Thanks for information, Guys. I appreciate it.
Best Regards, Daniel (Youngwhan) Song 2009/12/16 hmthalib <[email protected]> > chiachen wrote: > > Oh, I just know a littel about it ,not in details. If you want to know > > how, you'd better read the source code of the kernel, like setup.asm > > main.c directly. In a fast way, you could seach some articles about how > > kernel start. > > Sorry, I can't give you help detaily. > > > > ------------------------------------------------------------------------ > > *发件人：*"Daniel (Youngwhan) Song " <mailto:[email protected]> > > *发送日期：*2009-12-16 10:23 > > *收件人：*chiachen <mailto:[email protected]> > > *抄送：*[email protected] <mailto:[email protected]> > > *主题：* Re: Boting error in freescale board > > Thanks, Chiachen, > > > > But, what I want to know is how the kernel knows the parameters at the > > beginning before mounting the root file system? > > > > Best Regards, > > Daniel (Youngwhan) Song > > > > > > > > 2009/12/15 chiachen <[email protected] <mailto:[email protected]>> > > > > The parameter in the command line is transferred to the kernel > > firstly, when the file system is mounted, they are transferred to > > /proc/cmdline. Other shell script need the parameter will > > analysis it later. > > > > > ------------------------------------------------------------------------ > > *发件人：*Daniel (Youngwhan) Song <mailto:[email protected]> > > *发送日期：*2009-12-16 09:40 > > *收件人：*abhijeet tripathi <mailto:[email protected]> > > *抄送：*[email protected] > > <mailto:[email protected]> Niamathullah sharief > > <mailto:[email protected]> > > *主题：* Re: Boting error in freescale board > > > > Just a quick question. > > > > How is "console" booting parameter transferred to linux? Could > > somebody point me out good docs for it, please? > > > > Thanks, > > > > Best Regards, > > Daniel (Youngwhan) Song > > > > > > > > On Tue, Dec 15, 2009 at 6:15 AM, abhijeet tripathi > > <[email protected] > > <mailto:[email protected]>> wrote: > > > > > > --- On Tue, 15/12/09, Niamathullah sharief <[email protected] > > <mailto:[email protected]>> wrote: > > > > > From: Niamathullah sharief <[email protected] > > <mailto:[email protected]>> > > > Subject: Boting error in freescale board > > > To: [email protected] > > <mailto:[email protected]> > > > Date: Tuesday, 15 December, 2009, 3:22 PM > > > Hello, > > > ?�i am used pegetron freescale processor > > > > > board. it that when i enter into minicom its not getting the > > > correct booting....see this what i am getting . > > > > > > ar...@ariem-desktop:~$ minicom -s > > > > > > > > > > > > Welcome to minicom 2.3 > > > > > > OPTIONS: I18n > > > Compiled on Oct 24 2008, 06:37:44. > > > Port /dev/ttyUSB0 > > > > > > ????????�Press CTRL-A Z for help on special keys > > > > > > > > > > > > > > > > > ++Initializing SPI-NOR flash... > > > > > > JEDEC ID: 0xbf:0x25:0x4a > > > > > > SPI NOR: block_size=0x10000, blocks=0x40, start=0x00000000, > > > end=0x00400000 > > > > > > ... Read from 0x1fef0000-0x1ff00000 at 0x00080000: . > > > ... Read from 0x1fee3000-0x1fee4000 at 0x0008f000: . > > > PMIC ID: 0x000041d0 [Rev: 2.0] > > > [Warning] FEC not connect right PHY: ID=0 > > > FEC: [ HALF_DUPLEX ] [ disconnected ] [ 10M bps ]: > > > > > > Ethernet mxc_fec: MAC address 00:00:45:67:89:ab > > > No IP info for device! > > > > > > Reset reason: Power-on reset > > > fis/fconfig from SPI-NOR > > > Boot switch: INTERNAL > > > > > > ????EXPANSION: SPI-NOR: eCSPI1 > > > > > > RedBoot(tm) bootstrap and debug environment [ROMRAM] > > > Non-certified release, version FSL 200910_P1 - built > > > 16:07:20, Jul 15 2009 > > > > > > Platform: MX51 Babbage (Freescale i.MX51 based) PASS 2.0 > > > [x32 DDR] > > > > > > Copyright (C) 2000, 2001, 2002, 2003, 2004 Red Hat, Inc. > > > Copyright (C) 2003, 2004, 2005, 2006 eCosCentric Limited > > > > > > RAM: 0x00000000-0x1ff00000, [0x00094fb8-0x1fee1000] > > > available > > > FLASH: 0x00000000 - 0x400000, 64 blocks of 0x00010000 bytes > > > each. > > > > > > == Executing boot script in 1.000 seconds - enter ^C to > > > abort > > > RedBoot> pmic 15 0x00400022 > > > ????val: 0x00400022 > > > > > > RedBoot> mfill -b 0x73f88000 -p 0x01025200 -l 0x04 -4 > > > RedBoot> mfill -b 0x73f84000 -p 0x20 -l 0x04 -4 > > > > > > RedBoot> fis load kernel > > > ... Read from 0x1fef0000-0x1feff000 at 0x00080000: . > > > ... Read from 0x00100000-0x00380000 at 0x00100000: . > > > RedBoot> e -c "root=/dev/sda1 ro quite > > > splash" > > > entry=0x90008000, target=0x90008000 > > > > > > Using base address 0x00100000 and length 0x00280000 > > > Uncompressing > > > > > > Linux.................................................................................................................................. > > > > IIRC, you need to pass "console=<UART>,<BAUD-RATE>" �in your > > kernel command line. > > e.g.: console=ttyS0,115200n8 > > > > > done, bo. > > > > > > > > > after this i am not getting anything.what to > > > do? > > > > > > > Best regards, > > Abhijeet > > > > > > ??�The INTERNET now has a personality. YOURS! See your Yahoo! > > Homepage. http://in.yahoo.com/ > > > > > > -- > > To unsubscribe from this list: send an email with > > "unsubscribe kernelnewbies" to [email protected] > > <mailto:[email protected]> > > Please read the FAQ at http://kernelnewbies.org/FAQ > > > > > > > > > > > Hi, > > To know this you have to read the code of boot loader in your case it is > redboot. normally the bootloader will put all this information in the > RAM somewhere and pass the address and size to the kernel. > > Not sure about the redboot, but in u-boot not only the kernel cmdline > parameters are passed it passes a big structure with lots of low level > data's to the kernel > > -- > Regards, > Mohamed Thalib H > > -- > To unsubscribe from this list: send an email with > "unsubscribe kernelnewbies" to [email protected] > Please read the FAQ at http://kernelnewbies.org/FAQ > >
