migration: rename unix.c to socket.c
[qemu.git] / pc-bios / optionrom / optionrom.h
1 /*
2 * Common Option ROM Functions
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
16 *
17 * Copyright Novell Inc, 2009
18 * Authors: Alexander Graf <agraf@suse.de>
19 */
20
21
22 #include "../../include/hw/nvram/fw_cfg_keys.h"
23
24 #define BIOS_CFG_IOPORT_CFG 0x510
25 #define BIOS_CFG_IOPORT_DATA 0x511
26
27 /* Break the translation block flow so -d cpu shows us values */
28 #define DEBUG_HERE \
29 jmp 1f; \
30 1:
31
32 /*
33 * Read a variable from the fw_cfg device.
34 * Clobbers: %edx
35 * Out: %eax
36 */
37 .macro read_fw VAR
38 mov $\VAR, %ax
39 mov $BIOS_CFG_IOPORT_CFG, %dx
40 outw %ax, (%dx)
41 mov $BIOS_CFG_IOPORT_DATA, %dx
42 inb (%dx), %al
43 shl $8, %eax
44 inb (%dx), %al
45 shl $8, %eax
46 inb (%dx), %al
47 shl $8, %eax
48 inb (%dx), %al
49 bswap %eax
50 .endm
51
52 #define read_fw_blob_pre(var) \
53 read_fw var ## _SIZE; \
54 mov %eax, %ecx; \
55 mov $var ## _DATA, %ax; \
56 mov $BIOS_CFG_IOPORT_CFG, %edx; \
57 outw %ax, (%dx); \
58 mov $BIOS_CFG_IOPORT_DATA, %dx; \
59 cld
60
61 /*
62 * Read a blob from the fw_cfg device.
63 * Requires _ADDR, _SIZE and _DATA values for the parameter.
64 *
65 * Clobbers: %eax, %edx, %es, %ecx, %edi
66 */
67 #define read_fw_blob(var) \
68 read_fw var ## _ADDR; \
69 mov %eax, %edi; \
70 read_fw_blob_pre(var); \
71 /* old as(1) doesn't like this insn so emit the bytes instead: \
72 rep insb (%dx), %es:(%edi); \
73 */ \
74 .dc.b 0xf3,0x6c
75
76 /*
77 * Read a blob from the fw_cfg device in forced addr32 mode.
78 * Requires _ADDR, _SIZE and _DATA values for the parameter.
79 *
80 * Clobbers: %eax, %edx, %es, %ecx, %edi
81 */
82 #define read_fw_blob_addr32(var) \
83 read_fw var ## _ADDR; \
84 mov %eax, %edi; \
85 read_fw_blob_pre(var); \
86 /* old as(1) doesn't like this insn so emit the bytes instead: \
87 addr32 rep insb (%dx), %es:(%edi); \
88 */ \
89 .dc.b 0x67,0xf3,0x6c
90
91 /*
92 * Read a blob from the fw_cfg device in forced addr32 mode, address is in %edi.
93 * Requires _SIZE and _DATA values for the parameter.
94 *
95 * Clobbers: %eax, %edx, %edi, %es, %ecx
96 */
97 #define read_fw_blob_addr32_edi(var) \
98 read_fw_blob_pre(var); \
99 /* old as(1) doesn't like this insn so emit the bytes instead: \
100 addr32 rep insb (%dx), %es:(%edi); \
101 */ \
102 .dc.b 0x67,0xf3,0x6c
103
104 #define OPTION_ROM_START \
105 .code16; \
106 .text; \
107 .global _start; \
108 _start:; \
109 .short 0xaa55; \
110 .byte (_end - _start) / 512;
111
112 #define BOOT_ROM_START \
113 OPTION_ROM_START \
114 lret; \
115 .org 0x18; \
116 .short 0; \
117 .short _pnph; \
118 _pnph: \
119 .ascii "$PnP"; \
120 .byte 0x01; \
121 .byte ( _pnph_len / 16 ); \
122 .short 0x0000; \
123 .byte 0x00; \
124 .byte 0x00; \
125 .long 0x00000000; \
126 .short _manufacturer; \
127 .short _product; \
128 .long 0x00000000; \
129 .short 0x0000; \
130 .short 0x0000; \
131 .short _bev; \
132 .short 0x0000; \
133 .short 0x0000; \
134 .equ _pnph_len, . - _pnph; \
135 _bev:; \
136 /* DS = CS */ \
137 movw %cs, %ax; \
138 movw %ax, %ds;
139
140 #define OPTION_ROM_END \
141 .byte 0; \
142 .align 512, 0; \
143 _end:
144
145 #define BOOT_ROM_END \
146 _manufacturer:; \
147 .asciz "QEMU"; \
148 _product:; \
149 .asciz BOOT_ROM_PRODUCT; \
150 OPTION_ROM_END
151