November 2004 - U-Boot

[U-Boot-Users] porting to custom at 91 board
by Z.N. 22 Nov '04

22 Nov '04

Dear developers! As some advised, instead of trying to write a boot loader for a custom AT91 board, I wanted to use the loader.bin and u-boot.bin from ATMEL. However, after transferring loader.bin, the 'C'-s appear, however, I cannot transfer u-boot.bin, because Hyper terminal displays some "Error limit exceeded" message. (I've also tried with minicom, it gives a couple of NAK messages when transferring u-boot.bin). What can be the error? My board is more or less the same as at19rm9200dk, however it has only 1 chip of 16 bit SDRAM connected instead of 2 chips (so the data bus is only 16 bits wide, and memory timings are different). Can this cause a problem? My alternate question is, how to port u-boot, so that I can start it in RAM with the above configuration (I've got a small boot loader done in assembly, which is loaded from SPI on startup. So I could store u-boot in the SPI flash, and load it to RAM from there on startup by my small boot loader. how to do this? eg. where to load the u-boot image in RAM? I guess I have to also adjust the SDRAM setup and timings which are differing from the atmel DK.). have anyone ported u-boot to such a configuration? I'd be grateful if you could give me any pointers on this problem. Best Regards, Zo

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RE: [U-Boot-Users] start.S code snippet doubt
by VanBaren, Gerald (AGRE) 22 Nov '04

22 Nov '04

> -----Original Message----- > From: u-boot-users-admin(a)lists.sourceforge.net > [mailto:u-boot-users-admin@lists.sourceforge.net] On Behalf > Of Nishant Galange > Sent: Monday, November 22, 2004 8:52 AM > To: u-boot-users(a)lists.sourceforge.net > Subject: [U-Boot-Users] start.S code snippet doubt > > Hi all, > > What does the following code achieve: (Code snippet from start.S) > boot_cold: > #if defined(CONFIG_MPC8260ADS) > lis r3, CFG_DEFAULT_IMMR@h > nop > lwz r4, 0(r3) > nop > rlwinm r4, r4, 0, 8, 5 > nop > oris r4, r4, 0x0200 > nop > stw r4, 0(r3) > nop > #endif /* CONFIG_MPC8260ADS */ > > Can anyone please tell me the importance/significance of this code? > > Regards, > Nishant That is a good question. I was wondering the same thing (I think you asked this before). Doing some decoding, I come up with the following... CFG_DEFAULT_IMMR is defined if the boot IMMR is not set to a good value (the unfortunate default of Motorola/Freescale MPC8260ADS and related eval boards). This factoid appears to be immaterial, but is imporant if you don't have CFG_DEFAULT_IMMR defined (e.g. you already have a good IMMR configuration) because the code screws up in that case. I had changed the #if conditional in my "lowboot" patch for the PQ2FADS board, but that is not right based on my decoding below. I need to fix it and resubmit my patch I think. Comments on the code in question: lis r3, CFG_DEFAULT_IMMR@h ; r3 points to the registers in the IMMR region nop lwz r4, 0(r3) ; Get SIUMCR nop rlwinm r4, r4, 0, 8, 5 ; Mask out (zero) L2CPC nop oris r4, r4, 0x0200 ; Set L2CPC = 2b10, multiplexing BADDR(29-31) nop stw r4, 0(r3) nop This looks like CPU and board specific initialization, selecting the 3 LSBits of bus addressing to go out the related processor pins (other alternatives are cache control lines or interrupt lines IRQ2-5). Please correct me if I'm wrong :-/ gvb ****************************************** The following messages are brought to you by the Lawyers' League of IdioSpeak: ****************************************** The information contained in, or attached to, this e-mail, may contain confidential information and is intended solely for the use of the individual or entity to whom they are addressed and may be subject to legal privilege. If you have received this e-mail in error you should notify the sender immediately by reply e-mail, delete the message from your system and notify your system manager. Please do not copy it for any purpose, or disclose its contents to any other person. The views or opinions presented in this e-mail are solely those of the author and do not necessarily represent those of the company. The recipient should check this e-mail and any attachments for the presence of viruses. The company accepts no liability for any damage caused, directly or indirectly, by any virus transmitted in this email. ******************************************

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[U-Boot-Users] Problems with udelay() on AT91RM9200 !
by Steven Scholz 22 Nov '04

22 Nov '04

Hi there, I just noticed that the implementation of udelay() - i.e udelay_masked() - resets the timer. Why is that? This prevents me from doing something like start = get_timer(0); /* get current time */ do { if ( get_timer(start) > timeout) { puts(" TIMEOUT!"); break; } putc('.'); udelay(100000); } while (1); :-( -- Steven

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[U-Boot-Users] Remote Kermit Not Responding
by Rodel Miguel 22 Nov '04

22 Nov '04

Hi, I need help on downloading binary image from host to the board where I am porting U-Boot. My host is Windoze XP and I downloaded the freeware version of kermit terminal emulation tool. I can now execute some commands successfully, e.g. go, printenv, help, etc. However, when I try to download a binary image using kermit's send, and typing loadb to the serial console, the message "Remote Kermit Not Responding" is logged on the terminal. When I type ^C, the message states that I have downloaded 0 bytes. What could be causing this problem? What U-Boot configuration might I have missed out? What part of the U-boot code should I be looking at if my configuration is correct? Thank you very much and best regards, Rodel Miguel

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[U-Boot-Users] Paged memory?
by kyle rhodes 22 Nov '04

22 Nov '04

Hi, We are developing a custom board using the Blackfin processor and would like to use U-boot if possible. We have 8 Meg of flash that is split into 8 * 1 Meg pages, the pages being controlled by some programmable io pins. Is this sort of memory architecture supported by u-boot? Thanks

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[U-Boot-Users] Adding command in the u-boot
by Vikrant_Basotra 21 Nov '04

21 Nov '04

Hi All, I have added a small piece of code in the file common/command.c in order to add a new command in the u-boot. Snippet of code added is given below. Will this code add the command fst_cmd in the u-boot or I have to make some change some where else in the code. If yes, then tell me where I have to make the change in the u-boot code in order to make this code work. int do_version (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) { printf ("\nTest Command\n"); return 0; } U_BOOT_CMD( fst_cmd, 1, 1, do_fst_cmd, "Test command added successfully \n", NULL ); Best Regards, Vikrant Basotra ************************************************************************** This email (including any attachments) is intended for the sole use of the intended recipient/s and may contain material that is CONFIDENTIAL AND PRIVATE COMPANY INFORMATION. Any review or reliance by others or copying or distribution or forwarding of any or all of the contents in this message is STRICTLY PROHIBITED. If you are not the intended recipient, please contact the sender by email and delete all copies; your cooperation in this regard is appreciated. **************************************************************************

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[U-Boot-Users] Uboot over Redboot
by Srivatsan 20 Nov '04

20 Nov '04

Hi all, We are in the process of comparing Redboot and Universal Boot Loader. My feeling is that Universal boot loader offers more functionalities (POST, active support (pampered by Mr.Wolfgang :-)) and GPL) rather than Redboot. But is there any heavy weighing :-) difference (with respect to performance, size) which will enable me to convince people out here. Please help me with this. With Thanks and Best Regards, C.R.Srivatsan ********************************DISCLAIMER********************************** This e-mail and any attachment is for authorised use by the intended recipient(s) only. It may contain proprietary material, confidential information and/or be subject to legal privilege of Deccanet Designs Ltd. If you have received this message in error, please notify the originator immediately. If you are not the intended recipient, you are notified that you are strictly prohibited from retaining, using, copying, altering or disclosing the contents of this message. ****************************************************************************

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[U-Boot-Users] U-boot and Lubbock framebuffer
by Francesco Vozza 20 Nov '04

20 Nov '04

Hi all, I want to use u-boot on an Intel DBPXA250 (Lubbock) platform to run a 2.4.19-rmk7-pxa2 linux kernel, but I'm experiencing problems when kernel starts and tries to switch the console to the framebuffer device (80x30). Until this point I can see booting messages on the LCD display, then everything hangs. If I disable the framebuffer console the kernel works. Since I don't experience this problem with redboot, I was wondering if it could be something in the LCD initialization code in u-boot that could cause later kernel hang when dealing with fb. Does anybody experience similar problems with u-boot on lubbock or have some tips that could help me? Thanks. Francesco

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[U-Boot-Users] u-boot can not boot after change flashdisk from 8M to 16M
by Tyler Jia 19 Nov '04

19 Nov '04

Hello, Because need more flash disk space, I replace ppc405ep board flashdisk 8M (intel 28F640j3 8MByte=64Mbite= 128k x 64) to 16M flashdisk (intel 28F128j3 16Mbyte=128Mbit=128k x 128). I try to use the working u-boot.bin which is for 8M flashdisk to boot the 16M flash disk, I use BDI/JTAG to write u-boot.bin in ppc405ep 16M flash memory, erase, write and read data workes and looks correct. it failed boot. when power on, nothing happened. where should I chnage in the u-boot source code from 8M flash memory to 16M flash memory? before the 8M flashdisk memory is from ff800000-ffffffff, u-boot.bin image address is from fffe0000-ffffffff, then the new 16M flashdisk is from ff000000-ffffffff, I still put the u-boot.bin in fffe0000-ffffffff in 16M flash memory. Thanks Tyler __________________________________ Do you Yahoo!? The all-new My Yahoo! - Get yours free! http://my.yahoo.com

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[U-Boot-Users] u-boot can not boot after change flashdisk from 8M to 16M
by Tyler Jia 19 Nov '04

19 Nov '04

Hello, Because need more flash disk space, I replace ppc405ep board flashdisk 8M (intel 28F640j3 8MByte=64Mbite= 128k x 64) to 16M flashdisk (intel 28F128j3 16Mbyte=128Mbit=128k x 128). I try to use the working u-boot.bin which is for 8M flashdisk to boot the 16M flash disk, I use BDI/JTAG to write u-boot.bin in ppc405ep 16M flash memory, erase, write and read data workes and looks correct. it failed boot. when power on, nothing happened. where should I chnage in the u-boot source code from 8M flash memory to 16M flash memory? before the 8M flashdisk memory is from ff800000-ffffffff, u-boot.bin image address is from fffe0000-ffffffff, then the new 16M flashdisk is from ff000000-ffffffff, I still put the u-boot.bin in fffe0000-ffffffff in 16M flash memory. Thanks Tyler __________________________________ Do you Yahoo!? Meet the all-new My Yahoo! - Try it today! http://my.yahoo.com

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