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Exception on LDREX to 0x80000000~0xdfffffff on Cortex-M4 of i.MX6 SoloX

Question asked by Guohu Xu on Jan 11, 2016
Latest reply on Feb 19, 2016 by Guohu Xu

Hi Freescale Experts,

 

I want to place the data region of the customized OS in DDR RAM under the PS bus access, but LDREX to these locations leads to exception.

If I use LDREX to access the DDR RAM by PC bus, everything works fine. Running the code on DDR RAM by PC bus is OK.

There is also no problem to use LDREX to access the OCRAM by PS bus(0x20900000).

 

My questions are: Do I miss any setting for LDREX access to DDR by PS bus? Or is there any constrain for LDREX access to DDR by PS bus?

 

Thanks,

Best Regards,

Guohu

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