133 lines
3.5 KiB
C
133 lines
3.5 KiB
C
/*
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* (C) Copyright 2007-2013
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* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
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* Jerry Wang <wangflord@allwinnertech.com>
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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 <config.h>
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#include <common.h>
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#define SUNXI_SPRITE_USERDATA_ADDRESS (0x41000000)
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struct userdata_info
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{
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char *addr;
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uint length;
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};
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struct userdata_info userdata[16];
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/*
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************************************************************************************************************
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*
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* function
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*
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* name :
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*
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* parmeters :
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*
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* return :
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*
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* note :
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*
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*
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************************************************************************************************************
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*/
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int sunxi_sprite_erase_flash()
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{
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int need_erase_flash;
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char buf[1024 * 1024];
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char *tmp_buf;
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sunxi_mbr *local_mbr;
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int i;
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ret = script_parser_fetch("nand_para", "erase_flash", &need_erase_flash, 1);
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if((!ret) && (need_erase_flash))
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{
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//check if need to protect part data
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if(sprite_flash_init())
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{
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sprite_flash_erase();
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return 0;
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}
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if(sprite_flash_read(0, 1024 * 1024/512, buf) == 0)
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{
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printf("read local mbr fail\n");
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}
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tmp_buf = buf + 4;
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local_mbr = (sunxi_mbr *)(tmp_buf - 4);
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for(i=0;i<SUNXI_MBR_MAX_COUNT;i++)
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{
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if(crc32(0, tmp_buf, SUNXI_MBR_SIZE - 4) != local_mbr->crc32)
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{
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printf("bad mbr table\n");
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tmp_buf += SUNXI_MBR_SIZE;
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}
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else
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{
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sprite_store_part_data(local_mbr);
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break;
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}
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}
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sprite_flash_erase();
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if(i != SUNXI_MBR_MAX_COUNT) //this means there is no correct sunxi mbr copy, then consider the flash has no need to protect data
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{
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sprite_restore_part_data();
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}
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sprite_flash_exit();
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}
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return 0;
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}
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/*
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************************************************************************************************************
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*
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* function
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*
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* name :
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*
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* parmeters :
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*
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* return :
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*
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* note : 存储用户数据，包括所有的用户数据
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*
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*
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************************************************************************************************************
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*/
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int sprite_store_part_data(local_mbr);
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{
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int i, j;
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j = 0;
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memset(userdata, 0, 16 * sizoef(struct userdata_info));
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userdata[0].addr = (uint *)SUNXI_SPRITE_USERDATA_ADDRESS;
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for(i=0;i<mbr->PartCount;i++)
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{
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if(mbr->array[i].private == 1)
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{
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//表示此分区是用户数据，需要保护起来
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sunxi_flash_read(mbr->array[i].addlo, mbr->array[i].lenlo, userdata[j].addr);
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userdata[j + 1].addr = userdata[j].addr + userdata[j].length;
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userdata[j + 1].lenlo = mbr->array[i].lenlo;
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}
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}
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}
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