On Tue, Apr 07, 2020 at 05:32:17PM +0200, Giorgio Dal Molin wrote:
> Prevent the compiler to eventually cache register values read/written
> to/from CP15.
>
> Signed-off-by: Giorgio Dal Molin <giorgio.nicole@xxxxxxxx>
> ---
> arch/arm/cpu/sm.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
Applied, thanks
Sascha
>
> diff --git a/arch/arm/cpu/sm.c b/arch/arm/cpu/sm.c
> index cb33d9625..f5a1edbd4 100644
> --- a/arch/arm/cpu/sm.c
> +++ b/arch/arm/cpu/sm.c
> @@ -26,7 +26,7 @@ static unsigned int read_id_pfr1(void)
> {
> unsigned int reg;
>
> - asm("mrc p15, 0, %0, c0, c1, 1\n" : "=r"(reg));
> + asm volatile ("mrc p15, 0, %0, c0, c1, 1\n" : "=r"(reg));
> return reg;
> }
>
> @@ -34,18 +34,18 @@ static u32 read_nsacr(void)
> {
> unsigned int reg;
>
> - asm("mrc p15, 0, %0, c1, c1, 2\n" : "=r"(reg));
> + asm volatile ("mrc p15, 0, %0, c1, c1, 2\n" : "=r"(reg));
> return reg;
> }
>
> static void write_nsacr(u32 val)
> {
> - asm("mcr p15, 0, %0, c1, c1, 2" : : "r"(val));
> + asm volatile ("mcr p15, 0, %0, c1, c1, 2" : : "r"(val));
> }
>
> static void write_mvbar(u32 val)
> {
> - asm("mcr p15, 0, %0, c12, c0, 1" : : "r"(val));
> + asm volatile ("mcr p15, 0, %0, c12, c0, 1" : : "r"(val));
> }
>
> static int cpu_is_virt_capable(void)
> --
> 2.26.0
>
>
> _______________________________________________
> barebox mailing list
> barebox@xxxxxxxxxxxxxxxxxxx
> http://lists.infradead.org/mailman/listinfo/barebox
>
--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
_______________________________________________
barebox mailing list
barebox@xxxxxxxxxxxxxxxxxxx
http://lists.infradead.org/mailman/listinfo/barebox
