Altera SoC 内核更新3.7到3.10

为什么需要更新呢？其实是为了更好的搭建自己的开发环境，同时熟悉altera对代码的更新和管理方式，便于进一步的熟悉和了解altera SoC开发过程。

1、下载linux代码：

1. git clone git://git.rocketboards.org/linux-socfpga.git

2、进入代码路径：

1. cd linux-socfpga

3、查看远程分支有哪些版本

1. git branch -r

可以看到有很多的版本，我选择了socfpga-3.10

1. [email protected]:~/altera/linux-src/linux-socfpga$ git branch -r
2. origin/HEAD -> origin/master
3. origin/master
4. origin/socfpga-3.10
5. origin/socfpga-3.10-ltsi
6. origin/socfpga-3.10-ltsi-rt
7. origin/socfpga-3.11
8. origin/socfpga-3.12
9. origin/socfpga-3.13
10. origin/socfpga-3.13-rel14.0
11. origin/socfpga-3.14
12. origin/socfpga-3.15
13. origin/socfpga-3.16
14. origin/socfpga-3.17
15. origin/socfpga-3.4-ltsi
16. origin/socfpga-3.6
17. origin/socfpga-3.7
18. origin/socfpga-3.7-ghrd
19. origin/socfpga-3.8
20. origin/socfpga-3.9
21. origin/socfpga-3.9-rel
22. origin/socfpga-3.9-rel-amp

4、获取Linux3.10代码：

1. git checkout -t -b socfpga-3.10 origin/socfpga-3.10

5、指定交叉编译环境路径

1. export CROSS_COMPILE=/tool/gcc-linaro-arm-linux-gnueabihf-4.8-2013.10_linux/bin/arm-linux-gnueabihf-

6、编译linux，生成zImage

1. make ARCH=arm socfpga_defconfig
2. make ARCH=arm zImage

编译完成以后，可以看到以下信息

1. ......... ...........................................................

7、替换SD卡中的zImage文件

8、上电运行，可看到以下信息

Booting Linux on physical CPU 0x0

Initializing cgroup subsys cpuset

Linux version 3.10.0-00208-gc29c849 ([email protected]) (gcc version 4.7.3 20130226 (prerelease) (crosstool-NG linaro-1.13.1-4.7-2013.03-20130313 - Linaro GCC 2013.03) ) #3 SMP Mon Feb 23 17:12:46 CST 2015

CPU: ARMv7 Processor [413fc090] revision 0 (ARMv7), cr=10c5387d

CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache

Machine model: Altera SOCFPGA Cyclone V

Truncating RAM at 0x00000000-0x40000000 to -0x2f800000

Memory policy: Data cache writealloc

PERCPU: Embedded 8 pages/cpu @ef1e4000 s11008 r8192 d13568 u32768

Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 193040

Kernel command line: console=ttyS0,115200 root=/dev/mmcblk0p2 rw rootwait fbmode=VGA

PID hash table entries: 4096 (order: 2, 16384 bytes)

Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)

Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)

Memory: 763272K/778240K available (5567K kernel code, 267K rwdata, 1516K rodata, 390K init, 134K bss, 14968K reserved)

至此3.10系统已经可以顺利运行啦