[U-Boot-Users] Problem About Nand Flash

Hi all, Can any one tell me what's meaning of the variables in the struct nand_flash_dev mean at /..../u-boot/include/linux/mtd/Nand.h.

struct nand_flash_dev{ char *name; int manufacture_id; int model_id; int chipshift; int pagesize; char pageadrlen; //this one unsigned long erasesize; char columnadrlen; //this one char large_blocks; //and this one int bus16;};

Thank you.

ShiZeQin