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2e5167ccad
By now, the majority of architectures have working relocation support, so the few remaining architectures have become exceptions. To make this more obvious, we make working relocation now the default case, and flag the remaining cases with CONFIG_NEEDS_MANUAL_RELOC. Signed-off-by: Wolfgang Denk <wd@denx.de> Tested-by: Heiko Schocher <hs@denx.de> Tested-by: Reinhard Meyer <u-boot@emk-elektronik.de>
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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