* [Buildroot] genimage raw partition from multiple files
@ 2017-08-02 13:55 Michał Łyszczek
2017-08-02 17:25 ` Michał Łyszczek
0 siblings, 1 reply; 5+ messages in thread
From: Michał Łyszczek @ 2017-08-02 13:55 UTC (permalink / raw)
To: buildroot
Hi,
I've been trying to figure out, how to create raw partition, without
filesystem, from 2 or more files. Here is a general idea
partition uboot {
partition-type = 0xa2
size = 1M
image spl {
image = "u-boot-spl.bin.crc"
size = 64k
offset = 0
}
image uboot-real {
image = "u-boot.bin"
offset = 256k
}
}
Note that spl is 64k big, and uboot-real must be at offset 256k. Also
this *MUST* be a partition of type 0xa2. Can such thing be done fully in
genimage without post-install script?
--
Best Regards
?yszczek Micha?
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^ permalink raw reply [flat|nested] 5+ messages in thread* [Buildroot] genimage raw partition from multiple files
2017-08-02 13:55 [Buildroot] genimage raw partition from multiple files Michał Łyszczek
@ 2017-08-02 17:25 ` Michał Łyszczek
2017-08-02 17:55 ` Thomas Petazzoni
0 siblings, 1 reply; 5+ messages in thread
From: Michał Łyszczek @ 2017-08-02 17:25 UTC (permalink / raw)
To: buildroot
W dniu 02.08.2017 o 15:55, Micha? ?yszczek pisze:
> Hi,
>
> I've been trying to figure out, how to create raw partition, without
> filesystem, from 2 or more files. Here is a general idea
>
>
> partition uboot {
> partition-type = 0xa2
> size = 1M
>
> image spl {
> image = "u-boot-spl.bin.crc"
> size = 64k
> offset = 0
> }
>
> image uboot-real {
> image = "u-boot.bin"
> offset = 256k
> }
> }
>
>
> Note that spl is 64k big, and uboot-real must be at offset 256k. Also
> this *MUST* be a partition of type 0xa2. Can such thing be done fully in
> genimage without post-install script?
>
Ok, after messing with source code a little bit a found a way to do what
I want. Let's say want to create partition of type 0xA2 for uboot. That
partition should contain spl image and full uboot. First create image of
that partition - this image will be built from "subpartitions"
image uboot.img {
hdimage {
partition-table = "no"
}
partition spl {
in-partition-table = "no"
image = "u-boot-spl.bin.crc"
offset = 0
size = 64k
}
partition uboot-full {
in-partition-table = "no"
image = "u-boot.img"
offset = 256k
}
size = 1M
}
2 things are very important here, first is "partition-table = "no"" in
hdimage, this will tell hdimage not add ANYTHING from itself, so no
partition table, no dos magic (55 aa), no mbr at all. All partitions
should also have "in-partition-table = "no"" to prevent any additional
bytes from genimage.
When image is created like that it can be normally added into partition
table
image sdcard.img {
hdimage {
}
partition uboot-env {
in-partition-table = "no"
image = "uboot-env.bin"
offset = 17408 # 512 * 34 -> just after gpt
}
partition uboot {
partition-type = 0xa2
image = "uboot.img"
}
partition rootfs {
partition-type = 0x83
image = "rootfs.ext2"
size = 500M
}
}
And that's all, image will generate as expected. This may look like
hack, but it is quite clean solution I think. We can avoid any scripts
to create such partition for bootloader, and everything is in one place.
--
Best Regards
?yszczek Micha?
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^ permalink raw reply [flat|nested] 5+ messages in thread* [Buildroot] genimage raw partition from multiple files
2017-08-02 17:25 ` Michał Łyszczek
@ 2017-08-02 17:55 ` Thomas Petazzoni
2017-08-02 18:09 ` Michał Łyszczek
0 siblings, 1 reply; 5+ messages in thread
From: Thomas Petazzoni @ 2017-08-02 17:55 UTC (permalink / raw)
To: buildroot
Hello,
On Wed, 2 Aug 2017 19:25:02 +0200, Micha? ?yszczek wrote:
> > Note that spl is 64k big, and uboot-real must be at offset 256k. Also
> > this *MUST* be a partition of type 0xa2. Can such thing be done fully in
> > genimage without post-install script?
> >
>
> Ok, after messing with source code a little bit a found a way to do what
> I want. Let's say want to create partition of type 0xA2 for uboot. That
> partition should contain spl image and full uboot. First create image of
> that partition - this image will be built from "subpartitions"
>
>
> image uboot.img {
> hdimage {
> partition-table = "no"
> }
>
> partition spl {
> in-partition-table = "no"
> image = "u-boot-spl.bin.crc"
> offset = 0
> size = 64k
> }
>
> partition uboot-full {
> in-partition-table = "no"
> image = "u-boot.img"
> offset = 256k
> }
>
> size = 1M
> }
>
> 2 things are very important here, first is "partition-table = "no"" in
> hdimage, this will tell hdimage not add ANYTHING from itself, so no
> partition table, no dos magic (55 aa), no mbr at all. All partitions
> should also have "in-partition-table = "no"" to prevent any additional
> bytes from genimage.
>
> When image is created like that it can be normally added into partition
> table
>
>
> image sdcard.img {
> hdimage {
> }
>
> partition uboot-env {
> in-partition-table = "no"
> image = "uboot-env.bin"
> offset = 17408 # 512 * 34 -> just after gpt
> }
>
> partition uboot {
> partition-type = 0xa2
> image = "uboot.img"
> }
>
> partition rootfs {
> partition-type = 0x83
> image = "rootfs.ext2"
> size = 500M
> }
> }
>
>
> And that's all, image will generate as expected. This may look like
> hack, but it is quite clean solution I think. We can avoid any scripts
> to create such partition for bootloader, and everything is in one place.
And those two snippets of genimage configuration can be in a single
genimage.cfg, and both uboot.img and then sdcard.img will be produced
by a single genimage invocation ? Or do we need a first genimage
invocation to generate uboot.img, and then a second genimage invocation
to generate sdcard.img (which requires uboot.img) ?
Thanks!
Thomas
--
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
^ permalink raw reply [flat|nested] 5+ messages in thread* [Buildroot] genimage raw partition from multiple files
2017-08-02 17:55 ` Thomas Petazzoni
@ 2017-08-02 18:09 ` Michał Łyszczek
2017-08-02 18:11 ` Thomas Petazzoni
0 siblings, 1 reply; 5+ messages in thread
From: Michał Łyszczek @ 2017-08-02 18:09 UTC (permalink / raw)
To: buildroot
W dniu 02.08.2017 o 19:55, Thomas Petazzoni pisze:
> Hello,
>
> On Wed, 2 Aug 2017 19:25:02 +0200, Micha? ?yszczek wrote:
>
>>> Note that spl is 64k big, and uboot-real must be at offset 256k. Also
>>> this *MUST* be a partition of type 0xa2. Can such thing be done fully in
>>> genimage without post-install script?
>>>
>>
>> Ok, after messing with source code a little bit a found a way to do what
>> I want. Let's say want to create partition of type 0xA2 for uboot. That
>> partition should contain spl image and full uboot. First create image of
>> that partition - this image will be built from "subpartitions"
>>
>>
>> image uboot.img {
>> hdimage {
>> partition-table = "no"
>> }
>>
>> partition spl {
>> in-partition-table = "no"
>> image = "u-boot-spl.bin.crc"
>> offset = 0
>> size = 64k
>> }
>>
>> partition uboot-full {
>> in-partition-table = "no"
>> image = "u-boot.img"
>> offset = 256k
>> }
>>
>> size = 1M
>> }
>>
>> 2 things are very important here, first is "partition-table = "no"" in
>> hdimage, this will tell hdimage not add ANYTHING from itself, so no
>> partition table, no dos magic (55 aa), no mbr at all. All partitions
>> should also have "in-partition-table = "no"" to prevent any additional
>> bytes from genimage.
>>
>> When image is created like that it can be normally added into partition
>> table
>>
>>
>> image sdcard.img {
>> hdimage {
>> }
>>
>> partition uboot-env {
>> in-partition-table = "no"
>> image = "uboot-env.bin"
>> offset = 17408 # 512 * 34 -> just after gpt
>> }
>>
>> partition uboot {
>> partition-type = 0xa2
>> image = "uboot.img"
>> }
>>
>> partition rootfs {
>> partition-type = 0x83
>> image = "rootfs.ext2"
>> size = 500M
>> }
>> }
>>
>>
>> And that's all, image will generate as expected. This may look like
>> hack, but it is quite clean solution I think. We can avoid any scripts
>> to create such partition for bootloader, and everything is in one place.
>
> And those two snippets of genimage configuration can be in a single
> genimage.cfg, and both uboot.img and then sdcard.img will be produced
> by a single genimage invocation ? Or do we need a first genimage
> invocation to generate uboot.img, and then a second genimage invocation
> to generate sdcard.img (which requires uboot.img) ?
>
> Thanks!
>
> Thomas
>
Only one invocation of genimage.sh is needed to generate working
sdcard.img. Yes! It's that simple! I attach full genimage.cfg I created
for my port for cyclone5. This genimage.cfg creates fully working
sdcard.img (including uboot.img), and only external script used is
support/script/genimage.sh -c genimage.cfg.
--
Best Regards
?yszczek Micha?
-------------- next part --------------
image boot.vfat {
vfat {
files = {
"zImage",
"socfpga_cyclone5_socrates.dtb"
}
}
size = 8M
}
image uboot.img {
hdimage {
partition-table = "no"
}
partition spl {
in-partition-table = "no"
image = "u-boot-spl.bin.crc"
offset = 0
size = 64k
}
partition uboot-full {
in-partition-table = "no"
image = "u-boot.img"
offset = 256k
}
size = 1M
}
image sdcard.img {
hdimage {
}
partition uboot-env {
in-partition-table = "no"
image = "uboot-env.bin"
offset = 17408 # 512 * 34 -> just after gpt
}
partition boot {
partition-type = 0xc
bootable = "true"
image = "boot.vfat"
}
partition uboot {
partition-type = 0xa2
image = "uboot.img"
}
partition rootfs {
partition-type = 0x83
image = "rootfs.ext2"
size = 500M
}
}
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^ permalink raw reply [flat|nested] 5+ messages in thread* [Buildroot] genimage raw partition from multiple files
2017-08-02 18:09 ` Michał Łyszczek
@ 2017-08-02 18:11 ` Thomas Petazzoni
0 siblings, 0 replies; 5+ messages in thread
From: Thomas Petazzoni @ 2017-08-02 18:11 UTC (permalink / raw)
To: buildroot
Hello,
On Wed, 2 Aug 2017 20:09:01 +0200, Micha? ?yszczek wrote:
> > And those two snippets of genimage configuration can be in a single
> > genimage.cfg, and both uboot.img and then sdcard.img will be produced
> > by a single genimage invocation ? Or do we need a first genimage
> > invocation to generate uboot.img, and then a second genimage invocation
> > to generate sdcard.img (which requires uboot.img) ?
>
> Only one invocation of genimage.sh is needed to generate working
> sdcard.img. Yes! It's that simple! I attach full genimage.cfg I created
> for my port for cyclone5. This genimage.cfg creates fully working
> sdcard.img (including uboot.img), and only external script used is
> support/script/genimage.sh -c genimage.cfg.
Excellent! So I guess you can send a new version of your patch!
Also, don't hesitate to contribute to genimage to improve its
documentation.
Best regards,
Thomas
--
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
^ permalink raw reply [flat|nested] 5+ messages in thread
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2017-08-02 13:55 [Buildroot] genimage raw partition from multiple files Michał Łyszczek
2017-08-02 17:25 ` Michał Łyszczek
2017-08-02 17:55 ` Thomas Petazzoni
2017-08-02 18:09 ` Michał Łyszczek
2017-08-02 18:11 ` Thomas Petazzoni
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