Dear Brian Hutchinson,
In message y2o3d1967ab1004071745y111d704oda973290a7a4afa6@mail.gmail.com you wrote:
#if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE up_data = (end_addr_new + 1 - ((long)flash_addr_new + CFG_ENV_SIZE)); debug ("Data to save 0x%x\n", up_data); if (up_data) { if ((saved_data = malloc(up_data)) => = NULL) { printf("Unable to save the> rest of sector (%ld)\n", up_data); goto Done; } memcpy(saved_data, (void *)((long)flash_addr_> new + CFG_ENV_SIZE), up_data); debug ("Data (start 0x%x, len 0x%x) saved > at 0x%x\n", (long)flash_addr_new > + CFG_ENV_SIZE, up_data, s> aved_data); } #endif
... which to my understanding is intended to allow you to save RAM by using a env. smaller than your sector size which is my case.
This has nothing to do with saving RAM.
The thing is that with CFG_ENV_SECT_SIZE > CFG_ENV_SIZE, there might be important data in the part of the sector that is not occupied by the environment, so we must save and restore this content.
I've also tried to set CFG_ENV_SIZE to be the flash sector size which gets me over the above "Unable to save the rest of sector" problem but I suspect that I'm having RAM issues as I only have 128M RAM and am
128 MB of RAM is an awful lot.
trying to use two environments of 256k each and the problem I'm having then becomes when I try to nfs boot my board .... it just hangs.
Two copies of 256 kB each gives just a 0.4% of the available RAM - I don't understand why you think this might be a critical amount.
Best regards,
Wolfgang Denk