[BPI-R2] Kernel Development

frank-w · October 18, 2019, 12:49pm

i’m not that expert as it may look i also did the first steps with 4.14 and without good documentation it was a stony way

spikerguy · October 18, 2019, 5:12pm

Thanks. Its compiling since last 2 and half hours now on R2 itself.

frank-w · October 18, 2019, 6:02pm

that’s long…qemu was not working?

spikerguy · October 18, 2019, 6:06pm

Qemu is slower for my laptop. and it failed.

  CC [M]  net/netfilter/xt_iprange.mod.o
multiple (or no) load addresses: 
This is incompatible with uImages
Specify LOADADDR on the commandline to build an uImage
make[1]: *** [arch/arm/boot/Makefile:90: arch/arm/boot/uImage] Error 1
make: *** [arch/arm/Makefile:340: uImage] Error 2
make: *** Waiting for unfinished jobs....
  CC [M]  net/netfilter/xt_ipvs.mod.o
  CC [M]  net/netfilter/xt_limit.mod.o

Any advice?

frank-w · October 18, 2019, 6:21pm

As error message says you need LOADADDR

Imho it is needed for uimage target,i do this manually in my build.sh

github.com

frank-w/BPI-R2-4.14/blob/1cc6598476c9f08e4a63bf99309ead039f7de6a2/build.sh#L439


			#how to create zImage?? make zImage does not work here
			mkimage -A arm -O linux -T kernel -C none -a 40080000 -e 40080000 -n "Linux Kernel $kernver$gitbranch" -d arch/arm64/boot/Image ./uImage
			if (( $(echo "$boardversion < $r64newswver" |bc -l) ));then
				cp arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dtb $board.dtb
			else
				cp arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64-mt7531.dtb $board.dtb
			fi
		else
			if [[ $ret == 0 ]]; then
				cat arch/arm/boot/zImage arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dtb > arch/arm/boot/zImage-dtb
				mkimage -A arm -O linux -T kernel -C none -a 80008000 -e 80008000 -n "Linux Kernel $kernver$gitbranch" -d arch/arm/boot/zImage-dtb ./uImage


				echo "build uImage without appended DTB..."
				export DTC_FLAGS=-@
				make ${CFLAGS} CONFIG_ARM_APPENDED_DTB=n &>/dev/null #output/errors can be ignored because they are printed before
				ret=$?
				if [[ $ret == 0 ]]; then
					cp arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dtb $board.dtb
					mkimage -A arm -O linux -T kernel -C none -a 80008000 -e 80008000 -n "Linux Kernel $kernver$gitbranch" -d arch/arm/boot/zImage ./uImage_nodt
				fi
			fi

But official repo uses uimage_loadaddr

github.com

BPI-SINOVOIP/BPI-R2-bsp/blob/591910e127cd9c811fe9e811ddb6c7278d8ed934/Makefile#L52


	$(Q)$(MAKE) -C u-boot-mt all CROSS_COMPILE=$(U_CROSS_COMPILE) -j$J


u-boot-clean:
	$(Q)$(MAKE) -C u-boot-mt CROSS_COMPILE=$(U_CROSS_COMPILE) -j$J distclean


## linux
$(K_DOT_CONFIG): linux-mt
	$(Q)$(MAKE) -C linux-mt ARCH=arm $(KERNEL_CONFIG)


kernel: $(K_DOT_CONFIG)
	$(Q)$(MAKE) -C linux-mt ARCH=arm CROSS_COMPILE=${K_CROSS_COMPILE} -j$J INSTALL_MOD_PATH=output UIMAGE_LOADADDR=0x80008000 uImage dtbs
	$(Q)$(MAKE) -C linux-mt ARCH=arm CROSS_COMPILE=${K_CROSS_COMPILE} -j$J INSTALL_MOD_PATH=output modules
	$(Q)$(MAKE) -C linux-mt ARCH=arm CROSS_COMPILE=${K_CROSS_COMPILE} -j$J INSTALL_MOD_PATH=output modules_install
	mkdir $(OUTPUT_DIR)/lib/modules/4.4.70-BPI-R2-Kernel/kernel/extra
	$(Q)$(MAKE) -C phoenix/system/src/drivers ARCH=arm CROSS_COMPILE=${K_CROSS_COMPILE} TARGET_KDIR=$(TARGET_KDIR) -j$J INSTALL_MOD_PATH=output
	$(Q)$(MAKE) -C phoenix/system/src/drivers ARCH=arm CROSS_COMPILE=${K_CROSS_COMPILE} TARGET_KDIR=$(TARGET_KDIR) -j$J INSTALL_MOD_PATH=output install
	$(Q)$(MAKE) -C linux-mt ARCH=arm CROSS_COMPILE=${K_CROSS_COMPILE} -j$J INSTALL_MOD_PATH=output _depmod
#	$(Q)$(MAKE) -C linux-mt ARCH=arm CROSS_COMPILE=${K_CROSS_COMPILE} -j$J headers_install


kernel-clean:
	$(Q)$(MAKE) -C linux-mt ARCH=arm CROSS_COMPILE=${K_CROSS_COMPILE} -j$J distclean

spikerguy · October 18, 2019, 6:23pm

Can you please advice where should I add this ?

frank-w · October 18, 2019, 6:25pm

make UIMAGE_LOADADDR=0x80008000 uImage dtbs

Instead of

make uImage dtbs

And try to use multithreading with -j8 (adjust 8 to number of virtual cores)

spikerguy · October 18, 2019, 6:27pm

But R2 is only 4 core and I am not aware of -j8 as virtual core

frank-w · October 18, 2019, 6:29pm

Then -j4

I meant on your laptop…don’t know if you need to enable multiple cores in your spawn session

Also you should take a look on read/write-speed

Maybe you should use ccache and/or ssd as underlaying storage

spikerguy · October 18, 2019, 6:31pm

Yes it always follows the host makepkg.conf

trying make ${MAKEFLAGS} UIMAGE_LOADADDR=0x80008000 uImage modules dtbs Thanks

frank-w · October 18, 2019, 6:50pm

What is output of

grep ^processor /proc/cpuinfo  | wc -l

?

spikerguy · October 19, 2019, 9:56am

4 only. As I have an old laptop.

Well the package compiled fine. Now have to test it on a built. So approx time on R2 with -j4 is 2 - 3hrs with active cooling. Which is not bad.

UPDATE: Installing the Kernel failed with this following error.

1/2) Arming ConditionNeedsUpdate...
/lib/ld-linux-armhf.so.3: No such file or directory
error: command failed to execute correctly
(2/2) Updating linux-bpir2-5.4.0-0.1 module dependencies...
/lib/ld-linux-armhf.so.3: No such file or directory
error: command failed to execute correctly

Do you think it is compiling error ? or something to do from my PKGBUILD script?

frank-w · October 19, 2019, 11:02am

Have you defined it somewhere? Maybe this is from crosscompiler and not available on your system.

I have this file on r2 as part of libc6

[12:58] frank@bpi-r2-e:~$ dpkg -S /lib/ld-linux-armhf.so.3
libc6:armhf: /lib/ld-linux-armhf.so.3

spikerguy · October 19, 2019, 11:27am

Yes It is there Before I install the Package I built and also there is a conflict, So I assume there is something I need to check in my Package

I need to refer to PKGBUILD from other device kernels to check. Till then Can you share a pre-compiled version of your 5.4-wifi branch, So I can try it manually.

frank-w · October 19, 2019, 1:59pm

I’ll upload version when i’m at home in some hours

https://drive.google.com/open?id=1WnmFOaHjXp8oSYinGaL7khKlA4l21Dmc

spikerguy · October 20, 2019, 6:28am

Hello, Thanks for the file. Difference between HDMI and WIFI files ?

frank-w · October 20, 2019, 6:29am

Hdmi has hdmi/fbdev-driver+config (usage of hdmi-port) and wifi the internal wifi-driver

spikerguy · October 20, 2019, 6:31am

Lol I Got that But does wifi have hdmi/fbdev also ?

frank-w · October 20, 2019, 6:40am

No one each…these are feature branches to work on each feature alone

spikerguy · October 20, 2019, 6:41am

So If I use Wifi version then I can only use device over UART or SSH. Is this correct ?