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Raspberry Pi 3のRaspbian はrootfsもkernelも32bitだった

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遅ればせながらラズパイ3を入手しました。

$ cat /proc/version
Linux version 4.14.24-v7+ (dc4@dc4-XPS13-9333) (gcc version 4.9.3 (crosstool-NG crosstool-ng-1.22.0-88-g8460611)) #1097 SMP Mon Mar 5 16:42:05 GMT 2018
$ cat /proc/cpuinfo
processor   : 0
model name  : ARMv7 Processor rev 4 (v7l)
BogoMIPS    : 38.40
Features    : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part    : 0xd03
CPU revision    : 4

processor   : 1
model name  : ARMv7 Processor rev 4 (v7l)
BogoMIPS    : 38.40
Features    : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part    : 0xd03
CPU revision    : 4

processor   : 2
model name  : ARMv7 Processor rev 4 (v7l)
BogoMIPS    : 38.40
Features    : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part    : 0xd03
CPU revision    : 4

processor   : 3
model name  : ARMv7 Processor rev 4 (v7l)
BogoMIPS    : 38.40
Features    : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part    : 0xd03
CPU revision    : 4

Hardware    : BCM2835
Revision    : a02082
Serial      : 000000001910d2d7

/boot のカーネルイメージは以下の2種類しかない。kernel.img は初代Raspberry Pi用でarmv6。kernel7.img がRaspberry Pi 2用でarmv7。Raspberry Pi 3もkernel7.img で動いているようだ。

$ ls -l /boot/kernel*
-rwxr-xr-x 1 root root 4827200 Mar  6 03:26 /boot/kernel7.img
-rwxr-xr-x 1 root root 4621952 Mar  6 03:26 /boot/kernel.img

参考。Nano Pi NEO 2

Nano Pi NEO 2もCortex-A53 (64bit arm)が載っている。

$ cat /proc/version 
Linux version 4.11.2 (root@wwd) (gcc version 6.3.1 20170109 (Linaro GCC 6.3-2017.02) ) #4 SMP Wed Jul 19 17:53:37 CST 2017
$ cat /proc/cpuinfo
processor   : 0
BogoMIPS    : 48.00
Features    : fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x0
CPU part    : 0xd03
CPU revision    : 4

processor   : 1
BogoMIPS    : 48.00
Features    : fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x0
CPU part    : 0xd03
CPU revision    : 4

processor   : 2
BogoMIPS    : 48.00
Features    : fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x0
CPU part    : 0xd03
CPU revision    : 4

processor   : 3
BogoMIPS    : 48.00
Features    : fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x0
CPU part    : 0xd03
CPU revision    : 4

Hardware    : Allwinnersun50iw2Family
Revision    : 0000
Serial      : 0000000000000000

関連

Raspberry Pi 3 を64bitモードで動かすイメージをBuildrootで作る

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