[U-Boot] [PATCH v4 06/10] ARM: HYP/non-sec: allow relocation to secure RAM

[Albert ARIBAUD]

Hi Marc,

On Sat, 26 Apr 2014 13:17:07 +0100, Marc Zyngier <marc.zyngier at arm.com>
wrote:

> The current non-sec switching code suffers from one major issue:
> it cannot run in secure RAM, as a large part of u-boot still needs
> to be run while we're switched to non-secure.
> 
> This patch reworks the whole HYP/non-secure strategy by:
> - making sure the secure code is the *last* thing u-boot executes
>   before entering the payload
> - performing an exception return from secure mode directly into
>   the payload
> - allowing the code to be dynamically relocated to secure RAM
>   before switching to non-secure.
> 
> This involves quite a bit of horrible code, specially as u-boot
> relocation is quite primitive.
> 
> Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>
> ---

This one causes a minor warning to appear when building aarch64 board
vexpress_aemv8a:

/home/albert.u.boot/src/u-boot-arm/arch/arm/lib/bootm.c:189:13: warning: 'do_nonsec_virt_switch' defined but not used [-Wunused-function] 
 static void do_nonsec_virt_switch(void) 
             ^ 

Can you look into removing this warning? Thanks in advance.

Amicalement,
-- 
Albert.