[#4600] pass console=null in kernel command string doesn't work on trunk

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[#4600] pass console=null in kernel command string doesn't work on trunk

Submitted By: Mingquan Pan

Open Date

2008-11-04 01:07:34     Close Date

2008-11-04 04:51:25


Medium     Assignee:



Closed     Fixed In Release:


Found In Release:

N/A     Release:


N/A     Board:



N/A     Silicon Revision:

Is this bug repeatable?:

Yes     Resolution:


Uboot version or rev.:

    Toolchain version or rev.:

Oct 10

App binary format:


Summary: pass console=null in kernel command string doesn't work on trunk



pass console=null in kernel command string doesn't work on trunk head kernel, it just still outputs to the default ttyBF0 device.


Linux version (test@46-bf561-gdbproxy) (gcc version 4.1.2 (ADI svn)) #6 Tue Nov 4 13:22:51 CST 2008

Warning: limiting memory to 56MB due to hardware anomaly 05000263

Board Memory: 64MB

Kernel Managed Memory: 64MB

Memory map:

  fixedcode = 0x00000400-0x00000490

  text      = 0x00001000-0x00109140

  rodata    = 0x00109140-0x0015bca8

  bss       = 0x0015bcc0-0x0016b058

  data      = 0x0016b058-0x0017a000

    stack   = 0x00178000-0x0017a000

  init      = 0x0017a000-0x004fc000

  available = 0x004fc000-0x037ff000

  DMA Zone  = 0x03f00000-0x04000000

Hardware Trace Active and Enabled

Reset caused by Software reset

Blackfin support (C) 2004-2008 Analog Devices, Inc.

Compiled for ADSP-BF537 Rev 0.2

Blackfin Linux support by   blackfin.uclinux.org/

Processor Speed: 500 MHz core clock and 100 MHz System Clock

boot memmap: 00000000004fc000 - 00000000037ff000 (usable)

On node 0 totalpages: 14335

  DMA zone: 112 pages used for memmap

  DMA zone: 0 pages reserved

  DMA zone: 14223 pages, LIFO batch:3

  Normal zone: 0 pages used for memmap

  Movable zone: 0 pages used for memmap

NOMPU: setting up cplb tables for global access

Instruction Cache Enabled

Data Cache Enabled (write-through)

Built 1 zonelists in Zone order, mobility grouping off.  Total pages: 14223

Kernel command line: console=ttyBF0,57600 console=null ip=

Configuring Blackfin Priority Driven Interrupts

PID hash table entries: 256 (order: 8, 1024 bytes)

console [ttyBF0] enabled

Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)

Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)

Kernel managed physical pages: 14335

Memory available: 51656k/65536k RAM, (3592k init code, 1056k kernel code, 452k data, 1024k dma, 7756k reserved)

Calibrating delay loop... 997.37 BogoMIPS (lpj=1994752)

Security Framework initialized

Mount-cache hash table entries: 512

Blackfin Scratchpad data SRAM: 4 KB

Blackfin L1 Data A SRAM: 16 KB (15 KB free)

Blackfin L1 Data B SRAM: 16 KB (16 KB free)

Blackfin L1 Instruction SRAM: 48 KB (41 KB free)

net_namespace: 192 bytes

NET: Registered protocol family 16

Blackfin GPIO Controller

Blackfin DMA Controller

stamp_init(): registering device resources

NET: Registered protocol family 2

IP route cache hash table entries: 1024 (order: 0, 4096 bytes)

TCP established hash table entries: 2048 (order: 2, 16384 bytes)

TCP bind hash table entries: 2048 (order: 1, 8192 bytes)

TCP: Hash tables configured (established 2048 bind 2048)

TCP reno registered

NET: Registered protocol family 1

Setting up Blackfin MMR debugfs

msgmni has been set to 100

io scheduler noop registered

io scheduler anticipatory registered (default)

io scheduler cfq registered

Serial: Blackfin serial driver

bfin-uart.1: ttyBF0 at MMIO 0xffc00400 (irq = 18) is a BFIN-UART

brd: module loaded

bfin_mac_mdio: probed

bfin_mac: attached PHY driver [SMSC LAN83C185] (mii_bus:phy_addr=0:01, irq=-1, mdc_clk=2500000Hz(mdc_div=19)@sclk=100MHz)

bfin_mac bfin_mac.0: Blackfin on-chip Ethernet MAC driver, Version 1.1

bfin-spi bfin-spi.0: Blackfin BF5xx on-chip SPI Controller Driver, Version 1.0, regs_base@ffc00500, dma channel@7

rtc-bfin rtc-bfin: rtc core: registered rtc-bfin as rtc0

bfin-wdt: initialized: timeout=20 sec (nowayout=0)

TCP cubic registered

NET: Registered protocol family 17

rtc-bfin rtc-bfin: setting system clock to 1970-01-01 21:37:32 UTC (77852)

IP-Config: Guessing netmask

IP-Config: Complete:

     device=eth0, addr=, mask=, gw=,

     host=, domain=, nis-domain=(none),

     bootserver=, rootserver=, rootpath=

Freeing unused kernel memory: 3592k freed

dma_alloc_init: dma_page @ 0x004f9000 - 256 pages at 0x03f00000

PHY: 0:01 - Link is Up - 100/Full







--- Mike Frysinger                                           2008-11-04 01:52:17

console is cumulative.  your command line has:

console=ttyBF0,57600 console=null ip=...


so it's working fine


--- Mingquan Pan                                             2008-11-04 04:51:25

Yes, I made a mistake here. Sorry.Close.












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