On Wed, 2 Oct 2024 at 03:57, Patrick Rudolph <patrick.rudo...@9elements.com> wrote: > > Implement read_mpidr() on armv7 to make use of it in generic > code that compiles on both armv7 and armv8. > > Signed-off-by: Patrick Rudolph <patrick.rudo...@9elements.com> > --- > arch/arm/include/asm/system.h | 9 +++++++++ > 1 file changed, 9 insertions(+) >
Reviewed-by: Simon Glass <s...@chromium.org> > diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h > index 7e30cac32a..94c6f8f134 100644 > --- a/arch/arm/include/asm/system.h > +++ b/arch/arm/include/asm/system.h > @@ -384,6 +384,15 @@ void switch_to_hypervisor_ret(void); > #define wfi() > #endif > > +static inline unsigned long read_mpidr(void) > +{ > + unsigned long val; > + > + asm volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (val)); > + > + return val; > +} > + > static inline unsigned long get_cpsr(void) > { > unsigned long cpsr; > -- > 2.46.2 >