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 <s.hauer@xxxxxxxxxxxxxx>
---
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
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