user interrupted or there was some other error and
1549 err = label_boot(cmdtp, choice);
1552 } else if (err != -ENOENT) {
1556 boot_unattempted_labels(cmdtp, cfg);
1559 #ifdef CONFIG_CMD_NET
1561 * Boots a system using a pxe file
1563 * Returns 0 on success, 1 on error.
1566 do_pxe_boot(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1568 unsigned long pxefile_addr_r;
1569 struct pxe_menu *cfg;
1570 char *pxefile_addr_str;
1572 do_getfile = do_get_tftp;
1575 pxefile_addr_str = from_env("pxefile_addr_r");
1576 if (!pxefile_addr_str)
1579 } else if (argc == 2) {
1580 pxefile_addr_str = argv[1];
1582 return CMD_RET_USAGE;
1585 if (strict_strtoul(pxefile_addr_str, 16, &pxefile_addr_r) < 0) {
1586 printf("Invalid pxefile address: %s\n", pxefile_addr_str);
1590 cfg = parse_pxefile(cmdtp, pxefile_addr_r);
1593 printf("Error parsing config file\n");
1597 handle_pxe_menu(cmdtp, cfg);
1599 destroy_pxe_menu(cfg);
1601 copy_filename(net_boot_file_name, "", sizeof(net_boot_file_name));
1606 static cmd_tbl_t cmd_pxe_sub[] = {
1607 U_BOOT_CMD_MKENT(get, 1, 1, do_pxe_get, "", ""),
1608 U_BOOT_CMD_MKENT(boot, 2, 1, do_pxe_boot, "", "")
1611 static int do_pxe(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1616 return CMD_RET_USAGE;
1620 /* drop initial "pxe" arg */
1624 cp = find_cmd_tbl(argv[0], cmd_pxe_sub, ARRAY_SIZE(cmd_pxe_sub));
1627 return cp->cmd(cmdtp, flag, argc, argv);
1629 return CMD_RET_USAGE;
1634 "commands to get and boot from pxe files",
1635 "get - try to retrieve a pxe file using tftp\npxe "
1636 "boot [pxefile_addr_r] - boot from the pxe file at pxefile_addr_r\n"
1641 * Boots a system using a local disk syslinux/extlinux file
1643 * Returns 0 on success, 1 on error.
1645 static int do_sysboot(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1647 unsigned long pxefile_addr_r;
1648 struct pxe_menu *cfg;
1649 char *pxefile_addr_str;
1655 if (argc > 1 && strstr(argv[1], "-p")) {
1662 return cmd_usage(cmdtp);
1665 pxefile_addr_str = from_env("pxefile_addr_r");
1666 if (!pxefile_addr_str)
1669 pxefile_addr_str = argv[4];
1673 filename = env_get("bootfile");
1676 env_set("bootfile", filename);
1679 if (strstr(argv[3], "ext2"))
1680 do_getfile = do_get_ext2;
1681 else if (strstr(argv[3], "fat"))
1682 do_getfile = do_get_fat;
1683 else if (strstr(argv[3], "any"))
1684 do_getfile = do_get_any;
1686 printf("Invalid filesystem: %s\n", argv[3]);
1689 fs_argv[1] = argv[1];
1690 fs_argv[2] = argv[2];
1692 if (strict_strtoul(pxefile_addr_str, 16, &pxefile_addr_r) < 0) {
1693 printf("Invalid pxefile address: %s\n", pxefile_addr_str);
1697 if (get_pxe_file(cmdtp, filename, pxefile_addr_r) < 0) {
1698 printf("Error reading config file\n");
1702 cfg = parse_pxefile(cmdtp, pxefile_addr_r);
1705 printf("Error parsing config file\n");
1712 handle_pxe_menu(cmdtp, cfg);
1714 destroy_pxe_menu(cfg);
1720 sysboot, 7, 1, do_sysboot,
1721 "command to get and boot from syslinux files",
1722 "[-p] <interface> <dev[:part]> <ext2|fat|any> [addr] [filename]\n"
1723 " - load and parse syslinux menu file 'filename' from ext2, fat\n"
1724 " or any filesystem on 'dev' on 'interface' to address 'addr'"