'embeded' 카테고리의 글 목록 (117 Page)

'embeded'에 해당되는 글 1387건

지름 도착 (0)	2015.04.21
아 일단 질러 ㅋㅋㅋ (2)	2015.04.20
라즈베리 파이 2 ir receiver 조사하기.. (0)	2015.04.18
initramfs 조사 (0)	2015.04.17
라즈베리 파이 2 커널모듈 빌드 (0)	2015.04.16

라즈베리 파이 2 ir receiver 조사하기..

GPIO 18번 PCM_CLK 라는 부분에 IR 리시버의 출력을 연결하면 된다는데

일단 전압은 3V 짜리로 구해야 할 것으로 보인다.

[링크 : http://ozzmaker.com/2013/10/24/how-to-control-the-gpio-on-a-raspberry-pi-with-an-ir-remote/]

핀헤더를 보니.. PCM_CLK와 PCM_DOUT 이라는게 있는데

PCM_CLK 나 GPIO나 SPI1_CE0 혹은 PWM으로 쓸 수 있다고 되어 있다.

그런데 대개.. PWM은 Output 아니었나...?

[링크 : http://elinux.org/RPi_Low-level_peripherals]

GPIO18번의 사용가능한 기능

그나저나.. PCM_DIN이 있긴한데.. 느낌으로 봐서는 PCM_DIN/PCM_DOUT으로 I2S 쪽인거 같기도 하고?

GPIO voltage levels are 3.3 V and are not 5 V tolerant. There is no over-voltage protection on the board - the intention is that people interested in serious interfacing will use an external board with buffers, level conversion and analog I/O rather than soldering directly onto the main board.

[링크 : http://elinux.org/RPi_BCM2835_GPIOs]

[링크 : https://sites.google.com/site/semilleroadt/raspberry-pi-tutorials/gpio]

GPIO는 5V 를 버틸수가 없다!!! level shift 를 하던가 그 부품을 쓰던가 -_ㅠ

레벨 시프트 칩 회로 구성하기 귀찮... -_ㅠ

귀찮으면.. 이걸 그냥 사면되는데 << 걍 이거 사야 할 듯..

[링크 : http://www.devicemart.co.kr/1077127] NulSom Inc. NS-GPIO-04 8200원/VAT별도

[링크 : http://www.vishay.com/docs/82491/tsop382.pdf]

특가로 개당 350원짜리가 있는데 이건.. 5V 다

음. GPIO에 보호회로가 없는데 브로드컴 칩이 5V를 GPIO로 받을수 있으려나 -ㅁ-? >> 3.3V GPIO 톨러런스...

[링크 : http://www.devicemart.co.kr/38921]

39khz 대신 33khz로 찾았는데

이녀석도.. 일단은.. 4.5~5.5V -_ㅠ

[링크 : http://www.devicemart.co.kr/6787]

시간이 걸려도 그냥 개당 1000원인데 이걸 살까 -_-

[링크 : http://eleparts.co.kr/EPX6DV7R]

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아 일단 질러 ㅋㅋㅋ (2)	2015.04.20
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라즈베리 파이 2 커널 바꿔치기.. 실패 ㅠㅠ (0)	2015.04.14

Posted by 구차니

또 다른 선택.. Odroid C1

라즈베리 사고 나서는 아니고 알고는 있었는데

조금 비싼 느낌이라 패스 했거늘..

라즈베리 2랑 비교하면 꽤 장점이 있는데..

1. IR 리시버 장착(!!!)

2. eMMC 장착가능

3. GbE 지원(!!!)

4. USB Host 4 + OTG 1

단, 단점으로는

1. mini HDMI

2. 별도의 전원 커넥터(micro USB로 전원공급 못함)

정도인듯..

하.. eMMC에 급 끌리네 ㅠㅠ

[링크 : http://www.hardkernel.com/main/products/prdt_info.php?g_code=G141578608433]

한줄요약 : 하드커널사에서 가격도 라즈베리2랑 동일하게 맞춘 대체제이나 일장일단이 있음

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odroid eMMC 관련 (0)	2015.11.03
odroid (0)	2014.05.21

Posted by 구차니

initramfs 조사

커널에서 어떻게 설정하고 어떻게 해야 하나...

[링크 : http://elinux.org/RPiconfig]

[링크 : https://wiki.gentoo.org/wiki/Initramfs/HOWTO/ko]

[링크 : http://www.linuxfromscratch.org/blfs/view/svn/postlfs/initramfs.html]

[링크 : http://en.wikipedia.org/wiki/Initramfs]

2010/09/19 - [Linux] - mkinitramfs

'embeded > raspberry pi' 카테고리의 다른 글

ir bpf ? (0)	2015.04.18
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라즈베리 파이 2 커널 바꿔치기.. 실패 ㅠㅠ (0)	2015.04.14
라즈베리 파이 2 - RootFS in linux (0)	2015.04.14

Posted by 구차니

라즈베리 파이 2 커널모듈 빌드

디렉토리 구조

linux 와 target_fs(rootfs) 그리고 tools는 git로 받고

modules는 linux 커널 모듈을 내려받기 위해서 빈 디렉토리로 생성한다.

~/rasp$ tree -L 2

.

├── linux

├── modules

├── target_fs

└── tools

├── arm-bcm2708

├── configs

├── mkimage

├── pkg

├── sysidk

├── test_code

└── usbboot

일단.. modules 디렉토리 없이 그냥 하니 /lib 로 타겟이 아닌 호스트에 바로 복사하려는 만행을 벌이는데!!

$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- modules_install

scripts/kconfig/conf --silentoldconfig Kconfig

mkdir: `/lib/modules/3.18.10-v7+' 디렉토리를 만들 수 없습니다: 허가 거부

make: *** [_modinst_] 오류 1

~/rasp/tools/mkimage$ ./imagetool-uncompressed.py ../../linux/arch/arm/boot/zImage

[링크 : http://sysprogs.com/VisualKernel/tutorials/raspberry/buildkernel/]

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Posted by 구차니

라즈베리 파이 2 커널 바꿔치기.. 실패 ㅠㅠ

snappy SD 카드에

kernel.img를 바꾸니 무한 재부팅 -_ㅠ

config.txt에

kernel=kernel.img

이런식으로 넣으니 그냥 깜깜 무소식 -_-

[링크 : http://elinux.org/Raspberry_Pi_Kernel_Compilation]

[링크 : https://www.raspberrypi.org/documentation/linux/kernel/building.md]

+

음... make modules_install을 안해주고 해서 그런가?

ARCH=arm CROSS_COMPILE=${CCPREFIX} INSTALL_MOD_PATH=../modules make modules_install

[링크 : http://sysprogs.com/VisualKernel/tutorials/raspberry/buildkernel/]

+

2015.04.16 추가

시리얼 연결해서 머가 문제인지 확인

일단.. snappy의 경우 kernel.img는 바꾸어도 차이가 없고

kernel7.img를 바꾸어야 변화가 생긴다. 아마도 kernel7.img가 ARMv7용인듯 하다.

Uncompressing Linux... done, booting the kernel.

[ 0.000000] Booting Linux on physical CPU 0xf00

[ 0.000000] Initializing cgroup subsys cpu

[ 0.000000] Initializing cgroup subsys cpuacct

[ 0.000000] Linux version 3.18.10-v7+ (minimonk@devdesk) (gcc version 4.8.3 20140106 (prerelease) (crosstool-NG linaro-1.13.1-4.8-2014.01 - Linaro GCC 2013.11) ) #2 SMP PREEMPT Tue Apr 14 21:12:23 KST 2015

[ 0.000000] CPU: ARMv7 Processor [410fc075] revision 5 (ARMv7), cr=10c5387d

[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache

[ 0.000000] Machine: BCM2709

[ 0.000000] cma: Reserved 8 MiB at 0x39800000

[ 0.000000] Memory policy: Data cache writealloc

[ 0.000000] [bcm2709_smp_init_cpus] enter (8600->f3003010)

[ 0.000000] [bcm2709_smp_init_cpus] ncores=4

[ 0.000000] PERCPU: Embedded 10 pages/cpu @ba369000 s11456 r8192 d21312 u40960

[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 239776

[ 0.000000] Kernel command line: dma.dmachans=0x7f35 bcm2708_fb.fbwidth=1600 bcm2708_fb.fbheight=900 bcm2709.boardrev=0xa21041 bcm2709.serial=0xa37ce24e smsc95xx.macaddr=B8:27:EB:7C:E2:4E bcm2708_fb.fbswap=1 bcm2709.disk_led_gpio=47 bcm2709.disk_led_active_low=0 sdhci-bcm2708.emmc_clock_freq=250000000 vc_mem.mem_base=0x3dc00000 vc_mem.mem_size=0x3f000000 dwc_otg.lpm_enable=0 console=ttyAMA0,115200 root=/dev/disk/by-label/system-a init=/lib/systemd/systemd ro panic=-1 fixrtc elevator=deadline rootwait

[ 0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes)

[ 0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)

[ 0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)

[ 0.000000] Memory: 928208K/966656K available (5717K kernel code, 397K rwdata, 1748K rodata, 388K init, 763K bss, 38448K reserved)

[ 0.000000] Virtual kernel memory layout:

[ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB)

[ 0.000000] fixmap : 0xffc00000 - 0xffe00000 (2048 kB)

[ 0.000000] vmalloc : 0xbb800000 - 0xff000000 (1080 MB)

[ 0.000000] lowmem : 0x80000000 - 0xbb000000 ( 944 MB)

[ 0.000000] modules : 0x7f000000 - 0x80000000 ( 16 MB)

[ 0.000000] .text : 0x80008000 - 0x807527f0 (7466 kB)

[ 0.000000] .init : 0x80753000 - 0x807b4000 ( 388 kB)

[ 0.000000] .data : 0x807b4000 - 0x8081747c ( 398 kB)

[ 0.000000] .bss : 0x8081747c - 0x808d61d4 ( 764 kB)

[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1

[ 0.000000] Preemptible hierarchical RCU implementation.

[ 0.000000] NR_IRQS:608

[ 0.000000] Architected cp15 timer(s) running at 19.20MHz (virt).

[ 0.000012] sched_clock: 56 bits at 19MHz, resolution 52ns, wraps every 3579139424256ns

[ 0.000035] Switching to timer-based delay loop, resolution 52ns

[ 0.000315] Console: colour dummy device 80x30

[ 0.000355] Calibrating delay loop (skipped), value calculated using timer frequency.. 38.40 BogoMIPS (lpj=192000)

[ 0.000382] pid_max: default: 32768 minimum: 301

[ 0.000794] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes)

[ 0.000816] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes)

[ 0.002031] Initializing cgroup subsys memory

[ 0.002083] Initializing cgroup subsys devices

[ 0.002112] Initializing cgroup subsys freezer

[ 0.002139] Initializing cgroup subsys net_cls

[ 0.002162] Initializing cgroup subsys blkio

[ 0.002268] CPU: Testing write buffer coherency: ok

[ 0.002353] ftrace: allocating 19588 entries in 58 pages

[ 0.050584] missing device node for CPU 0

[ 0.050623] missing device node for CPU 1

[ 0.050635] missing device node for CPU 2

[ 0.050646] missing device node for CPU 3

[ 0.050666] CPU0: thread -1, cpu 0, socket 15, mpidr 80000f00

[ 0.050682] [bcm2709_smp_prepare_cpus] enter

[ 0.050813] Setting up static identity map for 0x5279d8 - 0x527a0c

[ 0.110560] [bcm2709_boot_secondary] cpu:1 started (0) 18

[ 0.110867] CPU1: Booted secondary processor

[ 0.110876] [bcm2709_secondary_init] enter cpu:1

[ 0.110929] CPU1: thread -1, cpu 1, socket 15, mpidr 80000f01

[ 0.130535] [bcm2709_boot_secondary] cpu:2 started (0) 16

[ 0.130776] CPU2: Booted secondary processor

[ 0.130784] [bcm2709_secondary_init] enter cpu:2

[ 0.130820] CPU2: thread -1, cpu 2, socket 15, mpidr 80000f02

[ 0.150594] [bcm2709_boot_secondary] cpu:3 started (0) 18

[ 0.150820] CPU3: Booted secondary processor

[ 0.150827] [bcm2709_secondary_init] enter cpu:3

[ 0.150857] CPU3: thread -1, cpu 3, socket 15, mpidr 80000f03

[ 0.150949] Brought up 4 CPUs

[ 0.150981] SMP: Total of 4 processors activated (153.60 BogoMIPS).

[ 0.150992] CPU: All CPU(s) started in SVC mode.

[ 0.152003] devtmpfs: initialized

[ 0.176807] VFP support v0.3: implementor 41 architecture 2 part 30 variant 7 rev 5

[ 0.178779] pinctrl core: initialized pinctrl subsystem

[ 0.179551] NET: Registered protocol family 16

[ 0.185214] DMA: preallocated 4096 KiB pool for atomic coherent allocations

[ 0.186359] bcm2709.uart_clock = 3000000

[ 0.188705] hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers.

[ 0.188720] hw-breakpoint: maximum watchpoint size is 8 bytes.

[ 0.188759] mailbox: Broadcom VideoCore Mailbox driver

[ 0.188867] bcm2708_vcio: mailbox at f300b880

[ 0.189223] bcm_power: Broadcom power driver

[ 0.189241] bcm_power_open() -> 0

[ 0.189252] bcm_power_request(0, 8)

[ 0.689939] bcm_mailbox_read -> 00000080, 0

[ 0.689952] bcm_power_request -> 0

[ 0.690073] Serial: AMBA PL011 UART driver

[ 0.690203] dev:f1: ttyAMA0 at MMIO 0x3f201000 (irq = 83, base_baud = 0) is a PL011 rev3

[ 1.195411] console [ttyAMA0] enabled

[ 1.263784] SCSI subsystem initialized

[ 1.267759] usbcore: registered new interface driver usbfs

[ 1.273400] usbcore: registered new interface driver hub

[ 1.278844] usbcore: registered new device driver usb

[ 1.285730] Switched to clocksource arch_sys_counter

[ 1.321312] FS-Cache: Loaded

[ 1.324507] CacheFiles: Loaded

[ 1.338868] NET: Registered protocol family 2

[ 1.344505] TCP established hash table entries: 8192 (order: 3, 32768 bytes)

[ 1.351724] TCP bind hash table entries: 8192 (order: 4, 65536 bytes)

[ 1.358419] TCP: Hash tables configured (established 8192 bind 8192)

[ 1.364871] TCP: reno registered

[ 1.368140] UDP hash table entries: 512 (order: 2, 16384 bytes)

[ 1.374104] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)

[ 1.380829] NET: Registered protocol family 1

[ 1.385830] RPC: Registered named UNIX socket transport module.

[ 1.391747] RPC: Registered udp transport module.

[ 1.396472] RPC: Registered tcp transport module.

[ 1.401170] RPC: Registered tcp NFSv4.1 backchannel transport module.

[ 1.407969] Trying to unpack rootfs image as initramfs...

[ 1.413710] rootfs image is not initramfs (compression method lzma not configured); looks like an initrd

[ 1.483308] Freeing initrd memory: 12660K (ba393000 - baff0000)

[ 1.490700] bcm2708_dma: DMA manager at f3007000

[ 1.495447] bcm2708_gpio: bcm2708_gpio_probe 807df0a8

[ 1.501251] vc-mem: phys_addr:0x00000000 mem_base=0x3dc00000 mem_size:0x3f000000(1008 MiB)

[ 1.511126] futex hash table entries: 1024 (order: 4, 65536 bytes)

[ 1.517566] audit: initializing netlink subsys (disabled)

[ 1.523020] audit: type=2000 audit(1.299:1): initialized

[ 1.544791] VFS: Disk quotas dquot_6.5.2

[ 1.549104] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)

[ 1.558611] FS-Cache: Netfs 'nfs' registered for caching

[ 1.564864] NFS: Registering the id_resolver key type

[ 1.570002] Key type id_resolver registered

[ 1.574181] Key type id_legacy registered

[ 1.579335] msgmni has been set to 1853

[ 1.584926] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252)

[ 1.592587] io scheduler noop registered

[ 1.596565] io scheduler deadline registered (default)

[ 1.602062] io scheduler cfq registered

[ 1.607947] BCM2708FB: allocated DMA memory f9c00000

[ 1.612946] BCM2708FB: allocated DMA channel 0 @ f3007000

[ 1.642946] Console: switching to colour frame buffer device 200x56

[ 1.664773] bcm2708-dmaengine bcm2708-dmaengine: Load BCM2835 DMA engine driver

[ 1.672467] uart-pl011 dev:f1: no DMA platform data

[ 1.677889] vc-cma: Videocore CMA driver

[ 1.681811] vc-cma: vc_cma_base = 0x00000000

[ 1.686538] vc-cma: vc_cma_size = 0x00000000 (0 MiB)

[ 1.691929] vc-cma: vc_cma_initial = 0x00000000 (0 MiB)

[ 1.709185] brd: module loaded

[ 1.718203] loop: module loaded

[ 1.721643] vchiq: vchiq_init_state: slot_zero = 0xb9800000, is_master = 0

[ 1.729344] Loading iSCSI transport class v2.0-870.

[ 1.735106] usbcore: registered new interface driver smsc95xx

[ 1.740969] dwc_otg: version 3.00a 10-AUG-2012 (platform bus)

[ 1.947049] Core Release: 2.80a

[ 1.950209] Setting default values for core params

[ 1.955034] Finished setting default values for core params

[ 2.161054] Using Buffer DMA mode

[ 2.164369] Periodic Transfer Interrupt Enhancement - disabled

[ 2.170210] Multiprocessor Interrupt Enhancement - disabled

[ 2.175793] OTG VER PARAM: 0, OTG VER FLAG: 0

[ 2.180150] Dedicated Tx FIFOs mode

[ 2.183959] WARN::dwc_otg_hcd_init:1047: FIQ DMA bounce buffers: virt = 0xb9c14000 dma = 0xf9c14000 len=9024

[ 2.193830] FIQ FSM acceleration enabled for :

[ 2.193830] Non-periodic Split Transactions

[ 2.193830] Periodic Split Transactions

[ 2.193830] High-Speed Isochronous Endpoints

[ 2.210588] WARN::hcd_init_fiq:412: FIQ on core 1 at 0x803d8d0c

[ 2.216506] WARN::hcd_init_fiq:413: FIQ ASM at 0x803d9068 length 36

[ 2.222770] WARN::hcd_init_fiq:438: MPHI regs_base at 0xbb80a000

[ 2.228854] dwc_otg bcm2708_usb: DWC OTG Controller

[ 2.233783] dwc_otg bcm2708_usb: new USB bus registered, assigned bus number 1

[ 2.241060] dwc_otg bcm2708_usb: irq 32, io mem 0x00000000

[ 2.246607] Init: Port Power? op_state=1

[ 2.250524] Init: Power Port (0)

[ 2.254024] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002

[ 2.260839] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1

[ 2.268077] usb usb1: Product: DWC OTG Controller

[ 2.272779] usb usb1: Manufacturer: Linux 3.18.10-v7+ dwc_otg_hcd

[ 2.278888] usb usb1: SerialNumber: bcm2708_usb

[ 2.284264] hub 1-0:1.0: USB hub found

[ 2.288112] hub 1-0:1.0: 1 port detected

[ 2.292928] usbcore: registered new interface driver usb-storage

[ 2.299274] mousedev: PS/2 mouse device common for all mice

[ 2.305516] bcm2835-cpufreq: min=600000 max=900000

[ 2.310737] sdhci: Secure Digital Host Controller Interface driver

[ 2.316974] sdhci: Copyright(c) Pierre Ossman

[ 2.321509] DMA channels allocated for the MMC driver

[ 2.365772] Load BCM2835 MMC driver

[ 2.369588] sdhci-pltfm: SDHCI platform and OF driver helper

[ 2.378943] ledtrig-cpu: registered to indicate activity on CPUs

[ 2.386069] hidraw: raw HID events driver (C) Jiri Kosina

[ 2.391718] usbcore: registered new interface driver usbhid

[ 2.397308] usbhid: USB HID core driver

[ 2.401436] TCP: cubic registered

[ 2.404755] Initializing XFRM netlink socket

[ 2.409077] NET: Registered protocol family 17

[ 2.413674] Key type dns_resolver registered

[ 2.418395] Registering SWP/SWPB emulation handler

[ 2.424047] registered taskstats version 1

[ 2.424370] mmc0: host does not support reading read-only switch, assuming write-enable

[ 2.427427] mmc0: new high speed SDHC card at address aaaa

[ 2.428117] mmcblk0: mmc0:aaaa SL08G 7.40 GiB

[ 2.437619] mmcblk0: p1 p2 p3 p4

[ 2.449760] vc-sm: Videocore shared memory driver

[ 2.454468] [vc_sm_connected_init]: start

[ 2.459202] [vc_sm_connected_init]: end - returning 0

[ 2.465182] RAMDISK: lzma image found at block 0

[ 2.469881] RAMDISK: lzma decompressor not configured!

[ 2.475016] Invalid ramdisk decompression routine. Select appropriate config option.

[ 2.482897] Kernel panic - not syncing: Could not decompress initial ramdisk image.

[ 2.485895] Indeed it is in host mode hprt0 = 00021501

[ 2.495673] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.18.10-v7+ #2

[ 2.502050] [<80015ee8>] (unwind_backtrace) from [<800127b0>] (show_stack+0x20/0x24)

[ 2.509799] [<800127b0>] (show_stack) from [<8051ff5c>] (dump_stack+0x98/0xd8)

[ 2.517026] [<8051ff5c>] (dump_stack) from [<8051c5e0>] (panic+0xa4/0x204)

[ 2.523907] [<8051c5e0>] (panic) from [<80754b9c>] (rd_load_image+0x2bc/0x5e4)

[ 2.531131] [<80754b9c>] (rd_load_image) from [<80754fe0>] (initrd_load+0x40/0x2d8)

[ 2.538788] [<80754fe0>] (initrd_load) from [<8075460c>] (prepare_namespace+0xd0/0x1c8)

[ 2.546791] [<8075460c>] (prepare_namespace) from [<80753ea8>] (kernel_init_freeable+0x18c/0x1d4)

[ 2.555662] [<80753ea8>] (kernel_init_freeable) from [<8051ba48>] (kernel_init+0x18/0xfc)

[ 2.563839] [<8051ba48>] (kernel_init) from [<8000ea08>] (ret_from_fork+0x14/0x20)

[ 2.571406] CPU1: stopping

[ 2.574118] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.18.10-v7+ #2

[ 2.580480] [<80015ee8>] (unwind_backtrace) from [<800127b0>] (show_stack+0x20/0x24)

[ 2.588227] [<800127b0>] (show_stack) from [<8051ff5c>] (dump_stack+0x98/0xd8)

[ 2.595451] [<8051ff5c>] (dump_stack) from [<80014758>] (handle_IPI+0x234/0x268)

[ 2.602844] [<80014758>] (handle_IPI) from [<800085f8>] (do_IPI+0x18/0x1c)

[ 2.609719] [<800085f8>] (do_IPI) from [<80525774>] (__irq_svc+0x34/0x14c)

[ 2.616584] Exception stack(0xb8ce3f70 to 0xb8ce3fb8)

[ 2.621634] 3f60: 807d9ccc 00000000 00000000 00000000

[ 2.629806] 3f80: b8ce2000 00000001 807d8dd4 808177c8 8081289c 807d8d74 8052a828 b8ce3fc4

[ 2.637976] 3fa0: b8ce3fb8 b8ce3fb8 8000f498 8000f49c 60000113 ffffffff

[ 2.644593] [<80525774>] (__irq_svc) from [<8000f49c>] (arch_cpu_idle+0x30/0x4c)

[ 2.651992] [<8000f49c>] (arch_cpu_idle) from [<8005a11c>] (cpu_startup_entry+0x1e4/0x264)

[ 2.660255] [<8005a11c>] (cpu_startup_entry) from [<800142a8>] (secondary_start_kernel+0x144/0x164)

[ 2.669295] [<800142a8>] (secondary_start_kernel) from [<00008684>] (0x8684)

[ 2.676335] CPU2: stopping

[ 2.679046] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 3.18.10-v7+ #2

[ 2.685406] [<80015ee8>] (unwind_backtrace) from [<800127b0>] (show_stack+0x20/0x24)

[ 2.693151] [<800127b0>] (show_stack) from [<8051ff5c>] (dump_stack+0x98/0xd8)

[ 2.700374] [<8051ff5c>] (dump_stack) from [<80014758>] (handle_IPI+0x234/0x268)

[ 2.707766] [<80014758>] (handle_IPI) from [<800085f8>] (do_IPI+0x18/0x1c)

[ 2.714640] [<800085f8>] (do_IPI) from [<80525774>] (__irq_svc+0x34/0x14c)

[ 2.721504] Exception stack(0xb8ce5f70 to 0xb8ce5fb8)

[ 2.726552] 5f60: 807d9ccc 00000000 00000000 00000000

[ 2.734723] 5f80: b8ce4000 00000002 807d8dd4 808177c8 8081289c 807d8d74 8052a828 b8ce5fc4

[ 2.742893] 5fa0: b8ce5fb8 b8ce5fb8 8000f498 8000f49c 60000113 ffffffff

[ 2.749509] [<80525774>] (__irq_svc) from [<8000f49c>] (arch_cpu_idle+0x30/0x4c)

[ 2.756905] [<8000f49c>] (arch_cpu_idle) from [<8005a11c>] (cpu_startup_entry+0x1e4/0x264)

[ 2.765168] [<8005a11c>] (cpu_startup_entry) from [<800142a8>] (secondary_start_kernel+0x144/0x164)

[ 2.774205] [<800142a8>] (secondary_start_kernel) from [<00008684>] (0x8684)

[ 2.781244] CPU3: stopping

[ 2.783955] CPU: 3 PID: 0 Comm: swapper/3 Not tainted 3.18.10-v7+ #2

[ 2.790316] [<80015ee8>] (unwind_backtrace) from [<800127b0>] (show_stack+0x20/0x24)

[ 2.798061] [<800127b0>] (show_stack) from [<8051ff5c>] (dump_stack+0x98/0xd8)

[ 2.805284] [<8051ff5c>] (dump_stack) from [<80014758>] (handle_IPI+0x234/0x268)

[ 2.812677] [<80014758>] (handle_IPI) from [<800085f8>] (do_IPI+0x18/0x1c)

[ 2.819551] [<800085f8>] (do_IPI) from [<80525774>] (__irq_svc+0x34/0x14c)

[ 2.826415] Exception stack(0xb8ce7f70 to 0xb8ce7fb8)

[ 2.831463] 7f60: 807d9ccc 00000000 00000000 00000000

[ 2.839635] 7f80: b8ce6000 00000003 807d8dd4 808177c8 8081289c 807d8d74 8052a828 b8ce7fc4

[ 2.847803] 7fa0: b8ce7fb8 b8ce7fb8 8000f498 8000f49c 60000113 ffffffff

[ 2.854419] [<80525774>] (__irq_svc) from [<8000f49c>] (arch_cpu_idle+0x30/0x4c)

[ 2.861816] [<8000f49c>] (arch_cpu_idle) from [<8005a11c>] (cpu_startup_entry+0x1e4/0x264)

[ 2.870078] [<8005a11c>] (cpu_startup_entry) from [<800142a8>] (secondary_start_kernel+0x144/0x164)

[ 2.879116] [<800142a8>] (secondary_start_kernel) from [<00008684>] (0x8684)

아래는 정상부팅일 경우

Uncompressing Linux... done, booting the kernel.

[ 0.000000] Booting Linux on physical CPU 0xf00

[ 0.000000] Initializing cgroup subsys cpuset

[ 0.000000] Initializing cgroup subsys cpu

[ 0.000000] Initializing cgroup subsys cpuacct

[ 0.000000] Linux version 3.18.3-v7+ (michael@ubuntu) (gcc version 4.7.4 (Ubuntu/Linaro 4.7.4-2ubuntu1) ) #4 SMP PREEMPT Thu Jan 29 09:31:27 EST 2015

[ 0.000000] CPU: ARMv7 Processor [410fc075] revision 5 (ARMv7), cr=10c5387d

[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache

[ 0.000000] Machine: BCM2709

[ 0.000000] cma: Reserved 8 MiB at 0x39800000

[ 0.000000] Memory policy: Data cache writealloc

[ 0.000000] [bcm2709_smp_init_cpus] enter (8600->f3003010)

[ 0.000000] [bcm2709_smp_init_cpus] ncores=4

[ 0.000000] PERCPU: Embedded 11 pages/cpu @ba365000 s13120 r8192 d23744 u45056

[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 239776

[ 0.000000] Kernel command line: dma.dmachans=0x7f35 bcm2708_fb.fbwidth=1600 bcm2708_fb.fbheight=900 bcm2709.boardrev=0xa21041 bcm2709.serial=0xa37ce24e smsc95xx.macaddr=B8:27:EB:7C:E2:4E bcm2708_fb.fbswap=1 bcm2709.disk_led_gpio=47 bcm2709.disk_led_active_low=0 sdhci-bcm2708.emmc_clock_freq=250000000 vc_mem.mem_base=0x3dc00000 vc_mem.mem_size=0x3f000000 dwc_otg.lpm_enable=0 console=ttyAMA0,115200 root=/dev/disk/by-label/system-a init=/lib/systemd/systemd ro panic=-1 fixrtc elevator=deadline rootwait

[ 0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes)

[ 0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)

[ 0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)

[ 0.000000] Memory: 927012K/966656K available (6645K kernel code, 409K rwdata, 1908K rodata, 444K init, 788K bss, 39644K reserved)

[ 0.000000] Virtual kernel memory layout:

[ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB)

[ 0.000000] fixmap : 0xffc00000 - 0xffe00000 (2048 kB)

[ 0.000000] vmalloc : 0xbb800000 - 0xff000000 (1080 MB)

[ 0.000000] lowmem : 0x80000000 - 0xbb000000 ( 944 MB)

[ 0.000000] modules : 0x7f000000 - 0x80000000 ( 16 MB)

[ 0.000000] .text : 0x80008000 - 0x80862874 (8555 kB)

[ 0.000000] .init : 0x80863000 - 0x808d2000 ( 444 kB)

[ 0.000000] .data : 0x808d2000 - 0x809384a4 ( 410 kB)

[ 0.000000] .bss : 0x809384a4 - 0x809fd4a8 ( 789 kB)

[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1

[ 0.000000] Preemptible hierarchical RCU implementation.

[ 0.000000] NR_IRQS:480

[ 0.000000] Architected cp15 timer(s) running at 19.20MHz (virt).

[ 0.000014] sched_clock: 56 bits at 19MHz, resolution 52ns, wraps every 3579139424256ns

[ 0.000035] Switching to timer-based delay loop, resolution 52ns

[ 0.000321] Console: colour dummy device 80x30

[ 0.000363] Calibrating delay loop (skipped), value calculated using timer frequency.. 38.40 BogoMIPS (lpj=192000)

[ 0.000388] pid_max: default: 32768 minimum: 301

[ 0.000540] Security Framework initialized

[ 0.000652] AppArmor: AppArmor initialized

[ 0.000930] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes)

[ 0.000952] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes)

[ 0.002296] Initializing cgroup subsys memory

[ 0.002353] Initializing cgroup subsys devices

[ 0.002383] Initializing cgroup subsys freezer

[ 0.002409] Initializing cgroup subsys net_cls

[ 0.002433] Initializing cgroup subsys blkio

[ 0.002519] CPU: Testing write buffer coherency: ok

[ 0.002603] ftrace: allocating 23086 entries in 68 pages

[ 0.059149] missing device node for CPU 0

[ 0.059187] missing device node for CPU 1

[ 0.059198] missing device node for CPU 2

[ 0.059208] missing device node for CPU 3

[ 0.059227] CPU0: thread -1, cpu 0, socket 15, mpidr 80000f00

[ 0.059244] [bcm2709_smp_prepare_cpus] enter

[ 0.059377] Setting up static identity map for 0x5fdd90 - 0x5fddc4

[ 0.119119] [bcm2709_boot_secondary] cpu:1 started (0) 17

[ 0.119414] CPU1: Booted secondary processor

[ 0.119422] [bcm2709_secondary_init] enter cpu:1

[ 0.119480] CPU1: thread -1, cpu 1, socket 15, mpidr 80000f01

[ 0.139127] [bcm2709_boot_secondary] cpu:2 started (0) 16

[ 0.139364] CPU2: Booted secondary processor

[ 0.139371] [bcm2709_secondary_init] enter cpu:2

[ 0.139405] CPU2: thread -1, cpu 2, socket 15, mpidr 80000f02

[ 0.159138] [bcm2709_boot_secondary] cpu:3 started (0) 18

[ 0.159358] CPU3: Booted secondary processor

[ 0.159365] [bcm2709_secondary_init] enter cpu:3

[ 0.159396] CPU3: thread -1, cpu 3, socket 15, mpidr 80000f03

[ 0.159501] Brought up 4 CPUs

[ 0.159532] SMP: Total of 4 processors activated (153.60 BogoMIPS).

[ 0.159543] CPU: All CPU(s) started in SVC mode.

[ 0.160621] devtmpfs: initialized

[ 0.184273] VFP support v0.3: implementor 41 architecture 2 part 30 variant 7 rev 5

[ 0.186260] pinctrl core: initialized pinctrl subsystem

[ 0.186724] regulator-dummy: no parameters

[ 0.187487] NET: Registered protocol family 16

[ 0.193344] DMA: preallocated 4096 KiB pool for atomic coherent allocations

[ 0.218893] cpuidle: using governor ladder

[ 0.248924] cpuidle: using governor menu

[ 0.249473] bcm2709.uart_clock = 3000000

[ 0.251800] hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers.

[ 0.251818] hw-breakpoint: maximum watchpoint size is 8 bytes.

[ 0.251855] mailbox: Broadcom VideoCore Mailbox driver

[ 0.251951] bcm2708_vcio: mailbox at f300b880

[ 0.252048] bcm_power: Broadcom power driver

[ 0.252064] bcm_power_open() -> 0

[ 0.252075] bcm_power_request(0, 8)

[ 0.752766] bcm_mailbox_read -> 00000080, 0

[ 0.752779] bcm_power_request -> 0

[ 0.752910] Serial: AMBA PL011 UART driver

[ 0.753045] uart-pl011 dev:f1: ttyAMA0 at MMIO 0x3f201000 (irq = 83, base_baud = 0) is a PL011 rev3

[ 1.278902] console [ttyAMA0] enabled

[ 1.352357] SCSI subsystem initialized

[ 1.356350] usbcore: registered new interface driver usbfs

[ 1.361994] usbcore: registered new interface driver hub

[ 1.367434] usbcore: registered new device driver usb

[ 1.373822] NetLabel: Initializing

[ 1.377224] NetLabel: domain hash size = 128

[ 1.381571] NetLabel: protocols = UNLABELED CIPSOv4

[ 1.386622] NetLabel: unlabeled traffic allowed by default

[ 1.393106] Switched to clocksource arch_sys_counter

[ 1.431003] FS-Cache: Loaded

[ 1.434268] CacheFiles: Loaded

[ 1.437799] AppArmor: AppArmor Filesystem Enabled

[ 1.454386] NET: Registered protocol family 2

[ 1.460051] TCP established hash table entries: 8192 (order: 3, 32768 bytes)

[ 1.467246] TCP bind hash table entries: 8192 (order: 4, 65536 bytes)

[ 1.473922] TCP: Hash tables configured (established 8192 bind 8192)

[ 1.480371] TCP: reno registered

[ 1.483634] UDP hash table entries: 512 (order: 2, 16384 bytes)

[ 1.489596] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)

[ 1.496335] NET: Registered protocol family 1

[ 1.501144] RPC: Registered named UNIX socket transport module.

[ 1.507146] RPC: Registered udp transport module.

[ 1.511847] RPC: Registered tcp transport module.

[ 1.516577] RPC: Registered tcp NFSv4.1 backchannel transport module.

[ 1.523420] Trying to unpack rootfs image as initramfs...

[ 14.530387] Freeing initrd memory: 12660K (ba393000 - baff0000)

음.. General Setup에 Initramfs source file가 누락되서 그런가?

링크를 보니 절대경로라는데.. 음? 머지 -ㅁ-?

[링크 : https://wiki.gentoo.org/wiki/Custom_Initramfs]

.config - Linux/arm 3.18.10 Kernel Configuration

> General setup qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq

lqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq General setup qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqk

x Arrow keys navigate the menu. <Enter> selects submenus ---> (or empty submenus ----). Highlighted x

x letters are hotkeys. Pressing <Y> includes, <N> excludes, <M> modularizes features. Press <Esc><Esc> to x

x exit, <?> for Help, </> for Search. Legend: [*] built-in [ ] excluded <M> module < > module capable x

x x

x lqqqqqqqqqqqqqqqqq^(-)qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqk x

x x -*- Kernel->user space relay support (formerly relayfs) x x

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

x x () Initramfs source file(s) x x

x x [*] Support initial ramdisks compressed using gzip x x

x x [ ] Support initial ramdisks compressed using bzip2 x x

x x [ ] Support initial ramdisks compressed using LZMA x x

x x [ ] Support initial ramdisks compressed using XZ x x

x x [ ] Support initial ramdisks compressed using LZO x x

x x [ ] Support initial ramdisks compressed using LZ4 x x

x x [ ] Optimize for size x x

x x -*- Configure standard kernel features (expert users) ---> x x

x x [*] Embedded system x x

x x Kernel Performance Events And Counters ---> x x

x x [*] Enable VM event counters for /proc/vmstat x x

x x [*] Enable SLUB debugging support x x

x mqqqqqqqqqqqqqqqqqv(+)qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj x

tqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqu

x <Select> < Exit > < Help > < Save > < Load > x

mqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj

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Posted by 구차니

라즈베리 파이 2 - RootFS in linux

openELEC

$ file *

LICENCE.broadcom: ASCII text

SYSTEM: Squashfs filesystem, little endian, version 4.0, 98925267 bytes, 9140 inodes, blocksize: 131072 bytes, created: Wed Apr 1 06:38:30 2015

bcm2709-rpi-2-b.dtb: data

bootcode.bin: data

cmdline.txt: ASCII text

config.txt: ASCII text

fixup.dat: data

kernel.img: Linux kernel ARM boot executable zImage (little-endian)

overlays: directory

start.elf: ELF 32-bit LSB executable, version 1 (SYSV), statically linked, stripped

$ ll -h

합계 105M

drwxr-xr-x 3 root root 16K 1월 1 1970 ./

drwxr-xr-x 3 root root 4.0K 3월 26 09:26 ../

-rwxr-xr-x 1 root root 1.5K 3월 31 21:38 LICENCE.broadcom*

-rwxr-xr-x 1 root root 95M 4월 4 01:59 SYSTEM*

-rwxr-xr-x 1 root root 5.6K 3월 31 21:38 bcm2709-rpi-2-b.dtb*

-rwxr-xr-x 1 root root 18K 3월 31 21:38 bootcode.bin*

-rwxr-xr-x 1 root root 46 2월 25 22:26 cmdline.txt*

-rwxr-xr-x 1 root root 4.6K 2월 25 22:26 config.txt*

-rwxr-xr-x 1 root root 9.0K 3월 31 21:38 fixup.dat*

-rwxr-xr-x 1 root root 6.1M 4월 4 01:59 kernel.img*

drwxr-xr-x 2 root root 4.0K 1월 1 1980 overlays/

-rwxr-xr-x 1 root root 4.5M 3월 31 21:38 start.elf*

ubuntu snappy

$ ll -h

합계 28M

drwxr-xr-x 5 root root 2.0K 1월 1 1970 ./

drwxr-xr-x 3 root root 4.0K 3월 26 09:26 ../

-rwxr-xr-x 1 root root 19K 1월 28 15:36 COPYING.linux*

-rwxr-xr-x 1 root root 1.5K 1월 28 15:36 LICENCE.broadcom*

drwxr-xr-x 3 root root 512 2월 2 10:08 a/

drwxr-xr-x 3 root root 512 2월 2 10:08 b/

-rwxr-xr-x 1 root root 4.2K 1월 28 15:36 bcm2708-rpi-b-plus.dtb*

-rwxr-xr-x 1 root root 4.2K 1월 28 15:36 bcm2708-rpi-b.dtb*

-rwxr-xr-x 1 root root 18K 1월 28 15:36 bootcode.bin*

-rwxr-xr-x 1 root root 149 1월 29 10:12 cmdline.txt*

-rwxr-xr-x 1 root root 1.4K 1월 29 10:12 config.txt*

-rwxr-xr-x 1 root root 6.0K 1월 28 15:36 fixup.dat*

-rwxr-xr-x 1 root root 2.3K 1월 28 15:36 fixup_cd.dat*

-rwxr-xr-x 1 root root 9.0K 1월 28 15:36 fixup_x.dat*

-rwxr-xr-x 1 root root 13M 1월 29 10:23 initrd.img*

-rwxr-xr-x 1 root root 3.9M 1월 28 15:36 kernel.img*

-rwxr-xr-x 1 root root 4.3M 1월 29 09:36 kernel7.img*

drwxr-xr-x 2 root root 1.5K 1월 28 15:36 overlays/

-rwxr-xr-x 1 root root 1.6K 1월 1 1980 snappy-system.txt*

-rwxr-xr-x 1 root root 2.6M 1월 28 15:36 start.elf*

-rwxr-xr-x 1 root root 541K 1월 28 15:36 start_cd.elf*

-rwxr-xr-x 1 root root 3.5M 1월 28 15:36 start_x.elf*

-rwxr-xr-x 1 root root 0 1월 29 11:21 uEnv.txt*

$ file *

COPYING.linux: Pascal source, ASCII text

LICENCE.broadcom: ASCII text

a: directory

b: directory

bcm2708-rpi-b-plus.dtb: data

bcm2708-rpi-b.dtb: data

bootcode.bin: data

cmdline.txt: ASCII text

config.txt: ASCII text

fixup.dat: data

fixup_cd.dat: data

fixup_x.dat: data

initrd.img: LZMA compressed data, streamed

kernel.img: Linux kernel ARM boot executable zImage (little-endian)

kernel7.img: Linux kernel ARM boot executable zImage (little-endian)

overlays: directory

snappy-system.txt: ASCII text, with very long lines

start.elf: ELF 32-bit LSB executable, version 1 (SYSV), statically linked, stripped

start_cd.elf: ELF 32-bit LSB executable, version 1 (SYSV), statically linked, stripped

start_x.elf: ELF 32-bit LSB executable, version 1 (SYSV), statically linked, stripped

uEnv.txt: empty

라즈베리 파이 커널 컴파일

~/rasp/linux/arch/arm/boot$ ll -h

합계 12M

drwxrwxr-x 5 minimonk minimonk 4.0K 4월 9 22:45 ./

drwxrwxr-x 89 minimonk minimonk 4.0K 3월 26 17:24 ../

-rw-rw-r-- 1 minimonk minimonk 109 4월 9 22:45 .Image.cmd

-rw-rw-r-- 1 minimonk minimonk 46 3월 26 17:24 .gitignore

-rw-rw-r-- 1 minimonk minimonk 136 4월 9 22:45 .zImage.cmd

-rwxrwxr-x 1 minimonk minimonk 8.1M 4월 9 22:45 Image*

-rw-rw-r-- 1 minimonk minimonk 3.1K 3월 26 17:24 Makefile

drwxrwxr-x 2 minimonk minimonk 4.0K 3월 26 17:24 bootp/

drwxrwxr-x 2 minimonk minimonk 4.0K 4월 9 22:45 compressed/

drwxrwxr-x 3 minimonk minimonk 52K 4월 9 22:44 dts/

-rw-rw-r-- 1 minimonk minimonk 1.7K 3월 26 17:24 install.sh

-rwxrwxr-x 1 minimonk minimonk 3.8M 4월 9 22:45 zImage*

~/rasp/linux/arch/arm/boot$ file *

Image: data

Makefile: ASCII text

bootp: directory

compressed: directory

dts: directory

install.sh: POSIX shell script, ASCII text executable

zImage: Linux kernel ARM boot executable zImage (little-endian)

그러니까.. 저 zImage 파일을 다른걸로 이름 바꿔서 테스트 하면 되는거군?!

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Posted by 구차니

ltib 패키지 요구사항

음.. rpm이 요구사항이라.. 우분투에서는 조금 빡센건가..

그나저나.. 저런거 깔아도 경로 문제는 해결이 안되는거 같던데.. 끄응...

[링크 : http://ltib.org/documentation-LtibFaq#ref_10]

sudo apt-get install gettext libgtk2.0-dev rpm bison m4 libfreetype6-dev

sudo apt-get install libdbus-glib-1-dev liborbit2-dev intltool

sudo apt-get install ccache ncurses-dev zlib1g zlib1g-dev gcc g++ libtool

sudo apt-get install uuid-dev liblzo2-dev

sudo apt-get install tcl dpkg

sudo apt-get install texinfo

sudo apt-get install texlive

[링크 : http://forum.falinux.com/zbxe/index.php?document_srl=785246&mid=lecture_tip]

[링크 : http://forum.falinux.com/zbxe/index.php?document_srl=785398&mid=lecture_tip]

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Posted by 구차니

비글본 vs 라즈베리 파이 2

문서를 찾다보니 라즈베리 2랑 비글본 성능을 비교한게 있는데

비글본의 경우 싱글코어 1기가 / 2000MIPS 인데

Cortex-A8과 Cortex-A7의 차이인지 라즈베리를 오버클럭해서 1기가로 올리면 성능 차이는 거의 없다고 할 정도이다.

nbench

Raspberry Pi Model B+ (700 MHz):

INTEGER INDEX : 16.100

FLOATING-POINT INDEX : 5.568

Raspberry Pi 2 Model B (1000 MHz)*:

INTEGER INDEX : 22.322

FLOATING-POINT INDEX: 9.578

BeagleBone Black (1000 MHz):

INTEGER INDEX : 23.314

FLOATING-POINT INDEX: 2.976

*using one core

[링크 : http://hackaday.com/2015/02/05/benchmarking-the-raspberry-pi-2/]

라즈베리 1 B+과 비글본 비교

머.. 솔찍히 이건 비글본이 거의 압승 -_-(10$ 센거 뺴면)

[링크 : http://makezine.com/magazine/how-to-choose-the-right-platform-raspberry-pi-or-beaglebone-black/]]

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Posted by 구차니

라즈베리 파이 2 JFFS2 조사 = 불가!

된다는거야 안된다는거야 -_-

일단은 cmdline 상에는 rootfstype 옵션이 ext4가 기본이라고 한다.

ubuntu snappy와 openelec의 파일 시스템 지원여부 차이점

ubuntu@localhost:~$ cat /proc/filesystems

nodev sysfs

nodev rootfs

nodev ramfs

nodev bdev

nodev proc

nodev cgroup

nodev cpuset

nodev tmpfs

nodev devtmpfs

nodev debugfs

nodev securityfs

nodev sockfs

nodev pipefs

nodev rpc_pipefs

nodev configfs

nodev devpts

ext3

ext2

ext4

vfat

msdos

nodev ecryptfs

nodev nfs

nodev nfs4

nodev autofs

f2fs

nodev mqueue

OpenELEC:~ # cat /proc/filesystems

nodev sysfs

nodev rootfs

nodev ramfs

nodev bdev

nodev proc

nodev cgroup

nodev tmpfs

nodev devtmpfs

nodev debugfs

nodev sockfs

nodev pipefs

nodev rpc_pipefs

nodev devpts

reiserfs

ext3

ext2

ext4

squashfs

vfat

iso9660

hfsplus

hfs

nodev nfs

nodev nfs4

nodev cifs

nodev autofs

udf

jfs

xfs

f2fs

nodev mqueue

btrfs

라즈베리 파이 2 커널에는 jffs2는 기본적으로 존재하지 않는다 (안돼!!!! ㅠㅠ)

.config - Linux/arm 3.18.10 Kernel Configuration

> File systems qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq

lqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq File systems qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqk

x Arrow keys navigate the menu. <Enter> selects submenus ---> (or empty submenus ----). Highlighted x

x letters are hotkeys. Pressing <Y> includes, <N> excludes, <M> modularizes features. Press <Esc><Esc> to x

x exit, <?> for Help, </> for Search. Legend: [*] built-in [ ] excluded <M> module < > module capable x

x x

x lqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqk x

x x < > Second extended fs support x x

x x < > Ext3 journalling file system support x x

x x <*> The Extended 4 (ext4) filesystem x x

x x [*] Use ext4 for ext2/ext3 file systems x x

x x [*] Ext4 POSIX Access Control Lists x x

x x [*] Ext4 Security Labels x x

x x [ ] EXT4 debugging support x x

x x [ ] JBD2 (ext4) debugging support x x

x x <M> Reiserfs support x x

x x [ ] Enable reiserfs debug mode x x

x x [ ] Stats in /proc/fs/reiserfs x x

x x [*] ReiserFS extended attributes x x

x x [*] ReiserFS POSIX Access Control Lists x x

x x [*] ReiserFS Security Labels x x

x x <M> JFS filesystem support x x

x x [*] JFS POSIX Access Control Lists x x

x x [*] JFS Security Labels x x

x x [ ] JFS debugging x x

x x [*] JFS statistics x x

x x <M> XFS filesystem support x x

x x [*] XFS Quota support x x

x x [*] XFS POSIX ACL support x x

x x [*] XFS Realtime subvolume support x x

x x [ ] XFS Verbose Warnings x x

x x [ ] XFS Debugging support x x

x x <M> GFS2 file system support x x

x x [ ] GFS2 DLM locking x x

x x <M> OCFS2 file system support x x

x x <M> O2CB Kernelspace Clustering x x

x x <M> OCFS2 Userspace Clustering x x

x x [*] OCFS2 statistics x x

x x [*] OCFS2 logging support x x

x x [ ] OCFS2 expensive checks x x

x x <M> Btrfs filesystem support x x

x x [*] Btrfs POSIX Access Control Lists x x

x x [ ] Btrfs with integrity check tool compiled in (DANGEROUS) x x

x x [ ] Btrfs will run sanity tests upon loading x x

x x [ ] Btrfs debugging support x x

x x [ ] Btrfs assert support x x

x x <M> NILFS2 file system support x x

x x [*] Enable POSIX file locking API x x

x x [*] Dnotify support x x

x x [*] Inotify support for userspace x x

x x [*] Filesystem wide access notification x x

x x -*- Quota support x x

x x [ ] Report quota messages through netlink interface x x

x x [*] Print quota warnings to console (OBSOLETE) x x

x x [ ] Additional quota sanity checks x x

x x <M> Old quota format support x x

x x <M> Quota format vfsv0 and vfsv1 support x x

x x <*> Kernel automounter version 4 support (also supports v3) x x

x x <M> FUSE (Filesystem in Userspace) support x x

x x <M> Character device in Userspace support x x

x x < > Overlay filesystem support x x

x x Caches ---> x x

x x CD-ROM/DVD Filesystems ---> x x

x x DOS/FAT/NT Filesystems ---> x x

x x Pseudo filesystems ---> x x

x x [*] Miscellaneous filesystems ---> x x

x x [*] Network File Systems ---> x x

x x -*- Native language support ---> x x

x x <M> Distributed Lock Manager (DLM) ---> x x

x mqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj x

tqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqu

x <Select> < Exit > < Help > < Save > < Load > x

mqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj

[링크 : http://www.raspberrypi.org/forums/viewtopic.php?t=61631&p=460046]

[링크 : http://elinux.org/RPi_cmdline.txt]

[링크 : https://forum.openwrt.org/viewtopic.php?id=52133]

[링크 : https://fiasko-nw.net/~thomas/projects/rpi/usb-rootfs.html.en

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ir bpf ?

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