riscv64: implement memory barriers

Change-Id: Ied9e6dad38968cee6e828dff6ec413e6281086cd Reviewed-on: https://review.haiku-os.org/c/haiku/+/6436 Reviewed-by: waddlesplash <[email protected]>
2023-05-10 20:55:18 +00:00
parent 88306be95c
commit 6550124ea0
1 changed files with 3 additions and 5 deletions
@@ -12,23 +12,21 @@
 static inline void
 memory_read_barrier_inline(void)
 {
-	// TODO: investigate reparate read/write barriers
-	__sync_synchronize();
+	asm volatile("fence ir, ir" : : : "memory");
 }


 static inline void
 memory_write_barrier_inline(void)
 {
-	// TODO: investigate reparate read/write barriers
-	__sync_synchronize();
+	asm volatile("fence ow, ow" : : : "memory");
 }


 static inline void
 memory_full_barrier_inline(void)
 {
-	__sync_synchronize();
+	asm volatile("fence iorw, iorw" : : : "memory");
 }