d1a7254529
The current NAND Bootloader setup forces the environment variables to be in line with the bootloader. This change enables the configuration to be made in the board include file instead so that it can be individually enabled. Signed-off-by: Nick Spence <nick.spence@freescale.com> Signed-off-by: Stefan Roese <sr@denx.de>
106 lines
3.4 KiB
C
106 lines
3.4 KiB
C
/*
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* (C) Copyright 2002
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* Wolfgang Denk, DENX Software Engineering, wd@denx.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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#ifndef _ENVIRONMENT_H_
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#define _ENVIRONMENT_H_ 1
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/**************************************************************************
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*
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* The "environment" is stored as a list of '\0' terminated
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* "name=value" strings. The end of the list is marked by a double
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* '\0'. New entries are always added at the end. Deleting an entry
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* shifts the remaining entries to the front. Replacing an entry is a
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* combination of deleting the old value and adding the new one.
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*
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* The environment is preceeded by a 32 bit CRC over the data part.
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*
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**************************************************************************
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*/
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#if defined(CFG_ENV_IS_IN_FLASH)
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# ifndef CFG_ENV_ADDR
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# define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
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# endif
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# ifndef CFG_ENV_OFFSET
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# define CFG_ENV_OFFSET (CFG_ENV_ADDR - CFG_FLASH_BASE)
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# endif
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# if !defined(CFG_ENV_ADDR_REDUND) && defined(CFG_ENV_OFFSET_REDUND)
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# define CFG_ENV_ADDR_REDUND (CFG_FLASH_BASE + CFG_ENV_OFFSET_REDUND)
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# endif
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# if defined(CFG_ENV_SECT_SIZE) || defined(CFG_ENV_SIZE)
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# ifndef CFG_ENV_SECT_SIZE
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# define CFG_ENV_SECT_SIZE CFG_ENV_SIZE
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# endif
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# ifndef CFG_ENV_SIZE
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# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
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# endif
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# else
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# error "Both CFG_ENV_SECT_SIZE and CFG_ENV_SIZE undefined"
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# endif
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# if defined(CFG_ENV_ADDR_REDUND) && !defined(CFG_ENV_SIZE_REDUND)
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# define CFG_ENV_SIZE_REDUND CFG_ENV_SIZE
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# endif
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# if (CFG_ENV_ADDR >= CFG_MONITOR_BASE) && \
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(CFG_ENV_ADDR+CFG_ENV_SIZE) <= (CFG_MONITOR_BASE + CFG_MONITOR_LEN)
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# define ENV_IS_EMBEDDED 1
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# endif
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# if defined(CFG_ENV_ADDR_REDUND) || defined(CFG_ENV_OFFSET_REDUND)
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# define CFG_REDUNDAND_ENVIRONMENT 1
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# endif
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#endif /* CFG_ENV_IS_IN_FLASH */
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#if defined(CFG_ENV_IS_IN_NAND)
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# ifndef CFG_ENV_OFFSET
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# error "Need to define CFG_ENV_OFFSET when using CFG_ENV_IS_IN_NAND"
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# endif
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# ifndef CFG_ENV_SIZE
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# error "Need to define CFG_ENV_SIZE when using CFG_ENV_IS_IN_NAND"
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# endif
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# ifdef CFG_ENV_OFFSET_REDUND
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# define CFG_REDUNDAND_ENVIRONMENT
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# endif
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# ifdef CFG_ENV_IS_EMBEDDED
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# define ENV_IS_EMBEDDED 1
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# endif
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#endif /* CFG_ENV_IS_IN_NAND */
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#ifdef CFG_REDUNDAND_ENVIRONMENT
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# define ENV_HEADER_SIZE (sizeof(unsigned long) + 1)
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#else
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# define ENV_HEADER_SIZE (sizeof(unsigned long))
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#endif
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#define ENV_SIZE (CFG_ENV_SIZE - ENV_HEADER_SIZE)
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typedef struct environment_s {
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unsigned long crc; /* CRC32 over data bytes */
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#ifdef CFG_REDUNDAND_ENVIRONMENT
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unsigned char flags; /* active/obsolete flags */
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#endif
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unsigned char data[ENV_SIZE]; /* Environment data */
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} env_t;
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#endif /* _ENVIRONMENT_H_ */
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