X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=arch%2Farm%2Fcpu%2Farmv8%2Fcpu.c;h=28a27f724e60c2549c629aad0aa45083051e3217;hb=8dda2e2f9e0976249f4a390e72f12533dbcb5ef4;hp=5dcb5e290b12e5fbd594ed1b3f5ea55cde8ca64c;hpb=8ea05705a70135a94419b0d243666c1b51fe1f8d;p=u-boot

diff --git a/arch/arm/cpu/armv8/cpu.c b/arch/arm/cpu/armv8/cpu.c
index 5dcb5e290b..28a27f724e 100644
--- a/arch/arm/cpu/armv8/cpu.c
+++ b/arch/arm/cpu/armv8/cpu.c
@@ -17,6 +17,20 @@
 #include <asm/secure.h>
 #include <linux/compiler.h>
 
+/*
+ * sdelay() - simple spin loop.
+ *
+ * Will delay execution by roughly (@loops * 2) cycles.
+ * This is necessary to be used before timers are accessible.
+ *
+ * A value of "0" will results in 2^64 loops.
+ */
+void sdelay(unsigned long loops)
+{
+	__asm__ volatile ("1:\n" "subs %0, %0, #1\n"
+			  "b.ne 1b" : "=r" (loops) : "0"(loops) : "cc");
+}
+
 int cleanup_before_linux(void)
 {
 	/*