Hi Bhupesh,
Yes, if you are using ARM DS-5, this is the wikipage to look at to setup
your environment to debug UEFI. Let me know if you have issue.
Regards,
Olivier
> -----Original Message-----
> From: Sharma Bhupesh-B45370 [mailto:B45370@freescale.com]
> Sent: 22 October 2013 07:56
> To: 'Andrew Fish'; 'edk2-devel(a)lists.sourceforge.net'
> Cc: 'Kim Phillips'; 'boot-architecture(a)lists.linaro.org'; Kushwaha
> Prabhakar-B32579
> Subject: Re: [edk2] Debugging Sec and PI phases {Source symbols}
>
>
> > -----Original Message-----
> > From: boot-architecture-bounces(a)lists.linaro.org [mailto:boot-
> > architecture-bounces(a)lists.linaro.org] On Behalf Of Andrew Fish
> > Sent: Tuesday, October 22, 2013 2:07 AM
> > To: edk2-devel(a)lists.sourceforge.net
> > Cc: 'Kim Phillips'; 'boot-architecture(a)lists.linaro.org'; Kushwaha
> > Prabhakar-B32579
> > Subject: Re: [edk2] Debugging Sec and PI phases {Source symbols}
> >
> >
> >
> > On Oct 21, 2013, at 11:38 AM, Sharma Bhupesh-B45370
> > <B45370(a)freescale.com> wrote:
> >
> > > [Resending as I got a 'You must be subscribed to post messages to
> this
> > > mailing list' message from edk2 list]
> > >
> > > Hi List,
> > >
> > > I am new to UEFI and am trying to debug my UEFI ported code (from
> u-
> > boot) on a ARMv7 based SoC.
> > > I am able to do some basic debugging of the ARM CPU init code using
> a
> > DS-5 debugger attached to the board.
> > >
> > > I see that the ported code crashes somewhere while making a
> transition
> > from Sec to PI phase.
> > > However, I can only verify this by seeing instruction level
> > > disassembly. I cannot figure out a way to load the source code
> using
> > the DS-5 debugger.
> > >
> > > I am used to seeing ELF files which have the debug information and
> > which can be loaded via the debugger.
> > > Using the 'file' command I cannot find any ELF file in the output
> > > directory 'Build/..'. The FV and FD files don't seem to be ELF
> files as
> > well.
> > >
> >
> > FD is short for Flash Device. So it is usually the layout of the ROM.
> You
> > could have multiple ROMs, but the most common thing is to just have a
> > single FD.
> > FV is a Firmware Volume. Basically a simple Flash Filesystem that
> allows
> > files, named by GUIDs to be discovered.
> >
> > EFI is a collection of relocatable PE/COFF images, and in general an
> INF
> > file (no for a library) in your project maps to a PE/COFF file
> getting
> > generated.
> >
> > It can vary by compiler, but it is common for the *.dll file to be
> the
> > native image with the debug info. So that is the file you want to
> load
> > symbols for.
> >
> > There are various schemes on how to do this. Some platforms print out
> > debug messages that map into the commands you need to load symbols.
> Some
> > platforms have scripts that can load symbols.
> >
> > Sorry I don't remember the latest recommendation on which scheme to
> use
> > for your platform? Try looking at the *.Fv.map file as I think it has
> > info about how to load symbols. You would need a script to convert
> this
> > into some format the DS-5 understands.
> >
> > Maybe the scripts in
> >
> https://svn.code.sf.net/p/edk2/code/trunk/edk2/ArmPlatformPkg/Scripts/D
> s5
> > / are what you are looking for?
>
> Many thanks Andrew. It seems the DS5 scripts will work for me. I found
> the wiki
> for the same here:
> http://sourceforge.net/apps/mediawiki/tianocore/index.php?title=ArmPkg/
> Ds5
>
> I will try to debug the target using these scripts and get back with my
> results.
>
> Regards,
> Bhupesh
>
> > Thanks,
> >
> > Andrew Fish
> >
> > > Any pointers to which ELF file is generated while compiling a UEFI
> > > BoardPkg and how it can be loaded via the debugger.
> > >
> > > Thanks for your help.
> > > Regards,
> > > Bhupesh
> > >
> > >
> > > -------------------------------------------------------------------
> ---
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> > > and register >
> > >
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> > > lktrk _______________________________________________
> > > edk2-devel mailing list
> > > edk2-devel(a)lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/edk2-devel
> >
> >
> > _______________________________________________
> > boot-architecture mailing list
> > boot-architecture(a)lists.linaro.org
> > http://lists.linaro.org/mailman/listinfo/boot-architecture
>
>
>
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On Oct 21, 2013, at 11:38 AM, Sharma Bhupesh-B45370 <B45370(a)freescale.com> wrote:
> [Resending as I got a 'You must be subscribed to post messages to this mailing list' message from edk2 list]
>
> Hi List,
>
> I am new to UEFI and am trying to debug my UEFI ported code (from u-boot) on a ARMv7 based SoC.
> I am able to do some basic debugging of the ARM CPU init code using a DS-5 debugger attached to the board.
>
> I see that the ported code crashes somewhere while making a transition from Sec to PI phase.
> However, I can only verify this by seeing instruction level disassembly. I cannot figure out a way to load
> the source code using the DS-5 debugger.
>
> I am used to seeing ELF files which have the debug information and which can be loaded via the debugger.
> Using the 'file' command I cannot find any ELF file in the output directory 'Build/..'. The FV and FD
> files don't seem to be ELF files as well.
>
FD is short for Flash Device. So it is usually the layout of the ROM. You could have multiple ROMs, but the most common thing is to just have a single FD.
FV is a Firmware Volume. Basically a simple Flash Filesystem that allows files, named by GUIDs to be discovered.
EFI is a collection of relocatable PE/COFF images, and in general an INF file (no for a library) in your project maps to a PE/COFF file getting generated.
It can vary by compiler, but it is common for the *.dll file to be the native image with the debug info. So that is the file you want to load symbols for.
There are various schemes on how to do this. Some platforms print out debug messages that map into the commands you need to load symbols. Some platforms have scripts that can load symbols.
Sorry I don't remember the latest recommendation on which scheme to use for your platform? Try looking at the *.Fv.map file as I think it has info about how to load symbols. You would need a script to convert this into some format the DS-5 understands.
Maybe the scripts in https://svn.code.sf.net/p/edk2/code/trunk/edk2/ArmPlatformPkg/Scripts/Ds5/ are what you are looking for?
Thanks,
Andrew Fish
> Any pointers to which ELF file is generated while compiling a UEFI BoardPkg and how it can be loaded
> via the debugger.
>
> Thanks for your help.
> Regards,
> Bhupesh
>
>
> ------------------------------------------------------------------------------
> October Webinars: Code for Performance
> Free Intel webinars can help you accelerate application performance.
> Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from
> the latest Intel processors and coprocessors. See abstracts and register >
> http://pubads.g.doubleclick.net/gampad/clk?id=60135991&iu=/4140/ostg.clktrk
> _______________________________________________
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> https://lists.sourceforge.net/lists/listinfo/edk2-devel
Hi Steven,
Please find attached two patches used for aarch64 work. Each patch goes
into a different topic branch in the end, not in the linaro-topic-fvp
branch as we discussed earlier. Still, they are quite simple, so shouldn't
cause much of a problem.
0001-tools_def-AARCH64-use-CROSS_COMPILE-variable.patch
The above patch goes into linaro-topic-misc.
0002-FVP-Add-support-for-EDK2_USE_ANDROID_CONFIG-build-pa.patch
The above patch goes into linaro-topic-fvp.
Please let me know if these cause you any problems, but it would be good to
get them into uefi.git for the -rc4 and the -03 release respin.
You can also pull both patches/branches from my tree:
https://git.linaro.org/gitweb?p=people/ryanharkin/uefi-next.git;a=summary
Thanks,
Ryan.
On Mon, Sep 30, 2013 at 10:28:49PM +0100, Grant Likely wrote:
> > > load image protocol. In that case the sub should override the setting in
> the
> > > FDT if the initrd argument is present.
> >
> > Hmm, well, it's slightly worse than that - it will have one; only it
> > will be GRUB's command line.
> >
> > The way that can be resolved is:
> > - FDT present?
> > - Commandline present in FDT chosen node?
> > - Yes
> > - Use that.
> > - No
> > - EFI_LOADED_IMAGE command line present?
> > - Yes
> > - Use that.
> > - No
> > - Fail miserably.
> That doesn't handle the case where firmware provides the fdt, but the kernel is
> loaded via the UEFI shell or gummiboot. In that case the stub must process both
> the loaded image arguments.
Well, unless the firmware-provided device tree contains a kernel
command line, that should work fine?
If you mean that there are two command lines to parse for the
EFI_LOADED_IMAGE (one for shell/gummiboot), surely there is a handle
in there to identify the "current" one.
/
Leif
On Mon, Sep 30, 2013 at 09:05:04PM +0100, Grant Likely wrote:
> > Handling the 2 cases is not a problem. I just don't want to handle
> > 'mixed' cases where
> > a command line and an FDT are passed to the stub, and information from
> > both is used.
> >
> > As I understand it, the two cases are:
> >
> > FDT_GUID present == GRUB case
> > * GRUB loads initrd if present
> > * GRUB provides complete FDT to stub (includes command line, hardware
> > description, initrd entry, etc.)
> > * EFI stub loads FDT using FDT_GUID, adds memory map and system table
> > pointer to FDT, starts kernel.
> > * (any command line present in EFI_LOADED_IMAGE is ignored.)
> >
> > FDT_GUID absent == current case
> > * stub loads FDT and initrd from system partition
> > * stub adds command line from EFI_LOADED_IMAGE to FDT
> > * stub adds initrd entry to FDT
> > * stub adds memory map and system table pointer to FDT, starts kernel.
> >
> > In the case of UEFI owning the FDT, and providing it to the stub,
> > where does the initrd come from? I think this adds
> > another case to handle...
> The stub will still need to process a command line if it is given one via the
> load image protocol. In that case the sub should override the setting in the
> FDT if the initrd argument is present.
Hmm, well, it's slightly worse than that - it will have one; only it
will be GRUB's command line.
The way that can be resolved is:
- FDT present?
- Commandline present in FDT chosen node?
- Yes
- Use that.
- No
- EFI_LOADED_IMAGE command line present?
- Yes
- Use that.
- No
- Fail miserably.
/
Leif
On Mon, Sep 30, 2013 at 11:27 AM, Grant Likely <grant.likely(a)linaro.org> wrote:
> On Mon, Sep 30, 2013 at 5:46 PM, Leif Lindholm <leif.lindholm(a)linaro.org> wrote:
>> On Mon, Sep 30, 2013 at 08:05:59AM -0700, Roy Franz wrote:
>>> > I was thinking that the stub would want to use the FDT passed by grub
>>> > if one is passed, but I hadn't thought about the case where grub wants
>>> > to pass information to the stub, but the stub still loads the FDT. The
>>> > easiest thing would be to straight out say that if GRUB is loading the
>>> > initrd, then it is mandatory for GRUB to also load the FDT. That
>>> > eliminates the corner case and I can't think of any situation where
>>> > we'd want GRUB loading the initrd, but use the stub to load the FDT.
>>>
>>> I'd also like to avoid having the stub merge FDT contents from different trees.
>>>
>>> If we add this table, then it seems this would be the right way to
>>> handle passing
>>> the FDT to the EFI stub, even without GRUB involved. Is there a reason not to
>>> move to this method in general?
>>
>> Not really.
>> So ... I guess that would modify the stub behaviour to:
>> - Look for an FDT_GUID configuration table.
>> - If there, use it.
>> - If not there, require one to be loaded based on command line.
>
> Create a mostly empty one for passing freeform data to the kernel
> proper; this is what it will look like on ACPI systems.
So for ACPI systems the stub will package the ACPI data into the FDT?
What would the stub be putting into the FDT that an ACPI/UEFI aware kernel
couldn't get itself at runtime from UEFI?
>
>> And the GRUB behaviour to:
>> - If no FDT_GUID, require FDT if initrd.
>> - If FDT_GUID, copy FDT + add initrd information.
>>
>> The x86 code uses bootparam to pass the kernel command line.
>> Could we use the FDT exists) for the kernel command line
>> too? This would make more code shared between x86 and ARM*, since
>> otherwise we would need to explicitly implement (UCS?) command line
>> passing to stub?
>
> Yes, I think that makes sense. That also means GRUB will need to
> always create an FDT, even if it is empty.
I'm not following something here - why would GRUB create an empty FDT?
Is GRUB going to be responsible for the complete FDT, or just passing the
initrd and/or command line in an FDT?
>
> The other option would be to pass the command line via the LoadOptions
> from the EFI_LOADED_IMAGE protocol. I believe that is what Roy's
> patches currently rely on for getting a command line.
Yes, both my implementation and the x86 implementation get the command line
from the EFI_LOADED_IMAGE protocol, and do conversion from UCS-2 (I think)
to ASCII/UTF-8 to pass to the kernel. The format of the command line does not
seem to be specified by UEFI.
>
> g.
On Mon, Sep 30, 2013 at 07:27:58PM +0100, Grant Likely wrote:
> > So ... I guess that would modify the stub behaviour to:
> > - Look for an FDT_GUID configuration table.
> > - If there, use it.
> > - If not there, require one to be loaded based on command line.
>
> Create a mostly empty one for passing freeform data to the kernel
> proper; this is what it will look like on ACPI systems.
OK. So we push the actual error condition of missing tree down to stub?
Makes sense.
> > The x86 code uses bootparam to pass the kernel command line.
> > Could we use the FDT exists) for the kernel command line
> > too? This would make more code shared between x86 and ARM*, since
> > otherwise we would need to explicitly implement (UCS?) command line
> > passing to stub?
>
> Yes, I think that makes sense. That also means GRUB will need to
> always create an FDT, even if it is empty.
Yes. This would be my preference.
> The other option would be to pass the command line via the LoadOptions
> from the EFI_LOADED_IMAGE protocol. I believe that is what Roy's
> patches currently rely on for getting a command line.
Since the current code doesn't UEFI-wise "load" the stub image, we'd
effectively need to reverse-reconstruct GRUB's runtime environment,
which I really wouldn't like.
/
Leif
On Mon, Sep 30, 2013 at 7:51 AM, Grant Likely <grant.likely(a)linaro.org> wrote:
> On Mon, Sep 30, 2013 at 2:59 PM, Leif Lindholm <leif.lindholm(a)linaro.org> wrote:
>> Hi guys,
>>
>> I've been looking at the patches Matthew Garrett wrote for loading a
>> UEFI stub kernel through GRUB, and noticed one thing that may require
>> updates to the stub code: it uses GRUB to load the initrd.
>> Doing this of course means the initrd does not need to go into the EFI
>> System Partition, which is a lot nicer from the distros' position.
>>
>> Now, in x86 land GRUB just passes the stub a bootparam structure, and
>> I assume it just keeps filling the same structure in before passing it
>> on to the kernel .
>>
>> On ARM*, we would need to get this information over "some other way",
>> where the obvious candidate would be FDT.
>>
>> GRUB could register an empty devicetree, with only the initrd
>> information in it, as a UEFI configuration table. (Getting a UUID for
>> this was discussed in New Orleans.)
>
> Right. It would be a trivial feature to have a UUID in the system
> table pointing to an allocated block of memory containing an FDT. It
> would also be nice to give the FDT some extra space when loaded so
> that the libfdt functions can work in-place... but I digress; the flat
> tree structure already contains enough information to do that.
>
>> Or, on systems using FDT for hardware description, once firmware
>> becomes mature enough to do this themselves - add this information to
>> the system-provided one.
>>
>> The stub would then need to look for this devicetree, and if present,
>> copy the initrd nodes across into the one it loads itself.
>
> I was thinking that the stub would want to use the FDT passed by grub
> if one is passed, but I hadn't thought about the case where grub wants
> to pass information to the stub, but the stub still loads the FDT. The
> easiest thing would be to straight out say that if GRUB is loading the
> initrd, then it is mandatory for GRUB to also load the FDT. That
> eliminates the corner case and I can't think of any situation where
> we'd want GRUB loading the initrd, but use the stub to load the FDT.
I'd also like to avoid having the stub merge FDT contents from different trees.
If we add this table, then it seems this would be the right way to
handle passing
the FDT to the EFI stub, even without GRUB involved. Is there a reason not to
move to this method in general?
>
>> Alternatively, we could define a special protocol for passing
>> additional parameters to the stubbed kernel ... or a special protocol
>> to pass a special FDT but I'm not sure we want yet another interface.
>
> Indeed. I definitely don't want to do this.
Agreed...
>
> g.
Hi guys,
I've been looking at the patches Matthew Garrett wrote for loading a
UEFI stub kernel through GRUB, and noticed one thing that may require
updates to the stub code: it uses GRUB to load the initrd.
Doing this of course means the initrd does not need to go into the EFI
System Partition, which is a lot nicer from the distros' position.
Now, in x86 land GRUB just passes the stub a bootparam structure, and
I assume it just keeps filling the same structure in before passing it
on to the kernel .
On ARM*, we would need to get this information over "some other way",
where the obvious candidate would be FDT.
GRUB could register an empty devicetree, with only the initrd
information in it, as a UEFI configuration table. (Getting a UUID for
this was discussed in New Orleans.)
Or, on systems using FDT for hardware description, once firmware
becomes mature enough to do this themselves - add this information to
the system-provided one.
The stub would then need to look for this devicetree, and if present,
copy the initrd nodes across into the one it loads itself.
Alternatively, we could define a special protocol for passing
additional parameters to the stubbed kernel ... or a special protocol
to pass a special FDT but I'm not sure we want yet another interface.
Thoughts?
/
Leif
Hi all,
The uefi-next.git tree [1] has been updated for the 13.09 cycle.
We're at -rc1, but the code freeze is today, so probably not enough time
for any changes before the release.
Snapshot binaries are available now [2]
What's included?
Well, not as much as I hoped because I've run out of time. So no ethernet
and no SMBIOS patches just yet.
Current topic branches:
linaro-topic-a5
linaro-topic-a9
linaro-topic-arndale
linaro-topic-bds
linaro-topic-fvp
linaro-topic-misc
linaro-topic-origen
linaro-topic-panda
linaro-topic-tc1
linaro-topic-tc2
As always, you should probably pull and build the "linaro-tracking" branch,
not one of the topic branches.
The main addition for this release is the (now) upstream aarch64 support.
The uefi_rtsm-ve-aemv8.bin snapshot binary will boot on the Aarch64 VE
model that is currently available to Linaro internal people from the usual
place [4]
I've tested A9, TC2, FVP on the snapshot binaries. I tested RTSMs, aarch64
VE model and Arndale on my own build of the code and Dave Long has tested
Panda on his own build of the same code.
One problem I note for aarch64 is that we don't have a similar fix to this
for native building:
4511a19 2012-12-12 BaseTools: allow native building [Leif Lindholm]
Probably not a big issue, who would want to compile aarch64 inside a model??
Regards,
Ryan.
[1] https://git.linaro.org/gitweb?p=arm/uefi/uefi-next.git;a=summary
[2] https://snapshots.linaro.org/components/kernel/uefi-next/152
[3]
https://snapshots.linaro.org/components/kernel/uefi-next/152/uefi_rtsm-ve-a…
[4] https://collaborate.linaro.org/display/ITS/FlexLM+and+Fast+Models
Hi,
I have checked out to the 2012.09.1 branch of the
u-boot-linaro-stable source and built the u-boot for panda. It worked
fine. Then I enabled the Debug prints and again built the u-boot. But
this time the u-boot hanged up in the middle. In my observations, it
hanged up at the end of the board_init_f() function in the
arch/arm/lib/board.c. At the end it has the relocate_code() function
that might cause the problem. Im stuck up with this and any help would
be appreciated.
Thanks,
Davidson. K
Hi,
a normal Linux kernel currently supports reading the start and end
address of a single binary blob via the FDT's /chosen node.
This will be interpreted as the location of an initial RAM disk.
The Xen hypervisor itself is a kernel, but needs up to _two_ binaries
for proper operation: a Dom0 Linux kernel and it's associated initrd.
On x86 this is solved via the multiboot protocol used by the Grub
bootloader, which supports to pass an arbitrary number of binary modules
to any kernel.
Since in the ARM world we have the versatile device tree, we don't need
to implement the mulitboot protocol.
So I'd like to propose a new binding which denotes binary modules a
kernel can use at it's own discretion.
The need is triggered by the Xen hypervisor (which already uses a very
similar scheme), but the approach is deliberately chosen to be as
generic as possible to allow future uses (like passing firmware blobs
for devices or the like).
Credits for this go to Ian Campbell, who started something very similar
[1] for the Xen hypervisor. The intention of this proposal is to make
this generic and publicly documented.
Looking forward to any comments!
Thanks,
Andre.
[1]
http://xenbits.xen.org/gitweb/?p=xen.git;a=blob;f=docs/misc/arm/device-tree…
----------------------------
* Multiple boot modules device tree bindings
Boot loaders wanting to pass multiple additional binaries to a kernel
shall add a node "module" for each binary blob under the /chosen node
with the following properties:
- compatible:
compatible = "boot,module";
A bootloader may add names to more specifically describe the module,
e.g. Xen may use "xen,dom0-kernel" or "xen,dom0-ramdisk".
If possible a kernel should be able to use modules even without a
descriptive naming, by enumerating them in order and using hard-coded
meanings for each module (e.g. first is kernel, second is initrd).
- reg: specifies the base physical address and size of a region in
memory where the bootloader loaded the respective binary data to.
- bootargs:
An optional property describing arguments to use for this module.
Could be a command line or configuration data.
Example:
/chosen {
#size-cells = <0x1>;
#address-cells = <0x1>;
module@0 {
compatible = "xen,linux-zimage", "xen,multiboot-module",
"boot,module";
reg = <0x80000000 0x003dcff8>;
bootargs = "console=hvc0 earlyprintk ro root=/dev/sda1 nosmp";
};
module@1 {
compatible = "xen,linux-initrd", "xen,multiboot-module",
"boot,module";
reg = <0x08000000 0x00123456>;
};
...
Adding Dennis for a distro perspective.
On Wed, Sep 4, 2013 at 3:44 AM, Ian Campbell <Ian.Campbell(a)citrix.com> wrote:
> On Tue, 2013-09-03 at 17:00 -0500, Rob Herring wrote:
>> On Tue, Sep 3, 2013 at 10:53 AM, Andre Przywara
>> <andre.przywara(a)linaro.org> wrote:
>> > Hi,
>> >
>> > a normal Linux kernel currently supports reading the start and end address
>> > of a single binary blob via the FDT's /chosen node.
>> > This will be interpreted as the location of an initial RAM disk.
>> >
>> > The Xen hypervisor itself is a kernel, but needs up to _two_ binaries for
>> > proper operation: a Dom0 Linux kernel and it's associated initrd.
>> > On x86 this is solved via the multiboot protocol used by the Grub
>> > bootloader, which supports to pass an arbitrary number of binary modules to
>> > any kernel.
>> >
>> > Since in the ARM world we have the versatile device tree, we don't need to
>> > implement the mulitboot protocol.
>>
>> But surely there would be some advantage of reuse by using the
>> multi-boot protocol since Xen, grub, and OS tools already support it
>> for x86.
>
> Multiboot is pretty x86 specific (although MB2 has a MIPS port) and
> covers more stuff than we strictly require (e.g. on x86 it has
> requirements around which processor mode you enter in, has paging
> enabled etc).
>
>> > So I'd like to propose a new binding which denotes binary modules a kernel
>> > can use at it's own discretion.
>> > The need is triggered by the Xen hypervisor (which already uses a very
>> > similar scheme), but the approach is deliberately chosen to be as generic as
>> > possible to allow future uses (like passing firmware blobs for devices or
>> > the like).
>> > Credits for this go to Ian Campbell, who started something very similar [1]
>> > for the Xen hypervisor. The intention of this proposal is to make this
>> > generic and publicly documented.
>>
>> Can you describe how you see the boot flow working starting with OS
>> installer writes kernel, initrd, xen and ??? to disk.
>
> Kernel and initrd are written to /boot in the usual way (probably from
> kernel.deb or whatever). Xen would also normally come from a distro
> package (also in /boot).
>
>> How does the bootloader know what to load?
>
> It's in the bootloader config, e.g. boot.scr or grub.cfg, which are
> either hand written or produced by the distros tooling.
>
> grub on ARM could consume the same stanzas as are used by grub on x86 to
> boot Xen (which are produced by update-grub):
> echo 'Loading Xen 4.1-amd64 ...'
> multiboot /xen-4.1-amd64.gz placeholder
> echo 'Loading Linux 3.10-2-amd64 ...'
> module /vmlinuz-3.10-2-amd64 placeholder root=/dev/mapper/disks-root ro resume=/dev/mapper/disks-swap quiet
> echo 'Loading initial ramdisk ...'
> module /initrd.img-3.10-2-amd64
>
> Since there is no multiboot on ARM (and never will be) this is safe.
>
> If multiboot ever does come to ARM it will necessarily be multiboot2
> which uses a different keyword.
Right, this is just a text file with a list of binaries. It is not
really the multiboot spec. There is no reason for this part to be
different for grub on ARM. There is a big advantage to reusing the
distro side tooling. If there isn't really much reuse on the
bootloader side, then I'm fine with a different bootloader to Xen
interface. I would like to hear that from folks working on grub
though.
> For u-boot Andre has proposed some syntactic sugar over the "fdt"
> command to make boot.scr more trivial to use. We would of course need to
> implement support for using it in the relevant distro tools (but they
> tend to be very distro/machine specific already, e.g. Debian's
> flash-kernel)
And being machine specific is a PITA. flash-kernel is certainly not
something we want to expand on. There is not much love for boot.scr
either. There is work to address what are not really machine
differences, but largely vendor u-boot differences:
http://www.mail-archive.com/u-boot@lists.denx.de/msg119025.html
One option for u-boot which already supports syslinux style menu files
is to adopt the syslinux multiboot parsing support:
http://www.syslinux.org/wiki/index.php/Doc/mboot
We need to back-up and consider what this looks like in the end for
all the pieces and get input from folks on grub, UEFI, and armv8. The
UEFI answer may be this is a grub problem. For armv8, this proposal
does match up well as the kernel boot interface for v8 is DT. Despite
some claims, ACPI will not completely replace DT because of this.
Rob
On Fri, 13 Sep 2013 12:22:13 +0100, Ian Campbell <Ian.Campbell(a)citrix.com> wrote:
> On Fri, 2013-09-13 at 11:13 +0100, Grant Likely wrote:
> > On Wed, Sep 4, 2013 at 5:41 PM, Rob Herring <robherring2(a)gmail.com> wrote:
> > >> For u-boot Andre has proposed some syntactic sugar over the "fdt"
> > >> command to make boot.scr more trivial to use. We would of course need to
> > >> implement support for using it in the relevant distro tools (but they
> > >> tend to be very distro/machine specific already, e.g. Debian's
> > >> flash-kernel)
> > >
> > > And being machine specific is a PITA. flash-kernel is certainly not
> > > something we want to expand on. There is not much love for boot.scr
> > > either. There is work to address what are not really machine
> > > differences, but largely vendor u-boot differences:
> > >
> > > http://www.mail-archive.com/u-boot@lists.denx.de/msg119025.html
> > >
> > > One option for u-boot which already supports syslinux style menu files
> > > is to adopt the syslinux multiboot parsing support:
> > >
> > > http://www.syslinux.org/wiki/index.php/Doc/mboot
> >
> > Even building it into U-Boot is problematic because it leaves older
> > machines out in the cold. Leif's port of Grub to U-Boot is far more
> > interesting since the distro can now be in control of the code that
> > loads the images and jumps into the kernel/hypervisor.
>
> AIUI this is not being developed any further?
Last I checked the patches have been posted for merging, but it is
stalled on the Grub maintainer. I believe he wanted to fix a bug on the
raspberry pi before merging. Leif would know more. LEG isn't actively
working on it anymore since UEFI is the priority, but I wouldn't call it
abandoned.
> > > We need to back-up and consider what this looks like in the end for
> > > all the pieces and get input from folks on grub, UEFI, and armv8. The
> > > UEFI answer may be this is a grub problem. For armv8, this proposal
> > > does match up well as the kernel boot interface for v8 is DT. Despite
> > > some claims, ACPI will not completely replace DT because of this.
> >
> > Yes, for UEFI it is absolutely an OS loader problem. UEFI provides an
> > API and runtime environment. Grub is in general moving towards a boot
> > menu system and a tool for loading images. Actual booting however
> > should be done by a separate OS loader application. For Linux, this
> > will be an in-kernel UEFI Stub.
>
> I'm not sure I follow your distinction between loading the images and
> "actual booting". If grub loads the images and Linux stub does the
> actual booting how does this stub locate the images which grub loaded?
(Note: this isn't implemented yet, but is in progress) The DTB will need
to be passed via the UEFI system table. Initrd is passed by modifying
the dtb with linux,initrd-* properties in the device tree.
In the Xen case, I think the original proposal is conceptually sound.
I'll quibble about a couple of the details, but I'll address those with
a reply to the original proposal. It makes perfect sense to use the same
mechanism as the initrd properties to tell the kernel about additional
blobs.
> Or are you saying the stub should load the initramfs itself? How does it
> know where to find it? Having the kernel in one config file (grub's) and
> the initramfs in another (the Linux UEFI stub's) seems likely to result
> in things getting out of sync. Having Linux's stub parse the grub CFG is
> even less likely to work well IMHO.
The stub has the ability to load both the dtb and initrd itself by
adding "dtb=" and "initrd=" arguments, but it is currently limited to
loading images from the same filesystem that the kernel was loaded from.
GRUB (or gummiboot/refind/etc) is potentially more flexible.
> > For Xen I would recommend taking the
> > Linux EFI stub code and doing the same thing. There really isn't a
> > need for a multiboot spec when you can rely on a runtime execution
> > environment for setting things up exactly as you want them.
>
> If this works for Linux on EFI then I see no reason it could work for
> Xen on EFI (assuming my questions above are just a result of my
> misunderstanding something)
>
> But... Xen also wants to support non-server and therefore non-EFI
> systems i.e. u-boot. We also want to support v7 where EFI is not a given
> even for servers AIUI.
I was only responding to the UEFI question, but that aside, I don't see
a problem with adding properties to the DT for telling Xen where they
are.
> Given that I think it is a given that Xen will have some sort of
> protocol along these lines, for use in these environments even if it
> does the EFI stub thing on EFI systems. The question is shall we make it
> more general and useful to others or just go our own way? I'd prefer to
> do the former.
Yes, make it general. GRUB and the EFI stub will use it.
g.
I discovered a link problem with uefi-next when building for panda.
Apparently a couple new functions need to be added to the
platform-specific helper code for panda. As suggested by Leif I will
reply with the patch.
-dl
Hi Vijay,
On Wed, Sep 4, 2013 at 4:58 PM, Vijay Kilari <vijay.kilari(a)gmail.com> wrote:
> Hi,
>
> I could now able to boot the kernel from MMC card with UEFI.
> However, updating TC2 from u-boot to uefi, only one core is booting up.
> Logs are below
>
> [ 70.779282] CPU0: thread -1, cpu 0, socket 1, mpidr 80000100
> [ 70.779321] Setting up static identity map for 0x804b85f0 - 0x804b8648
> [ 71.837336] CPU1: failed to boot: -38
> [ 72.841858] CPU2: failed to boot: -38
> [ 73.846383] CPU3: failed to boot: -38
> [ 74.850924] CPU4: failed to boot: -38
> [ 74.850958] Brought up 1 CPUs
>
One possible reason for this is the setting in firmware board.txt
If you disable CONFIG_MCPM in kernel, you need to disable
bit[12] of SCC: 0x700in board.txt to use the legacy/sysflag style of
booting secondary cpus.
Regards,
Sudeep
Hi Vijay,
The Linaro boot-architecture mailing list is a better forum for
questions about the Linaro UEFI releases. I have cc:d this email
to that list.
The reason you do not see TFTP boot as an option is that that is not
yet released. We are hoping to do this shortly. It would probably be
a good idea for us to mention that in the documentation.
I do not recognise the other error message.
/
Leif
On Mon, Sep 02, 2013 at 05:01:23PM +0530, Vijay Kilari wrote:
> Hi Leif Lindholm,
>
>
> I am changing to UEFI from u-boot on my TC2 board.
> I have followed the step listed under "Firmware Update" tab from below link
> http://releases.linaro.org/13.06/ubuntu/vexpress/
>
> After reboot, I see that uefi fails to load kernel image with below log
>
>
> The default boot selection will start in 1 seconds
> ERROR: Did not find Linux kernel.
> [1] Linaro image on SD card
> - VenHw(09831032-6FA3-4484-AF4F-0A000A8D3A82)/HD(1,MBR,0x00000000,0x3F,0x19FC0)/uImage
> - Initrd:
> VenHw(09831032-6FA3-4484-AF4F-0A000A8D3A82)/HD(1,MBR,0x00000000,0x3F,0x19FC0)/uInitrd
> - Arguments: console=ttyAMA0,38400n8 root=/dev/mmcblk0p2
> rootwait ro androidboot.console=ttyAMA0 mmci.fmax=12000000
> - FDT: VenHw(09831032-6FA3-4484-AF4F-0A000A8D3A82)/HD(1,MBR,0x00000000,0x3F,0x19FC0)/v2p-ca15-tc2.dtb
> - LoaderType: Linux kernel with Local FDT
> -----------------------
> Global FDT Config
> - VenHw(09831032-6FA3-4484-AF4F-0A000A8D3A82)/HD(1,MBR,0x00000000,0x3F,0x19FC0)/v2p-ca15-tc2.dtb
> -----------------------
> [a] Boot Manager
> [b] Shell
> [c] Reboot
> [d] Shutdown
> Start: a
> [1] Add Boot Device Entry
> [2] Update Boot Device Entry
> [3] Remove Boot Device Entry
> [4] Update FDT path
> [5] Return to main menu
> Choice: 3
> [1] Linaro image on SD card
> Delete entry: 1
> [1] Add Boot Device Entry
> [2] Update Boot Device Entry
> [3] Remove Boot Device Entry
> [4] Update FDT path
> [5] Return to main menu
> Choice: 1
> [1] VenHw(E7223039-5836-41E1-B542-D7EC736C5E59)
> [2] VenHw(02118005-9DA7-443A-92D5-781F022AEDBB)
> [3] VenHw(1F15DA3C-37FF-4070-B471-BB4AF12A724A)
> [4] VenHw(CC2CBF29-1498-4CDD-8171-F8B6B41D0909)
> [5] VenHw(09831032-6FA3-4484-AF4F-0A000A8D3A82)
> Select the Boot Device:
>
>
> When I try to delete and add new boot entry, I dont see option for TFTP option
> unlike it is mentioned in
>
> https://wiki.linaro.org/ARM/UEFI#Configuring_A5.2C_TC1_and_TC2
>
> Can you please help me in configuring it?.
>
> In fact, when I try to add an entry, uefi asks for kernel start
> address like below
>
> [1] Add Boot Device Entry
> [2] Update Boot Device Entry
> [3] Remove Boot Device Entry
> [4] Update FDT path
> [5] Return to main menu
> Choice: 1
> [1] VenHw(E7223039-5836-41E1-B542-D7EC736C5E59)
> [2] VenHw(02118005-9DA7-443A-92D5-781F022AEDBB)
> [3] VenHw(1F15DA3C-37FF-4070-B471-BB4AF12A724A)
> [4] VenHw(CC2CBF29-1498-4CDD-8171-F8B6B41D0909)
> [5] VenHw(09831032-6FA3-4484-AF4F-0A000A8D3A82)
> Select the Boot Device: 5
> Starting Address of the EFI Application or the kernel:
>
> What should be the address that I should give here?. Such information is not
> available in the wiki page
>
> Thanks & Regards
> Vijay
All the patches required to build UEFI for the ARM Foundation and Base
Models have been committed to subversion (revision 14628).
The wikipage
(https://sourceforge.net/apps/mediawiki/tianocore/index.php?title=ArmPlatfor
mPkg/AArch64) has been updated to use the repository instead of the
snapshot.
It is recommended to apply the patch "Fixed calculation of BaseOfCode in
GenFw when the first code section is aligned" (sent on July 16th on the
mailing-list). A copy of this patch can be found in
ArmPlatformPkg/Documentation/patch/BaseTools-Pending-Patches.patch.
patch -p1 <
ArmPlatformPkg/Documentation/patches/BaseTools-Pending-Patches.patch
The snapshot contains changes to add AArch64 support to EdkShellPkg
(required to start UEFI SCT) that is not yet into subversion. The latest
version of this patch will be sent soon on the mailing-list.
From: Olivier Martin [mailto:olivier.martin@arm.com]
Sent: 26 July 2013 21:34
To: edk2-devel(a)lists.sourceforge.net; boot-architecture(a)lists.linaro.org
Cc: Harry Liebel
Subject: ARM 64-bit - UEFI on the AArch64 Models
After the UEFI 2.4 specification - that contains the AArch64 (the ARM 64-bit
architecture) Binding - was approved last week, I started to send the
AArch64 patchset to be reviewed by the different EDK2 maintainers.
Because patches are still waiting to be approved and also not all the
patches have been sent yet (such as the pre-built binaries and few minor
others), I created a snapshot of the latest subversion (svn rev 14505 -
Friday 26 Jul 2013) with the AArch64 pathset to make it easier for people to
play with UEFI on AArch64 platforms.
The main reason of creating a snapshot and not a patch is binary data are
not really portable in patch files.
This archive is only a short term solution and should not be considered as a
release package (some AArch64 patches could diverge from their original
revision). The archive will be removed after all the patches will have been
accepted by the maintainers.
'Direct' link to the archive:
http://sourceforge.net/projects/edk2/files/ARM/aarch64-uefi-rev14505.tgz/dow
nload
Tutorial to build and run AArch64 EDK2 on the Foundation and Base FVP Model:
https://sourceforge.net/apps/mediawiki/tianocore/index.php?title=ArmPlatform
Pkg/AArch64
Note: The AArch64 Foundation FVP Model is free to download. So anyone could
try to build and run AArch64 UEFI on this Virtual Platform.
Thanks,
Olivier
On 09/04/2013 10:55 AM, Ian Campbell wrote:
> On Wed, 2013-09-04 at 10:43 +0200, Andre Przywara wrote:
>
>> I am about to write up a more elaborate technical rationale describing
>> the problems with multiboot on ARM:
>>
>> https://wiki.linaro.org/AndrePrzywara/Multiboot
>
> Doesn't seem to exist? A search for "mulitboot" doesn't seem to throw up
> the one you meant either.
Try again now. As mentioned "I am about to write ..." ;-)
Thanks,
Andre.
>>> So, is having a more generic solution really needed?
>>
>> Not necessarily needed, but useful, I think. As described above I don't
>> see any technical obstacles of doing it in a more generic way, so we
>> could as well go ahead with this. On x86 from time to time the need for
>> additional binaries pops up (early microcode loading, for instance), so
>> why not be be prepared.
>
> I agree. There have also been occasions where people doing
> disaggregation have wanted to start multiple initial domains, requiring
> additional modules at load time. I don't think being generic and
> extensible is costing too much here.
>
> Ian.
>
When testing Roy Franz's ARM UEFI stub kernel loader patches on a TC2
platform, the loader (correctly) highlighted an issue that has been
lurking unnoticed for a while: the very UEFI image actually makes
following the Linux boot protocol impossible.
Roy's stub takes the paranoid (and correct) approach of explicitly
allocating in UEFI the regions the zImage may need to be relocated to
(based on original load address) and that which it will decompress
into (based on some masking operations relative to the resulting entry
point).
It also attempts to allocate a "big enough" region to ensure the
decompressed kernel, with BSS, will fit. This operation fails on the
TC2 tianocore port, and if basic arithmetic does not fail me, would
also fail at least on Samsung Arndale and TI Beagleboard (I have yet
to verify).
The problem is that on all these platforms, the UEFI binary is linked
to execute at or near the start of RAM on the platform. Oliver figured
this out for me for TC2, and has promised to look into what would be
the best way of resolving this for that platform.
On these platforms, kernel decompression may result in overwriting the
initial UEFI image in RAM, before ExitBootServices(). While this may
work on some platforms, there are no guarantees. This region could
even contain code or data required by runtime services.
I have updated the (fairly random) list of UEFI port requirements at
https://wiki.linaro.org/LEG/Engineering/Kernel/UEFI/BSP
But several BSPs will need to change, along with their documentation.
/
Leif
On Tuesday 30 July 2013 05:21 PM, Khasim Syed Mohammed wrote:
> Hi UEFI team,
>
> We are in the process of evaluating the tianocore EDKII for Android. I
> have the same booting on Arndale, but I am unable to find commands or
> procedure to flash (raw image) to onboard eMMC / SD cards.
It is implemented.Please refer the following wiki page for details
https://wiki.linaro.org/Boards/Arndale/Setup/EnterpriseUbuntuServer?action=…
>
> Can you please confirm if these features are already implemented in
> our sources?
>
> We need this info to estimate the effort for UEFI, kindly confirm at
> the earliest.
>
> Thanks.
>
> Regards,
> Khasim
Regards
Rony.
After the UEFI 2.4 specification - that contains the AArch64 (the ARM 64-bit
architecture) Binding - was approved last week, I started to send the
AArch64 patchset to be reviewed by the different EDK2 maintainers.
Because patches are still waiting to be approved and also not all the
patches have been sent yet (such as the pre-built binaries and few minor
others), I created a snapshot of the latest subversion (svn rev 14505 -
Friday 26 Jul 2013) with the AArch64 pathset to make it easier for people to
play with UEFI on AArch64 platforms.
The main reason of creating a snapshot and not a patch is binary data are
not really portable in patch files.
This archive is only a short term solution and should not be considered as a
release package (some AArch64 patches could diverge from their original
revision). The archive will be removed after all the patches will have been
accepted by the maintainers.
'Direct' link to the archive:
http://sourceforge.net/projects/edk2/files/ARM/aarch64-uefi-rev14505.tgz/dow
nload
Tutorial to build and run AArch64 EDK2 on the Foundation and Base FVP Model:
https://sourceforge.net/apps/mediawiki/tianocore/index.php?title=ArmPlatform
Pkg/AArch64
Note: The AArch64 Foundation FVP Model is free to download. So anyone could
try to build and run AArch64 UEFI on this Virtual Platform.
Thanks,
Olivier