Warning when exception address is changed?

Hi grante,

> What "regions of unusable memory" are created by setting the exception address to

> the start of SDRAM?

Take a look at the default linker command script -- the warning is just a conservative warning

and from a practical point of view is really just a software issue -- provided your reset address

is elsewhere. If the warning bothers you just do as makasete suggests and set it to

whatever + 0000_0020.

The first 0x20 bytes are just the first cache line following the reset address -- and the only

line that gets invalidated at reset -- so that's where the linker scripts want to put the

startup code that invalidates the rest of the instruction cache. Placing the exception

address at +0x20 will help avoid any software link-time issues when you're playing

around with different code models.

Regards,

--Scott