From: Vineet Gupta <vgu...@kernel.org>
Add __delay implementation based on DBNZ if ZOL is not supported.
Signed-off-by: Vineet Gupta <vgu...@kernel.org>
---
arch/arc/include/asm/delay.h | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/arch/arc/include/asm/delay.h b/arch/arc/include/asm/delay.h
index 54db798f0aa0..e061d1c64f24 100644
--- a/arch/arc/include/asm/delay.h
+++ b/arch/arc/include/asm/delay.h
@@ -16,9 +16,12 @@
#include <asm-generic/types.h>
#include <asm/param.h> /* HZ */
+#include <asm/assembler.h>
extern unsigned long loops_per_jiffy;
+#ifndef CONFIG_ARC_LACKS_ZOL
+
static inline void __delay(unsigned long loops)
{
__asm__ __volatile__(
@@ -31,6 +34,19 @@ static inline void __delay(unsigned long loops)
: "lp_count");
}
+#else
+
+static inline void __delay(unsigned long loops)
+{
+ __asm__ __volatile__(
+ " add %0, %0, 1 \n"
+ "1: nop \n"
+ " DBNZR %0, 1b \n"
+ : "+r"(loops));
+}
+
+#endif
+
extern void __bad_udelay(void);
/*
--
2.25.1
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