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Re: [PATCH] Add MIPS64R2 core support.

To: Sergei Shtylyov <sshtylyov@mvista.com>
Subject: Re: [PATCH] Add MIPS64R2 core support.
From: Leonid Yegoshin <yegoshin@mips.com>
Date: Tue, 10 Apr 2012 12:09:42 -0700
Cc: "Steven J. Hill" <sjhill@mips.com>, <linux-mips@linux-mips.org>, <ralf@linux-mips.org>
In-reply-to: <4F841E48.7000104@mvista.com>
References: <1333987461-822-1-git-send-email-sjhill@mips.com> <4F841E48.7000104@mvista.com>
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On 04/10/2012 04:49 AM, Sergei Shtylyov wrote:
From: "Steven J. Hill"<sjhill@mips.com>


+config 64BIT_PHYS_ADDR
+    bool "Kernel supports 64 bit physical addresses" if EXPERIMENTAL
+    depends on 64BIT

This option is selected on 32-bit CPUs like Alchemy, which has 36-bit physical address. It will cause a warning about unmet

Just verified - selected Alchemy and DB1000 board and got

# CONFIG_64BIT is not set
CONFIG_64BIT_PHYS_ADDR=y
CONFIG_ARCH_PHYS_ADDR_T_64BIT=y
CONFIG_PHYS_ADDR_T_64BIT=y

???

I also want to say that NetLogic Microsystems web site indicates that some of Alchemy CPU has only 14 bit DDR/SDRAM address, for exam - Au1550 (http://www.netlogicmicro.com/Products/Alchemy/Au1550.asp) but arch/mips/configs/db1550_defconfig (and pb1550) choses 64BIT_PHYS_ADDR too. Seems like something wrong here.

- Leonid.

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