Dear Guennadi Liakhovetski,
In message Pine.LNX.4.64.0809061015510.3731@axis700.grange you wrote:
Hence the question: shell we set GD_FLG_RELOC centrally really for all boards or are there boards out there that really must not have this flag set?
No matter how U-Boot starts up (whether it starts itself, for example by running in ROM/NOR flash rightout of the processor's reset, or if it gets loaded into RAM by some other mechanism), at a certain point in the initalization sequence, U-Boot will run out of RAM.
For regular implementations of U-Boot this is implemented in the board_init_r() function, and it is one of the first actions to be done in board_init_r() to add GD_FLG_RELOC to the global flags.
Any other implementation (including that for ARM) must also set GD_FLG_RELOC as soon as it reaches the code whis is run from RAM for all configurations; my understanding is that this is in start_armboot(), right after the global data has been initialized.
Best regards,
Wolfgang Denk