环境：使用的sdk6.0的uboot
目的：在uboot中能够使用nandecc hw 0 命令
下面是我处理的思路： //不知道是否正确。
发现该命令在armv7/omap3/board.c里面,而我使用的armv7/am33xx/board.c 下面
因此直接复制代码
static int do_switch_ecc(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
if (argc < 2 || argc > 3)
goto usage;
if (strncmp(argv[1], "hw", 2) == 0) {
if (argc == 2) {
omap_nand_switch_ecc(1, 1);
} else {
if (strncmp(argv[2], "hamming", 7) == 0)
omap_nand_switch_ecc(1, 1);
else if (strncmp(argv[2], "bch8", 4) == 0)
omap_nand_switch_ecc(1, 8);
else
goto usage;
}
} else if (strncmp(argv[1], "sw", 2) == 0) {
omap_nand_switch_ecc(0, 0);
} else {
goto usage;
}
return 0;
usage:
printf ("Usage: nandecc %s\n", cmdtp->usage);
return 1;
}
U_BOOT_CMD(
nandecc, 3, 1, do_switch_ecc,
"switch OMAP3 NAND ECC calculation algorithm",
"hw [hamming|bch8] - Switch between NAND hardware 1-bit hamming and"
" 8-bit BCH\n"
" ecc calculation (second parameter may"
" be omitted).\n"
"nandecc sw - Switch to NAND software ecc algorithm."
);
编译出现告警：
/home/335X/mytq335x/drivers/mtd/nand/nand_base.c:516: undefined reference to `nand_isbad_bbt'
drivers/mtd/nand/libnand.o: In function `nand_erase_nand':
/home/335X/mytq335x/drivers/mtd/nand/nand_base.c:2410: undefined reference to `nand_update_bbt'
drivers/mtd/nand/libnand.o: In function `omap_nand_switch_ecc':
/home/335X/mytq335x/drivers/mtd/nand/omap_gpmc.c:837: undefined reference to `nand_curr_device'
/home/335X/mytq335x/drivers/mtd/nand/omap_gpmc.c:837: undefined reference to `nand_info'
make[1]: *** [/home/335X/mytq335x/spl/u-boot-spl] 错误 1
make[1]:正在离开目录 `/home/335X/mytq335x/spl'
make: *** [spl/u-boot-spl.bin] 错误 2
问题：为什么会出现上面的告警？？？
