1 files changed, 132 insertions, 0 deletions
diff --git a/cmd/sysboot.c b/cmd/sysboot.c
new file mode 100644
index 00000000000..0ea08fd7b53
--- /dev/null
+++ b/cmd/sysboot.c
@@ -0,0 +1,132 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <command.h>
+#include <env.h>
+#include <fs.h>
+#include <pxe_utils.h>
+#include <vsprintf.h>
+
+/**
+ * struct sysboot_info - useful information for sysboot helpers
+ *
+ * @fstype: Filesystem type (FS_TYPE_...)
+ * @ifname: Interface name (e.g. "ide", "scsi")
+ * @dev_part_str is in the format:
+ *	<dev>.<hw_part>:<part> where <dev> is the device number,
+ *	<hw_part> is the optional hardware partition number and
+ *	<part> is the partition number
+ */
+struct sysboot_info {
+	int fstype;
+	const char *ifname;
+	const char *dev_part_str;
+};
+
+static int sysboot_read_file(struct pxe_context *ctx, const char *file_path,
+			     char *file_addr, ulong *sizep)
+{
+	struct sysboot_info *info = ctx->userdata;
+	loff_t len_read;
+	ulong addr;
+	int ret;
+
+	addr = simple_strtoul(file_addr, NULL, 16);
+	ret = fs_set_blk_dev(info->ifname, info->dev_part_str, info->fstype);
+	if (ret)
+		return ret;
+	ret = fs_read(file_path, addr, 0, 0, &len_read);
+	if (ret)
+		return ret;
+	*sizep = len_read;
+
+	return 0;
+}
+
+/*
+ * Boots a system using a local disk syslinux/extlinux file
+ *
+ * Returns 0 on success, 1 on error.
+ */
+static int do_sysboot(struct cmd_tbl *cmdtp, int flag, int argc,
+		      char *const argv[])
+{
+	unsigned long pxefile_addr_r;
+	struct pxe_context ctx;
+	char *pxefile_addr_str;
+	struct sysboot_info info;
+	char *filename;
+	int prompt = 0;
+	int ret;
+
+	if (argc > 1 && strstr(argv[1], "-p")) {
+		prompt = 1;
+		argc--;
+		argv++;
+	}
+
+	if (argc < 4)
+		return cmd_usage(cmdtp);
+
+	if (argc < 5) {
+		pxefile_addr_str = from_env("pxefile_addr_r");
+		if (!pxefile_addr_str)
+			return 1;
+	} else {
+		pxefile_addr_str = argv[4];
+	}
+
+	if (argc < 6) {
+		filename = env_get("bootfile");
+		if (!filename) {
+			printf("Specify a filename or set the ${bootfile} environment variable\n");
+			return 1;
+		}
+	} else {
+		filename = argv[5];
+		env_set("bootfile", filename);
+	}
+
+	if (strstr(argv[3], "ext2")) {
+		info.fstype = FS_TYPE_EXT;
+	} else if (strstr(argv[3], "fat")) {
+		info.fstype = FS_TYPE_FAT;
+	} else if (strstr(argv[3], "any")) {
+		info.fstype = FS_TYPE_ANY;
+	} else {
+		printf("Invalid filesystem: %s\n", argv[3]);
+		return 1;
+	}
+	info.ifname = argv[1];
+	info.dev_part_str = argv[2];
+
+	if (strict_strtoul(pxefile_addr_str, 16, &pxefile_addr_r) < 0) {
+		printf("Invalid pxefile address: %s\n", pxefile_addr_str);
+		return 1;
+	}
+
+	if (pxe_setup_ctx(&ctx, cmdtp, sysboot_read_file, &info, true,
+			  filename, false)) {
+		printf("Out of memory\n");
+		return CMD_RET_FAILURE;
+	}
+
+	if (get_pxe_file(&ctx, filename, pxefile_addr_r) < 0) {
+		printf("Error reading config file\n");
+		pxe_destroy_ctx(&ctx);
+		return 1;
+	}
+
+	ret = pxe_process(&ctx, pxefile_addr_r, prompt);
+	pxe_destroy_ctx(&ctx);
+	if (ret)
+		return CMD_RET_FAILURE;
+
+	return 0;
+}
+
+U_BOOT_CMD(sysboot, 7, 1, do_sysboot,
+	   "command to get and boot from syslinux files",
+	   "[-p] <interface> <dev[:part]> <ext2|fat|any> [addr] [filename]\n"
+	   "    - load and parse syslinux menu file 'filename' from ext2, fat\n"
+	   "      or any filesystem on 'dev' on 'interface' to address 'addr'"
+);