#include <env_internal.h>
#include <log.h>
#include <sort.h>
+#include <asm/global_data.h>
#include <linux/stddef.h>
#include <search.h>
#include <errno.h>
#include <malloc.h>
#include <u-boot/crc.h>
+#include <dm/ofnode.h>
+#include <net.h>
+#include <watchdog.h>
DECLARE_GLOBAL_DATA_PTR;
};
/*
+ * This env_set() function is defined in cmd/nvedit.c, since it calls
+ * _do_env_set(), whis is a static function in that file.
+ *
+ * int env_set(const char *varname, const char *varvalue);
+ */
+
+/**
+ * Set an environment variable to an integer value
+ *
+ * @param varname Environment variable to set
+ * @param value Value to set it to
+ * @return 0 if ok, 1 on error
+ */
+int env_set_ulong(const char *varname, ulong value)
+{
+ /* TODO: this should be unsigned */
+ char *str = simple_itoa(value);
+
+ return env_set(varname, str);
+}
+
+/**
+ * Set an environment variable to an value in hex
+ *
+ * @param varname Environment variable to set
+ * @param value Value to set it to
+ * @return 0 if ok, 1 on error
+ */
+int env_set_hex(const char *varname, ulong value)
+{
+ char str[17];
+
+ sprintf(str, "%lx", value);
+ return env_set(varname, str);
+}
+
+ulong env_get_hex(const char *varname, ulong default_val)
+{
+ const char *s;
+ ulong value;
+ char *endp;
+
+ s = env_get(varname);
+ if (s)
+ value = hextoul(s, &endp);
+ if (!s || endp == s)
+ return default_val;
+
+ return value;
+}
+
+int eth_env_get_enetaddr(const char *name, uint8_t *enetaddr)
+{
+ string_to_enetaddr(env_get(name), enetaddr);
+ return is_valid_ethaddr(enetaddr);
+}
+
+int eth_env_set_enetaddr(const char *name, const uint8_t *enetaddr)
+{
+ char buf[ARP_HLEN_ASCII + 1];
+
+ if (eth_env_get_enetaddr(name, (uint8_t *)buf))
+ return -EEXIST;
+
+ sprintf(buf, "%pM", enetaddr);
+
+ return env_set(name, buf);
+}
+
+/*
+ * Look up variable from environment,
+ * return address of storage for that variable,
+ * or NULL if not found
+ */
+char *env_get(const char *name)
+{
+ if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
+ struct env_entry e, *ep;
+
+ WATCHDOG_RESET();
+
+ e.key = name;
+ e.data = NULL;
+ hsearch_r(e, ENV_FIND, &ep, &env_htab, 0);
+
+ return ep ? ep->data : NULL;
+ }
+
+ /* restricted capabilities before import */
+ if (env_get_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) >= 0)
+ return (char *)(gd->env_buf);
+
+ return NULL;
+}
+
+/*
+ * Like env_get, but prints an error if envvar isn't defined in the
+ * environment. It always returns what env_get does, so it can be used in
+ * place of env_get without changing error handling otherwise.
+ */
+char *from_env(const char *envvar)
+{
+ char *ret;
+
+ ret = env_get(envvar);
+
+ if (!ret)
+ printf("missing environment variable: %s\n", envvar);
+
+ return ret;
+}
+
+static int env_get_from_linear(const char *env, const char *name, char *buf,
+ unsigned len)
+{
+ const char *p, *end;
+ size_t name_len;
+
+ if (name == NULL || *name == '\0')
+ return -1;
+
+ name_len = strlen(name);
+
+ for (p = env; *p != '\0'; p = end + 1) {
+ const char *value;
+ unsigned res;
+
+ for (end = p; *end != '\0'; ++end)
+ if (end - env >= CONFIG_ENV_SIZE)
+ return -1;
+
+ if (strncmp(name, p, name_len) || p[name_len] != '=')
+ continue;
+ value = &p[name_len + 1];
+
+ res = end - value;
+ memcpy(buf, value, min(len, res + 1));
+
+ if (len <= res) {
+ buf[len - 1] = '\0';
+ printf("env_buf [%u bytes] too small for value of \"%s\"\n",
+ len, name);
+ }
+
+ return res;
+ }
+
+ return -1;
+}
+
+/*
+ * Look up variable from environment for restricted C runtime env.
+ */
+int env_get_f(const char *name, char *buf, unsigned len)
+{
+ const char *env;
+
+ if (gd->env_valid == ENV_INVALID)
+ env = default_environment;
+ else
+ env = (const char *)gd->env_addr;
+
+ return env_get_from_linear(env, name, buf, len);
+}
+
+/**
+ * Decode the integer value of an environment variable and return it.
+ *
+ * @param name Name of environment variable
+ * @param base Number base to use (normally 10, or 16 for hex)
+ * @param default_val Default value to return if the variable is not
+ * found
+ * @return the decoded value, or default_val if not found
+ */
+ulong env_get_ulong(const char *name, int base, ulong default_val)
+{
+ /*
+ * We can use env_get() here, even before relocation, since the
+ * environment variable value is an integer and thus short.
+ */
+ const char *str = env_get(name);
+
+ return str ? simple_strtoul(str, NULL, base) : default_val;
+}
+
+/*
* Read an environment variable as a boolean
* Return -1 if variable does not exist (default to true)
*/
1 : 0;
}
+bool env_get_autostart(void)
+{
+ return env_get_yesno("autostart") == 1;
+}
+
/*
* Look up the variable from the default environment
*/
char *env_get_default(const char *name)
{
- char *ret_val;
- unsigned long really_valid = gd->env_valid;
- unsigned long real_gd_flags = gd->flags;
-
- /* Pretend that the image is bad. */
- gd->flags &= ~GD_FLG_ENV_READY;
- gd->env_valid = ENV_INVALID;
- ret_val = env_get(name);
- gd->env_valid = really_valid;
- gd->flags = real_gd_flags;
- return ret_val;
+ if (env_get_from_linear(default_environment, name,
+ (char *)(gd->env_buf),
+ sizeof(gd->env_buf)) >= 0)
+ return (char *)(gd->env_buf);
+
+ return NULL;
}
void env_set_default(const char *s, int flags)
{
- if (sizeof(default_environment) > ENV_SIZE) {
- puts("*** Error - default environment is too large\n\n");
- return;
- }
-
if (s) {
if ((flags & H_INTERACTIVE) == 0) {
printf("*** Warning - %s, "
}
flags |= H_DEFAULT;
- if (himport_r(&env_htab, (char *)default_environment,
+ if (himport_r(&env_htab, default_environment,
sizeof(default_environment), '\0', flags, 0,
- 0, NULL) == 0)
+ 0, NULL) == 0) {
pr_err("## Error: Environment import failed: errno = %d\n",
errno);
+ return;
+ }
gd->flags |= GD_FLG_ENV_READY;
gd->flags |= GD_FLG_ENV_DEFAULT;
* (and use \0 as a separator)
*/
flags |= H_NOCLEAR | H_DEFAULT;
- return himport_r(&env_htab, (const char *)default_environment,
+ return himport_r(&env_htab, default_environment,
sizeof(default_environment), '\0',
flags, 0, nvars, vars);
}
int env_check_redund(const char *buf1, int buf1_read_fail,
const char *buf2, int buf2_read_fail)
{
- int crc1_ok, crc2_ok;
+ int crc1_ok = 0, crc2_ok = 0;
env_t *tmp_env1, *tmp_env2;
tmp_env1 = (env_t *)buf1;
if (buf1_read_fail && buf2_read_fail) {
puts("*** Error - No Valid Environment Area found\n");
+ return -EIO;
} else if (buf1_read_fail || buf2_read_fail) {
puts("*** Warning - some problems detected ");
puts("reading environment; recovered successfully\n");
}
- if (buf1_read_fail && buf2_read_fail) {
- return -EIO;
- } else if (!buf1_read_fail && buf2_read_fail) {
- gd->env_valid = ENV_VALID;
- return -EINVAL;
- } else if (buf1_read_fail && !buf2_read_fail) {
- gd->env_valid = ENV_REDUND;
- return -ENOENT;
- }
-
- crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) ==
- tmp_env1->crc;
- crc2_ok = crc32(0, tmp_env2->data, ENV_SIZE) ==
- tmp_env2->crc;
+ if (!buf1_read_fail)
+ crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) ==
+ tmp_env1->crc;
+ if (!buf2_read_fail)
+ crc2_ok = crc32(0, tmp_env2->data, ENV_SIZE) ==
+ tmp_env2->crc;
if (!crc1_ok && !crc2_ok) {
return -ENOMSG; /* needed for env_load() */
if (ret == -EIO) {
env_set_default("bad env area", 0);
return -EIO;
- } else if (ret == -EINVAL) {
- return env_import((char *)buf1, 1, flags);
- } else if (ret == -ENOENT) {
- return env_import((char *)buf2, 1, flags);
} else if (ret == -ENOMSG) {
env_set_default("bad CRC", 0);
return -ENOMSG;
return found;
}
#endif
+
+#ifdef CONFIG_ENV_IMPORT_FDT
+void env_import_fdt(void)
+{
+ const char *path;
+ struct ofprop prop;
+ ofnode node;
+ int res;
+
+ path = env_get("env_fdt_path");
+ if (!path || !path[0])
+ return;
+
+ node = ofnode_path(path);
+ if (!ofnode_valid(node)) {
+ printf("Warning: device tree node '%s' not found\n", path);
+ return;
+ }
+
+ for (res = ofnode_get_first_property(node, &prop);
+ !res;
+ res = ofnode_get_next_property(&prop)) {
+ const char *name, *val;
+
+ val = ofnode_get_property_by_prop(&prop, &name, NULL);
+ env_set(name, val);
+ }
+}
+#endif
projects / platform / kernel / u-boot.git / blobdiff