[mirror_qemu.git] / pc-bios / optionrom / optionrom.h

/*
 * Common Option ROM Functions
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 * Copyright Novell Inc, 2009
 *   Authors: Alexander Graf <agraf@suse.de>
 */


#define NO_QEMU_PROTOS
#include "../../include/hw/nvram/fw_cfg.h"

#define BIOS_CFG_IOPORT_CFG	0x510
#define BIOS_CFG_IOPORT_DATA	0x511

/* Break the translation block flow so -d cpu shows us values */
#define DEBUG_HERE \
	jmp		1f;				\
	1:
	
/*
 * Read a variable from the fw_cfg device.
 * Clobbers:	%edx
 * Out:		%eax
 */
.macro read_fw VAR
	mov		$\VAR, %ax
	mov		$BIOS_CFG_IOPORT_CFG, %dx
	outw		%ax, (%dx)
	mov		$BIOS_CFG_IOPORT_DATA, %dx
	inb		(%dx), %al
	shl		$8, %eax
	inb		(%dx), %al
	shl		$8, %eax
	inb		(%dx), %al
	shl		$8, %eax
	inb		(%dx), %al
	bswap		%eax
.endm

#define read_fw_blob_pre(var)				\
	read_fw		var ## _ADDR;			\
	mov		%eax, %edi;			\
	read_fw		var ## _SIZE;			\
	mov		%eax, %ecx;			\
	mov		$var ## _DATA, %ax;		\
	mov		$BIOS_CFG_IOPORT_CFG, %edx;	\
	outw		%ax, (%dx);			\
	mov		$BIOS_CFG_IOPORT_DATA, %dx;	\
	cld

/*
 * Read a blob from the fw_cfg device.
 * Requires _ADDR, _SIZE and _DATA values for the parameter.
 *
 * Clobbers:	%eax, %edx, %es, %ecx, %edi
 */
#define read_fw_blob(var)				\
	read_fw_blob_pre(var);				\
	/* old as(1) doesn't like this insn so emit the bytes instead: \
	rep insb	(%dx), %es:(%edi);		\
	*/						\
	.dc.b		0xf3,0x6c

/*
 * Read a blob from the fw_cfg device in forced addr32 mode.
 * Requires _ADDR, _SIZE and _DATA values for the parameter.
 *
 * Clobbers:	%eax, %edx, %es, %ecx, %edi
 */
#define read_fw_blob_addr32(var)				\
	read_fw_blob_pre(var);				\
	/* old as(1) doesn't like this insn so emit the bytes instead: \
	addr32 rep insb	(%dx), %es:(%edi);		\
	*/						\
	.dc.b		0x67,0xf3,0x6c

#define OPTION_ROM_START					\
    .code16;						\
    .text;						\
	.global 	_start;				\
    _start:;						\
	.short		0xaa55;				\
	.byte		(_end - _start) / 512;

#define BOOT_ROM_START					\
	OPTION_ROM_START				\
	lret;						\
	.org 		0x18;				\
	.short		0;				\
	.short		_pnph;				\
    _pnph:						\
	.ascii		"$PnP";				\
	.byte		0x01;				\
	.byte		( _pnph_len / 16 );		\
	.short		0x0000;				\
	.byte		0x00;				\
	.byte		0x00;				\
	.long		0x00000000;			\
	.short		_manufacturer;			\
	.short		_product;			\
	.long		0x00000000;			\
	.short		0x0000;				\
	.short		0x0000;				\
	.short		_bev;				\
	.short		0x0000;				\
	.short		0x0000;				\
	.equ		_pnph_len, . - _pnph;		\
    _bev:;						\
	/* DS = CS */					\
	movw		%cs, %ax;			\
	movw		%ax, %ds;

#define OPTION_ROM_END					\
	.byte		0;				\
	.align		512, 0;				\
    _end:

#define BOOT_ROM_END					\
    _manufacturer:;					\
	.asciz "QEMU";					\
    _product:;						\
	.asciz BOOT_ROM_PRODUCT;			\
	OPTION_ROM_END
Commit	Line	Data
dd4b2659 AG	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
0d09e41a	23	#include "../../include/hw/nvram/fw_cfg.h"
dd4b2659 AG	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
590bf491	53	#define read_fw_blob_pre(var) \
dd4b2659 AG	54	read_fw var ## _ADDR; \
	55	mov %eax, %edi; \
	56	read_fw var ## _SIZE; \
	57	mov %eax, %ecx; \
	58	mov $var ## _DATA, %ax; \
	59	mov $BIOS_CFG_IOPORT_CFG, %edx; \
	60	outw %ax, (%dx); \
	61	mov $BIOS_CFG_IOPORT_DATA, %dx; \
590bf491 AG	62	cld
	63
	64	/*
	65	* Read a blob from the fw_cfg device.
	66	* Requires _ADDR, _SIZE and _DATA values for the parameter.
	67	*
	68	* Clobbers: %eax, %edx, %es, %ecx, %edi
	69	*/
	70	#define read_fw_blob(var) \
	71	read_fw_blob_pre(var); \
dd4239d6 JL	72	/* old as(1) doesn't like this insn so emit the bytes instead: \
	73	rep insb (%dx), %es:(%edi); \
	74	*/ \
590bf491 AG	75	.dc.b 0xf3,0x6c
	76
	77	/*
	78	* Read a blob from the fw_cfg device in forced addr32 mode.
	79	* Requires _ADDR, _SIZE and _DATA values for the parameter.
	80	*
	81	* Clobbers: %eax, %edx, %es, %ecx, %edi
	82	*/
	83	#define read_fw_blob_addr32(var) \
	84	read_fw_blob_pre(var); \
	85	/* old as(1) doesn't like this insn so emit the bytes instead: \
	86	addr32 rep insb (%dx), %es:(%edi); \
	87	*/ \
dd4239d6	88	.dc.b 0x67,0xf3,0x6c
dd4b2659 AG	89
	90	#define OPTION_ROM_START \
	91	.code16; \
	92	.text; \
	93	.global _start; \
	94	_start:; \
	95	.short 0xaa55; \
	96	.byte (_end - _start) / 512;
	97
	98	#define BOOT_ROM_START \
	99	OPTION_ROM_START \
dd4b2659	100	lret; \
75b9f690 GN	101	.org 0x18; \
	102	.short 0; \
	103	.short _pnph; \
	104	_pnph: \
	105	.ascii "$PnP"; \
	106	.byte 0x01; \
	107	.byte ( _pnph_len / 16 ); \
	108	.short 0x0000; \
	109	.byte 0x00; \
	110	.byte 0x00; \
	111	.long 0x00000000; \
	112	.short _manufacturer; \
	113	.short _product; \
	114	.long 0x00000000; \
	115	.short 0x0000; \
	116	.short 0x0000; \
	117	.short _bev; \
	118	.short 0x0000; \
	119	.short 0x0000; \
	120	.equ _pnph_len, . - _pnph; \
	121	_bev:; \
dd4b2659 AG	122	/* DS = CS */ \
	123	movw %cs, %ax; \
	124	movw %ax, %ds;
	125
	126	#define OPTION_ROM_END \
209ca750 JK	127	.byte 0; \
209ca750 JK	128	.align 512, 0; \
dd4b2659 AG	129	_end:
	130
	131	#define BOOT_ROM_END \
75b9f690 GN	132	_manufacturer:; \
	133	.asciz "QEMU"; \
	134	_product:; \
	135	.asciz BOOT_ROM_PRODUCT; \
dd4b2659 AG	136	OPTION_ROM_END
dd4b2659 AG	137