PBL often needs a way to udelay execution. Since we have a generic timer in ARMv8 we can implement a generic udelay.
Signed-off-by: Sascha Hauer <[email protected]> --- arch/arm/lib64/Makefile | 2 +- arch/arm/lib64/pbl.c | 17 +++++++++++++++++ 2 files changed, 18 insertions(+), 1 deletion(-) create mode 100644 arch/arm/lib64/pbl.c diff --git a/arch/arm/lib64/Makefile b/arch/arm/lib64/Makefile index 4c0019fabe..5068431342 100644 --- a/arch/arm/lib64/Makefile +++ b/arch/arm/lib64/Makefile @@ -6,4 +6,4 @@ obj-$(CONFIG_ARM_OPTIMZED_STRING_FUNCTIONS) += memset.o string.o extra-y += barebox.lds obj-pbl-y += runtime-offset.o -pbl-y += div0.o +pbl-y += div0.o pbl.o diff --git a/arch/arm/lib64/pbl.c b/arch/arm/lib64/pbl.c new file mode 100644 index 0000000000..0cef08e4d2 --- /dev/null +++ b/arch/arm/lib64/pbl.c @@ -0,0 +1,17 @@ +#include <asm/system.h> +#include <clock.h> +#include <common.h> + +void udelay(unsigned long us) +{ + unsigned long cntfrq = get_cntfrq(); + unsigned long ticks = (us * cntfrq) / 1000000; + unsigned long start = get_cntpct(); + + while ((long)(start + ticks - get_cntpct()) > 0); +} + +void mdelay(unsigned long ms) +{ + udelay(ms * 1000); +} -- 2.20.1 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
