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Date:   Fri, 28 Jun 2019 12:09:04 -0700 (PDT)
From:   Paul Walmsley <paul.walmsley@sifive.com>
To:     Atish Patra <atish.patra@wdc.com>
cc:     linux-kernel@vger.kernel.org, Karsten Merker <merker@debian.org>,
        Kevin Hilman <khilman@baylibre.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Anup Patel <Anup.Patel@wdc.com>,
        Jonathan Corbet <corbet@lwn.net>, linux-doc@vger.kernel.org,
        linux-riscv@lists.infradead.org,
        Nick Kossifidis <mick@ics.forth.gr>,
        Palmer Dabbelt <palmer@sifive.com>,
        "linux-arm-kernel@lists.infradead.org" 
        <linux-arm-kernel@lists.infradead.org>,
        "mark.rutland@arm.com" <mark.rutland@arm.com>,
        "marek.vasut@gmail.com" <marek.vasut@gmail.com>,
        "catalin.marinas@arm.com" <catalin.marinas@arm.com>,
        "will.deacon@arm.com" <will.deacon@arm.com>,
        "trini@konsulko.com" <trini@konsulko.com>
Subject: Re: [PATCH v4] RISC-V: Add an Image header that boot loader can
 parse.
In-Reply-To: <20190606230800.19932-1-atish.patra@wdc.com>
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On Thu, 6 Jun 2019, Atish Patra wrote:

> Currently, the last stage boot loaders such as U-Boot can accept only
> uImage which is an unnecessary additional step in automating boot
> process.
> 
> Add an image header that boot loader understands and boot Linux from
> flat Image directly.

...


> +#if __riscv_xlen == 64
> +	/* Image load offset(2MB) from start of RAM */
> +	.dword 0x200000
> +#else
> +	/* Image load offset(4MB) from start of RAM */
> +	.dword 0x400000
> +#endif

Is there a rationale behind these load offset values?


- Paul