Hi,
I have gone through the following link http://www.slideshare.net/linaroorg/lcu14-302-how-to-port-optee-to-another-p...
I have followed each step from slide 9 in the document provided in the above link.
Slide 14 of the document discusses regarding the memory configuration "core_bootconfig.c"
I have configured TZDRAM_BASE, TZDRAM_SIZE, CFG_TEE_CORE_NB_CORE, etc in platform_config.h file.
Do I need to create a core_bootconfig.c file separately? I am using platform device which has an armv7 (cortex A5 processor).
Can I use kern.ld.S file or do I need to create another tz-template.lds as given in slide 10 of the document. Please suggest me on this.
As I am new to op-tee porting please guide me on how to port Op-tee O/s on cortex A5.
Regards, Ajith
________________________________ From: Jens Wiklander jens.wiklander@linaro.org Sent: Thursday, January 5, 2017 5:05 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 12:06 PM, Ajith Kumar Kumsi <ajithkumar.kumsi@inedasystems.commailto: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.orgmailto:jens.wiklander@linaro.org> Sent: Thursday, January 5, 2017 3:54:51 PM
To: Ajith Kumar Kumsi Cc: tee-dev@lists.linaro.orgmailto: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.commailto: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.orgmailto:jens.wiklander@linaro.org> Sent: Thursday, January 5, 2017 2:55:32 PM
To: Ajith Kumar Kumsi Cc: tee-dev@lists.linaro.orgmailto: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.commailto: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.orgmailto:jens.wiklander@linaro.org> Sent: Tuesday, November 29, 2016 6:25:53 PM To: Ajith Kumar Kumsi Cc: tee-dev@lists.linaro.orgmailto: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.commailto: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-p...
[http://image.slidesharecdn.com/lcu14-302-howtoportop-teetoanotherplatform-14...]http://www.slideshare.net/linaroorg/lcu14-302-how-to-port-optee-to-another-platform
LCU14 302- How to port OP-TEE to another platformhttp://www.slideshare.net/linaroorg/lcu14-302-how-to-port-optee-to-another-platform www.slideshare.nethttp://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://avatars2.githubusercontent.com/u/7488961?v=3&s=400]https://github.com/OP-TEE/optee_os#3-platforms-supported
GitHub - OP-TEE/optee_os: Trusted side of the TEEhttps://github.com/OP-TEE/optee_os#3-platforms-supported github.comhttp://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.mkhttp://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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