From: Rob Herring <robherring2@gmail.com>
To: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>,
linux-mips@linux-mips.org,
Catalin Marinas <catalin.marinas@arm.com>,
Aurelien Jacquiot <a-jacquiot@ti.com>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Will Deacon <will.deacon@arm.com>,
Max Filippov <jcmvbkbc@gmail.com>,
Paul Mackerras <paulus@samba.org>,
Jonas Bonn <jonas@southpole.se>,
Russell King <linux@arm.linux.org.uk>,
linux-c6x-dev@linux-c6x.org, x86@kernel.org, arm@kernel.org,
Mark Salter <msalter@redhat.com>,
Grant Likely <grant.likely@linaro.org>,
linux-xtensa@linux-xtensa.org,
James Hogan <james.hogan@imgtec.com>,
devicetree-discuss@lists.ozlabs.org,
Rob Herring <rob.herring@calxeda.com>,
linux-arm-kernel@lists.infradead.org,
Chris Zankel <chris@zankel.net>, Michal Simek <monstr@monstr.eu>,
Vineet Gupta <vgupta@synopsys.com>,
linux-kernel@vger.kernel.org, Ralf Baechle <ralf@linux-mips.org>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH] of: Specify initrd location using 64-bit
Date: Thu, 27 Jun 2013 15:54:20 -0500 [thread overview]
Message-ID: <51CCA67C.2010803@gmail.com> (raw)
In-Reply-To: <51C48B5A.2040404@ti.com>
On 06/21/2013 12:20 PM, Santosh Shilimkar wrote:
> On Friday 21 June 2013 05:04 AM, Sebastian Andrzej Siewior wrote:
>> On 06/21/2013 02:52 AM, Santosh Shilimkar wrote:
>>> diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c
>>> index 0a2c68f..62e2e8f 100644
>>> --- a/arch/microblaze/kernel/prom.c
>>> +++ b/arch/microblaze/kernel/prom.c
>>> @@ -136,8 +136,7 @@ void __init early_init_devtree(void *params)
>>> }
>>>
>>> #ifdef CONFIG_BLK_DEV_INITRD
>>> -void __init early_init_dt_setup_initrd_arch(unsigned long start,
>>> - unsigned long end)
>>> +void __init early_init_dt_setup_initrd_arch(u64 start, u64 end)
>>> {
>>> initrd_start = (unsigned long)__va(start);
>>> initrd_end = (unsigned long)__va(end);
>>
>> I think it would better to go here for phys_addr_t instead of u64. This
>> would force you in of_flat_dt_match() to check if the value passed from
>> DT specifies a memory address outside of 32bit address space and the
>> kernel can't deal with this because its phys_addr_t is 32bit only due
>> to a Kconfig switch.
>>
>> For x86, the initrd has to remain in the 32bit address space so passing
>> the initrd in the upper range would violate the ABI. Not sure if this
>> is true for other archs as well (ARM obviously not).
>>
> That pretty much means phys_addr_t. It will work for me as well but
> in last thread from consistency with memory and reserved node, Rob
> insisted to keep it as u64. So before I re-spin another version,
> would like to here what Rob has to say considering the x86 requirement.
>
> Rob,
> Are you ok with phys_addr_t since your concern was about rest
> of the memory specific bits of the device-tree code use u64 ?
No. I still think it should be u64 for same reasons I said originally.
Rob
next prev parent reply other threads:[~2013-06-27 20:54 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-21 0:52 [PATCH] of: Specify initrd location using 64-bit Santosh Shilimkar
2013-06-21 4:39 ` Vineet Gupta
2013-06-21 8:23 ` James Hogan
2013-06-21 17:12 ` Santosh Shilimkar
2013-06-21 9:04 ` Sebastian Andrzej Siewior
2013-06-21 17:20 ` Santosh Shilimkar
2013-06-27 20:54 ` Rob Herring [this message]
2013-06-28 7:54 ` Sebastian Andrzej Siewior
2013-06-28 9:59 ` Grant Likely
2013-06-28 13:49 ` Jean-Christophe PLAGNIOL-VILLARD
2013-06-28 23:43 ` Santosh Shilimkar
2013-06-29 8:34 ` Geert Uytterhoeven
2013-07-01 7:48 ` Sebastian Andrzej Siewior
2013-07-01 7:59 ` Geert Uytterhoeven
2013-07-01 8:09 ` Sebastian Andrzej Siewior
2013-07-01 13:58 ` Santosh Shilimkar
-- strict thread matches above, loose matches on Subject: below --
2012-09-12 16:05 [PATCH] of: specify " Cyril Chemparathy
2012-09-12 16:16 ` Geert Uytterhoeven
2012-09-12 18:02 ` Cyril Chemparathy
2012-09-12 19:58 ` Sebastian Andrzej Siewior
2012-09-12 22:08 ` Rob Herring
2012-09-13 6:47 ` Sebastian Andrzej Siewior
2012-09-13 21:02 ` Rob Herring
2012-09-12 20:23 ` Rob Herring
2012-09-12 20:31 ` Nicolas Pitre
2012-09-12 20:56 ` Rob Herring
2012-09-12 23:45 ` Cyril Chemparathy
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