求教大侠们一个问题啊,我手头有一个TQ2400开发板,刚移植了uboot,修改了flash.h和flash.c,nor flash是EN29LV160AB,nand flash没动
烧录到norflash之后执行saveenv,提示start address not on sector boundary,请问这是未配置nand flash还是nor flash设置错误的原因啊,有何修改良策啊!谢谢大家的指点!
我移植Nor Flash参照了如下的帖子:
/*-----------------------------------------------------------------------
* FLASH and environment organization
*/
#if 0 //注释掉下面两个类型的Nor Flash设置,因为不是我们所使用的型号
#define CONFIG_AMD_LV400 1 /* uncomment this if you have a LV400 flash */
#define CONFIG_AMD_LV800 1 /* uncomment this if you have a LV800 flash */
#endif
#define CONFIG_SYS_MAX_FLASH_BANKS 1 /* max number of memory banks */
#ifdef CONFIG_AMD_LV800
#define PHYS_FLASH_SIZE 0x00100000 /* 1MB */
#define CONFIG_SYS_MAX_FLASH_SECT (19) /* max number of sectors on one chip */
#define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + 0x0F0000) /* addr of environment */
#endif
#ifdef CONFIG_AMD_LV400
#define PHYS_FLASH_SIZE 0x00080000 /* 512KB */
#define CONFIG_SYS_MAX_FLASH_SECT (11) /* max number of sectors on one chip */
#define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + 0x070000) /* addr of environment */
#endif
//第175行添加如下内容
#define CONFIG_EON_29LV160AB 1 //添加TQ2440开发板Nor Flash设置
#define PHYS_FLASH_SIZE 0x200000 //我们开发板的Nor Flash是2M
#define CONFIG_SYS_MAX_FLASH_SECT (35) //根据EN29LV160AB的芯片手册描述,共35个扇区
#define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + 0x80000) //暂设置环境变量的首地址为0x80000 //在256K处放uboot参数
5、添加Norflash的information
vi include/flash.h
第181行添加
#define EON_ID_LV160AB 0x22492249
6、修改norflash的驱动,在u-boot中对Nor Flash的操作分别有初始化、擦除和写入,所以我们主要修改与硬件密切相关的三个函数flash_init、flash_erase、write_hword。
vi board/samsung/smdk2440/flash.c
由-One 8-Kword, two 4-Kword, one 16-Kword,and thirty-one 32-Kword sectors(word mode)
可知主要扇区大小为32k,so修改第31行
#define MAIN_SECT_SIZE 0x8000 //定义为32k,主要扇区的大小
#define MEM_FLASH_ADDR1 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x00000555 << 1)))
#define MEM_FLASH_ADDR2 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x000002AA << 1)))
由于我们是把norflash连接到了s3c2440的bank0上,因此norflash中的地址相对于s3c2440来说基址为0x00000000,即CONFIG_SYS_FLASH_BASE = 0。
而之所以又把norflash中的地址向左移一位(即乘以2),是因为我们是把s3c2440的ADDR1连接到了norflash的A0上的缘故。
由数据手册可知EN29LV160AB第0扇区大小为8K,第1、2为4K,第3为16K,后面31扇区为32K。前面4个扇区加起来刚好是主要扇区的大小 = 32K, 所以修改87行下如下
for (j = 0; j < flash_info.sector_count; j++)
{
if (j <= 3)
{
/* 1st one is 8 KB */
if (j == 0)
{
flash_info.start[j] = flashbase + 0;
}
/* 2nd and 3rd are both 4 KB */
if ((j == 1) || (j == 2))
{
flash_info.start[j] = flashbase + 0x2000 + (j - 1) * 0x1000;
}
/* 4th 16 KB */
if (j == 3)
{
flash_info.start[j] = flashbase + 0x4000;
}
}
else
{
flash_info.start[j] = flashbase + (j - 3) * MAIN_SECT_SIZE;
}
}
size += flash_info.size;
修改flash_print_info,添加EN29LV160AB相关信息如下:
switch (info->flash_id & FLASH_VENDMASK) {
case (AMD_MANUFACT & FLASH_VENDMASK):
printf ("AMD: ");
break;
case (EON_MANUFACT & FLASH_VENDMASK):
printf ("EON: ");
break;
default:
printf ("Unknown Vendor ");
break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case (AMD_ID_LV400B & FLASH_TYPEMASK):
printf ("1x Amd29LV400BB (4Mbit)\n");
break;
case (AMD_ID_LV800B & FLASH_TYPEMASK):
printf ("1x Amd29LV800BB (8Mbit)\n");
break;
case (EON_ID_LV160AB & FLASH_TYPEMASK):
printf ("1x EN29LV160AB (16Mbit)\n");
break;
default:
printf ("Unknown Chip Type\n");
goto Done;
break;
}
修改int flash_erase (flash_info_t * info, int s_first, int s_last)
if ((info->flash_id & FLASH_VENDMASK) !=
(EON_MANUFACT & FLASH_VENDMASK)) {
return ERR_UNKNOWN_FLASH_VENDOR;
7、至此,uboot关于Norflash已经移植好
make distclean
make smdk2440_config
make即可生成u-boot.bin
下载到板子的Norflash,在命令台输入saveenv即可
[SMDK2440]# saveenv
Saving Environment to Flash...
Un-Protected 2 sectors
Erasing Flash...Erasing sector 19 ... ok.
Erasing sector 20 ... ok.
Erased 2 sectors
Writing to Flash... done
Protected 2 sectors
[SMDK2440]# flinfo
Bank # 1: EON: 1x EN29LV160AB (16Mbit)
Size: 2 MB in 35 Sectors
Sector Start Addresses:
00000000 (RO) 00002000 (RO) 00003000 (RO) 00004000 (RO) 00008000 (RO)
00010000 (RO) 00018000 (RO) 00020000 00028000 00030000
00038000 00040000 00048000 00050000 00058000
00060000 00068000 00070000 00078000 00080000
00088000 00090000 00098000 000A0000 000A8000
000B0000 000B8000 000C0000 000C8000 000D0000
000D8000 000E0000 000E8000 000F0000 000F8000
[SMDK2440]#
但是我照着做结果却是start address not on sector boundary
谢谢大家的指点! |