1 /* SPDX-License-Identifier: GPL-2.0+ */
7 * A note on the pxe file parser.
9 * We're parsing files that use syslinux grammar, which has a few quirks.
10 * String literals must be recognized based on context - there is no
11 * quoting or escaping support. There's also nothing to explicitly indicate
12 * when a label section completes. We deal with that by ending a label
13 * section whenever we see a line that doesn't include.
15 * As with the syslinux family, this same file format could be reused in the
16 * future for non pxe purposes. The only action it takes during parsing that
17 * would throw this off is handling of include files. It assumes we're using
18 * pxe, and does a tftp download of a file listed as an include file in the
19 * middle of the parsing operation. That could be handled by refactoring it to
20 * take a 'include file getter' function.
24 * Describes a single label given in a pxe file.
26 * Create these with the 'label_create' function given below.
28 * name - the name of the menu as given on the 'menu label' line.
29 * kernel - the path to the kernel file to use for this label.
30 * append - kernel command line to use when booting this label
31 * initrd - path to the initrd to use for this label.
32 * attempted - 0 if we haven't tried to boot this label, 1 if we have.
33 * localboot - 1 if this label specified 'localboot', 0 otherwise.
34 * list - lets these form a list, which a pxe_menu struct will hold.
50 struct list_head list;
54 * Describes a pxe menu as given via pxe files.
56 * title - the name of the menu as given by a 'menu title' line.
57 * default_label - the name of the default label, if any.
58 * bmp - the bmp file name which is displayed in background
59 * timeout - time in tenths of a second to wait for a user key-press before
60 * booting the default label.
61 * prompt - if 0, don't prompt for a choice unless the timeout period is
62 * interrupted. If 1, always prompt for a choice regardless of
64 * labels - a list of labels defined for the menu.
72 struct list_head labels;
77 extern int (*do_getfile)(cmd_tbl_t *cmdtp, const char *file_path,
79 void destroy_pxe_menu(struct pxe_menu *cfg);
80 int get_pxe_file(cmd_tbl_t *cmdtp, const char *file_path,
81 unsigned long file_addr);
82 int get_pxelinux_path(cmd_tbl_t *cmdtp, const char *file,
83 unsigned long pxefile_addr_r);
84 void handle_pxe_menu(cmd_tbl_t *cmdtp, struct pxe_menu *cfg);
85 struct pxe_menu *parse_pxefile(cmd_tbl_t *cmdtp, unsigned long menucfg);
86 int format_mac_pxe(char *outbuf, size_t outbuf_len);
88 #endif /* __PXE_UTILS_H */