mirror of
https://github.com/brain-hackers/u-boot-brain
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![Haavard Skinnemoen](/assets/img/avatar_default.png)
This is pretty incomplete...it doesn't handle reading the environment before relocation, it doesn't support redundant environment, and it doesn't support embedded environment. But apart from that, it does seem to work. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
298 lines
6.9 KiB
C
298 lines
6.9 KiB
C
/*
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* (C) Copyright 2000-2002
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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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* 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 <malloc.h>
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DECLARE_GLOBAL_DATA_PTR;
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#ifdef CONFIG_AMIGAONEG3SE
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extern void enable_nvram(void);
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extern void disable_nvram(void);
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#endif
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#undef DEBUG_ENV
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#ifdef DEBUG_ENV
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#define DEBUGF(fmt,args...) printf(fmt ,##args)
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#else
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#define DEBUGF(fmt,args...)
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#endif
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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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uchar (*env_get_char)(int) = env_get_char_init;
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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_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 CFG_AUTOLOAD
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"autoload=" CFG_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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#if defined(CFG_ENV_IS_IN_NAND) /* Environment is in Nand Flash */ \
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|| defined(CFG_ENV_IS_IN_SPI_FLASH)
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int default_environment_size = sizeof(default_environment);
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#endif
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void env_crc_update (void)
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{
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env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
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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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{
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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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}
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return (c);
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}
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#ifdef CONFIG_AMIGAONEG3SE
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uchar env_get_char_memory (int index)
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{
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uchar retval;
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enable_nvram();
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if (gd->env_valid) {
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retval = ( *((uchar *)(gd->env_addr + index)) );
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} else {
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retval = ( default_environment[index] );
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}
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disable_nvram();
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return retval;
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}
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#else
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uchar env_get_char_memory (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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}
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#endif
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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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}
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void env_relocate (void)
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{
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DEBUGF ("%s[%d] offset = 0x%lx\n", __FUNCTION__,__LINE__,
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gd->reloc_off);
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#ifdef CONFIG_AMIGAONEG3SE
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enable_nvram();
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#endif
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#ifdef ENV_IS_EMBEDDED
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/*
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* The environment buffer is embedded with the text segment,
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* just relocate the environment pointer
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*/
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env_ptr = (env_t *)((ulong)env_ptr + gd->reloc_off);
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DEBUGF ("%s[%d] embedded ENV at %p\n", __FUNCTION__,__LINE__,env_ptr);
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#else
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/*
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* We must allocate a buffer for the environment
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*/
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env_ptr = (env_t *)malloc (CFG_ENV_SIZE);
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DEBUGF ("%s[%d] malloced ENV at %p\n", __FUNCTION__,__LINE__,env_ptr);
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#endif
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/*
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* After relocation to RAM, we can always use the "memory" functions
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*/
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env_get_char = env_get_char_memory;
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if (gd->env_valid == 0) {
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#if defined(CONFIG_GTH) || defined(CFG_ENV_IS_NOWHERE) /* Environment not changable */
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puts ("Using default environment\n\n");
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#else
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puts ("*** Warning - bad CRC, using default environment\n\n");
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show_boot_progress (-60);
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#endif
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if (sizeof(default_environment) > ENV_SIZE)
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{
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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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memset (env_ptr, 0, sizeof(env_t));
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memcpy (env_ptr->data,
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default_environment,
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sizeof(default_environment));
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#ifdef CFG_REDUNDAND_ENVIRONMENT
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env_ptr->flags = 0xFF;
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#endif
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env_crc_update ();
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gd->env_valid = 1;
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}
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else {
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env_relocate_spec ();
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}
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gd->env_addr = (ulong)&(env_ptr->data);
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#ifdef CONFIG_AMIGAONEG3SE
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disable_nvram();
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#endif
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}
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#ifdef 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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