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/*
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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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|
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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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#if defined(CFG_ENV_IS_IN_EEPROM) /* Environment is in EEPROM */ |
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#include <command.h> |
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#include <environment.h> |
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#include <cmd_nvedit.h> |
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#include <linux/stddef.h> |
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#include <malloc.h> |
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env_t *env_ptr = NULL; |
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char * env_name_spec = "EEPROM"; |
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extern uchar (*env_get_char)(int); |
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extern uchar env_get_char_memory (int index); |
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uchar env_get_char_spec (int index) |
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{ |
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uchar c; |
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eeprom_read (CFG_DEF_EEPROM_ADDR, |
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CFG_ENV_OFFSET+index+offsetof(env_t,data), |
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&c, 1); |
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return (c); |
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} |
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void env_relocate_spec (void) |
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{ |
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eeprom_read (CFG_DEF_EEPROM_ADDR, |
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CFG_ENV_OFFSET, |
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(uchar*)env_ptr, |
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CFG_ENV_SIZE); |
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} |
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int saveenv(void) |
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{ |
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return eeprom_write (CFG_DEF_EEPROM_ADDR, |
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CFG_ENV_OFFSET, |
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(uchar *)env_ptr, |
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CFG_ENV_SIZE); |
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} |
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/************************************************************************
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* Initialize Environment use |
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* |
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* We are still running from ROM, so data use is limited |
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* Use a (moderately small) buffer on the stack |
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*/ |
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int env_init(void) |
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{ |
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DECLARE_GLOBAL_DATA_PTR; |
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ulong crc, len, new; |
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unsigned off; |
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uchar buf[64]; |
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eeprom_init (); /* prepare for EEPROM read/write */ |
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/* read old CRC */ |
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eeprom_read (CFG_DEF_EEPROM_ADDR, |
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CFG_ENV_OFFSET+offsetof(env_t,crc), |
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(uchar *)&crc, sizeof(ulong)); |
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new = 0; |
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len = ENV_SIZE; |
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off = offsetof(env_t,data); |
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while (len > 0) { |
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int n = (len > sizeof(buf)) ? sizeof(buf) : len; |
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eeprom_read (CFG_DEF_EEPROM_ADDR, CFG_ENV_OFFSET+off, buf, n); |
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new = crc32 (new, buf, n); |
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len -= n; |
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off += n; |
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} |
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if (crc == new) { |
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gd->env_addr = offsetof(env_t,data); |
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gd->env_valid = 1; |
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} else { |
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gd->env_addr = 0; |
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gd->env_valid = 0; |
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} |
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return (0); |
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} |
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#endif /* CFG_ENV_IS_IN_EEPROM */ |
@ -0,0 +1,68 @@ |
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/*
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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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|
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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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#if defined(CFG_ENV_IS_NOWHERE) /* Environment is nowhere */ |
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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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env_t *env_ptr = NULL; |
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extern uchar default_environment[]; |
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extern int default_environment_size; |
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void env_relocate_spec (void) |
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{ |
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} |
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uchar env_get_char_spec (int index) |
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{ |
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DECLARE_GLOBAL_DATA_PTR; |
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return ( *((uchar *)(gd->env_addr + index)) ); |
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} |
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/************************************************************************
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* Initialize Environment use |
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* |
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* We are still running from ROM, so data use is limited |
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*/ |
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int env_init(void) |
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{ |
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DECLARE_GLOBAL_DATA_PTR; |
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gd->env_addr = (ulong)&default_environment[0]; |
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gd->env_valid = 0; |
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return (0); |
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} |
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#endif /* CFG_ENV_IS_NOWHERE) */ |
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