[U-Boot] [PATCH] arm64 patch: gicv3 support
Albert ARIBAUD
albert.u.boot at aribaud.net
Fri Feb 21 17:38:05 CET 2014
Hi fenghua at phytium.com.cn,
On Wed, 15 Jan 2014 16:10:56 +0800, fenghua at phytium.com.cn wrote:
> From: David Feng <fenghua at phytium.com.cn>
>
> This patch add gicv3 support to uboot armv8 platform.
> Modifications cover 4 source files, as follows:
> gic.S: gicv3 initialization and sgi interrupt raising.
> goc.h: gicv3 register definitions.
> vexpress_aemv8a.h: add CONFIG_GICV2/CONFIG_GICV3 switch.
> start.S: set SCR_EL3.NS bit to 1, gicv3 register of ICC_SRE_EL2
> could be accessed only when SCR_EL3.NS=1.
> set SCR_EL3.IRQ|FIQ|EA bits, reroute all interrupts to
> el3 at all cores, slaves could be waken up by interrupt
> only when the interrupt is routed to it when running
> at el3.
> Note: please use the latest gcc 4.8 compiler from linaro
> which support gicv3 system register assembling.
>
> Signed-off-by: David Feng <fenghua at phytium.com.cn>
> ---
I am not well-versed enough in aarch64 and GIC, be it v2 or v3, so...
Is this patch OK as it is, or should a V2 follow with common GIVv2/GICv3
code merged?
Amicalement,
--
Albert.
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