Intel Edison買いました
2014/11/03(月) 21:31 NetBSD はてブ情報 はてブに登録 はてブ数

Intel Edison買いました。

root@edison:~# uname -a
Linux edison 3.10.17-poky-edison+ #1 SMP PREEMPT Mon Sep 8 14:09:55 CEST 2014 i686 GNU/Linux
root@edison:~# mount|grep mmcblk
/dev/mmcblk0p8 on / type ext4 (rw,nodev,noatime,discard,noauto_da_alloc,data=ordered)
/dev/mmcblk0p5 on /factory type ext4 (ro,nosuid,nodev,noatime,discard,noauto_da_alloc)
/dev/mmcblk0p10 on /home type ext4 (rw,nosuid,nodev,noatime,discard,noauto_da_alloc,data=ordered)
root@edison:~# mount -t msdos /dev/mmcblk0p7 /mnt
root@edison:~# mount | grep msdos
/dev/mmcblk0p7 on /mnt type msdos (rw,relatime,fmask=0022,dmask=0022,codepage=437,errors=remount-ro)
root@edison:~# ls /mnt
ldlinux.c32   ldlinux.sys   syslinux.cfg  vmlinuz
root@edison:~# df /mnt
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/mmcblk0p7            5638      5182       456  92% /mnt
root@edison:/mnt# df -m /
Filesystem           1M-blocks      Used Available Use% Mounted on
/dev/root                  464       454         0 100% /

-Boot 2014.04 (Sep 08 2014 - 14:09:10)

       Watchdog enabled
DRAM:  980.6 MiB
MMC:   tangier_sdhci: 0
In:    serial
Out:   serial
Err:   serial
Hit any key to stop autoboot:  0
boot > help
?       - alias for 'help'
askenv  - get environment variables from stdin
base    - print or set address offset
bdinfo  - print Board Info structure
boot    - boot default, i.e., run 'bootcmd'
bootd   - boot default, i.e., run 'bootcmd'
bootelf - Boot from an ELF image in memory
bootm   - boot application image from memory
bootvx  - Boot vxWorks from an ELF image
cmp     - memory compare
coninfo - print console devices and information
cp      - memory copy
crc32   - checksum calculation
dcache  - enable or disable data cache
dfu     - Device Firmware Upgrade
echo    - echo args to console
editenv - edit environment variable
env     - environment handling commands
exit    - exit script
ext4load- load binary file from a Ext4 filesystem
ext4ls  - list files in a directory (default /)
ext4write- create a file in the root directory
false   - do nothing, unsuccessfully
fatinfo - print information about filesystem
fatload - load binary file from a dos filesystem
fatls   - list files in a directory (default /)
fatwrite- write file into a dos filesystem
gettime - get timer val elapsed,

go      - start application at address 'addr'
gpt     - GUID Partition Table
grepenv - search environment variables
hash    - compute message digest
help    - print command description/usage
icache  - enable or disable instruction cache
in      - read data from an IO port
ini     - parse an ini file in memory and merge the specified section into the env
interrupts- enable or disable interrupts
irqinfo - print information about IRQs
itest   - return true/false on integer compare
load    - load binary file from a filesystem
loadb   - load binary file over serial line (kermit mode)
loads   - load S-Record file over serial line
loadx   - load binary file over serial line (xmodem mode)
loady   - load binary file over serial line (ymodem mode)
loop    - infinite loop on address range
ls      - list files in a directory (default /)
md      - memory display
meminfo - display memory information
mm      - memory modify (auto-incrementing address)
mmc     - MMC sub system
mmcinfo - display MMC info
mw      - memory write (fill)
nm      - memory modify (constant address)
out     - write datum to IO port
part    - disk partition related commands
pci     - list and access PCI Configuration Space
printenv- print environment variables
read    - Load binary data from a partition
reginfo - print register information
reset   - Perform RESET of the CPU
run     - run commands in an environment variable
saveenv - save environment variables to persistent storage
setenv  - set environment variables
setexpr - set environment variable as the result of eval expression
sha1sum - compute SHA1 message digest
showvar - print local hushshell variables
sleep   - delay execution for some time
source  - run script from memory
test    - minimal test like /bin/sh
timer   - access the system timer
true    - do nothing, successfully
version - print monitor, compiler and linker version
zboot   - Boot bzImage
root@edison:~# dmesg | grep ttyMFD2
[    0.000000] Kernel command line: root=PARTUUID=012b3303-34ac-284d-99b4-34e03a2335f4 rootfstype=ext4 console=ttyMFD2 earlyprintk=ttyMFD2,keep loglevel=4 hardware_id=00 g_multi.iSerialNumber=c6305d42cdcc9203bf0c6a2901a70a5a
[    0.727379] 0000:00:04.3: ttyMFD2 at MMIO 0xff010180 (irq = 54) is a hsu_debug_port_p
[    0.734998] console [ttyMFD2] enabled
[    2.368030] systemd[1]: Expecting device dev-ttyMFD2.device...
boot > mm.b 0xff010180
ff010180: 00 ? 40
@ff010181: 02 ? .

boot_target_cmd=run do_flash_os;run do_probe_dfu;run do_compute_target;run mmc-bootargs;run load_kernel;zboot ${loadaddr}
load_kernel=fatload mmc 0:7 ${loadaddr} vmlinuz
MMCのパーティション7から0x100000にvmlinuzをロードし、zboot 0x100000しているようだ。

zbootはbzImage形式のファイルを処理するもののようだ。bzImage形式は、に書いてある情報を参考にすると、カーネルのbinaryイメージの前にbootsect.o, setup.oというのがくっついている形式らしい。

root@edison:/proc# head kallsyms
c1200000 T startup_32
c1200000 T _text
c12000b8 T start_cpu0
c12000c8 T _stext
c12000d0 T do_one_initcall
c1200230 t match_dev_by_uuid
c1200260 T name_to_dev_t
c12005d0 t init_linuxrc
c1200670 t set_ti_thread_flag
c1200680 T start_thread

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