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arm linux系統啓動相關文章列表:
arm linux系統啓動流程 http://blog.csdn.net/u010872301/article/details/72615117
分析arm linux啓動打印信息 http://blog.csdn.net/u010872301/article/details/78779503
Linux kernel panic 問題解決方案 http://blog.csdn.net/u010872301/article/details/73928935
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{//-------------------------------啓動打印信息----------------------------------
{//u-boot環境變量設置：Ctrl+c
FS4412 # pri
baudrate=115200
bootargs=root=/dev/nfs nfsroot=192.168.9.120:/nfs/rootfs rw console=ttySAC2,115200 init=/linuxrc ip=192.168.9.9
bootcmd=tftp 41000000 uImage;tftp 42000000 exynos4412-fs4412.dtb;bootm 41000000 - 42000000
bootdelay=3
ethact=dm9000
ethaddr=11:22:33:44:55:66
gatewayip=192.168.9.1
ipaddr=192.168.9.9
netmask=255.255.255.0
serverip=192.168.9.120
stderr=serial
stdin=serial
stdout=serial
Environment size: 425/16380 bytes
}
{//u-boot啓動階段
U-Boot 2013.01 (Aug 24 2014 - 12:01:19) for FS4412
CPU: Exynos4412@1000MHz
Board: FS4412
DRAM: 1 GiB
WARNING: Caches not enabled
MMC: MMC0: 3728 MB
In: serial
Out: serial
Err: serial
MMC read: dev # 0, block # 48, count 16 ...16 blocks read: OK
eMMC CLOSE Success.!!
Checking Boot Mode ... EMMC4.41
Net: dm9000
Hit any key to stop autoboot: 3 2 1 0
dm9000 i/o: 0x5000000, id: 0x90000a46
DM9000: running in 16 bit mode
MAC: 11:22:33:44:55:66
operating at 100M full duplex mode
Using dm9000 device
TFTP from server 192.168.9.120; our IP address is 192.168.9.9 //對應bootcmd的 tftp 0x41000000 uImage
Filename 'uImage'.
Load address: 0x41000000
Loading: *#################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#######
69.3 KiB/s
done
Bytes transferred = 3028040 (2e3448 hex)
dm9000 i/o: 0x5000000, id: 0x90000a46
DM9000: running in 16 bit mode
MAC: 11:22:33:44:55:66
operating at 100M full duplex mode
Using dm9000 device
TFTP from server 192.168.9.120; our IP address is 192.168.9.9 //對應bootcmd的 tftp 42000000 exynos4412-fs4412.dtb
Filename 'exynos4412-fs4412.dtb'.
Load address: 0x42000000
Loading: *#######
393.6 KiB/s
done
Bytes transferred = 33876 (8454 hex)
Booting kernel from Legacy Image at 41000000 ...
Image Name: Linux-3.14.0
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 3027976 Bytes = 2.9 MiB
Load Address: 40008000
Entry Point: 40008000
Verifying Checksum ... OK
Flattened Device Tree blob at 42000000
Booting using the fdt blob at 0x42000000
Loading Kernel Image ... OK
Loading Device Tree to 4fff4000, end 4ffff453 ... OK
Starting kernel ... /*啓動內核（對應bootmcd的 bootm 41000000 - 42000000）
如果到這裏啓動失敗，可能原因
1.u-boot參數設置錯誤 如bootargs 中ttySAC2 設爲了ttySAC1
2.uImage 有問題。 換一個OK的試試，或把這個uImage放在別的板上驗證下
3.內核源碼有問題， 加打印信息跟蹤和打開內核調試信息開關， init\main.c start_kernel()
如machine type 不匹配
4.硬件相關，如u-boot初始CPU頻率，分頻不對
*/
*/
}
{//linux3.14內核啓動階段
Booting Linux on physical CPU 0xa00
//init\main.c start_kernel()
Linux version 3.14.0 (david@ubuntu) (gcc version 4.6.4 (crosstool-NG hg+default-2685dfa9de14 - tc0002) ) #23 SMP PREEMPT Fri Aug 15 11:30:16 CST 2014
CPU: ARMv7 Processor [413fc090] revision 0 (ARMv7), cr=10c5387d
CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine model: Insignal Origen evaluation board based on Exynos4412
Memory policy: Data cache writealloc
CPU EXYNOS4412 (id 0xe4412011)
Running under secure firmware.
PERCPU: Embedded 7 pages/cpu @eefb6000 s7424 r8192 d13056 u32768
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 256528
Kernel command line: root=/dev/nfs nfsroot=192.168.9.120:/nfs/rootfs rw console=ttySAC2,115200 init=/linuxrc ip=192.168.9.9 //內核對u-boot傳入的bootargs參數的解析
PID hash table entries: 4096 (order: 2, 16384 bytes)
Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
Memory: 1016852K/1032192K available (3956K kernel code, 237K rwdata, 1320K rodata, 231K init, 276K bss, 15340K reserved, 270336K highmem)
Virtual kernel memory layout:
vector : 0xffff0000 - 0xffff1000 ( 4 kB)
fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)
vmalloc : 0xf0000000 - 0xff000000 ( 240 MB)
lowmem : 0xc0000000 - 0xef800000 ( 760 MB)
pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB)
modules : 0xbf000000 - 0xbfe00000 ( 14 MB)
.text : 0xc0008000 - 0xc052f41c (5278 kB)
.init : 0xc0530000 - 0xc0569d00 ( 232 kB)
.data : 0xc056a000 - 0xc05a5540 ( 238 kB)
.bss : 0xc05a554c - 0xc05ea584 ( 277 kB)
SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
Preemptible hierarchical RCU implementation.
RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=4.
RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=4
NR_IRQS:16 nr_irqs:16 16
Exynos4x12 clocks: sclk_apll = 500000000, sclk_mpll = 800000000
sclk_epll = 96000000, sclk_vpll = 350000000, arm_clk = 1000000000
sched_clock: 32 bits at 200 Hz, resolution 5000000ns, wraps every 10737418240000000ns
Console: colour dummy device 80x30
Calibrating delay loop... 1992.29 BogoMIPS (lpj=4980736)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 2048 (order: 1, 8192 bytes)
Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes)
CPU: Testing write buffer coherency: ok
missing device node for CPU 0
missing device node for CPU 1
missing device node for CPU 2
missing device node for CPU 3
CPU0: thread -1, cpu 0, socket 10, mpidr 80000a00
Setting up static identity map for 0x403c0e10 - 0x403c0e68
CPU1: Booted secondary processor
CPU1: thread -1, cpu 1, socket 10, mpidr 80000a01
CPU2: Booted secondary processor
CPU2: thread -1, cpu 2, socket 10, mpidr 80000a02
CPU3: Booted secondary processor
CPU3: thread -1, cpu 3, socket 10, mpidr 80000a03
Brought up 4 CPUs
SMP: Total of 4 processors activated.
CPU: All CPU(s) started in SVC mode.
devtmpfs: initialized
VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4
pinctrl core: initialized pinctrl subsystem
regulator-dummy: no parameters
NET: Registered protocol family 16
DMA: preallocated 256 KiB pool for atomic coherent allocations
S3C Power Management, Copyright 2004 Simtec Electronics
EXYNOS4x12 PMU Initialize
EXYNOS: Initializing architecture
bio: create slab <bio-0> at 0
VMEM_VDD_2.8V: 2800 mV
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
s3c-i2c 13860000.i2c: slave address 0x00
s3c-i2c 13860000.i2c: bus frequency set to 19 KHz
sec_pmic 0-0066: No interrupt specified, no interrupts
VDD_ALIVE: failed to apply 1100000uV constraint
s5m8767-pmic s5m8767-pmic: regulator init failed for 0
s3c-i2c 13860000.i2c: i2c-0: S3C I2C adapter
Switched to clocksource mct-frc
NET: Registered protocol family 2
TCP established hash table entries: 8192 (order: 3, 32768 bytes)
TCP bind hash table entries: 8192 (order: 5, 163840 bytes)
TCP: Hash tables configured (established 8192 bind 8192)
TCP: reno registered
UDP hash table entries: 512 (order: 2, 24576 bytes)
UDP-Lite hash table entries: 512 (order: 2, 24576 bytes)
NET: Registered protocol family 1
RPC: Registered named UNIX socket transport module.
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
futex hash table entries: 1024 (order: 4, 65536 bytes)
bounce pool size: 64 pages
ROMFS MTD (C) 2007 Red Hat, Inc.
msgmni has been set to 1458
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
dma-pl330 12680000.pdma: Loaded driver for PL330 DMAC-1315632
dma-pl330 12680000.pdma: DBUFF-32x4bytes Num_Chans-8 Num_Peri-32 Num_Events-32
dma-pl330 12690000.pdma: Loaded driver for PL330 DMAC-1315632
dma-pl330 12690000.pdma: DBUFF-32x4bytes Num_Chans-8 Num_Peri-32 Num_Events-32
dma-pl330 12850000.mdma: Loaded driver for PL330 DMAC-1315632
dma-pl330 12850000.mdma: DBUFF-64x8bytes Num_Chans-8 Num_Peri-1 Num_Events-32
Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
13800000.serial: ttySAC0 at MMIO 0x13800000 (irq = 84, base_baud = 0) is a S3C6400/10
13810000.serial: ttySAC1 at MMIO 0x13810000 (irq = 85, base_baud = 0) is a S3C6400/10
13820000.serial: ttySAC2 at MMIO 0x13820000 (irq = 86, base_baud = 0) is a S3C6400/10
console [ttySAC2] enabled
13830000.serial: ttySAC3 at MMIO 0x13830000 (irq = 87, base_baud = 0) is a S3C6400/10
brd: module loaded
loop: module loaded
dm9000 5000000.ethernet: read wrong id 0x01010101
eth0: dm9000a at f0076000,f0078004 IRQ 167 MAC: 00:0a:2d:a6:55:a2 (platform data)
usbcore: registered new interface driver asix
usbcore: registered new interface driver ax88179_178a
usbcore: registered new interface driver cdc_ether
usbcore: registered new interface driver smsc75xx
usbcore: registered new interface driver smsc95xx
usbcore: registered new interface driver net1080
usbcore: registered new interface driver cdc_subset
usbcore: registered new interface driver zaurus
usbcore: registered new interface driver cdc_ncm
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
ehci-exynos: EHCI EXYNOS driver
usbcore: registered new interface driver usb-storage
mousedev: PS/2 mouse device common for all mice
input: 100a0000.keypad as /devices/100a0000.keypad/input/input0
device-mapper: ioctl: 4.27.0-ioctl (2013-10-30) initialised: [email protected]
sdhci: Secure Digital Host Controller Interface driver
sdhci: Copyright(c) Pierre Ossman
s3c-sdhci 12530000.sdhci: clock source 2: mmc_busclk.2 (40000000 Hz)
mmc0: no vqmmc regulator found
mmc0: SDHCI controller on samsung-hsmmc [12530000.sdhci] using ADMA
Synopsys Designware Multimedia Card Interface Driver
dwmmc_exynos 12550000.mmc: no vmmc regulator found: -19
dwmmc_exynos 12550000.mmc: Using internal DMA controller.
dwmmc_exynos 12550000.mmc: Version ID is 240a
dwmmc_exynos 12550000.mmc: DW MMC controller at irq 109, 32 bit host data width, 128 deep fifo
dwmmc_exynos 12550000.mmc: 1 slots initialized
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
TCP: cubic registered
NET: Registered protocol family 17
NET: Registered protocol family 15
Registering SWP/SWPB emulation handler
VMEM_VDD_2.8V: disabling
regulator-dummy: disabling
drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
mmc1: BKOPS_EN bit is not set
dm9000 5000000.ethernet eth0: link down
mmc_host mmc1: Bus speed (slot 0) = 50000000Hz (slot req 52000000Hz, actual 50000000HZ div = 0)
mmc_host mmc1: Bus speed (slot 0) = 100000000Hz (slot req 52000000Hz, actual 50000000HZ div = 1)
mmc1: new high speed DDR MMC card at address 0001
mmcblk0: mmc1:0001 4YMD3R 3.64 GiB
mmcblk0boot0: mmc1:0001 4YMD3R partition 1 4.00 MiB
mmcblk0boot1: mmc1:0001 4YMD3R partition 2 4.00 MiB
mmcblk0rpmb: mmc1:0001 4YMD3R partition 3 512 KiB
mmcblk0: p1 p2 p3 p4
mmcblk0boot1: unknown partition table
mmcblk0boot0: unknown partition table
dm9000 5000000.ethernet eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
IP-Config: Guessing netmask 255.255.255.0
IP-Config: Complete:
device=eth0, hwaddr=00:0a:2d:a6:55:a2, ipaddr=192.168.9.9, mask=255.255.255.0, gw=255.255.255.255
host=192.168.9.9, domain=, nis-domain=(none)
bootserver=255.255.255.255, rootserver=192.168.9.120, rootpath=
clk: Not disabling unused clocks
VFS: Mounted root (nfs filesystem) on device 0:10. /*掛載根文件系統（從 nfs filesystem知掛載的是NFS rootfs),也可掛載jffs2 ramdisk cramfs等格式rootfs
如果到這裏啓動失敗，可能原因
1. bootargs 參數設置用問題 ，如設置mtdblock2 寫成了mtdblock3, 或路徑，名稱不對等
2. 設爲nfs掛載，驗證rootfs內容有沒問題
3. 製作鏡像過程有沒問題
*/
devtmpfs: mounted
Freeing unused kernel memory: 228K (c0530000 - c0569000)
}
{//根文件系統階段（可運行應用程序）
[root@farsight ]# ls
a.out dev lib mnt root sys usr
bin etc linuxrc proc sbin tmp var
[root@farsight ]# ./a.out
hello
}
}