summaryrefslogtreecommitdiffstats
path: root/arch/x86/realmode/rm/realmode.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/realmode/rm/realmode.h')
-rw-r--r--arch/x86/realmode/rm/realmode.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/x86/realmode/rm/realmode.h b/arch/x86/realmode/rm/realmode.h
new file mode 100644
index 0000000000..c76041a353
--- /dev/null
+++ b/arch/x86/realmode/rm/realmode.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef ARCH_X86_REALMODE_RM_REALMODE_H
+#define ARCH_X86_REALMODE_RM_REALMODE_H
+
+#ifdef __ASSEMBLY__
+
+/*
+ * 16-bit ljmpw to the real_mode_seg
+ *
+ * This must be open-coded since gas will choke on using a
+ * relocatable symbol for the segment portion.
+ */
+#define LJMPW_RM(to) .byte 0xea ; .word (to), real_mode_seg
+
+#endif /* __ASSEMBLY__ */
+
+/*
+ * Signature at the end of the realmode region
+ */
+#define REALMODE_END_SIGNATURE 0x65a22c82
+
+#endif /* ARCH_X86_REALMODE_RM_REALMODE_H */