嵌入式Linux开发环境的搭建之：U-Boot移植

（9）提供nandflash相关宏定义（include/configs/fs2410.h），具体参考源码。

（10）加入NandFlash设备（include/linux/mtd/nand_ids.h）

staticstructnand_flash_devnand_flash_ids[]=

{

......

{SamsungKM29N16000,NAND_MFR_SAMSUNG,0x64,21,1,2,0x1000,0},

{SamsungK9F1208U0M,NAND_MFR_SAMSUNG,0x76,26,0,3,0x4000,0},

{Samsungunknown4Mb,NAND_MFR_SAMSUNG,0x6b,22,0,2,0x2000,0},

......

{NULL,}

};

（11）设置NandFlash环境（common/env_nand.c）

intnand_legacy_rw(structnand_chip*nand,intcmd,

size_tstart,size_tlen,

size_t*retlen,u_char*buf);

externstructnand_chipnand_dev_desc[CFG_MAX_NAND_DEVICE];

externintnand_legacy_erase(structnand_chip*nand,

size_tofs,size_tlen,intclean);

/*infoforNANDchips,definedindrivers/nand/nand.c*/

externnand_info_tnand_info[CFG_MAX_NAND_DEVICE];

......

#else/*!CFG_ENV_OFFSET_REDUND*/

intsaveenv(void)

{

ulongtotal;

intret=0;

puts(ErasingNand...);

if(nand_legacy_erase(nand_dev_desc+0,

CFG_ENV_OFFSET,CFG_ENV_SIZE,0))

{

return1;

}

puts(WritingtoNand...);

total=CFG_ENV_SIZE;

ret=nand_legacy_rw(nand_dev_desc+0,0x00|0x02,CFG_ENV_OFFSET,

CFG_ENV_SIZE,total,(u_char*)env_ptr);

if(ret||total!=CFG_ENV_SIZE)

{

return1;

}

puts(donen);

returnret;

......

#else/*!CFG_ENV_OFFSET_REDUND*/

voidenv_relocate_spec(void)

{

#if!defined(ENV_IS_EMBEDDED)

ulongtotal;

intret;

total=CFG_ENV_SIZE;

ret=nand_legacy_rw(nand_dev_desc+0,0x01|0x02,CFG_ENV_OFFSET,

CFG_ENV_SIZE,total,(u_char*)env_ptr);