[Buildroot] u-boot .img rootfs (H Hartley Sweeten)
Sagaert Johan
sagaert.johan at skynet.be
Tue Mar 6 20:46:50 UTC 2012
-----Oorspronkelijk bericht-----
Van: buildroot-bounces at busybox.net [mailto:buildroot-bounces at busybox.net] Namens buildroot-request at busybox.net
Verzonden: dinsdag 6 maart 2012 18:28
Aan: buildroot at busybox.net
Onderwerp: buildroot Digest, Vol 69, Issue 46
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Hi
I use u-boot in 2 different ways :
I use fatload to load the kernel image from an usb-stick
The kernel then loads the rootfs from a second ext partition on the usb stick.
The other is way i use it is to load the kernel from tftp and then load rootfs over NFS
Then i prepare the flash mtd from linux and i untar a copy of the rootfs to the mtd,and copy the kernel to another mtd partition.
If thats done i setup u-boot to load kernel and rootfs from the flash.
I don't use u-boot to write the kernel and rootfs, it's all done from within the linux booted over NFS or from an usb stick.
Johan
You can reach the person managing the list at
buildroot-owner at busybox.net
When replying, please edit your Subject line so it is more specific than "Re: Contents of buildroot digest..."
Today's Topics:
1. Re: u-boot .img rootfs (H Hartley Sweeten)
2. missing reference to libm for MicroPerl (Joshua Jackson)
3. Re: u-boot .img rootfs (Thomas Petazzoni)
4. Re: [support.osuosl.org #20368] Re: Buildroot 2012.02-rc3
released (Steve Calfee)
5. [PATCH] Make libmicrohttpd version configurable
(rolandu at gmail.com)
6. Re: [PATCH] Make libmicrohttpd version configurable
(Thomas Petazzoni)
7. Re: buildroot-reg (Thomas Petazzoni)
----------------------------------------------------------------------
Message: 1
Date: Tue, 6 Mar 2012 10:48:10 -0600
From: H Hartley Sweeten <hartleys at visionengravers.com>
To: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>,
"buildroot at busybox.net" <buildroot at busybox.net>
Subject: Re: [Buildroot] u-boot .img rootfs
Message-ID:
<ADE657CA350FB648AAC2C43247A983F001F41FF55761 at AUSP01VMBX24.collaborationhost.net>
Content-Type: text/plain; charset="utf-8"
On Tuesday, March 06, 2012 3:48 AM, Thomas Petazzoni wrote:
> Le Mon, 5 Mar 2012 20:00:57 -0600, H Hartley Sweeten <hartleys at visionengravers.com> a ?crit :
>
>> I have been using Buildroot to create a rootfs.ext2.gz that works
>> great with RedBoot.
>>
>> I have a new board that uses U-Boot as the bootloader and it wants
>> some kind of .img file for the rootfs. Can this be created using
>> Buildroot? Do I need to do something after the rootfs.ext2.gz is
>> created to make the .img file?
>
> Do you have more details, because .img is very generic. Do you have a
> pointer to your specific U-Boot configuration? Can you just show why
> you think U-Boot needs such as file?
This is the first U-Boot system I have worked with so I don't have a lot of details.
I know that that this works:
SIM.ONE> tftp c0200000 uImage
TFTP from server 192.168.0.84; our IP address is 192.168.0.79 Filename 'uImage'.
Load address: 0xc0200000
Loading: #################################################################
#################################################################
#################################################################
#################################################################
#################################################################
###################################################
done
Bytes transferred = 1923792 (1d5ad0 hex) SIM.ONE> iminfo
## Checking Image at c0200000 ...
Image Name: Linux-3.2.5
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 1923728 Bytes = 1.8 MB
Load Address: c0008000
Entry Point: c0008000
Verifying Checksum ... OK
But, when I try the ramdisk.gz file (rootfs.ext2.gz) I get this:
SIM.ONE> tftp c8000000 ramdisk.gz
TFTP from server 192.168.0.84; our IP address is 192.168.0.79 Filename 'ramdisk.gz'.
Load address: 0xc8000000
Loading: #################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#####################################################
done
Bytes transferred = 2266236 (22947c hex) SIM.ONE> iminfo
## Checking Image at c8000000 ...
Bad Magic Number
The only things I have found about the U-Boot image file mentions using 'mkimage' to create the file using a command like these
examples:
mkimage -T ramdisk -C gzip -n 'Test Ramdisk Image' -d ramdisk.img.gz uRamdisk mkimage -A sh -O linux -T ramdisk -a 0x8C800000 -n
"ST40 Linux ramdisk" -d initrd.img /export/ramdisk.ub
My guess the uRamdisk file is the same format as the uImage file used for the kernel. But, I'm not sure what the format of the
ramdisk.img.gz or initrd.img files are.
I do see there is a uboot-mkimage package available in Debian. It says this about it:
---
This package contains the mkimage utility, which encapsulates a compressed "uImage"
Linux kerel image with header information, CRC32 checksum, etc, for use with the U-Boot bootloader.
mkimage can also be used to create ramdisk images for use with U-Boot, either separated from the Linux kernel image, or combined
into one file. mkimage encapsulates the images with a 64 byte header containing information about target architecture, operating
system, image type, compression method, entry points, time stamp, CRC32 checksums, etc.
---
Regards,
Hartley
------------------------------
Message: 2
Date: Tue, 6 Mar 2012 11:46:06 -0500
From: Joshua Jackson <jjackson at vortech.net>
To: buildroot at busybox.net
Subject: [Buildroot] missing reference to libm for MicroPerl
Message-ID:
<CADxd2g8k8X=xNBWdE=dSbCUnkupecS1LdDZwiVYKiYTry1Uo4A at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
I am currently running into an issue with the compilation of MicroPerl fails with a missing libm reference. I found the following
patch that was date from a couple years ago:
This fixes builds on my system, but I'm not sure what else it might break.
Is there another fix / setting I might be missing to prevent the need for this patch?
I am using a CentOS 6 x86_64 host and am compiling for a i586 x86_32 target.
Thanks,
Josh
Patch against 2012.2 follows:
diff -uNr a/package/microperl/microperl.mk b/package/microperl/microperl.mk
--- a/package/microperl/microperl.mk 2012-02-29 17:19:47.000000000 -0500
+++ b/package/microperl/microperl.mk 2012-03-01 17:16:01.000000000 -0500
@@ -40,6 +40,7 @@
$(SED) 's/^.*<command-line>.*//g' $(MICROPERL_DIR)/Makefile
$(SED) 's/^.*<command-line>.*//g' $(MICROPERL_DIR)/x2p/Makefile
$(SED) 's/^.*<command-line>.*//g' $(MICROPERL_DIR)/makefile
+ $(SED) 's/^libs =/libs = -lm/g' $(MICROPERL_DIR)/makefile
$(SED) 's/^.*<command-line>.*//g' $(MICROPERL_DIR)/x2p/makefile
touch $@
------------------------------
Message: 3
Date: Tue, 6 Mar 2012 17:59:40 +0100
From: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
To: H Hartley Sweeten <hartleys at visionengravers.com>
Cc: "buildroot at busybox.net" <buildroot at busybox.net>
Subject: Re: [Buildroot] u-boot .img rootfs
Message-ID: <20120306175940.19e6f808 at skate>
Content-Type: text/plain; charset=UTF-8
Le Tue, 6 Mar 2012 10:48:10 -0600,
H Hartley Sweeten <hartleys at visionengravers.com> a ?crit :
> The only things I have found about the U-Boot image file mentions
> using 'mkimage' to create the file using a command like these
> examples:
>
> mkimage -T ramdisk -C gzip -n 'Test Ramdisk Image' -d ramdisk.img.gz
> uRamdisk mkimage -A sh -O linux -T ramdisk -a 0x8C800000 -n "ST40
> Linux ramdisk" -d initrd.img /export/ramdisk.ub
>
> My guess the uRamdisk file is the same format as the uImage file used
> for the kernel. But, I'm not sure what the format of the
> ramdisk.img.gz or initrd.img files are.
Yes, you have to pass the ext2.gz file through mkimage before giving it to U-Boot, in order to generate a ramdisk image that U-Boot
can understand and load into memory.
However, this way of doing ramdisks is more or less deprecated, initramfs have been the norm since quite some years now.
Best regards,
Thomas
--
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux development, consulting, training and support.
http://free-electrons.com
------------------------------
Message: 4
Date: Tue, 06 Mar 2012 09:16:25 -0800
From: Steve Calfee <stevecalfee at gmail.com>
To: support at osuosl.org
Cc: buildroot at busybox.net, jacmet at sunsite.dk
Subject: Re: [Buildroot] [support.osuosl.org #20368] Re: Buildroot
2012.02-rc3 released
Message-ID: <4F564669.1050009 at gmail.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
On 03/05/2012 02:55 PM, Rudy Grigar via RT wrote:
> On Sun Mar 04 17:04:47 2012, jacmet at sunsite.dk wrote:
>>>>>>> "Steve" == Steve Calfee<stevecalfee at gmail.com> writes:
>> Hi,
>>
>> Some buildroot users (Steve is one of them) are still experiencing DNS
>> related issues after the uclibc.org DNS move (*.buildroot.net are CNAMEs
>> to buildroot.uclibc.org). The fixes of last week unfortunately didn't
>> seem to solved the problem, could you take a look again?
>>
>> Thanks.
>>
>> Steve> Hi all,
>> Steve> Something is seriously messed up with DNS. After the osuosl guys
>> Steve> "fixed" it, I can no longer access wget
>> Steve> 'http://git.buildroot.net/buildroot/plain/CHANGES?id=2012.02_rc3' at
>> Steve> work, which was working, briefly before that.
>>
>> Steve> So now I cannot access git.buildroot.net from 3 separate isps. All
>> Steve> three local networks are NATed, two have a wireless router as the
>> Steve> gateway. I don't think this is a rare configuration. I have not had
>> Steve> this problem accessing any http server or of several git servers.
>>
>> Steve> It would really be nice to git fetch the latest release!
>>
>> Steve> Regards, Steve
>>
>
> I have noticed on certain clients that cname->cname records caused weird results. I moved
> buildroot.uclibc.org to an A record to prevent the cname->cname:
>
> git.buildroot.net is an alias for buildroot.uclibc.org.
> buildroot.uclibc.org has address 140.211.167.224
>
> Let me know if this fixes the dns issues (note: the ttl is 24 hours).
>
> Thanks,
> Rudy
For everyone's info, I waited 24 hours and can now successfully connect
to the link above and git fetch again! So whatever osuosl did this time
seems to work. I have tried on two isp networks, both att uverse and a
work isp successfully.
Regards, Steve
------------------------------
Message: 5
Date: Tue, 6 Mar 2012 19:18:48 +0200
From: rolandu at gmail.com
To: buildroot at uclibc.org
Subject: [Buildroot] [PATCH] Make libmicrohttpd version configurable
Message-ID: <1331054328-6564-1-git-send-email-rolandu at gmail.com>
From: Roland Uuesoo <roland at martem.eu>
Signed-off-by: Roland Uuesoo <roland at martem.eu>
---
package/libmicrohttpd/Config.in | 7 +++++++
package/libmicrohttpd/libmicrohttpd.mk | 2 +-
2 files changed, 8 insertions(+), 1 deletions(-)
diff --git a/package/libmicrohttpd/Config.in b/package/libmicrohttpd/Config.in
index cfedc8f..96cd408 100644
--- a/package/libmicrohttpd/Config.in
+++ b/package/libmicrohttpd/Config.in
@@ -6,6 +6,13 @@ config BR2_PACKAGE_LIBMICROHTTPD
http://www.gnu.org/software/libmicrohttpd/
+config BR2_PACKAGE_LIBMICROHTTPD_VERSION
+ string "libmicrohttpd version"
+ depends on BR2_PACKAGE_LIBMICROHTTPD
+ default 0.4.6
+ help
+ Specify libmicrohttpd version
+
config BR2_PACKAGE_LIBMICROHTTPD_SSL
bool "https support"
depends on BR2_PACKAGE_LIBMICROHTTPD
diff --git a/package/libmicrohttpd/libmicrohttpd.mk b/package/libmicrohttpd/libmicrohttpd.mk
index ff2b55d..739d779 100644
--- a/package/libmicrohttpd/libmicrohttpd.mk
+++ b/package/libmicrohttpd/libmicrohttpd.mk
@@ -3,7 +3,7 @@
# libmicrohttpd
#
#############################################################
-LIBMICROHTTPD_VERSION = 0.4.6
+LIBMICROHTTPD_VERSION = $(BR2_PACKAGE_LIBMICROHTTPD_VERSION)
LIBMICROHTTPD_SOURCE = libmicrohttpd-$(LIBMICROHTTPD_VERSION).tar.gz
LIBMICROHTTPD_SITE = $(BR2_GNU_MIRROR)/libmicrohttpd
LIBMICROHTTPD_INSTALL_STAGING = YES
--
1.7.5.4
------------------------------
Message: 6
Date: Tue, 6 Mar 2012 18:20:46 +0100
From: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
To: buildroot at busybox.net
Subject: Re: [Buildroot] [PATCH] Make libmicrohttpd version
configurable
Message-ID: <20120306182046.56f21098 at skate>
Content-Type: text/plain; charset=UTF-8
Le Tue, 6 Mar 2012 19:18:48 +0200,
rolandu at gmail.com a ?crit :
> From: Roland Uuesoo <roland at martem.eu>
Except for some particular packages such as U-Boot or the kernel, which
are highly hardware-dependent, we generally don't like having multiple
version support for userspace libraries/applications.
Could you give us details as to why this would be needed specifically
for libmicrohttpd?
Thanks,
Thomas
--
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
------------------------------
Message: 7
Date: Tue, 6 Mar 2012 18:27:36 +0100
From: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
To: saketha rama <ramasaketha at gmail.com>
Cc: buildroot at uclibc.org
Subject: Re: [Buildroot] buildroot-reg
Message-ID: <20120306182736.5f41bcc9 at skate>
Content-Type: text/plain; charset=UTF-8
Hello,
For community support to Buildroot, I'd prefer if you asked the
Buildroot mailing list instead. Since your e-mail does not contain any
confidential information specific to your project, I took the freedom
of directly copying the Buildroot list for this reply. Please keep the
list in Cc for this discussion.
Le Tue, 6 Mar 2012 22:49:06 +0530,
saketha rama <ramasaketha at gmail.com> a ?crit :
> I just found your PPT titled "Using buildroot for real
> projects" .
Good. Just a detail: this document is not a PPT. PPT is a proprietary
file format that works only with the Microsoft Powerpoint proprietary
software, which I don't use. The document "Using Buildroot for real
projects" that you have found is a PDF generated with LaTeX.
> I have a great difficulty creating my customised rootfs
> for beaglebone embedded system using buildroot. It is said in your
> ppt that the buildroot/fs/skeleton will decide the rootfs structure,
> but after I change the skeleton also nothing is changed in my rootfs.
The skeleton is copied into the target directory (which will become the
contents of your root filesystem) at the *beginning* of the Buildroot
build process. Therefore, if you make changes to the skeleton, you must
do a "make clean; make" invocation to force Buildroot to restart the
build from scratch.
Of course, since this is practical at all, I do not recommend using the
skeleton mechanism to customize the root filesystem contents. I rather
recommend:
*) Creating Buildroot packages if what you need to add to the root
filesystem are additional libraries or applications ;
*) Use the post-build script mechanism to add configuration files or
scripts to the root filesystem. Since this post-build script is
executed at the end of *every* build, it doesn't carry the same
problem as the "customize skeleton" solution.
See slides 23 and 24 of the presentation "Using Buildroot for real
projects".
Do not hesitate to get back to us if you need more details about those
mechanisms,
Best regards,
Thomas Petazzoni
--
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
------------------------------
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