topic OCRAM memory aliasing in imx6q in i.MX Processors

OCRAM memory aliasing in imx6q

ajmalali — Mon, 14 Nov 2016 11:29:08 GMT

HI,

I read in the manual (IMX6DQRM) that " Memory alias is also supported for on-chip RAM. Address from 0x00940000 to
0x009FFFFF are alias addresses for it, any read/write operation to this area will be mapped back to the 256 Kbytes area.". How is this mapped? I mean, the OCRAM is 0.25MB and the alias memory is 0.75MB. Is there 3 address location, that may be mapped to the OCRAM area?

Regards,

Ajmal

Re: OCRAM memory aliasing in imx6q

RossMcLuckie — Mon, 14 Nov 2016 12:04:05 GMT

Not something I have looked at before, but it should be very easy to test/verify.

From the description I would expect there are four regions all identical -

0x00900000 - 0x0093ffff

0x00940000 - 0x0097ffff

0x00980000 - 0x009bffff

0x009c0000 - 0x009fffff

You should be able to test this quickly with a debugger or uboot (mm, md commands).

Regards

Ross