Das U-Boot: Universal Boot Loader

diff --git a/common/cmd_autoscript.c b/common/cmd_autoscript.c
new file mode 100644 (file)
index 0000000..49bd463
--- /dev/null
+++ b/common/cmd_autoscript.c
@@ -0,0 +1,174 @@
+/*
+ * (C) Copyright 2001
+ * Kyle Harris, kharris@nexus-tech.net
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+ * autoscript allows a remote host to download a command file and,
+ * optionally, binary data for automatically updating the target. For
+ * example, you create a new kernel image and want the user to be
+ * able to simply download the image and the machine does the rest.
+ * The kernel image is postprocessed with mkimage, which creates an
+ * image with a script file prepended. If enabled, autoscript will
+ * verify the script and contents of the download and execute the
+ * script portion. This would be responsible for erasing flash,
+ * copying the new image, and rebooting the machine.
+ */
+
+/* #define DEBUG */
+
+#include <common.h>
+#include <command.h>
+#include <image.h>
+#include <malloc.h>
+#include <asm/byteorder.h>
+#include <cmd_boot.h>
+#include <cmd_autoscript.h>
+#if defined(CONFIG_8xx)
+#include <mpc8xx.h>
+#endif
+#ifdef CFG_HUSH_PARSER
+#include <hush.h>
+#endif
+
+#if defined(CONFIG_AUTOSCRIPT) || \
+        (CONFIG_COMMANDS & CFG_CMD_AUTOSCRIPT)
+
+extern image_header_t header;          /* from cmd_bootm.c */
+int
+autoscript (ulong addr)
+{
+       ulong crc, data, len;
+       image_header_t *hdr = &header;
+       ulong *len_ptr;
+       char *cmd;
+       int rcode = 0;
+       int verify;
+
+       cmd = getenv ("verify");
+       verify = (cmd && (*cmd == 'n')) ? 0 : 1;
+
+
+       memmove (hdr, (char *)addr, sizeof(image_header_t));
+
+       if (ntohl(hdr->ih_magic) != IH_MAGIC) {
+               printf ("Bad magic number\n");
+               return 1;
+       }
+
+       crc = ntohl(hdr->ih_hcrc);
+       hdr->ih_hcrc = 0;
+       len = sizeof (image_header_t);
+       data = (ulong)hdr;
+       if (crc32(0, (char *)data, len) != crc) {
+               printf ("Bad header crc\n");
+               return 1;
+       }
+
+       data = addr + sizeof(image_header_t);
+       len = ntohl(hdr->ih_size);
+
+       if (verify) {
+               if (crc32(0, (char *)data, len) != ntohl(hdr->ih_dcrc)) {
+                       printf ("Bad data crc\n");
+                       return 1;
+               }
+       }
+
+       if (hdr->ih_type != IH_TYPE_SCRIPT) {
+               printf ("Bad image type\n");
+               return 1;
+       }
+
+       /* get length of script */
+       len_ptr = (ulong *)data;
+
+       if ((len = ntohl(*len_ptr)) == 0) {
+               printf ("Empty Script\n");
+               return 1;
+       }
+
+       debug ("** Script length: %d\n", len);
+
+       if ((cmd = malloc (len + 1)) == NULL) {
+               return 1;
+       }
+
+       while (*len_ptr++);
+
+       /* make sure cmd is null terminated */
+       memmove (cmd, (char *)len_ptr, len);
+       *(cmd + len) = 0;
+
+#ifdef CFG_HUSH_PARSER
+       rcode = parse_string_outer (cmd, FLAG_PARSE_SEMICOLON);
+#else
+       {
+               char *line = cmd;
+               char *next = cmd;
+
+               /*
+                * break into individual lines,
+                * and execute each line;
+                * terminate on error.
+                */
+               while (*next) {
+                       if (*next == '\n') {
+                               *next = '\0';
+                               /* run only non-empty commands */
+                               if ((next - line) > 1) {
+                                       debug ("** exec: \"%s\"\n",
+                                               line);
+                                       if (run_command (line, 0) < 0) {
+                                               rcode = 1;
+                                               break;
+                                       }
+                               }
+                               line = next + 1;
+                       }
+                       ++next;
+               }
+       }
+#endif
+       free (cmd);
+       return rcode;
+}
+
+#endif /* CONFIG_AUTOSCRIPT || CFG_CMD_AUTOSCRIPT */
+
+#if (CONFIG_COMMANDS & CFG_CMD_AUTOSCRIPT)
+int
+do_autoscript (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+       ulong addr;
+       int rcode;
+
+       if (argc < 2) {
+               addr = CFG_LOAD_ADDR;
+       } else {
+               addr = simple_strtoul (argv[1],0,16);
+       }
+
+       printf ("## Executing script at %08lx\n",addr);
+       rcode = autoscript (addr);
+       return rcode;
+}
+#endif /* CFG_CMD_AUTOSCRIPT */