2012/8/24 Stefan Roese stefan.roese@gmail.com:
On 08/24/2012 06:42 PM, Daniel Schwierzeck wrote:
The u-boot image is merged with SPL image without any padding or fixed flash offsets to achieve a maximum reduction of flash footprint.
Interesting. I'm still padding to the fixed offset. Let me look into squeezing those two images together as well...
Looks good. One question though: How do you make sure, that your SPL image length is 4-byte aligned?
I have 4-byte alignments for each section and for each address symbol in my linker script. Actually all MIPS linker scripts do this.
Yes. I have those section alignments in the linker script as well. The problem is the end of the last (physical end in flash) section. If I have here a string with length 7 for example, the SPL binary has a non-4-byte aligned length.
Any ideas on this?
MIPS linker scripts have a symbol in front of the BSS section that is named uboot_end_data. I think most ARM linker scripts have it too but it is named __image_copy_end. This symbol is 4-byte-aligned. If I want to know the length of SPL image i can simply do
ulong len = (ulong) &__image_copy_end - CONFIG_SPL_TEXT_BASE
and len is 4-byte-aligned