287 lines
6.4 KiB
C
287 lines
6.4 KiB
C
/*
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* (C) Copyright 2000-2010
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Andreas Heppel <aheppel@sysgo.de>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <command.h>
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#include <environment.h>
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#include <linux/stddef.h>
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#include <search.h>
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#include <errno.h>
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#include <malloc.h>
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DECLARE_GLOBAL_DATA_PTR;
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extern env_t *env_ptr;
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extern void env_relocate_spec (void);
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extern uchar env_get_char_spec(int);
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static uchar env_get_char_init (int index);
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/************************************************************************
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* Default settings to be used when no valid environment is found
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*/
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#define XMK_STR(x) #x
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#define MK_STR(x) XMK_STR(x)
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uchar default_environment[] = {
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#ifdef CONFIG_BOOTARGS
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"bootargs=" CONFIG_BOOTARGS "\0"
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#endif
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#ifdef CONFIG_BOOTCOMMAND
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"bootcmd=" CONFIG_BOOTCOMMAND "\0"
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#endif
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#ifdef CONFIG_RAMBOOTCOMMAND
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"ramboot=" CONFIG_RAMBOOTCOMMAND "\0"
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#endif
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#ifdef CONFIG_NFSBOOTCOMMAND
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"nfsboot=" CONFIG_NFSBOOTCOMMAND "\0"
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#endif
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#if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
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"bootdelay=" MK_STR(CONFIG_BOOTDELAY) "\0"
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#endif
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#if defined(CONFIG_BAUDRATE) && (CONFIG_BAUDRATE >= 0)
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"baudrate=" MK_STR(CONFIG_BAUDRATE) "\0"
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#endif
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#ifdef CONFIG_LOADS_ECHO
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"loads_echo=" MK_STR(CONFIG_LOADS_ECHO) "\0"
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#endif
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#ifdef CONFIG_ETHADDR
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"ethaddr=" MK_STR(CONFIG_ETHADDR) "\0"
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#endif
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#ifdef CONFIG_ETH1ADDR
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"eth1addr=" MK_STR(CONFIG_ETH1ADDR) "\0"
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#endif
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#ifdef CONFIG_ETH2ADDR
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"eth2addr=" MK_STR(CONFIG_ETH2ADDR) "\0"
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#endif
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#ifdef CONFIG_ETH3ADDR
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"eth3addr=" MK_STR(CONFIG_ETH3ADDR) "\0"
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#endif
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#ifdef CONFIG_ETH4ADDR
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"eth4addr=" MK_STR(CONFIG_ETH4ADDR) "\0"
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#endif
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#ifdef CONFIG_ETH5ADDR
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"eth5addr=" MK_STR(CONFIG_ETH5ADDR) "\0"
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#endif
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#ifdef CONFIG_IPADDR
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"ipaddr=" MK_STR(CONFIG_IPADDR) "\0"
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#endif
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#ifdef CONFIG_SERVERIP
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"serverip=" MK_STR(CONFIG_SERVERIP) "\0"
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#endif
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#ifdef CONFIG_SYS_AUTOLOAD
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"autoload=" CONFIG_SYS_AUTOLOAD "\0"
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#endif
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#ifdef CONFIG_PREBOOT
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"preboot=" CONFIG_PREBOOT "\0"
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#endif
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#ifdef CONFIG_ROOTPATH
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"rootpath=" MK_STR(CONFIG_ROOTPATH) "\0"
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#endif
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#ifdef CONFIG_GATEWAYIP
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"gatewayip=" MK_STR(CONFIG_GATEWAYIP) "\0"
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#endif
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#ifdef CONFIG_NETMASK
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"netmask=" MK_STR(CONFIG_NETMASK) "\0"
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#endif
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#ifdef CONFIG_HOSTNAME
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"hostname=" MK_STR(CONFIG_HOSTNAME) "\0"
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#endif
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#ifdef CONFIG_BOOTFILE
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"bootfile=" MK_STR(CONFIG_BOOTFILE) "\0"
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#endif
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#ifdef CONFIG_LOADADDR
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"loadaddr=" MK_STR(CONFIG_LOADADDR) "\0"
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#endif
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#ifdef CONFIG_CLOCKS_IN_MHZ
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"clocks_in_mhz=1\0"
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#endif
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#if defined(CONFIG_PCI_BOOTDELAY) && (CONFIG_PCI_BOOTDELAY > 0)
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"pcidelay=" MK_STR(CONFIG_PCI_BOOTDELAY) "\0"
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#endif
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#ifdef CONFIG_EXTRA_ENV_SETTINGS
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CONFIG_EXTRA_ENV_SETTINGS
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#endif
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"\0"
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};
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static uchar env_get_char_init (int index)
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{
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uchar c;
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/* if crc was bad, use the default environment */
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if (gd->env_valid)
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c = env_get_char_spec(index);
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else
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c = default_environment[index];
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return (c);
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}
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uchar env_get_char_memory (int index)
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{
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return *env_get_addr(index);
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}
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uchar env_get_char (int index)
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{
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uchar c;
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/* if relocated to RAM */
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if (gd->flags & GD_FLG_RELOC)
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c = env_get_char_memory(index);
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else
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c = env_get_char_init(index);
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return (c);
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}
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uchar *env_get_addr (int index)
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{
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if (gd->env_valid)
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return (uchar *)(gd->env_addr + index);
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else
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return &default_environment[index];
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}
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void set_default_env(const char *s)
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{
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if (sizeof(default_environment) > ENV_SIZE) {
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puts("*** Error - default environment is too large\n\n");
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return;
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}
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if (s) {
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if (*s == '!') {
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printf("*** Warning - %s, "
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"using default environment\n\n",
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s+1);
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} else {
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puts(s);
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}
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} else {
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puts("Using default environment\n\n");
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}
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if (himport((char *)default_environment,
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sizeof(default_environment), '\0', 0) == 0) {
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error("Environment import failed: errno = %d\n", errno);
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}
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gd->flags |= GD_FLG_ENV_READY;
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}
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/*
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* Check if CRC is valid and (if yes) import the environment.
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* Note that "buf" may or may not be aligned.
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*/
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int env_import(const char *buf, int check)
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{
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env_t *ep = (env_t *)buf;
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if (check) {
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uint32_t crc;
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memcpy(&crc, &ep->crc, sizeof(crc));
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if (crc32(0, ep->data, ENV_SIZE) != crc) {
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set_default_env("!bad CRC");
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return 0;
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}
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}
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if (himport((char *)ep->data, ENV_SIZE, '\0', 0)) {
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gd->flags |= GD_FLG_ENV_READY;
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return 1;
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}
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error("Cannot import environment: errno = %d\n", errno);
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set_default_env("!import failed");
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return 0;
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}
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void env_relocate (void)
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{
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#if defined(CONFIG_NEEDS_MANUAL_RELOC)
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extern void env_reloc(void);
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env_reloc();
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#endif
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if (gd->env_valid == 0) {
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#if defined(CONFIG_ENV_IS_NOWHERE) /* Environment not changable */
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set_default_env(NULL);
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#else
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show_boot_progress (-60);
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set_default_env("!bad CRC");
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#endif
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} else {
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env_relocate_spec ();
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}
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}
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#if 0 /* need to reimplement - def CONFIG_AUTO_COMPLETE */
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int env_complete(char *var, int maxv, char *cmdv[], int bufsz, char *buf)
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{
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int i, nxt, len, vallen, found;
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const char *lval, *rval;
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found = 0;
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cmdv[0] = NULL;
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len = strlen(var);
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/* now iterate over the variables and select those that match */
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for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
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for (nxt=i; env_get_char(nxt) != '\0'; ++nxt)
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;
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lval = (char *)env_get_addr(i);
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rval = strchr(lval, '=');
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if (rval != NULL) {
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vallen = rval - lval;
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rval++;
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} else
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vallen = strlen(lval);
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if (len > 0 && (vallen < len || memcmp(lval, var, len) != 0))
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continue;
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if (found >= maxv - 2 || bufsz < vallen + 1) {
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cmdv[found++] = "...";
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break;
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}
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cmdv[found++] = buf;
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memcpy(buf, lval, vallen); buf += vallen; bufsz -= vallen;
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*buf++ = '\0'; bufsz--;
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}
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cmdv[found] = NULL;
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return found;
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}
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#endif
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