From: Mark Rutland <mark.rutland@arm.com>
To: Noam Camus <noamikong@gmail.com>
Cc: linux-arm-kernel@lists.infradead.org
Subject: Re: Changing default kernel load address
Date: Tue, 27 Aug 2019 12:02:35 +0100 [thread overview]
Message-ID: <20190827110234.GB8000@lakrids.cambridge.arm.com> (raw)
In-Reply-To: <CABhetiwRF2Gq3HeG_QNT6t3GtCNJzedeenn6vQC_0FYr5Ee+mA@mail.gmail.com>
On Mon, Aug 26, 2019 at 08:12:27PM +0300, Noam Camus wrote:
> Hi,
>
> I wish to change an arm64 machine kernel load address and I hope this
> forum can assist.
>
> In my current setup the KERNEL_START macro (_text) equals 128.5MB:
> KIMAGE_VADDR=128MB
> TEXT_OFFSET=512KB
>
> I wish to change kernel load address to reside on my internal RAM
> which locates beyond 4GB.
You shouldn't need to modify anything; the kernel can be loaded at any
2MiB-aligned physical address + TEXT_OFFSET. KERNEL_START and
KIMAGE_VADDR are virtual addresses and don't require a specific physical
address.
Please see:
https://www.kernel.org/doc/html/latest/arm64/booting.html
> Can someone tell what changes I need to do so kernel load address will
> be above 4GB.
>
> Note: I use FIT image to provide U-Boot the kernel Load address.
I don't know how FIT works, but the U-Boot "booti" command should do the
right thing if given an arm64 kernel Image.
Thanks,
Mark.
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next prev parent reply other threads:[~2019-08-27 11:03 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-26 17:12 Changing default kernel load address Noam Camus
2019-08-27 11:02 ` Mark Rutland [this message]
2019-08-30 11:09 ` Noam Camus
2019-08-30 11:19 ` Mark Rutland
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