xref: /openbmc/qemu/tests/multiboot/start.S (revision a126050a103c924b03388a9a64ce9af8c96b0969)
1*d1f3a23bSKevin Wolf/*
2*d1f3a23bSKevin Wolf * Copyright (c) 2013 Kevin Wolf <kwolf@redhat.com>
3*d1f3a23bSKevin Wolf *
4*d1f3a23bSKevin Wolf * Permission is hereby granted, free of charge, to any person obtaining a copy
5*d1f3a23bSKevin Wolf * of this software and associated documentation files (the "Software"), to deal
6*d1f3a23bSKevin Wolf * in the Software without restriction, including without limitation the rights
7*d1f3a23bSKevin Wolf * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8*d1f3a23bSKevin Wolf * copies of the Software, and to permit persons to whom the Software is
9*d1f3a23bSKevin Wolf * furnished to do so, subject to the following conditions:
10*d1f3a23bSKevin Wolf *
11*d1f3a23bSKevin Wolf * The above copyright notice and this permission notice shall be included in
12*d1f3a23bSKevin Wolf * all copies or substantial portions of the Software.
13*d1f3a23bSKevin Wolf *
14*d1f3a23bSKevin Wolf * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15*d1f3a23bSKevin Wolf * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16*d1f3a23bSKevin Wolf * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17*d1f3a23bSKevin Wolf * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18*d1f3a23bSKevin Wolf * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19*d1f3a23bSKevin Wolf * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20*d1f3a23bSKevin Wolf * THE SOFTWARE.
21*d1f3a23bSKevin Wolf */
22*d1f3a23bSKevin Wolf
23*d1f3a23bSKevin Wolf.section multiboot
24*d1f3a23bSKevin Wolf
25*d1f3a23bSKevin Wolf#define MB_MAGIC 0x1badb002
26*d1f3a23bSKevin Wolf#define MB_FLAGS 0x0
27*d1f3a23bSKevin Wolf#define MB_CHECKSUM -(MB_MAGIC + MB_FLAGS)
28*d1f3a23bSKevin Wolf
29*d1f3a23bSKevin Wolf.align  4
30*d1f3a23bSKevin Wolf.int    MB_MAGIC
31*d1f3a23bSKevin Wolf.int    MB_FLAGS
32*d1f3a23bSKevin Wolf.int    MB_CHECKSUM
33*d1f3a23bSKevin Wolf
34*d1f3a23bSKevin Wolf.section .text
35*d1f3a23bSKevin Wolf.global _start
36*d1f3a23bSKevin Wolf_start:
37*d1f3a23bSKevin Wolf    mov     $stack, %esp
38*d1f3a23bSKevin Wolf    push    %ebx
39*d1f3a23bSKevin Wolf    push    %eax
40*d1f3a23bSKevin Wolf    call    test_main
41*d1f3a23bSKevin Wolf
42*d1f3a23bSKevin Wolf    /* Test device exit */
43*d1f3a23bSKevin Wolf    outl    %eax, $0xf4
44*d1f3a23bSKevin Wolf
45*d1f3a23bSKevin Wolf    cli
46*d1f3a23bSKevin Wolf    hlt
47*d1f3a23bSKevin Wolf    jmp .
48*d1f3a23bSKevin Wolf
49*d1f3a23bSKevin Wolf.section bss
50*d1f3a23bSKevin Wolf.space 8192
51*d1f3a23bSKevin Wolfstack:
52