linux-riscv.lists.infradead.org archive mirror
 help / color / mirror / Atom feed
From: Anup Patel <anup@brainfault.org>
To: Christoph Hellwig <hch@infradead.org>
Cc: Palmer Dabbelt <palmer@sifive.com>,
	Anup Patel <anup.patel@wdc.com>,
	"linux-kernel@vger.kernel.org List"
	<linux-kernel@vger.kernel.org>, Atish Patra <atish.patra@wdc.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	linux-riscv@lists.infradead.org
Subject: Re: [PATCH 5/5] RISC-V: Implement compile-time fixed mappings
Date: Sat, 19 Jan 2019 16:14:48 +0530	[thread overview]
Message-ID: <CAAhSdy3skp+8qJcVhen7GN4EuF0aQoAyQtxoV2ZOv54vW9Fsew@mail.gmail.com> (raw)
In-Reply-To: <20190115134746.GF13216@infradead.org>

On Tue, Jan 15, 2019 at 7:17 PM Christoph Hellwig <hch@infradead.org> wrote:
>
> On Mon, Jan 07, 2019 at 09:40:47PM +0530, Anup Patel wrote:
> > From: Anup Patel <anup.patel@wdc.com>
> >
> > This patch implements compile-time virtual to physical
> > mappings. These compile-time fixed mappings can be used
> > by earlycon, ACPI, and early ioremap for creating fixed
> > mappings when FIX_EARLYCON_MEM=y.
> >
> > To start with, we have enabled compile-time fixed
> > mappings for earlycon.
> >
> > Signed-off-by: Anup Patel <anup.patel@wdc.com>
> > ---
> >  arch/riscv/Kconfig              |  3 ++
> >  arch/riscv/include/asm/fixmap.h | 52 +++++++++++++++++++++++++++++++++
> >  arch/riscv/mm/init.c            | 32 ++++++++++++++++++++
> >  3 files changed, 87 insertions(+)
> >  create mode 100644 arch/riscv/include/asm/fixmap.h
> >
> > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> > index e0d7d61779a6..66094aba9a59 100644
> > --- a/arch/riscv/Kconfig
> > +++ b/arch/riscv/Kconfig
> > @@ -86,6 +86,9 @@ config GENERIC_CSUM
> >  config GENERIC_HWEIGHT
> >       def_bool y
> >
> > +config FIX_EARLYCON_MEM
> > +     def_bool y
> > +
>
> Can you please throw in a prep patch to move FIX_EARLYCON_MEM to
> drivers/tty/serial/Kconfig and only select it from the architectures
> that use it?
>
> > + * fixmap.h: compile-time virtual memory allocation
>
> No need to mention the header name.
>
> > + */
> > +
> > +#ifndef _ASM_RISCV_FIXMAP_H
> > +#define _ASM_RISCV_FIXMAP_H
> > +
> > +#ifndef __ASSEMBLY__
>
> As far as I can tell we never include this header from assembly files,
> so this ifdef should not be needed.

Okay, will drop #ifndef

>
> > +/*
> > + * Here we define all the compile-time 'special' virtual
> > + * addresses. The point is to have a constant address at
> > + * compile time, but to set the physical address only
> > + * in the boot process.
> > + *
> > + * These 'compile-time allocated' memory buffers are
> > + * page-sized. Use set_fixmap(idx,phys) to associate
> > + * physical memory with fixmap indices.
> > + */
>
> Please use up the available 80 chars per line for comments.

Sure, will do.

Regards,
Anup

_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

  reply	other threads:[~2019-01-19 10:45 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-07 16:10 [PATCH 0/5] Fixmap support and MM cleanups Anup Patel
2019-01-07 16:10 ` [PATCH 1/5] RISC-V: Move free_initrd_mem() to kernel/setup.c Anup Patel
2019-01-15 13:43   ` Christoph Hellwig
2019-01-19 10:34     ` Anup Patel
2019-01-07 16:10 ` [PATCH 2/5] RISC-V: Setup init_mm before parse_early_param() Anup Patel
2019-01-15 13:44   ` Christoph Hellwig
2019-01-19 10:42     ` Anup Patel
2019-01-07 16:10 ` [PATCH 3/5] RISC-V: Move setup_bootmem() to mm/init.c Anup Patel
2019-01-15 13:44   ` Christoph Hellwig
2019-01-19 10:43     ` Anup Patel
2019-01-07 16:10 ` [PATCH 4/5] RISC-V: Move setup_vm() " Anup Patel
2019-01-15 13:45   ` Christoph Hellwig
2019-01-07 16:10 ` [PATCH 5/5] RISC-V: Implement compile-time fixed mappings Anup Patel
2019-01-15 13:47   ` Christoph Hellwig
2019-01-19 10:44     ` Anup Patel [this message]
2019-01-19 11:44     ` Anup Patel

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=CAAhSdy3skp+8qJcVhen7GN4EuF0aQoAyQtxoV2ZOv54vW9Fsew@mail.gmail.com \
    --to=anup@brainfault.org \
    --cc=anup.patel@wdc.com \
    --cc=aou@eecs.berkeley.edu \
    --cc=atish.patra@wdc.com \
    --cc=hch@infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-riscv@lists.infradead.org \
    --cc=palmer@sifive.com \
    --cc=paul.walmsley@sifive.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).