Re: [Xen-devel] Failed to launch xen on J6 evm

["Korupol, Naveen (EXT)" <Naveen.Korupol@xxxxxxxxxxxxxxxxxxxx>]

Hi Ian

I am (awesome) glad to see your response.


[IC] J6 EVM?
[NK] is a TI (& Spectrum Digital) evaluation board built on OMAP 5 architecture 
which has 2 ARM Cortex-A15 core(s), 2 Cortex-M4 cores and SGX544 3D graphics 
core(s).

[IC] enable early_printk
[NK] now I have enabled early_printk, I see that processor is not in hyp mode 
as you correctly envisioned.

Starting kernel ...

- UART enabled -
- CPU 00000000 booting -
- Xen must be entered in NS Hyp mode -
- Boot failed -

I took my current U-Boot from:
>>>> Xen needs to be started in non-secure HYP mode. Use this U-Boot Git 
>>>> repository:
>>>> git clone git://github.com/jwrdegoede/u-boot-sunxi.git
And compiled it for dra7xx_evm_config.

Is there any specific U-Boot for ARM with this HYP mode already enabled 
correctly?
If not, I would appreciate any links to help me update my current u-boot to 
have this setting enabled.

Thanks
Naveen Korupol


-----Original Message-----
From: Ian Campbell [mailto:ian.campbell@xxxxxxxxxx]
Sent: Monday, March 09, 2015 5:55 AM
To: Korupol, Naveen (EXT)
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] Failed to launch xen on J6 evm

On Fri, 2015-03-06 at 20:03 +0000, Korupol, Naveen (EXT) wrote:
> I am using J6 evm.

What is one of them?

> played with couple different u-boots

Does your u-boot launch the kernel (AKA Xen in this case) in NS.HYP mode?

> If there are any probable fixes/hints for bringing up XEN on J6 evm.

Given where things are apparently hanging I think the first step would be to 
enable early printk for your platform.

See docs/misc/arm/early-printk.txt and the long ifeq chain in 
xen/arch/arm/Rules.mk.

If the UART on your platform is one of the existing ones in 
xen/arch/arm/arm*/debug*.inc then this is pretty easy.

If not then you just need to provide two ASM macros early_uart_ready and 
early_uart_transmit which is pretty trivial for every UART I've ever seen -- 
see the existing debug*.inc for examples.

Ian.



Please note my new email address Naveen.Korupol@xxxxxxxxxxxxxxxxxxxxx The old 
address will be available until September 15, 2015.
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