1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2010-2011 Calxeda, Inc.
4 * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
16 #include <fdt_support.h>
18 #include <linux/libfdt.h>
19 #include <linux/string.h>
20 #include <linux/ctype.h>
22 #include <linux/list.h>
34 #include "pxe_utils.h"
36 #define MAX_TFTP_PATH_LEN 512
38 int pxe_get_file_size(ulong *sizep)
42 val = from_env("filesize");
46 if (strict_strtoul(val, 16, sizep) < 0)
53 * format_mac_pxe() - obtain a MAC address in the PXE format
55 * This produces a MAC-address string in the format for the current ethernet
58 * 01-aa-bb-cc-dd-ee-ff
60 * where aa-ff is the MAC address in hex
62 * @outbuf: Buffer to write string to
63 * @outbuf_len: length of buffer
64 * Return: 1 if OK, -ENOSPC if buffer is too small, -ENOENT is there is no
65 * current ethernet device
67 int format_mac_pxe(char *outbuf, size_t outbuf_len)
71 if (outbuf_len < 21) {
72 printf("outbuf is too small (%zd < 21)\n", outbuf_len);
76 if (!eth_env_get_enetaddr_by_index("eth", eth_get_dev_index(), ethaddr))
79 sprintf(outbuf, "01-%02x-%02x-%02x-%02x-%02x-%02x",
80 ethaddr[0], ethaddr[1], ethaddr[2],
81 ethaddr[3], ethaddr[4], ethaddr[5]);
87 * get_relfile() - read a file relative to the PXE file
89 * As in pxelinux, paths to files referenced from files we retrieve are
90 * relative to the location of bootfile. get_relfile takes such a path and
91 * joins it with the bootfile path to get the full path to the target file. If
92 * the bootfile path is NULL, we use file_path as is.
95 * @file_path: File path to read (relative to the PXE file)
96 * @file_addr: Address to load file to
97 * @filesizep: If not NULL, returns the file size in bytes
98 * Returns 1 for success, or < 0 on error
100 static int get_relfile(struct pxe_context *ctx, const char *file_path,
101 unsigned long file_addr, ulong *filesizep)
104 char relfile[MAX_TFTP_PATH_LEN + 1];
109 if (file_path[0] == '/' && ctx->allow_abs_path)
112 strncpy(relfile, ctx->bootdir, MAX_TFTP_PATH_LEN);
114 path_len = strlen(file_path) + strlen(relfile);
116 if (path_len > MAX_TFTP_PATH_LEN) {
117 printf("Base path too long (%s%s)\n", relfile, file_path);
119 return -ENAMETOOLONG;
122 strcat(relfile, file_path);
124 printf("Retrieving file: %s\n", relfile);
126 sprintf(addr_buf, "%lx", file_addr);
128 ret = ctx->getfile(ctx, relfile, addr_buf, &size);
130 return log_msg_ret("get", ret);
138 * get_pxe_file() - read a file
140 * The file is read and nul-terminated
143 * @file_path: File path to read (relative to the PXE file)
144 * @file_addr: Address to load file to
145 * Returns 1 for success, or < 0 on error
147 int get_pxe_file(struct pxe_context *ctx, const char *file_path,
154 err = get_relfile(ctx, file_path, file_addr, &size);
158 buf = map_sysmem(file_addr + size, 1);
165 #define PXELINUX_DIR "pxelinux.cfg/"
168 * get_pxelinux_path() - Get a file in the pxelinux.cfg/ directory
171 * @file: Filename to process (relative to pxelinux.cfg/)
172 * Returns 1 for success, -ENAMETOOLONG if the resulting path is too long.
173 * or other value < 0 on other error
175 int get_pxelinux_path(struct pxe_context *ctx, const char *file,
176 unsigned long pxefile_addr_r)
178 size_t base_len = strlen(PXELINUX_DIR);
179 char path[MAX_TFTP_PATH_LEN + 1];
181 if (base_len + strlen(file) > MAX_TFTP_PATH_LEN) {
182 printf("path (%s%s) too long, skipping\n",
184 return -ENAMETOOLONG;
187 sprintf(path, PXELINUX_DIR "%s", file);
189 return get_pxe_file(ctx, path, pxefile_addr_r);
193 * get_relfile_envaddr() - read a file to an address in an env var
195 * Wrapper to make it easier to store the file at file_path in the location
196 * specified by envaddr_name. file_path will be joined to the bootfile path,
197 * if any is specified.
200 * @file_path: File path to read (relative to the PXE file)
201 * @envaddr_name: Name of environment variable which contains the address to
203 * @filesizep: Returns the file size in bytes
204 * Returns 1 on success, -ENOENT if @envaddr_name does not exist as an
205 * environment variable, -EINVAL if its format is not valid hex, or other
206 * value < 0 on other error
208 static int get_relfile_envaddr(struct pxe_context *ctx, const char *file_path,
209 const char *envaddr_name, ulong *filesizep)
211 unsigned long file_addr;
214 envaddr = from_env(envaddr_name);
218 if (strict_strtoul(envaddr, 16, &file_addr) < 0)
221 return get_relfile(ctx, file_path, file_addr, filesizep);
225 * label_create() - crate a new PXE label
227 * Allocates memory for and initializes a pxe_label. This uses malloc, so the
228 * result must be free()'d to reclaim the memory.
230 * Returns a pointer to the label, or NULL if out of memory
232 static struct pxe_label *label_create(void)
234 struct pxe_label *label;
236 label = malloc(sizeof(struct pxe_label));
240 memset(label, 0, sizeof(struct pxe_label));
246 * label_destroy() - free the memory used by a pxe_label
248 * This frees @label itself as well as memory used by its name,
249 * kernel, config, append, initrd, fdt, fdtdir and fdtoverlay members, if
252 * So - be sure to only use dynamically allocated memory for the members of
253 * the pxe_label struct, unless you want to clean it up first. These are
254 * currently only created by the pxe file parsing code.
256 * @label: Label to free
258 static void label_destroy(struct pxe_label *label)
261 free(label->kernel_label);
268 free(label->fdtoverlays);
273 * label_print() - Print a label and its string members if they're defined
275 * This is passed as a callback to the menu code for displaying each
278 * @data: Label to print (is cast to struct pxe_label *)
280 static void label_print(void *data)
282 struct pxe_label *label = data;
283 const char *c = label->menu ? label->menu : label->name;
285 printf("%s:\t%s\n", label->num, c);
289 * label_localboot() - Boot a label that specified 'localboot'
291 * This requires that the 'localcmd' environment variable is defined. Its
292 * contents will be executed as U-Boot commands. If the label specified an
293 * 'append' line, its contents will be used to overwrite the contents of the
294 * 'bootargs' environment variable prior to running 'localcmd'.
296 * @label: Label to process
297 * Returns 1 on success or < 0 on error
299 static int label_localboot(struct pxe_label *label)
303 localcmd = from_env("localcmd");
308 char bootargs[CONFIG_SYS_CBSIZE];
310 cli_simple_process_macros(label->append, bootargs,
312 env_set("bootargs", bootargs);
315 debug("running: %s\n", localcmd);
317 return run_command_list(localcmd, strlen(localcmd), 0);
321 * label_boot_kaslrseed generate kaslrseed from hw rng
324 static void label_boot_kaslrseed(void)
328 struct fdt_header *working_fdt;
335 /* Get the main fdt and map it */
336 fdt_addr = hextoul(env_get("fdt_addr_r"), NULL);
337 working_fdt = map_sysmem(fdt_addr, 0);
338 err = fdt_check_header(working_fdt);
342 /* add extra size for holding kaslr-seed */
343 /* err is new fdt size, 0 or negtive */
344 err = fdt_shrink_to_minimum(working_fdt, 512);
348 if (uclass_get_device(UCLASS_RNG, 0, &dev) || !dev) {
349 printf("No RNG device\n");
353 nodeoffset = fdt_find_or_add_subnode(working_fdt, 0, "chosen");
354 if (nodeoffset < 0) {
355 printf("Reading chosen node failed\n");
361 printf("Out of memory\n");
365 if (dm_rng_read(dev, buf, n)) {
366 printf("Reading RNG failed\n");
370 err = fdt_setprop(working_fdt, nodeoffset, "kaslr-seed", buf, sizeof(buf));
372 printf("Unable to set kaslr-seed on chosen node: %s\n", fdt_strerror(err));
382 * label_boot_fdtoverlay() - Loads fdt overlays specified in 'fdtoverlays'
383 * or 'devicetree-overlay'
386 * @label: Label to process
388 #ifdef CONFIG_OF_LIBFDT_OVERLAY
389 static void label_boot_fdtoverlay(struct pxe_context *ctx,
390 struct pxe_label *label)
392 char *fdtoverlay = label->fdtoverlays;
393 struct fdt_header *working_fdt;
394 char *fdtoverlay_addr_env;
395 ulong fdtoverlay_addr;
399 /* Get the main fdt and map it */
400 fdt_addr = hextoul(env_get("fdt_addr_r"), NULL);
401 working_fdt = map_sysmem(fdt_addr, 0);
402 err = fdt_check_header(working_fdt);
406 /* Get the specific overlay loading address */
407 fdtoverlay_addr_env = env_get("fdtoverlay_addr_r");
408 if (!fdtoverlay_addr_env) {
409 printf("Invalid fdtoverlay_addr_r for loading overlays\n");
413 fdtoverlay_addr = hextoul(fdtoverlay_addr_env, NULL);
415 /* Cycle over the overlay files and apply them in order */
417 struct fdt_header *blob;
422 /* Drop leading spaces */
423 while (*fdtoverlay == ' ')
426 /* Copy a single filename if multiple provided */
427 end = strstr(fdtoverlay, " ");
429 len = (int)(end - fdtoverlay);
430 overlayfile = malloc(len + 1);
431 strncpy(overlayfile, fdtoverlay, len);
432 overlayfile[len] = '\0';
434 overlayfile = fdtoverlay;
436 if (!strlen(overlayfile))
439 /* Load overlay file */
440 err = get_relfile_envaddr(ctx, overlayfile, "fdtoverlay_addr_r",
443 printf("Failed loading overlay %s\n", overlayfile);
447 /* Resize main fdt */
448 fdt_shrink_to_minimum(working_fdt, 8192);
450 blob = map_sysmem(fdtoverlay_addr, 0);
451 err = fdt_check_header(blob);
453 printf("Invalid overlay %s, skipping\n",
458 err = fdt_overlay_apply_verbose(working_fdt, blob);
460 printf("Failed to apply overlay %s, skipping\n",
468 } while ((fdtoverlay = strstr(fdtoverlay, " ")));
473 * label_boot() - Boot according to the contents of a pxe_label
475 * If we can't boot for any reason, we return. A successful boot never
478 * The kernel will be stored in the location given by the 'kernel_addr_r'
479 * environment variable.
481 * If the label specifies an initrd file, it will be stored in the location
482 * given by the 'ramdisk_addr_r' environment variable.
484 * If the label specifies an 'append' line, its contents will overwrite that
485 * of the 'bootargs' environment variable.
488 * @label: Label to process
489 * Returns does not return on success, otherwise returns 0 if a localboot
490 * label was processed, or 1 on error
492 static int label_boot(struct pxe_context *ctx, struct pxe_label *label)
494 char *bootm_argv[] = { "bootm", NULL, NULL, NULL, NULL };
495 char *zboot_argv[] = { "zboot", NULL, "0", NULL, NULL };
496 char *kernel_addr = NULL;
497 char *initrd_addr_str = NULL;
498 char initrd_filesize[10];
500 char mac_str[29] = "";
501 char ip_str[68] = "";
502 char *fit_addr = NULL;
511 label->attempted = 1;
513 if (label->localboot) {
514 if (label->localboot_val >= 0)
515 label_localboot(label);
519 if (!label->kernel) {
520 printf("No kernel given, skipping %s\n",
525 if (get_relfile_envaddr(ctx, label->kernel, "kernel_addr_r",
527 printf("Skipping %s for failure retrieving kernel\n",
532 kernel_addr = env_get("kernel_addr_r");
533 /* for FIT, append the configuration identifier */
535 int len = strlen(kernel_addr) + strlen(label->config) + 1;
537 fit_addr = malloc(len);
539 printf("malloc fail (FIT address)\n");
542 snprintf(fit_addr, len, "%s%s", kernel_addr, label->config);
543 kernel_addr = fit_addr;
546 /* For FIT, the label can be identical to kernel one */
547 if (label->initrd && !strcmp(label->kernel_label, label->initrd)) {
548 initrd_addr_str = kernel_addr;
549 } else if (label->initrd) {
551 if (get_relfile_envaddr(ctx, label->initrd, "ramdisk_addr_r",
553 printf("Skipping %s for failure retrieving initrd\n",
558 initrd_addr_str = env_get("ramdisk_addr_r");
559 size = snprintf(initrd_str, sizeof(initrd_str), "%s:%lx",
560 initrd_addr_str, size);
561 if (size >= sizeof(initrd_str))
565 if (label->ipappend & 0x1) {
566 sprintf(ip_str, " ip=%s:%s:%s:%s",
567 env_get("ipaddr"), env_get("serverip"),
568 env_get("gatewayip"), env_get("netmask"));
571 if (IS_ENABLED(CONFIG_CMD_NET)) {
572 if (label->ipappend & 0x2) {
575 strcpy(mac_str, " BOOTIF=");
576 err = format_mac_pxe(mac_str + 8, sizeof(mac_str) - 8);
582 if ((label->ipappend & 0x3) || label->append) {
583 char bootargs[CONFIG_SYS_CBSIZE] = "";
584 char finalbootargs[CONFIG_SYS_CBSIZE];
586 if (strlen(label->append ?: "") +
587 strlen(ip_str) + strlen(mac_str) + 1 > sizeof(bootargs)) {
588 printf("bootarg overflow %zd+%zd+%zd+1 > %zd\n",
589 strlen(label->append ?: ""),
590 strlen(ip_str), strlen(mac_str),
596 strncpy(bootargs, label->append, sizeof(bootargs));
598 strcat(bootargs, ip_str);
599 strcat(bootargs, mac_str);
601 cli_simple_process_macros(bootargs, finalbootargs,
602 sizeof(finalbootargs));
603 env_set("bootargs", finalbootargs);
604 printf("append: %s\n", finalbootargs);
608 * fdt usage is optional:
609 * It handles the following scenarios.
611 * Scenario 1: If fdt_addr_r specified and "fdt" or "fdtdir" label is
612 * defined in pxe file, retrieve fdt blob from server. Pass fdt_addr_r to
613 * bootm, and adjust argc appropriately.
615 * If retrieve fails and no exact fdt blob is specified in pxe file with
616 * "fdt" label, try Scenario 2.
618 * Scenario 2: If there is an fdt_addr specified, pass it along to
619 * bootm, and adjust argc appropriately.
621 * Scenario 3: fdt blob is not available.
623 bootm_argv[3] = env_get("fdt_addr_r");
625 /* For FIT, the label can be identical to kernel one */
626 if (label->fdt && !strcmp(label->kernel_label, label->fdt)) {
627 bootm_argv[3] = kernel_addr;
628 /* if fdt label is defined then get fdt from server */
629 } else if (bootm_argv[3]) {
630 char *fdtfile = NULL;
631 char *fdtfilefree = NULL;
634 fdtfile = label->fdt;
635 } else if (label->fdtdir) {
636 char *f1, *f2, *f3, *f4, *slash;
638 f1 = env_get("fdtfile");
645 * For complex cases where this code doesn't
646 * generate the correct filename, the board
647 * code should set $fdtfile during early boot,
648 * or the boot scripts should set $fdtfile
649 * before invoking "pxe" or "sysboot".
653 f3 = env_get("board");
665 len = strlen(label->fdtdir);
668 else if (label->fdtdir[len - 1] != '/')
673 len = strlen(label->fdtdir) + strlen(slash) +
674 strlen(f1) + strlen(f2) + strlen(f3) +
676 fdtfilefree = malloc(len);
678 printf("malloc fail (FDT filename)\n");
682 snprintf(fdtfilefree, len, "%s%s%s%s%s%s",
683 label->fdtdir, slash, f1, f2, f3, f4);
684 fdtfile = fdtfilefree;
688 int err = get_relfile_envaddr(ctx, fdtfile,
693 bootm_argv[3] = NULL;
696 printf("Skipping %s for failure retrieving FDT\n",
702 if (label->kaslrseed)
703 label_boot_kaslrseed();
705 #ifdef CONFIG_OF_LIBFDT_OVERLAY
706 if (label->fdtoverlays)
707 label_boot_fdtoverlay(ctx, label);
710 bootm_argv[3] = NULL;
714 bootm_argv[1] = kernel_addr;
715 zboot_argv[1] = kernel_addr;
717 if (initrd_addr_str) {
718 bootm_argv[2] = initrd_str;
721 zboot_argv[3] = initrd_addr_str;
722 zboot_argv[4] = initrd_filesize;
727 bootm_argv[3] = env_get("fdt_addr");
735 kernel_addr_r = genimg_get_kernel_addr(kernel_addr);
736 buf = map_sysmem(kernel_addr_r, 0);
737 /* Try bootm for legacy and FIT format image */
738 if (genimg_get_format(buf) != IMAGE_FORMAT_INVALID &&
739 IS_ENABLED(CONFIG_CMD_BOOTM))
740 do_bootm(ctx->cmdtp, 0, bootm_argc, bootm_argv);
741 /* Try booting an AArch64 Linux kernel image */
742 else if (IS_ENABLED(CONFIG_CMD_BOOTI))
743 do_booti(ctx->cmdtp, 0, bootm_argc, bootm_argv);
744 /* Try booting a Image */
745 else if (IS_ENABLED(CONFIG_CMD_BOOTZ))
746 do_bootz(ctx->cmdtp, 0, bootm_argc, bootm_argv);
747 /* Try booting an x86_64 Linux kernel image */
748 else if (IS_ENABLED(CONFIG_CMD_ZBOOT))
749 do_zboot_parent(ctx->cmdtp, 0, zboot_argc, zboot_argv, NULL);
759 /** enum token_type - Tokens for the pxe file parser */
786 /** struct token - token - given by a value and a type */
789 enum token_type type;
792 /* Keywords recognized */
793 static const struct token keywords[] = {
796 {"timeout", T_TIMEOUT},
797 {"default", T_DEFAULT},
798 {"prompt", T_PROMPT},
800 {"kernel", T_KERNEL},
802 {"localboot", T_LOCALBOOT},
803 {"append", T_APPEND},
804 {"initrd", T_INITRD},
805 {"include", T_INCLUDE},
806 {"devicetree", T_FDT},
808 {"devicetreedir", T_FDTDIR},
809 {"fdtdir", T_FDTDIR},
810 {"fdtoverlays", T_FDTOVERLAYS},
811 {"devicetree-overlay", T_FDTOVERLAYS},
812 {"ontimeout", T_ONTIMEOUT,},
813 {"ipappend", T_IPAPPEND,},
814 {"background", T_BACKGROUND,},
815 {"kaslrseed", T_KASLRSEED,},
820 * enum lex_state - lexer state
822 * Since pxe(linux) files don't have a token to identify the start of a
823 * literal, we have to keep track of when we're in a state where a literal is
824 * expected vs when we're in a state a keyword is expected.
833 * get_string() - retrieves a string from *p and stores it as a token in *t.
835 * This is used for scanning both string literals and keywords.
837 * Characters from *p are copied into t-val until a character equal to
838 * delim is found, or a NUL byte is reached. If delim has the special value of
839 * ' ', any whitespace character will be used as a delimiter.
841 * If lower is unequal to 0, uppercase characters will be converted to
842 * lowercase in the result. This is useful to make keywords case
845 * The location of *p is updated to point to the first character after the end
846 * of the token - the ending delimiter.
848 * Memory for t->val is allocated using malloc and must be free()'d to reclaim
851 * @p: Points to a pointer to the current position in the input being processed.
852 * Updated to point at the first character after the current token
853 * @t: Pointers to a token to fill in
854 * @delim: Delimiter character to look for, either newline or space
855 * @lower: true to convert the string to lower case when storing
856 * Returns the new value of t->val, on success, NULL if out of memory
858 static char *get_string(char **p, struct token *t, char delim, int lower)
864 * b and e both start at the beginning of the input stream.
866 * e is incremented until we find the ending delimiter, or a NUL byte
867 * is reached. Then, we take e - b to find the length of the token.
872 if ((delim == ' ' && isspace(*e)) || delim == *e)
880 * Allocate memory to hold the string, and copy it in, converting
881 * characters to lowercase if lower is != 0.
883 t->val = malloc(len + 1);
887 for (i = 0; i < len; i++, b++) {
889 t->val[i] = tolower(*b);
896 /* Update *p so the caller knows where to continue scanning */
904 * get_keyword() - Populate a keyword token with a type and value
906 * Updates the ->type field based on the keyword string in @val
907 * @t: Token to populate
909 static void get_keyword(struct token *t)
913 for (i = 0; keywords[i].val; i++) {
914 if (!strcmp(t->val, keywords[i].val)) {
915 t->type = keywords[i].type;
922 * get_token() - Get the next token
924 * We have to keep track of which state we're in to know if we're looking to get
925 * a string literal or a keyword.
927 * @p: Points to a pointer to the current position in the input being processed.
928 * Updated to point at the first character after the current token
930 static void get_token(char **p, struct token *t, enum lex_state state)
936 /* eat non EOL whitespace */
941 * eat comments. note that string literals can't begin with #, but
942 * can contain a # after their first character.
945 while (*c && *c != '\n')
952 } else if (*c == '\0') {
955 } else if (state == L_SLITERAL) {
956 get_string(&c, t, '\n', 0);
957 } else if (state == L_KEYWORD) {
959 * when we expect a keyword, we first get the next string
960 * token delimited by whitespace, and then check if it
961 * matches a keyword in our keyword list. if it does, it's
962 * converted to a keyword token of the appropriate type, and
963 * if not, it remains a string token.
965 get_string(&c, t, ' ', 1);
973 * eol_or_eof() - Find end of line
975 * Increment *c until we get to the end of the current line, or EOF
977 * @c: Points to a pointer to the current position in the input being processed.
978 * Updated to point at the first character after the current token
980 static void eol_or_eof(char **c)
982 while (**c && **c != '\n')
987 * All of these parse_* functions share some common behavior.
989 * They finish with *c pointing after the token they parse, and return 1 on
990 * success, or < 0 on error.
994 * Parse a string literal and store a pointer it at *dst. String literals
995 * terminate at the end of the line.
997 static int parse_sliteral(char **c, char **dst)
1002 get_token(c, &t, L_SLITERAL);
1004 if (t.type != T_STRING) {
1005 printf("Expected string literal: %.*s\n", (int)(*c - s), s);
1015 * Parse a base 10 (unsigned) integer and store it at *dst.
1017 static int parse_integer(char **c, int *dst)
1022 get_token(c, &t, L_SLITERAL);
1023 if (t.type != T_STRING) {
1024 printf("Expected string: %.*s\n", (int)(*c - s), s);
1028 *dst = simple_strtol(t.val, NULL, 10);
1035 static int parse_pxefile_top(struct pxe_context *ctx, char *p, ulong base,
1036 struct pxe_menu *cfg, int nest_level);
1039 * Parse an include statement, and retrieve and parse the file it mentions.
1041 * base should point to a location where it's safe to store the file, and
1042 * nest_level should indicate how many nested includes have occurred. For this
1043 * include, nest_level has already been incremented and doesn't need to be
1046 static int handle_include(struct pxe_context *ctx, char **c, unsigned long base,
1047 struct pxe_menu *cfg, int nest_level)
1055 err = parse_sliteral(c, &include_path);
1057 printf("Expected include path: %.*s\n", (int)(*c - s), s);
1061 err = get_pxe_file(ctx, include_path, base);
1063 printf("Couldn't retrieve %s\n", include_path);
1067 buf = map_sysmem(base, 0);
1068 ret = parse_pxefile_top(ctx, buf, base, cfg, nest_level);
1075 * Parse lines that begin with 'menu'.
1077 * base and nest are provided to handle the 'menu include' case.
1079 * base should point to a location where it's safe to store the included file.
1081 * nest_level should be 1 when parsing the top level pxe file, 2 when parsing
1082 * a file it includes, 3 when parsing a file included by that file, and so on.
1084 static int parse_menu(struct pxe_context *ctx, char **c, struct pxe_menu *cfg,
1085 unsigned long base, int nest_level)
1091 get_token(c, &t, L_KEYWORD);
1095 err = parse_sliteral(c, &cfg->title);
1100 err = handle_include(ctx, c, base, cfg, nest_level + 1);
1104 err = parse_sliteral(c, &cfg->bmp);
1108 printf("Ignoring malformed menu command: %.*s\n",
1120 * Handles parsing a 'menu line' when we're parsing a label.
1122 static int parse_label_menu(char **c, struct pxe_menu *cfg,
1123 struct pxe_label *label)
1130 get_token(c, &t, L_KEYWORD);
1134 if (!cfg->default_label)
1135 cfg->default_label = strdup(label->name);
1137 if (!cfg->default_label)
1142 parse_sliteral(c, &label->menu);
1145 printf("Ignoring malformed menu command: %.*s\n",
1155 * Handles parsing a 'kernel' label.
1156 * expecting "filename" or "<fit_filename>#cfg"
1158 static int parse_label_kernel(char **c, struct pxe_label *label)
1163 err = parse_sliteral(c, &label->kernel);
1167 /* copy the kernel label to compare with FDT / INITRD when FIT is used */
1168 label->kernel_label = strdup(label->kernel);
1169 if (!label->kernel_label)
1172 s = strstr(label->kernel, "#");
1176 label->config = strdup(s);
1186 * Parses a label and adds it to the list of labels for a menu.
1188 * A label ends when we either get to the end of a file, or
1189 * get some input we otherwise don't have a handler defined
1193 static int parse_label(char **c, struct pxe_menu *cfg)
1198 struct pxe_label *label;
1201 label = label_create();
1205 err = parse_sliteral(c, &label->name);
1207 printf("Expected label name: %.*s\n", (int)(*c - s), s);
1208 label_destroy(label);
1212 list_add_tail(&label->list, &cfg->labels);
1216 get_token(c, &t, L_KEYWORD);
1221 err = parse_label_menu(c, cfg, label);
1226 err = parse_label_kernel(c, label);
1230 err = parse_sliteral(c, &label->append);
1233 s = strstr(label->append, "initrd=");
1237 len = (int)(strchr(s, ' ') - s);
1238 label->initrd = malloc(len + 1);
1239 strncpy(label->initrd, s, len);
1240 label->initrd[len] = '\0';
1246 err = parse_sliteral(c, &label->initrd);
1251 err = parse_sliteral(c, &label->fdt);
1256 err = parse_sliteral(c, &label->fdtdir);
1260 if (!label->fdtoverlays)
1261 err = parse_sliteral(c, &label->fdtoverlays);
1265 label->localboot = 1;
1266 err = parse_integer(c, &label->localboot_val);
1270 err = parse_integer(c, &label->ipappend);
1274 label->kaslrseed = 1;
1282 * put the token back! we don't want it - it's the end
1283 * of a label and whatever token this is, it's
1284 * something for the menu level context to handle.
1296 * This 16 comes from the limit pxelinux imposes on nested includes.
1298 * There is no reason at all we couldn't do more, but some limit helps prevent
1299 * infinite (until crash occurs) recursion if a file tries to include itself.
1301 #define MAX_NEST_LEVEL 16
1304 * Entry point for parsing a menu file. nest_level indicates how many times
1305 * we've nested in includes. It will be 1 for the top level menu file.
1307 * Returns 1 on success, < 0 on error.
1309 static int parse_pxefile_top(struct pxe_context *ctx, char *p, unsigned long base,
1310 struct pxe_menu *cfg, int nest_level)
1313 char *s, *b, *label_name;
1318 if (nest_level > MAX_NEST_LEVEL) {
1319 printf("Maximum nesting (%d) exceeded\n", MAX_NEST_LEVEL);
1326 get_token(&p, &t, L_KEYWORD);
1332 err = parse_menu(ctx, &p, cfg,
1333 base + ALIGN(strlen(b) + 1, 4),
1338 err = parse_integer(&p, &cfg->timeout);
1342 err = parse_label(&p, cfg);
1347 err = parse_sliteral(&p, &label_name);
1350 if (cfg->default_label)
1351 free(cfg->default_label);
1353 cfg->default_label = label_name;
1359 err = handle_include(ctx, &p,
1360 base + ALIGN(strlen(b), 4), cfg,
1365 err = parse_integer(&p, &cfg->prompt);
1366 // Do not fail if prompt configuration is undefined
1378 printf("Ignoring unknown command: %.*s\n",
1390 void destroy_pxe_menu(struct pxe_menu *cfg)
1392 struct list_head *pos, *n;
1393 struct pxe_label *label;
1396 free(cfg->default_label);
1398 list_for_each_safe(pos, n, &cfg->labels) {
1399 label = list_entry(pos, struct pxe_label, list);
1401 label_destroy(label);
1407 struct pxe_menu *parse_pxefile(struct pxe_context *ctx, unsigned long menucfg)
1409 struct pxe_menu *cfg;
1413 cfg = malloc(sizeof(struct pxe_menu));
1417 memset(cfg, 0, sizeof(struct pxe_menu));
1419 INIT_LIST_HEAD(&cfg->labels);
1421 buf = map_sysmem(menucfg, 0);
1422 r = parse_pxefile_top(ctx, buf, menucfg, cfg, 1);
1425 destroy_pxe_menu(cfg);
1433 * Converts a pxe_menu struct into a menu struct for use with U-Boot's generic
1436 static struct menu *pxe_menu_to_menu(struct pxe_menu *cfg)
1438 struct pxe_label *label;
1439 struct list_head *pos;
1441 char *label_override;
1444 char *default_num = NULL;
1445 char *override_num = NULL;
1448 * Create a menu and add items for all the labels.
1450 m = menu_create(cfg->title, DIV_ROUND_UP(cfg->timeout, 10),
1451 cfg->prompt, NULL, label_print, NULL, NULL);
1455 label_override = env_get("pxe_label_override");
1457 list_for_each(pos, &cfg->labels) {
1458 label = list_entry(pos, struct pxe_label, list);
1460 sprintf(label->num, "%d", i++);
1461 if (menu_item_add(m, label->num, label) != 1) {
1465 if (cfg->default_label &&
1466 (strcmp(label->name, cfg->default_label) == 0))
1467 default_num = label->num;
1468 if (label_override && !strcmp(label->name, label_override))
1469 override_num = label->num;
1473 if (label_override) {
1475 default_num = override_num;
1477 printf("Missing override pxe label: %s\n",
1482 * After we've created items for each label in the menu, set the
1483 * menu's default label if one was specified.
1486 err = menu_default_set(m, default_num);
1488 if (err != -ENOENT) {
1493 printf("Missing default: %s\n", cfg->default_label);
1501 * Try to boot any labels we have yet to attempt to boot.
1503 static void boot_unattempted_labels(struct pxe_context *ctx,
1504 struct pxe_menu *cfg)
1506 struct list_head *pos;
1507 struct pxe_label *label;
1509 list_for_each(pos, &cfg->labels) {
1510 label = list_entry(pos, struct pxe_label, list);
1512 if (!label->attempted)
1513 label_boot(ctx, label);
1517 void handle_pxe_menu(struct pxe_context *ctx, struct pxe_menu *cfg)
1523 if (IS_ENABLED(CONFIG_CMD_BMP)) {
1524 /* display BMP if available */
1526 if (get_relfile(ctx, cfg->bmp, image_load_addr, NULL)) {
1527 #if defined(CONFIG_VIDEO)
1528 struct udevice *dev;
1530 err = uclass_first_device_err(UCLASS_VIDEO, &dev);
1534 bmp_display(image_load_addr,
1535 BMP_ALIGN_CENTER, BMP_ALIGN_CENTER);
1537 printf("Skipping background bmp %s for failure\n",
1543 m = pxe_menu_to_menu(cfg);
1547 err = menu_get_choice(m, &choice);
1551 * err == 1 means we got a choice back from menu_get_choice.
1553 * err == -ENOENT if the menu was setup to select the default but no
1554 * default was set. in that case, we should continue trying to boot
1555 * labels that haven't been attempted yet.
1557 * otherwise, the user interrupted or there was some other error and
1562 err = label_boot(ctx, choice);
1565 } else if (err != -ENOENT) {
1569 boot_unattempted_labels(ctx, cfg);
1572 int pxe_setup_ctx(struct pxe_context *ctx, struct cmd_tbl *cmdtp,
1573 pxe_getfile_func getfile, void *userdata,
1574 bool allow_abs_path, const char *bootfile)
1576 const char *last_slash;
1577 size_t path_len = 0;
1579 memset(ctx, '\0', sizeof(*ctx));
1581 ctx->getfile = getfile;
1582 ctx->userdata = userdata;
1583 ctx->allow_abs_path = allow_abs_path;
1585 /* figure out the boot directory, if there is one */
1586 if (bootfile && strlen(bootfile) >= MAX_TFTP_PATH_LEN)
1588 ctx->bootdir = strdup(bootfile ? bootfile : "");
1593 last_slash = strrchr(bootfile, '/');
1595 path_len = (last_slash - bootfile) + 1;
1597 ctx->bootdir[path_len] = '\0';
1602 void pxe_destroy_ctx(struct pxe_context *ctx)
1607 int pxe_process(struct pxe_context *ctx, ulong pxefile_addr_r, bool prompt)
1609 struct pxe_menu *cfg;
1611 cfg = parse_pxefile(ctx, pxefile_addr_r);
1613 printf("Error parsing config file\n");
1620 handle_pxe_menu(ctx, cfg);
1622 destroy_pxe_menu(cfg);