Linux内核引导在“解压缩Linux”时停止...好的，引导内核

Question

I have a problem about porting kernel from old SH4 to new SH4. Please let me show the difference between them.

[Old SH4]
boot loader: redboot v2.0
kernel version: 2.4

[New SH4]
boot loader: u-boot v2009.03
kernel version: 2.6

In old SH4, a lot of source code is developed based on kernel 2.4, so porting kernel 2.4 to new SH4 looks easier than recompiling source codes in kernel 2.6. So I applied mkimage to the zImage which was developed for old SH4 as shown below.

mkimage -A sh -O linux -T kernel -C none -a 0x8c210000 -e 0x8c210000 -n 'Old kernel' -d zImage uImage

This image is loaded on new SH4 as shown below.

tftpboot 8c800000 uImage
cp.b $(fileaddr) a0100000 $(filesize)
bootm a0100000

However, booting stops after "Uncompressing Linux... Ok, booting the kernel" and hangs. I found that the infinite loop happens at the below lines on kernel/head.S, but I suppose these lines have no problem because kernel/head.S is not customized and it works on old SH4.

   !               Clear BSS area
   mov.l   3f, r1 ! __bss_start
   add     #4, r1
   mov.l   4f, r2 ! _end
   mov     #0, r0
9: cmp/hs　r2, r1
   bf/s    9b     ! while (r1 < r2)
   mov.l　 r0,@-r2

Thus, I guess this problem comes from environment difference between old and new SH4. In old SH4, I execute fconfig command and set variables as shown below.

Load Linux Kernel & File System: true
Linux Kernel Destination address: 0x8c210000
Linux Kernel Source address: 0x80140000
Linux Kernel Size: 0x100000
RAM disk Destination address: 0x8c360000
RAM disk Source address: 0x80140000
RAM disk Size: 0x400000
Modify Linux Kernel Parameter: true
Linux Kernel base address: 0x8c001000
Linux Kernel ENTRY address: 0x8c210000
Linux Kernel INITRD size: 0xc00000
Linux Kernel INITRD start address: 0x360000
Linux Kernel loader type: 1
Linux Kernel mount root read only: 1
Linux Kernel original root device: 0x100
Linux Kernel RAM disk flags: 0
Linux Kernel Enable Virtual Terminal Console: false

I think I can set these parameters on new SH4, though u-boot doesn't have fconfig command. But I couldn't find how to set the parameters Linux Kernel Source address and Linux kernel base address. Is this related to the hang problem? Or any advice about what I should check next will be helpful since I am new to Linux embedded system.

Thanks for your help.

[Edited]
Below infomation is added to show printenv result on u-boot.

bootcmd=icache on
bootm a0100000
bootdelay=2
baudrate=115200
netmask=255.255.255.0
ipaddr=192.168.1.2
serverip=192.168.1.1
gatewayip=0.0.0.0
bootargs=console=ttySC1,115200,N,8 mem=32M ether=8,0x1300,0,0,eth0 video=e1356fb:system:ms104sh4,display:crt,bpp:8,800x600@60
stdin=serial
stdout=serial
stderr=serial

Answer 1

我从未使用过SH4，但过去这对我有帮助： http ： //www.denx.de/wiki/view/DULG/LinuxPostMortemAnalysis