"Hi, I am having problems..."

I am trying to modify u-boot to call my custom function to decide whether to silence the console or allow it, by calculating the SHA-1 hash of an environment variable (password-based dev console). If my function is called, it succeeds, but all commandline comands report Unknown command, including "nboot" and "boot" which are part of the bootcmd.

My function source is in the /boards/myboard directory and called at the start of console_init_r() (I hacked a relative #include at the top of console.c)

I guess I am not understanding something like jump tables or memory/stack limits, and corrupting something.

To put as many people off as possible, I am starting with sources from Texas Instruments for the Davinci DM355 (ARM core), which is apparently based on u-boot 1.2.0. On this platform u-boot is loaded into DRAM from NAND flash by a separate first-stage loader.

I know this is nothing like the current u-boot version and don't expect anyone to spend much effort trying to support me, but I hoped someone might be able to say "ah yes, that sounds like you've simply xyz, you need to abc in your function" or point me at some relevant information.

Some example console output showing the failure:

---

this is MT29F16G08FAA device UBL: detected valid U-Boot magic number UBL: booting to U-Boot

U-Boot 1.2.0 (Nov 26 2008 - 10:25:47)

DRAM: 128 MB NAND: NAND device: Manufacturer ID: 0x2c, Chip ID: 0xd3 (Micron NAND 1GiB 3,3V 8-bit) Bad block table found at page 524224, version 0x01 Bad block table found at page 524160, version 0x01 nand_read_bbt: Bad block at 0x02420000 nand_read_bbt: Bad block at 0x02480000 nand_read_bbt: Bad block at 0x025c0000 NAND device: Manufacturer ID: 0x2c, Chip ID: 0xd3 (Micron NAND 1GiB 3,3V 8-bit) Bad block table found at page 524224, version 0x01 Bad block table found at page 524160, version 0x01 nand_read_bbt: Bad block at 0x0aa80000 2048 MiB Hashes matched - allow console In: serial Out: serial Err: serial ARM Clock :- 216MHz DDR Clock :- 171MHz Hit any key to stop autoboot: 0 Unknown command 'dhcp' - try 'help' Unknown command 'setenv' - try 'help' Unknown command 'tftp' - try 'help' Unknown command 'bootm' - try 'help' myboard #

-- Jon Povey, Design Engineer jon.povey@racelogic.co.uk | +44(0)1280 825983

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