November 2006 - U-Boot

[U-Boot-Users] U boot modification...
by Kiran Jammula 23 May '12

23 May '12

Hi, I am using U boot for my project. I need to configure the console while booting by prompting the user from target board LCD and Keypad. So please let me know which file of the U-boot I have to modify to achieve this. Kiran _________________________________________________________________ Special offer for NRIs! http://creative.mediaturf.net/creatives/citibankrca/rca_msntagofline.htm Get a zero balance account for next 20 years. From Citibank

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[U-Boot-Users] Ethernet loopback command
by Thomas Schäfer 17 Apr '12

17 Apr '12

Hi, The patch attached provides a command called 'ethloop' which allows to perform loopback testing on the current eth device. To achieve this, a new ethernet packet type (PROT_TEST, 0x0808, AFAIK this is not used otherwise) is introduced in net/net.c. The patch is against SF CVS from 20050307. The functions EthLoopStart, EthLoopSend and EthLoopHandler generate a simple ethernet frame with NetOurEther as destination address and packet type PROT_TEST. The looped back package is compared with the original one and a message is displayed. It is necessary to set the ethernet line into loopback mode either by programming the PHY or using a loopback plug. I've tested this on our PPC405 custom board, but it should also work on all other systems because packet generation is independent of the underlying ethernet hardware. Example usage: => mii w 0 0 7100 <-- sets PHY into loopback mode => ethloop Using ppc_405x_eth0 device Got ethernet loopback frame, len=64 loopback test successfully completed => mii w 0 0 8000 <-- PHY reset after test is completed Maybe this is also useful for others.. Best regards, Thomas Schäfer ____________________________________ Kontron Modular Computers GmbH Konrad-Zuse-Str. 9 66115 Saarbrücken Tel.: + 49 (0)681 / 95916 - 203 Fax: + 49 (0)681 / 95916 - 100 E-mail: thomas.schaefer(a)kontron.com

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[U-Boot-Users] Add a new command to U-Boot
by Carlos Filipe Silva 20 May '09

20 May '09

Hi all! I have one doubt. How can I add a new command to U-Boot? Do I have to use only the macro U_BOOT_CMD() like files .../common/cmd_* or do I have to do more things, like defines, etc.? And after this is compliled with no error, if I type help in U-Boot's shell, do I see this command like the others? Best regards, Carlos Silva

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[U-Boot-Users] [PATCH] part 2. Embedded PlanetBoards
by Jeff Mann 29 Nov '08

29 Nov '08

*CHANGELOG Added Support for Embedded Planet Boards EP852 EP866 and EP85xxm. See respective board config file for original author information. Merged from internal company port and QUICCstart kit into the most recent u-boot git by J. Mann, Embedded Planet, 2006-JUL-27. (this is part 2 of 2 split in half for size reasons.) (the first attempt to send this e-mail resulted in a message too big error. Sorry if you get two on acident)

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[U-Boot-Users] how to support usbtty
by zhuzhenhua 31 Aug '08

31 Aug '08

becides set CONFIG_USB_TTY, what other modification need to do for the usbtty support? thanks for any hints

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[U-Boot-Users] bootargs for partitioned nand flash
by Terence Soh 30 Apr '08

30 Apr '08

Hi, I'm trying to get a 64 MByte nand flash to be partitioned in a 32MB cramfs and 32MB jffs2 partition. In case anyone's curious, I would like the cramfs to be root as it would be a faster mount and its read-only feature. I tried to do this in the kernel by static struct mtd_partition partition_info[] = { [0] = { .name = "CRAM", .offset = 0, .size = 32 * 1024 * 1024, .mask_flags = MTD_WRITEABLE, /* force read-only */ }, [1] = { .name = "JFFS2", .offset = 32 * 1024 * 1024, .size = MTDPART_SIZ_FULL, } }; but when I cat/proc/mtd, I get / # cat /proc/mtd dev: size erasesize name mtd0: 04000000 00004000 "rootfs" so I realise that this is affected by the bootargs passed by u-bootloader which is "bootargs=console=ttyS0 mtdparts=a9m9750:0x4000000@0(rootfs) root=mtdblock/0 rootfstype=jffs2" How should I passed the bootargs? Thanks in advance, Terence.

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[U-Boot-Users] CramFS endianness
by Laurent Pinchart 04 Mar '08

04 Mar '08

Hi everybody, I recently had a problem with cramfs endianness. cramfs tools generates a host-endian file system, which was incompatible with my big-endian MPC8260 system. I patched mkcramfs to reverse the bit order, and was able to read the cramfs image from Linux. However, even though Linux doesn't do any byte swapping, U-Boot assumes little-endian byte order and swap bytes on big-endian architectures. Why is that ? U-Boot and Linux are clearly not compatible on big-endian architectures, and I'd like to fix the problem in the right place. Laurent Pinchart

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[U-Boot-Users] Linux kernel hang (infinite loop)
by Madhu Saravana Sibi Govindan 02 Jan '08

02 Jan '08

Hello all, I'm using U-boot to bring up a custom 440gp-based board. We are able to transfer the kernel image (uImage) to the target board's memory and jump to it. But, the kernel seems to hang after that. We have verified that the board info struct and the clock frequencies are ok. We also have a BDI2000 hardware debugger with us, but we are unable to set any breakpoints using this (both using telnet or using gdb). However, I can use the telnet interface and single-step the 440gp after it seems to hang. I found that 440gp is infinitely looping through the "DataTLBError" routine. It is unclear to me what might have caused this in the first place. Has anyone seen this behaviour before? We are currently working on getting breakpoints to work using the BDI2000. Any help is greatly appreciated. Regards, G.Sibi

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Re: [U-Boot-Users] boot up u-boot from RAM
by Nghiem, Tien 26 Nov '07

26 Nov '07

Lei, You have to rebuild your code to put your code in the RAM area (other than the FLASH area). Don't use the address 0x00-0x2fff because its reserved for the exception vectors usually. I have a Lite5200 EVB. I use the address 0x20000 to put my u-boot in RAM and it works. I don't know if it could be done for the mpc8270. Tien -----Original Message----- From: u-boot-users-bounces(a)lists.sourceforge.net [mailto:u-boot-users-bounces@lists.sourceforge.net]On Behalf Of Lei Sun Sent: Thursday, October 26, 2006 4:15 PM To: u-boot-users(a)lists.sourceforge.net Subject: [U-Boot-Users] boot up u-boot from RAM Hi all: I am debugging a costomized board based on mpc8270, due to the design flaw, we can't boot up the system using flash, so I was trying to debug u-boot by loading it into the RAM. I used JTAG debugger to initialize the SDRAM and load the u-boot to 0x0, after reset, the PC is at 0x100. the disassembled code looks correct on that location, however, i can't single step start from 0x100. Is that because 0x100 is the reset vector ? I tried to put some breakpoint at some places not far from start point, but it gave me "unknown halt at 0x00000000" error after "run" command. after that the memory seems corrupted. Too bad I was using a bad debugger(Guardian-SE), I have a evaluation copy of the codewarrior plus USB+TAP from freescale. I tried that on our PQ2FADS-VR SDK. After reset, and CPU halt, I can't see any disassembed code on 0x100 (the uboot is already in the flash, and I assume it should read data from CS0 upon reset). Although the code does execute after hitting "run" button. I wonder why can't I see the disassembed code after reset? Thanks lei ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ U-Boot-Users mailing list U-Boot-Users(a)lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/u-boot-users

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Re: [U-Boot-Users] adding support to new board
by Jeff Mann 26 Sep '07

26 Sep '07

See http://www.freescale.com/files/32bit/doc/app_note/AN3220.pdf -JM -----Original Message----- From: u-boot-users-bounces(a)lists.sourceforge.net [mailto:u-boot-users-bounces@lists.sourceforge.net] On Behalf Of Maximus Sent: Saturday, July 15, 2006 5:31 AM To: U-Boot-Users(a)lists.sourceforge.net Subject: [U-Boot-Users] adding support to new board Hi, Is there any document (step by step) approach on how to add u-boot support to a new board? any advices, Regards, jo ------------------------------------------------------------------------ - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ U-Boot-Users mailing list U-Boot-Users(a)lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/u-boot-users

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