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-rw-r--r--qemu/roms/u-boot/tools/env/.gitignore2
-rw-r--r--qemu/roms/u-boot/tools/env/Makefile34
-rw-r--r--qemu/roms/u-boot/tools/env/README60
-rw-r--r--qemu/roms/u-boot/tools/env/aes.c1
-rw-r--r--qemu/roms/u-boot/tools/env/crc32.c1
-rw-r--r--qemu/roms/u-boot/tools/env/ctype.c1
-rw-r--r--qemu/roms/u-boot/tools/env/env_attr.c1
-rw-r--r--qemu/roms/u-boot/tools/env/env_flags.c1
-rw-r--r--qemu/roms/u-boot/tools/env/fw_env.c1467
-rw-r--r--qemu/roms/u-boot/tools/env/fw_env.config22
-rw-r--r--qemu/roms/u-boot/tools/env/fw_env.h63
-rw-r--r--qemu/roms/u-boot/tools/env/fw_env_main.c147
-rw-r--r--qemu/roms/u-boot/tools/env/linux_string.c1
13 files changed, 1801 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/tools/env/.gitignore b/qemu/roms/u-boot/tools/env/.gitignore
new file mode 100644
index 000000000..804abacc6
--- /dev/null
+++ b/qemu/roms/u-boot/tools/env/.gitignore
@@ -0,0 +1,2 @@
+fw_printenv
+fw_printenv_unstripped
diff --git a/qemu/roms/u-boot/tools/env/Makefile b/qemu/roms/u-boot/tools/env/Makefile
new file mode 100644
index 000000000..f5368bc4d
--- /dev/null
+++ b/qemu/roms/u-boot/tools/env/Makefile
@@ -0,0 +1,34 @@
+#
+# (C) Copyright 2002-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+
+# fw_printenv is supposed to run on the target system, which means it should be
+# built with cross tools. Although it may look weird, we only replace "HOSTCC"
+# with "CC" here for the maximum code reuse of scripts/Makefile.host.
+HOSTCC = $(CC)
+
+# Compile for a hosted environment on the target
+HOST_EXTRACFLAGS = $(patsubst -I%,-idirafter%, $(UBOOTINCLUDE)) \
+ -idirafter $(srctree)/tools/env \
+ -DUSE_HOSTCC \
+ -DTEXT_BASE=$(TEXT_BASE)
+
+ifeq ($(MTD_VERSION),old)
+HOST_EXTRACFLAGS += -DMTD_OLD
+endif
+
+always := fw_printenv
+hostprogs-y := fw_printenv_unstripped
+
+fw_printenv_unstripped-objs := fw_env.o fw_env_main.o \
+ crc32.o ctype.o linux_string.o \
+ env_attr.o env_flags.o aes.o
+
+quiet_cmd_strip = STRIP $@
+ cmd_strip = $(STRIP) -o $@ $<
+
+$(obj)/fw_printenv: $(obj)/fw_printenv_unstripped FORCE
+ $(call if_changed,strip)
diff --git a/qemu/roms/u-boot/tools/env/README b/qemu/roms/u-boot/tools/env/README
new file mode 100644
index 000000000..24e31bc9f
--- /dev/null
+++ b/qemu/roms/u-boot/tools/env/README
@@ -0,0 +1,60 @@
+
+This is a demo implementation of a Linux command line tool to access
+the U-Boot's environment variables.
+
+In order to cross-compile fw_printenv, run
+ make CROSS_COMPILE=<your cross-compiler prefix> env
+in the root directory of the U-Boot distribution. For example,
+ make CROSS_COMPILE=arm-linux- env
+
+For the run-time utility configuration uncomment the line
+#define CONFIG_FILE "/etc/fw_env.config"
+in fw_env.h.
+
+For building against older versions of the MTD headers (meaning before
+v2.6.8-rc1) it is required to pass the argument "MTD_VERSION=old" to
+make.
+
+See comments in the fw_env.config file for definitions for the
+particular board.
+
+Configuration can also be done via #defines in the fw_env.h file. The
+following lines are relevant:
+
+#define HAVE_REDUND /* For systems with 2 env sectors */
+#define DEVICE1_NAME "/dev/mtd1"
+#define DEVICE2_NAME "/dev/mtd2"
+#define DEVICE1_OFFSET 0x0000
+#define ENV1_SIZE 0x4000
+#define DEVICE1_ESIZE 0x4000
+#define DEVICE1_ENVSECTORS 2
+#define DEVICE2_OFFSET 0x0000
+#define ENV2_SIZE 0x4000
+#define DEVICE2_ESIZE 0x4000
+#define DEVICE2_ENVSECTORS 2
+
+Un-define HAVE_REDUND, if you want to use the utilities on a system
+that does not have support for redundant environment enabled.
+If HAVE_REDUND is undefined, DEVICE2_NAME is ignored,
+as is ENV2_SIZE and DEVICE2_ESIZE.
+
+The DEVICEx_NAME constants define which MTD character devices are to
+be used to access the environment.
+
+The DEVICEx_OFFSET constants define the environment offset within the
+MTD character device.
+
+ENVx_SIZE defines the size in bytes taken by the environment, which
+may be less then flash sector size, if the environment takes less
+then 1 sector.
+
+DEVICEx_ESIZE defines the size of the first sector in the flash
+partition where the environment resides.
+
+DEVICEx_ENVSECTORS defines the number of sectors that may be used for
+this environment instance. On NAND this is used to limit the range
+within which bad blocks are skipped, on NOR it is not used.
+
+To prevent losing changes to the environment and to prevent confusing the MTD
+drivers, a lock file at /var/lock/fw_printenv.lock is used to serialize access
+to the environment.
diff --git a/qemu/roms/u-boot/tools/env/aes.c b/qemu/roms/u-boot/tools/env/aes.c
new file mode 100644
index 000000000..9e42679e3
--- /dev/null
+++ b/qemu/roms/u-boot/tools/env/aes.c
@@ -0,0 +1 @@
+#include "../../lib/aes.c"
diff --git a/qemu/roms/u-boot/tools/env/crc32.c b/qemu/roms/u-boot/tools/env/crc32.c
new file mode 100644
index 000000000..34f8178e3
--- /dev/null
+++ b/qemu/roms/u-boot/tools/env/crc32.c
@@ -0,0 +1 @@
+#include "../../lib/crc32.c"
diff --git a/qemu/roms/u-boot/tools/env/ctype.c b/qemu/roms/u-boot/tools/env/ctype.c
new file mode 100644
index 000000000..21050e937
--- /dev/null
+++ b/qemu/roms/u-boot/tools/env/ctype.c
@@ -0,0 +1 @@
+#include "../../lib/ctype.c"
diff --git a/qemu/roms/u-boot/tools/env/env_attr.c b/qemu/roms/u-boot/tools/env/env_attr.c
new file mode 100644
index 000000000..502d4c900
--- /dev/null
+++ b/qemu/roms/u-boot/tools/env/env_attr.c
@@ -0,0 +1 @@
+#include "../../common/env_attr.c"
diff --git a/qemu/roms/u-boot/tools/env/env_flags.c b/qemu/roms/u-boot/tools/env/env_flags.c
new file mode 100644
index 000000000..b261cb8e3
--- /dev/null
+++ b/qemu/roms/u-boot/tools/env/env_flags.c
@@ -0,0 +1 @@
+#include "../../common/env_flags.c"
diff --git a/qemu/roms/u-boot/tools/env/fw_env.c b/qemu/roms/u-boot/tools/env/fw_env.c
new file mode 100644
index 000000000..30d5b037f
--- /dev/null
+++ b/qemu/roms/u-boot/tools/env/fw_env.c
@@ -0,0 +1,1467 @@
+/*
+ * (C) Copyright 2000-2010
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2008
+ * Guennadi Liakhovetski, DENX Software Engineering, lg@denx.de.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <errno.h>
+#include <env_flags.h>
+#include <fcntl.h>
+#include <linux/stringify.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#ifdef MTD_OLD
+# include <stdint.h>
+# include <linux/mtd/mtd.h>
+#else
+# define __user /* nothing */
+# include <mtd/mtd-user.h>
+#endif
+
+#include "fw_env.h"
+
+#include <aes.h>
+
+#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
+
+#define WHITESPACE(c) ((c == '\t') || (c == ' '))
+
+#define min(x, y) ({ \
+ typeof(x) _min1 = (x); \
+ typeof(y) _min2 = (y); \
+ (void) (&_min1 == &_min2); \
+ _min1 < _min2 ? _min1 : _min2; })
+
+struct envdev_s {
+ const char *devname; /* Device name */
+ ulong devoff; /* Device offset */
+ ulong env_size; /* environment size */
+ ulong erase_size; /* device erase size */
+ ulong env_sectors; /* number of environment sectors */
+ uint8_t mtd_type; /* type of the MTD device */
+};
+
+static struct envdev_s envdevices[2] =
+{
+ {
+ .mtd_type = MTD_ABSENT,
+ }, {
+ .mtd_type = MTD_ABSENT,
+ },
+};
+static int dev_current;
+
+#define DEVNAME(i) envdevices[(i)].devname
+#define DEVOFFSET(i) envdevices[(i)].devoff
+#define ENVSIZE(i) envdevices[(i)].env_size
+#define DEVESIZE(i) envdevices[(i)].erase_size
+#define ENVSECTORS(i) envdevices[(i)].env_sectors
+#define DEVTYPE(i) envdevices[(i)].mtd_type
+
+#define CUR_ENVSIZE ENVSIZE(dev_current)
+
+#define ENV_SIZE getenvsize()
+
+struct env_image_single {
+ uint32_t crc; /* CRC32 over data bytes */
+ char data[];
+};
+
+struct env_image_redundant {
+ uint32_t crc; /* CRC32 over data bytes */
+ unsigned char flags; /* active or obsolete */
+ char data[];
+};
+
+enum flag_scheme {
+ FLAG_NONE,
+ FLAG_BOOLEAN,
+ FLAG_INCREMENTAL,
+};
+
+struct environment {
+ void *image;
+ uint32_t *crc;
+ unsigned char *flags;
+ char *data;
+ enum flag_scheme flag_scheme;
+};
+
+static struct environment environment = {
+ .flag_scheme = FLAG_NONE,
+};
+
+/* Is AES encryption used? */
+static int aes_flag;
+static uint8_t aes_key[AES_KEY_LENGTH] = { 0 };
+static int env_aes_cbc_crypt(char *data, const int enc);
+
+static int HaveRedundEnv = 0;
+
+static unsigned char active_flag = 1;
+/* obsolete_flag must be 0 to efficiently set it on NOR flash without erasing */
+static unsigned char obsolete_flag = 0;
+
+#define DEFAULT_ENV_INSTANCE_STATIC
+#include <env_default.h>
+
+static int flash_io (int mode);
+static char *envmatch (char * s1, char * s2);
+static int parse_config (void);
+
+#if defined(CONFIG_FILE)
+static int get_config (char *);
+#endif
+static inline ulong getenvsize (void)
+{
+ ulong rc = CUR_ENVSIZE - sizeof(long);
+
+ if (HaveRedundEnv)
+ rc -= sizeof (char);
+
+ if (aes_flag)
+ rc &= ~(AES_KEY_LENGTH - 1);
+
+ return rc;
+}
+
+static char *fw_string_blank(char *s, int noblank)
+{
+ int i;
+ int len = strlen(s);
+
+ for (i = 0; i < len; i++, s++) {
+ if ((noblank && !WHITESPACE(*s)) ||
+ (!noblank && WHITESPACE(*s)))
+ break;
+ }
+ if (i == len)
+ return NULL;
+
+ return s;
+}
+
+/*
+ * Search the environment for a variable.
+ * Return the value, if found, or NULL, if not found.
+ */
+char *fw_getenv (char *name)
+{
+ char *env, *nxt;
+
+ for (env = environment.data; *env; env = nxt + 1) {
+ char *val;
+
+ for (nxt = env; *nxt; ++nxt) {
+ if (nxt >= &environment.data[ENV_SIZE]) {
+ fprintf (stderr, "## Error: "
+ "environment not terminated\n");
+ return NULL;
+ }
+ }
+ val = envmatch (name, env);
+ if (!val)
+ continue;
+ return val;
+ }
+ return NULL;
+}
+
+/*
+ * Search the default environment for a variable.
+ * Return the value, if found, or NULL, if not found.
+ */
+char *fw_getdefenv(char *name)
+{
+ char *env, *nxt;
+
+ for (env = default_environment; *env; env = nxt + 1) {
+ char *val;
+
+ for (nxt = env; *nxt; ++nxt) {
+ if (nxt >= &default_environment[ENV_SIZE]) {
+ fprintf(stderr, "## Error: "
+ "default environment not terminated\n");
+ return NULL;
+ }
+ }
+ val = envmatch(name, env);
+ if (!val)
+ continue;
+ return val;
+ }
+ return NULL;
+}
+
+static int parse_aes_key(char *key)
+{
+ char tmp[5] = { '0', 'x', 0, 0, 0 };
+ unsigned long ul;
+ int i;
+
+ if (strnlen(key, 64) != 32) {
+ fprintf(stderr,
+ "## Error: '-a' option requires 16-byte AES key\n");
+ return -1;
+ }
+
+ for (i = 0; i < 16; i++) {
+ tmp[2] = key[0];
+ tmp[3] = key[1];
+ errno = 0;
+ ul = strtoul(tmp, NULL, 16);
+ if (errno) {
+ fprintf(stderr,
+ "## Error: '-a' option requires valid AES key\n");
+ return -1;
+ }
+ aes_key[i] = ul & 0xff;
+ key += 2;
+ }
+ aes_flag = 1;
+
+ return 0;
+}
+
+/*
+ * Print the current definition of one, or more, or all
+ * environment variables
+ */
+int fw_printenv (int argc, char *argv[])
+{
+ char *env, *nxt;
+ int i, n_flag;
+ int rc = 0;
+
+ if (argc >= 2 && strcmp(argv[1], "-a") == 0) {
+ if (argc < 3) {
+ fprintf(stderr,
+ "## Error: '-a' option requires AES key\n");
+ return -1;
+ }
+ rc = parse_aes_key(argv[2]);
+ if (rc)
+ return rc;
+ argv += 2;
+ argc -= 2;
+ }
+
+ if (fw_env_open())
+ return -1;
+
+ if (argc == 1) { /* Print all env variables */
+ for (env = environment.data; *env; env = nxt + 1) {
+ for (nxt = env; *nxt; ++nxt) {
+ if (nxt >= &environment.data[ENV_SIZE]) {
+ fprintf (stderr, "## Error: "
+ "environment not terminated\n");
+ return -1;
+ }
+ }
+
+ printf ("%s\n", env);
+ }
+ return 0;
+ }
+
+ if (strcmp (argv[1], "-n") == 0) {
+ n_flag = 1;
+ ++argv;
+ --argc;
+ if (argc != 2) {
+ fprintf (stderr, "## Error: "
+ "`-n' option requires exactly one argument\n");
+ return -1;
+ }
+ } else {
+ n_flag = 0;
+ }
+
+ for (i = 1; i < argc; ++i) { /* print single env variables */
+ char *name = argv[i];
+ char *val = NULL;
+
+ for (env = environment.data; *env; env = nxt + 1) {
+
+ for (nxt = env; *nxt; ++nxt) {
+ if (nxt >= &environment.data[ENV_SIZE]) {
+ fprintf (stderr, "## Error: "
+ "environment not terminated\n");
+ return -1;
+ }
+ }
+ val = envmatch (name, env);
+ if (val) {
+ if (!n_flag) {
+ fputs (name, stdout);
+ putc ('=', stdout);
+ }
+ puts (val);
+ break;
+ }
+ }
+ if (!val) {
+ fprintf (stderr, "## Error: \"%s\" not defined\n", name);
+ rc = -1;
+ }
+ }
+
+ return rc;
+}
+
+int fw_env_close(void)
+{
+ int ret;
+ if (aes_flag) {
+ ret = env_aes_cbc_crypt(environment.data, 1);
+ if (ret) {
+ fprintf(stderr,
+ "Error: can't encrypt env for flash\n");
+ return ret;
+ }
+ }
+
+ /*
+ * Update CRC
+ */
+ *environment.crc = crc32(0, (uint8_t *) environment.data, ENV_SIZE);
+
+ /* write environment back to flash */
+ if (flash_io(O_RDWR)) {
+ fprintf(stderr,
+ "Error: can't write fw_env to flash\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+
+/*
+ * Set/Clear a single variable in the environment.
+ * This is called in sequence to update the environment
+ * in RAM without updating the copy in flash after each set
+ */
+int fw_env_write(char *name, char *value)
+{
+ int len;
+ char *env, *nxt;
+ char *oldval = NULL;
+ int deleting, creating, overwriting;
+
+ /*
+ * search if variable with this name already exists
+ */
+ for (nxt = env = environment.data; *env; env = nxt + 1) {
+ for (nxt = env; *nxt; ++nxt) {
+ if (nxt >= &environment.data[ENV_SIZE]) {
+ fprintf(stderr, "## Error: "
+ "environment not terminated\n");
+ errno = EINVAL;
+ return -1;
+ }
+ }
+ if ((oldval = envmatch (name, env)) != NULL)
+ break;
+ }
+
+ deleting = (oldval && !(value && strlen(value)));
+ creating = (!oldval && (value && strlen(value)));
+ overwriting = (oldval && (value && strlen(value)));
+
+ /* check for permission */
+ if (deleting) {
+ if (env_flags_validate_varaccess(name,
+ ENV_FLAGS_VARACCESS_PREVENT_DELETE)) {
+ printf("Can't delete \"%s\"\n", name);
+ errno = EROFS;
+ return -1;
+ }
+ } else if (overwriting) {
+ if (env_flags_validate_varaccess(name,
+ ENV_FLAGS_VARACCESS_PREVENT_OVERWR)) {
+ printf("Can't overwrite \"%s\"\n", name);
+ errno = EROFS;
+ return -1;
+ } else if (env_flags_validate_varaccess(name,
+ ENV_FLAGS_VARACCESS_PREVENT_NONDEF_OVERWR)) {
+ const char *defval = fw_getdefenv(name);
+
+ if (defval == NULL)
+ defval = "";
+ if (strcmp(oldval, defval)
+ != 0) {
+ printf("Can't overwrite \"%s\"\n", name);
+ errno = EROFS;
+ return -1;
+ }
+ }
+ } else if (creating) {
+ if (env_flags_validate_varaccess(name,
+ ENV_FLAGS_VARACCESS_PREVENT_CREATE)) {
+ printf("Can't create \"%s\"\n", name);
+ errno = EROFS;
+ return -1;
+ }
+ } else
+ /* Nothing to do */
+ return 0;
+
+ if (deleting || overwriting) {
+ if (*++nxt == '\0') {
+ *env = '\0';
+ } else {
+ for (;;) {
+ *env = *nxt++;
+ if ((*env == '\0') && (*nxt == '\0'))
+ break;
+ ++env;
+ }
+ }
+ *++env = '\0';
+ }
+
+ /* Delete only ? */
+ if (!value || !strlen(value))
+ return 0;
+
+ /*
+ * Append new definition at the end
+ */
+ for (env = environment.data; *env || *(env + 1); ++env);
+ if (env > environment.data)
+ ++env;
+ /*
+ * Overflow when:
+ * "name" + "=" + "val" +"\0\0" > CUR_ENVSIZE - (env-environment)
+ */
+ len = strlen (name) + 2;
+ /* add '=' for first arg, ' ' for all others */
+ len += strlen(value) + 1;
+
+ if (len > (&environment.data[ENV_SIZE] - env)) {
+ fprintf (stderr,
+ "Error: environment overflow, \"%s\" deleted\n",
+ name);
+ return -1;
+ }
+
+ while ((*env = *name++) != '\0')
+ env++;
+ *env = '=';
+ while ((*++env = *value++) != '\0')
+ ;
+
+ /* end is marked with double '\0' */
+ *++env = '\0';
+
+ return 0;
+}
+
+/*
+ * Deletes or sets environment variables. Returns -1 and sets errno error codes:
+ * 0 - OK
+ * EINVAL - need at least 1 argument
+ * EROFS - certain variables ("ethaddr", "serial#") cannot be
+ * modified or deleted
+ *
+ */
+int fw_setenv(int argc, char *argv[])
+{
+ int i, rc;
+ size_t len;
+ char *name;
+ char *value = NULL;
+
+ if (argc < 2) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (strcmp(argv[1], "-a") == 0) {
+ if (argc < 3) {
+ fprintf(stderr,
+ "## Error: '-a' option requires AES key\n");
+ return -1;
+ }
+ rc = parse_aes_key(argv[2]);
+ if (rc)
+ return rc;
+ argv += 2;
+ argc -= 2;
+ }
+
+ if (argc < 2) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (fw_env_open()) {
+ fprintf(stderr, "Error: environment not initialized\n");
+ return -1;
+ }
+
+ name = argv[1];
+
+ if (env_flags_validate_env_set_params(argc, argv) < 0)
+ return 1;
+
+ len = 0;
+ for (i = 2; i < argc; ++i) {
+ char *val = argv[i];
+ size_t val_len = strlen(val);
+
+ if (value)
+ value[len - 1] = ' ';
+ value = realloc(value, len + val_len + 1);
+ if (!value) {
+ fprintf(stderr,
+ "Cannot malloc %zu bytes: %s\n",
+ len, strerror(errno));
+ return -1;
+ }
+
+ memcpy(value + len, val, val_len);
+ len += val_len;
+ value[len++] = '\0';
+ }
+
+ fw_env_write(name, value);
+
+ free(value);
+
+ return fw_env_close();
+}
+
+/*
+ * Parse a file and configure the u-boot variables.
+ * The script file has a very simple format, as follows:
+ *
+ * Each line has a couple with name, value:
+ * <white spaces>variable_name<white spaces>variable_value
+ *
+ * Both variable_name and variable_value are interpreted as strings.
+ * Any character after <white spaces> and before ending \r\n is interpreted
+ * as variable's value (no comment allowed on these lines !)
+ *
+ * Comments are allowed if the first character in the line is #
+ *
+ * Returns -1 and sets errno error codes:
+ * 0 - OK
+ * -1 - Error
+ */
+int fw_parse_script(char *fname)
+{
+ FILE *fp;
+ char dump[1024]; /* Maximum line length in the file */
+ char *name;
+ char *val;
+ int lineno = 0;
+ int len;
+ int ret = 0;
+
+ if (fw_env_open()) {
+ fprintf(stderr, "Error: environment not initialized\n");
+ return -1;
+ }
+
+ if (strcmp(fname, "-") == 0)
+ fp = stdin;
+ else {
+ fp = fopen(fname, "r");
+ if (fp == NULL) {
+ fprintf(stderr, "I cannot open %s for reading\n",
+ fname);
+ return -1;
+ }
+ }
+
+ while (fgets(dump, sizeof(dump), fp)) {
+ lineno++;
+ len = strlen(dump);
+
+ /*
+ * Read a whole line from the file. If the line is too long
+ * or is not terminated, reports an error and exit.
+ */
+ if (dump[len - 1] != '\n') {
+ fprintf(stderr,
+ "Line %d not corrected terminated or too long\n",
+ lineno);
+ ret = -1;
+ break;
+ }
+
+ /* Drop ending line feed / carriage return */
+ while (len > 0 && (dump[len - 1] == '\n' ||
+ dump[len - 1] == '\r')) {
+ dump[len - 1] = '\0';
+ len--;
+ }
+
+ /* Skip comment or empty lines */
+ if ((len == 0) || dump[0] == '#')
+ continue;
+
+ /*
+ * Search for variable's name,
+ * remove leading whitespaces
+ */
+ name = fw_string_blank(dump, 1);
+ if (!name)
+ continue;
+
+ /* The first white space is the end of variable name */
+ val = fw_string_blank(name, 0);
+ len = strlen(name);
+ if (val) {
+ *val++ = '\0';
+ if ((val - name) < len)
+ val = fw_string_blank(val, 1);
+ else
+ val = NULL;
+ }
+
+#ifdef DEBUG
+ fprintf(stderr, "Setting %s : %s\n",
+ name, val ? val : " removed");
+#endif
+
+ if (env_flags_validate_type(name, val) < 0) {
+ ret = -1;
+ break;
+ }
+
+ /*
+ * If there is an error setting a variable,
+ * try to save the environment and returns an error
+ */
+ if (fw_env_write(name, val)) {
+ fprintf(stderr,
+ "fw_env_write returns with error : %s\n",
+ strerror(errno));
+ ret = -1;
+ break;
+ }
+
+ }
+
+ /* Close file if not stdin */
+ if (strcmp(fname, "-") != 0)
+ fclose(fp);
+
+ ret |= fw_env_close();
+
+ return ret;
+
+}
+
+/*
+ * Test for bad block on NAND, just returns 0 on NOR, on NAND:
+ * 0 - block is good
+ * > 0 - block is bad
+ * < 0 - failed to test
+ */
+static int flash_bad_block (int fd, uint8_t mtd_type, loff_t *blockstart)
+{
+ if (mtd_type == MTD_NANDFLASH) {
+ int badblock = ioctl (fd, MEMGETBADBLOCK, blockstart);
+
+ if (badblock < 0) {
+ perror ("Cannot read bad block mark");
+ return badblock;
+ }
+
+ if (badblock) {
+#ifdef DEBUG
+ fprintf (stderr, "Bad block at 0x%llx, "
+ "skipping\n", *blockstart);
+#endif
+ return badblock;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * Read data from flash at an offset into a provided buffer. On NAND it skips
+ * bad blocks but makes sure it stays within ENVSECTORS (dev) starting from
+ * the DEVOFFSET (dev) block. On NOR the loop is only run once.
+ */
+static int flash_read_buf (int dev, int fd, void *buf, size_t count,
+ off_t offset, uint8_t mtd_type)
+{
+ size_t blocklen; /* erase / write length - one block on NAND,
+ 0 on NOR */
+ size_t processed = 0; /* progress counter */
+ size_t readlen = count; /* current read length */
+ off_t top_of_range; /* end of the last block we may use */
+ off_t block_seek; /* offset inside the current block to the start
+ of the data */
+ loff_t blockstart; /* running start of the current block -
+ MEMGETBADBLOCK needs 64 bits */
+ int rc;
+
+ blockstart = (offset / DEVESIZE (dev)) * DEVESIZE (dev);
+
+ /* Offset inside a block */
+ block_seek = offset - blockstart;
+
+ if (mtd_type == MTD_NANDFLASH) {
+ /*
+ * NAND: calculate which blocks we are reading. We have
+ * to read one block at a time to skip bad blocks.
+ */
+ blocklen = DEVESIZE (dev);
+
+ /*
+ * To calculate the top of the range, we have to use the
+ * global DEVOFFSET (dev), which can be different from offset
+ */
+ top_of_range = ((DEVOFFSET(dev) / blocklen) +
+ ENVSECTORS (dev)) * blocklen;
+
+ /* Limit to one block for the first read */
+ if (readlen > blocklen - block_seek)
+ readlen = blocklen - block_seek;
+ } else {
+ blocklen = 0;
+ top_of_range = offset + count;
+ }
+
+ /* This only runs once on NOR flash */
+ while (processed < count) {
+ rc = flash_bad_block (fd, mtd_type, &blockstart);
+ if (rc < 0) /* block test failed */
+ return -1;
+
+ if (blockstart + block_seek + readlen > top_of_range) {
+ /* End of range is reached */
+ fprintf (stderr,
+ "Too few good blocks within range\n");
+ return -1;
+ }
+
+ if (rc) { /* block is bad */
+ blockstart += blocklen;
+ continue;
+ }
+
+ /*
+ * If a block is bad, we retry in the next block at the same
+ * offset - see common/env_nand.c::writeenv()
+ */
+ lseek (fd, blockstart + block_seek, SEEK_SET);
+
+ rc = read (fd, buf + processed, readlen);
+ if (rc != readlen) {
+ fprintf (stderr, "Read error on %s: %s\n",
+ DEVNAME (dev), strerror (errno));
+ return -1;
+ }
+#ifdef DEBUG
+ fprintf(stderr, "Read 0x%x bytes at 0x%llx on %s\n",
+ rc, blockstart + block_seek, DEVNAME(dev));
+#endif
+ processed += readlen;
+ readlen = min (blocklen, count - processed);
+ block_seek = 0;
+ blockstart += blocklen;
+ }
+
+ return processed;
+}
+
+/*
+ * Write count bytes at offset, but stay within ENVSECTORS (dev) sectors of
+ * DEVOFFSET (dev). Similar to the read case above, on NOR and dataflash we
+ * erase and write the whole data at once.
+ */
+static int flash_write_buf (int dev, int fd, void *buf, size_t count,
+ off_t offset, uint8_t mtd_type)
+{
+ void *data;
+ struct erase_info_user erase;
+ size_t blocklen; /* length of NAND block / NOR erase sector */
+ size_t erase_len; /* whole area that can be erased - may include
+ bad blocks */
+ size_t erasesize; /* erase / write length - one block on NAND,
+ whole area on NOR */
+ size_t processed = 0; /* progress counter */
+ size_t write_total; /* total size to actually write - excluding
+ bad blocks */
+ off_t erase_offset; /* offset to the first erase block (aligned)
+ below offset */
+ off_t block_seek; /* offset inside the erase block to the start
+ of the data */
+ off_t top_of_range; /* end of the last block we may use */
+ loff_t blockstart; /* running start of the current block -
+ MEMGETBADBLOCK needs 64 bits */
+ int rc;
+
+ /*
+ * For mtd devices only offset and size of the environment do matter
+ */
+ if (mtd_type == MTD_ABSENT) {
+ blocklen = count;
+ top_of_range = offset + count;
+ erase_len = blocklen;
+ blockstart = offset;
+ block_seek = 0;
+ write_total = blocklen;
+ } else {
+ blocklen = DEVESIZE(dev);
+
+ top_of_range = ((DEVOFFSET(dev) / blocklen) +
+ ENVSECTORS(dev)) * blocklen;
+
+ erase_offset = (offset / blocklen) * blocklen;
+
+ /* Maximum area we may use */
+ erase_len = top_of_range - erase_offset;
+
+ blockstart = erase_offset;
+ /* Offset inside a block */
+ block_seek = offset - erase_offset;
+
+ /*
+ * Data size we actually write: from the start of the block
+ * to the start of the data, then count bytes of data, and
+ * to the end of the block
+ */
+ write_total = ((block_seek + count + blocklen - 1) /
+ blocklen) * blocklen;
+ }
+
+ /*
+ * Support data anywhere within erase sectors: read out the complete
+ * area to be erased, replace the environment image, write the whole
+ * block back again.
+ */
+ if (write_total > count) {
+ data = malloc (erase_len);
+ if (!data) {
+ fprintf (stderr,
+ "Cannot malloc %zu bytes: %s\n",
+ erase_len, strerror (errno));
+ return -1;
+ }
+
+ rc = flash_read_buf (dev, fd, data, write_total, erase_offset,
+ mtd_type);
+ if (write_total != rc)
+ return -1;
+
+#ifdef DEBUG
+ fprintf(stderr, "Preserving data ");
+ if (block_seek != 0)
+ fprintf(stderr, "0x%x - 0x%lx", 0, block_seek - 1);
+ if (block_seek + count != write_total) {
+ if (block_seek != 0)
+ fprintf(stderr, " and ");
+ fprintf(stderr, "0x%lx - 0x%x",
+ block_seek + count, write_total - 1);
+ }
+ fprintf(stderr, "\n");
+#endif
+ /* Overwrite the old environment */
+ memcpy (data + block_seek, buf, count);
+ } else {
+ /*
+ * We get here, iff offset is block-aligned and count is a
+ * multiple of blocklen - see write_total calculation above
+ */
+ data = buf;
+ }
+
+ if (mtd_type == MTD_NANDFLASH) {
+ /*
+ * NAND: calculate which blocks we are writing. We have
+ * to write one block at a time to skip bad blocks.
+ */
+ erasesize = blocklen;
+ } else {
+ erasesize = erase_len;
+ }
+
+ erase.length = erasesize;
+
+ /* This only runs once on NOR flash and SPI-dataflash */
+ while (processed < write_total) {
+ rc = flash_bad_block (fd, mtd_type, &blockstart);
+ if (rc < 0) /* block test failed */
+ return rc;
+
+ if (blockstart + erasesize > top_of_range) {
+ fprintf (stderr, "End of range reached, aborting\n");
+ return -1;
+ }
+
+ if (rc) { /* block is bad */
+ blockstart += blocklen;
+ continue;
+ }
+
+ if (mtd_type != MTD_ABSENT) {
+ erase.start = blockstart;
+ ioctl(fd, MEMUNLOCK, &erase);
+ /* These do not need an explicit erase cycle */
+ if (mtd_type != MTD_DATAFLASH)
+ if (ioctl(fd, MEMERASE, &erase) != 0) {
+ fprintf(stderr,
+ "MTD erase error on %s: %s\n",
+ DEVNAME(dev), strerror(errno));
+ return -1;
+ }
+ }
+
+ if (lseek (fd, blockstart, SEEK_SET) == -1) {
+ fprintf (stderr,
+ "Seek error on %s: %s\n",
+ DEVNAME (dev), strerror (errno));
+ return -1;
+ }
+
+#ifdef DEBUG
+ fprintf(stderr, "Write 0x%x bytes at 0x%llx\n", erasesize,
+ blockstart);
+#endif
+ if (write (fd, data + processed, erasesize) != erasesize) {
+ fprintf (stderr, "Write error on %s: %s\n",
+ DEVNAME (dev), strerror (errno));
+ return -1;
+ }
+
+ if (mtd_type != MTD_ABSENT)
+ ioctl(fd, MEMLOCK, &erase);
+
+ processed += erasesize;
+ block_seek = 0;
+ blockstart += erasesize;
+ }
+
+ if (write_total > count)
+ free (data);
+
+ return processed;
+}
+
+/*
+ * Set obsolete flag at offset - NOR flash only
+ */
+static int flash_flag_obsolete (int dev, int fd, off_t offset)
+{
+ int rc;
+ struct erase_info_user erase;
+
+ erase.start = DEVOFFSET (dev);
+ erase.length = DEVESIZE (dev);
+ /* This relies on the fact, that obsolete_flag == 0 */
+ rc = lseek (fd, offset, SEEK_SET);
+ if (rc < 0) {
+ fprintf (stderr, "Cannot seek to set the flag on %s \n",
+ DEVNAME (dev));
+ return rc;
+ }
+ ioctl (fd, MEMUNLOCK, &erase);
+ rc = write (fd, &obsolete_flag, sizeof (obsolete_flag));
+ ioctl (fd, MEMLOCK, &erase);
+ if (rc < 0)
+ perror ("Could not set obsolete flag");
+
+ return rc;
+}
+
+/* Encrypt or decrypt the environment before writing or reading it. */
+static int env_aes_cbc_crypt(char *payload, const int enc)
+{
+ uint8_t *data = (uint8_t *)payload;
+ const int len = getenvsize();
+ uint8_t key_exp[AES_EXPAND_KEY_LENGTH];
+ uint32_t aes_blocks;
+
+ /* First we expand the key. */
+ aes_expand_key(aes_key, key_exp);
+
+ /* Calculate the number of AES blocks to encrypt. */
+ aes_blocks = DIV_ROUND_UP(len, AES_KEY_LENGTH);
+
+ if (enc)
+ aes_cbc_encrypt_blocks(key_exp, data, data, aes_blocks);
+ else
+ aes_cbc_decrypt_blocks(key_exp, data, data, aes_blocks);
+
+ return 0;
+}
+
+static int flash_write (int fd_current, int fd_target, int dev_target)
+{
+ int rc;
+
+ switch (environment.flag_scheme) {
+ case FLAG_NONE:
+ break;
+ case FLAG_INCREMENTAL:
+ (*environment.flags)++;
+ break;
+ case FLAG_BOOLEAN:
+ *environment.flags = active_flag;
+ break;
+ default:
+ fprintf (stderr, "Unimplemented flash scheme %u \n",
+ environment.flag_scheme);
+ return -1;
+ }
+
+#ifdef DEBUG
+ fprintf(stderr, "Writing new environment at 0x%lx on %s\n",
+ DEVOFFSET (dev_target), DEVNAME (dev_target));
+#endif
+
+ rc = flash_write_buf(dev_target, fd_target, environment.image,
+ CUR_ENVSIZE, DEVOFFSET(dev_target),
+ DEVTYPE(dev_target));
+ if (rc < 0)
+ return rc;
+
+ if (environment.flag_scheme == FLAG_BOOLEAN) {
+ /* Have to set obsolete flag */
+ off_t offset = DEVOFFSET (dev_current) +
+ offsetof (struct env_image_redundant, flags);
+#ifdef DEBUG
+ fprintf(stderr,
+ "Setting obsolete flag in environment at 0x%lx on %s\n",
+ DEVOFFSET (dev_current), DEVNAME (dev_current));
+#endif
+ flash_flag_obsolete (dev_current, fd_current, offset);
+ }
+
+ return 0;
+}
+
+static int flash_read (int fd)
+{
+ struct mtd_info_user mtdinfo;
+ struct stat st;
+ int rc;
+
+ rc = fstat(fd, &st);
+ if (rc < 0) {
+ fprintf(stderr, "Cannot stat the file %s\n",
+ DEVNAME(dev_current));
+ return -1;
+ }
+
+ if (S_ISCHR(st.st_mode)) {
+ rc = ioctl(fd, MEMGETINFO, &mtdinfo);
+ if (rc < 0) {
+ fprintf(stderr, "Cannot get MTD information for %s\n",
+ DEVNAME(dev_current));
+ return -1;
+ }
+ if (mtdinfo.type != MTD_NORFLASH &&
+ mtdinfo.type != MTD_NANDFLASH &&
+ mtdinfo.type != MTD_DATAFLASH &&
+ mtdinfo.type != MTD_UBIVOLUME) {
+ fprintf (stderr, "Unsupported flash type %u on %s\n",
+ mtdinfo.type, DEVNAME(dev_current));
+ return -1;
+ }
+ } else {
+ memset(&mtdinfo, 0, sizeof(mtdinfo));
+ mtdinfo.type = MTD_ABSENT;
+ }
+
+ DEVTYPE(dev_current) = mtdinfo.type;
+
+ rc = flash_read_buf(dev_current, fd, environment.image, CUR_ENVSIZE,
+ DEVOFFSET (dev_current), mtdinfo.type);
+ if (rc != CUR_ENVSIZE)
+ return -1;
+
+ return 0;
+}
+
+static int flash_io (int mode)
+{
+ int fd_current, fd_target, rc, dev_target;
+
+ /* dev_current: fd_current, erase_current */
+ fd_current = open (DEVNAME (dev_current), mode);
+ if (fd_current < 0) {
+ fprintf (stderr,
+ "Can't open %s: %s\n",
+ DEVNAME (dev_current), strerror (errno));
+ return -1;
+ }
+
+ if (mode == O_RDWR) {
+ if (HaveRedundEnv) {
+ /* switch to next partition for writing */
+ dev_target = !dev_current;
+ /* dev_target: fd_target, erase_target */
+ fd_target = open (DEVNAME (dev_target), mode);
+ if (fd_target < 0) {
+ fprintf (stderr,
+ "Can't open %s: %s\n",
+ DEVNAME (dev_target),
+ strerror (errno));
+ rc = -1;
+ goto exit;
+ }
+ } else {
+ dev_target = dev_current;
+ fd_target = fd_current;
+ }
+
+ rc = flash_write (fd_current, fd_target, dev_target);
+
+ if (HaveRedundEnv) {
+ if (close (fd_target)) {
+ fprintf (stderr,
+ "I/O error on %s: %s\n",
+ DEVNAME (dev_target),
+ strerror (errno));
+ rc = -1;
+ }
+ }
+ } else {
+ rc = flash_read (fd_current);
+ }
+
+exit:
+ if (close (fd_current)) {
+ fprintf (stderr,
+ "I/O error on %s: %s\n",
+ DEVNAME (dev_current), strerror (errno));
+ return -1;
+ }
+
+ return rc;
+}
+
+/*
+ * s1 is either a simple 'name', or a 'name=value' pair.
+ * s2 is a 'name=value' pair.
+ * If the names match, return the value of s2, else NULL.
+ */
+
+static char *envmatch (char * s1, char * s2)
+{
+ if (s1 == NULL || s2 == NULL)
+ return NULL;
+
+ while (*s1 == *s2++)
+ if (*s1++ == '=')
+ return s2;
+ if (*s1 == '\0' && *(s2 - 1) == '=')
+ return s2;
+ return NULL;
+}
+
+/*
+ * Prevent confusion if running from erased flash memory
+ */
+int fw_env_open(void)
+{
+ int crc0, crc0_ok;
+ unsigned char flag0;
+ void *addr0;
+
+ int crc1, crc1_ok;
+ unsigned char flag1;
+ void *addr1;
+
+ int ret;
+
+ struct env_image_single *single;
+ struct env_image_redundant *redundant;
+
+ if (parse_config ()) /* should fill envdevices */
+ return -1;
+
+ addr0 = calloc(1, CUR_ENVSIZE);
+ if (addr0 == NULL) {
+ fprintf(stderr,
+ "Not enough memory for environment (%ld bytes)\n",
+ CUR_ENVSIZE);
+ return -1;
+ }
+
+ /* read environment from FLASH to local buffer */
+ environment.image = addr0;
+
+ if (HaveRedundEnv) {
+ redundant = addr0;
+ environment.crc = &redundant->crc;
+ environment.flags = &redundant->flags;
+ environment.data = redundant->data;
+ } else {
+ single = addr0;
+ environment.crc = &single->crc;
+ environment.flags = NULL;
+ environment.data = single->data;
+ }
+
+ dev_current = 0;
+ if (flash_io (O_RDONLY))
+ return -1;
+
+ crc0 = crc32 (0, (uint8_t *) environment.data, ENV_SIZE);
+
+ if (aes_flag) {
+ ret = env_aes_cbc_crypt(environment.data, 0);
+ if (ret)
+ return ret;
+ }
+
+ crc0_ok = (crc0 == *environment.crc);
+ if (!HaveRedundEnv) {
+ if (!crc0_ok) {
+ fprintf (stderr,
+ "Warning: Bad CRC, using default environment\n");
+ memcpy(environment.data, default_environment, sizeof default_environment);
+ }
+ } else {
+ flag0 = *environment.flags;
+
+ dev_current = 1;
+ addr1 = calloc(1, CUR_ENVSIZE);
+ if (addr1 == NULL) {
+ fprintf(stderr,
+ "Not enough memory for environment (%ld bytes)\n",
+ CUR_ENVSIZE);
+ return -1;
+ }
+ redundant = addr1;
+
+ /*
+ * have to set environment.image for flash_read(), careful -
+ * other pointers in environment still point inside addr0
+ */
+ environment.image = addr1;
+ if (flash_io (O_RDONLY))
+ return -1;
+
+ /* Check flag scheme compatibility */
+ if (DEVTYPE(dev_current) == MTD_NORFLASH &&
+ DEVTYPE(!dev_current) == MTD_NORFLASH) {
+ environment.flag_scheme = FLAG_BOOLEAN;
+ } else if (DEVTYPE(dev_current) == MTD_NANDFLASH &&
+ DEVTYPE(!dev_current) == MTD_NANDFLASH) {
+ environment.flag_scheme = FLAG_INCREMENTAL;
+ } else if (DEVTYPE(dev_current) == MTD_DATAFLASH &&
+ DEVTYPE(!dev_current) == MTD_DATAFLASH) {
+ environment.flag_scheme = FLAG_BOOLEAN;
+ } else if (DEVTYPE(dev_current) == MTD_UBIVOLUME &&
+ DEVTYPE(!dev_current) == MTD_UBIVOLUME) {
+ environment.flag_scheme = FLAG_INCREMENTAL;
+ } else if (DEVTYPE(dev_current) == MTD_ABSENT &&
+ DEVTYPE(!dev_current) == MTD_ABSENT) {
+ environment.flag_scheme = FLAG_INCREMENTAL;
+ } else {
+ fprintf (stderr, "Incompatible flash types!\n");
+ return -1;
+ }
+
+ crc1 = crc32 (0, (uint8_t *) redundant->data, ENV_SIZE);
+
+ if (aes_flag) {
+ ret = env_aes_cbc_crypt(redundant->data, 0);
+ if (ret)
+ return ret;
+ }
+
+ crc1_ok = (crc1 == redundant->crc);
+ flag1 = redundant->flags;
+
+ if (crc0_ok && !crc1_ok) {
+ dev_current = 0;
+ } else if (!crc0_ok && crc1_ok) {
+ dev_current = 1;
+ } else if (!crc0_ok && !crc1_ok) {
+ fprintf (stderr,
+ "Warning: Bad CRC, using default environment\n");
+ memcpy (environment.data, default_environment,
+ sizeof default_environment);
+ dev_current = 0;
+ } else {
+ switch (environment.flag_scheme) {
+ case FLAG_BOOLEAN:
+ if (flag0 == active_flag &&
+ flag1 == obsolete_flag) {
+ dev_current = 0;
+ } else if (flag0 == obsolete_flag &&
+ flag1 == active_flag) {
+ dev_current = 1;
+ } else if (flag0 == flag1) {
+ dev_current = 0;
+ } else if (flag0 == 0xFF) {
+ dev_current = 0;
+ } else if (flag1 == 0xFF) {
+ dev_current = 1;
+ } else {
+ dev_current = 0;
+ }
+ break;
+ case FLAG_INCREMENTAL:
+ if (flag0 == 255 && flag1 == 0)
+ dev_current = 1;
+ else if ((flag1 == 255 && flag0 == 0) ||
+ flag0 >= flag1)
+ dev_current = 0;
+ else /* flag1 > flag0 */
+ dev_current = 1;
+ break;
+ default:
+ fprintf (stderr, "Unknown flag scheme %u \n",
+ environment.flag_scheme);
+ return -1;
+ }
+ }
+
+ /*
+ * If we are reading, we don't need the flag and the CRC any
+ * more, if we are writing, we will re-calculate CRC and update
+ * flags before writing out
+ */
+ if (dev_current) {
+ environment.image = addr1;
+ environment.crc = &redundant->crc;
+ environment.flags = &redundant->flags;
+ environment.data = redundant->data;
+ free (addr0);
+ } else {
+ environment.image = addr0;
+ /* Other pointers are already set */
+ free (addr1);
+ }
+#ifdef DEBUG
+ fprintf(stderr, "Selected env in %s\n", DEVNAME(dev_current));
+#endif
+ }
+ return 0;
+}
+
+
+static int parse_config ()
+{
+ struct stat st;
+
+#if defined(CONFIG_FILE)
+ /* Fills in DEVNAME(), ENVSIZE(), DEVESIZE(). Or don't. */
+ if (get_config (CONFIG_FILE)) {
+ fprintf (stderr,
+ "Cannot parse config file: %s\n", strerror (errno));
+ return -1;
+ }
+#else
+ DEVNAME (0) = DEVICE1_NAME;
+ DEVOFFSET (0) = DEVICE1_OFFSET;
+ ENVSIZE (0) = ENV1_SIZE;
+ /* Default values are: erase-size=env-size */
+ DEVESIZE (0) = ENVSIZE (0);
+ /* #sectors=env-size/erase-size (rounded up) */
+ ENVSECTORS (0) = (ENVSIZE(0) + DEVESIZE(0) - 1) / DEVESIZE(0);
+#ifdef DEVICE1_ESIZE
+ DEVESIZE (0) = DEVICE1_ESIZE;
+#endif
+#ifdef DEVICE1_ENVSECTORS
+ ENVSECTORS (0) = DEVICE1_ENVSECTORS;
+#endif
+
+#ifdef HAVE_REDUND
+ DEVNAME (1) = DEVICE2_NAME;
+ DEVOFFSET (1) = DEVICE2_OFFSET;
+ ENVSIZE (1) = ENV2_SIZE;
+ /* Default values are: erase-size=env-size */
+ DEVESIZE (1) = ENVSIZE (1);
+ /* #sectors=env-size/erase-size (rounded up) */
+ ENVSECTORS (1) = (ENVSIZE(1) + DEVESIZE(1) - 1) / DEVESIZE(1);
+#ifdef DEVICE2_ESIZE
+ DEVESIZE (1) = DEVICE2_ESIZE;
+#endif
+#ifdef DEVICE2_ENVSECTORS
+ ENVSECTORS (1) = DEVICE2_ENVSECTORS;
+#endif
+ HaveRedundEnv = 1;
+#endif
+#endif
+ if (stat (DEVNAME (0), &st)) {
+ fprintf (stderr,
+ "Cannot access MTD device %s: %s\n",
+ DEVNAME (0), strerror (errno));
+ return -1;
+ }
+
+ if (HaveRedundEnv && stat (DEVNAME (1), &st)) {
+ fprintf (stderr,
+ "Cannot access MTD device %s: %s\n",
+ DEVNAME (1), strerror (errno));
+ return -1;
+ }
+ return 0;
+}
+
+#if defined(CONFIG_FILE)
+static int get_config (char *fname)
+{
+ FILE *fp;
+ int i = 0;
+ int rc;
+ char dump[128];
+ char *devname;
+
+ fp = fopen (fname, "r");
+ if (fp == NULL)
+ return -1;
+
+ while (i < 2 && fgets (dump, sizeof (dump), fp)) {
+ /* Skip incomplete conversions and comment strings */
+ if (dump[0] == '#')
+ continue;
+
+ rc = sscanf (dump, "%ms %lx %lx %lx %lx",
+ &devname,
+ &DEVOFFSET (i),
+ &ENVSIZE (i),
+ &DEVESIZE (i),
+ &ENVSECTORS (i));
+
+ if (rc < 3)
+ continue;
+
+ DEVNAME(i) = devname;
+
+ if (rc < 4)
+ /* Assume the erase size is the same as the env-size */
+ DEVESIZE(i) = ENVSIZE(i);
+
+ if (rc < 5)
+ /* Assume enough env sectors to cover the environment */
+ ENVSECTORS (i) = (ENVSIZE(i) + DEVESIZE(i) - 1) / DEVESIZE(i);
+
+ i++;
+ }
+ fclose (fp);
+
+ HaveRedundEnv = i - 1;
+ if (!i) { /* No valid entries found */
+ errno = EINVAL;
+ return -1;
+ } else
+ return 0;
+}
+#endif
diff --git a/qemu/roms/u-boot/tools/env/fw_env.config b/qemu/roms/u-boot/tools/env/fw_env.config
new file mode 100644
index 000000000..c9b9f6a16
--- /dev/null
+++ b/qemu/roms/u-boot/tools/env/fw_env.config
@@ -0,0 +1,22 @@
+# Configuration file for fw_(printenv/setenv) utility.
+# Up to two entries are valid, in this case the redundant
+# environment sector is assumed present.
+# Notice, that the "Number of sectors" is not required on NOR and SPI-dataflash.
+# Futhermore, if the Flash sector size is ommitted, this value is assumed to
+# be the same as the Environment size, which is valid for NOR and SPI-dataflash
+
+# NOR example
+# MTD device name Device offset Env. size Flash sector size Number of sectors
+/dev/mtd1 0x0000 0x4000 0x4000
+/dev/mtd2 0x0000 0x4000 0x4000
+
+# MTD SPI-dataflash example
+# MTD device name Device offset Env. size Flash sector size Number of sectors
+#/dev/mtd5 0x4200 0x4200
+#/dev/mtd6 0x4200 0x4200
+
+# NAND example
+#/dev/mtd0 0x4000 0x4000 0x20000 2
+
+# Block device example
+#/dev/mmcblk0 0xc0000 0x20000
diff --git a/qemu/roms/u-boot/tools/env/fw_env.h b/qemu/roms/u-boot/tools/env/fw_env.h
new file mode 100644
index 000000000..aff471ba1
--- /dev/null
+++ b/qemu/roms/u-boot/tools/env/fw_env.h
@@ -0,0 +1,63 @@
+/*
+ * (C) Copyright 2002-2008
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/* Pull in the current config to define the default environment */
+#ifndef __ASSEMBLY__
+#define __ASSEMBLY__ /* get only #defines from config.h */
+#include <config.h>
+#undef __ASSEMBLY__
+#else
+#include <config.h>
+#endif
+
+/*
+ * To build the utility with the static configuration
+ * comment out the next line.
+ * See included "fw_env.config" sample file
+ * for notes on configuration.
+ */
+#define CONFIG_FILE "/etc/fw_env.config"
+
+#ifndef CONFIG_FILE
+#define HAVE_REDUND /* For systems with 2 env sectors */
+#define DEVICE1_NAME "/dev/mtd1"
+#define DEVICE2_NAME "/dev/mtd2"
+#define DEVICE1_OFFSET 0x0000
+#define ENV1_SIZE 0x4000
+#define DEVICE1_ESIZE 0x4000
+#define DEVICE1_ENVSECTORS 2
+#define DEVICE2_OFFSET 0x0000
+#define ENV2_SIZE 0x4000
+#define DEVICE2_ESIZE 0x4000
+#define DEVICE2_ENVSECTORS 2
+#endif
+
+#ifndef CONFIG_BAUDRATE
+#define CONFIG_BAUDRATE 115200
+#endif
+
+#ifndef CONFIG_BOOTDELAY
+#define CONFIG_BOOTDELAY 5 /* autoboot after 5 seconds */
+#endif
+
+#ifndef CONFIG_BOOTCOMMAND
+#define CONFIG_BOOTCOMMAND \
+ "bootp; " \
+ "setenv bootargs root=/dev/nfs nfsroot=${serverip}:${rootpath} " \
+ "ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}::off; " \
+ "bootm"
+#endif
+
+extern int fw_printenv(int argc, char *argv[]);
+extern char *fw_getenv (char *name);
+extern int fw_setenv (int argc, char *argv[]);
+extern int fw_parse_script(char *fname);
+extern int fw_env_open(void);
+extern int fw_env_write(char *name, char *value);
+extern int fw_env_close(void);
+
+extern unsigned long crc32 (unsigned long, const unsigned char *, unsigned);
diff --git a/qemu/roms/u-boot/tools/env/fw_env_main.c b/qemu/roms/u-boot/tools/env/fw_env_main.c
new file mode 100644
index 000000000..ce50d58b6
--- /dev/null
+++ b/qemu/roms/u-boot/tools/env/fw_env_main.c
@@ -0,0 +1,147 @@
+/*
+ * (C) Copyright 2000-2008
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/*
+ * Command line user interface to firmware (=U-Boot) environment.
+ *
+ * Implements:
+ * fw_printenv [ -a key ] [[ -n name ] | [ name ... ]]
+ * - prints the value of a single environment variable
+ * "name", the ``name=value'' pairs of one or more
+ * environment variables "name", or the whole
+ * environment if no names are specified.
+ * fw_setenv [ -a key ] name [ value ... ]
+ * - If a name without any values is given, the variable
+ * with this name is deleted from the environment;
+ * otherwise, all "value" arguments are concatenated,
+ * separated by single blank characters, and the
+ * resulting string is assigned to the environment
+ * variable "name"
+ *
+ * If '-a key' is specified, the env block is encrypted with AES 128 CBC.
+ * The 'key' argument is in the format of 32 hexadecimal numbers (16 bytes
+ * of AES key), eg. '-a aabbccddeeff00112233445566778899'.
+ */
+
+#include <fcntl.h>
+#include <getopt.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/file.h>
+#include <unistd.h>
+#include "fw_env.h"
+
+#define CMD_PRINTENV "fw_printenv"
+#define CMD_SETENV "fw_setenv"
+
+static struct option long_options[] = {
+ {"script", required_argument, NULL, 's'},
+ {"help", no_argument, NULL, 'h'},
+ {NULL, 0, NULL, 0}
+};
+
+void usage(void)
+{
+
+ fprintf(stderr, "fw_printenv/fw_setenv, "
+ "a command line interface to U-Boot environment\n\n"
+ "usage:\tfw_printenv [-a key] [-n] [variable name]\n"
+ "\tfw_setenv [-a key] [variable name] [variable value]\n"
+ "\tfw_setenv -s [ file ]\n"
+ "\tfw_setenv -s - < [ file ]\n\n"
+ "The file passed as argument contains only pairs "
+ "name / value\n"
+ "Example:\n"
+ "# Any line starting with # is treated as comment\n"
+ "\n"
+ "\t netdev eth0\n"
+ "\t kernel_addr 400000\n"
+ "\t var1\n"
+ "\t var2 The quick brown fox jumps over the "
+ "lazy dog\n"
+ "\n"
+ "A variable without value will be dropped. It is possible\n"
+ "to put any number of spaces between the fields, but any\n"
+ "space inside the value is treated as part of the value "
+ "itself.\n\n"
+ );
+}
+
+int main(int argc, char *argv[])
+{
+ char *p;
+ char *cmdname = *argv;
+ char *script_file = NULL;
+ int c;
+ const char *lockname = "/var/lock/" CMD_PRINTENV ".lock";
+ int lockfd = -1;
+ int retval = EXIT_SUCCESS;
+
+ lockfd = open(lockname, O_WRONLY | O_CREAT | O_TRUNC, 0666);
+ if (-1 == lockfd) {
+ fprintf(stderr, "Error opening lock file %s\n", lockname);
+ return EXIT_FAILURE;
+ }
+
+ if (-1 == flock(lockfd, LOCK_EX)) {
+ fprintf(stderr, "Error locking file %s\n", lockname);
+ close(lockfd);
+ return EXIT_FAILURE;
+ }
+
+ if ((p = strrchr (cmdname, '/')) != NULL) {
+ cmdname = p + 1;
+ }
+
+ while ((c = getopt_long (argc, argv, "a:ns:h",
+ long_options, NULL)) != EOF) {
+ switch (c) {
+ case 'a':
+ /* AES key, handled later */
+ break;
+ case 'n':
+ /* handled in fw_printenv */
+ break;
+ case 's':
+ script_file = optarg;
+ break;
+ case 'h':
+ usage();
+ goto exit;
+ default: /* '?' */
+ fprintf(stderr, "Try `%s --help' for more information."
+ "\n", cmdname);
+ retval = EXIT_FAILURE;
+ goto exit;
+ }
+ }
+
+ if (strcmp(cmdname, CMD_PRINTENV) == 0) {
+ if (fw_printenv(argc, argv) != 0)
+ retval = EXIT_FAILURE;
+ } else if (strcmp(cmdname, CMD_SETENV) == 0) {
+ if (!script_file) {
+ if (fw_setenv(argc, argv) != 0)
+ retval = EXIT_FAILURE;
+ } else {
+ if (fw_parse_script(script_file) != 0)
+ retval = EXIT_FAILURE;
+ }
+ } else {
+ fprintf(stderr,
+ "Identity crisis - may be called as `" CMD_PRINTENV
+ "' or as `" CMD_SETENV "' but not as `%s'\n",
+ cmdname);
+ retval = EXIT_FAILURE;
+ }
+
+exit:
+ flock(lockfd, LOCK_UN);
+ close(lockfd);
+ return retval;
+}
diff --git a/qemu/roms/u-boot/tools/env/linux_string.c b/qemu/roms/u-boot/tools/env/linux_string.c
new file mode 100644
index 000000000..6c01addad
--- /dev/null
+++ b/qemu/roms/u-boot/tools/env/linux_string.c
@@ -0,0 +1 @@
+#include "../../lib/linux_string.c"