u-boot-2010.03的移植

?

【实验目的】

?????? 了解U-boot-2010.03的代码结构及移植方法。

【实验环境】

1、? Ubuntu 10.10发行版

2、? u-boot-2010.03

3、? FS2410平台

4、? 交叉编译器 arm-none-linux-gnueabi-gcc

【实验步骤】

?????? 说明：后面实验中的命令行提示符是($)则为主机命令(主机上执行)，(#)则为开发板命令(开发板上执行)

1、??? 建立自己的平台

1、? 下载源码

我们可以在下面这个网站上下载最新的和以前任一版本的uboot

ftp://ftp.denx.de/pub/u-boot/

我们这里使用的是u-boot-2010.03.tar.bz2

2、? 解压uboot源码

$ tar jxvf u-boot-2010.03.tar.bz2

3、? 进入到uboot源码

$ cd u-boot-2010.03

4、? 添加FS2410平台信息

我们关心的班级相关内容文件或目录

u-boot-2010.03/Makefile

u-boot-2010.03/cpu/arm920t/start.S

u-boot-2010.03/board/Samsung/smdk2410

u-boot-2010.03/lib_arm

u-boot-2010.03/include/configs/smdk2410.h

?

smdk2410是s3c2410的标准板，我们在smdk2410的基础上做FS2410的移植

$ cd board/samsung/

$ cp? smdk2410? ?fs2410 –a

$ cd? fs2410

$ mv? smdk2410.c fs2410.c

$ vim Makefile

修改

COBJS := smdk2410.o? flash.o

为

COBJS := fs2410.o flash.o

?

$ cd? include/configs

$ cp smdk2410.h? fs2410.h

?

修改u-boot顶层目录下的Makefile，按照smdk2410的内容添加fs2410的内容

$ vim Makefile

在

smdk2410_config : unconfig

@$(MKCONFIG)? $(@:_config=) arm arm920t smdk2410 samsung s3c24x0

?下添加：

fs2410_config : unconfig

@$(MKCONFIG)? $(@:_config=) arm arm920t fs2410 samsung s3c24x0

?

修改编译器

在

ifeq ($(HOSTARCH,$(ARCH))

CROSS_COMPILE ?=

endif

下添加：

ifeq (arm,$(ARCH))

CROSS_COMPILE ?= arm-none-linux-gnueabi-

endif

/////////这一步可以不执行

1、 编译u-boot-2010.03

$ make distclean

$ make fs2410_config

$ make

?

这个时候我们就可以得到一个u-boot.bin也就是我们的目标文件，但是这个文件通常情况下是不能够正常工作的，我们还需要对u-boot源代码进行进一步的修改。

1、??? 针对我们的FS2410平台进行进一步的修改

1、 u-boot源码中的中断屏蔽位

在s3c2410中有11个子中断屏蔽位代码里只有10个

修改cpu/arm920t/start.S

修改

# if defined(CONFIG_S3C2410)

ldr????????r1,=0x3ff

ldr????????r0,=INTSUBMSK

str????????r1,[r0]

# endif

为：

# if defined(CONFIG_S3C2410)

ldr????????r1,=0x7ff

ldr????????r0,[r0]

# endif

2、 修改配置文件include/configs/fs2410.h

1)????? 命令行提示符的修改：

#define??? CONFIG_SYS_PROMPT??????? "SMDK2410 # "

改成：

#define??? CONFIG_SYS_PROMPT??????? "fs2410 # "

2)????? 网络参数设置(可以不修改)

修改

#define CONFIG_ETHADDR???????? 08:00:3e:26:0a:5b

#define CONFIG_NETMASK??? ? 255.255.255.0

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

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

为

#define CONFIG_ETHADDR???????? 11:22:33:44:55:66

#define CONFIG_NETMASK???? 255.255.255.0

#define CONFIG_IPADDR???????????? 192.168.1.222

#define CONFIG_SERVERIP???????? 192.168.1.223

3)????? 内核加载地址的修改

修改

#define ??? CONFIG_SYS_LOAD_ADDR??????? ???? 0x33000000

改成：

#define ??? CONFIG_SYS_LOAD_ADDR???? ? ????? 0x30008000

4)????? Nand功能添加（添加其他功能 历程一样）

对照

include/config_cmd_default.h?? 和? include/config_cmd_all.h

添加我们需要的相应功能。

Nand的功能的添加（观察文件源代码 注意添加内容的位置）

?/* NAND support*/

#define CONFIG_CMD_NAND????????????????

#if defined(CONFIG_CMD_NAND)

#define CONFIG_SYS_MAX_NAND_DEVICE ?????? 1

#define CONFIG_SYS_NAND_BASE ?????? 0x4E000000

#define CONFIG_NAND_S3C2410

?

#define STACK_BASE 0x33f00000

#define STACK_SIZE ?? 0x8000

?

/* Nand Flash */

#define CONFIG_MTD_NAND_VERIFY_WRITE ?1

#endif

5)????? 同时支持nand启动和nor启动

#if defined(CONFIG_S3C2410)

#define CONFIG_S3C2410_NAND_BOOT ? 1???? //nand 启动

#define CONFIG_S3C2410_NOR_BOOT ???? 1???? //nor 启动

#endif

?

6)????? 环境变量保存位置

添加：

#ifdef ????? CONFIG_S3C2410_NOR_BOOT

#define??? CONFIG_ENV_IS_IN_FLASH? 1?????? /*common/env_flash.c */

#define??? CONFIG_ENV_ADDR? (CONFIG_SYS_FLASH_BASE + 0x30000)

#endif

?

#ifdef ????? CONFIG_S3C2410_NAND_BOOT

#define?? CONFIG_ENV_IS_IN_NAND??? 1 /* common/env_nand.c */

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

#define???CONFIG_ENV_OFFSET ?? 0x30000

#define NAND_CTL_BASE?????????????? 0x4E000000

/* Offset */

#define oNFCONF 0x00

#define oNFCMD ? 0x04

#define oNFADDR 0x08

#define oNFDATA ? 0x0c

#define oNFSTAT ? 0x10

#define oNFECC ?? 0x14

#endif

?

7)????? USB功能的添加

#define CONFIG_CMD_FAT????????????????/* FAT support*/

#define CONFIG_CMD_USB????????????????/* USB support*/

#if defined(CONFIG_CMD_USB)

#define CONFIG_DOS_PARTITION

#define CONFIG_USB_OHCI

#define CONFIG_USB_STORAGE

#define CONFIG_SUPPORT_VFAT

#define LITTLEENDIAN

#endif

Ping命令的添加

#define CONFIG_CMD_PING????????????????/* ping support*/

8)????? Norflash(sst39vf1601)及Norflash相关内容的

注释掉

#define CONFIG_AMD_LV400????????1????????/* uncomment this if you have aLV400 flash */

添加

#define CONFIG_SST_39VF1601? 1

?

添加

#ifdef CONFIG_SST_39VF1601

#define PHYS_FLASH_SIZE????????????????0x00200000 /* 2M*/

#define CONFIG_SYS_MAX_FLASH_SECT????????(512)????????/* max number of sectors on one chip */

#endif

?

3、 添加Nand启动功能(修改cpu/arm920t/start.S)

u-boot默认情况下是nar启动，这里我们添加nand启动的内容：

1)??????? 添加头文件

#include <version.h>

#include <status_led.h>

2)??????? 添加nand启动标志位

/*add for env_nand.c*/

?.extern? pbootflag

?@pbootflag:????????????????//1:NOR flash,0:NAND flash

3)??????? 添加BWSCON寄存器的定义（加粗字体为添加内容）

# if defined(CONFIG_S3C2400)

#? define pWTCON????????????????0x15300000

#? define INTMSK????????????????0x14400008????????/* Interupt-Controller base addresses */

#? define CLKDIVN????????0x14800014????????/* clock divisor register */

#else

#? define pWTCON????????????????0x53000000

#? define INTMSK????????????????0x4A000008????????/* Interupt-Controller base addresses */

#? define INTSUBMSK????????0x4A00001C

#? define CLKDIVN????????0x4C000014????????/* clock divisor register */

#? define BWSCON????????0x48000000????????

# endif

4)??????? ?添加启动模式判断Nor启动还是nand启动（加粗字体为添加内容）

/*czm add 2010-8-18*/

ldr r0,=BWSCON

ldr r0,[r0]

ands r0,r0,#6

beq nand_boot

?

#ifndef CONFIG_SKIP_RELOCATE_UBOOT

relocate:????????????????????????????????/* relocate U-Boot to RAM??????????? */

adr????????r0,_start????????????????/* r0 <- current position of code?? */

ldr????????r1,_TEXT_BASE????????????????/* test if we run from flash or RAM */

cmp???? r0,r1????????????????? /* don't reloc during debug???????? */

beq???? stack_setup

?

copy_loop:

ldmia????????r0!,{r3-r10}????????????????/* copy from source address [r0]??? */

stmia????????r1!,{r3-r10}????????????????/* copy to?? target address [r1]??? */

cmp????????r0,r2????????????????????????/* until source end addreee [r2]??? */

ble????????copy_loop

#endif????????/* CONFIG_SKIP_RELOCATE_UBOOT */

#endif

/* add 2010-08-18 */

bl stack_setup

5)??添加NAND启动自搬移代码(在上一步代码下添加)

nand_boot:

#ifdef CONFIG_S3C2410_NAND_BOOT

@ reset NAND

? mov r1,#NAND_CTL_BASE

? ldr r2,=0xf830 @ initial value

? str r2,[r1,#oNFCONF]

? ldr r2,#oNFCONF]

? bic r2,r2,#0x800 @ enable chip

? str r2,#oNFCONF]

? mov r2,#0xff @ RESET command

? strb r2,#oNFCMD]

??

? mov r3,#0 @ wait

nand1:

? add r3,r3,#0x1

? cmp r3,#0xa

? blt nand1

?

nand2:

? ldr r2,#oNFSTAT] @ wait ready

? tst r2,#0x1

? beq nand2

?

? ldr r2,#oNFCONF]

? orr r2,#0x800 @ disable chip

? str r2,#oNFCONF]

?

@ get read to call C functions (for nand_read())

? ldr sp,DW_STACK_START @ setup stack pointer

? mov fp,#0 @ no previous frame,so fp=0

?

@ copy U-Boot to RAM

? ldr r0,=TEXT_BASE

? mov r1,#0x0

? mov r2,#0x30000

? bl nand_read_ll

? tst r0,#0x0

? beq ok_nand_read

?

bad_nand_read:

loop2: b loop2 @ infinite loop

??

ok_nand_read:

?? ldr? r0,=pbootflag

?? mov r1,#0x0

?? str? r1,[r0]

@ verify

? mov r0,#0

? ldr r1,=TEXT_BASE

? mov r2,#0x400 @ 4 bytes * 1024 = 4K-bytes

go_next:

? ldr r3,[r0],#4

? ldr r4,[r1],#4

? teq r3,r4

? bne notmatch

? subs r2,#4

? beq stack_setup

? bne go_next

?

notmatch:

loop3: b loop3 @ infinite loop

#endif @ CONFIG_S3C2410_NAND_BOOT

?

在_start_armboot: .word start_armboot下添加如下代码：

.align 2

DW_STACK_START: .word STACK_BASE + STACK_SIZE - 4

4、 添加nand_read.c为nand启动做支持

在board/samsung/fs2410下添加文件nand_read.c并在这个文件中添加如下内容：

#include <config.h>

?

#define __REGb(x) (*(volatile unsigned char *)(x))

#define __REGi(x) (*(volatile unsigned int *)(x))

#define NF_BASE 0x4e000000

?

# if defined(CONFIG_S3C2410)?

#define NFCONF __REGi(NF_BASE + 0x0)

#define NFCMD __REGb(NF_BASE + 0x4)

#define NFADDR __REGb(NF_BASE + 0x8)

#define NFDATA __REGb(NF_BASE + 0xc)

#define NFSTAT __REGb(NF_BASE + 0x10)

#define BUSY 1

?

#define NAND_SECTOR_SIZE 512

?

#define NAND_BLOCK_MASK (NAND_SECTOR_SIZE - 1)

?

inline void wait_idle(void) {

??? int i;

??? while(!(NFSTAT & BUSY))

????? for(i=0; i<10; i++);

}

/* low level nand read function */

int

nand_read_ll(unsigned char *buf,unsigned long start_addr,int size)

{

??? int i,j;

??? if ((start_addr & NAND_BLOCK_MASK) || (size & NAND_BLOCK_MASK)) {

??????? return -1; /* invalid alignment */

??? }

??? /* chip Enable */

??? NFCONF &= ~0x800;

??? for(i=0; i<10; i++);

??? for(i=start_addr; i < (start_addr + size);) {

????? /* READ0 */

????? NFCMD = 0;

????? /* Write Address */

????? NFADDR = i & 0xff;

????? NFADDR = (i >> 9) & 0xff;

????? NFADDR = (i >> 17) & 0xff;

????? NFADDR = (i >> 25) & 0xff;

????? wait_idle();

????? for(j=0; j < NAND_SECTOR_SIZE; j++,i++) {

?*buf = (NFDATA & 0xff);

?buf++;

????? }

??? }

??? /* chip Disable */

??? NFCONF |= 0x800; /* chip disable */

??? return 0;

}

# endif

并修改board/Samsung/fs2410/ 下Makefile

修改

COBJS????????:= fs2410.o flash.o

为：

COBJS????????:= fs2410.o flash.o nand_read.o

5、? 修改board/samsung/fs2410/flash.c支持sst19lv1601 nor flash芯片

?

修改

#define MAIN_SECT_SIZE 0x10000?? /*64KB*/

为：

#define MAIN_SECT_SIZE 0x1000?? /*4KB for sst39lv1601*/

?

修改

#define CMD_UNLOCK_BYPASS????????0x00000020

为

#define CMD_UNLOCK_BYPASS????????0x000000A0

?

修改

#define MEM_FLASH_ADDR1????????????????(*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x00000555 << 1)))

#define MEM_FLASH_ADDR2????????????????(*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x000002AA << 1)))

为

#define MEM_FLASH_ADDR1????????????????(*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x00005555 << 1)))

#define MEM_FLASH_ADDR2????????????????(*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x00002AAA << 1)))

?

在

#elif defined(CONFIG_AMD_LV800)

?????????????????????????(AMD_MANUFACT & FLASH_VENDMASK) |

?????????????????????????(AMD_ID_LV800B & FLASH_TYPEMASK);

下添加

#elif defined(CONFIG_SST_39VF1601)

????????????????????????(SST_MANUFACT & FLASH_VENDMASK) |

????????????????????????(SST_ID_xF1601 & FLASH_TYPEMASK);

?

?

修改

for (j = 0; j < flash_info[i].sector_count; j++) {

????????if (j <= 3) {

????????????????/* 1st one is 16 KB */

????????????????if (j == 0) {

????????????????????????flash_info[i].start[j] = flashbase + 0;

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

????????????????????????????????/* 2nd and 3rd are both 8 KB */

????????????????????????if ((j == 1) || (j == 2)) {

????????????????????????????????flash_info[i].start[j] =

???????????????????????????????flashbase + 0x4000 + (j -1) *?0x2000;

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

????????????????????????????????/* 4th 32 KB */

????????????????????????if (j == 3) {

????????????????????????????????flash_info[i].start[j] =

????????????????????????????????????????flashbase + 0x8000;

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

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

????????????????????????flash_info[i].start[j] =

????????????????????????????????flashbase + (j - 3)*MAIN_SECT_SIZE;

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

????????}

?

为

for (j = 0; j < flash_info[i].sector_count; j++) {

????????flash_info[i].start[j] =

????????????????flashbase + j*MAIN_SECT_SIZE;

}

?

?

在

case (AMD_MANUFACT & FLASH_VENDMASK):

?????????????????printf ("AMD: ");

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

下添加

case (SST_MANUFACT & FLASH_VENDMASK):

????????????????printf ("SST: ");

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

?

在

case (AMD_ID_LV800B & FLASH_TYPEMASK):

????????????????printf ("1x Amd29LV800BB (8Mbit)n");

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

下添加

case ( SST_ID_xF1601 & FLASH_TYPEMASK):

????????????????printf ("1x 39VF1601n");

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

?

修改

if ((info->flash_id & FLASH_VENDMASK) !=

??? (AMD_MANUFACT & FLASH_VENDMASK)) {

return ERR_UNKNOWN_FLASH_VENDOR;

}

为

if ((info->flash_id & FLASH_VENDMASK) !=

??? (SST_MANUFACT & FLASH_VENDMASK)) {

return ERR_UNKNOWN_FLASH_VENDOR;

}

?

注释掉下面语句

if (!chip

? && (result & 0xFFFF) & BIT_PROGRAM_ERROR)

????????chip = ERR;

??注释掉

*addr = CMD_PROGRAM;

?

6、 修改common/env_flash.c，为nor flash保存环境变量做准备

修改

char * env_name_spec = "Flash";

为

char * nor_env_name_spec = "Flash";

?

修改

env_t *env_ptr = (env_t *)(&environment[0]);

为

extern env_t *env_ptr = (env_t *)(&environment[0]);

?

修改

env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;

为

extern env_t *env_ptr ;

?

添加

extern uchar env_get_char_spec (int index);

并注释掉下面语句

uchar env_get_char_spec (int index)

{

return ( *((uchar *)(gd->env_addr + index)) );

}

?

修改（两个全改）

int env_init(void)

为

int nor_env_init(void)

?

修改

int saveenv(void)

为

int nor_saveenv(void)

?

修改

void env_relocate_spec (void)

为

void nor_env_relocate_spec (void)

?

7、? 修改common/env_nand.c添加nor flash环境变量烧写功能

添加

volatile int? pbootflag=1; //add by lht?? 1->nor? 0->nand

extern int? nor_env_init(void);

?

修改int env_init(void)函数在函数开始添加如下内容：

?if(pbootflag==1) //by lht

{

????????????????env_name_spec = "NOR";

????????????????env_ptr=(env_t *)CONFIG_ENV_ADDR;

????????????????return nor_env_init();

????????}

???????

修改int? saveenv(void)函数，在函数开始添加如下内容

????????if(pbootflag==1)

????????{

????????????????env_name_spec = "NOR";

????????????????return nor_saveenv();

??}

修改void env_relocate_spec (void)函数，在函数开始添加如下内容

?if(pbootflag==1)

?{

?????????return nor_env_relocate_spec();

?}

???

8、 修改SDRAM刷新周期：board/samsung/fs2410/lowlevel_init.S

#define REFCNT? 1113?? /* period=15.6us,HCLK=60Mhz,(2048+1-15.6*60) */

改成：

#define REFCNT? 1268?? /* period=7.8125us,HCLK=100Mhz,(2048+1-7.8125*100) */

9、 链接文件的修改

修改cpu/arm920t/u-boot.lds：

在cpu/arm920t/start.o????? (.text)下添加如下内容：

board/samsung/fs2410/lowlevel_init.o???? (.text)

board/samsung/fs2410/nand_read.o? (.text)

10、???????????? go命令的优化

修改该common/cmd_boot.c

int do_go (cmd_tbl_t *cmdtp,int flag,int argc,char *argv[])

{

ulong????????addr,rc;

int ????rcode = 0;

?

/****add by farsight 2010-8-18**************************************/

char *commandline = getenv("bootargs");

struct param_struct *lht_params=(struct param_struct *)0x30000100;

?

printf("setup linux parameters at 0x30000100n");

memset(lht_params,sizeof(struct param_struct));

lht_params->u1.s.page_size=4096;

lht_params->u1.s.nr_pages=0x4000000>>12;

memcpy(lht_params->commandline,commandline,strlen(commandline)+1);

printf("linux command line is: "%s"n",commandline);

?

/***************************************************************/????????

if (argc < 2) {

cmd_usage(cmdtp);

return 1;

}

?

addr = simple_strtoul(argv[1],NULL,16);

?

printf ("## Starting application at 0x%08lX ...n",addr);

?

/*

?* pass address parameter as argv[0] (aka command name),

?* and all remaining args

?*/

/*********************add by farsight 2010-8-18*********************/

__asm__(

"mov r1,#193n"

"mov????????ip,#0n"

"mcr????????p15,ip,c13,c0,0n"????????/* zero PID */

"mcr????????p15,c7,0n"????????/* invalidate I,D caches */

"mcr????????p15,c10,4n"????????/* drain write buffer */

"mcr????????p15,c8,D TLBs */

"mrc????????p15,c1,0n"????????/* get control register */

"bic????????ip,#0x0001n"????????????????/* disable MMU */

"mov pc,%0n"

"nopn"

:

:"r"(addr)

);

/***************************************************************/

?

rc = do_go_exec ((void *)addr,argc - 1,argv + 1);

if (rc != 0) rcode = 1;

?

printf ("## Application terminated,rc = 0x%lXn",rc);

return rcode;

}

2、??? 重新编译

$ make distclean

$ make fs2410_config

$ make

这个时候我们就可以获得一个我们能够使用的u-boot了