Difference between revisions of "Rockchip Kernel"
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Then you can get Image/zImage and dtb file. | Then you can get Image/zImage and dtb file. | ||
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= Install Boot/kernel = | = Install Boot/kernel = | ||
We use distro boot in U-Boot, so we need to make a boot partition for U-Boot with kernel image and dtb inside. | We use distro boot in U-Boot, so we need to make a boot partition for U-Boot with kernel image and dtb inside. | ||
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<pre>mkdir boot | <pre>mkdir boot | ||
cp arch/arm64/boot/dts/rockchip/rockchip/rk3399-evb.dtb boot/rk3399.dtb | cp arch/arm64/boot/dts/rockchip/rockchip/rk3399-evb.dtb boot/rk3399.dtb | ||
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Pls reference to [[Partitions|rockchip Linux parttion definition]] for rootfs partition and where boot to flash. | Pls reference to [[Partitions|rockchip Linux parttion definition]] for rootfs partition and where boot to flash. | ||
| − | After all these file prepare complete, we | + | After all these file prepare complete, we write the file to the boot partition |
| + | |||
| + | == Generate ext2fs boot partition == | ||
| + | |||
| + | by genext2fs: | ||
<pre>genext2fs -b 32768 -B $((32*1024*1024/32768)) -d boot/ -i 8192 -U boot_rk3399.img</pre> | <pre>genext2fs -b 32768 -B $((32*1024*1024/32768)) -d boot/ -i 8192 -U boot_rk3399.img</pre> | ||
According to Rockchip partition definition, you need to flash this image to boot partiton which offset is 0x8000. | According to Rockchip partition definition, you need to flash this image to boot partiton which offset is 0x8000. | ||
| + | |||
| + | dd this image to sd card, see [[sd_boot]], | ||
| + | |||
| + | or write to emmc with rkdeveloptool, see [[emmc_boot]]. | ||
| + | |||
| + | == generate fatfs boot partition == | ||
| + | |||
| + | After flash and boot the U-Boot, write the gpt table from default partition table | ||
| + | <pre>gpt write mmc 1 $partitions | ||
| + | gpt verify mmc 1 $partitions</pre> | ||
| + | |||
| + | connect target to PC and start the ums in command line: | ||
| + | <pre>ums 0 mmc 1:6</pre> | ||
| + | |||
| + | We should able to see a device connect to PC, formate and copy data into the partition(dev/sdb6 for example). | ||
| + | <pre>sudo mkfs.fat /dev/sdb6 | ||
| + | cp -r boot/* /media/machine/9F35-9565/</pre> | ||
| + | |||
| + | | ||
Revision as of 14:12, 15 March 2017
Contents
Download Kernel
You can clone the rockchip kernel repository from github which is kernel 4.4 based:
git clone https://github.com/rockchip-linux/kernel.git
Supported SoCs and Devices
Rockchip kernel 4.4 supports:
RK3036, RK3066, RK312X, RK3188, RK322X, RK3288, RK3328, RK3368, RK3399
Configure and Build
You will need to use rockchip_linux_defconfig for Linux OS
configure for armv7:
make rockchip_linux_defcofig
configure for aarch64:
make ARCH=arm64 rockchip_linux_defconfig
After configure, you need to decide which board to use, get the dts file name, and replace its postfix to img in make command,
For armv7:
make rk3288-firefly.img -j8
For aarch64:
make ARCH=arm64 rk3399-evb.img -j8
Then you can get Image/zImage and dtb file.
Install Boot/kernel
We use distro boot in U-Boot, so we need to make a boot partition for U-Boot with kernel image and dtb inside.
mkdir boot cp arch/arm64/boot/dts/rockchip/rockchip/rk3399-evb.dtb boot/rk3399.dtb cp arch/arm64/boot/Image boot/
Add extlinux/extlinux.conf for distro boot.
mkdir boot/extlinux vi boot/extlinux/extlinux.conf
lable rockchip-kernel-4.4
kernel /Image
fdt /rk3399.dtb
append earlycon=uart8250,mmio,0xff1a0000 root=dev/mmcblk1p7 rootwait rootfstype=ext4 init=/sbin/init
You need to change the base address of debug UART, root partition for your board.
Pls reference to rockchip Linux parttion definition for rootfs partition and where boot to flash.
After all these file prepare complete, we write the file to the boot partition
Generate ext2fs boot partition
by genext2fs:
genext2fs -b 32768 -B $((32*1024*1024/32768)) -d boot/ -i 8192 -U boot_rk3399.img
According to Rockchip partition definition, you need to flash this image to boot partiton which offset is 0x8000.
dd this image to sd card, see sd_boot,
or write to emmc with rkdeveloptool, see emmc_boot.
generate fatfs boot partition
After flash and boot the U-Boot, write the gpt table from default partition table
gpt write mmc 1 $partitions gpt verify mmc 1 $partitions
connect target to PC and start the ums in command line:
ums 0 mmc 1:6
We should able to see a device connect to PC, formate and copy data into the partition(dev/sdb6 for example).
sudo mkfs.fat /dev/sdb6 cp -r boot/* /media/machine/9F35-9565/
