On Thu, Jan 5, 2017 at 12:06 PM, Ajith Kumar Kumsi < ajithkumar.kumsi@inedasystems.com> wrote:
Hi,
I tried to read DFAR and DFSR registers by adding the below code inside _spinlock_loop as shown below:
_spinlock_loop: MRC p15, 0, r10, c6, c0, 0 MRC p15, 0, r9, c5, c0, 0 ldrex r1, [r0]
In r10 the value is FFFFFFFC
In r9 the value is 8
Any suggestions in this regard.
So DFSR says "Synchronous external abort" and the address is 0xfffffffc. I'm afraid I don't have much to add to that.
Regards, Jens
Regards,
Ajith
*From:* Jens Wiklander jens.wiklander@linaro.org *Sent:* Thursday, January 5, 2017 3:54:51 PM
*To:* Ajith Kumar Kumsi *Cc:* tee-dev@lists.linaro.org *Subject:* Re: [Tee-dev] OpTee porting on ARMv7
On Thu, Jan 5, 2017 at 10:43 AM, Ajith Kumar Kumsi <ajithkumar.kumsi@ inedasystems.com> wrote:
Hi,
Thanks for the quick response.
R0 holds an valid address which belongs to TEE_RAM.
Inside that address the value is 0.
So what's causing the abort then? DFAR and DFSR will give you some clues. Is the address in r0 4 byte aligned?
Regards, Jens
Regards,
Ajith
*From:* Jens Wiklander jens.wiklander@linaro.org *Sent:* Thursday, January 5, 2017 2:55:32 PM
*To:* Ajith Kumar Kumsi *Cc:* tee-dev@lists.linaro.org *Subject:* Re: [Tee-dev] OpTee porting on ARMv7
Hi,
On Thu, Jan 5, 2017 at 10:11 AM, Ajith Kumar Kumsi ajithkumar.kumsi@inedasystems.com wrote:
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.
That piece of code is used by other platforms so I guess the problem is with the input. What's in r0 would give some clue, because it's supposed to point ot spinlock within __malloc_mu
Regards, Jens
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
http://www.slideshare.net/linaroorg/lcu14-302-how-to-port-optee-to-another-platform LCU14 302- How to port OP-TEE to another platform http://www.slideshare.net/linaroorg/lcu14-302-how-to-port-optee-to-another-platform www.slideshare.net LCU14 302- How to port OP-TEE to another platform ----- Speaker: Joakim Bech, Jens Wiklander and Pascal Brand
and https://github.com/OP-TEE/optee_os#3-platforms-supported
https://github.com/OP-TEE/optee_os#3-platforms-supported GitHub - OP-TEE/optee_os: Trusted side of the TEE https://github.com/OP-TEE/optee_os#3-platforms-supported github.com The optee_os git, contains the source code for the TEE in Linux using the ARM® TrustZone® technology. This component meets the GlobalPlatform TEE System ...
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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