1 /* $NetBSD: pxe_call.S,v 1.2 2002/03/27 17:24:22 kanaoka Exp $ */
4 * Copyright 2001 Wasabi Systems, Inc.
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
39 * Low level PXE BIOS call glue.
42 #include <machine/asm.h>
44 ENTRY(pxecall_bangpxe)
51 /* For simplicity, just move all 32 bits. */
54 pushw _C_LABEL(pxe_command_buf_seg)
55 pushw _C_LABEL(pxe_command_buf_off)
58 call _C_LABEL(prot_to_real) # enter real mode
61 /* The encoding is: 0x9a offlo offhi seglo seghi */
63 .globl _C_LABEL(bangpxe_off)
64 _C_LABEL(bangpxe_off) = . - 4
65 .globl _C_LABEL(bangpxe_seg)
66 _C_LABEL(bangpxe_seg) = . - 2
68 calll _C_LABEL(real_to_prot) # leave real mode
87 /* For simplicity, just move all 32 bits. */
90 call _C_LABEL(prot_to_real) # enter real mode
93 /* prot_to_real() has already set %es to BOOTSEG */
94 lea _C_LABEL(pxe_command_buf), %di
96 /* The encoding is: 0x9a offlo offhi seglo seghi */
98 .globl _C_LABEL(pxenv_off)
99 _C_LABEL(pxenv_off) = . - 4
100 .globl _C_LABEL(pxenv_seg)
101 _C_LABEL(pxenv_seg) = . - 2
103 calll _C_LABEL(real_to_prot) # leave real mode