arch: arc: add sys_write64/sys_read64 functions

Added sys_read64 and sys_write64 functions for 64-bit memory
operations when building for 64-bit.

Signed-off-by: Benjamin Cabé <[email protected]>
Signed-off-by: Yong Cong Sin <[email protected]>
Signed-off-by: Yong Cong Sin <[email protected]>

Author: ycsin

include/zephyr/arch/arc/sys-io-common.h

@@ -74,6 +74,26 @@ static ALWAYS_INLINE void sys_write32(uint32_t data, mem_addr_t addr)
 	compiler_barrier();
 }
 
+#ifdef CONFIG_64BIT
+static ALWAYS_INLINE uint64_t sys_read64(mem_addr_t addr)
+{
+	uint64_t value;
+
+	compiler_barrier();
+	value = *(volatile uint64_t *)addr;
+	compiler_barrier();
+
+	return value;
+}
+
+static ALWAYS_INLINE void sys_write64(uint64_t data, mem_addr_t addr)
+{
+	compiler_barrier();
+	*(volatile uint64_t *)addr = data;
+	compiler_barrier();
+}
+#endif /* CONFIG_64BIT */
+
 #ifdef __cplusplus
 }
 #endif