1 files changed, 32 insertions, 0 deletions
diff --git a/arch/x86/include/asm/post.h b/arch/x86/include/asm/post.h
new file mode 100644
index 0000000000..33711854af
--- /dev/null
+++ b/arch/x86/include/asm/post.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2014 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _post_h
+#define _post_h
+
+/* port to use for post codes */
+#define POST_PORT		0x80
+
+/* post codes which represent various stages of init */
+#define POST_START		0x1e
+#define POST_CAR_START		0x1f
+
+#define POST_START_STACK	0x29
+#define POST_START_DONE		0x2a
+
+/* Output a post code using al - value must be 0 to 0xff */
+#ifdef __ASSEMBLY__
+#define post_code(value) \
+	movb	$value, %al; \
+	outb	%al, $POST_PORT
+#else
+static inline void post_code(int code)
+{
+	outb(code, POST_PORT);
+}
+#endif
+
+#endif