[U-Boot-Users] Difference between bootm and run flash_self commands
Senthil Shanmugham
neorebel at gmail.com
Tue Mar 13 15:43:25 CET 2007
Hi All,
I was wondering about the difference between the bootm and run flash_self
commands. I understand that bootm command uncompresses and boots the kernel
from a given memory location. The board hangs when I try to use bootm
command to load the kernel whereas it works perfectly when I use "run
flash_self" command.
The environment variables is same for both the scenarios. I've included the
environment variables as well as command outputs below.
Enviroment variables
==================
=> printenv
bootcmd=run flash_self
baudrate=115200
loads_echo=1
preboot=echo;echo Type "run flash_nfs" to mount root filesystem over
NFS;echo
netdev=eth0
hostname=taishan
nfsargs=setenv bootargs root=/dev/nfs rw nfsroot=${serverip}:${rootpath}
ramargs=setenv bootargs root=/dev/ram rw
addip=setenv bootargs ${bootargs}
ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}:$1addtty=setenv
bootargs ${bootargs} console=ttyS1,${baudrate}
flash_nfs=run nfsargs addip addtty;bootm ${kernel_addr}
flash_self=run ramargs addip addtty;bootm ${kernel_addr} ${ramdisk_addr}
net_nfs=tftp 200000 ${bootfile};run nfsargs addip addtty;bootm
rootpath=/opt/eldk/ppc_4xx
load=tftp 100000 /tftpboot/taishan/u-boot.bin
update=protect off fffc0000 ffffffff;era fffc0000 ffffffff;cp.b 100000
fffc0000 40000;setenv filvupd=run load;run update
fixedip=setenv bootargs $(bootargs)
ip=$(ipaddr):$(serverip):$(gatewayip):$(netmask):$(hostname)1dhcp=setenv
bootargs $(bootargs) ip=dhcp
kozio=bootm 0xffe00000
ethaddr=00:0c:4f:35:00:02
eth1addr=00:0c:4f:35:00:03
bootdelay=10
bootfile=uImage
ethact=ppc_4xx_emac2
stdin=serial
stdout=serial
stderr=serial
ver=U-Boot 1.1.4 (Oct 17 2006 - 18:06:51)
kernel_addr=0x600000
ramdisk_addr=0x800000
fileaddr=800000
ipaddr=192.168.1.62
serverip=192.168.1.155
Environment size: 1321/16380 bytes
=>
bootm command
==============
I can't boot my kernel when I use bootm <kernel_addr> <ramdisk_addr>. It
hangs after printing the following message.
=> bootm 0x600000 0x800000
## Booting image at 00600000 ...
Image Name: Linux-2.6.16.16
Image Type: PowerPC Linux Kernel Image (gzip compressed)
Data Size: 1171270 Bytes = 1.1 MB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
Uncompressing Kernel Image ... OK
## Loading RAMDisk Image at 00800000 ...
Image Name: Taishan Ramdisk
Image Type: PowerPC Linux RAMDisk Image (gzip compressed)
Data Size: 1198898 Bytes = 1.1 MB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
Loading Ramdisk to 0fd8d000, end 0feb1b32 ... OK
run flash_self
===========
The system boots without any problems when I use the run flash_self command
with the following value.
=> run flash_self
## Booting image at 00600000 ...
Image Name: Linux-2.6.16.16
Image Type: PowerPC Linux Kernel Image (gzip compressed)
Data Size: 1171270 Bytes = 1.1 MB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
Uncompressing Kernel Image ... OK
## Loading RAMDisk Image at 00800000 ...
Image Name: Taishan Ramdisk
Image Type: PowerPC Linux RAMDisk Image (gzip compressed)
Data Size: 1198898 Bytes = 1.1 MB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
Loading Ramdisk to 0fd8d000, end 0feb1b32 ... OK
Linux version 2.6.16.16 (root at linux_box) (gcc version 4.0.0 (DENX ELDK 4.0
4.0.0)) #8 Wed Oct 186AMCC Taishan Board .............................
Built 1 zonelists
Kernel command line: root=/dev/ram rw
ip=192.168.1.62:192.168.1.155:::taishan:eth0:off
panic=1 c0PID hash table entries: 2048 (order: 11, 32768 bytes)
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Memory: 255872k available (1792k kernel code, 568k data, 132k init, 0k
highmem)
Mount-cache hash table entries: 512
checking if image is initramfs...it isn't (no cpio magic); looks like an
initrd
Freeing initrd memory: 1170k freed
NET: Registered protocol family 16
PCI: Probing PCI hardware
JFFS2 version 2.2. (NAND) (SUMMARY) (C) 2001-2003 Red Hat, Inc.
io scheduler noop registered
io scheduler anticipatory registered (default)
io scheduler deadline registered
io scheduler cfq registered
Serial: 8250/16550 driver $Revision: 1.1.1.1 $ 4 ports, IRQ sharing enabled
serial8250: ttyS0 at MMIO 0x0 (irq = 0) is a 16550A
serial8250: ttyS1 at MMIO 0x0 (irq = 1) is a 16550A
RAMDISK driver initialized: 16 RAM disks of 65536K size 1024 blocksize
PPC 4xx OCP EMAC driver, version 3.54
mal0: initialized, 4 TX channels, 4 RX channels
rgmii0: input 0 in RGMII mode
eth0: emac2, MAC 00:0c:4f:35:00:02
eth0: found ET1011C Gigabit Ethernet PHY (0x01)
rgmii0: input 1 in RGMII mode
eth1: emac3, MAC 00:0c:4f:35:00:03
eth1: found ET1011C Gigabit Ethernet PHY (0x03)
e100: Intel(R) PRO/100 Network Driver, 3.5.10-k2-NAPI
e100: Copyright(c) 1999-2005 Intel Corporation
PPP generic driver version 2.4.2
NET: Registered protocol family 24
TAISHAN flash mapping: Found 2 x16 devices at 0x0 in 32-bit bank
Amd/Fujitsu Extended Query Table at 0x0040
TAISHAN flash mapping: CFI does not contain boot bank location. Assuming
top.
number of CFI chips: 1
cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.
Creating 5 MTD partitions on "TAISHAN flash mapping":
0x00000000-0x00180000 : "Kernel"
0x00180000-0x00380000 : "Ramdisk"
0x00380000-0x03e00000 : "FlashFS"
0x03e00000-0x03f80000 : "kDiags"
0x03f80000-0x04000000 : "U-Boot"
i2c /dev entries driver
IBM IIC driver v2.1
ibm-iic0: using standard (100 kHz) mode
ibm-iic1: using standard (100 kHz) mode
NET: Registered protocol family 2
IP route cache hash table entries: 4096 (order: 2, 16384 bytes)
TCP established hash table entries: 16384 (order: 4, 65536 bytes)
TCP bind hash table entries: 16384 (order: 4, 65536 bytes)
TCP: Hash tables configured (established 16384 bind 16384)
TCP reno registered
TCP bic registered
NET: Registered protocol family 1
NET: Registered protocol family 17
eth0: link is down
IP-Config: Guessing netmask 255.255.255.0
IP-Config: Complete:
device=eth0, addr=192.168.1.62, mask=255.255.255.0, gw=255.255.255.255
,
host=taishan, domain=, nis-domain=(none),
bootserver=192.168.1.155, rootserver=192.168.1.155, rootpath=
RAMDISK: Compressed image found at block 0
VFS: Mounted root (ext2 filesystem).
Freeing unused kernel memory: 132k init
eth0: link is up, 100 FDX, pause enabled
AMCC Startup utility launched.
BusyBox v1.2.1 (2006.10.19
Please press Enter to activate this console.
BusyBox v1.2.1 (2006.10.19-23:15+0000) Built-in shell (ash)
Enter 'help' for a list of built-in commands.
~ #
I appreciate for your time and help.
Thanks,
Senthil
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