cmd_source.c
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/*
* (C) Copyright 2001
* Kyle Harris, kharris@nexus-tech.net
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* The "source" command allows to define "script images", i. e. files
* that contain command sequences that can be executed by the command
* interpreter. It returns the exit status of the last command
* executed from the script. This is very similar to running a shell
* script in a UNIX shell, hence the name for the command.
*/
/* #define DEBUG */
#include <common.h>
#include <command.h>
#include <image.h>
#include <malloc.h>
#include <asm/byteorder.h>
#include <asm/io.h>
#if defined(CONFIG_8xx)
#include <mpc8xx.h>
#endif
int
source (ulong addr, const char *fit_uname)
{
ulong len;
#if defined(CONFIG_IMAGE_FORMAT_LEGACY)
const image_header_t *hdr;
#endif
ulong *data;
int verify;
void *buf;
#if defined(CONFIG_FIT)
const void* fit_hdr;
int noffset;
const void *fit_data;
size_t fit_len;
#endif
verify = getenv_yesno ("verify");
buf = map_sysmem(addr, 0);
switch (genimg_get_format(buf)) {
#if defined(CONFIG_IMAGE_FORMAT_LEGACY)
case IMAGE_FORMAT_LEGACY:
hdr = buf;
if (!image_check_magic (hdr)) {
puts ("Bad magic number\n");
return 1;
}
if (!image_check_hcrc (hdr)) {
puts ("Bad header crc\n");
return 1;
}
if (verify) {
if (!image_check_dcrc (hdr)) {
puts ("Bad data crc\n");
return 1;
}
}
if (!image_check_type (hdr, IH_TYPE_SCRIPT)) {
puts ("Bad image type\n");
return 1;
}
/* get length of script */
data = (ulong *)image_get_data (hdr);
if ((len = uimage_to_cpu (*data)) == 0) {
puts ("Empty Script\n");
return 1;
}
/*
* scripts are just multi-image files with one component, seek
* past the zero-terminated sequence of image lengths to get
* to the actual image data
*/
while (*data++);
break;
#endif
#if defined(CONFIG_FIT)
case IMAGE_FORMAT_FIT:
if (fit_uname == NULL) {
puts ("No FIT subimage unit name\n");
return 1;
}
fit_hdr = buf;
if (!fit_check_format (fit_hdr)) {
puts ("Bad FIT image format\n");
return 1;
}
/* get script component image node offset */
noffset = fit_image_get_node (fit_hdr, fit_uname);
if (noffset < 0) {
printf ("Can't find '%s' FIT subimage\n", fit_uname);
return 1;
}
if (!fit_image_check_type (fit_hdr, noffset, IH_TYPE_SCRIPT)) {
puts ("Not a image image\n");
return 1;
}
/* verify integrity */
if (verify) {
if (!fit_image_verify(fit_hdr, noffset)) {
puts ("Bad Data Hash\n");
return 1;
}
}
/* get script subimage data address and length */
if (fit_image_get_data (fit_hdr, noffset, &fit_data, &fit_len)) {
puts ("Could not find script subimage data\n");
return 1;
}
data = (ulong *)fit_data;
len = (ulong)fit_len;
break;
#endif
default:
puts ("Wrong image format for \"source\" command\n");
return 1;
}
debug ("** Script length: %ld\n", len);
return run_command_list((char *)data, len, 0);
}
/**************************************************/
#if defined(CONFIG_CMD_SOURCE)
static int do_source(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
ulong addr;
int rcode;
const char *fit_uname = NULL;
/* Find script image */
if (argc < 2) {
addr = CONFIG_SYS_LOAD_ADDR;
debug ("* source: default load address = 0x%08lx\n", addr);
#if defined(CONFIG_FIT)
} else if (fit_parse_subimage (argv[1], load_addr, &addr, &fit_uname)) {
debug ("* source: subimage '%s' from FIT image at 0x%08lx\n",
fit_uname, addr);
#endif
} else {
addr = simple_strtoul(argv[1], NULL, 16);
debug ("* source: cmdline image address = 0x%08lx\n", addr);
}
printf ("## Executing script at %08lx\n", addr);
rcode = source (addr, fit_uname);
return rcode;
}
#ifdef CONFIG_SYS_LONGHELP
static char source_help_text[] =
"[addr]\n"
"\t- run script starting at addr\n"
"\t- A valid image header must be present"
#if defined(CONFIG_FIT)
"\n"
"For FIT format uImage addr must include subimage\n"
"unit name in the form of addr:<subimg_uname>"
#endif
"";
#endif
U_BOOT_CMD(
source, 2, 0, do_source,
"run script from memory", source_help_text
);
#endif