ARM: Migrate errata to Kconfig

[u-boot] / arch / arm / cpu / armv8 / cpu.c

diff --git a/arch/arm/cpu/armv8/cpu.c b/arch/arm/cpu/armv8/cpu.c
index 5dcb5e290b12e5fbd594ed1b3f5ea55cde8ca64c..28a27f724e60c2549c629aad0aa45083051e3217 100644 (file)
--- 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)
 {
        /*