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uboot nor flash驱动移植（基于am29lv160bt）之环境变量没法保存

发布时间：2020-12-15 18:16:12 所属栏目：百科 来源：网络整理
导读：前言： ? ? ? ? 声明一下：如果想按照本方法移植的话，需参照国嵌的手册：4-2-6，上面讲解的步骤和解析。 ? ? ? 本人买了一块mini2440，同时买了一套国嵌的实验手册，可是做到4-2-6节的时候出了问题，因为照着实验手册做的话，下到nor flash会提示这个信息，
前言：
? ? ? ? 声明一下：如果想按照本方法移植的话，需参照国嵌的手册：4-2-6，上面讲解的步骤和解析。
? ? ? 本人买了一块mini2440，同时买了一套国嵌的实验手册，可是做到4-2-6节的时候出了问题，因为照着实验手册做的话，下到nor flash会提示这个信息，如下
?
?
上面提示到nor flash芯片不是sst39vf1601，而是那个am29lv160b，呵呵，同时下面的扇区信息也不对，怎么是35个呢？2M存储量，一个是64K，怎么是35个，不是应该是国嵌上的那个32么？
?
同时还有一个疑问：这个移植的最终目的就是实现对nor flash的擦写，可是当你按照手册上的方法命名一个环境变量，保存，重启一下，在显示的时候发现没了。。。。
?
从以上信息可以得出一个结论：你的移植失败了。。。。
一.
为什么呢？因为国嵌的开发板本来是那个 sst39vf1601，可是有很多人买并不是这个（你细心点看看你板子上的nor flash是不是），如果是的话，那移植不会出问题，如果不是（我的就不是），我的上面标的是：S29AL016.....,我查了一下，是spansion公司的（谁知道是啥公司，网上都找不到），这款芯片的id是：122c4（还有一个名字差不多，id是122c9，关于id，这个很重要，我的方法是用jlink来查看的），并且很奇怪，这款芯片和上面图片中的出现的那个AM29LV160T是一个id，也不知道为什么2个公司生产出来的芯片会是一个id，就是因为这是一个id，所以我们可以用AM29LV160T来配置。
?
解释了这么多，意思也该明白了，uboot识别出了你的芯片，可是你按手册上移植的时候并不是按照这个芯片移植的，所以出错了，解决办法（我不知道我的这个方法内部会不会有一些毛病，但是最终显示的界面证明我自己移植成功了）：我是改造了2.6上的移植方法，换成了AM29LV160T:
?
可以自己查看两个芯片的时序图?
?
看到了吧，这两款芯片的操作时序并不一样，所以你要好好改了，具体内容我就不扯了，下面我贴出我移植的关键的2个文件中的代码，你只要把这2个文件的代码复制到你的相应文件中，编译一下就成了：
?
你可以把这2个文件的内容和国嵌4.2.6中移植中的对比一下，有些地方我同样修改了，但是因为这个文件中支持这个nor flash，所以说，有好些步骤，不需要动：
1.board/mini2440/flash.c? （可以直接复制到你的同样目录下的flash.c中（PS把原先的flash.c内容清空，复制一下代码就行了）?
代码贴出如下：

?

#include <common.h>

#include <asm/processor.h>

?

#define CFG_FLASH_WORD_SIZE???? unsigned short?

#define CFG_FLASH_ADDR0???????? 0x555?

#define CFG_FLASH_ADDR1???????? 0x2AA?

#define CFG_FLASH_READ0???????? 0x0000?

#define CFG_FLASH_READ1???????? 0x0001?

#define CFG_FLASH_READ2???????? 0x0002?

?

flash_info_t??? flash_info[CFG_MAX_FLASH_BANKS];

?

static int write_word (flash_info_t *info,ulong dest,ulong data);

?

?

?

static void flash_get_offsets (ulong base,flash_info_t *info)

{

?????? int i;

?????? short n;

?

??????

?????? if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||

?????? ? ??((info->flash_id & FLASH_TYPEMASK) == FLASH_AM160T) ||??

?????? ??? ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {

?????? ??? for (i = 0; i < info->sector_count; i++)

????????????? info->start[i] = base + (i * 0x00010000);

?????? } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) ||

????????????? ?? ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) ||

????????????? ?? ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||

????????????? ?? ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {

?????????????

????????????? for (i=0; i<8; ++i) {?????????????

???????????????????? info->start[i] = base;

???????????????????? base += 8 << 10;

????????????? }

????????????? while (i < info->sector_count) {??

???????????????????? info->start[i] = base;

???????????????????? base += 64 << 10;

???????????????????? ++i;

????????????? }

?????? } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) ||

????????????? ?? ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) ||

????????????? ?? ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||

????????????? ?? ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {

?????????????

????????????? base += info->size;

?????? ?????? i = info->sector_count;

????????????? for (n=0; n<8; ++n) {??????????

???????????????????? base -= 8 << 10;

???????????????????? --i;

???????????????????? info->start[i] = base;

????????????? }

????????????? while (i > 0) {??????????????

???????????????????? base -= 64 << 10;

???????????????????? --i;

???????????????????? info->start[i] = base;

????????????? }

?????? } else {

?????? ??? if (info->flash_id & FLASH_BTYPE) {

?????????????

????????????? info->start[0] = base + 0x00000000;

????????????? info->start[1] = base + 0x00004000;

????????????? info->start[2] = base + 0x00006000;

????????????? info->start[3] = base + 0x00008000;

????????????? for (i = 4; i < info->sector_count; i++) {

???????????????????? info->start[i] = base + (i * 0x00010000) - 0x00030000;

????????????? }

?????? ??? } else {

?????????????

????????????? i = info->sector_count - 1;

????????????? info->start[i--] = base + info->size - 0x00004000;

????????????? info->start[i--] = base + info->size - 0x00006000;

????????????? info->start[i--] = base + info->size - 0x00008000;

????????????? for (; i >= 0; i--) {

???????????????????? info->start[i] = base + i * 0x00010000;

????????????? }

?????? ??? }

?????? }

}

?

void flash_print_info? (flash_info_t *info)

{

?????? int i;

?????? int k;

?????? int size;

?????? int erased;

?????? volatile unsigned long *flash;

?

?????? if (info->flash_id == FLASH_UNKNOWN) {

????????????? printf ("missing or unknown FLASH typen");

????????????? return;

?????? }

?

?????? switch (info->flash_id & FLASH_VENDMASK) {

?????? case FLASH_MAN_AMD:???? printf ("AMD ");??????????? break;

?????? case FLASH_MAN_FUJ:?????? printf ("FUJITSU ");???????????? break;

?????? case FLASH_MAN_SST:????? printf ("SST ");???????????? break;

?????? case FLASH_MAN_STM:???? printf ("ST? ");???????????? break;

?????? default:?????????? printf ("Unknown Vendor ");? break;

?????? }

?

?????? switch (info->flash_id & FLASH_TYPEMASK) {

?????? case FLASH_AM400B:? printf ("AM29LV400B (4 Mbit,bottom boot sect)n");

??????????????????????????? break;

?????? case FLASH_AM400T:? printf ("AM29LV400T (4 Mbit,top boot sector)n");

??????????????????????????? break;

?????? case FLASH_AM800B:? printf ("AM29LV800B (8 Mbit,bottom boot sect)n");

??????????????????????????? break;

?????? case FLASH_AM800T:? printf ("AM29LV800T (8 Mbit,top boot sector)n");

??????????????????????????? break;

?????? case FLASH_AM160B:? printf ("AM29LV160B (16 Mbit,bottom boot sect)n");

??????????????????????????? break;

?????? case FLASH_AM160T:? printf ("AM29LV160T (16 Mbit,top boot sector)n");

??????????????????????????? break; //调用的是这个函数，不用修改

?????? case FLASH_AM320T:? printf ("AM29LV320T (32 M,top sector)n");

??????????????????????????? break;

?????? case FLASH_AM320B:? printf ("AM29LV320B (32 M,bottom sector)n");

??????????????????????????? break;

?????? case FLASH_AMDL322T:???? printf ("AM29DL322T (32 M,top sector)n");

??????????????????????????? break;

?????? case FLASH_AMDL322B:???? printf ("AM29DL322B (32 M,bottom sector)n");

??????????????????????????? break;

?????? case FLASH_AMDL323T:???? printf ("AM29DL323T (32 M,top sector)n");

??????????????????????????? break;

?????? case FLASH_AMDL323B:???? printf ("AM29DL323B (32 M,bottom sector)n");

??????????????????????????? break;

?????? case FLASH_AM640U:? printf ("AM29LV640D (64 M,uniform sector)n");

??????????????????????????? break;

?????? case FLASH_SST800A: printf ("SST39LF/VF800 (8 Mbit,uniform sector size)n");

??????????????????????????? break;

?????? case FLASH_SST160A: printf ("SST39LF/VF160 (16 Mbit,uniform sector size)n");

??????????????????????????? break;

?????? case FLASH_STMW320DT:? printf ("M29W320DT (32 M,top sector)n");

??????????????????????????? break;

?????? default:?????????? printf ("Unknown Chip Typen");

??????????????????????????? break;

?????? }

?

?????? printf ("? Size: %ld MB in %d Sectorsn",

????????????? info->size >> 20,info->sector_count);

?

?????? printf ("? Sector Start Addresses:");

?????? for (i=0; i<info->sector_count; ++i) {

#ifdef CFG_FLASH_EMPTY_INFO

?????????????

????????????? if (i != (info->sector_count-1))

????????????? ? size = info->start[i+1] - info->start[i];

????????????? else

????????????? ? size = info->start[0] + info->size - info->start[i];

????????????? erased = 1;

????????????? flash = (volatile unsigned long *)info->start[i];

????????????? size = size >> 2;???????

????????????? for (k=0; k<size; k++)

????????????? ? {

????????????? ??? if (*flash++ != 0xffffffff)

????????????? ????? {

???????????????????? erased = 0;

???????????????????? break;

????????????? ????? }

????????????? ? }

?

????????????? if ((i % 5) == 0)

???????????????????? printf ("n?? ");

?????????????

????????????? printf (" lX%s%s",

???????????????????? info->start[i],

???????????????????? erased ? " E" : "? ",

???????????????????? info->protect[i] ? "RO " : "?? ");

#else

????????????? if ((i % 5) == 0)

???????????????????? printf ("n?? ");

????????????? printf (" lX%s",

???????????????????? info->protect[i] ? " (RO)" : "???? ");

#endif

?

?????? }

?????? printf ("n");

?????? return;

}

?

?

?

?

static ulong flash_get_size (vu_long *addr,flash_info_t *info)

{

?????? short i;

?????? short n;

?????? CFG_FLASH_WORD_SIZE value;

?????? ulong base = (ulong)addr;

?????? volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *)addr;

?

?????? debug("[%s,%d] Entering ...n",__FUNCTION__,__LINE__);

?

??????

?????? addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA;

?????? addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x0055;

?????? addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x0090;

?

?????? value = addr2[CFG_FLASH_READ0];

?

?????? switch (value) {

?????? case (CFG_FLASH_WORD_SIZE)AMD_MANUFACT:

????????????? info->flash_id = FLASH_MAN_AMD;

????????????? break;

?????? case (CFG_FLASH_WORD_SIZE)FUJ_MANUFACT:

????????????? info->flash_id = FLASH_MAN_FUJ;

????????????? break;

?????? case (CFG_FLASH_WORD_SIZE)SST_MANUFACT:

????????????? info->flash_id = FLASH_MAN_SST;

????????????? break;

?????? case (CFG_FLASH_WORD_SIZE)STM_MANUFACT:

????????????? info->flash_id = FLASH_MAN_STM;

????????????? break;

?????? default:

????????????? info->flash_id = FLASH_UNKNOWN;

????????????? info->sector_count = 0;

????????????? info->size = 0;

????????????? return (0);???????????????????

?????? }

?

?????? value = addr2[CFG_FLASH_READ1];????????

?

?????? switch (value) {

?????? case (CFG_FLASH_WORD_SIZE)AMD_ID_LV400T:

????????????? info->flash_id += FLASH_AM400T;

????????????? info->sector_count = 11;

????????????? info->size = 0x00080000;

????????????? break;?????????????????????????

?

?????? case (CFG_FLASH_WORD_SIZE)AMD_ID_LV400B:

????????????? info->flash_id += FLASH_AM400B;

????????????? info->sector_count = 11;

????????????? info->size = 0x00080000;

????????????? break;?????????????????????????

?

?????? case (CFG_FLASH_WORD_SIZE)AMD_ID_LV800T:

????????????? info->flash_id += FLASH_AM800T;

????????????? info->sector_count = 19;

????????????? info->size = 0x00100000;

????????????? break;?????????????????????????

?

?????? case (CFG_FLASH_WORD_SIZE)AMD_ID_LV800B:

????????????? info->flash_id += FLASH_AM800B;

????????????? info->sector_count = 19;

????????????? info->size = 0x00100000;

????????????? break;?????????????????????????

?

?????? case (CFG_FLASH_WORD_SIZE)AMD_ID_LV160T://调用的是这个

????????????? info->flash_id += FLASH_AM160T;

????????????? info->sector_count = 32;? //原来是35，改为32

????????????? info->size = 0x00200000;

????????????? break;?????????????????????????

?

?????? case (CFG_FLASH_WORD_SIZE)AMD_ID_LV160B:

????????????? info->flash_id += FLASH_AM160B;

????????????? info->sector_count = 35;

????????????? info->size = 0x00200000;

????????????? break;?????????????????????????

?

?????? case (CFG_FLASH_WORD_SIZE)STM_ID_29W320DT:

????????????? info->flash_id += FLASH_STMW320DT;

????????????? info->sector_count = 67;

????????????? info->size = 0x00400000;? break;??????

?

?????? case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320T:

????????????? info->flash_id += FLASH_AM320T;

????????????? info->sector_count = 71;

????????????? info->size = 0x00400000;? break;??????

?

?????? case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320B:

????????????? info->flash_id += FLASH_AM320B;

????????????? info->sector_count = 71;

????????????? info->size = 0x00400000;? break;??????

?

?????? case (CFG_FLASH_WORD_SIZE)AMD_ID_DL322T:

????????????? info->flash_id += FLASH_AMDL322T;

????????????? info->sector_count = 71;

????????????? info->size = 0x00400000;? break;??????

?

?????? case (CFG_FLASH_WORD_SIZE)AMD_ID_DL322B:

????????????? info->flash_id += FLASH_AMDL322B;

????????????? info->sector_count = 71;

????????????? info->size = 0x00400000;? break;??????

?

?????? case (CFG_FLASH_WORD_SIZE)AMD_ID_DL323T:

????????????? info->flash_id += FLASH_AMDL323T;

????????????? info->sector_count = 71;

????????????? info->size = 0x00400000;? break;??????

?

?????? case (CFG_FLASH_WORD_SIZE)AMD_ID_DL323B:

????????????? info->flash_id += FLASH_AMDL323B;

????????????? info->sector_count = 71;

????????????? info->size = 0x00400000;? break;??????

?

?????? case (CFG_FLASH_WORD_SIZE)AMD_ID_LV640U:

????????????? info->flash_id += FLASH_AM640U;

????????????? info->sector_count = 128;

????????????? info->size = 0x00800000;? break;??????

?

?????? case (CFG_FLASH_WORD_SIZE)SST_ID_xF800A:

????????????? info->flash_id += FLASH_SST800A;

????????????? info->sector_count = 16;

????????????? info->size = 0x00100000;

????????????? break;?????????????????????????

?

?????? case (CFG_FLASH_WORD_SIZE)SST_ID_xF160A:

????????????? info->flash_id += FLASH_SST160A;

????????????? info->sector_count = 32;

????????????? info->size = 0x00200000;

????????????? break;?????????????????????????

?

?????? default:

????????????? info->flash_id = FLASH_UNKNOWN;

????????????? return (0);???????????????????

?

?????? }

?

??????

?????? if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||

?????? ?? ?((info->flash_id & FLASH_TYPEMASK) == FLASH_AM160T) || //添加的，原理同上

?????? ??? ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {

?????? ??? for (i = 0; i < info->sector_count; i++)

????????????? info->start[i] = base + (i * 0x00010000);

?????? } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) ||

????????????? ?? ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) ||

????????????? ?? ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||

????????????? ?? ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {

?????????????

????????????? for (i=0; i<8; ++i) {?????????????

???????????????????? info->start[i] = base;

???????????????????? base += 8 << 10;

????????????? }

????????????? while (i < info->sector_count) {??

???????????????????? info->start[i] = base;

???????????????????? base += 64 << 10;

???????????????????? ++i;

????????????? }

?????? } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) ||

????????????? ?? ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) ||

????????????? ?? ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||

????????????? ?? ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {

?????????????

????????????? base += info->size;

????????????? i = info->sector_count;

????????????? for (n=0; n<8; ++n) {??????????

???????????????????? base -= 8 << 10;

???????????????????? --i;

???????????????????? info->start[i] = base;

????????????? }

????????????? while (i > 0) {??????????????

???????????????????? base -= 64 << 10;

???????????????????? --i;

???????????????????? info->start[i] = base;

????????????? }

?????? } else if ((info->flash_id & FLASH_TYPEMASK) == FLASH_STMW320DT) {

?????????????

????????????? base += info->size;

????????????? i = info->sector_count;

?????????????

????????????? base -= 16 << 10;

????????????? --i;

????????????? info->start[i] = base;

?????????????

????????????? for (n=0; n<2; ++n) {

???????????????????? base -= 8 << 10;

???????????????????? --i;

???????????????????? info->start[i] = base;

????????????? }

?????????????

????????????? base -= 32 << 10;

????????????? --i;

????????????? info->start[i] = base;

?

????????????? while (i > 0) {??????????????

???????????????????? base -= 64 << 10;

???????????????????? --i;

???????????????????? info->start[i] = base;

????????????? }

?????? } else {

?????? ??? if (info->flash_id & FLASH_BTYPE) {

?????????????

????????????? info->start[0] = base + 0x00000000;

????????????? info->start[1] = base + 0x00004000;

????????????? info->start[2] = base + 0x00006000;

????????????? info->start[3] = base + 0x00008000;

????????????? for (i = 4; i < info->sector_count; i++) {

???????????????????? info->start[i] = base + (i * 0x00010000) - 0x00030000;

????????????? }

?????? ??? } else {

?????????????

????????????? i = info->sector_count - 1;

????????????? info->start[i--] = base + info->size - 0x00004000;

????????????? info->start[i--] = base + info->size - 0x00006000;

????????????? info->start[i--] = base + info->size - 0x00008000;

????????????? for (; i >= 0; i--) {

???????????????????? info->start[i] = base + i * 0x00010000;

????????????? }

?????? ??? }

?????? }

?

??????

?????? for (i = 0; i < info->sector_count; i++) {

?????????????

?????????????

????????????? addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);

????????????? if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)

????????????? ? info->protect[i] = 0;

????????????? else

????????????? ? info->protect[i] = addr2[CFG_FLASH_READ2] & 1;

?????? }

?

??????

?????? if (info->flash_id != FLASH_UNKNOWN) {

????????????? addr2 = (CFG_FLASH_WORD_SIZE *)info->start[0];

????????????? *addr2 = (CFG_FLASH_WORD_SIZE)0x00F0;?

?????? }

?

?????? return (info->size);

}

?

?

unsigned long flash_init (void)

{

??????? unsigned long size_b0;

??????? int i;

?

???????

??????? for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {

??????????????? flash_info[i].flash_id = FLASH_UNKNOWN;

??????? }

?

???????

?

??????? size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE,&flash_info[0]);

?

??????? if (flash_info[0].flash_id == FLASH_UNKNOWN) {

??????????????? printf ("## Unknown FLASH on Bank 0 - Size = 0xlx = %ld MBn",

??????????????????????? size_b0,size_b0<<20);

??????? }

?

???????

??????? flash_get_offsets (0,&flash_info[0]);

?

???????

??????? (void)flash_protect(FLAG_PROTECT_SET,

??????????????????????????? -CFG_MONITOR_LEN,

??????????????????????????? 0xffffffff,

??????????????????????????? &flash_info[0]);

?

??????? flash_info[0].size = size_b0;

?

??????? return (size_b0);

}

?

?

int??? flash_erase (flash_info_t *info,int s_first,int s_last)

{

?????? volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *)(info->start[0]);

?????? volatile CFG_FLASH_WORD_SIZE *addr2;

?????? int flag,prot,sect,l_sect;

?????? ulong start,now,last;

?????? int i;

?

?????? if ((s_first < 0) || (s_first > s_last)) {

????????????? if (info->flash_id == FLASH_UNKNOWN) {

???????????????????? printf ("- missingn");

????????????? } else {

???????????????????? printf ("- no sectors to erasen");

????????????? }

????????????? return 1;

?????? }

?

?????? if (info->flash_id == FLASH_UNKNOWN) {

????????????? printf ("Can't erase unknown flash type - abortedn");

????????????? return 1;

?????? }

?

?????? prot = 0;

?????? for (sect=s_first; sect<=s_last; ++sect) {

????????????? if (info->protect[sect]) {

???????????????????? prot++;

????????????? }

?????? }

?

?????? if (prot) {

????????????? printf ("- Warning: %d protected sectors will not be erased!n",

???????????????????? prot);

?????? } else {

????????????? printf ("n");

?????? }

?

?????? l_sect = -1;

?

??????

?????? flag = disable_interrupts();

?

??????

?????? for (sect = s_first; sect<=s_last; sect++) {

????????????? if (info->protect[sect] == 0) {?????

????????????? ??? addr2 = (CFG_FLASH_WORD_SIZE *)(info->start[sect]);

????????????? ??? if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {

???????????????????? addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;

???????????????????? addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;

???????????????????? addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00800080;

???????????????????? addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;

???????????????????? addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;

???????????????????? addr2[0] = (CFG_FLASH_WORD_SIZE)0x00500050;?

???????????????????? for (i=0; i<50; i++)

???????????????????? ? udelay(1000);?

????????????? ??? } else {

???????????????????? if (sect == s_first) {

????????????????????

???????????????????? printf("select sector erase n");? //我添加的，实验证明，在我进行saveenv是，显示了这条信息，说明，进入了着个if中

???????????????????? ??? addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA;

???????????????????? ??? addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x0055;

???????????????????? ??? addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x0080;

???????????????????? ??? addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA;

???????????????????? ??? addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x0055;

???????????????????? }

???????????????????? addr2[0] = (CFG_FLASH_WORD_SIZE)0x0030;?

????????????? ??? }

????????????? ??? l_sect = sect;

????????????? }

?????? }

?

??????

?????? if (flag)

????????????? enable_interrupts();

?

??????

?????? udelay (1000);

?

??????

?????? if (l_sect < 0)

????????????? goto DONE;

?

?????? start = get_timer (0);

?????? last? = start;

?????? addr = (CFG_FLASH_WORD_SIZE *)(info->start[l_sect]);

?????? while ((addr[0] & (CFG_FLASH_WORD_SIZE)0x0080) != (CFG_FLASH_WORD_SIZE)0x0080) {

????????????? if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {

???????????????????? printf ("Timeoutn");

???????????????????? return 1;

????????????? }

?????????????

????????????? if ((now - last) > 1000) {?????

???????????????????? putc ('.');

???????????????????? last = now;

????????????? }

?????? }

?

DONE:

??????

?????? addr = (CFG_FLASH_WORD_SIZE *)info->start[0];

?????? addr[0] = (CFG_FLASH_WORD_SIZE)0x00F0;

?

?????? printf (" donen");

?????? return 0;

}

?

?

int write_buff (flash_info_t *info,uchar *src,ulong addr,ulong cnt)

{

?????? ulong cp,wp,data;

?????? int i,l,rc;

?

?????? wp = (addr & ~3);

?

??????

?????? if ((l = addr - wp) != 0) {

????????????? data = 0;

????????????? for (i=0,cp=wp; i<l; ++i,++cp) {

#ifdef CONFIG_MINI2440

???????????????????? data = data | ((*(uchar *)cp)<<(8*i));

#else

???????????????????? data = (data << 8) | (*(uchar *)cp);

#endif

????????????? }

????????????? for (; i<4 && cnt>0; ++i) {

#ifdef CONFIG_MINI2440

???????????????????? data = data? | ((*src++)<<(8*i));

#else

???????????????????? data = (data << 8) | *src++;

#endif

???????????????????? --cnt;

???????????????????? ++cp;

????????????? }

????????????? for (; cnt==0 && i<4; ++i,++cp) {

#ifdef CONFIG_MINI2440

???????????????????? data = data | ((*(uchar *)cp)<<(8*i));

#else

???????????????????? data = (data << 8) | (*(uchar *)cp);

#endif

????????????? }

?

????????????? if ((rc = write_word(info,data)) != 0) {

???????????????????? return (rc);

????????????? }

????????????? wp += 4;

?????? }

?

??????

?????? while (cnt >= 4) {

????????????? data = 0;

#ifdef CONFIG_MINI2440

????????????? data = (*(ulong*)src);

????????????? src += 4;

#else

????????????? for (i=0; i<4; ++i) {

???????????????????? data = (data << 8) | *src++;

????????????? }

#endif

????????????? if ((rc = write_word(info,data)) != 0) {

???????????????????? return (rc);

????????????? }

????????????? wp? += 4;

????????????? cnt -= 4;

?????? }

?

?????? if (cnt == 0) {

????????????? return (0);

?????? }

?

??????

?????? data = 0;

?????? for (i=0,cp=wp; i<4 && cnt>0; ++i,++cp) {

#ifdef CONFIG_MINI2440

????????????? data = data? | ((*src++)<<(8*i));

#else

?????? ?????? data = (data << 8) | *src++;

#endif

????????????? --cnt;

?????? }

?????? for (; i<4; ++i,++cp) {

#ifdef CONFIG_MINI2440

????????????? data = data | ((*(uchar *)cp)<<(8*i));

#else

????????????? data = (data << 8) | (*(uchar *)cp);

#endif

?????? }

?

?????? return (write_word(info,data));

}

?

static int write_word (flash_info_t *info,ulong data)

{

?????? volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *)(info->start[0]);

?????? volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *)dest;

?????? volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *)&data;

?????? ulong start;

?????? int flag;

?????? int i;

?

??????

?????? if ((*((volatile ulong *)dest) & data) != data) {

????????????? return (2);

?????? }

??????

?????? flag = disable_interrupts();

?

?????? for (i=0; i<4/sizeof(CFG_FLASH_WORD_SIZE); i++)

?????? ? {

?????? ?? ?addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA;

?????? ??? addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x0055;

?????? ??? addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00A0;

?

?????? ??? dest2[i] = data2[i];

?

?????? ???

?????? ??? if (flag)

?????? ????? enable_interrupts();

?

?????? ? ??

?????? ??? start = get_timer (0);

?????? ??? while ((dest2[i] & (CFG_FLASH_WORD_SIZE)0x0080) !=

????????????? ?? (data2[i] & (CFG_FLASH_WORD_SIZE)0x0080)) {

?????? ????? if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {

????????????? return (1);

?????? ????? }

?????? ??? }

?????? ? }

?

?????? return (0);

}

?

?
2.关于include/configs/mini2440.h?

?

#ifndef __CONFIG_H

#define __CONFIG_H

?

#define CONFIG_ARM920T??????? 1????

#define??? CONFIG_S3C2440????????????? 1????

#define CONFIG_MINI2440??????? 1????

#define CONFIG_SYS_CLK_FREQ???? 12000000

?

?

#define USE_920T_MMU??????????? 1

#undef CONFIG_USE_IRQ????????????????

?

#define CFG_MALLOC_LEN????????????? (CONFIG_ENV_SIZE + 128*1024)

#define CFG_GBL_DATA_SIZE??? 128?

?

#if 0

#define CONFIG_DRIVER_CS8900???? 1????

#define CS8900_BASE????????? 0x19000300

#define CS8900_BUS16??????? 1

#endif

?

#define CONFIG_DRIVER_DM9000 1

#define CONFIG_DM9000_USE_16BIT 1

#define CONFIG_DM9000_BASE 0x20000300

#define DM9000_IO 0x20000300

#define DM9000_DATA 0x20000304

?

#define CONFIG_SERIAL1????????? 1???

?

#define??? CONFIG_RTC_S3C24X0???? 1

?

#define CONFIG_ENV_OVERWRITE

?

#define CONFIG_BAUDRATE???????????? 115200

?

?

#define CONFIG_BOOTP_BOOTFILESIZE

#define CONFIG_BOOTP_BOOTPATH

#define CONFIG_BOOTP_GATEWAY

#define CONFIG_BOOTP_HOSTNAME

?

?

#include <config_cmd_default.h>

?

#define CONFIG_CMD_CACHE

#define CONFIG_CMD_DATE

#define CONFIG_CMD_ELF

?

#define CONFIG_CMD_PING

?

#define CONFIG_BOOTDELAY?? 3

#define CONFIG_NETMASK????????? 255.255.255.0

#define CONFIG_IPADDR?????????? 10.0.0.110

#define CONFIG_SERVERIP????????????? 10.0.0.1

?

#if defined(CONFIG_CMD_KGDB)

#define CONFIG_KGDB_BAUDRATE? 115200??????????

#define CONFIG_KGDB_SER_INDEX?????? 1???????????

#endif

?

#define??? CFG_LONGHELP??????????????? ??????

#define??? CFG_PROMPT???????????? "Mini2440 # "?

#define??? CFG_CBSIZE??????? 256????????

#define??? CFG_PBSIZE (CFG_CBSIZE+sizeof(CFG_PROMPT)+16)

#define??? CFG_MAXARGS????????? 16??????????

#define CFG_BARGSIZE???????????? CFG_CBSIZE

?

#define CFG_MEMTEST_START 0x30000000???

#define CFG_MEMTEST_END?????????? 0x33F00000??

?

#undef? CFG_CLKS_IN_HZ?????????????

?

#define??? CFG_LOAD_ADDR???????????? 0x33000000???

?

#define??? CFG_HZ?????????????? 1562500

?

#define CFG_BAUDRATE_TABLE?????? { 9600,19200,38400,57600,115200 }

?

#define CONFIG_STACKSIZE???? (128*1024)????

#ifdef CONFIG_USE_IRQ

#define CONFIG_STACKSIZE_IRQ??? (4*1024)

#define CONFIG_STACKSIZE_FIQ???? (4*1024)

#endif

?

#define CONFIG_NR_DRAM_BANKS 1???? ??

#define PHYS_SDRAM_1??????????? 0x30000000

#define PHYS_SDRAM_1_SIZE?? 0x04000000

?

#define PHYS_FLASH_1????????????? 0x00000000

?

#define CFG_FLASH_BASE???????? PHYS_FLASH_1

?

#if 0

#define CONFIG_AMD_LV400??? 1????

#define CONFIG_AMD_LV800??? 1????

#endif

?

#define CFG_MAX_FLASH_BANKS??? 1????

#ifdef CONFIG_AMD_LV800

#define PHYS_FLASH_SIZE??????? 0x00100000

#define CFG_MAX_FLASH_SECT????? (19)

#define CONFIG_ENV_ADDR??????????? (CFG_FLASH_BASE + 0x0F0000)

#endif

#ifdef CONFIG_AMD_LV400

#define PHYS_FLASH_SIZE??????? 0x00080000

#define CFG_MAX_FLASH_SECT????? (11)

#define CONFIG_ENV_ADDR??????????? (CFG_FLASH_BASE + 0x070000)

#endif

?

#define PHYS_FLASH_SIZE??????? 0x00200000

#define CFG_MAX_FLASH_SECT????? (32)

#define CONFIG_ENV_ADDR??????????? (CFG_FLASH_BASE + 0x030000)

#define CFG_MONITOR_BASE TEXT_BASE

#define CFG_MONITOR_LEN??????????? (256*1024)

#define CFG_FLASH_ERASE_TOUT?? (5*CFG_HZ)

#define CFG_FLASH_WRITE_TOUT? (5*CFG_HZ)

?

#define??? CONFIG_ENV_IS_IN_FLASH???? 1

#define CONFIG_ENV_SIZE????????????? 0x10000?

?

#endif????

?完成后，重新编译下就行了

（编辑：李大同）

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