the question of the starting of uclinux by u-boot

Hi lucky,

Please strip your linux and u-boot elf files and post the header objdump for both.

Also, please provide the following information:

-- flash base address and size

-- sdram base address and size

-- restart address

-- exception address

Regards,

--Scott

hi Scott:

"Please strip your linux and u-boot elf files and post the header objdump for both."

i do not understand your mean. can you tell me how to do in detail?

"-- flash base address and size

-- sdram base address and size

-- restart address

-- exception address"

my board parameter:

flash: 0x00000000----0x003fffff(4MB)

sdram: 0x00800000----0x00ffffff(8MB)

restart address: 0x00000000

exception address: 0x00800020

TEXT_BASE = 0x00fc0000

u-boot download address: 0x00000000

the kernel of uclinux download address: 0x00040000

the kernel of uclinux load address is 0x00800000

the kernel of uclinux entry address is 0x00800000

the filesystem of uclinux download address: 0x00150000

the filesystem of uclinux load address is 0x00c00000

the filesystem of uclinux entry address is 0x00c00000

vmlinux.bin.gz is 450KB

romfs.bin.gz is 756KB

download method:

mkimage the *.bin.gz to uImage (and romfs)

and then, nios2-flash-program the uImage (and romfs) to NOR flash

thanks

lucky

Hi Lucky,

> > "Please strip your linux and u-boot elf files and post the header objdump for both."

>

> i do not understand your mean. can you tell me how to do in detail?

For u-boot

$ nios2-elf-strip u-boot

$ nios2-elf-objdump -h u-boot

For kernel:

$ nios2-elf-strip vmlinux

$ nios2-elf-objdump -h vmlinux

Another question: are you using a data cache?

Regards,

--Scott

1

i make an experiment about using the u-boot to startup the uclinux by the your said method that folloes as:

For u-boot

$ nios2-elf-strip u-boot

$ nios2-elf-objdump -h u-boot

For kernel:

$ nios2-elf-strip vmlinux

$ nios2-elf-objdump -h vmlinux

and then download to NOR flash.

but, the question is the same to the before question:

the cursor winding in the windows and my developing board's led is not winding(maybe die).

2 "Another question: are you using a data cache?"

my nios2 is the nios/e(no instruction cache and no data cache).

Hi lucky,

> i make an experiment about using the u-boot to startup the uclinux by the

> your said method that folloes as:

...

> and then download to NOR flash.

I was asking you to run nios2-elf-objdump on u-boot and the kernel ... and post

the output in this Nios Forum Topic, so I can see how you have your sections

mapped.

You should also try booting an uncompressed image.

Regards,

--Scott

1 reply to Scott

the output of nios2-elf-objdump -h u-boot:

u-boot: file format elf32-littlenios2

sections:

idx name size vma lma file off algn

0 .text 00017da9 00fc0000 00fc0000 00000094 2**4

contents, alloc, load, readonly, code

1 .u_boot_cmd 000003c0 00fd7dac 00fd7dac 00017e3d 2**2

contents, alloc, load, data

2 .data 00000a6c 00fd816c 00fd816c 000181fd 2**2

contents, alloc, load, data

3 .bss 00003cd4 00fd8be0 00fd8be0 00018c69 2**2

alloc

4 .comment 000007e5 00000000 00000000 00018c69 2**0

contents, readonly

the output of nios2-elf-objdump -h vmlinux:

vmlinux: file format elf32-littlenios2

sections:

idx name size vma lma file off algn

0 .text 000d7aa4 00800000 00800000 00000094 2**3

contents, alloc, load, readonly, code

1 .data 0001c550 008d7ab0 008d7ab0 000d7b38 2**4

contents, alloc, load, data

2 .init 0000d2a4 008f4000 008f4000 000f4088 2**2

contents, alloc, load, code

3 .bss 0000a220 009012b0 009012b0 0010132c 2**4

alloc

4 .sbss 00000022 0090b4d0 0090b4d0 0010132c 2**0

alloc, small_data

5 .eram 00000000 01000000 01000000 0010132c 2**0

contents

6 .romfs .data 00000000 00200000 00200000 0010132c 2**0

contents

7 .comment 00002850 00000000 00000000 0010132c 2**0

contents, readonly

2 i use the custom developing board which is not altera and Microtronix. whether or not i need to port uclinux for my board?

3 can i modify the kernel or filesystem download \ load and entry point address in the memory? if yes, how to do it?

Hi Lucky,

I don't see anything suspicious in your objdump. A few more questions:

1. How did you create your compressed kernel image?

2. Did you try booting an uncompressed image? If not please try booting an

uncompressed u-boot image file -- let us know if you have the same problem.

3. Your image says, "2.6.4 kernel for EP1C6" -- is this correct? Or are you actually

using 2.6.11 or higher?

Regards,

--Scott

hi scott:

"1. How did you create your compressed kernel image?"

i use the command to compress the kernel : gzip -9 vmlinux.bin

mkimage -A nios2 -O linux -T kernel -C gzip -a 0x00800000 -e 0x00800000 -n 'Linux Kernel Image' -d vmlinux.bin.gz uImage.img

mkimage -A nios2 -O linux -T filesystem -C gzip -a 0x00c00000 -e 0x00c00000 -n 'romfs EP1C6' -d romfs.bin.gz romfs.img

"2. Did you try booting an uncompressed image? If not please try booting an

uncompressed u-boot image file -- let us know if you have the same problem."

i use the command according to what you said :

mkimage -A nios2 -O linux -T kernel -C none -a 0x00800000 -e 0x00800000 -n 'Linux Kernel Image' -d vmlinux.bin uImage.img

mkimage -A nios2 -O linux -T filesystem -C none -a 0x00c00000 -e 0x00c00000 -n 'romfs EP1C6' -d romfs.bin romfs.img

$SOPC_KIT_NIOS2/bin/bin2flash --flash=U5 --location=0x00000000 --input=u-boot.bin --output=u-boot.flash

$SOPC_KIT_NIOS2/bin/bin2flash --flash=U5 --location=0x00040000 --input=uImage.img --output=uImage.flash

$SOPC_KIT_NIOS2/bin/bin2flash --flash=U5 --location=0x00200000 --input=romfs.img --output=romfs.flash

and then, i download the three files to the NOR flash by the nios2-flash-programmer. but, when i use the command of "bootm 00040000",

the output:

==> bootm 00040000# # Booting image at 00040000 ...

Image Name: linux kernel Image

Image Type: Nios-II Linux Kernel Image (uncompressed)

Data Size: 1053348 Bytes = 1 MB

Load Address: 00800000

Entry Point: 00800000

Verifying Checksum ... OK

OK

have the same problem.

i am more confused now. why is not ok when i use the u-boot to startup the uncompressed kernel.

if i upload the kernel and romfs to NOR flash, and then, running the nios2-termianl, the output is ok!

i feel the question relates the address. because, i am not setting the any address in making the kernel and romfs. but, i do not know how to do.

"3. Your image says, "2.6.4 kernel for EP1C6" -- is this correct? Or are you actually

using 2.6.11 or higher?"

i do not know the version of uclinux kernel, the "2.6.4 kernel for EP1C6" is added at random.

in fact, the real version is "linux version 2.6.11-uc0(sl@wst-9faecf0fdb1) (gcc version 3.4.1(altera niosii 5.0 b73))"

sorry, i forgot to say: when i make the kernel, i delete:

drivers/char/altera_pio_button \ drivers/ide/ide \ drivers/net/smc91111.

if i do not this, it is always to wrong when i make the kernel.

Maybe you are using JTAG-UART??

After you linux booted up by u-boot, you should use nios2-terminal in NIOS2 shell to see the log of linux booting. By this way, the linux will work ok.

yes, i am using JTAG-UART.

when i use nios2-terminal in NIOS2 shell to see the log of linux booting. By this way, the linux will work ok.

but, when i use the u-boot' bootm command to startup the kernel of uclinux, it always halt to do it.

i use the myself board, not altera and macrotronic' developing board. i do not know to how to porting the kernel to my board. i am vexation. that is a pity.