mirror of
https://github.com/AsahiLinux/u-boot
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75eb82ec7c
Mflash is fusion memory device mainly targeted consumer eletronic and mobile phone. Internally, it have nand flash and other hardware logics and supports some different operation (ATA, IO, XIP) modes. IO mode is custom mode for the host that doesn't have IDE interface. (Many mobile targeted SoC doesn't have IDE bus) This driver support mflash IO mode. Followings are brief descriptions about IO mode. 1. IO mode based on ATA protocol and uses some custom command. (read confirm, write confirm) 2. IO mode uses SRAM bus interface. Signed-off-by: unsik Kim <donari75@gmail.com>
135 lines
4.4 KiB
C
135 lines
4.4 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(CONFIG_ENV_IS_IN_FLASH)
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# ifndef CONFIG_ENV_ADDR
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# define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
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# endif
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# ifndef CONFIG_ENV_OFFSET
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# define CONFIG_ENV_OFFSET (CONFIG_ENV_ADDR - CONFIG_SYS_FLASH_BASE)
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# endif
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# if !defined(CONFIG_ENV_ADDR_REDUND) && defined(CONFIG_ENV_OFFSET_REDUND)
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# define CONFIG_ENV_ADDR_REDUND (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET_REDUND)
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# endif
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# if defined(CONFIG_ENV_SECT_SIZE) || defined(CONFIG_ENV_SIZE)
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# ifndef CONFIG_ENV_SECT_SIZE
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# define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE
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# endif
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# ifndef CONFIG_ENV_SIZE
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# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
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# endif
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# else
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# error "Both CONFIG_ENV_SECT_SIZE and CONFIG_ENV_SIZE undefined"
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# endif
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# if defined(CONFIG_ENV_ADDR_REDUND) && !defined(CONFIG_ENV_SIZE_REDUND)
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# define CONFIG_ENV_SIZE_REDUND CONFIG_ENV_SIZE
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# endif
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# if (CONFIG_ENV_ADDR >= CONFIG_SYS_MONITOR_BASE) && \
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(CONFIG_ENV_ADDR+CONFIG_ENV_SIZE) <= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN)
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# define ENV_IS_EMBEDDED 1
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# endif
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# if defined(CONFIG_ENV_ADDR_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
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# define CONFIG_SYS_REDUNDAND_ENVIRONMENT 1
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# endif
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#endif /* CONFIG_ENV_IS_IN_FLASH */
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#if defined(CONFIG_ENV_IS_IN_NAND)
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# ifndef CONFIG_ENV_OFFSET
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# error "Need to define CONFIG_ENV_OFFSET when using CONFIG_ENV_IS_IN_NAND"
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# endif
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# ifndef CONFIG_ENV_SIZE
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# error "Need to define CONFIG_ENV_SIZE when using CONFIG_ENV_IS_IN_NAND"
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# endif
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# ifdef CONFIG_ENV_OFFSET_REDUND
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# define CONFIG_SYS_REDUNDAND_ENVIRONMENT
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# endif
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# ifdef CONFIG_ENV_IS_EMBEDDED
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# define ENV_IS_EMBEDDED 1
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# endif
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#endif /* CONFIG_ENV_IS_IN_NAND */
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#if defined(CONFIG_ENV_IS_IN_MG_DISK)
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# ifndef CONFIG_ENV_ADDR
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# error "Need to define CONFIG_ENV_ADDR when using CONFIG_ENV_IS_IN_MG_DISK"
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# endif
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# ifndef CONFIG_ENV_SIZE
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# error "Need to define CONFIG_ENV_SIZE when using CONFIG_ENV_IS_IN_MG_DISK"
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# endif
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# ifdef CONFIG_ENV_IS_EMBEDDED
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# error "CONFIG_ENV_IS_EMBEDDED not supported when using CONFIG_ENV_IS_IN_MG_DISK"
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# endif
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#endif /* CONFIG_ENV_IS_IN_MG_DISK */
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#ifdef USE_HOSTCC
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# include <stdint.h>
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#else
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# include <linux/types.h>
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#endif
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#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
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# define ENV_HEADER_SIZE (sizeof(uint32_t) + 1)
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#else
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# define ENV_HEADER_SIZE (sizeof(uint32_t))
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#endif
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#define ENV_SIZE (CONFIG_ENV_SIZE - ENV_HEADER_SIZE)
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typedef struct environment_s {
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uint32_t crc; /* CRC32 over data bytes */
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#ifdef CONFIG_SYS_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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/* Function that returns a character from the environment */
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unsigned char env_get_char (int);
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/* Function that returns a pointer to a value from the environment */
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unsigned char *env_get_addr(int);
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unsigned char env_get_char_memory (int index);
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/* Function that updates CRC of the enironment */
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void env_crc_update (void);
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/* [re]set to the default environment */
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void set_default_env(void);
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#endif /* _ENVIRONMENT_H_ */
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