On Wed, Jun 19, 2024 at 02:56:24PM +0200, Heinrich Schuchardt wrote: > On 19.06.24 14:22, Ilias Apalodimas wrote: > > Hi Heinrich, > > > > On Sun, 16 Jun 2024 at 20:31, Heinrich Schuchardt > > <heinrich.schucha...@canonical.com> wrote: > > > > > > In EFI sub-system we rely on invalidate_icache_all() to invalidate the > > > instruction cache after loading binaries. Add the missing implementation > > > on > > > ARM1136, ARM1176. > > > > > > Signed-off-by: Heinrich Schuchardt <heinrich.schucha...@canonical.com> > > > --- > > > arch/arm/cpu/arm11/cpu.c | 12 ++++++++++++ > > > 1 file changed, 12 insertions(+) > > > > > > diff --git a/arch/arm/cpu/arm11/cpu.c b/arch/arm/cpu/arm11/cpu.c > > > index 01d2e1a125d..4bf0446b543 100644 > > > --- a/arch/arm/cpu/arm11/cpu.c > > > +++ b/arch/arm/cpu/arm11/cpu.c > > > @@ -116,3 +116,15 @@ void enable_caches(void) > > > #endif > > > } > > > #endif > > > + > > > +#if !CONFIG_IS_ENABLED(SYS_ICACHE_OFF) > > > +/* Invalidate entire I-cache */ > > > +void invalidate_icache_all(void) > > > +{ > > > + unsigned long i = 0; > > > + > > > + asm ("mcr p15, 0, %0, c7, c5, 0" : : "r" (i)); > > > > This looks correct, but can't we define it as > > __asm__("mcr p15, 0, %0, c7, c5, 0" : : "r" (0)); ? > > Both compile to the same code. So we should simplify the expression. > > arch/arm/cpu/armv7/cache_v7.c and other modules always uses asm and not > __asm__. > > @Tom: > Can we specify what is preferred in doc/develop/codingstyle.rst? > > https://gcc.gnu.org/onlinedocs/gcc/Alternate-Keywords.html gives some > background.
Sure. -- Tom
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