Re: [Xenomai] Compiling I-pipe patched kernel on beaglebone from Angstrom branch

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

On 11/23/2012 10:45 AM, WONG Sheng Chao wrote:
> Hi
> 
> I am trying to get Xenomai working on the beaglebone (AM3359) and I had 
> been following the instructions from this mailing list
> 
> http://www.xenomai.org/pipermail/xenomai/2012-September/026190.html
> 
> The steps that I went through was such
> 
> 1) I configured the Angstorm distribution with linux kernel 3.2.21 for 
> beaglebone using bitbake
> 
> 2) Copied the kernel source from it and saved it as 
> {original_angstrom_kernel}
> 
> 3) I then ran the patch script from xenomai-2.6.1
> 
> $./prepare-kernel.sh --linux={original_angstrom_kernel} --arch=arm 
> --adeos=/xenomai-2.6.1/ksrc/arch/arm/patches/ipipe-core-3.2.21-arm-1.patch
> 
> 4) There were four conflicting files, namely
> 
> arch/arm/common/gic.c
> arch/arm/mach-omap2/irq.c
> arch/arm/plat-mxc/gic.c
> arch/arm/plat-omap/include/plat/irqs.h
> 
> 5) I compared these four files to the vanilla linux-kernel-3.2.21 and 
> patch these 4 files individually from {original_angstrom_kernel} with 
> {vanilla-kernel-3.2.21}. Now i save the newly patched kernel source as 
> {pre_patched_original_angstrom_kernel}
> 
> 6) I ran the prepare-kernel script again with the --linux directed to 
> the {pre_patched_original_angstrom_kernel} and the patch went through 
> fine. So now i have a copy of i-pipe patched source 
> {ipipe_patched_original_angstrom_kernel}
> 
> 7) I proceed with copying the .config function from 
> arch/arm/configs/omap2plus_defconfig and run the make menuconfig with
> 
> $make ARCH=arm CROSS_COMPILE=arm-angstrom-linux-gnueabi- menuconfig
> 
> and save the kernel configuration
> 
> 8) i then proceed to compile the kernel with the following command
> 
> $make ARCH=arm CROSS_COMPILE=arm-angstrom-linux-gnueabi- uImage
> 
> 9) The compilation fails and it gives the following error
> 
>   arch/arm/mach-omap2/devices.c:1096:12: error: 'AM33XX_IRQ_ICSS0_0' 
> undeclared here (not in a function)
> | arch/arm/mach-omap2/devices.c:1101:12: error: 'AM33XX_IRQ_ICSS0_1' 
> undeclared here (not in a function)
> | arch/arm/mach-omap2/devices.c:1106:12: error: 'AM33XX_IRQ_ICSS0_2' 
> undeclared here (not in a function)
> | arch/arm/mach-omap2/devices.c:1111:12: error: 'AM33XX_IRQ_ICSS0_3' 
> undeclared here (not in a function)
> | arch/arm/mach-omap2/devices.c:1116:12: error: 'AM33XX_IRQ_ICSS0_4' 
> undeclared here (not in a function)
> | arch/arm/mach-omap2/devices.c:1121:12: error: 'AM33XX_IRQ_ICSS0_5' 
> undeclared here (not in a function)
> | arch/arm/mach-omap2/devices.c:1126:12: error: 'AM33XX_IRQ_ICSS0_6' 
> undeclared here (not in a function)
> | arch/arm/mach-omap2/devices.c:1131:12: error: 'AM33XX_IRQ_ICSS0_7' 
> undeclared here (not in a function)
> | arch/arm/mach-omap2/devices.c:1260:12: error: 'AM33XX_IRQ_CPSW_C0_RX' 
> undeclared here (not in a function)
> | arch/arm/mach-omap2/devices.c:1260:3: error: initializer element is 
> not constant
> | arch/arm/mach-omap2/devices.c:1260:3: error: (near initialization for 
> 'am33xx_cpsw_resources[2].start')
> | arch/arm/mach-omap2/devices.c:1261:3: error: initializer element is 
> not constant
> | arch/arm/mach-omap2/devices.c:1261:3: error: (near initialization for 
> 'am33xx_cpsw_resources[2].end')
> | arch/arm/mach-omap2/devices.c:1265:12: error: 'AM33XX_IRQ_DMTIMER5' 
> undeclared here (not in a function)
> | arch/arm/mach-omap2/devices.c:1265:3: error: initializer element is 
> not constant
> | arch/arm/mach-omap2/devices.c:1265:3: error: (near initialization for 
> 'am33xx_cpsw_resources[3].start')
> | arch/arm/mach-omap2/devices.c:1266:3: error: initializer element is 
> not constant
> | arch/arm/mach-omap2/devices.c:1266:3: error: (near initialization for 
> 'am33xx_cpsw_resources[3].end')
> | arch/arm/mach-omap2/devices.c:1270:12: error: 'AM33XX_IRQ_DMTIMER6' 
> undeclared here (not in a function)
> | arch/arm/mach-omap2/devices.c:1270:3: error: initializer element is 
> not constant
> | arch/arm/mach-omap2/devices.c:1270:3: error: (near initialization for 
> 'am33xx_cpsw_resources[4].start')
> | arch/arm/mach-omap2/devices.c:1271:3: error: initializer element is 
> not constant
> | arch/arm/mach-omap2/devices.c:1271:3: error: (near initialization for 
> 'am33xx_cpsw_resources[4].end')
> | arch/arm/mach-omap2/devices.c:1275:12: error: 'AM33XX_IRQ_CPSW_C0' 
> undeclared here (not in a function)
> | arch/arm/mach-omap2/devices.c:1275:3: error: initializer element is 
> not constant
> | arch/arm/mach-omap2/devices.c:1275:3: error: (near initialization for 
> 'am33xx_cpsw_resources[5].start')
> | arch/arm/mach-omap2/devices.c:1276:3: error: initializer element is 
> not constant
> | arch/arm/mach-omap2/devices.c:1276:3: error: (near initialization for 
> 'am33xx_cpsw_resources[5].end')
> 
> I read from this link 
> http://www.xenomai.org/pipermail/xenomai/2012-July/000476.html that for 
> the kernel to boot properly on the AM3359 two changes needs to be made. 
> I had yet to made these changes as i want to see if the kernel source 
> would compiled and to verify my steps.
> 
> Is my approach correct? Any advice on how to solve this problem?

There is no correct approach, there is more than one way to do it. Does
the un-patched kernel compile with the .config you use? If yes, does the
patched kernel compile with CONFIG_IPIPE and CONFIG_XENOMAI disabled?

-- 
					    Gilles.