From: Atish Patra <Atish.Patra@wdc.com>
To: "paul.walmsley@sifive.com" <paul.walmsley@sifive.com>
Cc: "corbet@lwn.net" <corbet@lwn.net>,
"mick@ics.forth.gr" <mick@ics.forth.gr>,
"palmer@sifive.com" <palmer@sifive.com>,
"trini@konsulko.com" <trini@konsulko.com>,
"aou@eecs.berkeley.edu" <aou@eecs.berkeley.edu>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"will.deacon@arm.com" <will.deacon@arm.com>,
"catalin.marinas@arm.com" <catalin.marinas@arm.com>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
Anup Patel <Anup.Patel@wdc.com>,
"mark.rutland@arm.com" <mark.rutland@arm.com>,
"marek.vasut@gmail.com" <marek.vasut@gmail.com>,
"merker@debian.org" <merker@debian.org>,
"khilman@baylibre.com" <khilman@baylibre.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-riscv@lists.infradead.org"
<linux-riscv@lists.infradead.org>
Subject: Re: [PATCH v4] RISC-V: Add an Image header that boot loader can parse.
Date: Fri, 28 Jun 2019 19:44:43 +0000 [thread overview]
Message-ID: <c0bdc25bc3aee9eee8bf9ebe561900b88df0540b.camel@wdc.com> (raw)
In-Reply-To: <alpine.DEB.2.21.9999.1906281207290.3867@viisi.sifive.com>
On Fri, 2019-06-28 at 12:09 -0700, Paul Walmsley wrote:
> 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?
>
2MB/4MB alignment requirement is mandatory for current RISC-V kernel.
Anup had a patch that tried to remove that but not accepted yet.
https://patchwork.kernel.org/patch/10868465/
>
> - Paul
>
> _______________________________________________
> linux-riscv mailing list
> linux-riscv@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-riscv
--
Regards,
Atish
next prev parent reply other threads:[~2019-06-28 19:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-06 23:08 [PATCH v4] RISC-V: Add an Image header that boot loader can parse Atish Patra
2019-06-28 19:09 ` Paul Walmsley
2019-06-28 19:44 ` Atish Patra [this message]
2019-07-11 19:42 ` Paul Walmsley
2019-07-11 21:42 ` Atish Patra
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