[linuxsh-dev] Re: [linux-sh:01781] Re: SH4 hardware problem

[<bar...@ya...>]

Gareth:

Thanks for the tips. It provides instant boot up
without worrying about external memories.

However, I went a step further. Since I am not good at
using GDB. I wrote a small procedure in sh-ipl+g and a
PC software that talks on serial line. The combination
loads a binary file (sh executable file mapped on to
part of the cache ram) on to the spare area of the
cache ram. Upon completion of downloading the binary,
sh-ipl+g jumps to the starting address of the download
binary and start executing the file as a procedure.

The downloaded binary has to be small enough to fit
into the cache ram (it is basically just entry.S and
main.c). This binary sets up SDRAM (all neccessary
parameters only) and does SDRAM memory read-write test
within the requested block then it outputs the results
back to PC on serial line. 
Well, this may sound complex, but it is just a work
around for me to avoid using GDB.

Thanks for the tip again.

Mark.


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