[U-Boot] tlb15_entry is set wrong in the 4K code when the MPC8572DS boots from nand flash

[Y fan]

Thank you for your reply.

u-boot 2014.01-rc3

The board MPC8572DS could work well with the u-boot code.However, when I
want to boot from the nand flash. There's something wrong.

 I have modified the CS0 to nand flash. when I make the uboot code, I use
the command " make distclean; make MPC8572DS_NAND".


* the create_init_ram_area in start.S:*

It should create a tlb1_entry 15 in AS1, but instead it creates a
tlb1_entry 15 for AS0 and have a wrong size(if the fifth bit of the
tlb1_entry 15 value is for the AS.) According to the code, the size of this
entry should be 1Mbyte. However the real one is 256Mbyte.



in the start_e500 in start.S:

there should be a tlb1_entry 2 (for e500 debugging) for AS0 , again when I
tracing the execution of the code, I didn't find the tlb entry is
constructed.


cheers,

Y.Fan


2014-02-12 23:11 GMT+01:00 Scott Wood <scottwood at freescale.com>:

> On Thu, 2014-01-30 at 15:57 +0100, Y fan wrote:
> > Hello,
> >
> > The memory of the MPC8572DS can't be read correctly after the setup of
> the
> > tlb1_entry in the 4K boot code.
>
> What specific memory location can't be read?  What part of the code is
> failing?
>
> What version of U-Boot are you running?
>
> > And also in the create_init_ram code, the tlb1_entry15&14 are set to be
> in
> > the address space 0 which are supposed to be used in the address space 1.
> > There seems somthing wrong with the writing of the TLB entry. But I don't
> > know why. Do anyone know the reason?
>
> If you mean create_init_ram_area in start.S, it is creating the entries
> in AS1.  What do you see than indicates the contrary?
>
> -Scott
>
>
>