[U-Boot-Users] Wind River SBC8560 saga continues

Andy Fleming
2007-05-04T21:27:30Z

On 5/4/07, Mark Pilant <Mark.Pilant@mintera.com> wrote:
> while (cp->cpcr & CPM_CR_FLG) /* wait if cp is busy */
>
> It is this second "while" that is "hanging". The generated code for
> the while is:
>
> lis R9,0xff79
> x: lwz R0,0x19c0(R9)
> andis. R11,r0,0x1
> bne x
>
> R9 correctly contains the CPM base, and the offset 0x19c0 is correct
> for the CPCR. So it would appear the code should be picking up the
> contents of location 0xff7919c0. Here is where the fun begins. The
> value retrieved by the code (into R0) is 0x00810000 but the value
> retrieved by the visionCLICK dm command is 00800000. (This is also
> the value displayed by the CPCR field of the "COMM" register list.

Very strange. Have you double-checked the LAWs to make sure the CCSR
space is properly configured? And checked CCSRBAR to make sure that
it's still *at* 0xff700000?

Also, is it possible the difference is due to a time delay between the
CPU reading the memory and visionCLICK reading it?

Andy