About A80 board

[fanguannan0706]

Hi,
I want to try OP-TEE on A80 board, and I find there are some kinds of boards, like CC-A80, Pro A80 Kit, A80 pcDuino8 (Beta), A80 OptimusBoard. I want to know which one can support OP-TEE?

[jbech-linaro]

@fanguannan0706 we have tried to get an answer by forwarding your question to Allwinner, but we haven't heard anything from them so far. Is there a special reason why you want to use the Allwinner board? If not, then I'd suggest to try Hikey instead. That is available, open and OP-TEE is running on it also and even though both A80 and Hikey are supported, we use Hikey primarily.

[murasesyuka]

@jbech-linaro there is one Question.

Hikey 32bit build is do not use ArmTrustedFirmware?
now I have a reference plat-sunxi(A80) for armv7 without ATF.

[vchong]

@murasesyuka HiKey is an armv8 64-bit platform and hence uses ARM-TF. I believe there's no 32-bit build.

[jforissier]

Let me try to give more details, hopefully I won't get this wrong.

• OP-TEE on HiKey uses ARM Trusted Firmware.
• EL3 is ARM TF secure monitor, and always runs in Aarch64 execution mode.
• Secure EL1 is OP-TEE OS, and can be either Aarch32 or Aarch64. To build 64-bit binary, use make CFG_ARM64_core=y CROSS_COMPILE=aarch64-linux-gnu-.
• Secure EL0 is for the Trusted Applications and OP-TEE's user-mode libraries (libutils.a, libutee.a, libmpa.a). Only Aarch32 is supported for now.
• Non-secure EL1 (linux kernel and OP-TEE driver) is typically Aarch64 but may be Aarch32, too.
• Non-secure EL0 (user mode applications) may also be either Aarch64 (if the kernel is Aarch64) or Aarch32 (if the kernel is Aarch32 or Aarch64). Note that the current OP-TEE client and driver do not support mixed-mode non-secure side, i.e., no Aarch32 application on top of an Aarch64 kernel. The new generic driver will support such a mode, however.

[murasesyuka]

thank you for reply. and info.

[ghost]

@fanguannan0706 Can we close the issue?

[fanguannan0706]

Ok,of course.