* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Andreas Heppel <aheppel@sysgo.de>
*
- * 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
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
DECLARE_GLOBAL_DATA_PTR;
-extern env_t *env_ptr;
-
-extern void env_relocate_spec (void);
-extern uchar env_get_char_spec(int);
-
-static uchar env_get_char_init (int index);
-
/************************************************************************
* Default settings to be used when no valid environment is found
*/
-#define XMK_STR(x) #x
-#define MK_STR(x) XMK_STR(x)
+#include <env_default.h>
-uchar default_environment[] = {
-#ifdef CONFIG_BOOTARGS
- "bootargs=" CONFIG_BOOTARGS "\0"
-#endif
-#ifdef CONFIG_BOOTCOMMAND
- "bootcmd=" CONFIG_BOOTCOMMAND "\0"
-#endif
-#ifdef CONFIG_RAMBOOTCOMMAND
- "ramboot=" CONFIG_RAMBOOTCOMMAND "\0"
-#endif
-#ifdef CONFIG_NFSBOOTCOMMAND
- "nfsboot=" CONFIG_NFSBOOTCOMMAND "\0"
-#endif
-#if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
- "bootdelay=" MK_STR(CONFIG_BOOTDELAY) "\0"
-#endif
-#if defined(CONFIG_BAUDRATE) && (CONFIG_BAUDRATE >= 0)
- "baudrate=" MK_STR(CONFIG_BAUDRATE) "\0"
-#endif
-#ifdef CONFIG_LOADS_ECHO
- "loads_echo=" MK_STR(CONFIG_LOADS_ECHO) "\0"
-#endif
-#ifdef CONFIG_ETHADDR
- "ethaddr=" MK_STR(CONFIG_ETHADDR) "\0"
-#endif
-#ifdef CONFIG_ETH1ADDR
- "eth1addr=" MK_STR(CONFIG_ETH1ADDR) "\0"
-#endif
-#ifdef CONFIG_ETH2ADDR
- "eth2addr=" MK_STR(CONFIG_ETH2ADDR) "\0"
-#endif
-#ifdef CONFIG_ETH3ADDR
- "eth3addr=" MK_STR(CONFIG_ETH3ADDR) "\0"
-#endif
-#ifdef CONFIG_ETH4ADDR
- "eth4addr=" MK_STR(CONFIG_ETH4ADDR) "\0"
-#endif
-#ifdef CONFIG_ETH5ADDR
- "eth5addr=" MK_STR(CONFIG_ETH5ADDR) "\0"
-#endif
-#ifdef CONFIG_IPADDR
- "ipaddr=" MK_STR(CONFIG_IPADDR) "\0"
-#endif
-#ifdef CONFIG_SERVERIP
- "serverip=" MK_STR(CONFIG_SERVERIP) "\0"
-#endif
-#ifdef CONFIG_SYS_AUTOLOAD
- "autoload=" CONFIG_SYS_AUTOLOAD "\0"
-#endif
-#ifdef CONFIG_PREBOOT
- "preboot=" CONFIG_PREBOOT "\0"
-#endif
-#ifdef CONFIG_ROOTPATH
- "rootpath=" MK_STR(CONFIG_ROOTPATH) "\0"
-#endif
-#ifdef CONFIG_GATEWAYIP
- "gatewayip=" MK_STR(CONFIG_GATEWAYIP) "\0"
-#endif
-#ifdef CONFIG_NETMASK
- "netmask=" MK_STR(CONFIG_NETMASK) "\0"
-#endif
-#ifdef CONFIG_HOSTNAME
- "hostname=" MK_STR(CONFIG_HOSTNAME) "\0"
-#endif
-#ifdef CONFIG_BOOTFILE
- "bootfile=" MK_STR(CONFIG_BOOTFILE) "\0"
-#endif
-#ifdef CONFIG_LOADADDR
- "loadaddr=" MK_STR(CONFIG_LOADADDR) "\0"
-#endif
-#ifdef CONFIG_CLOCKS_IN_MHZ
- "clocks_in_mhz=1\0"
-#endif
-#if defined(CONFIG_PCI_BOOTDELAY) && (CONFIG_PCI_BOOTDELAY > 0)
- "pcidelay=" MK_STR(CONFIG_PCI_BOOTDELAY) "\0"
-#endif
-#ifdef CONFIG_EXTRA_ENV_SETTINGS
- CONFIG_EXTRA_ENV_SETTINGS
-#endif
- "\0"
+struct hsearch_data env_htab = {
+ .change_ok = env_flags_validate,
};
-static uchar env_get_char_init (int index)
+__weak uchar env_get_char_spec(int index)
{
- uchar c;
+ return *((uchar *)(gd->env_addr + index));
+}
+static uchar env_get_char_init(int index)
+{
/* if crc was bad, use the default environment */
if (gd->env_valid)
- c = env_get_char_spec(index);
+ return env_get_char_spec(index);
else
- c = default_environment[index];
-
- return (c);
+ return default_environment[index];
}
-uchar env_get_char_memory (int index)
+uchar env_get_char_memory(int index)
{
return *env_get_addr(index);
}
-uchar env_get_char (int index)
+uchar env_get_char(int index)
{
- uchar c;
-
/* if relocated to RAM */
if (gd->flags & GD_FLG_RELOC)
- c = env_get_char_memory(index);
+ return env_get_char_memory(index);
else
- c = env_get_char_init(index);
-
- return (c);
+ return env_get_char_init(index);
}
-uchar *env_get_addr (int index)
+const uchar *env_get_addr(int index)
{
if (gd->env_valid)
return (uchar *)(gd->env_addr + index);
return &default_environment[index];
}
+/*
+ * Read an environment variable as a boolean
+ * Return -1 if variable does not exist (default to true)
+ */
+int getenv_yesno(const char *var)
+{
+ char *s = getenv(var);
+
+ if (s == NULL)
+ return -1;
+ return (*s == '1' || *s == 'y' || *s == 'Y' || *s == 't' || *s == 'T') ?
+ 1 : 0;
+}
+
+/*
+ * Look up the variable from the default environment
+ */
+char *getenv_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 = 0;
+ ret_val = getenv(name);
+ gd->env_valid = really_valid;
+ gd->flags = real_gd_flags;
+ return ret_val;
+}
+
void set_default_env(const char *s)
{
+ int flags = 0;
+
if (sizeof(default_environment) > ENV_SIZE) {
puts("*** Error - default environment is too large\n\n");
return;
if (*s == '!') {
printf("*** Warning - %s, "
"using default environment\n\n",
- s+1);
+ s + 1);
} else {
+ flags = H_INTERACTIVE;
puts(s);
}
} else {
puts("Using default environment\n\n");
}
- if (himport((char *)default_environment,
- sizeof(default_environment), '\0', 0) == 0) {
+ if (himport_r(&env_htab, (char *)default_environment,
+ sizeof(default_environment), '\0', flags, 0,
+ 0, NULL) == 0)
error("Environment import failed: errno = %d\n", errno);
- }
+
gd->flags |= GD_FLG_ENV_READY;
}
+
+/* [re]set individual variables to their value in the default environment */
+int set_default_vars(int nvars, char * const vars[])
+{
+ /*
+ * Special use-case: import from default environment
+ * (and use \0 as a separator)
+ */
+ return himport_r(&env_htab, (const char *)default_environment,
+ sizeof(default_environment), '\0',
+ H_NOCLEAR | H_INTERACTIVE, 0, nvars, vars);
+}
+
+#ifdef CONFIG_ENV_AES
+#include <aes.h>
+/**
+ * env_aes_cbc_get_key() - Get AES-128-CBC key for the environment
+ *
+ * This function shall return 16-byte array containing AES-128 key used
+ * to encrypt and decrypt the environment. This function must be overriden
+ * by the implementer as otherwise the environment encryption will not
+ * work.
+ */
+__weak uint8_t *env_aes_cbc_get_key(void)
+{
+ return NULL;
+}
+
+static int env_aes_cbc_crypt(env_t *env, const int enc)
+{
+ unsigned char *data = env->data;
+ uint8_t *key;
+ uint8_t key_exp[AES_EXPAND_KEY_LENGTH];
+ uint32_t aes_blocks;
+
+ key = env_aes_cbc_get_key();
+ if (!key)
+ return -EINVAL;
+
+ /* First we expand the key. */
+ aes_expand_key(key, key_exp);
+
+ /* Calculate the number of AES blocks to encrypt. */
+ aes_blocks = ENV_SIZE / 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;
+}
+#else
+static inline int env_aes_cbc_crypt(env_t *env, const int enc)
+{
+ return 0;
+}
+#endif
+
/*
* Check if CRC is valid and (if yes) import the environment.
* Note that "buf" may or may not be aligned.
int env_import(const char *buf, int check)
{
env_t *ep = (env_t *)buf;
+ int ret;
if (check) {
uint32_t crc;
}
}
- if (himport((char *)ep->data, ENV_SIZE, '\0', 0)) {
+ /* Decrypt the env if desired. */
+ ret = env_aes_cbc_crypt(ep, 0);
+ if (ret) {
+ error("Failed to decrypt env!\n");
+ set_default_env("!import failed");
+ return ret;
+ }
+
+ if (himport_r(&env_htab, (char *)ep->data, ENV_SIZE, '\0', 0, 0,
+ 0, NULL)) {
gd->flags |= GD_FLG_ENV_READY;
return 1;
}
return 0;
}
-void env_relocate (void)
+/* Emport the environment and generate CRC for it. */
+int env_export(env_t *env_out)
{
-#if defined(CONFIG_NEEDS_MANUAL_RELOC)
- extern void env_reloc(void);
+ char *res;
+ ssize_t len;
+ int ret;
+
+ res = (char *)env_out->data;
+ len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
+ if (len < 0) {
+ error("Cannot export environment: errno = %d\n", errno);
+ return 1;
+ }
+ /* Encrypt the env if desired. */
+ ret = env_aes_cbc_crypt(env_out, 1);
+ if (ret)
+ return ret;
+
+ env_out->crc = crc32(0, env_out->data, ENV_SIZE);
+
+ return 0;
+}
+
+void env_relocate(void)
+{
+#if defined(CONFIG_NEEDS_MANUAL_RELOC)
env_reloc();
+ env_htab.change_ok += gd->reloc_off;
#endif
if (gd->env_valid == 0) {
-#if defined(CONFIG_ENV_IS_NOWHERE) /* Environment not changable */
+#if defined(CONFIG_ENV_IS_NOWHERE) || defined(CONFIG_SPL_BUILD)
+ /* Environment not changable */
set_default_env(NULL);
#else
- show_boot_progress (-60);
+ bootstage_error(BOOTSTAGE_ID_NET_CHECKSUM);
set_default_env("!bad CRC");
#endif
} else {
- env_relocate_spec ();
+ env_relocate_spec();
}
}
-#if 0 /* need to reimplement - def CONFIG_AUTO_COMPLETE */
+#if defined(CONFIG_AUTO_COMPLETE) && !defined(CONFIG_SPL_BUILD)
int env_complete(char *var, int maxv, char *cmdv[], int bufsz, char *buf)
{
- int i, nxt, len, vallen, found;
- const char *lval, *rval;
+ ENTRY *match;
+ int found, idx;
+ idx = 0;
found = 0;
cmdv[0] = NULL;
- len = strlen(var);
- /* now iterate over the variables and select those that match */
- for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
-
- for (nxt=i; env_get_char(nxt) != '\0'; ++nxt)
- ;
-
- lval = (char *)env_get_addr(i);
- rval = strchr(lval, '=');
- if (rval != NULL) {
- vallen = rval - lval;
- rval++;
- } else
- vallen = strlen(lval);
+ while ((idx = hmatch_r(var, idx, &match, &env_htab))) {
+ int vallen = strlen(match->key) + 1;
- if (len > 0 && (vallen < len || memcmp(lval, var, len) != 0))
- continue;
-
- if (found >= maxv - 2 || bufsz < vallen + 1) {
- cmdv[found++] = "...";
+ if (found >= maxv - 2 || bufsz < vallen)
break;
- }
+
cmdv[found++] = buf;
- memcpy(buf, lval, vallen); buf += vallen; bufsz -= vallen;
- *buf++ = '\0'; bufsz--;
+ memcpy(buf, match->key, vallen);
+ buf += vallen;
+ bufsz -= vallen;
}
+ qsort(cmdv, found, sizeof(cmdv[0]), strcmp_compar);
+
+ if (idx)
+ cmdv[found++] = "...";
+
cmdv[found] = NULL;
return found;
}
projects / karo-tx-uboot.git / blobdiff