On Jul 13, 4:15=A0am, Randy Meyers <rmeyers1...@gmail.com> wrote:
> I am having trouble getting code to run when relocated in flash.
>
> Setup; MPC565, bootloader (mine) located @ 0x0000, compiled with CW 8.1
>
> MSR[IP] =3D 0x0. Everything is good and bootloader runs on PORESET.
>
> User program loaded @ 0x10000. Compiled with MSR[IP] =3D 1, BBCMCR[ETRE] =
=3D
> 1, and BBCMCR[OERC] =3D 0b01. As per AN2472. Linker file adjusted to load
> @ 0x10000. Linker MAP shows everything where it is supposed to go.
> .reset @ 0x10008.
>
> Bootloader issues 'ba 0x10008'. User program starts running and
> everything is fine until the OS (ucosII) issues the first 'sc' command.
> Program halts, I believe because it can't find the
> 'system_call_exception' .I should say that the user program works
> perfectly when compiled for and loaded at 0x0000.
>
> I have set (or reset) MSR[IP], and the BBCMCR register values after the
> jump and it does not help.
>
> My question specifically; what controls where the system looks for the
> exception table at? What causes the processor to say 'Oh, an 'sc' call
> I'll go to _____ memory location to look for the 'system_call_exception'.
>
> Or, on the other hand, maybe I'm just going about trying to get my code
> started the wrong way.
>
> Any help would be greatly appreciated.

The sc exception is at $c00, if this is what you are asking.
If you do not have it, you probably would like to get MPCFPE32B.pdf .

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I am having trouble getting code to run when relocated in flash.

Setup; MPC565, bootloader (mine) located @ 0x0000, compiled with CW 8.1

MSR[IP] = 0x0. Everything is good and bootloader runs on PORESET.

User program loaded @ 0x10000. Compiled with MSR[IP] = 1, BBCMCR[ETRE] = 
1, and BBCMCR[OERC] = 0b01. As per AN2472. Linker file adjusted to load 
@ 0x10000. Linker MAP shows everything where it is supposed to go. 
.reset @ 0x10008.

Bootloader issues 'ba 0x10008'. User program starts running and 
everything is fine until the OS (ucosII) issues the first 'sc' command. 
Program halts, I believe because it can't find the 
'system_call_exception' .I should say that the user program works 
perfectly when compiled for and loaded at 0x0000.

I have set (or reset) MSR[IP], and the BBCMCR register values after the 
jump and it does not help.

My question specifically; what controls where the system looks for the 
exception table at? What causes the processor to say 'Oh, an 'sc' call 
I'll go to _____ memory location to look for the 'system_call_exception'.

Or, on the other hand, maybe I'm just going about trying to get my code 
started the wrong way.

Any help would be greatly appreciated.