Hello,
I have to port Linux-xenomai on target Phytec PhyCARD-M iMx35 (ARM 11 core) and
I need your help.
I reconfigured the kernel from the configuration provided by Phytec :
- CONFIG_PREEMPT = y
- CONFIG_VGA_CONSOLE = n
- CONFIG_MX3_IPU = n
- CONFIG_FB_MX3 = n
- CONFIG_USB_ISP1760 = n
So, Linux-xenomai runs on the target, but I can't have pictures on the display
(the configuration of the framebuffer is not set : CONFIG_MX3_IPU and
CONFIG_FB_MX3).
I would like to enable xenomai and the framebuffer.
When I patch Linux with adeos-ipipe, disable xenomai and enable ipu (image
processing unit), the kernel doesn't start :
booting kernel of type uimage from /dev/ram0.kernel
Verifying Checksum ... OK
Image Name: Linux-2.6.35.9
Created: 2011-04-20 7:14:44 UTC
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 2446512 Bytes = 2.3 MB
Load Address: 80008000
Entry Point: 80008000
OK
commandline: console=ttymxc0,115200 video=mx3fb:Primeview-PD050VL1
ip=192.168.0.195::192.168.0.1:255.255.255.0::: root=/dev/nfs
nfsroot=192.168.0.84:/opt/francois/nfs_imx35_xenom;
arch_number: 2595
Starting kernel ...
Linux version 2.6.35.9 (francois@francois-desktop) (gcc version 4.3.2
(OSELAS.Toolchain-1.99.3) ) #2 PREEMPT Wed Apr 20 09:14:32 CEST 2011
CPU: ARMv6-compatible processor [4117b363] revision 3 (ARMv6TEJ),
cr=00c5387f
CPU: VIPT nonaliasing data cache, VIPT nonaliasing instruction c
I think there is a conflict between ipipe and ipu but I don't know why.
IPU depends on dma engine.
When I read the /proc files, I can't see IRQ conflicts nor memory conflicts.
The ipu driver consists of two C files : ipu_idmac.c and ipu_irq.c.
When I disable ipu_idma.c, I have 4 more IRQs (CONFIG_MX3_IPU_IRQS = 4) and
Linux-ipipe (and xenomai) starts but I can't have pictures on the display.
I can't debug with printk because the printk calls modify the behaviour.
Do you have any idea ?
Thank you. _______________________________________________
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