Hi,

I just want to know the purpose of calling ‘invalidate’ (cache_post_dinvalidate) command before writing cached area in file ‘cache_8xx.S’.

The code snippet is appended for reference.

Regards,

Sachin Rane

cache_post_test1:

            mflr       r0

            stw       r0, 4(r1)

            stwu     r3, -4(r1)

            stwu     r4, -4(r1)

            bl          cache_post_dwb

            bl          cache_post_dinvalidate

            /* Write the negative pattern to the test area */

            lwz       r0, 0(r1)

            mtctr     r0

            li           r0, 0xff

            lwz       r3, 4(r1)

            subi      r3, r3, 1

1:

            stbu      r0, 1(r3)

            bdnz     1b