[raspi-internals] Re: caches?
- From: Volker Barthelmann <vb@xxxxxxxxxxxx>
- To: raspi-internals@xxxxxxxxxxxxx
- Date: Fri, 24 May 2013 07:57:53 +0200
On 23.05.2013 06:44, Herman Hermitage wrote:
Eizo-san has reported problems in the past. I cant remember entirely
how he resolved them. I recall he found if he used base+512 and not the
first 512 bytes of allocated memory for instructions he was ok.
To test this, I added an option to my loader that will leave the first
1024 bytes unused. Unfortunately, this did not help. Actually I can run
a program several times as long as I do not change the offset setting.
Once I change it, I get problems.
I
havent had any issues, but I'm quitting out and re-running a ARM linux
process each time I try a different test.
I am also quitting the load on the ARM side each time. I have to reboot
to get it working.
If you can reduce the problem to the smallest repeatable sequence, I can
have a shot at debugging it.
Unfortunately, it does not happen with very small code. Perhaps a
certain size is needed. E.g. when I use a printf with format specifiers,
it will pull in a lot of code from the C library and cause problems with
a very small main()-function only.
Otherwise, I need quite more code to get the problem.
I have uploaded a preview of my toolchain (see other mail). Maybe you
find something that I am doing completely wrong.
Volker
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