skyeye模拟u-boot在s3c2410上运行
http://www.cnblogs.com/xuqiang/archive/2010/02/23/1953736.html
前面成功的移植了u-boot(其实只能是说是编译成功，还谈不上是真正的移植，(*^__^*) )，下面开始在skyeye中来运行u-boot
在编译u-boot时，所作的修改如下
#ifdef CONFIG_AMD_LV400
#define PHYS_FLASH_SIZE 0x00080000 /* 512KB */
#define CFG_MAX_FLASH_SECT (11) /* max number of sectors on one chip */
#define CFG_ENV_ADDR (CFG_FLASH_BASE + 0x070000) /* addr of environment */
#endif
改为:
#ifdef CONFIG_AMD_LV400
#define PHYS_FLASH_SIZE 0x01000000 /* 16MB */
#define CFG_MAX_FLASH_SECT (128) /* max number of sectors on one chip */
#define CFG_ENV_ADDR (CFG_FLASH_BASE + 0x020000) /* addr of environment */
#endif
根据上面的做作的修改，同时在参考http://blog.chinaunix.net/u1/56374/showart_570048.html
http://hi.baidu.com/yyq669669/blog/item/bb667a109dc3facca7ef3f97.html中的skyeye.conf
文件的配置，做法如下：
新建目录smdk2410，将u-boot编译成功的u-boot拷贝到该目录下，然后将下面的skyeye.conf同样拷贝到该文件夹下。
cpu: arm920t
arch: arm
mach: s3c2410x
mem_bank:map=I,type=RW,addr=0x48000000,size=0x20000000
#注意此处的addr一定要与上面smdk2410.h配置的SDRAM和FLASH的大小与基地址一定要相同，否则启动不起来，卡在那里。
#下面这一句和FLASH一样
mem_bank:map=M,type=RW,addr=0x00000000,size=0x04000000,file=u-boot,boot=yes
#下面这一句和SDRAM一样
mem_bank:map=M,type=RW,addr=0x30000000,size=0x04000000
执行skyeye命令，但是出现错误：Bus Read Error错误
偶然在测试skyeye的testsuites时，同样出现错误，于是怀疑是skyeye的版本问题，所以开始安装skyeye的较低版本(1.2.8)
，解压完下载的skyeye-1.2.8_rc1.tar.gz，在解压完的目录中的README中有下面的information
5 Tested Environment
X86-32:
CygWin/MinGW
gcc-3.4, gcc-4.1.2
Linux (Debian)
gcc-3.3 gcc-3.4
gcc-2.95 gcc-4.0 (doesn't support DBCT)
BeOS (R5.0.3, Exp-Dano)
gcc-2.95 + gcc-3.4.3
X86-64:
Linux (Fedra)
gcc-3.4 for X86-64 (doesn't support DBCT)
由于在ubuntu上没有安装gcc版本，所以得开始安装gcc-3.4，比较省事的方法是下载deb的包来安装，在安装的过程中可能存在
相关依赖项的问题，解决的方案就是“缺哪个安哪个”。gcc-3.4安装完毕之后，在继续安装skyeye 1.2.6版本。
sudo mkdir /opt/skyeye-1.2.6
export CC=gcc-3.4
./configure --prefix=/opt/skyeye-1.2.6/
make
第一次出现:makeinfo : command not found
于是sudo apt-get install texinfo
然后执行
make clean
make
现在skyeye编译完成生成skyeye可执行文件
下面继续测试u-boot
返回smdk2410目录下，执行skyeye命令即可进入u-boot。
xuqiang@ubuntu:~/Desktop/smdk2410$ /opt/skyeye-1.2.6/skyeye -e u-boot
Your elf file is little endian.
arch: arm
cpu info: armv4, arm920t, 41009200, ff00fff0, 2
mach info: name s3c2410x, mach_init addr 0x8069531
arch: arm
uart_mod:0, desc_in:, desc_out:, converter:
SKYEYE: use arm920t mmu ops
Loaded RAM ./u-boot
start addr is set to 0x33f80000 by exec file.
ERROR: s3c2410x_io_write_word(0x4c000000) = 0x00ffffff
ERROR: s3c2410x_io_write_word(0x4c000008) = 0x00048032
U-Boot 1.1.6 (Feb 23 2010 - 05:30:09)
DRAM: 64 MB
Flash: 16 MB
*** Warning - bad CRC, using default environment
In: serial
Out: serial
Err: serial
ERROR: s3c2410x_io_write_word(0x1900030a) = 0x00000000
SMDK2410 # date
ERROR: s3c2410x_io_write_word(0x57000040) = 0xffffffff
ERROR: s3c2410x_io_write_word(0x57000040) = 0xfffffffe
Date: 2065-25-45 (unknown day) Time: 45:85:85
SMDK2410 # help
? - alias for 'help'
autoscr - run script from memory
base - print or set address offset
bdinfo - print Board Info structure
boot - boot default, i.e., run 'bootcmd'
bootd - boot default, i.e., run 'bootcmd'
bootelf - Boot from an ELF image in memory
bootm - boot application image from memory
bootp - boot image via network using BootP/TFTP protocol
bootvx - Boot vxWorks from an ELF image
cmp - memory compare
coninfo - print console devices and information
cp - memory copy
crc32 - checksum calculation
date - get/set/reset date & time
dcache - enable or disable data cache
echo - echo args to console
erase - erase FLASH memory
flinfo - print FLASH memory information
go - start application at address 'addr'
help - print online help
icache - enable or disable instruction cache
iminfo - print header information for application image
imls - list all images found in flash
itest - return true/false on integer compare
loadb - load binary file over serial line (kermit mode)
loads - load S-Record file over serial line
loady - load binary file over serial line (ymodem mode)
loop - infinite loop on address range
md - memory display
mm - memory modify (auto-incrementing)
mtest - simple RAM test
mw - memory write (fill)
nfs - boot image via network using NFS protocol
nm - memory modify (constant address)
printenv- print environment variables
protect - enable or disable FLASH write protection
rarpboot- boot image via network using RARP/TFTP protocol
reset - Perform RESET of the CPU
run - run commands in an environment variable
saveenv - save environment variables to persistent storage
setenv - set environment variables
sleep - delay execution for some time
tftpboot- boot image via network using TFTP protocol
version - print monitor version
下面将上面的注意整理如下：
1.首先是注意的是版本的问题：skyeye需要使用1.2.6的才能运行
2.注意的是skyeye.conf配置文件，该部分参见
我们来分析"include/configs/smdk2410.h"
/*-----------------------------------------------------------------------
* Physical Memory Map
*/
#define CONFIG_NR_DRAM_BANKS 1 /* we have 1 bank of DRAM */
#define PHYS_SDRAM_1 0x30000000 /* SDRAM Bank #1 */起始地址
#define PHYS_SDRAM_1_SIZE 0x04000000 /* 64 MB */大小
#define PHYS_FLASH_1 0x00000000 /* Flash Bank #1 */
#define CFG_FLASH_BASE PHYS_FLASH_1
所以我们的
mem_bank: map=M, type=RW, addr=0x30000000, size=0x01000000
要改为：
mem_bank: map=M, type=RW, addr=0x30000000, size=0x04000000
再看
/*-----------------------------------------------------------------------
* FLASH and environment organization
*/
#define CONFIG_AMD_LV400 1 /* uncomment this if you have a LV400 flash */
#if 0
#define CONFIG_AMD_LV800 1 /* uncomment this if you have a LV800 flash */
#endif
#define CFG_MAX_FLASH_BANKS 1 /* max number of memory banks */
#ifdef CONFIG_AMD_LV800
#define PHYS_FLASH_SIZE 0x00100000 /* 1MB */
#define CFG_MAX_FLASH_SECT (19) /* max number of sectors on one chip */
#define CFG_ENV_ADDR (CFG_FLASH_BASE + 0x0F0000) /* addr of environment */
#endif
#ifdef CONFIG_AMD_LV400
#define PHYS_FLASH_SIZE 0x00080000 /* 512KB */
#define CFG_MAX_FLASH_SECT (11) /* max number of sectors on one chip */
#define CFG_ENV_ADDR (CFG_FLASH_BASE + 0x070000) /* addr of environment */
#endif
看
#define PHYS_FLASH_1 0x00000000 /* Flash Bank #1 */起始地址
#define PHYS_FLASH_SIZE 0x00080000 /* 512KB */大小
所以我们的
mem_bank: map=M, type=RW, addr=0x00000000, size=0x01000000, file=./u-boot, boot=yes
要改为：
mem_bank: map=M, type=RW, addr=0x00000000, size=0x00080000, file=./u-boot, boot=yes
这时候你的skyeye-smdk2410主板就配置好了。
最终的skyeye.conf文件如下：
#skyeye config file sample
cpu: arm920t
mach: s3c2410x
arch: arm
#physical memory
mem_bank: map=M, type=RW, addr=0x00000000, size=0x00080000, file=./u-boot, boot=yes
mem_bank: map=M, type=RW, addr=0x30000000, size=0x04000000
#all peripherals I/O mapping area
mem_bank: map=I, type=RW, addr=0x48000000, size=0x20000000
mem_bank: map=I, type=RW, addr=0x19000300, size=0x00000020
作者：许强
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