> On Fri, 2016-05-27 at 23:12 +0200, Giuseppe Lippolis wrote:
> > Dear All,
> > I'm trying with buildroot to build the linux-4.4.3 for an iomega 150d
> > machine mounting the mpc8347E sys.
[...]
> > Finalizing device tree... flat tree at 0x94d120
> >
> >
> > But at this point the process crash and the system is reset.
> > It should be something near the handover between the first kenel boot
> > stage and the vmlinux start, but I do not have a jtag to proceed the
> > investigation.
[..]
> > Any suggestion?
>
> Check (with serial output) that flow control reaches the very end of the
> bootwrapper before it jumps to Linux. Use the same code that you use in
> head.S (with loop added in both cases). Print the entry address, and some
> bytes loaded from that address to confirm the image is there. Check that the
> BATs are set up correctly, etc.
>
> -Scott
Hi Scott, thanks for your tips.
I proceed my investigation using now Linux-4.10.4 and I found two issue:
1) the U-Boot 1.1.4 make some mistake when decompress the gzip -9. Therefore,
as a workaround, I currently modify the wrapper to use the uncompressed image.
Nevertheless the image is crashing during the boot.
I modified the cpu_setup_6xx.S in this way (in order to print debug char on
the console) :
.equ cnsladdr, 0xe0004500
_GLOBAL(__setup_cpu_603)
mflr r5
BEGIN_MMU_FTR_SECTION
li r10,0
mtspr SPRN_SPRG_603_LRU,r10 /* init SW LRU tracking */
END_MMU_FTR_SECTION_IFSET(MMU_FTR_NEED_DTLB_SW_LRU)
lis r23, cnsladdr@ha
addi r23, r23, cnsladdr@l
li r25, 'i'
stb r25, 0(r23)
BEGIN_FTR_SECTION
bl __init_fpu_registers
lis r23, cnsladdr@ha
addi r23, r23, cnsladdr@l
li r25, 'l'
stb r25, 0(r23)
END_FTR_SECTION_IFCLR(CPU_FTR_FPU_UNAVAILABLE)
bl setup_common_caches
lis r23, cnsladdr@ha
addi r23, r23, cnsladdr@l
li r25, 'm'
stb r25, 0(r23)
mtlr r5
lis r23, cnsladdr@ha
addi r23, r23, cnsladdr@l
li r25, 'm'
stb r25, 0(r23)
trap
blr
and now I get:
Finalizing device tree... flat tree at 0xbdb960
Il
Therefore the code crash during the call in:
bl setup_common_caches
I'm using the iomega_150d based on the MPC8347.
Do you have some tips about the setup_common_caches?
Thanks.
Bye.
