[PATCH 3/3] arm64: dts: Add dts files for Hisilicon Hi6220 SoC

Marc Zyngier
2015-02-06T09:07:10Z

On 06/02/15 08:42, Brent Wang wrote:

[...]

>>
>>> + <0x0 0xf6802000 0x0 0x2000>, /* GICC */
>>> + <0x0 0xf6804000 0x0 0x2000>, /* GICH */
>>> + <0x0 0xf6806000 0x0 0x2000>; /* GICV */
>>
>> I guess no-one's bothered to consider 64k pages?
>>
>> Given GICH and GICV, I hope that this platform is booted at EL2?
> Transfer from EL3 to EL1 directly, keep these two just for future use.

That's a real shame, as it keeps users away from some key aspects of the
ARMv8 architecture.

>>
>>> + #interrupt-cells = <3>;
>>> + #address-cells = <0>;
>>> + interrupt-controller;

And if you're keeping GICH/GICV, where is the maintenance interrupt?

>>> + };
>>> +
>>> +
>>> + timer {
>>> + compatible = "arm,armv8-timer";
>>> + interrupt-parent = <&gic>;
>>> + interrupts = <1 13 0xff08>,
>>> + <1 14 0xff08>,
>>> + <1 11 0xff08>,
>>> + <1 10 0xff08>;
>>> + clock-frequency = <1200000>;
>>> + };
>>
>> NAK. Fix your firmware to configure CNTFRQ, on all CPUs.
> Fix in next version, maybe it will take some time to change firmware.

While you're at it, make sure CNTVOFF_EL2 is set to zero on all CPUs
before dropping to EL1. This tends to be overlooked.

Thanks,

M.
--
Jazz is not dead. It just smells funny...