Hi,

While porting Op-tee.elf on ARM A5 board, it is giving a data abort.

I further tried to debug the code, and I could see that in generic_boot.c inside "init_runtime" function when malloc_add_pool(__heap1_start, __heap1_end - __heap1_start) is called, __mutex_lock is getting called and when cpu_spin_lock(&m->spin_lock) is called
at the below point it gives a data abort exception after "cmp r1, #SPINLOCK_UNLOCK".

_spinlock_loop:
    ldrex r1, [r0]
    cmp r1, #SPINLOCK_UNLOCK
    wfene

Can you let me know if I need to make any modifications to make it work.

Regards,
Ajith

From: Jens Wiklander <jens.wiklander@linaro.org>
Sent: Tuesday, November 29, 2016 6:25:53 PM
To: Ajith Kumar Kumsi
Cc: tee-dev@lists.linaro.org
Subject: Re: [Tee-dev] OpTee porting on ARMv7
 


On Tue, Nov 29, 2016 at 1:31 PM, Ajith Kumar Kumsi <ajithkumar.kumsi@inedasystems.com> wrote:


Hi,

Thank you for the reply.

As suggested, I have gone through the http://www.slideshare.net/linaroorg/lcu14-302-how-to-port-optee-to-another-platform and https://github.com/OP-TEE/optee_os#3-platforms-supported

I have downloaded optee_os.

I have gone through the other platforms given under "optee_os/core/arch/arm" and created a new platform and modified changes in platform_config.h, conf.mk, main.c, uart.c, uart.h files accordingly related to the new platform (arm7v-a (cortex a5)).

I tried to export the platform to the new-platform name and tried to build using "make".

I can see that tee.bin got generate in optee_os/out/arm-plat-new/core.

I tried to flash tee.elf in to SRAM and I tried to debug using eclipse, I can see that it is getting halted at optee_os/core/arch/arm/kernel/generic_entry_a32.S at line 58.

 FUNC _start , :

     58         b       .       /* Data abort */

Please suggest me on how to proceed further in this regard.

Since you've obviously got a data abort I'd suggest checking LR and DFAR for more clues to the abort.

Regards,
Jens

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