Hi Folks!
I am trying to improve boot time of my linux system on my motorola i.MX system as much as possible. Therefore I tried to omit the copying and decompressing the linux kernel image ba using XIP, but the code runs slower in the (slower) flash and boot time increased.
I wonder how to make use of sync burst mode with u-boot in conjunction eith linux. Today I switched on CFG_CMD_CACHE (I use u-boot-1.1.1) but I wonder if u-boot knows that it should cache the area above 0x10000000.
Hm... I think the way the linux kernel starts itself is not making use of any implementation of burst mode of the flash device. It copies a small amount of bytes and decompresses them. Could it be possible to make use of burst mode by copying the compressed image into RAM by u-boot (i.e. bursting) and start the kernel in RAM then? The decompressing and copying would be faster then...
How do I disable serial support in u-boot? My u-boot is currently 60k big, in my opinion a simple bootloader which does something like memsetup and starting kernel afterwards should not be much bigger than 10k. Or is that wrong? I tried to disable serial support but several functions in common/ (serial_get* for example) are calling functions in cpu/arm920t/imx_serial.c. Do I have to "#ifdef" any occurences of these functions?
REgards, Konsti