[PATCH v10 1/3] ARM: uncompress: Add be32tocpu macro
geert at linux-m68k.org
Fri Dec 4 04:43:17 EST 2020
On Thu, Dec 3, 2020 at 1:50 PM Ard Biesheuvel <ardb at kernel.org> wrote:
> On Thu, 3 Dec 2020 at 13:19, Geert Uytterhoeven <geert+renesas at glider.be> wrote:
> > DTB stores all values as 32-bit big-endian integers.
> > Add a macro to convert such values to native CPU endianness, to reduce
> > duplication.
> > Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
> > ---
> > v10:
> > - New.
> > ---
> > arch/arm/boot/compressed/head.S | 26 ++++++++++++--------------
> > 1 file changed, 12 insertions(+), 14 deletions(-)
> > diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S
> > index 835ce64f1674c9a2..aabdc544c03aafdc 100644
> > --- a/arch/arm/boot/compressed/head.S
> > +++ b/arch/arm/boot/compressed/head.S
> > @@ -165,6 +165,16 @@
> > orr \res, \res, \tmp1, lsl #24
> > .endm
> > + .macro be32tocpu, val, tmp
> > +#ifndef __ARMEB__
> > + /* convert to little endian */
> > + eor \tmp, \val, \val, ror #16
> > + bic \tmp, \tmp, #0x00ff0000
> > + mov \val, \val, ror #8
> > + eor \val, \val, \tmp, lsr #8
> > +#endif
> > + .endm
> > +
> Thanks for cleaning this up.
> This patch is fine as is.
> Reviewed-by: Ard Biesheuvel <ardb at kernel.org>
Thanks, submitted to rmk's patch tracker.
> However, I would like to note that, since we are touching this code,
> we might do it properly. (Given the v10, feel free to ignore or defer
> to a later time)
Thanks for the suggestion, adding to my list.
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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