mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-12 06:12:58 +00:00
18c2582183
Add "zboot" command to the list of supported boot in the label_boot function. Signed-off-by: Kory Maincent <kory.maincent@bootlin.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> [bmeng: add component tags in the summary] Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
1471 lines
32 KiB
C
1471 lines
32 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2010-2011 Calxeda, Inc.
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* Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
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*/
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#include <common.h>
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#include <command.h>
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#include <env.h>
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#include <image.h>
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#include <log.h>
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#include <malloc.h>
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#include <mapmem.h>
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#include <lcd.h>
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#include <net.h>
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#include <fdt_support.h>
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#include <linux/libfdt.h>
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#include <linux/string.h>
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#include <linux/ctype.h>
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#include <errno.h>
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#include <linux/list.h>
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#include <splash.h>
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#include <asm/io.h>
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#include "menu.h"
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#include "cli.h"
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#include "pxe_utils.h"
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#define MAX_TFTP_PATH_LEN 512
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bool is_pxe;
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/*
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* Convert an ethaddr from the environment to the format used by pxelinux
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* filenames based on mac addresses. Convert's ':' to '-', and adds "01-" to
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* the beginning of the ethernet address to indicate a hardware type of
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* Ethernet. Also converts uppercase hex characters into lowercase, to match
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* pxelinux's behavior.
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*
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* Returns 1 for success, -ENOENT if 'ethaddr' is undefined in the
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* environment, or some other value < 0 on error.
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*/
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int format_mac_pxe(char *outbuf, size_t outbuf_len)
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{
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uchar ethaddr[6];
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if (outbuf_len < 21) {
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printf("outbuf is too small (%zd < 21)\n", outbuf_len);
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return -EINVAL;
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}
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if (!eth_env_get_enetaddr_by_index("eth", eth_get_dev_index(), ethaddr))
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return -ENOENT;
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sprintf(outbuf, "01-%02x-%02x-%02x-%02x-%02x-%02x",
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ethaddr[0], ethaddr[1], ethaddr[2],
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ethaddr[3], ethaddr[4], ethaddr[5]);
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return 1;
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}
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/*
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* Returns the directory the file specified in the bootfile env variable is
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* in. If bootfile isn't defined in the environment, return NULL, which should
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* be interpreted as "don't prepend anything to paths".
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*/
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static int get_bootfile_path(const char *file_path, char *bootfile_path,
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size_t bootfile_path_size)
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{
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char *bootfile, *last_slash;
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size_t path_len = 0;
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/* Only syslinux allows absolute paths */
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if (file_path[0] == '/' && !is_pxe)
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goto ret;
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bootfile = from_env("bootfile");
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if (!bootfile)
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goto ret;
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last_slash = strrchr(bootfile, '/');
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if (!last_slash)
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goto ret;
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path_len = (last_slash - bootfile) + 1;
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if (bootfile_path_size < path_len) {
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printf("bootfile_path too small. (%zd < %zd)\n",
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bootfile_path_size, path_len);
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return -1;
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}
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strncpy(bootfile_path, bootfile, path_len);
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ret:
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bootfile_path[path_len] = '\0';
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return 1;
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}
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int (*do_getfile)(struct cmd_tbl *cmdtp, const char *file_path,
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char *file_addr);
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/*
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* As in pxelinux, paths to files referenced from files we retrieve are
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* relative to the location of bootfile. get_relfile takes such a path and
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* joins it with the bootfile path to get the full path to the target file. If
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* the bootfile path is NULL, we use file_path as is.
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*
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* Returns 1 for success, or < 0 on error.
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*/
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static int get_relfile(struct cmd_tbl *cmdtp, const char *file_path,
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unsigned long file_addr)
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{
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size_t path_len;
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char relfile[MAX_TFTP_PATH_LEN + 1];
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char addr_buf[18];
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int err;
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err = get_bootfile_path(file_path, relfile, sizeof(relfile));
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if (err < 0)
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return err;
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path_len = strlen(file_path);
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path_len += strlen(relfile);
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if (path_len > MAX_TFTP_PATH_LEN) {
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printf("Base path too long (%s%s)\n", relfile, file_path);
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return -ENAMETOOLONG;
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}
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strcat(relfile, file_path);
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printf("Retrieving file: %s\n", relfile);
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sprintf(addr_buf, "%lx", file_addr);
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return do_getfile(cmdtp, relfile, addr_buf);
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}
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/*
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* Retrieve the file at 'file_path' to the locate given by 'file_addr'. If
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* 'bootfile' was specified in the environment, the path to bootfile will be
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* prepended to 'file_path' and the resulting path will be used.
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*
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* Returns 1 on success, or < 0 for error.
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*/
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int get_pxe_file(struct cmd_tbl *cmdtp, const char *file_path,
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unsigned long file_addr)
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{
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unsigned long config_file_size;
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char *tftp_filesize;
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int err;
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char *buf;
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err = get_relfile(cmdtp, file_path, file_addr);
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if (err < 0)
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return err;
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/*
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* the file comes without a NUL byte at the end, so find out its size
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* and add the NUL byte.
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*/
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tftp_filesize = from_env("filesize");
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if (!tftp_filesize)
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return -ENOENT;
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if (strict_strtoul(tftp_filesize, 16, &config_file_size) < 0)
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return -EINVAL;
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buf = map_sysmem(file_addr + config_file_size, 1);
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*buf = '\0';
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unmap_sysmem(buf);
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return 1;
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}
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#define PXELINUX_DIR "pxelinux.cfg/"
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/*
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* Retrieves a file in the 'pxelinux.cfg' folder. Since this uses get_pxe_file
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* to do the hard work, the location of the 'pxelinux.cfg' folder is generated
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* from the bootfile path, as described above.
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*
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* Returns 1 on success or < 0 on error.
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*/
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int get_pxelinux_path(struct cmd_tbl *cmdtp, const char *file,
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unsigned long pxefile_addr_r)
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{
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size_t base_len = strlen(PXELINUX_DIR);
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char path[MAX_TFTP_PATH_LEN + 1];
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if (base_len + strlen(file) > MAX_TFTP_PATH_LEN) {
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printf("path (%s%s) too long, skipping\n",
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PXELINUX_DIR, file);
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return -ENAMETOOLONG;
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}
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sprintf(path, PXELINUX_DIR "%s", file);
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return get_pxe_file(cmdtp, path, pxefile_addr_r);
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}
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/*
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* Wrapper to make it easier to store the file at file_path in the location
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* specified by envaddr_name. file_path will be joined to the bootfile path,
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* if any is specified.
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*
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* Returns 1 on success or < 0 on error.
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*/
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static int get_relfile_envaddr(struct cmd_tbl *cmdtp, const char *file_path,
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const char *envaddr_name)
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{
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unsigned long file_addr;
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char *envaddr;
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envaddr = from_env(envaddr_name);
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if (!envaddr)
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return -ENOENT;
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if (strict_strtoul(envaddr, 16, &file_addr) < 0)
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return -EINVAL;
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return get_relfile(cmdtp, file_path, file_addr);
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}
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/*
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* Allocates memory for and initializes a pxe_label. This uses malloc, so the
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* result must be free()'d to reclaim the memory.
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*
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* Returns NULL if malloc fails.
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*/
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static struct pxe_label *label_create(void)
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{
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struct pxe_label *label;
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label = malloc(sizeof(struct pxe_label));
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if (!label)
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return NULL;
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memset(label, 0, sizeof(struct pxe_label));
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return label;
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}
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/*
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* Free the memory used by a pxe_label, including that used by its name,
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* kernel, append and initrd members, if they're non NULL.
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*
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* So - be sure to only use dynamically allocated memory for the members of
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* the pxe_label struct, unless you want to clean it up first. These are
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* currently only created by the pxe file parsing code.
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*/
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static void label_destroy(struct pxe_label *label)
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{
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if (label->name)
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free(label->name);
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if (label->kernel)
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free(label->kernel);
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if (label->config)
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free(label->config);
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if (label->append)
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free(label->append);
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if (label->initrd)
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free(label->initrd);
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if (label->fdt)
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free(label->fdt);
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if (label->fdtdir)
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free(label->fdtdir);
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if (label->fdtoverlays)
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free(label->fdtoverlays);
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free(label);
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}
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/*
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* Print a label and its string members if they're defined.
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*
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* This is passed as a callback to the menu code for displaying each
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* menu entry.
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*/
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static void label_print(void *data)
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{
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struct pxe_label *label = data;
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const char *c = label->menu ? label->menu : label->name;
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printf("%s:\t%s\n", label->num, c);
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}
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/*
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* Boot a label that specified 'localboot'. This requires that the 'localcmd'
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* environment variable is defined. Its contents will be executed as U-Boot
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* command. If the label specified an 'append' line, its contents will be
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* used to overwrite the contents of the 'bootargs' environment variable prior
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* to running 'localcmd'.
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*
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* Returns 1 on success or < 0 on error.
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*/
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static int label_localboot(struct pxe_label *label)
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{
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char *localcmd;
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localcmd = from_env("localcmd");
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if (!localcmd)
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return -ENOENT;
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if (label->append) {
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char bootargs[CONFIG_SYS_CBSIZE];
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cli_simple_process_macros(label->append, bootargs,
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sizeof(bootargs));
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env_set("bootargs", bootargs);
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}
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debug("running: %s\n", localcmd);
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return run_command_list(localcmd, strlen(localcmd), 0);
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}
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/*
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* Loads fdt overlays specified in 'fdtoverlays'.
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*/
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#ifdef CONFIG_OF_LIBFDT_OVERLAY
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static void label_boot_fdtoverlay(struct cmd_tbl *cmdtp, struct pxe_label *label)
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{
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char *fdtoverlay = label->fdtoverlays;
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struct fdt_header *working_fdt;
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char *fdtoverlay_addr_env;
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ulong fdtoverlay_addr;
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ulong fdt_addr;
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int err;
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/* Get the main fdt and map it */
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fdt_addr = simple_strtoul(env_get("fdt_addr_r"), NULL, 16);
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working_fdt = map_sysmem(fdt_addr, 0);
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err = fdt_check_header(working_fdt);
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if (err)
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return;
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/* Get the specific overlay loading address */
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fdtoverlay_addr_env = env_get("fdtoverlay_addr_r");
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if (!fdtoverlay_addr_env) {
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printf("Invalid fdtoverlay_addr_r for loading overlays\n");
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return;
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}
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fdtoverlay_addr = simple_strtoul(fdtoverlay_addr_env, NULL, 16);
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/* Cycle over the overlay files and apply them in order */
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do {
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struct fdt_header *blob;
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char *overlayfile;
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char *end;
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int len;
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/* Drop leading spaces */
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while (*fdtoverlay == ' ')
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++fdtoverlay;
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/* Copy a single filename if multiple provided */
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end = strstr(fdtoverlay, " ");
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if (end) {
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len = (int)(end - fdtoverlay);
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overlayfile = malloc(len + 1);
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strncpy(overlayfile, fdtoverlay, len);
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overlayfile[len] = '\0';
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} else
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overlayfile = fdtoverlay;
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if (!strlen(overlayfile))
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goto skip_overlay;
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/* Load overlay file */
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err = get_relfile_envaddr(cmdtp, overlayfile,
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"fdtoverlay_addr_r");
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if (err < 0) {
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printf("Failed loading overlay %s\n", overlayfile);
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goto skip_overlay;
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}
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/* Resize main fdt */
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fdt_shrink_to_minimum(working_fdt, 8192);
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blob = map_sysmem(fdtoverlay_addr, 0);
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err = fdt_check_header(blob);
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if (err) {
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printf("Invalid overlay %s, skipping\n",
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overlayfile);
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goto skip_overlay;
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}
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err = fdt_overlay_apply_verbose(working_fdt, blob);
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if (err) {
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printf("Failed to apply overlay %s, skipping\n",
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overlayfile);
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goto skip_overlay;
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}
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skip_overlay:
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if (end)
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free(overlayfile);
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} while ((fdtoverlay = strstr(fdtoverlay, " ")));
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}
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#endif
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/*
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* Boot according to the contents of a pxe_label.
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*
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* If we can't boot for any reason, we return. A successful boot never
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* returns.
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*
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* The kernel will be stored in the location given by the 'kernel_addr_r'
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* environment variable.
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*
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* If the label specifies an initrd file, it will be stored in the location
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* given by the 'ramdisk_addr_r' environment variable.
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*
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* If the label specifies an 'append' line, its contents will overwrite that
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* of the 'bootargs' environment variable.
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*/
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static int label_boot(struct cmd_tbl *cmdtp, struct pxe_label *label)
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{
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char *bootm_argv[] = { "bootm", NULL, NULL, NULL, NULL };
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char initrd_str[28];
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char mac_str[29] = "";
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char ip_str[68] = "";
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char *fit_addr = NULL;
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int bootm_argc = 2;
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int len = 0;
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ulong kernel_addr;
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void *buf;
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label_print(label);
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label->attempted = 1;
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if (label->localboot) {
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if (label->localboot_val >= 0)
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label_localboot(label);
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return 0;
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}
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if (!label->kernel) {
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printf("No kernel given, skipping %s\n",
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label->name);
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return 1;
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}
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if (label->initrd) {
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if (get_relfile_envaddr(cmdtp, label->initrd, "ramdisk_addr_r") < 0) {
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printf("Skipping %s for failure retrieving initrd\n",
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label->name);
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return 1;
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}
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bootm_argv[2] = initrd_str;
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strncpy(bootm_argv[2], env_get("ramdisk_addr_r"), 18);
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strcat(bootm_argv[2], ":");
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strncat(bootm_argv[2], env_get("filesize"), 9);
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bootm_argc = 3;
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}
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if (get_relfile_envaddr(cmdtp, label->kernel, "kernel_addr_r") < 0) {
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printf("Skipping %s for failure retrieving kernel\n",
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label->name);
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return 1;
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}
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if (label->ipappend & 0x1) {
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sprintf(ip_str, " ip=%s:%s:%s:%s",
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env_get("ipaddr"), env_get("serverip"),
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env_get("gatewayip"), env_get("netmask"));
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}
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if (IS_ENABLED(CONFIG_CMD_NET)) {
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if (label->ipappend & 0x2) {
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int err;
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strcpy(mac_str, " BOOTIF=");
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err = format_mac_pxe(mac_str + 8, sizeof(mac_str) - 8);
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if (err < 0)
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mac_str[0] = '\0';
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}
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}
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if ((label->ipappend & 0x3) || label->append) {
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char bootargs[CONFIG_SYS_CBSIZE] = "";
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char finalbootargs[CONFIG_SYS_CBSIZE];
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if (strlen(label->append ?: "") +
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strlen(ip_str) + strlen(mac_str) + 1 > sizeof(bootargs)) {
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printf("bootarg overflow %zd+%zd+%zd+1 > %zd\n",
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strlen(label->append ?: ""),
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strlen(ip_str), strlen(mac_str),
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sizeof(bootargs));
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return 1;
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}
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if (label->append)
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strncpy(bootargs, label->append, sizeof(bootargs));
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strcat(bootargs, ip_str);
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strcat(bootargs, mac_str);
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cli_simple_process_macros(bootargs, finalbootargs,
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sizeof(finalbootargs));
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env_set("bootargs", finalbootargs);
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printf("append: %s\n", finalbootargs);
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}
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bootm_argv[1] = env_get("kernel_addr_r");
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/* for FIT, append the configuration identifier */
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if (label->config) {
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int len = strlen(bootm_argv[1]) + strlen(label->config) + 1;
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|
|
fit_addr = malloc(len);
|
|
if (!fit_addr) {
|
|
printf("malloc fail (FIT address)\n");
|
|
return 1;
|
|
}
|
|
snprintf(fit_addr, len, "%s%s", bootm_argv[1], label->config);
|
|
bootm_argv[1] = fit_addr;
|
|
}
|
|
|
|
/*
|
|
* fdt usage is optional:
|
|
* It handles the following scenarios.
|
|
*
|
|
* Scenario 1: If fdt_addr_r specified and "fdt" or "fdtdir" label is
|
|
* defined in pxe file, retrieve fdt blob from server. Pass fdt_addr_r to
|
|
* bootm, and adjust argc appropriately.
|
|
*
|
|
* If retrieve fails and no exact fdt blob is specified in pxe file with
|
|
* "fdt" label, try Scenario 2.
|
|
*
|
|
* Scenario 2: If there is an fdt_addr specified, pass it along to
|
|
* bootm, and adjust argc appropriately.
|
|
*
|
|
* Scenario 3: fdt blob is not available.
|
|
*/
|
|
bootm_argv[3] = env_get("fdt_addr_r");
|
|
|
|
/* if fdt label is defined then get fdt from server */
|
|
if (bootm_argv[3]) {
|
|
char *fdtfile = NULL;
|
|
char *fdtfilefree = NULL;
|
|
|
|
if (label->fdt) {
|
|
fdtfile = label->fdt;
|
|
} else if (label->fdtdir) {
|
|
char *f1, *f2, *f3, *f4, *slash;
|
|
|
|
f1 = env_get("fdtfile");
|
|
if (f1) {
|
|
f2 = "";
|
|
f3 = "";
|
|
f4 = "";
|
|
} else {
|
|
/*
|
|
* For complex cases where this code doesn't
|
|
* generate the correct filename, the board
|
|
* code should set $fdtfile during early boot,
|
|
* or the boot scripts should set $fdtfile
|
|
* before invoking "pxe" or "sysboot".
|
|
*/
|
|
f1 = env_get("soc");
|
|
f2 = "-";
|
|
f3 = env_get("board");
|
|
f4 = ".dtb";
|
|
}
|
|
|
|
len = strlen(label->fdtdir);
|
|
if (!len)
|
|
slash = "./";
|
|
else if (label->fdtdir[len - 1] != '/')
|
|
slash = "/";
|
|
else
|
|
slash = "";
|
|
|
|
len = strlen(label->fdtdir) + strlen(slash) +
|
|
strlen(f1) + strlen(f2) + strlen(f3) +
|
|
strlen(f4) + 1;
|
|
fdtfilefree = malloc(len);
|
|
if (!fdtfilefree) {
|
|
printf("malloc fail (FDT filename)\n");
|
|
goto cleanup;
|
|
}
|
|
|
|
snprintf(fdtfilefree, len, "%s%s%s%s%s%s",
|
|
label->fdtdir, slash, f1, f2, f3, f4);
|
|
fdtfile = fdtfilefree;
|
|
}
|
|
|
|
if (fdtfile) {
|
|
int err = get_relfile_envaddr(cmdtp, fdtfile,
|
|
"fdt_addr_r");
|
|
|
|
free(fdtfilefree);
|
|
if (err < 0) {
|
|
bootm_argv[3] = NULL;
|
|
|
|
if (label->fdt) {
|
|
printf("Skipping %s for failure retrieving FDT\n",
|
|
label->name);
|
|
goto cleanup;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_OF_LIBFDT_OVERLAY
|
|
if (label->fdtoverlays)
|
|
label_boot_fdtoverlay(cmdtp, label);
|
|
#endif
|
|
} else {
|
|
bootm_argv[3] = NULL;
|
|
}
|
|
}
|
|
|
|
if (!bootm_argv[3])
|
|
bootm_argv[3] = env_get("fdt_addr");
|
|
|
|
if (bootm_argv[3]) {
|
|
if (!bootm_argv[2])
|
|
bootm_argv[2] = "-";
|
|
bootm_argc = 4;
|
|
}
|
|
|
|
kernel_addr = genimg_get_kernel_addr(bootm_argv[1]);
|
|
buf = map_sysmem(kernel_addr, 0);
|
|
/* Try bootm for legacy and FIT format image */
|
|
if (genimg_get_format(buf) != IMAGE_FORMAT_INVALID)
|
|
do_bootm(cmdtp, 0, bootm_argc, bootm_argv);
|
|
/* Try booting an AArch64 Linux kernel image */
|
|
else if (IS_ENABLED(CONFIG_CMD_BOOTI))
|
|
do_booti(cmdtp, 0, bootm_argc, bootm_argv);
|
|
/* Try booting a Image */
|
|
else if (IS_ENABLED(CONFIG_CMD_BOOTZ))
|
|
do_bootz(cmdtp, 0, bootm_argc, bootm_argv);
|
|
/* Try booting an x86_64 Linux kernel image */
|
|
else if (IS_ENABLED(CONFIG_CMD_ZBOOT))
|
|
do_zboot_parent(cmdtp, 0, bootm_argc, bootm_argv, NULL);
|
|
|
|
unmap_sysmem(buf);
|
|
|
|
cleanup:
|
|
if (fit_addr)
|
|
free(fit_addr);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Tokens for the pxe file parser.
|
|
*/
|
|
enum token_type {
|
|
T_EOL,
|
|
T_STRING,
|
|
T_EOF,
|
|
T_MENU,
|
|
T_TITLE,
|
|
T_TIMEOUT,
|
|
T_LABEL,
|
|
T_KERNEL,
|
|
T_LINUX,
|
|
T_APPEND,
|
|
T_INITRD,
|
|
T_LOCALBOOT,
|
|
T_DEFAULT,
|
|
T_PROMPT,
|
|
T_INCLUDE,
|
|
T_FDT,
|
|
T_FDTDIR,
|
|
T_FDTOVERLAYS,
|
|
T_ONTIMEOUT,
|
|
T_IPAPPEND,
|
|
T_BACKGROUND,
|
|
T_INVALID
|
|
};
|
|
|
|
/*
|
|
* A token - given by a value and a type.
|
|
*/
|
|
struct token {
|
|
char *val;
|
|
enum token_type type;
|
|
};
|
|
|
|
/*
|
|
* Keywords recognized.
|
|
*/
|
|
static const struct token keywords[] = {
|
|
{"menu", T_MENU},
|
|
{"title", T_TITLE},
|
|
{"timeout", T_TIMEOUT},
|
|
{"default", T_DEFAULT},
|
|
{"prompt", T_PROMPT},
|
|
{"label", T_LABEL},
|
|
{"kernel", T_KERNEL},
|
|
{"linux", T_LINUX},
|
|
{"localboot", T_LOCALBOOT},
|
|
{"append", T_APPEND},
|
|
{"initrd", T_INITRD},
|
|
{"include", T_INCLUDE},
|
|
{"devicetree", T_FDT},
|
|
{"fdt", T_FDT},
|
|
{"devicetreedir", T_FDTDIR},
|
|
{"fdtdir", T_FDTDIR},
|
|
{"fdtoverlays", T_FDTOVERLAYS},
|
|
{"ontimeout", T_ONTIMEOUT,},
|
|
{"ipappend", T_IPAPPEND,},
|
|
{"background", T_BACKGROUND,},
|
|
{NULL, T_INVALID}
|
|
};
|
|
|
|
/*
|
|
* Since pxe(linux) files don't have a token to identify the start of a
|
|
* literal, we have to keep track of when we're in a state where a literal is
|
|
* expected vs when we're in a state a keyword is expected.
|
|
*/
|
|
enum lex_state {
|
|
L_NORMAL = 0,
|
|
L_KEYWORD,
|
|
L_SLITERAL
|
|
};
|
|
|
|
/*
|
|
* get_string retrieves a string from *p and stores it as a token in
|
|
* *t.
|
|
*
|
|
* get_string used for scanning both string literals and keywords.
|
|
*
|
|
* Characters from *p are copied into t-val until a character equal to
|
|
* delim is found, or a NUL byte is reached. If delim has the special value of
|
|
* ' ', any whitespace character will be used as a delimiter.
|
|
*
|
|
* If lower is unequal to 0, uppercase characters will be converted to
|
|
* lowercase in the result. This is useful to make keywords case
|
|
* insensitive.
|
|
*
|
|
* The location of *p is updated to point to the first character after the end
|
|
* of the token - the ending delimiter.
|
|
*
|
|
* On success, the new value of t->val is returned. Memory for t->val is
|
|
* allocated using malloc and must be free()'d to reclaim it. If insufficient
|
|
* memory is available, NULL is returned.
|
|
*/
|
|
static char *get_string(char **p, struct token *t, char delim, int lower)
|
|
{
|
|
char *b, *e;
|
|
size_t len, i;
|
|
|
|
/*
|
|
* b and e both start at the beginning of the input stream.
|
|
*
|
|
* e is incremented until we find the ending delimiter, or a NUL byte
|
|
* is reached. Then, we take e - b to find the length of the token.
|
|
*/
|
|
b = *p;
|
|
e = *p;
|
|
|
|
while (*e) {
|
|
if ((delim == ' ' && isspace(*e)) || delim == *e)
|
|
break;
|
|
e++;
|
|
}
|
|
|
|
len = e - b;
|
|
|
|
/*
|
|
* Allocate memory to hold the string, and copy it in, converting
|
|
* characters to lowercase if lower is != 0.
|
|
*/
|
|
t->val = malloc(len + 1);
|
|
if (!t->val)
|
|
return NULL;
|
|
|
|
for (i = 0; i < len; i++, b++) {
|
|
if (lower)
|
|
t->val[i] = tolower(*b);
|
|
else
|
|
t->val[i] = *b;
|
|
}
|
|
|
|
t->val[len] = '\0';
|
|
|
|
/*
|
|
* Update *p so the caller knows where to continue scanning.
|
|
*/
|
|
*p = e;
|
|
|
|
t->type = T_STRING;
|
|
|
|
return t->val;
|
|
}
|
|
|
|
/*
|
|
* Populate a keyword token with a type and value.
|
|
*/
|
|
static void get_keyword(struct token *t)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; keywords[i].val; i++) {
|
|
if (!strcmp(t->val, keywords[i].val)) {
|
|
t->type = keywords[i].type;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get the next token. We have to keep track of which state we're in to know
|
|
* if we're looking to get a string literal or a keyword.
|
|
*
|
|
* *p is updated to point at the first character after the current token.
|
|
*/
|
|
static void get_token(char **p, struct token *t, enum lex_state state)
|
|
{
|
|
char *c = *p;
|
|
|
|
t->type = T_INVALID;
|
|
|
|
/* eat non EOL whitespace */
|
|
while (isblank(*c))
|
|
c++;
|
|
|
|
/*
|
|
* eat comments. note that string literals can't begin with #, but
|
|
* can contain a # after their first character.
|
|
*/
|
|
if (*c == '#') {
|
|
while (*c && *c != '\n')
|
|
c++;
|
|
}
|
|
|
|
if (*c == '\n') {
|
|
t->type = T_EOL;
|
|
c++;
|
|
} else if (*c == '\0') {
|
|
t->type = T_EOF;
|
|
c++;
|
|
} else if (state == L_SLITERAL) {
|
|
get_string(&c, t, '\n', 0);
|
|
} else if (state == L_KEYWORD) {
|
|
/*
|
|
* when we expect a keyword, we first get the next string
|
|
* token delimited by whitespace, and then check if it
|
|
* matches a keyword in our keyword list. if it does, it's
|
|
* converted to a keyword token of the appropriate type, and
|
|
* if not, it remains a string token.
|
|
*/
|
|
get_string(&c, t, ' ', 1);
|
|
get_keyword(t);
|
|
}
|
|
|
|
*p = c;
|
|
}
|
|
|
|
/*
|
|
* Increment *c until we get to the end of the current line, or EOF.
|
|
*/
|
|
static void eol_or_eof(char **c)
|
|
{
|
|
while (**c && **c != '\n')
|
|
(*c)++;
|
|
}
|
|
|
|
/*
|
|
* All of these parse_* functions share some common behavior.
|
|
*
|
|
* They finish with *c pointing after the token they parse, and return 1 on
|
|
* success, or < 0 on error.
|
|
*/
|
|
|
|
/*
|
|
* Parse a string literal and store a pointer it at *dst. String literals
|
|
* terminate at the end of the line.
|
|
*/
|
|
static int parse_sliteral(char **c, char **dst)
|
|
{
|
|
struct token t;
|
|
char *s = *c;
|
|
|
|
get_token(c, &t, L_SLITERAL);
|
|
|
|
if (t.type != T_STRING) {
|
|
printf("Expected string literal: %.*s\n", (int)(*c - s), s);
|
|
return -EINVAL;
|
|
}
|
|
|
|
*dst = t.val;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Parse a base 10 (unsigned) integer and store it at *dst.
|
|
*/
|
|
static int parse_integer(char **c, int *dst)
|
|
{
|
|
struct token t;
|
|
char *s = *c;
|
|
|
|
get_token(c, &t, L_SLITERAL);
|
|
|
|
if (t.type != T_STRING) {
|
|
printf("Expected string: %.*s\n", (int)(*c - s), s);
|
|
return -EINVAL;
|
|
}
|
|
|
|
*dst = simple_strtol(t.val, NULL, 10);
|
|
|
|
free(t.val);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int parse_pxefile_top(struct cmd_tbl *cmdtp, char *p, unsigned long base,
|
|
struct pxe_menu *cfg, int nest_level);
|
|
|
|
/*
|
|
* Parse an include statement, and retrieve and parse the file it mentions.
|
|
*
|
|
* base should point to a location where it's safe to store the file, and
|
|
* nest_level should indicate how many nested includes have occurred. For this
|
|
* include, nest_level has already been incremented and doesn't need to be
|
|
* incremented here.
|
|
*/
|
|
static int handle_include(struct cmd_tbl *cmdtp, char **c, unsigned long base,
|
|
struct pxe_menu *cfg, int nest_level)
|
|
{
|
|
char *include_path;
|
|
char *s = *c;
|
|
int err;
|
|
char *buf;
|
|
int ret;
|
|
|
|
err = parse_sliteral(c, &include_path);
|
|
|
|
if (err < 0) {
|
|
printf("Expected include path: %.*s\n", (int)(*c - s), s);
|
|
return err;
|
|
}
|
|
|
|
err = get_pxe_file(cmdtp, include_path, base);
|
|
|
|
if (err < 0) {
|
|
printf("Couldn't retrieve %s\n", include_path);
|
|
return err;
|
|
}
|
|
|
|
buf = map_sysmem(base, 0);
|
|
ret = parse_pxefile_top(cmdtp, buf, base, cfg, nest_level);
|
|
unmap_sysmem(buf);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Parse lines that begin with 'menu'.
|
|
*
|
|
* base and nest are provided to handle the 'menu include' case.
|
|
*
|
|
* base should point to a location where it's safe to store the included file.
|
|
*
|
|
* nest_level should be 1 when parsing the top level pxe file, 2 when parsing
|
|
* a file it includes, 3 when parsing a file included by that file, and so on.
|
|
*/
|
|
static int parse_menu(struct cmd_tbl *cmdtp, char **c, struct pxe_menu *cfg,
|
|
unsigned long base, int nest_level)
|
|
{
|
|
struct token t;
|
|
char *s = *c;
|
|
int err = 0;
|
|
|
|
get_token(c, &t, L_KEYWORD);
|
|
|
|
switch (t.type) {
|
|
case T_TITLE:
|
|
err = parse_sliteral(c, &cfg->title);
|
|
|
|
break;
|
|
|
|
case T_INCLUDE:
|
|
err = handle_include(cmdtp, c, base, cfg, nest_level + 1);
|
|
break;
|
|
|
|
case T_BACKGROUND:
|
|
err = parse_sliteral(c, &cfg->bmp);
|
|
break;
|
|
|
|
default:
|
|
printf("Ignoring malformed menu command: %.*s\n",
|
|
(int)(*c - s), s);
|
|
}
|
|
|
|
if (err < 0)
|
|
return err;
|
|
|
|
eol_or_eof(c);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Handles parsing a 'menu line' when we're parsing a label.
|
|
*/
|
|
static int parse_label_menu(char **c, struct pxe_menu *cfg,
|
|
struct pxe_label *label)
|
|
{
|
|
struct token t;
|
|
char *s;
|
|
|
|
s = *c;
|
|
|
|
get_token(c, &t, L_KEYWORD);
|
|
|
|
switch (t.type) {
|
|
case T_DEFAULT:
|
|
if (!cfg->default_label)
|
|
cfg->default_label = strdup(label->name);
|
|
|
|
if (!cfg->default_label)
|
|
return -ENOMEM;
|
|
|
|
break;
|
|
case T_LABEL:
|
|
parse_sliteral(c, &label->menu);
|
|
break;
|
|
default:
|
|
printf("Ignoring malformed menu command: %.*s\n",
|
|
(int)(*c - s), s);
|
|
}
|
|
|
|
eol_or_eof(c);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Handles parsing a 'kernel' label.
|
|
* expecting "filename" or "<fit_filename>#cfg"
|
|
*/
|
|
static int parse_label_kernel(char **c, struct pxe_label *label)
|
|
{
|
|
char *s;
|
|
int err;
|
|
|
|
err = parse_sliteral(c, &label->kernel);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
s = strstr(label->kernel, "#");
|
|
if (!s)
|
|
return 1;
|
|
|
|
label->config = malloc(strlen(s) + 1);
|
|
if (!label->config)
|
|
return -ENOMEM;
|
|
|
|
strcpy(label->config, s);
|
|
*s = 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Parses a label and adds it to the list of labels for a menu.
|
|
*
|
|
* A label ends when we either get to the end of a file, or
|
|
* get some input we otherwise don't have a handler defined
|
|
* for.
|
|
*
|
|
*/
|
|
static int parse_label(char **c, struct pxe_menu *cfg)
|
|
{
|
|
struct token t;
|
|
int len;
|
|
char *s = *c;
|
|
struct pxe_label *label;
|
|
int err;
|
|
|
|
label = label_create();
|
|
if (!label)
|
|
return -ENOMEM;
|
|
|
|
err = parse_sliteral(c, &label->name);
|
|
if (err < 0) {
|
|
printf("Expected label name: %.*s\n", (int)(*c - s), s);
|
|
label_destroy(label);
|
|
return -EINVAL;
|
|
}
|
|
|
|
list_add_tail(&label->list, &cfg->labels);
|
|
|
|
while (1) {
|
|
s = *c;
|
|
get_token(c, &t, L_KEYWORD);
|
|
|
|
err = 0;
|
|
switch (t.type) {
|
|
case T_MENU:
|
|
err = parse_label_menu(c, cfg, label);
|
|
break;
|
|
|
|
case T_KERNEL:
|
|
case T_LINUX:
|
|
err = parse_label_kernel(c, label);
|
|
break;
|
|
|
|
case T_APPEND:
|
|
err = parse_sliteral(c, &label->append);
|
|
if (label->initrd)
|
|
break;
|
|
s = strstr(label->append, "initrd=");
|
|
if (!s)
|
|
break;
|
|
s += 7;
|
|
len = (int)(strchr(s, ' ') - s);
|
|
label->initrd = malloc(len + 1);
|
|
strncpy(label->initrd, s, len);
|
|
label->initrd[len] = '\0';
|
|
|
|
break;
|
|
|
|
case T_INITRD:
|
|
if (!label->initrd)
|
|
err = parse_sliteral(c, &label->initrd);
|
|
break;
|
|
|
|
case T_FDT:
|
|
if (!label->fdt)
|
|
err = parse_sliteral(c, &label->fdt);
|
|
break;
|
|
|
|
case T_FDTDIR:
|
|
if (!label->fdtdir)
|
|
err = parse_sliteral(c, &label->fdtdir);
|
|
break;
|
|
|
|
case T_FDTOVERLAYS:
|
|
if (!label->fdtoverlays)
|
|
err = parse_sliteral(c, &label->fdtoverlays);
|
|
break;
|
|
|
|
case T_LOCALBOOT:
|
|
label->localboot = 1;
|
|
err = parse_integer(c, &label->localboot_val);
|
|
break;
|
|
|
|
case T_IPAPPEND:
|
|
err = parse_integer(c, &label->ipappend);
|
|
break;
|
|
|
|
case T_EOL:
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* put the token back! we don't want it - it's the end
|
|
* of a label and whatever token this is, it's
|
|
* something for the menu level context to handle.
|
|
*/
|
|
*c = s;
|
|
return 1;
|
|
}
|
|
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This 16 comes from the limit pxelinux imposes on nested includes.
|
|
*
|
|
* There is no reason at all we couldn't do more, but some limit helps prevent
|
|
* infinite (until crash occurs) recursion if a file tries to include itself.
|
|
*/
|
|
#define MAX_NEST_LEVEL 16
|
|
|
|
/*
|
|
* Entry point for parsing a menu file. nest_level indicates how many times
|
|
* we've nested in includes. It will be 1 for the top level menu file.
|
|
*
|
|
* Returns 1 on success, < 0 on error.
|
|
*/
|
|
static int parse_pxefile_top(struct cmd_tbl *cmdtp, char *p, unsigned long base,
|
|
struct pxe_menu *cfg, int nest_level)
|
|
{
|
|
struct token t;
|
|
char *s, *b, *label_name;
|
|
int err;
|
|
|
|
b = p;
|
|
|
|
if (nest_level > MAX_NEST_LEVEL) {
|
|
printf("Maximum nesting (%d) exceeded\n", MAX_NEST_LEVEL);
|
|
return -EMLINK;
|
|
}
|
|
|
|
while (1) {
|
|
s = p;
|
|
|
|
get_token(&p, &t, L_KEYWORD);
|
|
|
|
err = 0;
|
|
switch (t.type) {
|
|
case T_MENU:
|
|
cfg->prompt = 1;
|
|
err = parse_menu(cmdtp, &p, cfg,
|
|
base + ALIGN(strlen(b) + 1, 4),
|
|
nest_level);
|
|
break;
|
|
|
|
case T_TIMEOUT:
|
|
err = parse_integer(&p, &cfg->timeout);
|
|
break;
|
|
|
|
case T_LABEL:
|
|
err = parse_label(&p, cfg);
|
|
break;
|
|
|
|
case T_DEFAULT:
|
|
case T_ONTIMEOUT:
|
|
err = parse_sliteral(&p, &label_name);
|
|
|
|
if (label_name) {
|
|
if (cfg->default_label)
|
|
free(cfg->default_label);
|
|
|
|
cfg->default_label = label_name;
|
|
}
|
|
|
|
break;
|
|
|
|
case T_INCLUDE:
|
|
err = handle_include(cmdtp, &p,
|
|
base + ALIGN(strlen(b), 4), cfg,
|
|
nest_level + 1);
|
|
break;
|
|
|
|
case T_PROMPT:
|
|
eol_or_eof(&p);
|
|
break;
|
|
|
|
case T_EOL:
|
|
break;
|
|
|
|
case T_EOF:
|
|
return 1;
|
|
|
|
default:
|
|
printf("Ignoring unknown command: %.*s\n",
|
|
(int)(p - s), s);
|
|
eol_or_eof(&p);
|
|
}
|
|
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Free the memory used by a pxe_menu and its labels.
|
|
*/
|
|
void destroy_pxe_menu(struct pxe_menu *cfg)
|
|
{
|
|
struct list_head *pos, *n;
|
|
struct pxe_label *label;
|
|
|
|
if (cfg->title)
|
|
free(cfg->title);
|
|
|
|
if (cfg->default_label)
|
|
free(cfg->default_label);
|
|
|
|
list_for_each_safe(pos, n, &cfg->labels) {
|
|
label = list_entry(pos, struct pxe_label, list);
|
|
|
|
label_destroy(label);
|
|
}
|
|
|
|
free(cfg);
|
|
}
|
|
|
|
/*
|
|
* Entry point for parsing a pxe file. This is only used for the top level
|
|
* file.
|
|
*
|
|
* Returns NULL if there is an error, otherwise, returns a pointer to a
|
|
* pxe_menu struct populated with the results of parsing the pxe file (and any
|
|
* files it includes). The resulting pxe_menu struct can be free()'d by using
|
|
* the destroy_pxe_menu() function.
|
|
*/
|
|
struct pxe_menu *parse_pxefile(struct cmd_tbl *cmdtp, unsigned long menucfg)
|
|
{
|
|
struct pxe_menu *cfg;
|
|
char *buf;
|
|
int r;
|
|
|
|
cfg = malloc(sizeof(struct pxe_menu));
|
|
|
|
if (!cfg)
|
|
return NULL;
|
|
|
|
memset(cfg, 0, sizeof(struct pxe_menu));
|
|
|
|
INIT_LIST_HEAD(&cfg->labels);
|
|
|
|
buf = map_sysmem(menucfg, 0);
|
|
r = parse_pxefile_top(cmdtp, buf, menucfg, cfg, 1);
|
|
unmap_sysmem(buf);
|
|
|
|
if (r < 0) {
|
|
destroy_pxe_menu(cfg);
|
|
return NULL;
|
|
}
|
|
|
|
return cfg;
|
|
}
|
|
|
|
/*
|
|
* Converts a pxe_menu struct into a menu struct for use with U-Boot's generic
|
|
* menu code.
|
|
*/
|
|
static struct menu *pxe_menu_to_menu(struct pxe_menu *cfg)
|
|
{
|
|
struct pxe_label *label;
|
|
struct list_head *pos;
|
|
struct menu *m;
|
|
int err;
|
|
int i = 1;
|
|
char *default_num = NULL;
|
|
|
|
/*
|
|
* Create a menu and add items for all the labels.
|
|
*/
|
|
m = menu_create(cfg->title, DIV_ROUND_UP(cfg->timeout, 10),
|
|
cfg->prompt, NULL, label_print, NULL, NULL);
|
|
|
|
if (!m)
|
|
return NULL;
|
|
|
|
list_for_each(pos, &cfg->labels) {
|
|
label = list_entry(pos, struct pxe_label, list);
|
|
|
|
sprintf(label->num, "%d", i++);
|
|
if (menu_item_add(m, label->num, label) != 1) {
|
|
menu_destroy(m);
|
|
return NULL;
|
|
}
|
|
if (cfg->default_label &&
|
|
(strcmp(label->name, cfg->default_label) == 0))
|
|
default_num = label->num;
|
|
}
|
|
|
|
/*
|
|
* After we've created items for each label in the menu, set the
|
|
* menu's default label if one was specified.
|
|
*/
|
|
if (default_num) {
|
|
err = menu_default_set(m, default_num);
|
|
if (err != 1) {
|
|
if (err != -ENOENT) {
|
|
menu_destroy(m);
|
|
return NULL;
|
|
}
|
|
|
|
printf("Missing default: %s\n", cfg->default_label);
|
|
}
|
|
}
|
|
|
|
return m;
|
|
}
|
|
|
|
/*
|
|
* Try to boot any labels we have yet to attempt to boot.
|
|
*/
|
|
static void boot_unattempted_labels(struct cmd_tbl *cmdtp, struct pxe_menu *cfg)
|
|
{
|
|
struct list_head *pos;
|
|
struct pxe_label *label;
|
|
|
|
list_for_each(pos, &cfg->labels) {
|
|
label = list_entry(pos, struct pxe_label, list);
|
|
|
|
if (!label->attempted)
|
|
label_boot(cmdtp, label);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Boot the system as prescribed by a pxe_menu.
|
|
*
|
|
* Use the menu system to either get the user's choice or the default, based
|
|
* on config or user input. If there is no default or user's choice,
|
|
* attempted to boot labels in the order they were given in pxe files.
|
|
* If the default or user's choice fails to boot, attempt to boot other
|
|
* labels in the order they were given in pxe files.
|
|
*
|
|
* If this function returns, there weren't any labels that successfully
|
|
* booted, or the user interrupted the menu selection via ctrl+c.
|
|
*/
|
|
void handle_pxe_menu(struct cmd_tbl *cmdtp, struct pxe_menu *cfg)
|
|
{
|
|
void *choice;
|
|
struct menu *m;
|
|
int err;
|
|
|
|
if (IS_ENABLED(CONFIG_CMD_BMP)) {
|
|
/* display BMP if available */
|
|
if (cfg->bmp) {
|
|
if (get_relfile(cmdtp, cfg->bmp, image_load_addr)) {
|
|
if (CONFIG_IS_ENABLED(CMD_CLS))
|
|
run_command("cls", 0);
|
|
bmp_display(image_load_addr,
|
|
BMP_ALIGN_CENTER, BMP_ALIGN_CENTER);
|
|
} else {
|
|
printf("Skipping background bmp %s for failure\n",
|
|
cfg->bmp);
|
|
}
|
|
}
|
|
}
|
|
|
|
m = pxe_menu_to_menu(cfg);
|
|
if (!m)
|
|
return;
|
|
|
|
err = menu_get_choice(m, &choice);
|
|
|
|
menu_destroy(m);
|
|
|
|
/*
|
|
* err == 1 means we got a choice back from menu_get_choice.
|
|
*
|
|
* err == -ENOENT if the menu was setup to select the default but no
|
|
* default was set. in that case, we should continue trying to boot
|
|
* labels that haven't been attempted yet.
|
|
*
|
|
* otherwise, the user interrupted or there was some other error and
|
|
* we give up.
|
|
*/
|
|
|
|
if (err == 1) {
|
|
err = label_boot(cmdtp, choice);
|
|
if (!err)
|
|
return;
|
|
} else if (err != -ENOENT) {
|
|
return;
|
|
}
|
|
|
|
boot_unattempted_labels(cmdtp, cfg);
|
|
}
|