Add network device to L4Linux

Yiyang Su suyiyang at hotmail.com
Thu Sep 21 17:07:45 CEST 2017


Hi Matthias,


I have tried another approach that to set up the network device on vexpress-a15 that simulated by Qemu.

But the boot process stops at the same point as on Cubietruck. If I delete the l4x_dtb=rom/vexpress_a15.dtb

from the cmdline, then it can boot the L4Linux. I attached the boot log.


Regards,

Yang


The boot log:

L4 Bootstrapper
  Build: #9 Do 21. Sep 13:49:59 CEST 2017, 5.4.1 20170404
  Scanning up to 256 MB RAM, starting at offset 32MB
  Memory size is 256MB (80000000 - 8fffffff)
  RAM: 0000000080000000 - 000000008fffffff: 262144kB
  Total RAM: 256MB
  Scanning fiasco
  Scanning sigma0
  Scanning moe
  Moving up to 13 modules behind 81100000
  moving module 02 { 81a33000-81a644ab } -> { 81b23000-81b544ab } [201900]
  moving module 01 { 81a21000-81a3233f } -> { 81b11000-81b2233f } [70464]
  moving module 00 { 8199a000-81a20d5b } -> { 81a8a000-81b10d5b } [552284]
  moving module 12 { 8169a000-81999fff } -> { 8178a000-81a89fff } [3145728]
  moving module 11 { 81278000-81699487 } -> { 81368000-81789487 } [4330632]
  moving module 10 { 81277000-81277086 } -> { 81367000-81367086 } [135]
  moving module 09 { 81276000-81276445 } -> { 81366000-81366445 } [1094]
  moving module 08 { 81275000-81275420 } -> { 81365000-81365420 } [1057]
  moving module 07 { 81271000-8127444b } -> { 81361000-8136444b } [13388]
  moving module 06 { 8123f000-812708b3 } -> { 8132f000-813608b3 } [202932]
  moving module 05 { 81094000-8123e8e7 } -> { 81184000-8132e8e7 } [1747176]
  moving module 04 { 81032000-810936b3 } -> { 81122000-811836b3 } [399028]
  moving module 03 { 81010000-8103146f } -> { 81100000-8112146f } [136304]
  Loading fiasco
  Loading sigma0
  Loading moe
  find kernel info page...
  found kernel info page (via ELF) at 80002000
Regions of list 'regions'
    [ 80000000,  800001db] {      1dc} Root   mbi_rt
    [ 80001000,  80001a7f] {      a80} Kern   fiasco
    [ 80002000,  80096fff] {    95000} Kern   fiasco
    [ 800c0000,  800ca3e7] {     a3e8} Sigma0 sigma0
    [ 800d0000,  800d6177] {     6178} Sigma0 sigma0
    [ 80140000,  8016eb7b] {    2eb7c} Root   moe
    [ 80170000,  8017661b] {     661c} Root   moe
    [ 81000000,  8100f5df] {     f5e0} Boot   bootstrap
    [ 81100000,  81a89fff] {   98a000} Root   Module
  found kernel options (via ELF) at 80003000
  API Version: (87) experimental
  Sigma0 config    ip:800c0100 sp:00000000
  Roottask config  ip:80140210 sp:00000000
  Starting kernel fiasco at 800011b8
Realview System ID: Rev=1 HBI=190 Build=f Arch=5 FPGA=00
Hello from Startup::stage2
Number of IRQs available at this GIC: 160
FPU: Initialize
FPU0: Subarch: 4, Part: 30, Rev: 0, Var: f, Impl: 41
ARM generic timer: freq=62500000 interval=62500 cnt=5156008
SERIAL ESC: allocated IRQ 37 for serial uart
Not using serial hack in slow timer handler.
Welcome to L4/Fiasco.OC!
L4/Fiasco.OC microkernel on arm
Rev: unknown compiled with gcc 5.4.1 20170404 for Realview    []
Build: #1 Thu Sep 21 11:11:54 CEST 2017

Calibrating timer loop... done.
MDB: use page size: 20
MDB: use page size: 12
SIGMA0: Hello!
  KIP @ 80002000
  allocated 4KB for maintenance structures
SIGMA0: Dump of all resource maps
RAM:------------------------
[4:80000000;80000fff]
[0:80097000;800bffff]
[0:800cb000;800cffff]
[0:800d7000;8013ffff]
[4:80140000;8016efff]
[0:8016f000;8016ffff]
[4:80170000;80176fff]
[0:80177000;810fffff]
[4:81100000;81a89fff]
[0:81a8a000;8effffff]
IOMEM:----------------------
[0:0;7fffffff]
[0:90000000;ffffffff]
mmap() called: unimplemented!
MOE: Hello world
MOE: found 235100 KByte free memory
MOE: found RAM from 80000000 to 8f000000
MOE: allocated 240 KByte for the page array @0x800d7000
MOE: virtual user address space [0-bfffffff]
MOE: rom name space cap -> [C:103000]
  BOOTFS: [81100000-81121470] [C:105000] l4re
  BOOTFS: [81122000-811836b4] [C:107000] ned
  BOOTFS: [81184000-8132e8e8] [C:109000] io
  BOOTFS: [8132f000-813608b4] [C:10b000] cons
  BOOTFS: [81361000-8136444c] [C:10d000] vexpress_a15.dtb
  BOOTFS: [81365000-81365421] [C:10f000] l4lx-net-vex.cfg
  BOOTFS: [81366000-81366446] [C:111000] l4lx-net-vex.devs
  BOOTFS: [81367000-81367087] [C:113000] l4lx-net-vex.io
  BOOTFS: [81368000-81789488] [C:115000] vmlinuz
  BOOTFS: [8178a000-81a8a000] [C:117000] ramdisk-arm.rd
MOE: cmdline: moe rom/l4lx-net-vex.cfg
MOE: Starting: rom/ned rom/l4lx-net-vex.cfg
MOE: loading 'rom/ned'
Ned says: Hi World!
Ned: loading file: 'rom/l4lx-net-vex.cfg'
Console Server
cons>
Created vcon channel: IO [41f010]
cons>
IO      | Io service
IO      | Verboseness level: 4
IO      | unused physical memory space:
IO      |   [00000000000000-0000007fffffff]
IO      |   [00000090000000-000000ffffffff]
IO      | no 'iommu' capability found use CPU-phys for DMA
IO      | Loading: config 'rom/l4lx-net-vex.devs'
IO      | Loading: config 'rom/l4lx-net-vex.io'
IO      | Real Hardware -----------------------------------
IO      | System Bus: hid=
IO      |   Resources: ==== start ====
IO      |   DMADOM  [00000000000000-00000000000000 1] non-pref (32bit) (align=0 flags=6)
IO      |   Resources: ===== end =====
IO      |   clcd: hid=AMBA PL110
IO      |     Resources: ==== start ====
IO      |     IOMEM   [00000010020000-00000010020fff 1000] non-pref (32bit) (align=fff flags=2)
IO      |     Resources: ===== end =====
IO      |   CTRL: hid=System Control
IO      |     Resources: ==== start ====
IO      |     IOMEM   [00000010000000-00000010000fff 1000] non-pref (32bit) (align=fff flags=2)
IO      |     Resources: ===== end =====
IO      |   kmi0: hid=
IO      |     Resources: ==== start ====
IO      |     IRQ     [0000000000002c-0000000000002c 1] none (32bit) (align=0 flags=1)
IO      |     IOMEM   [00000010006000-00000010006fff 1000] non-pref (32bit) (align=fff flags=2)
IO      |     Resources: ===== end =====
IO      |   virtio_mmio3: hid=
IO      |     Resources: ==== start ====
IO      |     IRQ     [0000000000004b-0000000000004b 1] none (32bit) (align=0 flags=1)
IO      |     IOMEM   [00000010013600-000000100137ff 200] non-pref (32bit) (align=1ff flags=2)
IO      |     Resources: ===== end =====
IO      |   NIC: hid=smc91x
IO      |     Clients: ===== start ====
IO      |       NIC: [N2Vi9Proxy_devE]
IO      |     Clients: ===== end ====
IO      |     Resources: ==== start ====
IO      |     IRQ     [0000000000003c-0000000000003c 1] none (32bit) (align=0 flags=1)
IO      |     IOMEM   [00000010030000-00000010030fff 1000] non-pref (32bit) (align=fff flags=2)
IO      |     Resources: ===== end =====
IO      |   kmi1: hid=
IO      |     Resources: ==== start ====
IO      |     IRQ     [0000000000002d-0000000000002d 1] none (32bit) (align=0 flags=1)
IO      |     IOMEM   [00000010007000-00000010007fff 1000] non-pref (32bit) (align=fff flags=2)
IO      |     Resources: ===== end =====
IO      | warning: could not register control interface at cap 'platform_ctl'
IO      | Ready. Waiting for request.
PH  0 offs=00010000 flags=rwx PH-type=0x1
      virt=02000000 evirt=0247b5bc
      phys=02000000 ephys=0247b5bc
      f_sz=003f24df memsz=0047b5bc
PH  1 offs=003b1cf8 flags=r-x PH-type=0x4
      virt=023a1cf8 evirt=023a1d1c
      phys=023a1cf8 ephys=023a1d1c
      f_sz=00000024 memsz=00000024
PH  2 offs=00000000 flags=rwx PH-type=0x6474e551
      virt=00000000 evirt=00000000
      phys=00000000 ephys=00000000
      f_sz=00000000 memsz=00000000
Starting binary at 0x2000330, argc=10 argv=0xafff4f7c *argv=0xb1007ff4 argv0=rom/vmlinuz
External resolver is at 0xa80007f0
======> L4Linux starting... <========
Linux version 4.7.0-l4 (yiyang at i85217) (gcc version 5.4.1 20170404 (Linaro GCC 5.4-2017.05) ) #2 Thu Sep 21 13:29:53 CEST 2017
Binary name: rom/vmlinuz
   This is an AEABI build.
Linux kernel command line (9 args): mem=64M console=ttyLv0 earlyprintk=1 l4x_rd=rom/ramdisk-arm.rd root=1:0 rw ramdisk_size=4000 l4x_dtb=rom/vexpress_a15.dtb l4shmnet.add=shmns,macpart=1
CPU mapping (l:p)[1]: 0:0
Image: 02000000 - 02600000 [6144 KiB].
Areas: Text:     02000000 - 023a1d1c [3719kB]
       RO-Data:  022c0000 - 0238d000 [820kB]
       Data:     023ca000 - 023ed200 [140kB]
       Init:     023a2000 - 023ca000 [160kB]
       BSS:      023f24df - 0247b5bc [548kB]
Device scan:
  Device: L4ICU
  Device: NIC
    IRQ: 0000003c - 0000003c
    MEM: 10030000 - 10030fff
Device scan done.
IO      | vbus l4linux does not support a global DMA domain
error: could not assign DMA space to vBUS: -2
       DMA will not work!
l4lx_thread_create: Created thread 41d (cpu0) (u:b3000e00, v:b3000c00, sp:023cbfa4)
main thread will be 41d
L4x: section-with-init(-data): Virt: 0x2000000 to 0x247bfff [4592 KiB]
L4x: section-with-init-text: Virt: 0x2000000 to 0x247bfff [4592 KiB]
L4x: Main thread running, waiting...
L4x: Memory size: 64MB
L4x: Setting superpages for main memory
L4x: Adjusted memory start: 02000000
L4x:     Main memory: Virt: 0x2600000 to 0x65fffff [65536 KiB]
l4x: vmalloc area: 06600000 - 0e600000
L4x:            text: Virt: 0x2000000 to 0x247bfff [4592 KiB]




________________________________
From: Matthias Lange <matthias.lange at kernkonzept.com>
Sent: 15 September 2017 08:08
To: l4-hackers at os.inf.tu-dresden.de
Cc: Yiyang Su
Subject: Re: Add network device to L4Linux

Hi Yang,

I have to admit that I don't know what's going wrong yet. Your
configuration looks reasonable. I need a little bit more time to
reproduce your issue and to analyze the problem.

Regards,
Matthias.

On 09/13/2017 01:56 PM, Yiyang Su wrote:
> Hi,
>
>
> Starting from a previous work [1], I have succeeded in booting L4Linux on
>
> Cubietruck with the snapshot (l4re-snapshot-2016082114). Then I have
>
> been trying to configure L4Linux to access Ethernet device. With current
>
> configuration I cannot boot L4Llinux anymore. Following is my configuration
>
> and boot log:
>
>
> l4lx-net-cubi.devs
>
> ===========================================
>
> local Res = Io.Res
> local Hw = Io.Hw
>
> Io.hw_add_devices(function()
>     NIC = Hw.Device(function()
>         Property.hid = "sun7ia20gmac";
>         compatible = {"allwinner,sun7i-a20-gmac"};
>         Resource.regs = Res.mmio(0x01c50000, 0x01c5ffff);
>         --Resource.irq = Res.irq(0);
>         Resource.irq = Res.irq(85);
>         --Resource.irq = Res.irq(4);
>         Property.flags = Io.Hw_device_DF_dma_supported;
>     end);
> end)
>
>
>
> l4lx-net-cubi.io
>
> ===========================================
>
> local hw = Io.system_bus()
>
> Io.add_vbus("l4linux", Io.Vi.System_bus
> {
>     NIC = wrap(hw:match("allwinner,sun7i-a20-gmac"));
> })
>
>
> l4lx-net-cubi.cfg
>
> ===========================================
>
> local L4 = require("L4");
>
> local loader = L4.default_loader;
>
> vbus_l4linux = loader:new_channel();
>
> loader:start(
>     {
>         caps = {
>             icu = L4.Env.icu,
>             sigma0 = L4.cast(L4.Proto.Factory,
> L4.Env.sigma0):create(L4.Proto.Sigma0),
>             l4linux = vbus_l4linux:svr(),
>         },
>         log = {"IO", "y"},
>         l4re_dbg = L4.Dbg.Warn,
>     },
>     "rom/io -vvv rom/l4lx-net-cubi.devs rom/l4lx-net-cubi.io"
> );
>
> -- start L4Linux
> loader:start(
>     {
>         caps = {
>             vbus = vbus_l4linux,
>         },
>         --log = {"l4linux", "cyan"},
>         log = L4.Env.log:m("rws"),
>         l4re_dbg = L4.Dbg.Warn,
>     },
>     "rom/vmlinuz mem=64M console=ttyLv0 earlyprintk=1
> l4x_dtb=rom/sun7i-a20-cubietruck.dtb "
>     .. "l4x_rd=rom/ramdisk-" ..  L4.Info.arch() .. ".rd "
>     .. "root=1:0 rw ramdisk_size=4000"
> );
>
>
> modules.list
> ============================================
> entry L4Linux-net-cubi
> roottask moe rom/l4lx-net-cubi.cfg
> module l4re
> module ned
> module io
> module sun7i-a20-cubietruck.dtb
> module l4lx-net-cubi.cfg
> module l4lx-net-cubi.devs
> module l4lx-net-cubi.io
> module vmlinuz
> module[perl] "ramdisk-$ENV{ARCH}.rd"
>
>
> boot log
> ===================================
> U-Boot SPL 2017.03-rc3 (Aug 14 2017 - 13:26:17)
> DRAM: 2048 MiB
> CPU: 912000000Hz, AXI/AHB/APB: 3/2/2
> Trying to boot from MMC1
>
>
> U-Boot 2017.03-rc3 (Aug 14 2017 - 13:26:17 +0200) Allwinner Technology
>
> CPU:   Allwinner A20 (SUN7I)
> Model: Cubietech Cubietruck
> I2C:   ready
> DRAM:  2 GiB
> MMC:   SUNXI SD/MMC: 0
> *** Warning - bad CRC, using default environment
>
> Setting up a 1024x768 vga console (overscan 0x0)
> In:    serial
> Out:   vga
> Err:   vga
> SCSI:  SATA link 0 timeout.
> AHCI 0001.0100 32 slots 1 ports 3 Gbps 0x1 impl SATA mode
> flags: ncq stag pm led clo only pmp pio slum part ccc apst
> Net:   eth0: ethernet at 01c50000
> starting USB...
> USB0:   USB EHCI 1.00
> USB1:   USB OHCI 1.0
> USB2:   USB EHCI 1.00
> USB3:   USB OHCI 1.0
> scanning bus 0 for devices... 1 USB Device(s) found
> scanning bus 2 for devices... 1 USB Device(s) found
>        scanning usb for storage devices... 0 Storage Device(s) found
> Hit any key to stop autoboot:  0
> switch to partitions #0, OK
> mmc0 is current device
> Scanning mmc 0:1...
> Found U-Boot script /boot/boot.scr
> reading /boot/boot.scr
> 1165 bytes read in 24 ms (46.9 KiB/s)
> ## Executing script at 43100000
> Failed to mount ext2 filesystem...
> ** Unrecognized filesystem type **
> reading boot/uImage
> 10481728 bytes read in 652 ms (15.3 MiB/s)
> ## Booting kernel from Legacy Image at 48000000 ...
>    Image Name:   L4 Image #32
>    Image Type:   ARM Linux Kernel Image (uncompressed)
>    Data Size:    10481664 Bytes = 10 MiB
>    Load Address: 41000000
>    Entry Point:  41000000
>    Verifying Checksum ... OK
>    Loading Kernel Image ... OK
>
> Starting kernel ...
>
>
> L4 Bootstrapper
>   Build: #32 Mi 13. Sep 11:47:18 CEST 2017, 4.9.4
>   Scanning up to 1024 MB RAM, starting at offset 32MB
>   Memory size is 1024MB (40000000 - 7fffffff)
>   RAM: 0000000040000000 - 000000007fffffff: 1048576kB
>   Total RAM: 1024MB
>   Scanning fiasco
>   Scanning sigma0
>   Scanning moe
>   Moving up to 12 modules behind 41100000
>   moving module 02 { 419cd000-419fe49b } -> { 41abd000-41aee49b } [201884]
>   moving module 01 { 419bb000-419cc337 } -> { 41aab000-41abc337 } [70456]
>   moving module 00 { 4192d000-419ba98b } -> { 41a1d000-41aaa98b } [579980]
>   moving module 11 { 4162d000-4192cfff } -> { 4171d000-41a1cfff } [3145728]
>   moving module 10 { 4122b000-4162c473 } -> { 4131b000-4171c473 } [4199540]
>   moving module 09 { 4122a000-4122a0c2 } -> { 4131a000-4131a0c2 } [195]
>   moving module 08 { 41229000-412291ef } -> { 41319000-413191ef } [496]
>   moving module 07 { 41228000-4122835d } -> { 41318000-4131835d } [862]
>   moving module 06 { 4121f000-41227d73 } -> { 4130f000-41317d73 } [36212]
>   moving module 05 { 41094000-4121e8d3 } -> { 41184000-4130e8d3 } [1616084]
>   moving module 04 { 41032000-410936a7 } -> { 41122000-411836a7 } [399016]
>   moving module 03 { 41010000-4103145f } -> { 41100000-4112145f } [136288]
>   Loading fiasco
>   Loading sigma0
>   Loading moe
>   find kernel info page...
>   found kernel info page (via ELF) at 40002000
> Regions of list 'regions'
>     [ 40000000,  400001cf] {      1d0} Root   mbi_rt
>     [ 40001000,  40001a7f] {      a80} Kern   fiasco
>     [ 40002000,  4009afff] {    99000} Kern   fiasco
>     [ 400c0000,  400ca287] {     a288} Sigma0 sigma0
>     [ 400d0000,  400d6177] {     6178} Sigma0 sigma0
>     [ 40140000,  40168fcb] {    28fcc} Root   moe
>     [ 40170000,  40176ff3] {     6ff4} Root   moe
>     [ 41000000,  4100f5cb] {     f5cc} Boot   bootstrap
>     [ 41100000,  41a1cfff] {   91d000} Root   Module
>   found kernel options (via ELF) at 40003000
>   API Version: (87) experimental
>   Sigma0 config    ip:400c0100 sp:00000000
>   Roottask config  ip:40140210 sp:00000000
>   Starting kernel fiasco at 4000124c
>   Non-HYP kernel detected but running in HYP mode, switching back.
> Hello from Startup::stage2
> Number of IRQs available at this GIC: 160
> FPU: Initialize
> FPU0: Subarch: 2, Part: 30, Rev: 4, Var: 7, Impl: 41
> ARM generic timer: freq=24000000 interval=24000 cnt=212673046
> SERIAL ESC: allocated IRQ 33 for serial uart
> Not using serial hack in slow timer handler.
> Welcome to L4/Fiasco.OC!
> L4/Fiasco.OC microkernel on arm
> Rev: unknown compiled with gcc 4.9.4 for Allwinner A20    []
> Build: #4 Mon Sep 11 10:25:38 CEST 2017
>
> Calibrating timer loop... done.
> MDB: use page size: 20
> MDB: use page size: 12
> SIGMA0: Hello!
>   KIP @ 40002000
>   allocated 4KB for maintenance structures
> SIGMA0: Dump of all resource maps
> RAM:------------------------
> [4:40000000;40000fff]
> [0:4009b000;400bffff]
> [0:400cb000;400cffff]
> [0:400d7000;4013ffff]
> [4:40140000;40168fff]
> [0:40169000;4016ffff]
> [4:40170000;40176fff]
> [0:40177000;410fffff]
> [4:41100000;41a1cfff]
> [0:41a1d000;7effffff]
> IOMEM:----------------------
> [0:0;3fffffff]
> [0:80000000;ffffffff]
> MOE: Hello world
> MOE: found 1021976 KByte free memory
> MOE: found RAM from 40000000 to 7f000000
> MOE: allocated 1008 KByte for the page array @0x40177000
> MOE: virtual user address space [0-bfffffff]
> MOE: rom name space cap -> [C:103000]
>   BOOTFS: [41100000-41121460] [C:105000] l4re
>   BOOTFS: [41122000-411836a8] [C:107000] ned
>   BOOTFS: [41184000-4130e8d4] [C:109000] io
>   BOOTFS: [4130f000-41317d74] [C:10b000] sun7i-a20-cubietruck.dtb
>   BOOTFS: [41318000-4131835e] [C:10d000] l4lx-net-cubi.cfg
>   BOOTFS: [41319000-413191f0] [C:10f000] l4lx-net-cubi.devs
>   BOOTFS: [4131a000-4131a0c3] [C:111000] l4lx-net-cubi.io
>   BOOTFS: [4131b000-4171c474] [C:113000] vmlinuz
>   BOOTFS: [4171d000-41a1d000] [C:115000] ramdisk-arm.rd
> MOE: cmdline: moe rom/l4lx-net-cubi.cfg
> MOE: Starting: rom/ned rom/l4lx-net-cubi.cfg
> MOE: loading 'rom/ned'
> Ned says: Hi World!
> Ned: loading file: 'rom/l4lx-net-cubi.cfg'
> IO      | Io service
> IO      | Verboseness level: 4
> IO      | unused physical memory space:
> IO      |   [00000000000000-0000003fffffff]
> IO      |   [00000080000000-000000ffffffff]
> IO      | no 'iommu' capability found use CPU-phys for DMA
> IO      | Loading: config 'rom/l4lx-net-cubi.devs'
> IO      | warning: inconsistent fixed resource @ device: /System Bus/
> IO      |   : hid=sun7ia20gmac
> IO      |   DMADOM  [00000000000000-00000000000000 1] non-pref (32bit)
> (align=0 flags=6)
> IO      | Loading: config 'rom/l4lx-net-cubi.io'
> IO      | Real Hardware -----------------------------------
> IO      | System Bus: hid=
> IO      |   Resources: ==== start ====
> IO      |   DMADOM  [00000000000000-00000000000000 1] non-pref (32bit)
> (align=0 flags=6)
> IO      |   Resources: ===== end =====
> IO      |   NIC: hid=sun7ia20gmac
> IO      |     Clients: ===== start ====
> IO      |       NIC: [N2Vi9Proxy_devE]
> IO      |     Clients: ===== end ====
> IO      |     Resources: ==== start ====
> IO      |     IRQ     [00000000000055-00000000000055 1] none (32bit)
> (align=0 flags=1)
> IO      |     IOMEM   [00000001c50000-00000001c5ffff 10000] non-pref
> (32bit) (align=ffff flags=2)
> IO      |     DMADOM  [00000000000000-00000000000000 1] non-pref (32bit)
> (align=0 flags=6)
> IO      |     Resources: ===== end =====
> IO      | warning: could not register control interface at cap
> 'platform_ctl'
> IO      | Ready. Waiting for request.
> PH  0 offs=00010000 flags=rwx PH-type=0x1
>       virt=02000000 evirt=0245b5dc
>       phys=02000000 ephys=0245b5dc
>       f_sz=003d3653 memsz=0045b5dc
> PH  1 offs=00394898 flags=r-x PH-type=0x4
>       virt=02384898 evirt=023848bc
>       phys=02384898 ephys=023848bc
>       f_sz=00000024 memsz=00000024
> PH  2 offs=00000000 flags=rwx PH-type=0x6474e551
>       virt=00000000 evirt=00000000
>       phys=00000000 ephys=00000000
>       f_sz=00000000 memsz=00000000
> Starting binary at 0x2000330, argc=9 argv=0xafff4f84 *argv=0xb1007ff4
> argv0=rom/vmlinuz
> External resolver is at 0xa80007cc
> ======> L4Linux starting... <========
> Linux version 4.7.0-l4 (yiyang at i85217) (gcc version 4.9.4 (Linaro GCC
> 4.9-2017.01) ) #4 Wed Sep 13 11:18:30 CEST 2017
> Binary name: rom/vmlinuz
>    This is an AEABI build.
> Linux kernel command line (8 args): mem=64M console=ttyLv0 earlyprintk=1
> l4x_dtb=rom/sun7i-a20-cubietruck.dtb l4x_rd=rom/ramdisk-arm.rd root=1:0
> rw ramdisk_size=4000
> CPU mapping (l:p)[1]: 0:0
> Image: 02000000 - 02600000 [6144 KiB].
> Areas: Text:     02000000 - 023848bc [3602kB]
>        RO-Data:  022ad000 - 02370000 [780kB]
>        Data:     023ac000 - 023cefe0 [139kB]
>        Init:     02385000 - 023ac000 [156kB]
>        BSS:      023d3653 - 0245b5dc [543kB]
> Device scan:
>   Device: L4ICU
>   Device: NIC
>     IRQ: 00000055 - 00000055
>     MEM: 01c50000 - 01c5ffff
>     DMAD: 00000000 - 00000000
> Device scan done.
> l4lx_thread_create: Created thread 41e (cpu0) (u:b3000e00, v:b3000c00,
> sp:023adfa4)
> main thread will be 41e
> L4x: section-with-init(-data): Virt: 0x2000000 to 0x245bfff [4464 KiB]
> section-with-init(-data): Phys: 0x40273000 to 0x406cefff, [4464 KiB]
> L4x: section-with-init-text: Virt: 0x2000000 to 0x245bfff [4464 KiB]
> error: failed to get physical address for 2000000.
> L4x: Main thread running, waiting...
> L4x: Memory size: 64MB
> L4x: Setting superpages for main memory
> L4x: Adjusted memory start: 02000000
> L4x:     Main memory: Virt: 0x2600000 to 0x65fffff [65536 KiB]
>     Main memory: Phys: 0x41c00000 to 0x45bfffff, [65536 KiB]
> l4x: vmalloc area: 06600000 - 0e600000
> L4x:            text: Virt: 0x2000000 to 0x245bfff [4464 KiB]
> error: failed to get physical address for 2000000.
>
>
> The boot process stops at this point. Compare with other boot logs in
> archives the following step could
> be the loading ramdisk and device tree blob. Then I delete the
> "l4x_dtb=rom/sun7i-a20-cubietruck.dtb"
> from the cmdline, it can boot the L4Linux again. Does it mean there is a
> problem with loading the device tree blob?
>
> Any suggestion is very appreciated. Thanks.
>
> Best regards,
> Yang
>
>
> [1] http://os.inf.tu-dresden.de/pipermail/l4-hackers/2017/008120.html
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