linux-kernel-4.4 移植 （1）启动

概述开发环境：win10 64位 + VMware12 + Ubuntu14.04 32位 工具链：linaro提供的gcc-linaro-6.1.1-2016.08-x86_64_arm-linux-gnueabi 要移植的kernel版本：linux-4.4 Tiny4412开发板硬件版本为：   底板：  Tiny4412SDK 1312B   核心板：Tiny4412 - 1306   1、下 开发环境：win10 64位 + VMware12 + Ubuntu14.04 32位 工具链：linaro提供的gcc-linaro-6.1.1-2016.08-x86_64_arm-linux-gnueabi 要移植的kernel版本：linux-4.4 Tiny4412开发板硬件版本为：   底板：  Tiny4412SDK 1312B   核心板：Tiny4412 - 1306   1、下载、解压内核

linux-4.4.tar.gz 

2、配置 　　1）配置开发板类型及指定交叉编译链

diff --git a/arch/arm/boot/dts/exynos4412-tiny4412.dts b/arch/arm/boot/dts/exynoindex 4840bbd..048ae67 100644--- a/arch/arm/boot/dts/exynos4412-tiny4412.dts+++ b/arch/arm/boot/dts/exynos4412-tiny4412.dts@@ -21,6 +21,7 @@  ESCODindex 70dea02..42b0d63 100644--- a/Makefile+++ b/Makefile@@ -248,8 +248,11 @@ SUbarCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_6 # "make" in the configured kernel build directory always uses that. # Default value for CROSS_COMPILE is not to prefix executables # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile-ARCH           ?= $(SUbarCH)-CROSS_COMPILE  ?= $(CONfig_CROSS_COMPILE:"%"=%)+#ARCH          ?= $(SUbarCH)+#CROSS_COMPILE ?= $(CONfig_CROSS_COMPILE:"%"=%)++ARCH           ?= arm+CROSS_COMPILE  ?= /usr/local/ARM-toolchian/gcc-linaro-6.1.1-2016.08-i686_arm-linux-gnueabi/bin/arm-linux-gnueabi-  # Architecture as present in compile.h UTS_MACHINE    := $(ARCH)

　　

　　2）修改设备树

diff --git a/arch/arm/boot/dts/exynos4412-tiny4412.dts b/arch/arm/boot/dts/exynoindex 4840bbd..048ae67 100644--- a/arch/arm/boot/dts/exynos4412-tiny4412.dts+++ b/arch/arm/boot/dts/exynos4412-tiny4412.dts@@ -21,6 +21,7 @@         chosen {                stdout-path = &serial_0;+        bootargs="root=/dev/ram0 rw rootfstype=ext4 console=ttySAC0,115200 init=/linuxrc earlyprintk";

        };         memory {@@ -78,7 +79,8 @@        bus-wIDth = <4>;        pinctrl-0 = <&sd2_clk &sd2_cmd &sd2_cd &sd2_bus4>;        pinctrl-names = "default";-       status = "okay";+   /* status = "okay";*/+    status = "Disabled"; };  &serial_0 {

3,配置内核支持Ramdisk

make menuconfig

file systems --->;

    <*> Second extended fs support

Device Drivers

    SCSI device support --->;

        <*> SCSI disk support

    Block devices --->;

        <*>RAM block device support

        (16)Default number of RAM disks

        (8192) Default RAM disk size (kbytes) (修改为8M)

General setup --->;

    [*] Initial RAM filesystem and RAM disk (initramfs/initrd) support

这个exynos的默认配置就已经支持了。

4.配置内核支持Tmpfs

$ make menuconfig

file systems --->;

   Pseudo filesystems --->

        [*] Virtual memory file system support (former shm fs)

        [*] Tmpfs POSIX Access Control Lists
这个exynos的默认配置也已经支持了。

5.编译内核

[email protected]:/home/arm/linux-4.4# cat build.sh #!/bin/bashecho "---------------"echo "rm ./ uImage and dtb"rm uImage exynos4412-tiny4412.dtbecho "make"make uImage LOADADDR=0x40007000 -j4echo "make dtb"make dtbsecho "backup config"cp .config tiny4412_defconfigecho "copy uImage"cp arch/arm/boot/uImage ./echo "copy dtb"cp arch/arm/boot/dts/exynos4412-tiny4412.dtb ./echo "over"

编写脚本。执行，烧写

即可初步启动kernel

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问题：启动后如果显示文件太多会出现

dma-pl330 12680000.pdma: reset Channel-1 CS-20000f FTC-20000
[ 1573.447654] dma-pl330 12680000.pdma: reset Channel-1 CS-20000f FTC-20000

参考：https://blog.csdn.net/sinat_20006769/article/details/79060779

说是DMA驱动的问题，按照介绍取消dma-pl330后，kernel无法启动

参考：https://blog.csdn.net/hyyoxhk/article/details/83305367

修改arch/arm/boot/dts/exynos4412-tiny4412.dts中，serial_0的dmas导致卡死，serial_2的dmas无效果

参考：https://blog.csdn.net/qq_25370227/article/details/84891632

是uboot中TrustZone造成，目前未尝试

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整体参考：

https://www.cnblogs.com/pengdonglin137/p/5143516.HTML

https://blog.csdn.net/sinat_20006769/column/info/19139

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