arm9uboot移植.docx

1、arm9uboot移植Uboot移植目录目录 I1. uboot移植 11.1. 4.3.2版本交叉编译工具 11.2. 加入atmel芯片支持 11.3. 增加对大页nandflash支持 21.4. 修改ether.c增加网络支持 71.5. 修改启动命令和网络参数设置 71.6. 加快断开网络时系统启动速度 81.7. 编译uboot 81. uboot移植EP63平台uboot1.2.0挂载用户文件系统yaffs2时存在bug，挂载的镜像内容为空，只能采用从ramdisk文件系统中复制用户文件的方式。该bug的主要原因是移植uboot1.2.0增加对nandflash读写时不支持大页n

2、andflash。而uboot1.2.0对大页nandflash支持的资料比较少，鉴于此移植uboot1.3.4，增加对大页nandflash的正确读写。支持更多的命令，如支持nandcrube、上下键盘命令等。1.1. 4.3.2版本交叉编译工具uboot1.2.0选用3.4.1版本的arm-linux-gcc编译，uboot1.3.4选用4.3.2版本的编译。否则编译通不过。修改/etc/bashrc,注释掉3.4.1版本的交叉编译器，增加4.3.2版本的交叉器。下载arm-linux-gcc-4.3.2.tgz然后在根目录下解压。解压后把4.3.2的交叉编译路径加入环境变量如下：PATH

3、=$PATH:/usr/local/arm/4.3.2/bin#PATH=$PATH:/usr/local/arm/3.4.1/bin使刚才的修改生效source /etc/bashrc。这样修改后就不需要重启系统，4.3.2版本的交叉编译工具就可以生效。1.2. 加入atmel芯片支持下载uboot源码和补丁：rootemboard:/xiaoyj/uboot# lsu-boot-1.3.4-exp.3.diff u-boot-1.3.4.tar.bz解压打入atmel芯片补丁rootemboard:/xiaoyj/uboot# tar -xjvf u-boot-1.3.4.tar.bz2r

4、ootemboard:/xiaoyj/uboot# lsu-boot-1.3.4 u-boot-1.3.4-exp.3.diff u-boot-1.3.4.tar.bz2进入u-boot-1.3.4目录:将补丁复制到u-boot-1.3.4目录里:rootemboard:/xiaoyj/uboot/ u-boot-1.3.4# cp ./u-boot-1.3.4-exp.3.diff打入atmel的补丁并清除以前的配置选项:rootemboard:/xiaoyj/uboot/ u-boot-1.3.4# cat u-boot-1.3.4-exp.3.diff | patch -p1rootem

5、board:/xiaoyj/uboot/ u-boot-1.3.4# make distclean 采用从nandflash启动，增加nandflash配置选项：rootemboard:/xiaoyj/uboot/ u-boot-1.3.4# make at91sam9260ek_nandflash_config . with environment variable in NAND FLASHConfiguring for at91sam9260ek board.1.3. 增加对大页nandflash支持修改u-boot-1.3.4/commn/cmd_nand.c在第12行，#includ

6、e 之后增加读写yaffs配置 #include #ifndef CFG_NAND_WRITE_YAFFS / added begin#define CFG_NAND_WRITE_YAFFS#endif /added end然后增加yaffs2文件系统读写支持，关键是了解yaffs2中64bytes OOB区中的数据组织结构：1) OOB最前端的2bytes为0xFF 0xFF，用于标识为非坏块。2) 每256bytes的数据需要3bytes的ECC校验，因此2K的数据需要24bytes的ECC校验。修改如下：在else printf(offset 0x%lx, size 0x%xn, *of

7、f, *size); return 0;之后，第159行增加如下代码：#ifdef CFG_NAND_WRITE_YAFFS / xiaoyj added begin/* * Write a yaffs filesystem image to NAND. * * If yaffs flag is 1, then the image is assumed to have been * generated by yaffs2/utils/mkyaffsimage.c, and only * 512B block + 16B OOB NAND is supported using the YAFFS

8、1 OOB layout. * * Otherwise, the image is assumed to have been generated by * yaffs2/utils/mkyaffs2image.c with Sergey Kubushyns patch applied * and supports larger 2KB block + 64B OOB NAND. * * Only MTD generated ECC is supported. * * Loosely based on mtd/util/nandwrite.c. */static struct nand_oobi

9、nfo yaffs1_oobinfo = .useecc = MTD_NANDECC_AUTOPLACE, .eccbytes = 6, .eccpos = 0, 1, 2, 3, 6, 7, .oobfree = 8, 8 ,;static struct nand_oobinfo yaffs2_oobinfo = .useecc = MTD_NANDECC_AUTOPLACE, .eccbytes = 24, .eccpos = 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60

10、, 61, 62, 63, .oobfree = 2, 38 ;static unsigned char ffchars = 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 16 */ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 32 */ 0xff, 0xff, 0xff, 0xff, 0xf

11、f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 48 */ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 64 */;static int nand_write_yaffs(nand_info_t *nand, ulong off, size_t *size, u_char *image, int yaffs) int imglen, pagelen

12、; u_char *imgptr, *oobptr; int ret; size_t retlen; int i; struct nand_oobinfo old_oobinfo; imglen = *size; imgptr = image; *size = 0; /* Make sure device page sizes are valid */ if (yaffs = 1 & !(nand-oobsize = 16 & nand-oobblock = 512) | (yaffs = 2 & !(nand-oobsize = 64 & nand-oobblock = 2048) prin

13、tf(Unsupported flash layoutn); return 1; /* update oobinfo for yaffs */ old_oobinfo = nand-oobinfo; nand-oobinfo = yaffs = 1 ? yaffs1_oobinfo : yaffs2_oobinfo; /* Check, if image is pagealigned */ pagelen = nand-oobblock + nand-oobsize; if (off % nand-erasesize) != 0 | (imglen % pagelen) != 0) print

14、f (Input image is not page alignedn); goto closeall; /* Check, if length fits into device */ if ( (imglen / pagelen) * nand-oobblock) (nand-size - off) printf (Input image does not fit into device); goto closeall; /* Get data from input and write to the device */ while (imglen 0 & (off size) /* if s

15、tart of eraseblock, check for bad block */ if (off % nand-erasesize = 0 & (nand-block_isbad)(nand, off) printf (Bad block at 0x%08lx, will be skippedn, off); off += nand-erasesize; continue; oobptr = imgptr + nand-oobblock; /* Write OOB data first, as ecc will be placed in there */ memset(ffchars, 0

16、xff, nand-oobsize); if(1 = yaffs) ffchars15 = oobptr12; ffchars14 = oobptr11; ffchars13 = oobptr7 & 0x3f; ffchars13|= (oobptr4 = 0 ? 0 : 0x40); ffchars13|= (oobptr5 = Y ? 0 : 0x80); ffchars12 = oobptr6; ffchars11 = oobptr3; ffchars10 = oobptr2; ffchars9 = oobptr1; ffchars8 = oobptr0; else memcpy(ffc

17、hars+(nand-oobinfo).oobfree)00,oobptr,(nand-oobinfo).oobfree)01); ret = (nand-write_oob)(nand, off, nand-oobsize, &retlen, ffchars); if (ret != 0) printf(nNAND OOB write error %d at block 0x%08lxn, ret, off); goto closeall; /* Write out the Page data */ ret = (nand-write)(nand, off, nand-oobblock, &

18、retlen, imgptr); if (ret != 0) printf(nNAND write error %d at block 0x%08lxn, ret, off); goto closeall; imgptr += pagelen; imglen -= pagelen; off += nand-oobblock; closeall: nand-oobinfo = old_oobinfo; *size = imgptr - image; if (imglen 0) printf(Data did not fit into device, due to bad blocksn); re

19、turn 1; return 0;#endif /* CFG_NAND_WRITE_YAFFS */ / xiaoyj added end修改第421行，修正在执行nand scrub命令擦除nandflash时异常退出的bug。 if (scrub) #if 0 / changed begin puts(Warning: scrub option will erase all factory set bad blocks!n There is no reliable way to recover them.n Use this command only for testing purpose

20、s if youn are sure of what you are doing!n nReally scrub this NAND flash? n); if (getc() = y & getc() = r) opts.scrub = 1; else puts(scrub abortedn); return -1; #else puts(Warning: scrub option will erase all factory set bad blocks!n There is no reliable way to recover them.n Use this command only f

21、or testing purposes if youn are sure of what you are doing!n nReally scrub this NAND flash? n n n-y-n n); opts.scrub = 1; #endif / changeded end 修改第316行，采用大页nandflash，2KB block + 64B OOB NAND方式。int quiet = 0;#endif#ifdef CFG_NAND_WRITE_YAFFS /added begin int yaffs = 0; /* 1 = 512B block+64 OOB NAND,

22、 0 = 2048+64 NAND */#endif /added end 修改第518行,增加yaffs读写。 ret = nand_write_opts(nand, &opts); #ifdef CFG_NAND_WRITE_YAFFS / added begin else if(!read & s != NULL & 0 = strncmp(s, .yaffs, 6) if (s6 = 1) yaffs = 1; else if (s6 = 2 | s6 = 0) yaffs = 2; if(yaffs) ret = nand_write_yaffs(nand, off, &size,

23、(u_char *)addr, yaffs); #endif /added end修改第1116行，在uboot处增加nand write.yaffs2命令以支持烧写yaffs2。nand write.jffs2 addr off size - read/write size bytes startingn at offset off to/from memory address addrn#ifdef CFG_NAND_WRITE_YAFFS /added begin nand write.yaffs1 addr off size - read/write size bytes starti

24、ngn at offset off to memory address addr yaffs1 or yaffs2 formatn#endif /added end1.4. 修改ether.c增加网络支持默认情况下，uboot1.3.4网络不通，是因为网络初始化时没有打开网络连接，网络不通则yaffs2文件系统没法下载。修改u-boot-1.3.4cpuarm926ejsat91sam9ether.c第33行，使初始化网络状态为打开网络链接。/macb_eth_initialize(0, (void *)AT91_BASE_EMAC, 0x00);macb_eth_initialize(0,

25、(void *)AT91_BASE_EMAC, 0x01);1.5. 修改启动命令和网络参数设置根据SDRAM地址、内核分区情况和本地电脑ip设置修改u-boot-1.3.4includeconfigsat91sam9260ek.h中第165行注释掉如下代码：#define CONFIG_BOOTCOMMAND nand read 0x22000000 0xA0000 0x200000; bootm#define CONFIG_BOOTARGS console=ttyS0,115200 root=/dev/mtdblock5 mtdparts=at91_nand:128k(bootstrap)

26、ro, 256k(uboot)ro,128k(env1)ro, 128k(env2)ro,2M(linux),-(root) rw rootfstype=jffs2增加如下代码：#define CONFIG_BOOTCOMMAND nand read 0x22000000 0x100000 0x200000; nand read 0x23100000 0x400000 0x600000; bootm 0x22000000 #if 0#define CONFIG_BOOTARGS 64M console=ttyS0,115200 initrd 0x23100000,6000000 root=/d

27、ev/ram0 rw #endif #define CONFIG_IPADDR 192.168.100.101 #define CONFIG_ETHADDR 12:34:56:78:90:AB#define CONFIG_SERVERIP 192.168.100.102#define CONFIG_NETMASK 255.255.255.0#define CONFIG_GATEWAYIP 192.168.100.2551.6. 加快断开网络时系统启动速度在网络断开的情况下，系统会不断的搜索是否有网络到达，约5秒后才退出搜索网络，大大降低了系统启动速度。修改u-boot-1.3.4driversnetmacb.c注释掉第304到311行，增加一个延时函数，具体修改如下：#if 0 / changed begin for (i = 0; i name);无网络连接时，延时0.2秒之后就退出搜索网络，启动下一进程。1.7. 编译ubootrootemboard:/xiaoyj/uboot/ u-boot-1.3.4# make这样就可以编译出u-boot.bin，烧写到板子即可。启动信息如下：