Revision dd4b2659
| b/pc-bios/optionrom/multiboot.S | ||
|---|---|---|
| 18 | 18 |
* Authors: Alexander Graf <agraf@suse.de> |
| 19 | 19 |
*/ |
| 20 | 20 |
|
| 21 |
#define NO_QEMU_PROTOS |
|
| 22 |
#include "../../hw/fw_cfg.h" |
|
| 23 |
|
|
| 24 |
#define BIOS_CFG_IOPORT_CFG 0x510 |
|
| 25 |
#define BIOS_CFG_IOPORT_DATA 0x511 |
|
| 21 |
#include "optionrom.h" |
|
| 26 | 22 |
|
| 27 | 23 |
#define MULTIBOOT_MAGIC 0x2badb002 |
| 28 | 24 |
|
| 29 | 25 |
#define GS_PROT_JUMP 0 |
| 30 | 26 |
#define GS_GDT_DESC 6 |
| 31 | 27 |
|
| 32 |
/* Break the translation block flow so -d cpu shows us values */ |
|
| 33 |
#define DEBUG_HERE \ |
|
| 34 |
jmp 1f; \ |
|
| 35 |
1: |
|
| 36 |
|
|
| 37 |
/* Read a variable from the fw_cfg device. |
|
| 38 |
Clobbers: %edx |
|
| 39 |
Out: %eax */ |
|
| 40 |
.macro read_fw VAR |
|
| 41 |
mov $\VAR, %ax |
|
| 42 |
mov $BIOS_CFG_IOPORT_CFG, %dx |
|
| 43 |
outw %ax, (%dx) |
|
| 44 |
mov $BIOS_CFG_IOPORT_DATA, %dx |
|
| 45 |
inb (%dx), %al |
|
| 46 |
shl $8, %eax |
|
| 47 |
inb (%dx), %al |
|
| 48 |
shl $8, %eax |
|
| 49 |
inb (%dx), %al |
|
| 50 |
shl $8, %eax |
|
| 51 |
inb (%dx), %al |
|
| 52 |
bswap %eax |
|
| 53 |
.endm |
|
| 54 | 28 |
|
| 55 |
/* |
|
| 56 |
* Read a blob from the fw_cfg device. |
|
| 57 |
* Requires _ADDR, _SIZE and _DATA values for the parameter. |
|
| 58 |
* |
|
| 59 |
* Clobbers: %eax, %edx, %es, %ecx, %edi |
|
| 60 |
*/ |
|
| 61 |
#define read_fw_blob(var) \ |
|
| 62 |
read_fw var ## _ADDR; \ |
|
| 63 |
mov %eax, %edi; \ |
|
| 64 |
read_fw var ## _SIZE; \ |
|
| 65 |
mov %eax, %ecx; \ |
|
| 66 |
mov $var ## _DATA, %ax; \ |
|
| 67 |
mov $BIOS_CFG_IOPORT_CFG, %edx; \ |
|
| 68 |
outw %ax, (%dx); \ |
|
| 69 |
mov $BIOS_CFG_IOPORT_DATA, %dx; \ |
|
| 70 |
cld; \ |
|
| 71 |
DEBUG_HERE \ |
|
| 72 |
rep insb (%dx), %es:(%edi); |
|
| 73 |
|
|
| 74 |
.code16 |
|
| 75 |
.text |
|
| 76 |
.global _start |
|
| 77 |
_start: |
|
| 78 |
.short 0xaa55 |
|
| 79 |
.byte (_end - _start) / 512 |
|
| 80 |
push %eax |
|
| 81 |
push %ds |
|
| 82 |
|
|
| 83 |
/* setup ds so we can access the IVT */ |
|
| 84 |
xor %ax, %ax |
|
| 85 |
mov %ax, %ds |
|
| 86 |
|
|
| 87 |
/* install our int 19 handler */ |
|
| 88 |
movw $int19_handler, (0x19*4) |
|
| 89 |
mov %cs, (0x19*4+2) |
|
| 90 |
|
|
| 91 |
pop %ds |
|
| 92 |
pop %eax |
|
| 93 |
lret |
|
| 94 |
|
|
| 95 |
int19_handler: |
|
| 96 |
/* DS = CS */ |
|
| 97 |
movw %cs, %ax |
|
| 98 |
movw %ax, %ds |
|
| 99 |
|
|
| 100 |
/* fall through */ |
|
| 29 |
BOOT_ROM_START |
|
| 101 | 30 |
|
| 102 | 31 |
run_multiboot: |
| 103 | 32 |
|
| ... | ... | |
| 249 | 178 |
.short (5 * 8) - 1 |
| 250 | 179 |
.long gdt |
| 251 | 180 |
|
| 252 |
.align 512, 0 |
|
| 253 |
_end: |
|
| 254 |
|
|
| 181 |
BOOT_ROM_END |
|
| b/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 |
#define NO_QEMU_PROTOS |
|
| 23 |
#include "../../hw/fw_cfg.h" |
|
| 24 |
|
|
| 25 |
#define BIOS_CFG_IOPORT_CFG 0x510 |
|
| 26 |
#define BIOS_CFG_IOPORT_DATA 0x511 |
|
| 27 |
|
|
| 28 |
/* Break the translation block flow so -d cpu shows us values */ |
|
| 29 |
#define DEBUG_HERE \ |
|
| 30 |
jmp 1f; \ |
|
| 31 |
1: |
|
| 32 |
|
|
| 33 |
/* |
|
| 34 |
* Read a variable from the fw_cfg device. |
|
| 35 |
* Clobbers: %edx |
|
| 36 |
* Out: %eax |
|
| 37 |
*/ |
|
| 38 |
.macro read_fw VAR |
|
| 39 |
mov $\VAR, %ax |
|
| 40 |
mov $BIOS_CFG_IOPORT_CFG, %dx |
|
| 41 |
outw %ax, (%dx) |
|
| 42 |
mov $BIOS_CFG_IOPORT_DATA, %dx |
|
| 43 |
inb (%dx), %al |
|
| 44 |
shl $8, %eax |
|
| 45 |
inb (%dx), %al |
|
| 46 |
shl $8, %eax |
|
| 47 |
inb (%dx), %al |
|
| 48 |
shl $8, %eax |
|
| 49 |
inb (%dx), %al |
|
| 50 |
bswap %eax |
|
| 51 |
.endm |
|
| 52 |
|
|
| 53 |
/* |
|
| 54 |
* Read a blob from the fw_cfg device. |
|
| 55 |
* Requires _ADDR, _SIZE and _DATA values for the parameter. |
|
| 56 |
* |
|
| 57 |
* Clobbers: %eax, %edx, %es, %ecx, %edi |
|
| 58 |
*/ |
|
| 59 |
#define read_fw_blob(var) \ |
|
| 60 |
read_fw var ## _ADDR; \ |
|
| 61 |
mov %eax, %edi; \ |
|
| 62 |
read_fw var ## _SIZE; \ |
|
| 63 |
mov %eax, %ecx; \ |
|
| 64 |
mov $var ## _DATA, %ax; \ |
|
| 65 |
mov $BIOS_CFG_IOPORT_CFG, %edx; \ |
|
| 66 |
outw %ax, (%dx); \ |
|
| 67 |
mov $BIOS_CFG_IOPORT_DATA, %dx; \ |
|
| 68 |
cld; \ |
|
| 69 |
rep insb (%dx), %es:(%edi); |
|
| 70 |
|
|
| 71 |
#define OPTION_ROM_START \ |
|
| 72 |
.code16; \ |
|
| 73 |
.text; \ |
|
| 74 |
.global _start; \ |
|
| 75 |
_start:; \ |
|
| 76 |
.short 0xaa55; \ |
|
| 77 |
.byte (_end - _start) / 512; |
|
| 78 |
|
|
| 79 |
#define BOOT_ROM_START \ |
|
| 80 |
OPTION_ROM_START \ |
|
| 81 |
push %eax; \ |
|
| 82 |
push %ds; \ |
|
| 83 |
\ |
|
| 84 |
/* setup ds so we can access the IVT */ \ |
|
| 85 |
xor %ax, %ax; \ |
|
| 86 |
mov %ax, %ds; \ |
|
| 87 |
\ |
|
| 88 |
/* install our int 19 handler */ \ |
|
| 89 |
movw $int19_handler, (0x19*4); \ |
|
| 90 |
mov %cs, (0x19*4+2); \ |
|
| 91 |
\ |
|
| 92 |
pop %ds; \ |
|
| 93 |
pop %eax; \ |
|
| 94 |
lret; \ |
|
| 95 |
\ |
|
| 96 |
int19_handler:; \ |
|
| 97 |
/* DS = CS */ \ |
|
| 98 |
movw %cs, %ax; \ |
|
| 99 |
movw %ax, %ds; |
|
| 100 |
|
|
| 101 |
#define OPTION_ROM_END \ |
|
| 102 |
.align 512, 0; \ |
|
| 103 |
_end: |
|
| 104 |
|
|
| 105 |
#define BOOT_ROM_END \ |
|
| 106 |
OPTION_ROM_END |
|
| 107 |
|
|
Also available in: Unified diff