1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* -----------------------------------------------------------------------
3 *
4 * Copyright 2009 Intel Corporation; author H. Peter Anvin
5 *
6 * ----------------------------------------------------------------------- */
7
8 /*
9 * Simple helper function for initializing a register set.
10 *
11 * Note that this sets EFLAGS_CF in the input register set; this
12 * makes it easier to catch functions which do nothing but don't
13 * explicitly set CF.
14 */
15
16 #include "boot.h"
17 #include "string.h"
18
19 void initregs(struct biosregs *reg)
20 {
21 memset(reg, 0, sizeof(*reg));
22 reg->eflags |= X86_EFLAGS_CF;
23 reg->ds = ds();
24 reg->es = ds();
25 reg->fs = fs();
26 reg->gs = gs();
27 }
28
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