how to enable suspend to ram for arm-64 bits

[yoma sophian]

hi Sudeep:

2016-10-18 18:59 GMT+08:00 Sudeep Holla <sudeep.holla at arm.com>:
>
>
> On 18/10/16 11:45, Mark Rutland wrote:
>>
>> On Tue, Oct 18, 2016 at 12:00:02PM +0200, Pavel Machek wrote:
>>>>>
>>>>> b. in arm64, if some platform has its own suspend flow,  couldn't it
>>>>> adopts arm/match-xxx to register its own global suspend method?
>>>>
>>>>
>>>> No, PSCI is highly recommended.
>>>
>>>
>>> Relying on firmware for suspend on x86 was a great disaster, lets not
>>> repeat
>>> that mistake. arm32 has better powermanagement than x86 ever will (see
>>> Nokia N900
>>> for example) -- feel free to copy that code from arm32.
>>
>>
>> Quite frankly, copying hundreds of lines of board-specific code
>> (including assembly that won't compile) is unlikely to help.
>>
>> So far arm64 requires well-defined, standard, reusable interfaces (e.g.
>> PSCI). That cleanly separates concerns (e.g. anyone can implement the
>> backend without mandatory changes to the kernel), and keeps things
>> maintainable.
>>
>> ARM publishes and maintains the ARM Trusted Firmware [1], which anyone
>> can use and build atop of. It's open source (three-clause BSD with DCO),
>> and accepts board ports. You can have a completely open stack,
>> regardless of whether part of that stack is firmware.
>>
>
> I think you missed to add the link[1]
> [1] https://github.com/ARM-software/arm-trusted-firmware
thanks for your kind information ^^