From: marc.zyngier@arm•com (Marc Zyngier)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH V2 4/6] arm64: Add DTS support for FSL's LS2085A SoC
Date: Tue, 02 Sep 2014 11:19:16 +0100 [thread overview]
Message-ID: <540599A4.5080600@arm.com> (raw)
In-Reply-To: <20140902100531.GB25092@arm.com>
On 02/09/14 11:05, Catalin Marinas wrote:
> On Fri, Aug 29, 2014 at 07:07:40PM +0100, bhupesh.sharma at freescale.com wrote:
>>>>>> + memory at 80000000 {
>>>>>> + device_type = "memory";
>>>>>> + reg = <0x00000000 0x80000000 0 0x80000000>;
>>>>>> + /* DRAM space 1 - 2 GB DRAM */
>>>>>> + };
>>>>>
>>>>> Does that mean:
>>>>>
>>>>> - This is "DRAM space 1", populated with 2GB?
>>>>>
>>>>> Or:
>>>>>
>>>>> - The DRAM space can be populated with 1 to 2 GB?
>>>>>
>>>>> If the former, s/ - /: / for clarity.
>>>>>
>>>>> If the latter, it might make sense to move that into board-specific
>>>>> dts files. If this can be dynamically populated ideally the
>>>>> firmware/loader would fix this up (assuming it can probe the memory).
>>>>
>>>> If the former. I will fix it up in v3.
>>>
>>> Ok. Out of curiosity, are there other DRAM spaces that might be
>>> populated?
>>
>> Yes there is another DRAM space. The 1st one is accessible within 32 bits and
>> the 2nd one is accessible from 40-bit and above. However, I was waiting
>> for the 4-level ARM64 page table patches (from Catalin) to get absorbed, as w/o the
>> same we can access only a 39-bit PA and hence can have only 3-level page table limited
>> to the 1st DRAM region (which is accessible via first 32 bits).
>>
>> Any idea, about the latest state of Catalin's patch ([1])? Has it made to linux-next?
>
> The 48-bit VA support is in mainline but you wouldn't be able to enable
> it because KVM is still broken. Hopefully it will make it to 3.18-rc1.
Yeah, if Joel doesn't finish it by the end of the week, I'll have a look
at it myself, as it's been dragging for about 4 months now...
Thanks,
M.
--
Jazz is not dead. It just smells funny...
next prev parent reply other threads:[~2014-09-02 10:19 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-28 9:55 [PATCH V2 0/6] ARM64: Add support for FSL's LS2085A SoC Bhupesh Sharma
2014-08-28 9:55 ` [PATCH V2 1/6] Documentation: DT: Add bindings for FSL NS16550A UART Bhupesh Sharma
2014-08-28 9:55 ` [PATCH V2 2/6] Documentation: DT: Add entry for FSL LS2085A SoC and Simulator model Bhupesh Sharma
2014-08-28 9:55 ` [PATCH V2 3/6] Documentation: DT: Add entry for FSL Management Complex Bhupesh Sharma
2014-08-28 9:55 ` [PATCH V2 4/6] arm64: Add DTS support for FSL's LS2085A SoC Bhupesh Sharma
2014-08-28 14:56 ` Mark Rutland
2014-08-29 15:51 ` bhupesh.sharma at freescale.com
2014-08-29 17:47 ` Mark Rutland
2014-08-29 18:07 ` bhupesh.sharma at freescale.com
2014-09-02 10:05 ` Catalin Marinas
2014-09-02 10:14 ` Catalin Marinas
2014-09-02 10:27 ` bhupesh.sharma at freescale.com
2014-09-02 10:19 ` Marc Zyngier [this message]
2014-09-03 17:23 ` Geoff Levand
2014-09-03 17:53 ` Mark Rutland
2014-09-03 18:17 ` Geoff Levand
2014-08-28 9:55 ` [PATCH V2 5/6] arm64: dts/Makefile: Add support for FSL's LS2085A simulator model Bhupesh Sharma
2014-08-28 9:55 ` [PATCH V2 6/6] arm64: Add support for FSL's LS2085A SoC in Kconfig and defconfig Bhupesh Sharma
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