Setting up network in L4Linux

Matthias Lange matthias.lange at kernkonzept.com
Fri Jan 22 09:37:52 CET 2016


Hi,

On 01/21/2016 03:02 PM, Nourhan Mohamed wrote:
> Dear Mattias,
> 
> Thanks for helping out. But I still don't get where should I add the
> .dtb compiled file? and how would I manage to access it through L4Linux?

You need to add the <name.dtb> file to your entry in the modules.list.
In your Lua configuration where you start L4Linux you need to add
another Linux kernel cmdline parameter like

  l4x_dtb=rom/<name.dtb>

Then L4Linux should find and use the device tree.

Matthias.

> 
> BR,
> Nourhan
> 
> On Wed, Jan 20, 2016 at 6:48 PM, Matthias Lange
> <matthias.lange at kernkonzept.com <mailto:matthias.lange at kernkonzept.com>>
> wrote:
> 
>     Hi,
> 
>     are you using a device tree yet? In order for the driver matching to
>     work in (L4)Linux somebody must tell Linux about the available devices.
>     On ARM this can be done by either declaring a platform device statically
>     or by using a device tree. So you have to enable "Flattened device tree
>     support" in L4Linux and provide a simple device tree. See
>     arch/l4/boot/dts/simple.dts for an example. And do not forget to compile
>     the *.dts into a *.dtb file using 'dtc'. The name of the device tree
>     file is provided on L4Linux' cmdline using "l4x_dtb=<name>".
> 
>     Matthias.
> 
>     On 01/20/2016 06:22 PM, Nourhan Mohamed wrote:
>     > I have been trying to configure *L4Linux *to connect to the internet
>     > through *L4Re/Fiasco.OC*. I am using *qemu *on a *Versatile Express*
>     > Machine with *Cortex-A15* cpu. Below is my current configuration:
>     >
>     > *L4re-snapsot:* l4re-snapshot-2015123115
>     >
>     > *obj/l4/arm-ca/conf/Makeconf.boot:*
>     > MODULE_SEARCH_PATH=/home/nour/l4re/obj/fiasco/arm-mp-rv-a9-vexpress:/home/nour/l4re/obj/l4linux/arm-mp:/home/nour/l4re/files:/home/nour/l4re/files/cfg:/home/nour/l4re/src/l4/conf:/home/nour/l4re/src/l4/conf/examples
>     > QEMU_OPTIONS += -M vexpress-a15 -cpu cortex-a15 -smp 4
>     > QEMU_OPTIONS += -m 256 -serial stdio
>     > QEMU_OPTIONS += -net nic,model=lan9118 -net user
>     > PLATFORM_TYPE := rv_vexpress
>     >
>     > *l4re/files/cfg/arm-rv.devs:*
>     > -- vim:set ft=lua:
>     >
>     > local Res = Io.Res
>     > local Hw = Io.Hw
>     >
>     > Io.hw_add_devices(function()
>     >   NIC = Hw.Device(function()
>     >     Property.hid = "smc91x";
>     >     compatible = {"smsc,lan9118"};
>     >     Resource.regs = Res.mmio(0x10030000, 0x10030fff);
>     >     Resource.irq = Res.irq(60);
>     >   end);
>     >
>     >   virtio_mmio3 = Hw.Device(function()
>     >     compatible = {"virtio,mmio"};
>     >     Resource.mem = Res.mmio(0x10013600, 0x100137ff);
>     >     Resource.irq = Res.irq(75);
>     >   end);
>     >
>     >   CTRL = Hw.Device(function()
>     >     Property.hid = "System Control";
>     >     Resource.regs = Res.mmio(0x10000000, 0x10000fff);
>     >   end);
>     >
>     >   clcd = Hw.Device(function()
>     >     Property.hid = "AMBA PL110";
>     >     compatible = {"arm,pl111","arm,primecell"};
>     >     Resource.regs = Res.mmio(0x10020000, 0x10020fff);
>     >   end);
>     >
>     >   kmi0 = Hw.Device(function()
>     >     compatible = {"arm,pl050","arm,primecell"};
>     >     Resource.regs = Res.mmio(0x10006000, 0x10006fff);
>     >     Resource.irq = Res.irq(44);
>     >   end);
>     >
>     >   kmi1 = Hw.Device(function()
>     >     compatible = {"arm,pl050","arm,primecell"};
>     >     Resource.regs = Res.mmio(0x10007000, 0x10007fff);
>     >     Resource.irq = Res.irq(45);
>     >   end);
>     > end)
>     >
>     > *src/l4/conf/examples/l4lx-vbus.io <http://l4lx-vbus.io>
>     <http://l4lx-vbus.io>:*
>     > local hw = Io.system_bus();
>     >
>     > Io.add_vbus("l4linux", Io.Vi.System_bus
>     > {
>     >   NIC = wrap(hw:match("smsc,lan9118"));
>     > })
>     >
>     > src/l4/conf/examples/l4lx-net.cfg:
>     > -- vim:set ft=lua:
>     >
>     > local L4 = require("L4");
>     > local lxname = "vmlinuz";
>     >
>     > loader = L4.default_loader;
>     >
>     > vbus_l4linux = loader:new_channel();
>     > local shmns = loader:create_namespace({shm = "ipctest"});
>     >
>     > local cons = L4.default_loader:new_channel();
>     > L4.default_loader:start(
>     >   { caps = { cons = cons:svr() },
>     >   log = L4.Env.log, },
>     >   "rom/cons -k -a"
>     >   );
>     >
>     > L4.default_loader.log_fab = cons;
>     >
>     > loader:start(
>     >   { caps = {
>     >       sigma0  =
>     > L4.cast(L4.Proto.Factory,L4.Env.sigma0):create(L4.Proto.Sigma0);
>     >       icu     = L4.Env.icu;
>     >       l4linux = vbus_l4linux:svr();
>     >      },
>     >      log = {"IO", "magenta"},
>     >   }, "rom/io -vvv rom/arm-ve.devs rom/l4lx-vbus.io
>     <http://l4lx-vbus.io> <http://l4lx-vbus.io>");
>     >
>     > loader:start(
>     >   { caps = {
>     >       shmns = shmns:mode("rw"),
>     >       vbus = vbus_l4linux;
>     >     },
>     >     l4re_dbg = L4.Dbg.Warn,
>     >     log = {"l4linux", "cyan", "key=1"},
>     >   },
>     > "rom/" .. lxname .. " mem=64M console=ttyLv0 l4x_rd=rom/ramdisk-" ..
>     > L4.Info.arch() .. ".rd root=1:0 rw ramdisk_size=4000
>     > l4shmnet.add=shmns,macpart=1");
>     >
>     > *src/l4/conf/modules.list:*
>     > entry L4Linux-net
>     > roottask moe rom/l4lx-net.cfg
>     > module l4lx-net.cfg
>     > module l4re
>     > module ned
>     > module io
>     > module cons
>     > module l4lx-vbus.io <http://l4lx-vbus.io> <http://l4lx-vbus.io>
>     > module arm-ve.devs
>     > module vmlinuz
>     > module[perl] "ramdisk-$ENV{ARCH}.rd"
>     >
>     > *Run:*
>     > L4 Bootstrapper
>     >   Build: #4 Mi 20. Jan 18:13:56 CET 2016, 4.7.3
>     >   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 { 81a7c000-81aad49f } -> { 81b6c000-81b9d49f }
>     [201888]
>     >   moving module 01 { 81a6a000-81a7b33b } -> { 81b5a000-81b6b33b }
>     [70460]
>     >   moving module 00 { 819d8000-81a69ebb } -> { 81ac8000-81b59ebb }
>     [597692]
>     >   moving module 12 { 816d8000-819d7fff } -> { 817c8000-81ac7fff }
>     [3145728]
>     >   moving module 11 { 81256000-816d747b } -> { 81346000-817c747b }
>     [4723836]
>     >   moving module 10 { 81255000-81255446 } -> { 81345000-81345446 }
>     [1095]
>     >   moving module 09 { 81254000-8125415d } -> { 81344000-8134415d }
>     [350]
>     >   moving module 08 { 81222000-81253823 } -> { 81312000-81343823 }
>     [202788]
>     >   moving module 07 { 811f8000-81221623 } -> { 812e8000-81311623 }
>     [169508]
>     >   moving module 06 { 81085000-811f761b } -> { 81175000-812e761b }
>     [1517084]
>     >   moving module 05 { 8102b000-81084693 } -> { 8111b000-81174693 }
>     [366228]
>     >   moving module 04 { 81011000-8102a463 } -> { 81101000-8111a463 }
>     [103524]
>     >   moving module 03 { 81010000-810103cb } -> { 81100000-811003cb }
>     [972]
>     >   Loading fiasco
>     >   Loading sigma0
>     >   Loading moe
>     >   find kernel info page...
>     >   found kernel info page at 0x80002000
>     > Regions of list 'regions'
>     >     [ 80000000,  800001bf] {      1c0} Root   mbi_rt
>     >     [ 80001000,  80001b7f] {      b80} Kern   fiasco
>     >     [ 80002000,  8009ffff] {    9e000} Kern   fiasco
>     >     [ 800c0000,  800c9f6b] {     9f6c} Sigma0 sigma0
>     >     [ 800d0000,  800d6177] {     6178} Sigma0 sigma0
>     >     [ 80140000,  80169457] {    29458} Root   moe
>     >     [ 80170000,  80176ff3] {     6ff4} Root   moe
>     >     [ 81000000,  8100f5df] {     f5e0} Boot   bootstrap
>     >     [ 81100000,  81ac7fff] {   9c8000} Root   Module
>     >   API Version: (87) experimental
>     >   Sigma0 config    ip:800c0100 sp:00000000
>     >   Roottask config  ip:80140260 sp:00000000
>     >   Starting kernel fiasco at 80001374
>     > Realview System ID: Rev=1 HBI=190 Build=f Arch=5 FPGA=00
>     > Hello from Startup::stage2
>     > Per_cpu_data_alloc: (orig: 0xf008f010-0xf008f5d8)
>     > Number of IRQs available at this GIC: 160
>     > FPU0: Arch: VFPv4(4), Part: VFPv3(30), r: 0, v: f, i: 41, t: hard, p:
>     > dbl/sngl
>     > ARM generic timer: freq=62500000 interval=62500 cnt=10064946
>     > 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 4.7.3   []
>     > Build: #1 Wed Jan 20 17:27:17 CET 2016
>     >
>     > Per_cpu_data_alloc: (orig: 0xf008f010-0xf008f5d8)
>     > Allocate 1480 bytes (1KB) for CPU[9] local storage (offset=13557f0,
>     > 0xf13e4800-0xf13e4dc8)
>     > Number of CPUs: 1
>     > Per_cpu_data_alloc: (orig: 0xf008f010-0xf008f5d8)
>     > Allocate 1480 bytes (1KB) for CPU[1] local storage (offset=115b7f0,
>     > 0xf11ea800-0xf11eadc8)
>     > FPU1: Arch: VFPv4(4), Part: VFPv3(30), r: 0, v: f, i: 41, t: hard, p:
>     > dbl/sngl
>     > Per_cpu_data_alloc: (orig: 0xf008f010-0xf008f5d8)
>     > Allocate 1480 bytes (1KB) for CPU[2] local storage (offset=115eff0,
>     > 0xf11ee000-0xf11ee5c8)
>     > FPU2: Arch: VFPv4(4), Part: VFPv3(30), r: 0, v: f, i: 41, t: hard, p:
>     > dbl/sngl
>     > Cache config: ON
>     > ID_PFR[01]:  00001131 00011011 ID_[DA]FR0: 02010555 00000000
>     > ID_MMFR[04]: 10201105 20000000 01240000 02102211
>     > CPU[2]: goes to idle loop
>     > Per_cpu_data_alloc: (orig: 0xf008f010-0xf008f5d8)
>     > Allocate 1480 bytes (1KB) for CPU[3] local storage (offset=1161ff0,
>     > 0xf11f1000-0xf11f15c8)
>     > FPU3: Arch: VFPv4(4), Part: VFPv3(30), r: 0, v: f, i: 41, t: hard, p:
>     > dbl/sngl
>     > Calibrating timer loop... Cache config: ON
>     > ID_PFR[01]:  00001131 00011011 ID_[DA]FR0: 02010555 00000000
>     > ID_MMFR[04]: 10201105 20000000 01240000 02102211
>     > CPU[1]: goes to idle loop
>     > Cache config: ON
>     > ID_PFR[01]:  00001131 00011011 ID_[DA]FR0: 02010555 00000000
>     > ID_MMFR[04]: 10201105 20000000 01240000 02102211
>     > CPU[3]: goes to idle 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]
>     > [0:800a0000;800bffff]
>     > [0:800ca000;800cffff]
>     > [0:800d7000;8013ffff]
>     > [4:80140000;80169fff]
>     > [0:8016a000;8016ffff]
>     > [4:80170000;80176fff]
>     > [0:80177000;810fffff]
>     > [4:81100000;81ac7fff]
>     > [0:81ac8000;8effffff]
>     > IOMEM:----------------------
>     > [0:0;7fffffff]
>     > [0:90000000;ffffffff]
>     > MOE: Hello world
>     > MOE: found 234840 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: [81100000-811003cc] [C:105000] l4lx-net.cfg
>     >   BOOTFS: [81101000-8111a464] [C:107000] l4re
>     >   BOOTFS: [8111b000-81174694] [C:109000] ned
>     >   BOOTFS: [81175000-812e761c] [C:10b000] io
>     >   BOOTFS: [812e8000-81311624] [C:10d000] fb-drv
>     >   BOOTFS: [81312000-81343824] [C:10f000] cons
>     >   BOOTFS: [81344000-8134415e] [C:111000] l4lx-vbus.io
>     <http://l4lx-vbus.io> <http://l4lx-vbus.io>
>     >   BOOTFS: [81345000-81345447] [C:113000] arm-ve.devs
>     >   BOOTFS: [81346000-817c747c] [C:115000] vmlinuz
>     >   BOOTFS: [817c8000-81ac8000] [C:117000] ramdisk-arm.rd
>     > MOE: cmdline: moe rom/l4lx-net.cfg
>     > MOE: Starting: rom/ned rom/l4lx-net.cfg
>     > MOE: loading 'rom/ned'
>     > Ned says: Hi World!
>     > Ned: loading file: 'rom/l4lx-net.cfg'
>     > Console Server
>     > cons>
>     > Created vcon channel: IO [41f000]
>     > cons>
>     > Created vcon channel: l4linux [420000]
>     > 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/arm-ve.devs'
>     > IO      | Loading: config 'rom/l4lx-vbus.io <http://l4lx-vbus.io>
>     <http://l4lx-vbus.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      |   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      |   clcd: hid=AMBA PL110
>     > IO      |     Resources: ==== start ====
>     > IO      |     IOMEM   [00000010020000-00000010020fff 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      |   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      |   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      |   CTRL: hid=System Control
>     > IO      |     Resources: ==== start ====
>     > IO      |     IOMEM   [00000010000000-00000010000fff 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.
>     > l4linux | PH  0 (t:        1) offs=00008000 vaddr=02000000
>     vend=0252b724
>     > l4linux |                     phys=02000000 ephys=0252b724
>     > l4linux |                     f_sz=004655df memsz=0052b724 flgs=rwx
>     > l4linux | PH  1 (t:        4) offs=004077b0 vaddr=023ff7b0
>     vend=023ff7d4
>     > l4linux |                     phys=023ff7b0 ephys=023ff7d4
>     > 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 0x2001338, argc=8 argv=0xafff4f84
>     > *argv=0xb1007ff4 argv0=rom/vmlinuz
>     > l4linux | External resolver is at 0xa800079c
>     > l4linux | ======> L4Linux starting... <========
>     > l4linux | Linux version 4.3.0-l4 (nour at nour-vb) (gcc version 4.7.3
>     > (Ubuntu/Linaro 4.7.3-12ubuntu1) ) #1 SMP Wed Jan 20 17:53:39 CET 2016
>     > l4linux | Binary name: rom/vmlinuz
>     > l4linux |    This is an AEABI build.
>     > l4linux | Linux kernel command line (7 args): mem=64M console=ttyLv0
>     > l4x_rd=rom/ramdisk-arm.rd root=1:0 rw ramdisk_size=4000
>     > l4shmnet.add=shmns,macpart=1
>     > l4linux | CPU mapping (l:p)[1]: 0:0
>     > l4linux | Image: 020000a0 - 02600000 [6143 KiB].
>     > l4linux | Areas: Text:     020000a0 - 023ff7d4 [4093kB]
>     > l4linux |        RO-Data:  0233f000 - 023e2000 [652kB]
>     > l4linux |        Data:     02438000 - 02460fe0 [163kB]
>     > l4linux |        Init:     02400000 - 02438000 [224kB]
>     > l4linux |        BSS:      024655df - 0252b724 [792kB]
>     > l4linux | Device scan:
>     > l4linux |   Device: L4ICU
>     > l4linux |   Device: NIC
>     > l4linux |     IRQ: 0000003c - 0000003c
>     > l4linux |     MEM: 10030000 - 10030fff
>     > l4linux | Device scan done.
>     > l4linux | l4lx_thread_create: Created thread 41d (cpu0) (u:b3000e00,
>     > v:b3000c00, sp:02439fa4)
>     > l4linux | main thread will be 41d
>     > l4linux | section-with-init(-data): Virt: 0x2000000 to 0x252b723
>     [5293 KiB]
>     > l4linux | section-with-init(-data): Phys: 0x801a9000 to 0x806d4723,
>     > [5293 KiB]
>     > l4linux | section-with-init-text: Virt: 0x2000000 to 0x252b723
>     [5293 KiB]
>     > l4linux | section-with-init-text: Phys: 0x801a9000 to 0x806d4723,
>     [5293 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: 0x2600000 to 0x65fffff [65536 KiB]
>     > l4linux |     Main memory: Phys: 0x81c00000 to 0x85bfffff, [65536 KiB]
>     > l4linux | l4x: vmalloc area: 06600000 - 0e600000
>     > l4linux |            text: Virt: 0x2000000 to 0x252b723 [5293 KiB]
>     > l4linux |            text: Phys: 0x801a9000 to 0x806d4723, [5293 KiB]
>     > l4linux | Loading: rom/ramdisk-arm.rd
>     > l4linux | INITRD: Size of RAMdisk is 3072KiB
>     > l4linux | RAMdisk from 00002000 to 00302000 [3072KiB]
>     > l4linux | l4lx_thread_create: Created thread 423 (timer0) (u:b3000a00,
>     > v:00000000, sp:024bffa0)
>     > l4linux | Booting Linux on physical CPU 0x0
>     > l4linux | Linux version 4.3.0-l4 (nour at nour-vb) (gcc version 4.7.3
>     > (Ubuntu/Linaro 4.7.3-12ubuntu1) ) #1 SMP Wed Jan 20 17:53:39 CET 2016
>     > l4linux | CPU: Fiasco [412fc0f1] revision 1 (ARMv7), cr=00400000
>     > l4linux | CPU: PIPT / VIPT nonaliasing data cache, PIPT
>     instruction cache
>     > l4linux | Machine: L4
>     > l4linux | Ignoring unrecognised tag 0x00000000
>     > l4linux | Memory policy: Data cache writealloc
>     > l4linux | INITRD: 00002000 - 00302000
>     > l4linux | PERCPU: Embedded 9 pages/cpu @0651f000 s12864 r0 d24000
>     u36864
>     > l4linux | Built 1 zonelists in Zone order, mobility grouping on. 
>     Total
>     > pages: 17716
>     > l4linux | Kernel command line: mem=64M console=ttyLv0
>     > l4x_rd=rom/ramdisk-arm.rd root=1:0 rw ramdisk_size=4000
>     > l4shmnet.add=shmns,macpart=1
>     > l4linux | PID hash table entries: 512 (order: -1, 2048 bytes)
>     > l4linux | Dentry cache hash table entries: 16384 (order: 4, 65536
>     bytes)
>     > l4linux | Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
>     > l4linux | Memory: 64764K/71680K available (3441K kernel code, 163K
>     > rwdata, 652K rodata, 224K init, 792K bss, 6916K reserved, 0K
>     cma-reserved)
>     > l4linux | Virtual kernel memory layout:
>     > l4linux |     vector  : 0xbffff000 - 0xc0000000   (   4 kB)
>     > l4linux |     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
>     > l4linux |     vmalloc : 0x06600000 - 0x0e600000   ( 128 MB)
>     > l4linux |     lowmem  : 0x00000000 - 0x06600000   ( 102 MB)
>     > l4linux |       .text : Virtual kernel memory layout:
>     > l4linux |     vector  : 0xbffff000 - 0xc0000000   (   4 kB)
>     > l4linux |     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
>     > l4linux |     vmalloc : 0x06600000 - 0x0e600000   ( 128 MB)
>     > l4linux |     loHierarchical RCU implementation.
>     > l4linux |     Build-time adjustment of leaf fanout to 32.
>     > l4linux |     RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=1.
>     > l4linux | RCU: Adjusting geometry for rcu_fanout_leaf=32, nr_cpu_ids=1
>     > l4linux | NR_IRQS:282
>     > l4linux | clocksource: l4kipclk: mask: 0xffffffffffffffff max_cycles:
>     > 0x1d854df40, max_idle_ns: 3526361616960 ns
>     > l4linux | l4timer: Using IRQ210
>     > l4linux | sched_clock: 64 bits at 1000kHz, resolution 1000ns, wraps
>     > every 2199023255500ns
>     > l4linux | Console: colour dummy device 80x30
>     > l4linux | console [ttyLv0] enabled
>     > l4linux | Calibrating delay loop... 410.41 BogoMIPS (lpj=2052096)
>     > l4linux | pid_max: default: 32768 minimum: 301
>     > l4linux | Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
>     > l4linux | Mountpoint-cache hash table entries: 1024 (order: 0,
>     4096 bytes)
>     > l4linux | CPU: Testing write buffer coherency: ok
>     > l4linux | CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
>     > l4linux | Setting up static identity map for 0x20000a0 - 0x20000a0
>     > l4linux | Brought up 1 CPUs
>     > l4linux | SMP: Total of 1 processors activated (410.41 BogoMIPS).
>     > l4linux | CPU: All CPU(s) started in SVC mode.
>     > l4linux | VFP support v0.3: implementor 41 architecture 4 part 30
>     > variant f rev 0
>     > l4linux | clocksource: jiffies: mask: 0xffffffff max_cycles:
>     0xffffffff,
>     > max_idle_ns: 19112604462750000 ns
>     > l4linux | NET: Registered protocol family 16
>     > l4linux | DMA: preallocated 256 KiB pool for atomic coherent
>     allocations
>     > l4linux | Added static device 'L4ICU' with 0 resources.
>     > l4linux | Added static device 'NIC' with 2 resources.
>     > l4linux | l4vbus: is running
>     > l4linux | L4IRQ: set irq type of 212 to 1
>     > l4linux | l4vbus-root :l4vbus-root:0: added vbus root driver
>     > l4linux | clocksource: Switched to clocksource l4kipclk
>     > l4linux | NET: Registered protocol family 2
>     > l4linux | TCP established hash table entries: 1024 (order: 0, 4096
>     bytes)
>     > l4linux | TCP bind hash table entries: 1024 (order: 1, 8192 bytes)
>     > l4linux | TCP: Hash tables configured (established 1024 bind 1024)
>     > l4linux | UDP hash table entries: 256 (order: 1, 8192 bytes)
>     > l4linux | UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
>     > l4linux | NET: Registered protocol family 1
>     > l4linux | RPC: Registered named UNIX socket transport module.
>     > l4linux | RPC: Registered udp transport module.
>     > l4linux | RPC: Registered tcp transport module.
>     > l4linux | RPC: Registered tcp NFSv4.1 backchannel transport module.
>     > l4linux | Trying to unpack rootfs image as initramfs...
>     > l4linux | rootfs image is not initramfs (junk in compressed archive);
>     > looks like an initrd
>     > l4linux | INITRD: Freeing memory.
>     > l4linux | Hi from the sample module
>     > l4linux | sample module: Also a warm welcome to the console
>     > l4linux | l4x: Checks passed.
>     > l4linux | NetWinder Floating Point Emulator V0.97 (double precision)
>     > l4linux | futex hash table entries: 256 (order: 2, 16384 bytes)
>     > l4linux | NFS: Registering the id_resolver key type
>     > l4linux | Key type id_resolver registered
>     > l4linux | Key type id_legacy registered
>     > l4linux | jitterentropy: Initialization failed with host not compliant
>     > with requirements: 2
>     > l4linux | io scheduler noop registered
>     > l4linux | io scheduler deadline registered
>     > l4linux | io scheduler cfq registered (default)
>     > l4linux | l4fb.0: looking for capability 'fb' as goos session
>     > l4linux | l4fb.0: init failed err=-2
>     > l4linux | could not allocate fb device: fb
>     > l4linux | L4 serial driver
>     > l4linux | serial-ttyLv.0: ttyLv0 at MMIO 0x1 (irq = 211, base_baud =
>     > 230400) is a L4-vcon
>     > l4linux | l4ser_shm: L4 shared mem serial driver
>     > l4linux | l4cdds: No name given, not starting.
>     > l4linux | brd: module loaded
>     > l4linux | l4bdds: No name given, not starting.
>     > l4linux | PPP generic driver version 2.4.2
>     > l4linux | NET: Registered protocol family 24
>     > l4linux | shmns: Requesting, Shmsize 1024 Kbytes
>     > l4linux | mousedev: PS/2 mouse device common for all mice
>     > l4linux | NET: Registered protocol family 17
>     > l4linux | Key type dns_resolver registered
>     > l4linux | Registering SWP/SWPB emulation handler
>     > l4linux | L4IRQ: set irq type of 211 to 1
>     > l4linux | RAMDISK: ext2 filesystem found at block 0
>     > l4linux | RAMDISK: Loading 3072KiB [1 disk] into ram disk... done.
>     > l4linux | EXT4-fs (ram0): couldn't mount as ext3 due to feature
>     > incompatibilities
>     > l4linux | EXT4-fs (ram0): mounting ext2 file system using the ext4
>     subsystem
>     > l4linux | EXT4-fs (ram0): mounted filesystem without journal.
>     Opts: (null)
>     > l4linux | VFS: Mounted root (ext2 filesystem) on device 1:0.
>     > l4linux | Freeing unused kernel memory: 224K (02400000 - 02438000)
>     > l4linux |
>     > l4linux | Please press Enter to activate this console.
>     >
>     > However once I enter the console, ifconfig command displays no up
>     > interfaces. /proc/net/dev file indicates eth0 and lo available and
>     I can
>     > run "*ifconfig eth0 up*" successfully. I configure a static IP
>     using ip
>     > command but can't get any connection to my host machine. Also, adding
>     > *ip=dhcp* to the l4lx-net.cfg file in the start configuration of
>     L4Linux
>     > fails with:
>     >
>     > l4linux | Waiting up to 110 more seconds for network.
>     > ...
>     > l4linux | Sending DHCP requests ...... timed out!
>     > l4linux | IP-Config: Retrying forever (NFS root)...
>     >
>     > I hope you can help me with that. Thanks in advance:
>     > Best Regards,
>     > Nourhan




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