2 * Common Option ROM Functions
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.
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.
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/>.
17 * Copyright Novell Inc, 2009
18 * Authors: Alexander Graf <agraf@suse.de>
22 #define NO_QEMU_PROTOS
23 #include "../../hw/fw_cfg.h"
25 #define BIOS_CFG_IOPORT_CFG 0x510
26 #define BIOS_CFG_IOPORT_DATA 0x511
28 /* Break the translation block flow so -d cpu shows us values */
34 * Read a variable from the fw_cfg device.
40 mov $BIOS_CFG_IOPORT_CFG
, %dx
42 mov $BIOS_CFG_IOPORT_DATA
, %dx
54 * Read a blob from the fw_cfg device.
55 * Requires _ADDR, _SIZE and _DATA values for the parameter.
57 * Clobbers: %eax, %edx, %es, %ecx, %edi
59 #define read_fw_blob(var) \
60 read_fw var ## _ADDR; \
62 read_fw var ## _SIZE; \
64 mov $var ## _DATA, %ax; \
65 mov $BIOS_CFG_IOPORT_CFG, %edx; \
67 mov $BIOS_CFG_IOPORT_DATA, %dx; \
69 /* old as(1) doesn't like this insn so emit the bytes instead: \
70 rep insb (%dx), %es:(%edi); \
74 #define OPTION_ROM_START \
80 .byte (_end - _start) / 512;
82 #define BOOT_ROM_START \
87 /* setup ds so we can access the IVT */ \
91 /* install our int 19 handler */ \
92 movw $int19_handler, (0x19*4); \
93 mov %cs, (0x19*4+2); \
104 #define OPTION_ROM_END \
108 #define BOOT_ROM_END \