- 感谢发烧友和龙芯提供的开发板。
- 拿到盒子,看见上面“龙芯中科”四个字的时候,真的感觉如梦似欢,这是中国人第一次真正拥有了一个有潜力的资助指令集。
核心板上5颗IC
扩展版上都是一些小IC
接口
排针接口
出场默认带一个系统,接上TYPE USB后,系统会自动启动,串口115200连接:
能感受到发热有点厉害,通过命令 cat /sys/class/thermal/thermal_zone0/temp 获取芯片温度 53℃
FTP只能接收小文件,大文件拉不下来(后来发现是由于百兆网的问题,但更新系统的时候不知道)
所以采用U盘的方法更新。U盘必须插入下面的USB口,上面那个USB口识别不了。
串口连接控制台,系统启动后按住m不放,会进入特殊的boot界面。
更新最新系统必须把uboot和rootfs都更新了,这是由于新rootfs的env发生改变,如果不想更新boot只能重新配置env,详细信息在镜像页。
只更新 uImage 或 rootfs.img 会启动失败:
[ 5.370759] cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
[ 5.381830] ALSA device list:
[ 5.388785] No soundcards found.
[ 5.396137] Waiting for root device /dev/mmcblk0...
[ 5.440169] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
[ 5.448908] cfg80211: failed to load regulatory.db
[ 5.453836] mmc0: new high speed MMC card at address 0001
[ 5.459953] mmcblk0: mmc0:0001 08A391 7.28 GiB
[ 5.464668] mmcblk0boot0: mmc0:0001 08A391 partition 1 4.00 MiB
[ 5.470807] mmcblk0boot1: mmc0:0001 08A391 partition 2 4.00 MiB
[ 5.482173] mmcblk0: p1
[ 5.491895] List of all partitions:
[ 5.495446] 0100 32768 ram0
[ 5.495451] (driver?)
[ 5.501618] 0101 32768 ram1
[ 5.501623] (driver?)
[ 5.507790] 0102 32768 ram2
[ 5.507795] (driver?)
[ 5.513943] 0103 32768 ram3
[ 5.513946] (driver?)
[ 5.520100] 0104 32768 ram4
[ 5.520104] (driver?)
[ 5.526253] 0105 32768 ram5
[ 5.526257] (driver?)
[ 5.532423] 0106 32768 ram6
[ 5.532426] (driver?)
[ 5.538560] 0107 32768 ram7
[ 5.538563] (driver?)
[ 5.544695] 0108 32768 ram8
[ 5.544698] (driver?)
[ 5.550829] 0109 32768 ram9
[ 5.550832] (driver?)
[ 5.556962] 010a 32768 ram10
[ 5.556966] (driver?)
[ 5.563184] 010b 32768 ram11
[ 5.563187] (driver?)
[ 5.569405] 010c 32768 ram12
[ 5.569408] (driver?)
[ 5.575646] 010d 32768 ram13
[ 5.575650] (driver?)
[ 5.581870] 010e 32768 ram14
[ 5.581873] (driver?)
[ 5.588092] 010f 32768 ram15
[ 5.588095] (driver?)
[ 5.594317] 1f00 924 mtdblock0
[ 5.594320] (driver?)
[ 5.600889] 1f01 32 mtdblock1
[ 5.600893] (driver?)
[ 5.607460] 1f02 4 mtdblock2
[ 5.607463] (driver?)
[ 5.614035] 1f03 64 mtdblock3
[ 5.614039] (driver?)
[ 5.620608] 0800 1946624 sda
[ 5.620613] driver: sd
[ 5.626746] 0801 1946592 sda1 00000000-01
[ 5.626750]
[ 5.633143] b300 7634944 mmcblk0
[ 5.633147] driver: mmcblk
[ 5.639977] b301 523264 mmcblk0p1 dca33646-01
[ 5.639980]
[ 5.646809] No filesystem could mount root, tried:
[ 5.646813] ext4
[ 5.651710]
[ 5.655137] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,0)
[ 5.663623] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,0) ]---
telnetd
telnet 《IP》
set(CMAKE_C_COMPILER "/path/loongson-gnu-toolchain-8.3-x86_64-loongarch64-linux-gnu-rc1.3-1/bin/loongarch64-linux-gnu-gcc")
set(CMAKE_CXX_COMPILER "/path/loongson-gnu-toolchain-8.3-x86_64-loongarch64-linux-gnu-rc1.3-1/bin/loongarch64-linux-gnu-g++")
编译 gdbserver
../configure \
--host=loongarch64-linux-gnu --target=loongarch64-linux-gnu \
CC=loongarch64-linux-gnu-gcc CXX=loongarch64-linux-gnu-g++ LD=loongarch64-linux-gnu-ld AR=loongarch64-linux-gnu-ar \
--disable-tui
gmp
../configure
--host=loongarch64-linux-gnu --target=loongarch64-linux-gnu \
CC=loongarch64-linux-gnu-gcc CXX=loongarch64-linux-gnu-g++ LD=loongarch64-linux-gnu-ld AR=loongarch64-linux-gnu-ar \
--prefix=./install
暂时没辙,只能之后看看编译buildroot的时候能不能整出来。
既然直接在 loongarch 运行的 gdb 编译不出来,我可以试一下编译在x86上运行的、调试loongarhc的交叉调试器。
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