各位好：
在AM335x平台开发，使用initramfs，进入到系统初始化的时候，init进程退出。具体环境及步骤如下：
开发包版本：ti-processor-sdk-linux-am335x-evm-01.00.00.03
文件系统：使用 ti-processor-sdk-linux-am335x-evm-01.00.00.03自带的arago-base-tisdk-image-am335x-evm.tar.gz
开发板：TI官方TMDSSK3358 开发板
步骤
1、参照http://processors.wiki.ti.com/index.php/Initrd#initramfs 制作initramfs系统
2、本机建立TFPT服务，将编译好的zImage和开发包提供的am335x-evmsk.dtb放入到TFTP应用程序目录
3、使用开发板自带的micro sd卡启动开发板，到u-boot提示界面
4、设置网络参数
5、设置bootcmd（直接使用u-boot的“run ramagrs”命令）
4、使用tftp命令加载am335x-evmsk.dtb
5、使用tftp命令加载zImage
6、启动内核
打印信息如下：
Starting kernel ...
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 3.14.43-g875c69b (root@ubuntu) (gcc version 4.7.3 20130226 (prerelease) (crosstool-NG linaro-1.13.1-4.7-2013.03-20130313 - Linaro GCC 2013.03) ) #1 Wed Dec 9 15:24:06 CST 2015
[ 0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c5387d
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[ 0.000000] Machine model: TI AM335x EVM-SK
[ 0.000000] cma: CMA: reserved 24 MiB at 8c800000
[ 0.000000] Memory policy: Data cache writeback
[ 0.000000] CPU: All CPU(s) started in SVC mode.
[ 0.000000] AM335X ES2.1 (sgx neon )
[ 0.000000] Kernel command line: console=ttyO0,115200n8 root=/dev/ram0 rw rootfstype=ext2
[ 0.000000] PID hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
[ 0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
[ 0.000000] Virtual kernel memory layout:
[ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB)
[ 0.000000] fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)
[ 0.000000] vmalloc : 0xd0800000 - 0xff000000 ( 744 MB)
[ 0.000000] lowmem : 0xc0000000 - 0xd0000000 ( 256 MB)
[ 0.000000] pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB)
[ 0.000000] modules : 0xbf000000 - 0xbfe00000 ( 14 MB)
[ 0.000000] .text : 0xc0008000 - 0xc082c0c4 (8337 kB)
[ 0.000000] .init : 0xc082d000 - 0xc1bd3f74 (20124 kB)
[ 0.000000] .data : 0xc1bd4000 - 0xc1c2f860 ( 367 kB)
[ 0.000000] .bss : 0xc1c2f860 - 0xc1c69878 ( 233 kB)
[ 0.000000] NR_IRQS:16 nr_irqs:16 16
[ 0.000000] IRQ: Found an INTC at 0xfa200000 (revision 5.0) with 128 interrupts
[ 0.000000] Total of 128 interrupts on 1 active controller
[ 0.000000] OMAP clockevent source: timer2 at 24000000 Hz
[ 0.000012] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 178956969942ns
[ 0.000029] OMAP clocksource: timer1 at 24000000 Hz
[ 0.000272] Console: colour dummy device 80x30
[ 0.000293] WARNING: Your 'console=ttyO0' has been replaced by 'ttyS0'
[ 0.000298] This ensures that you still see kernel messages. Please
[ 0.000302] update your kernel commandline.
[ 0.000321] Calibrating delay loop... 996.14 BogoMIPS (lpj=4980736)
[ 0.089531] pid_max: default: 32768 minimum: 301
[ 0.089618] Security Framework initialized
[ 0.089706] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.089715] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.096064] CPU: Testing write buffer coherency: ok
[ 0.096424] Setting up static identity map for 0x805e4e60 - 0x805e4eb8
[ 0.100040] devtmpfs: initialized
[ 0.101544] VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3
[ 0.107358] omap_hwmod: tptc0 using broken dt data from edma
[ 0.107427] omap_hwmod: tptc1 using broken dt data from edma
[ 0.107486] omap_hwmod: tptc2 using broken dt data from edma
[ 0.111503] omap_hwmod: debugss: _wait_target_disable failed
[ 0.165845] pinctrl core: initialized pinctrl subsystem
[ 0.166752] regulator-dummy: no parameters
[ 0.168893] NET: Registered protocol family 16
[ 0.170688] DMA: preallocated 256 KiB pool for atomic coherent allocations
[ 0.172860] cpuidle: using governor ladder
[ 0.172874] cpuidle: using governor menu
[ 0.178021] syscon 44e10000.control_module: regmap [mem 0x44e10000-0x44e107fb] registered
[ 0.179254] platform 49000000.edma: alias fck already exists
[ 0.179275] platform 49000000.edma: alias fck already exists
[ 0.179287] platform 49000000.edma: alias fck already exists
[ 0.180347] OMAP GPIO hardware version 0.1
[ 0.192508] No ATAGs?
[ 0.192529] hw-breakpoint: debug architecture 0x4 unsupported.
[ 0.214052] bio: create slab <bio-0> at 0
[ 0.227277] edma-dma-engine edma-dma-engine.0: TI EDMA DMA engine driver
[ 0.228171] vbat: 5000 mV
[ 0.228518] lis3_reg: no parameters
[ 0.228610] reg-fixed-voltage fixedregulator@2: could not find pctldev for node /pinmux@44e10800/pinmux_wl12xx_gpio, deferring probe
[ 0.228629] platform fixedregulator@2: Driver reg-fixed-voltage requests probe deferral
[ 0.229017] vtt: 1500 mV
[ 0.231701] vgaarb: loaded
[ 0.232169] i2c-core: driver [palmas] using legacy suspend method
[ 0.232178] i2c-core: driver [palmas] using legacy resume method
[ 0.232799] SCSI subsystem initialized
[ 0.234061] usbcore: registered new interface driver usbfs
[ 0.234220] usbcore: registered new interface driver hub
[ 0.234385] usbcore: registered new device driver usb
[ 0.235198] omap_i2c 44e0b000.i2c: could not find pctldev for node /pinmux@44e10800/pinmux_i2c0_pins, deferring probe
[ 0.235226] platform 44e0b000.i2c: Driver omap_i2c requests probe deferral
[ 0.235566] pps_core: LinuxPPS API ver. 1 registered
[ 0.235574] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[ 0.235678] PTP clock support registered
[ 0.237338] omap-mailbox 480c8000.mailbox: omap mailbox rev 0x400
[ 0.238130] Advanced Linux Sound Architecture Driver Initialized.
[ 0.239554] Switched to clocksource timer1
[ 0.255648] NET: Registered protocol family 2
[ 0.256414] TCP established hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.256442] TCP bind hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.256465] TCP: Hash tables configured (established 2048 bind 2048)
[ 0.256536] TCP: reno registered
[ 0.256547] UDP hash table entries: 256 (order: 0, 4096 bytes)
[ 0.256562] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[ 0.256709] NET: Registered protocol family 1
[ 0.257073] RPC: Registered named UNIX socket transport module.
[ 0.257085] RPC: Registered udp transport module.
[ 0.257090] RPC: Registered tcp transport module.
[ 0.257095] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 1.701611] hw perfevents: enabled with ARMv7 Cortex-A8 PMU driver, 5 counters available
[ 1.704333] futex hash table entries: 256 (order: -1, 3072 bytes)
[ 1.843024] VFS: Disk quotas dquot_6.5.2
[ 1.843562] NFS: Registering the id_resolver key type
[ 1.843631] Key type id_resolver registered
[ 1.843638] Key type id_legacy registered
[ 1.843672] jffs2: version 2.2. (NAND) (SUMMARY) ? 2001-2006 Red Hat, Inc.
[ 1.843825] msgmni has been set to 448
[ 1.845031] NET: Registered protocol family 38
[ 1.845066] io scheduler noop registered
[ 1.845073] io scheduler deadline registered
[ 1.845092] io scheduler cfq registered (default)
[ 1.846660] pinctrl-single 44e10800.pinmux: 142 pins at pa f9e10800 size 568
[ 1.850190] backlight supply power not found, using dummy regulator
[ 1.853358] Serial: 8250/16550 driver, 10 ports, IRQ sharing enabled
[ 1.857745] 44e09000.serial: ttyS0 at MMIO 0x44e09000 (irq = 88, base_baud = 3000000) is a 8250
[ 2.482727] console [ttyS0] enabled
[ 2.487877] omap_rng 48310000.rng: OMAP Random Number Generator ver. 20
[ 2.494939] [drm] Initialized drm 1.1.0 20060810
[ 2.508694] brd: module loaded
[ 2.516579] loop: module loaded
[ 2.520173] (hci_tty): inside hci_tty_init
[ 2.524695] (hci_tty): allocated 250, 0
[ 2.532311] mtdoops: mtd device (mtddev=name/number) must be supplied
[ 2.542039] usbcore: registered new interface driver asix
[ 2.547659] usbcore: registered new interface driver ax88179_178a
[ 2.553947] usbcore: registered new interface driver cdc_ether
[ 2.559993] usbcore: registered new interface driver smsc95xx
[ 2.565916] usbcore: registered new interface driver net1080
[ 2.571726] usbcore: registered new interface driver cdc_subset
[ 2.577814] usbcore: registered new interface driver zaurus
[ 2.583600] usbcore: registered new interface driver cdc_ncm
[ 2.589795] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 2.596365] ehci-pci: EHCI PCI platform driver
[ 2.601034] ehci-omap: OMAP-EHCI Host Controller driver
[ 2.606706] usbcore: registered new interface driver cdc_wdm
[ 2.612591] usbcore: registered new interface driver usb-storage
[ 2.619581] mousedev: PS/2 mouse device common for all mice
[ 2.626667] input: ti-tsc as /devices/ocp/44e0d000.tscadc/TI-am335x-tsc/input/input0
[ 2.635701] i2c-core: driver [rtc-ds1307] using legacy suspend method
[ 2.642210] i2c-core: driver [rtc-ds1307] using legacy resume method
[ 2.649344] omap_rtc 44e3e000.rtc: rtc core: registered 44e3e000.rtc as rtc0
[ 2.656541] 44e3e000.rtc: already running
[ 2.661282] i2c /dev entries driver
[ 2.664920] Driver for 1-wire Dallas network protocol.
[ 2.672285] omap_wdt: OMAP Watchdog Timer Rev 0x01: initial timeout 60 sec
[ 2.680990] omap_hsmmc 48060000.mmc: unable to get vmmc regulator -517
[ 2.687677] platform 48060000.mmc: Driver omap_hsmmc requests probe deferral
[ 2.695188] omap_hsmmc 481d8000.mmc: unable to get vmmc regulator -517
[ 2.701849] platform 481d8000.mmc: Driver omap_hsmmc requests probe deferral
[ 2.710892] ledtrig-cpu: registered to indicate activity on CPUs
[ 2.717208] omap-aes 53500000.aes: OMAP AES hw accel rev: 3.2
[ 2.724243] omap-sham 53100000.sham: hw accel on OMAP rev 4.3
[ 2.731363] usbcore: registered new interface driver usbhid
[ 2.736962] usbhid: USB HID core driver
[ 2.741088] platform 44d00000.wkup_m3: Driver wkup_m3 requests probe deferral
[ 2.751151] oprofile: using arm/armv7
[ 2.755104] TCP: cubic registered
[ 2.758432] Initializing XFRM netlink socket
[ 2.762839] NET: Registered protocol family 17
[ 2.767343] NET: Registered protocol family 15
[ 2.771925] Key type dns_resolver registered
[ 2.776842] cpu cpu0: of_pm_voltdm_notifier_register: Failed to get cpu0 regulator/voltdm: -517
[ 2.785642] cpu cpu0: cpu0 clock notifier not ready, retry
[ 2.791248] platform cpufreq-cpu0.0: Driver cpufreq-cpu0 requests probe deferral
[ 2.799303] PM: bootloader does not support rtc-only!
[ 2.804483] ThumbEE CPU extension supported.
[ 2.808802] Registering SWP/SWPB emulation handler
[ 2.815043] lis3_reg: disabling
[ 2.818207] vbat: disabling
[ 2.821109] regulator-dummy: disabling
[ 2.825505] Error: Driver 'tfp410' is already registered, aborting...
[ 2.834210] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 2.840917] [drm] No driver support for vblank timestamp query.
[ 2.891383] Console: switching to colour frame buffer device 60x34
[ 2.899278] tilcdc 4830e000.lcdc: fb0: frame buffer device
[ 2.904901] tilcdc 4830e000.lcdc: registered panic notifier
[ 2.910525] [drm] Initialized tilcdc 1.0.0 20121205 on minor 0
[ 2.917493] vwl1271: 1800 mV
[ 2.927678] tps65910 0-002d: No interrupt support, no core IRQ
[ 2.937967] vrtc: 1800 mV
[ 2.940988] vrtc: supplied by vbat
[ 2.946093] vio: at 1500 mV
[ 2.949067] vio: supplied by vbat
[ 2.954172] vdd_mpu: 912 <--> 1375 mV at 1325 mV
[ 2.958966] vdd_mpu: supplied by vbat
[ 2.964401] vdd_core: 912 <--> 1150 mV at 1137 mV
[ 2.969280] vdd_core: supplied by vbat
[ 2.974337] vdd3: 5000 mV
[ 2.978364] vdig1: at 1800 mV
[ 2.981520] vdig1: supplied by vbat
[ 2.986336] vdig2: at 1800 mV
[ 2.989467] vdig2: supplied by vbat
[ 2.994296] vpll: at 1800 mV
[ 2.997345] vpll: supplied by vbat
[ 3.002103] vdac: at 1800 mV
[ 3.005144] vdac: supplied by vbat
[ 3.009895] vaux1: at 1800 mV
[ 3.013027] vaux1: supplied by vbat
[ 3.017853] vaux2: at 3300 mV
[ 3.021006] vaux2: supplied by vbat
[ 3.025825] vaux33: at 3300 mV
[ 3.029035] vaux33: supplied by vbat
[ 3.033957] vmmc: 1800 <--> 3300 mV at 3300 mV
[ 3.038580] vmmc: supplied by vbat
[ 3.072707] lis3lv02d: 16 bits lis331dlh sensor found
[ 3.159906] input: ST LIS3LV02DL Accelerometer as /devices/platform/lis3lv02d/input/input1
[ 3.177457] omap_i2c 44e0b000.i2c: bus 0 rev0.11 at 400 kHz
[ 3.276981] mmc0: host does not support reading read-only switch. assuming write-enable.
[ 3.287320] mmc0: new high speed SD card at address 2bf0
[ 3.293252] mmcblk0: mmc0:2bf0 SD02G 1.87 GiB
[ 3.298966] mmcblk0: p1 p2
[ 3.340201] remoteproc0: wkup_m3 is available
[ 3.344675] remoteproc0: Note: remoteproc is still under development and considered experimental.
[ 3.353728] remoteproc0: THE BINARY FORMAT IS NOT YET FINALIZED, and backward compatibility isn't yet guaranteed.
[ 3.369220] remoteproc0: powering up wkup_m3
[ 3.389959] remoteproc0: Booting fw image am335x-pm-firmware.elf, size 154412
[ 3.397756] PM: CM3 Firmware Version = 0x190
[ 3.404097] remoteproc0: remote processor wkup_m3 is now up
[ 3.449568] davinci_mdio 4a101000.mdio: davinci mdio revision 1.6
[ 3.455690] davinci_mdio 4a101000.mdio: detected phy mask fffffffc
[ 3.472961] libphy: 4a101000.mdio: probed
[ 3.477049] davinci_mdio 4a101000.mdio: phy[0]: device 4a101000.mdio:00, driver Atheros 8031 ethernet
[ 3.486360] davinci_mdio 4a101000.mdio: phy[1]: device 4a101000.mdio:01, driver Atheros 8031 ethernet
[ 3.496594] cpsw 4a100000.ethernet: Detected MACID = c4:ed:ba:8b:33:fd
[ 3.504445] cpsw 4a100000.ethernet: cpsw: Detected MACID = c4:ed:ba:8b:33:ff
[ 3.513734] input: gpio_buttons@0 as /devices/gpio_buttons@0/input/input2
[ 3.521295] omap_rtc 44e3e000.rtc: setting system clock to 2000-01-01 00:01:26 UTC (946684886)
[ 3.532842] ALSA device list:
[ 3.535840] No soundcards found.
[ 3.564319] Freeing unused kernel memory: 20120K (c082d000 - c1bd3000)
init: applet not found
[ 3.589728] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000100
[ 3.589728]
[ 3.598916] drm_kms_helper: panic occurred, switching back to text console
[ 105.119511] random: nonblocking pool is initialized
