This guide worked for me. Thanks hippo! initramfs cuts down on my flash memory requirements a lot. http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/smile.gif To others planning to use the above guide, here are some things I ran into: - Before starting, make sure you have bison, flex, and dos2unix. Bison and flex are probably available as packages for your Linux distribution. dos2unix is a common tool, but amazingly I didn&#39;t have it and my Linux distribution didn&#39;t have a package for it! If it&#39;s the same with you, then the simplest thing to do is to use the two-line perl script for dos2unix that they give here: http://soft.zoneo.net/linux/dos_to_unix.php (http://soft.zoneo.net/linux/dos_to_unix.php). Name the script "dos2unix" (without any extension), make it executable, and put it in your path. (Note: don&#39;t get the fancy dos2unix that converts between DOS, UNIX, and Mac in any direction. It&#39;ll break the build.) - The build process for elf2flt tries to use a static libc library, which you might not have. If the build for it fails with an error like "ld: cannot find -lc", then that&#39;s probably your problem. However, you can just change the elf2flt build process to use shared libraries. After the build fails due to the error, edit buildroot/toolchain_build_nios2/elf2flt/Makefile and remove the "-static" flag in LDFLAGS. Then run "make" and "make install" in the elf2flt directory to finish it, and then continue the rest of the build process by running "make" in the buildroot directory. - The build process automatically downloads additional source code from predetermined locations on the web. However, I found that some of the sites it tries to access don&#39;t exist anymore (or at least they were down when I was doing this). If a program called "wget" keeps trying to download from some URL, that&#39;s probably what&#39;s wrong. To fix this, google for the last part of the URL that it&#39;s trying to access (e.g. "gcc-3.4.3.tar.gz"). You should find a working link to that file somewhere on the first page of results. Use your browser&#39;s "Copy Link Location" feature to get the URL of the file. Next, grep the buildroot tree for the URL that wget is using (e.g. grep -R "mirrors\.rcn\.net" ~/buildroot). One of the results should be a line like GCC_SITE=http://mirrors.rcn.net/.../gcc-3.4.3.tar.gz in some makefile or something. Edit that file and change that line to use the URL that you found instead. Then resume the build process by running "make" in the buildroot directory. The wget step should then work. - If you configured your kernel to not support loadable modules, or if you just don&#39;t need any on your system, then you can skip the two steps labeled "copy module files to rootfs and generate modules.dep" and "rebuild image for initramfs". As a note, I built buildroot using gcc version 3.4.5.

removed. goto post#11 for kernel 2.6.15.2

Hi hippo! I created a patch for the 2.6.11 kernel to include support for a timer called watchdog configured as a watchdog in SOPC-builder. I think it&#39;s not specific to 2.6.11 so you could include this in the patch-set if you like. The more drivers standard available (or in one patch) the more attractive the Nios2 platform gets! Respect for the work you&#39;ve done so far! Walter Goossens

It is easy to compile a simple program, as pointed out by leonqin and tschmelcher. nios2-linux-uclibc-gcc hello.c -o hello -elf2flt The copy hello to ~/rootfs/bin, and rebuild kernel image for initramfs.

buildroot to build toolchain on Linux

107 Replies

Altera_Forum
Honored Contributor
20 years ago
-- updated the kernel3 is removed, and use the kernel in post#1
Here is the updated kernel, which still need more testing.
It included zImage, epcs mtd, avalon watchdog, and altera pci host.

Download the attached kernel3.zip to ~/download dir.
# to prepare new kernel source cd ~/download echo "prepare new kernel source" unzip kernel3.zip wget -N http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.15.6.tar.bz2 wget -N http://www.uclinux.org/pub/uClinux/uClinux-2.6.x/linux-2.6.15-uc0.patch.gz cd ~ tar jxf ~/download/linux-2.6.15.6.tar.bz2 cd ~/linux-2.6.15.6 zcat ~/download/linux-2.6.15-uc0.patch.gz | patch -p1 patch -p0 <~/download/linux-2.6.15.6-nios2-01.diff cp ~/download/kernel2.config .config

To use EPCS as MTD, and mount jffs2 on it, check the very nice doc,
http://via.dynalias.org/svn/uclinux/doc/trunk/epcs-ug.pdf (http://via.dynalias.org/svn/uclinux/doc/trunk/epcs-ug.pdf)

To enable altera pci host bridge support, in kernel config,
Bus options (PCI, PCMCIA, EISA, MCA, ISA)
[*] PCI support
[*] Altera PCI host bridge

You have to update arch/nios2nommu/drivers/pci/altpci.c , look at "FIX ME".
eg, update the number of irqn in sample hardware design to 8.
http://forum.niosforum.com/forum/index.php?showtopic=3059 (http://forum.niosforum.com/forum/index.php?showtopic=3059)
dev0 is sdram,
dev1 is your pci device1, using irqn_0 to irqn_3 for inta..intd
dev2 is your pci device2, using irqn_4 to irqn_7 for inta..intd

I shall write more doc of them when I have time.
Altera_Forum
Honored Contributor
20 years ago
I can verify that the 2.6.15.6 kernel builds, and the SMC91111 driver works OK.
Well done hippo and atlenisse
Altera_Forum
Honored Contributor
20 years ago
hi hippo:
Today I find elf2flt_ld.zip in your# post1.
do I must use the diff ?
Altera_Forum
Honored Contributor
20 years ago
Hi alex,
It is not needed. It is for c++ only. And c++ still has problems yet.
Altera_Forum
Honored Contributor
20 years ago
--- Quote Start ---
originally posted by hippo@Feb 17 2006, 12:40 AM
hi alex,

1. the ccache is not required, you can disable it.
cd ~/buildroot
make menuconfig
toolchain options--> [ ] enable ccache support?
make

2. ignore the watchdog patch fail of the new kernel. you can update the watchdog makefile later.
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--- quote end ---

--- Quote End ---

Hi hippo:

1)I am install nios2 toolchains on PC of my home.In process, I meet the question of not to concect the ccache download web again. follow you above guide , I disable the option of ccache support, then make it again. But make failed.

2)suggest: can you change the ccache download web site in the builld fille,or
download all *.tar.bz2, *.tar.gz to download dir from interrelated web site before
exec the step "./build0207".Because In sometimes some case of build fail by some websites not steady. the other way can you give the method of how to instead the
original connect web site in your build file?

Thank you.
Altera_Forum
Honored Contributor
20 years ago
hi hippo:

I find the http://ccache.samba.org/ftp/ccache/ccache-2.4.tar.gz (http://ccache.samba.org/ftp/ccache/ccache-2.4.tar.gz) change to
http://samba.org/ftp/ccache/ccache-2.4.tar.gz (http://samba.org/ftp/ccache/ccache-2.4.tar.gz)

I want to rewrite it.

How can I do it? I don't find the cmd "wget http:// cache.samba.org/ftp/ccache/ccache-2.4.tar.gz" in your build file.
Altera_Forum
Honored Contributor
20 years ago
I have alreay install nios2 toolchain use build0320.and it work fine.

I finded a small question. The mxapp.diff patch failed, because the diff not cp to
~/apps.but you can handwork the step later.

the other question:

I port a ncurses program to nios2 uclinux. I writed the Makefile follow ~/apps/ftpd/Makefile. Compile it successed. But the nios2 uclinux will restart
when I exec it.
Altera_Forum
Honored Contributor
20 years ago
Hi Alex,
The ccache path is correct now in build0322.zip . And it is disabled by default.
Altera_Forum
Honored Contributor
20 years ago
Hi hippo,there is a pb:

[root@nios download]# cd ~/linux-2.6.16.1
[root@nios linux-2.6.16.1]# make ARCH=nios2nommu CROSS_COMPILE=nios2-linux-uclibc- hwselect SYSPTF=std_1c20.ptf
Makefile:524: /root/linux-2.6.16.1/arch/nios2nommu/Makefile: 没有那个文件或目录
make: *** 没有规则可以创建目标“/root/linux-2.6.16.1/arch/nios2nommu/Makefile”。 停止。

[root@nios linux-2.6.x]# ls /root/linux-2.6.16.1/arch/
alpha cris i386 m68k parisc s390 sparc v850
arm frv ia64 m68knommu powerpc sh sparc64 x86_64
arm26 h8300 m32r mips ppc sh64 um xtensa

there is no "nios2nommu" in that dir
Altera_Forum
Honored Contributor
20 years ago
I meet a pb ,when patch the busybox

[root@nios busybox-1.1.0]# patch -p1 <~/download/busybox-110.diff
patching file Makefile
Hunk# 1 FAILED at 213.
1 out of 1 hunk FAILED -- saving rejects to file Makefile.rej

--- Quote Start ---
originally posted by hippo@Feb 6 2006, 09:17 AM
hi cetic,
2. missing elf2flt for busybox, download attached busybox_110.zip
add the elf2flt stuf to busybox makefile
cd ~/download unzip busybox_110.zip cd ~/buildroot/build_nios2/busybox-1.1.0 patch -p1 <~/download/busybox-110.diff rm busybox make cd ~/buildroot make

check again with flthdr.
then rebuild kernel.

or you may try post#4, to rebuild toolchain.

hippo
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--- Quote End ---

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buildroot to build toolchain on Linux

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