forgotten files

[rpikern] / src / asm.h

diff --git a/src/asm.h b/src/asm.h
new file mode 100644 (file)
index 0000000..61d29ac
--- /dev/null
+++ b/src/asm.h
@@ -0,0 +1,13 @@
+#ifndef ASM_H_
+#define ASM_H_
+
+#define enable_intr()  asm volatile ("cpsie i")
+#define disable_intr() asm volatile ("cpsid i")
+#define mem_barrier()  asm volatile ("dmb" ::: "memory")
+
+#define delay(x)  asm volatile ( \
+               "0: subs %0, %0, #1\n\t" \
+               "bne 0b\n\t" \
+               :: "r"(x) : "cc")
+
+#endif /* ASM_H_ */