1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2010-2011 Calxeda, Inc.
4 * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
12 #include <linux/string.h>
13 #include <linux/ctype.h>
15 #include <linux/list.h>
23 #define MAX_TFTP_PATH_LEN 127
25 const char *pxe_default_paths[] = {
27 "default-" CONFIG_SYS_ARCH "-" CONFIG_SYS_SOC,
29 "default-" CONFIG_SYS_ARCH,
37 * Like env_get, but prints an error if envvar isn't defined in the
38 * environment. It always returns what env_get does, so it can be used in
39 * place of env_get without changing error handling otherwise.
41 static char *from_env(const char *envvar)
45 ret = env_get(envvar);
48 printf("missing environment variable: %s\n", envvar);
55 * Convert an ethaddr from the environment to the format used by pxelinux
56 * filenames based on mac addresses. Convert's ':' to '-', and adds "01-" to
57 * the beginning of the ethernet address to indicate a hardware type of
58 * Ethernet. Also converts uppercase hex characters into lowercase, to match
59 * pxelinux's behavior.
61 * Returns 1 for success, -ENOENT if 'ethaddr' is undefined in the
62 * environment, or some other value < 0 on error.
64 static int format_mac_pxe(char *outbuf, size_t outbuf_len)
68 if (outbuf_len < 21) {
69 printf("outbuf is too small (%zd < 21)\n", outbuf_len);
74 if (!eth_env_get_enetaddr_by_index("eth", eth_get_dev_index(), ethaddr))
77 sprintf(outbuf, "01-%02x-%02x-%02x-%02x-%02x-%02x",
78 ethaddr[0], ethaddr[1], ethaddr[2],
79 ethaddr[3], ethaddr[4], ethaddr[5]);
86 * Returns the directory the file specified in the bootfile env variable is
87 * in. If bootfile isn't defined in the environment, return NULL, which should
88 * be interpreted as "don't prepend anything to paths".
90 static int get_bootfile_path(const char *file_path, char *bootfile_path,
91 size_t bootfile_path_size)
93 char *bootfile, *last_slash;
96 /* Only syslinux allows absolute paths */
97 if (file_path[0] == '/' && !is_pxe)
100 bootfile = from_env("bootfile");
105 last_slash = strrchr(bootfile, '/');
107 if (last_slash == NULL)
110 path_len = (last_slash - bootfile) + 1;
112 if (bootfile_path_size < path_len) {
113 printf("bootfile_path too small. (%zd < %zd)\n",
114 bootfile_path_size, path_len);
119 strncpy(bootfile_path, bootfile, path_len);
122 bootfile_path[path_len] = '\0';
127 static int (*do_getfile)(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr);
129 #ifdef CONFIG_CMD_NET
130 static int do_get_tftp(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr)
132 char *tftp_argv[] = {"tftp", NULL, NULL, NULL};
134 tftp_argv[1] = file_addr;
135 tftp_argv[2] = (void *)file_path;
137 if (do_tftpb(cmdtp, 0, 3, tftp_argv))
144 static char *fs_argv[5];
146 static int do_get_ext2(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr)
148 #ifdef CONFIG_CMD_EXT2
149 fs_argv[0] = "ext2load";
150 fs_argv[3] = file_addr;
151 fs_argv[4] = (void *)file_path;
153 if (!do_ext2load(cmdtp, 0, 5, fs_argv))
159 static int do_get_fat(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr)
161 #ifdef CONFIG_CMD_FAT
162 fs_argv[0] = "fatload";
163 fs_argv[3] = file_addr;
164 fs_argv[4] = (void *)file_path;
166 if (!do_fat_fsload(cmdtp, 0, 5, fs_argv))
172 static int do_get_any(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr)
174 #ifdef CONFIG_CMD_FS_GENERIC
176 fs_argv[3] = file_addr;
177 fs_argv[4] = (void *)file_path;
179 if (!do_load(cmdtp, 0, 5, fs_argv, FS_TYPE_ANY))
186 * As in pxelinux, paths to files referenced from files we retrieve are
187 * relative to the location of bootfile. get_relfile takes such a path and
188 * joins it with the bootfile path to get the full path to the target file. If
189 * the bootfile path is NULL, we use file_path as is.
191 * Returns 1 for success, or < 0 on error.
193 static int get_relfile(cmd_tbl_t *cmdtp, const char *file_path,
194 unsigned long file_addr)
197 char relfile[MAX_TFTP_PATH_LEN+1];
201 err = get_bootfile_path(file_path, relfile, sizeof(relfile));
206 path_len = strlen(file_path);
207 path_len += strlen(relfile);
209 if (path_len > MAX_TFTP_PATH_LEN) {
210 printf("Base path too long (%s%s)\n",
214 return -ENAMETOOLONG;
217 strcat(relfile, file_path);
219 printf("Retrieving file: %s\n", relfile);
221 sprintf(addr_buf, "%lx", file_addr);
223 return do_getfile(cmdtp, relfile, addr_buf);
227 * Retrieve the file at 'file_path' to the locate given by 'file_addr'. If
228 * 'bootfile' was specified in the environment, the path to bootfile will be
229 * prepended to 'file_path' and the resulting path will be used.
231 * Returns 1 on success, or < 0 for error.
233 static int get_pxe_file(cmd_tbl_t *cmdtp, const char *file_path,
234 unsigned long file_addr)
236 unsigned long config_file_size;
241 err = get_relfile(cmdtp, file_path, file_addr);
247 * the file comes without a NUL byte at the end, so find out its size
248 * and add the NUL byte.
250 tftp_filesize = from_env("filesize");
255 if (strict_strtoul(tftp_filesize, 16, &config_file_size) < 0)
258 buf = map_sysmem(file_addr + config_file_size, 1);
265 #ifdef CONFIG_CMD_NET
267 #define PXELINUX_DIR "pxelinux.cfg/"
270 * Retrieves a file in the 'pxelinux.cfg' folder. Since this uses get_pxe_file
271 * to do the hard work, the location of the 'pxelinux.cfg' folder is generated
272 * from the bootfile path, as described above.
274 * Returns 1 on success or < 0 on error.
276 static int get_pxelinux_path(cmd_tbl_t *cmdtp, const char *file,
277 unsigned long pxefile_addr_r)
279 size_t base_len = strlen(PXELINUX_DIR);
280 char path[MAX_TFTP_PATH_LEN+1];
282 if (base_len + strlen(file) > MAX_TFTP_PATH_LEN) {
283 printf("path (%s%s) too long, skipping\n",
285 return -ENAMETOOLONG;
288 sprintf(path, PXELINUX_DIR "%s", file);
290 return get_pxe_file(cmdtp, path, pxefile_addr_r);
294 * Looks for a pxe file with a name based on the pxeuuid environment variable.
296 * Returns 1 on success or < 0 on error.
298 static int pxe_uuid_path(cmd_tbl_t *cmdtp, unsigned long pxefile_addr_r)
302 uuid_str = from_env("pxeuuid");
307 return get_pxelinux_path(cmdtp, uuid_str, pxefile_addr_r);
311 * Looks for a pxe file with a name based on the 'ethaddr' environment
314 * Returns 1 on success or < 0 on error.
316 static int pxe_mac_path(cmd_tbl_t *cmdtp, unsigned long pxefile_addr_r)
321 err = format_mac_pxe(mac_str, sizeof(mac_str));
326 return get_pxelinux_path(cmdtp, mac_str, pxefile_addr_r);
330 * Looks for pxe files with names based on our IP address. See pxelinux
331 * documentation for details on what these file names look like. We match
334 * Returns 1 on success or < 0 on error.
336 static int pxe_ipaddr_paths(cmd_tbl_t *cmdtp, unsigned long pxefile_addr_r)
341 sprintf(ip_addr, "%08X", ntohl(net_ip.s_addr));
343 for (mask_pos = 7; mask_pos >= 0; mask_pos--) {
344 err = get_pxelinux_path(cmdtp, ip_addr, pxefile_addr_r);
349 ip_addr[mask_pos] = '\0';
356 * Entry point for the 'pxe get' command.
357 * This Follows pxelinux's rules to download a config file from a tftp server.
358 * The file is stored at the location given by the pxefile_addr_r environment
359 * variable, which must be set.
361 * UUID comes from pxeuuid env variable, if defined
362 * MAC addr comes from ethaddr env variable, if defined
365 * see http://syslinux.zytor.com/wiki/index.php/PXELINUX
367 * Returns 0 on success or 1 on error.
370 do_pxe_get(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
372 char *pxefile_addr_str;
373 unsigned long pxefile_addr_r;
376 do_getfile = do_get_tftp;
379 return CMD_RET_USAGE;
381 pxefile_addr_str = from_env("pxefile_addr_r");
383 if (!pxefile_addr_str)
386 err = strict_strtoul(pxefile_addr_str, 16,
387 (unsigned long *)&pxefile_addr_r);
392 * Keep trying paths until we successfully get a file we're looking
395 if (pxe_uuid_path(cmdtp, pxefile_addr_r) > 0 ||
396 pxe_mac_path(cmdtp, pxefile_addr_r) > 0 ||
397 pxe_ipaddr_paths(cmdtp, pxefile_addr_r) > 0) {
398 printf("Config file found\n");
403 while (pxe_default_paths[i]) {
404 if (get_pxelinux_path(cmdtp, pxe_default_paths[i],
405 pxefile_addr_r) > 0) {
406 printf("Config file found\n");
412 printf("Config file not found\n");
419 * Wrapper to make it easier to store the file at file_path in the location
420 * specified by envaddr_name. file_path will be joined to the bootfile path,
421 * if any is specified.
423 * Returns 1 on success or < 0 on error.
425 static int get_relfile_envaddr(cmd_tbl_t *cmdtp, const char *file_path, const char *envaddr_name)
427 unsigned long file_addr;
430 envaddr = from_env(envaddr_name);
435 if (strict_strtoul(envaddr, 16, &file_addr) < 0)
438 return get_relfile(cmdtp, file_path, file_addr);
442 * A note on the pxe file parser.
444 * We're parsing files that use syslinux grammar, which has a few quirks.
445 * String literals must be recognized based on context - there is no
446 * quoting or escaping support. There's also nothing to explicitly indicate
447 * when a label section completes. We deal with that by ending a label
448 * section whenever we see a line that doesn't include.
450 * As with the syslinux family, this same file format could be reused in the
451 * future for non pxe purposes. The only action it takes during parsing that
452 * would throw this off is handling of include files. It assumes we're using
453 * pxe, and does a tftp download of a file listed as an include file in the
454 * middle of the parsing operation. That could be handled by refactoring it to
455 * take a 'include file getter' function.
459 * Describes a single label given in a pxe file.
461 * Create these with the 'label_create' function given below.
463 * name - the name of the menu as given on the 'menu label' line.
464 * kernel - the path to the kernel file to use for this label.
465 * append - kernel command line to use when booting this label
466 * initrd - path to the initrd to use for this label.
467 * attempted - 0 if we haven't tried to boot this label, 1 if we have.
468 * localboot - 1 if this label specified 'localboot', 0 otherwise.
469 * list - lets these form a list, which a pxe_menu struct will hold.
485 struct list_head list;
489 * Describes a pxe menu as given via pxe files.
491 * title - the name of the menu as given by a 'menu title' line.
492 * default_label - the name of the default label, if any.
493 * bmp - the bmp file name which is displayed in background
494 * timeout - time in tenths of a second to wait for a user key-press before
495 * booting the default label.
496 * prompt - if 0, don't prompt for a choice unless the timeout period is
497 * interrupted. If 1, always prompt for a choice regardless of
499 * labels - a list of labels defined for the menu.
507 struct list_head labels;
511 * Allocates memory for and initializes a pxe_label. This uses malloc, so the
512 * result must be free()'d to reclaim the memory.
514 * Returns NULL if malloc fails.
516 static struct pxe_label *label_create(void)
518 struct pxe_label *label;
520 label = malloc(sizeof(struct pxe_label));
525 memset(label, 0, sizeof(struct pxe_label));
531 * Free the memory used by a pxe_label, including that used by its name,
532 * kernel, append and initrd members, if they're non NULL.
534 * So - be sure to only use dynamically allocated memory for the members of
535 * the pxe_label struct, unless you want to clean it up first. These are
536 * currently only created by the pxe file parsing code.
538 static void label_destroy(struct pxe_label *label)
565 * Print a label and its string members if they're defined.
567 * This is passed as a callback to the menu code for displaying each
570 static void label_print(void *data)
572 struct pxe_label *label = data;
573 const char *c = label->menu ? label->menu : label->name;
575 printf("%s:\t%s\n", label->num, c);
579 * Boot a label that specified 'localboot'. This requires that the 'localcmd'
580 * environment variable is defined. Its contents will be executed as U-Boot
581 * command. If the label specified an 'append' line, its contents will be
582 * used to overwrite the contents of the 'bootargs' environment variable prior
583 * to running 'localcmd'.
585 * Returns 1 on success or < 0 on error.
587 static int label_localboot(struct pxe_label *label)
591 localcmd = from_env("localcmd");
597 char bootargs[CONFIG_SYS_CBSIZE];
599 cli_simple_process_macros(label->append, bootargs);
600 env_set("bootargs", bootargs);
603 debug("running: %s\n", localcmd);
605 return run_command_list(localcmd, strlen(localcmd), 0);
609 * Boot according to the contents of a pxe_label.
611 * If we can't boot for any reason, we return. A successful boot never
614 * The kernel will be stored in the location given by the 'kernel_addr_r'
615 * environment variable.
617 * If the label specifies an initrd file, it will be stored in the location
618 * given by the 'ramdisk_addr_r' environment variable.
620 * If the label specifies an 'append' line, its contents will overwrite that
621 * of the 'bootargs' environment variable.
623 static int label_boot(cmd_tbl_t *cmdtp, struct pxe_label *label)
625 char *bootm_argv[] = { "bootm", NULL, NULL, NULL, NULL };
627 char mac_str[29] = "";
628 char ip_str[68] = "";
629 char *fit_addr = NULL;
637 label->attempted = 1;
639 if (label->localboot) {
640 if (label->localboot_val >= 0)
641 label_localboot(label);
645 if (label->kernel == NULL) {
646 printf("No kernel given, skipping %s\n",
652 if (get_relfile_envaddr(cmdtp, label->initrd, "ramdisk_addr_r") < 0) {
653 printf("Skipping %s for failure retrieving initrd\n",
658 bootm_argv[2] = initrd_str;
659 strncpy(bootm_argv[2], env_get("ramdisk_addr_r"), 18);
660 strcat(bootm_argv[2], ":");
661 strncat(bootm_argv[2], env_get("filesize"), 9);
664 if (get_relfile_envaddr(cmdtp, label->kernel, "kernel_addr_r") < 0) {
665 printf("Skipping %s for failure retrieving kernel\n",
670 if (label->ipappend & 0x1) {
671 sprintf(ip_str, " ip=%s:%s:%s:%s",
672 env_get("ipaddr"), env_get("serverip"),
673 env_get("gatewayip"), env_get("netmask"));
676 #ifdef CONFIG_CMD_NET
677 if (label->ipappend & 0x2) {
679 strcpy(mac_str, " BOOTIF=");
680 err = format_mac_pxe(mac_str + 8, sizeof(mac_str) - 8);
686 if ((label->ipappend & 0x3) || label->append) {
687 char bootargs[CONFIG_SYS_CBSIZE] = "";
688 char finalbootargs[CONFIG_SYS_CBSIZE];
690 if (strlen(label->append ?: "") +
691 strlen(ip_str) + strlen(mac_str) + 1 > sizeof(bootargs)) {
692 printf("bootarg overflow %zd+%zd+%zd+1 > %zd\n",
693 strlen(label->append ?: ""),
694 strlen(ip_str), strlen(mac_str),
699 strncpy(bootargs, label->append,
701 strcat(bootargs, ip_str);
702 strcat(bootargs, mac_str);
704 cli_simple_process_macros(bootargs, finalbootargs);
705 env_set("bootargs", finalbootargs);
706 printf("append: %s\n", finalbootargs);
710 bootm_argv[1] = env_get("kernel_addr_r");
711 /* for FIT, append the configuration identifier */
713 int len = strlen(bootm_argv[1]) + strlen(label->config) + 1;
715 fit_addr = malloc(len);
717 printf("malloc fail (FIT address)\n");
720 snprintf(fit_addr, len, "%s%s", bootm_argv[1], label->config);
721 bootm_argv[1] = fit_addr;
725 * fdt usage is optional:
726 * It handles the following scenarios. All scenarios are exclusive
728 * Scenario 1: If fdt_addr_r specified and "fdt" label is defined in
729 * pxe file, retrieve fdt blob from server. Pass fdt_addr_r to bootm,
730 * and adjust argc appropriately.
732 * Scenario 2: If there is an fdt_addr specified, pass it along to
733 * bootm, and adjust argc appropriately.
735 * Scenario 3: fdt blob is not available.
737 bootm_argv[3] = env_get("fdt_addr_r");
739 /* if fdt label is defined then get fdt from server */
741 char *fdtfile = NULL;
742 char *fdtfilefree = NULL;
745 fdtfile = label->fdt;
746 } else if (label->fdtdir) {
747 char *f1, *f2, *f3, *f4, *slash;
749 f1 = env_get("fdtfile");
756 * For complex cases where this code doesn't
757 * generate the correct filename, the board
758 * code should set $fdtfile during early boot,
759 * or the boot scripts should set $fdtfile
760 * before invoking "pxe" or "sysboot".
764 f3 = env_get("board");
768 len = strlen(label->fdtdir);
771 else if (label->fdtdir[len - 1] != '/')
776 len = strlen(label->fdtdir) + strlen(slash) +
777 strlen(f1) + strlen(f2) + strlen(f3) +
779 fdtfilefree = malloc(len);
781 printf("malloc fail (FDT filename)\n");
785 snprintf(fdtfilefree, len, "%s%s%s%s%s%s",
786 label->fdtdir, slash, f1, f2, f3, f4);
787 fdtfile = fdtfilefree;
791 int err = get_relfile_envaddr(cmdtp, fdtfile, "fdt_addr_r");
794 printf("Skipping %s for failure retrieving fdt\n",
799 bootm_argv[3] = NULL;
804 bootm_argv[3] = env_get("fdt_addr");
812 kernel_addr = genimg_get_kernel_addr(bootm_argv[1]);
813 buf = map_sysmem(kernel_addr, 0);
814 /* Try bootm for legacy and FIT format image */
815 if (genimg_get_format(buf) != IMAGE_FORMAT_INVALID)
816 do_bootm(cmdtp, 0, bootm_argc, bootm_argv);
817 #ifdef CONFIG_CMD_BOOTI
818 /* Try booting an AArch64 Linux kernel image */
820 do_booti(cmdtp, 0, bootm_argc, bootm_argv);
821 #elif defined(CONFIG_CMD_BOOTZ)
822 /* Try booting a Image */
824 do_bootz(cmdtp, 0, bootm_argc, bootm_argv);
835 * Tokens for the pxe file parser.
862 * A token - given by a value and a type.
866 enum token_type type;
870 * Keywords recognized.
872 static const struct token keywords[] = {
875 {"timeout", T_TIMEOUT},
876 {"default", T_DEFAULT},
877 {"prompt", T_PROMPT},
879 {"kernel", T_KERNEL},
881 {"localboot", T_LOCALBOOT},
882 {"append", T_APPEND},
883 {"initrd", T_INITRD},
884 {"include", T_INCLUDE},
885 {"devicetree", T_FDT},
887 {"devicetreedir", T_FDTDIR},
888 {"fdtdir", T_FDTDIR},
889 {"ontimeout", T_ONTIMEOUT,},
890 {"ipappend", T_IPAPPEND,},
891 {"background", T_BACKGROUND,},
896 * Since pxe(linux) files don't have a token to identify the start of a
897 * literal, we have to keep track of when we're in a state where a literal is
898 * expected vs when we're in a state a keyword is expected.
907 * get_string retrieves a string from *p and stores it as a token in
910 * get_string used for scanning both string literals and keywords.
912 * Characters from *p are copied into t-val until a character equal to
913 * delim is found, or a NUL byte is reached. If delim has the special value of
914 * ' ', any whitespace character will be used as a delimiter.
916 * If lower is unequal to 0, uppercase characters will be converted to
917 * lowercase in the result. This is useful to make keywords case
920 * The location of *p is updated to point to the first character after the end
921 * of the token - the ending delimiter.
923 * On success, the new value of t->val is returned. Memory for t->val is
924 * allocated using malloc and must be free()'d to reclaim it. If insufficient
925 * memory is available, NULL is returned.
927 static char *get_string(char **p, struct token *t, char delim, int lower)
933 * b and e both start at the beginning of the input stream.
935 * e is incremented until we find the ending delimiter, or a NUL byte
936 * is reached. Then, we take e - b to find the length of the token.
941 if ((delim == ' ' && isspace(*e)) || delim == *e)
949 * Allocate memory to hold the string, and copy it in, converting
950 * characters to lowercase if lower is != 0.
952 t->val = malloc(len + 1);
956 for (i = 0; i < len; i++, b++) {
958 t->val[i] = tolower(*b);
966 * Update *p so the caller knows where to continue scanning.
976 * Populate a keyword token with a type and value.
978 static void get_keyword(struct token *t)
982 for (i = 0; keywords[i].val; i++) {
983 if (!strcmp(t->val, keywords[i].val)) {
984 t->type = keywords[i].type;
991 * Get the next token. We have to keep track of which state we're in to know
992 * if we're looking to get a string literal or a keyword.
994 * *p is updated to point at the first character after the current token.
996 static void get_token(char **p, struct token *t, enum lex_state state)
1000 t->type = T_INVALID;
1002 /* eat non EOL whitespace */
1007 * eat comments. note that string literals can't begin with #, but
1008 * can contain a # after their first character.
1011 while (*c && *c != '\n')
1018 } else if (*c == '\0') {
1021 } else if (state == L_SLITERAL) {
1022 get_string(&c, t, '\n', 0);
1023 } else if (state == L_KEYWORD) {
1025 * when we expect a keyword, we first get the next string
1026 * token delimited by whitespace, and then check if it
1027 * matches a keyword in our keyword list. if it does, it's
1028 * converted to a keyword token of the appropriate type, and
1029 * if not, it remains a string token.
1031 get_string(&c, t, ' ', 1);
1039 * Increment *c until we get to the end of the current line, or EOF.
1041 static void eol_or_eof(char **c)
1043 while (**c && **c != '\n')
1048 * All of these parse_* functions share some common behavior.
1050 * They finish with *c pointing after the token they parse, and return 1 on
1051 * success, or < 0 on error.
1055 * Parse a string literal and store a pointer it at *dst. String literals
1056 * terminate at the end of the line.
1058 static int parse_sliteral(char **c, char **dst)
1063 get_token(c, &t, L_SLITERAL);
1065 if (t.type != T_STRING) {
1066 printf("Expected string literal: %.*s\n", (int)(*c - s), s);
1076 * Parse a base 10 (unsigned) integer and store it at *dst.
1078 static int parse_integer(char **c, int *dst)
1083 get_token(c, &t, L_SLITERAL);
1085 if (t.type != T_STRING) {
1086 printf("Expected string: %.*s\n", (int)(*c - s), s);
1090 *dst = simple_strtol(t.val, NULL, 10);
1097 static int parse_pxefile_top(cmd_tbl_t *cmdtp, char *p, unsigned long base,
1098 struct pxe_menu *cfg, int nest_level);
1101 * Parse an include statement, and retrieve and parse the file it mentions.
1103 * base should point to a location where it's safe to store the file, and
1104 * nest_level should indicate how many nested includes have occurred. For this
1105 * include, nest_level has already been incremented and doesn't need to be
1108 static int handle_include(cmd_tbl_t *cmdtp, char **c, unsigned long base,
1109 struct pxe_menu *cfg, int nest_level)
1117 err = parse_sliteral(c, &include_path);
1120 printf("Expected include path: %.*s\n",
1125 err = get_pxe_file(cmdtp, include_path, base);
1128 printf("Couldn't retrieve %s\n", include_path);
1132 buf = map_sysmem(base, 0);
1133 ret = parse_pxefile_top(cmdtp, buf, base, cfg, nest_level);
1140 * Parse lines that begin with 'menu'.
1142 * base and nest are provided to handle the 'menu include' case.
1144 * base should point to a location where it's safe to store the included file.
1146 * nest_level should be 1 when parsing the top level pxe file, 2 when parsing
1147 * a file it includes, 3 when parsing a file included by that file, and so on.
1149 static int parse_menu(cmd_tbl_t *cmdtp, char **c, struct pxe_menu *cfg,
1150 unsigned long base, int nest_level)
1156 get_token(c, &t, L_KEYWORD);
1160 err = parse_sliteral(c, &cfg->title);
1165 err = handle_include(cmdtp, c, base, cfg,
1170 err = parse_sliteral(c, &cfg->bmp);
1174 printf("Ignoring malformed menu command: %.*s\n",
1187 * Handles parsing a 'menu line' when we're parsing a label.
1189 static int parse_label_menu(char **c, struct pxe_menu *cfg,
1190 struct pxe_label *label)
1197 get_token(c, &t, L_KEYWORD);
1201 if (!cfg->default_label)
1202 cfg->default_label = strdup(label->name);
1204 if (!cfg->default_label)
1209 parse_sliteral(c, &label->menu);
1212 printf("Ignoring malformed menu command: %.*s\n",
1222 * Handles parsing a 'kernel' label.
1223 * expecting "filename" or "<fit_filename>#cfg"
1225 static int parse_label_kernel(char **c, struct pxe_label *label)
1230 err = parse_sliteral(c, &label->kernel);
1234 s = strstr(label->kernel, "#");
1238 label->config = malloc(strlen(s) + 1);
1242 strcpy(label->config, s);
1249 * Parses a label and adds it to the list of labels for a menu.
1251 * A label ends when we either get to the end of a file, or
1252 * get some input we otherwise don't have a handler defined
1256 static int parse_label(char **c, struct pxe_menu *cfg)
1261 struct pxe_label *label;
1264 label = label_create();
1268 err = parse_sliteral(c, &label->name);
1270 printf("Expected label name: %.*s\n", (int)(*c - s), s);
1271 label_destroy(label);
1275 list_add_tail(&label->list, &cfg->labels);
1279 get_token(c, &t, L_KEYWORD);
1284 err = parse_label_menu(c, cfg, label);
1289 err = parse_label_kernel(c, label);
1293 err = parse_sliteral(c, &label->append);
1296 s = strstr(label->append, "initrd=");
1300 len = (int)(strchr(s, ' ') - s);
1301 label->initrd = malloc(len + 1);
1302 strncpy(label->initrd, s, len);
1303 label->initrd[len] = '\0';
1309 err = parse_sliteral(c, &label->initrd);
1314 err = parse_sliteral(c, &label->fdt);
1319 err = parse_sliteral(c, &label->fdtdir);
1323 label->localboot = 1;
1324 err = parse_integer(c, &label->localboot_val);
1328 err = parse_integer(c, &label->ipappend);
1336 * put the token back! we don't want it - it's the end
1337 * of a label and whatever token this is, it's
1338 * something for the menu level context to handle.
1350 * This 16 comes from the limit pxelinux imposes on nested includes.
1352 * There is no reason at all we couldn't do more, but some limit helps prevent
1353 * infinite (until crash occurs) recursion if a file tries to include itself.
1355 #define MAX_NEST_LEVEL 16
1358 * Entry point for parsing a menu file. nest_level indicates how many times
1359 * we've nested in includes. It will be 1 for the top level menu file.
1361 * Returns 1 on success, < 0 on error.
1363 static int parse_pxefile_top(cmd_tbl_t *cmdtp, char *p, unsigned long base,
1364 struct pxe_menu *cfg, int nest_level)
1367 char *s, *b, *label_name;
1372 if (nest_level > MAX_NEST_LEVEL) {
1373 printf("Maximum nesting (%d) exceeded\n", MAX_NEST_LEVEL);
1380 get_token(&p, &t, L_KEYWORD);
1386 err = parse_menu(cmdtp, &p, cfg,
1387 base + ALIGN(strlen(b) + 1, 4),
1392 err = parse_integer(&p, &cfg->timeout);
1396 err = parse_label(&p, cfg);
1401 err = parse_sliteral(&p, &label_name);
1404 if (cfg->default_label)
1405 free(cfg->default_label);
1407 cfg->default_label = label_name;
1413 err = handle_include(cmdtp, &p,
1414 base + ALIGN(strlen(b), 4), cfg,
1429 printf("Ignoring unknown command: %.*s\n",
1440 * Free the memory used by a pxe_menu and its labels.
1442 static void destroy_pxe_menu(struct pxe_menu *cfg)
1444 struct list_head *pos, *n;
1445 struct pxe_label *label;
1450 if (cfg->default_label)
1451 free(cfg->default_label);
1453 list_for_each_safe(pos, n, &cfg->labels) {
1454 label = list_entry(pos, struct pxe_label, list);
1456 label_destroy(label);
1463 * Entry point for parsing a pxe file. This is only used for the top level
1466 * Returns NULL if there is an error, otherwise, returns a pointer to a
1467 * pxe_menu struct populated with the results of parsing the pxe file (and any
1468 * files it includes). The resulting pxe_menu struct can be free()'d by using
1469 * the destroy_pxe_menu() function.
1471 static struct pxe_menu *parse_pxefile(cmd_tbl_t *cmdtp, unsigned long menucfg)
1473 struct pxe_menu *cfg;
1477 cfg = malloc(sizeof(struct pxe_menu));
1482 memset(cfg, 0, sizeof(struct pxe_menu));
1484 INIT_LIST_HEAD(&cfg->labels);
1486 buf = map_sysmem(menucfg, 0);
1487 r = parse_pxefile_top(cmdtp, buf, menucfg, cfg, 1);
1491 destroy_pxe_menu(cfg);
1499 * Converts a pxe_menu struct into a menu struct for use with U-Boot's generic
1502 static struct menu *pxe_menu_to_menu(struct pxe_menu *cfg)
1504 struct pxe_label *label;
1505 struct list_head *pos;
1509 char *default_num = NULL;
1512 * Create a menu and add items for all the labels.
1514 m = menu_create(cfg->title, DIV_ROUND_UP(cfg->timeout, 10),
1515 cfg->prompt, label_print, NULL, NULL);
1520 list_for_each(pos, &cfg->labels) {
1521 label = list_entry(pos, struct pxe_label, list);
1523 sprintf(label->num, "%d", i++);
1524 if (menu_item_add(m, label->num, label) != 1) {
1528 if (cfg->default_label &&
1529 (strcmp(label->name, cfg->default_label) == 0))
1530 default_num = label->num;
1535 * After we've created items for each label in the menu, set the
1536 * menu's default label if one was specified.
1539 err = menu_default_set(m, default_num);
1541 if (err != -ENOENT) {
1546 printf("Missing default: %s\n", cfg->default_label);
1554 * Try to boot any labels we have yet to attempt to boot.
1556 static void boot_unattempted_labels(cmd_tbl_t *cmdtp, struct pxe_menu *cfg)
1558 struct list_head *pos;
1559 struct pxe_label *label;
1561 list_for_each(pos, &cfg->labels) {
1562 label = list_entry(pos, struct pxe_label, list);
1564 if (!label->attempted)
1565 label_boot(cmdtp, label);
1570 * Boot the system as prescribed by a pxe_menu.
1572 * Use the menu system to either get the user's choice or the default, based
1573 * on config or user input. If there is no default or user's choice,
1574 * attempted to boot labels in the order they were given in pxe files.
1575 * If the default or user's choice fails to boot, attempt to boot other
1576 * labels in the order they were given in pxe files.
1578 * If this function returns, there weren't any labels that successfully
1579 * booted, or the user interrupted the menu selection via ctrl+c.
1581 static void handle_pxe_menu(cmd_tbl_t *cmdtp, struct pxe_menu *cfg)
1587 #ifdef CONFIG_CMD_BMP
1588 /* display BMP if available */
1590 if (get_relfile(cmdtp, cfg->bmp, load_addr)) {
1591 run_command("cls", 0);
1592 bmp_display(load_addr,
1593 BMP_ALIGN_CENTER, BMP_ALIGN_CENTER);
1595 printf("Skipping background bmp %s for failure\n",
1601 m = pxe_menu_to_menu(cfg);
1605 err = menu_get_choice(m, &choice);
1610 * err == 1 means we got a choice back from menu_get_choice.
1612 * err == -ENOENT if the menu was setup to select the default but no
1613 * default was set. in that case, we should continue trying to boot
1614 * labels that haven't been attempted yet.
1616 * otherwise, the user interrupted or there was some other error and
1621 err = label_boot(cmdtp, choice);
1624 } else if (err != -ENOENT) {
1628 boot_unattempted_labels(cmdtp, cfg);
1631 #ifdef CONFIG_CMD_NET
1633 * Boots a system using a pxe file
1635 * Returns 0 on success, 1 on error.
1638 do_pxe_boot(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1640 unsigned long pxefile_addr_r;
1641 struct pxe_menu *cfg;
1642 char *pxefile_addr_str;
1644 do_getfile = do_get_tftp;
1647 pxefile_addr_str = from_env("pxefile_addr_r");
1648 if (!pxefile_addr_str)
1651 } else if (argc == 2) {
1652 pxefile_addr_str = argv[1];
1654 return CMD_RET_USAGE;
1657 if (strict_strtoul(pxefile_addr_str, 16, &pxefile_addr_r) < 0) {
1658 printf("Invalid pxefile address: %s\n", pxefile_addr_str);
1662 cfg = parse_pxefile(cmdtp, pxefile_addr_r);
1665 printf("Error parsing config file\n");
1669 handle_pxe_menu(cmdtp, cfg);
1671 destroy_pxe_menu(cfg);
1673 copy_filename(net_boot_file_name, "", sizeof(net_boot_file_name));
1678 static cmd_tbl_t cmd_pxe_sub[] = {
1679 U_BOOT_CMD_MKENT(get, 1, 1, do_pxe_get, "", ""),
1680 U_BOOT_CMD_MKENT(boot, 2, 1, do_pxe_boot, "", "")
1683 static int do_pxe(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1688 return CMD_RET_USAGE;
1692 /* drop initial "pxe" arg */
1696 cp = find_cmd_tbl(argv[0], cmd_pxe_sub, ARRAY_SIZE(cmd_pxe_sub));
1699 return cp->cmd(cmdtp, flag, argc, argv);
1701 return CMD_RET_USAGE;
1706 "commands to get and boot from pxe files",
1707 "get - try to retrieve a pxe file using tftp\npxe "
1708 "boot [pxefile_addr_r] - boot from the pxe file at pxefile_addr_r\n"
1713 * Boots a system using a local disk syslinux/extlinux file
1715 * Returns 0 on success, 1 on error.
1717 static int do_sysboot(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1719 unsigned long pxefile_addr_r;
1720 struct pxe_menu *cfg;
1721 char *pxefile_addr_str;
1727 if (argc > 1 && strstr(argv[1], "-p")) {
1734 return cmd_usage(cmdtp);
1737 pxefile_addr_str = from_env("pxefile_addr_r");
1738 if (!pxefile_addr_str)
1741 pxefile_addr_str = argv[4];
1745 filename = env_get("bootfile");
1748 env_set("bootfile", filename);
1751 if (strstr(argv[3], "ext2"))
1752 do_getfile = do_get_ext2;
1753 else if (strstr(argv[3], "fat"))
1754 do_getfile = do_get_fat;
1755 else if (strstr(argv[3], "any"))
1756 do_getfile = do_get_any;
1758 printf("Invalid filesystem: %s\n", argv[3]);
1761 fs_argv[1] = argv[1];
1762 fs_argv[2] = argv[2];
1764 if (strict_strtoul(pxefile_addr_str, 16, &pxefile_addr_r) < 0) {
1765 printf("Invalid pxefile address: %s\n", pxefile_addr_str);
1769 if (get_pxe_file(cmdtp, filename, pxefile_addr_r) < 0) {
1770 printf("Error reading config file\n");
1774 cfg = parse_pxefile(cmdtp, pxefile_addr_r);
1777 printf("Error parsing config file\n");
1784 handle_pxe_menu(cmdtp, cfg);
1786 destroy_pxe_menu(cfg);
1792 sysboot, 7, 1, do_sysboot,
1793 "command to get and boot from syslinux files",
1794 "[-p] <interface> <dev[:part]> <ext2|fat|any> [addr] [filename]\n"
1795 " - load and parse syslinux menu file 'filename' from ext2, fat\n"
1796 " or any filesystem on 'dev' on 'interface' to address 'addr'"