August 2007 - 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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Re: [U-Boot-Users] NAND boot from file
by Charles Krinke 06 Mar '09

06 Mar '09

Dear Wolfgang: >Um... if this is JFFS2, then why not simply "fsload" + "bootm" ? Although I can format the flash in Linux and run fsinfo, ls or fsload in u-boot, there is a time of several minutes after Scanning JFFS2 FS Before ls can find the directory or fsload can attempt to load the uImage file. I am thinking that the 'flash_eraseall -j' command I am using may not be quite setup correctly with the u-boot environment. It should not take several minutes to pull a directory off a formatted flash. Here is what I do: Linux# flash_eraseall -j /dev/mtd0 Linux# mount -t jffs2 /dev/mtdblock0 /mnt/flash1 Linux# cp /uImage /mnt/flash1 Linux# ls /mnt/flash1 uImage is here, now reboot uboot> ls uImage is here, but it takes several minutes to get the listing. Fsload takes several minutes also. Can you think of what other assumptions I may be making that may be invalid? Charles

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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] [MPC82xx] Fixes for MPC8272
by Wolfgang Denk 26 Apr '08

26 Apr '08

The following changes since commit 14da5f7675bbb427c469e3f45006e027b6e21db9: Wolfgang Denk (1): Cleanup compiler warnings, update CHANGELOG are found in the git repository at: git://www.denx.de/git/u-boot-mpc82xx.git Heiko Schocher (1): [MPC826x] update defines in include/mpc8260.h for the MPC8272 family include/mpc8260.h | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 files changed, 89 insertions(+), 1 deletions(-) Please help testing this code. If there are no complaints, it will be merged into the master repo in aboutr 3 weeks from now. Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, HRB 165235 Munich, CEO: Wolfgang Denk Office: Kirchenstr. 5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd(a)denx.de "If God had wanted us to use the metric system, Jesus would have had 10 apostles."

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[U-Boot-Users] [Patch] Disable icache before call the first line of kernel in do_bootelf().
by Sonic Zhang 14 Apr '08

14 Apr '08

On some architecture, it is not save to call the first line of kernel without disable the instruction cache. For do_bootm() path, architecture specific library code do_bootm_linux() can adress this issue, but do_bootelf() is common code. This patch disables icache before call kernel. Signed-off-by: Sonic Zhang <sonic.zhang(a)gmail.com> Index: common/cmd_elf.c =================================================================== --- common/cmd_elf.c (revision 871) +++ common/cmd_elf.c (working copy) @@ -65,6 +65,8 @@ */ if (dcache_status ()) dcache_disable (); + if (icache_status ()) + icache_disable (); /* pass cmdline to the kernel. */ cmdline = make_command_line();

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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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