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-rw-r--r--kernel/arch/x86/boot/regs.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/kernel/arch/x86/boot/regs.c b/kernel/arch/x86/boot/regs.c
new file mode 100644
index 000000000..c0fb356a3
--- /dev/null
+++ b/kernel/arch/x86/boot/regs.c
@@ -0,0 +1,30 @@
+/* -----------------------------------------------------------------------
+ *
+ * Copyright 2009 Intel Corporation; author H. Peter Anvin
+ *
+ * This file is part of the Linux kernel, and is made available under
+ * the terms of the GNU General Public License version 2 or (at your
+ * option) any later version; incorporated herein by reference.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * Simple helper function for initializing a register set.
+ *
+ * Note that this sets EFLAGS_CF in the input register set; this
+ * makes it easier to catch functions which do nothing but don't
+ * explicitly set CF.
+ */
+
+#include "boot.h"
+#include "string.h"
+
+void initregs(struct biosregs *reg)
+{
+ memset(reg, 0, sizeof *reg);
+ reg->eflags |= X86_EFLAGS_CF;
+ reg->ds = ds();
+ reg->es = ds();
+ reg->fs = fs();
+ reg->gs = gs();
+}