building_l4re_pandaboard

[Wei Jin]

It seems to be the 'swp' instruction.
ARMv7 processors don't support 'swp' instruction but the prebuilt ramdisk
contains a 'swp'.
If my gusee is right, then you could solve this problem by enabling
CONFIG_SWP_EMULATE
in linux.
Here's the related kernel doc:
swp_emulation<https://www.kernel.org/doc/Documentation/arm/swp_emulation>
.


On Fri, Feb 7, 2014 at 10:16 PM, Комаров Тимофей <happycorsair at yandex.ru>wrote:

> Hello, guys!
>
> I've successfully built the latest L4RE snapshot for beagleboard. Any apps
> and even L4Linux work like a charm. It simply rocks!
>
> Right now I'm trying to run the latest snapshot on pandaboard. I've
> successfully built it. Helloworld example is OK, but L4Linux gets a certain
> error while booting:
>
> l4linux | libio: Warning: Query of 'vbus' failed!
> l4linux | PH  0 (t:        1) offs=00008000 vaddr=02000000 vend=02362f1c
> l4linux |                     phys=02000000 ephys=02362f1c
> l4linux |                     f_sz=002de3b6 memsz=00362f1c flgs=rwx
> l4linux | PH  1 (t:        4) offs=002a16ec vaddr=022996ec vend=02299710
> l4linux |                     phys=022996ec ephys=02299710
> l4linux |                     f_sz=00000024 memsz=00000024 flgs=r-x
> l4linux | PH  2 (t: 1685382481) offs=00000000 vaddr=00000000 vend=00000000
> l4linux |                     phys=00000000 ephys=00000000
> l4linux |                     f_sz=00000000 memsz=00000000 flgs=rwx
> l4linux | Starting binary at 0x20002a0, argc=7 argv=0x80007f8c
> *argv=0xb1007ff0m
> l4linux | External resolver is at 0xa8000798
> l4linux | ======> L4Linux starting... <========
> l4linux | Linux version 3.12.0-l4 (user1 at debian) (gcc version 4.7.3
> (Sourcery C4
> l4linux | Binary name: rom/vmlinuz.arm
> l4linux |    This is an AEABI build.
> l4linux | Linux kernel command line (6 args): mem=64M console=ttyLv0
> l4x_rd=romh
> l4linux | CPU mapping (l:p)[1]: 0:0
> l4linux | Image: 02000000 - 02400000 [4096 KiB].
> l4linux | Areas: Text:     02000000 - 022b8000 [2784kB] (a bit longer)
> l4linux |        Data:     022b8000 - 022d9200 [132kB]
> l4linux |        Initdata: 0229a000 - 022b635c [112kB]
> l4linux |        BSS:      022de3b6 - 02362f1c [530kB]
> l4linux | Device scan:
> l4linux | Device scan done.
> l4linux | l4lx_thread_create: Created thread 413 (cpu0) (u:b3000e00,
> v:b3000c00)
> l4linux | main thread will be 413
> l4linux | l4x_register_pointer_section: addr = 02000000 size = 3551232
> l4linux | section-with-init: Virt: 0x2000000 to 0x2362f1b [3467 KiB]
> l4linux | section-with-init: Phys: 0x8031e000 to 0x80680f1b, [3467 KiB]
> l4linux | Main thread running, waiting...
> l4linux | L4x: Memory size: 64MB
> l4linux | L4x: Setting superpages for main memory
> l4linux | L4x: Adjusted memory start: 02000000
> l4linux |     Main memory: Virt: 0x2400000 to 0x63fffff [65536 KiB]
> l4linux |     Main memory: Phys: 0x81900000 to 0x858fffff, [65536 KiB]
> l4linux | l4x: vmalloc area: 06400000 - 0e400000
> l4linux | l4x_register_pointer_section: addr = 02000000 size = 3551232
> l4linux |            text: Virt: 0x2000000 to 0x2362f1b [3467 KiB]
> l4linux |            text: Phys: 0x8031e000 to 0x80680f1b, [3467 KiB]
> l4linux | l4x_rd_path: rom/ramdisk-arm.rd
> l4linux | Loading: rom/ramdisk-arm.rd
> l4linux | INITRD: Size of RAMdisk is 3072KiB
> l4linux | RAMdisk from 00002000 to 00302000 [3072KiB]
> l4linux | 'swp(b)' instruction at 021ec5a0 and faulting.
> l4linux | Linux built for the wrong ARM version?
>
> The last 2 lines are going to be repeated forever :-)
>
> I've tried both 4.7 and 4.8 gcc by Linaro and CodeSourcery and always get
> the same error.
>
> What can be a problem?
>
> Greetings!
> Looking forward for your help!
>
> _______________________________________________
> l4-hackers mailing list
> l4-hackers at os.inf.tu-dresden.de
> http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers
>
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