209ca750b9
Always add a byte before the final 512-bytes alignment to reserve the space for the ROM checksum. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
138 lines
3.2 KiB
C
138 lines
3.2 KiB
C
/*
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* Common Option ROM Functions
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright Novell Inc, 2009
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* Authors: Alexander Graf <agraf@suse.de>
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*/
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#define NO_QEMU_PROTOS
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#include "../../hw/fw_cfg.h"
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#define BIOS_CFG_IOPORT_CFG 0x510
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#define BIOS_CFG_IOPORT_DATA 0x511
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/* Break the translation block flow so -d cpu shows us values */
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#define DEBUG_HERE \
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jmp 1f; \
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1:
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/*
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* Read a variable from the fw_cfg device.
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* Clobbers: %edx
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* Out: %eax
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*/
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.macro read_fw VAR
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mov $\VAR, %ax
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mov $BIOS_CFG_IOPORT_CFG, %dx
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outw %ax, (%dx)
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mov $BIOS_CFG_IOPORT_DATA, %dx
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inb (%dx), %al
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shl $8, %eax
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inb (%dx), %al
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shl $8, %eax
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inb (%dx), %al
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shl $8, %eax
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inb (%dx), %al
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bswap %eax
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.endm
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#define read_fw_blob_pre(var) \
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read_fw var ## _ADDR; \
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mov %eax, %edi; \
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read_fw var ## _SIZE; \
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mov %eax, %ecx; \
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mov $var ## _DATA, %ax; \
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mov $BIOS_CFG_IOPORT_CFG, %edx; \
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outw %ax, (%dx); \
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mov $BIOS_CFG_IOPORT_DATA, %dx; \
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cld
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/*
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* Read a blob from the fw_cfg device.
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* Requires _ADDR, _SIZE and _DATA values for the parameter.
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*
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* Clobbers: %eax, %edx, %es, %ecx, %edi
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*/
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#define read_fw_blob(var) \
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read_fw_blob_pre(var); \
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/* old as(1) doesn't like this insn so emit the bytes instead: \
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rep insb (%dx), %es:(%edi); \
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*/ \
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.dc.b 0xf3,0x6c
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/*
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* Read a blob from the fw_cfg device in forced addr32 mode.
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* Requires _ADDR, _SIZE and _DATA values for the parameter.
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*
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* Clobbers: %eax, %edx, %es, %ecx, %edi
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*/
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#define read_fw_blob_addr32(var) \
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read_fw_blob_pre(var); \
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/* old as(1) doesn't like this insn so emit the bytes instead: \
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addr32 rep insb (%dx), %es:(%edi); \
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*/ \
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.dc.b 0x67,0xf3,0x6c
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#define OPTION_ROM_START \
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.code16; \
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.text; \
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.global _start; \
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_start:; \
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.short 0xaa55; \
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.byte (_end - _start) / 512;
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#define BOOT_ROM_START \
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OPTION_ROM_START \
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lret; \
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.org 0x18; \
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.short 0; \
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.short _pnph; \
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_pnph: \
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.ascii "$PnP"; \
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.byte 0x01; \
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.byte ( _pnph_len / 16 ); \
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.short 0x0000; \
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.byte 0x00; \
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.byte 0x00; \
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.long 0x00000000; \
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.short _manufacturer; \
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.short _product; \
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.long 0x00000000; \
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.short 0x0000; \
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.short 0x0000; \
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.short _bev; \
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.short 0x0000; \
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.short 0x0000; \
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.equ _pnph_len, . - _pnph; \
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_bev:; \
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/* DS = CS */ \
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movw %cs, %ax; \
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movw %ax, %ds;
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#define OPTION_ROM_END \
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.byte 0; \
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.align 512, 0; \
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_end:
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#define BOOT_ROM_END \
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_manufacturer:; \
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.asciz "QEMU"; \
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_product:; \
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.asciz BOOT_ROM_PRODUCT; \
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OPTION_ROM_END
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