Added support for VESA Bios Extension to i386 kernel.
This commit is contained in:
chaac
parent
c46153d28f
commit
e85e144bfc
4 changed files with 635 additions and 8 deletions
18
ChangeLog
18
ChangeLog
|
|
@ -1,3 +1,21 @@
|
|||
2005-08-09 Vesa Jaaskelainen <chaac@nic.fi>
|
||||
|
||||
* conf/i386-pc.rmk (kernel_img_HEADERS): Added machine/vbe.h.
|
||||
* kern/i386/pc/startup.S: Updated Global Descriptor table's
|
||||
descriptions.
|
||||
(grub_vbe_get_controller_info): New function.
|
||||
(grub_vbe_get_mode_info): Likewise.
|
||||
(grub_vbe_set_mode): Likewise.
|
||||
(grub_vbe_get_mode): Likewise.
|
||||
(grub_vbe_set_memory_window): Likewise.
|
||||
(grub_vbe_get_memory_window): Likewise.
|
||||
(grub_vbe_set_scanline_length): Likewise.
|
||||
(grub_vbe_get_scanline_length): Likewise.
|
||||
(grub_vbe_set_display_start): Likewise.
|
||||
(grub_vbe_get_display_start): Likewise.
|
||||
(grub_vbe_set_palette_data): Likewise.
|
||||
* include/grub/i386/pc/vbe.h: New file.
|
||||
|
||||
2005-08-08 Hollis Blanchard <hollis@penguinppc.org>
|
||||
|
||||
* conf/powerpc-ieee1275.rmk (grubof_SOURCES): Replaced
|
||||
|
|
|
|||
|
|
@ -33,7 +33,8 @@ kernel_img_HEADERS = arg.h boot.h device.h disk.h dl.h elf.h env.h err.h \
|
|||
file.h fs.h kernel.h loader.h misc.h mm.h net.h partition.h \
|
||||
pc_partition.h rescue.h symbol.h term.h types.h \
|
||||
machine/biosdisk.h machine/boot.h machine/console.h machine/init.h \
|
||||
machine/memory.h machine/loader.h machine/time.h machine/vga.h
|
||||
machine/memory.h machine/loader.h machine/time.h machine/vga.h \
|
||||
machine/vbe.h
|
||||
kernel_img_CFLAGS = $(COMMON_CFLAGS)
|
||||
kernel_img_ASFLAGS = $(COMMON_ASFLAGS)
|
||||
kernel_img_LDFLAGS = -nostdlib -Wl,-N,-Ttext,8200
|
||||
|
|
|
|||
184
include/grub/i386/pc/vbe.h
Normal file
184
include/grub/i386/pc/vbe.h
Normal file
|
|
@ -0,0 +1,184 @@
|
|||
/*
|
||||
* GRUB -- GRand Unified Bootloader
|
||||
* Copyright (C) 2005 Free Software Foundation, Inc.
|
||||
*
|
||||
* 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, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
#ifndef GRUB_VBE_MACHINE_HEADER
|
||||
#define GRUB_VBE_MACHINE_HEADER 1
|
||||
|
||||
#include <grub/symbol.h>
|
||||
#include <grub/types.h>
|
||||
|
||||
/* Note:
|
||||
|
||||
Please refer to VESA BIOS Extension 3.0 Specification for more descriptive
|
||||
meanings of following structures and how they should be used.
|
||||
|
||||
I have tried to maintain field name comatibility against specification
|
||||
while following naming convetions used in GRUB. */
|
||||
|
||||
typedef grub_uint32_t grub_vbe_farptr_t;
|
||||
typedef grub_uint32_t grub_vbe_physptr_t;
|
||||
typedef grub_uint32_t grub_vbe_status_t;
|
||||
|
||||
struct grub_vbe_info_block
|
||||
{
|
||||
grub_uint8_t signature[4];
|
||||
grub_uint16_t version;
|
||||
|
||||
grub_vbe_farptr_t oem_string_ptr;
|
||||
grub_uint32_t capabilities;
|
||||
grub_vbe_farptr_t video_mode_ptr;
|
||||
grub_uint16_t total_memory;
|
||||
|
||||
grub_uint16_t oem_software_rev;
|
||||
grub_vbe_farptr_t oem_vendor_name_ptr;
|
||||
grub_vbe_farptr_t oem_product_name_ptr;
|
||||
grub_vbe_farptr_t oem_product_rev_ptr;
|
||||
|
||||
grub_uint8_t reserved[222];
|
||||
|
||||
grub_uint8_t oem_data[256];
|
||||
} __attribute__ ((packed));
|
||||
|
||||
struct grub_vbe_mode_info_block
|
||||
{
|
||||
/* Mandory information for all VBE revisions. */
|
||||
grub_uint16_t mode_attributes;
|
||||
grub_uint8_t win_a_attributes;
|
||||
grub_uint8_t win_b_attributes;
|
||||
grub_uint16_t win_granularity;
|
||||
grub_uint16_t win_size;
|
||||
grub_uint16_t win_a_segment;
|
||||
grub_uint16_t win_b_segment;
|
||||
grub_vbe_farptr_t win_func_ptr;
|
||||
grub_uint16_t bytes_per_scan_line;
|
||||
|
||||
/* Mandory information for VBE 1.2 and above. */
|
||||
grub_uint16_t x_resolution;
|
||||
grub_uint16_t y_resolution;
|
||||
grub_uint8_t x_char_size;
|
||||
grub_uint8_t y_char_size;
|
||||
grub_uint8_t number_of_planes;
|
||||
grub_uint8_t bits_per_pixel;
|
||||
grub_uint8_t number_of_banks;
|
||||
grub_uint8_t memory_model;
|
||||
grub_uint8_t bank_size;
|
||||
grub_uint8_t number_of_image_pages;
|
||||
grub_uint8_t reserved;
|
||||
|
||||
/* Direct Color fields (required for direct/6 and YUV/7 memory models). */
|
||||
grub_uint8_t red_mask_size;
|
||||
grub_uint8_t red_field_position;
|
||||
grub_uint8_t green_mask_size;
|
||||
grub_uint8_t green_field_position;
|
||||
grub_uint8_t blue_mask_size;
|
||||
grub_uint8_t blue_field_position;
|
||||
grub_uint8_t rsvd_mask_size;
|
||||
grub_uint8_t rsvd_field_position;
|
||||
grub_uint8_t direct_color_mode_info;
|
||||
|
||||
/* Mandory information for VBE 2.0 and above. */
|
||||
grub_vbe_physptr_t phys_base_addr;
|
||||
grub_uint32_t reserved2;
|
||||
grub_uint16_t reserved3;
|
||||
|
||||
/* Mandory information for VBE 3.0 and above. */
|
||||
grub_uint16_t lin_bytes_per_scan_line;
|
||||
grub_uint8_t bnk_number_of_image_pages;
|
||||
grub_uint8_t lin_number_of_image_pages;
|
||||
grub_uint8_t lin_red_mask_size;
|
||||
grub_uint8_t lin_red_field_position;
|
||||
grub_uint8_t lin_green_mask_size;
|
||||
grub_uint8_t lin_green_field_position;
|
||||
grub_uint8_t lin_blue_mask_size;
|
||||
grub_uint8_t lin_blue_field_position;
|
||||
grub_uint8_t lin_rsvd_mask_size;
|
||||
grub_uint8_t lin_rsvd_field_position;
|
||||
grub_uint32_t max_pixel_clock;
|
||||
|
||||
/* Reserved field to make structure to be 256 bytes long, VESA BIOS
|
||||
Extension 3.0 Specification says to reserve 189 bytes here but
|
||||
that doesn't make structure to be 256 bytes. So additional one is
|
||||
added here. */
|
||||
grub_uint8_t reserved4[189 + 1];
|
||||
} __attribute__ ((packed));
|
||||
|
||||
struct grub_vbe_crtc_info_block
|
||||
{
|
||||
grub_uint16_t horizontal_total;
|
||||
grub_uint16_t horizontal_sync_start;
|
||||
grub_uint16_t horizontal_sync_end;
|
||||
grub_uint16_t vertical_total;
|
||||
grub_uint16_t vertical_sync_start;
|
||||
grub_uint16_t vertical_sync_end;
|
||||
grub_uint8_t flags;
|
||||
grub_uint32_t pixel_clock;
|
||||
grub_uint16_t refresh_rate;
|
||||
grub_uint8_t reserved[40];
|
||||
} __attribute__ ((packed));
|
||||
|
||||
struct grub_vbe_palette_data
|
||||
{
|
||||
grub_uint8_t blue;
|
||||
grub_uint8_t green;
|
||||
grub_uint8_t red;
|
||||
grub_uint8_t aligment;
|
||||
} __attribute__ ((packed));
|
||||
|
||||
/* Call VESA BIOS 0x4f00 to get VBE Controller Information, return status. */
|
||||
grub_vbe_status_t EXPORT_FUNC(grub_vbe_get_controller_info) (struct grub_vbe_info_block *controller_info);
|
||||
|
||||
/* Call VESA BIOS 0x4f01 to get VBE Mode Information, return status. */
|
||||
grub_vbe_status_t EXPORT_FUNC(grub_vbe_get_mode_info) (grub_uint32_t mode,
|
||||
struct grub_vbe_mode_info_block *mode_info);
|
||||
|
||||
/* Call VESA BIOS 0x4f02 to set video mode, return status. */
|
||||
grub_vbe_status_t EXPORT_FUNC(grub_vbe_set_mode) (grub_uint32_t mode,
|
||||
struct grub_vbe_crtc_info_block *crtc_info);
|
||||
|
||||
/* Call VESA BIOS 0x4f03 to return current VBE Mode, return status. */
|
||||
grub_vbe_status_t EXPORT_FUNC(grub_vbe_get_mode) (grub_uint32_t *mode);
|
||||
|
||||
/* Call VESA BIOS 0x4f05 to set memory window, return status. */
|
||||
grub_vbe_status_t EXPORT_FUNC(grub_vbe_set_memory_window) (grub_uint32_t window,
|
||||
grub_uint32_t position);
|
||||
|
||||
/* Call VESA BIOS 0x4f05 to return memory window, return status. */
|
||||
grub_vbe_status_t EXPORT_FUNC(grub_vbe_get_memory_window) (grub_uint32_t window,
|
||||
grub_uint32_t *position);
|
||||
|
||||
/* Call VESA BIOS 0x4f06 to set scanline length (in bytes), return status. */
|
||||
grub_vbe_status_t EXPORT_FUNC(grub_vbe_set_scanline_length) (grub_uint32_t length);
|
||||
|
||||
/* Call VESA BIOS 0x4f06 to return scanline length (in bytes), return status. */
|
||||
grub_vbe_status_t EXPORT_FUNC(grub_vbe_get_scanline_length) (grub_uint32_t *length);
|
||||
|
||||
/* Call VESA BIOS 0x4f07 to set display start, return status. */
|
||||
grub_vbe_status_t EXPORT_FUNC(grub_vbe_set_display_start) (grub_uint32_t x,
|
||||
grub_uint32_t y);
|
||||
|
||||
/* Call VESA BIOS 0x4f07 to get display start, return status. */
|
||||
grub_vbe_status_t EXPORT_FUNC(grub_vbe_get_display_start) (grub_uint32_t *x,
|
||||
grub_uint32_t *y);
|
||||
|
||||
/* Call VESA BIOS 0x4f09 to set palette data, return status. */
|
||||
grub_vbe_status_t EXPORT_FUNC(grub_vbe_set_palette_data) (grub_uint32_t color_count,
|
||||
grub_uint32_t start_index,
|
||||
struct grub_vbe_palette_data *palette_data);
|
||||
|
||||
#endif /* ! GRUB_VBE_MACHINE_HEADER */
|
||||
|
|
@ -1,6 +1,6 @@
|
|||
/*
|
||||
* GRUB -- GRand Unified Bootloader
|
||||
* Copyright (C) 1999,2000,2001,2002,2003 Free Software Foundation, Inc.
|
||||
* Copyright (C) 1999,2000,2001,2002,2003,2005 Free Software Foundation, Inc.
|
||||
*
|
||||
* 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
|
||||
|
|
@ -219,11 +219,11 @@ VARIABLE(grub_apm_bios_info)
|
|||
* 31 24 19 16 7 0
|
||||
* ------------------------------------------------------------
|
||||
* | | |B| |A| | | |1|0|E|W|A| |
|
||||
* | BASE 31..24 |G|/|0|V| LIMIT |P|DPL| TYPE | BASE 23:16 |
|
||||
* | BASE 31..24 |G|/|L|V| LIMIT |P|DPL| TYPE | BASE 23:16 | 4
|
||||
* | | |D| |L| 19..16| | |1|1|C|R|A| |
|
||||
* ------------------------------------------------------------
|
||||
* | | |
|
||||
* | BASE 15..0 | LIMIT 15..0 |
|
||||
* | BASE 15..0 | LIMIT 15..0 | 0
|
||||
* | | |
|
||||
* ------------------------------------------------------------
|
||||
*
|
||||
|
|
@ -236,19 +236,31 @@ gdt:
|
|||
.word 0, 0
|
||||
.byte 0, 0, 0, 0
|
||||
|
||||
/* code segment */
|
||||
/* -- code segment --
|
||||
* base = 0x00000000, limit = 0xFFFFF (4 KiB Granularity), present
|
||||
* type = 32bit code execute/read, DPL = 0
|
||||
*/
|
||||
.word 0xFFFF, 0
|
||||
.byte 0, 0x9A, 0xCF, 0
|
||||
|
||||
/* data segment */
|
||||
/* -- data segment --
|
||||
* base = 0x00000000, limit 0xFFFFF (4 KiB Granularity), present
|
||||
* type = 32 bit data read/write, DPL = 0
|
||||
*/
|
||||
.word 0xFFFF, 0
|
||||
.byte 0, 0x92, 0xCF, 0
|
||||
|
||||
/* 16 bit real mode CS */
|
||||
/* -- 16 bit real mode CS --
|
||||
* base = 0x00000000, limit 0x0FFFF (1 B Granularity), present
|
||||
* type = 16 bit code execute/read only/conforming, DPL = 0
|
||||
*/
|
||||
.word 0xFFFF, 0
|
||||
.byte 0, 0x9E, 0, 0
|
||||
|
||||
/* 16 bit real mode DS */
|
||||
/* -- 16 bit real mode DS --
|
||||
* base = 0x00000000, limit 0x0FFFF (1 B Granularity), present
|
||||
* type = 16 bit data read/write, DPL = 0
|
||||
*/
|
||||
.word 0xFFFF, 0
|
||||
.byte 0, 0x92, 0, 0
|
||||
|
||||
|
|
@ -1684,3 +1696,415 @@ FUNCTION(grub_vga_get_font)
|
|||
popl %ebx
|
||||
popl %ebp
|
||||
ret
|
||||
|
||||
/*
|
||||
* grub_vbe_status_t grub_vbe_get_controller_info (struct grub_vbe_info_block *controller_info)
|
||||
*
|
||||
* Register allocations for parameters:
|
||||
* %eax *controller_info
|
||||
*/
|
||||
FUNCTION(grub_vbe_get_controller_info)
|
||||
pushl %ebp
|
||||
pushl %edi
|
||||
|
||||
movw %ax, %di /* Store *controller_info to %edx:%di. */
|
||||
xorw %ax, %ax
|
||||
shrl $4, %eax
|
||||
mov %eax, %edx /* prot_to_real destroys %eax. */
|
||||
|
||||
call prot_to_real
|
||||
.code16
|
||||
|
||||
pushw %es
|
||||
|
||||
movw %dx, %es /* *controller_info is now on %es:%di. */
|
||||
movw $0x4f00, %ax
|
||||
int $0x10
|
||||
|
||||
movw %ax, %dx /* real_to_prot destroys %eax. */
|
||||
|
||||
popw %es
|
||||
|
||||
DATA32 call real_to_prot
|
||||
.code32
|
||||
|
||||
movl %edx, %eax
|
||||
andl $0x0FFFF, %eax /* Return value in %eax. */
|
||||
|
||||
popl %edi
|
||||
popl %ebp
|
||||
ret
|
||||
|
||||
/*
|
||||
* grub_vbe_status_t grub_vbe_get_mode_info (grub_uint32_t mode,
|
||||
* struct grub_vbe_mode_info_block *mode_info)
|
||||
*
|
||||
* Register allocations for parameters:
|
||||
* %eax mode
|
||||
* %edx *mode_info
|
||||
*/
|
||||
FUNCTION(grub_vbe_get_mode_info)
|
||||
pushl %ebp
|
||||
pushl %edi
|
||||
|
||||
movl %eax, %ecx /* Store mode number to %ecx. */
|
||||
|
||||
movw %dx, %di /* Store *mode_info to %edx:%di. */
|
||||
xorw %dx, %dx
|
||||
shrl $4, %edx
|
||||
|
||||
call prot_to_real
|
||||
.code16
|
||||
|
||||
pushw %es
|
||||
|
||||
movw %dx, %es /* *mode_info is now on %es:%di. */
|
||||
movw $0x4f01, %ax
|
||||
int $0x10
|
||||
|
||||
movw %ax, %dx /* real_to_prot destroys %eax. */
|
||||
|
||||
popw %es
|
||||
|
||||
DATA32 call real_to_prot
|
||||
.code32
|
||||
|
||||
movl %edx, %eax
|
||||
andl $0x0FFFF, %eax /* Return value in %eax. */
|
||||
|
||||
popl %edi
|
||||
popl %ebp
|
||||
ret
|
||||
|
||||
/*
|
||||
* grub_vbe_status_t grub_vbe_set_mode (grub_uint32_t mode,
|
||||
* struct grub_vbe_crtc_info_block *crtc_info)
|
||||
*
|
||||
* Register allocations for parameters:
|
||||
* %eax mode
|
||||
* %edx *crtc_info
|
||||
*/
|
||||
FUNCTION(grub_vbe_set_mode)
|
||||
pushl %ebp
|
||||
pushl %ebx
|
||||
|
||||
movl %eax, %ebx /* Store mode in %ebx. */
|
||||
|
||||
movw %dx, %di /* Store *crtc_info to %edx:%di. */
|
||||
xorw %dx, %dx
|
||||
shrl $4, %edx
|
||||
|
||||
call prot_to_real
|
||||
.code16
|
||||
|
||||
pushw %es
|
||||
|
||||
movw %dx, %es /* *crtc_info is now on %es:%di. */
|
||||
|
||||
movw $0x4f02, %ax
|
||||
int $0x10
|
||||
|
||||
movw %ax, %dx /* real_to_prot destroys %eax. */
|
||||
|
||||
popw %es
|
||||
|
||||
DATA32 call real_to_prot
|
||||
.code32
|
||||
|
||||
movw %dx, %ax
|
||||
andl $0xFFFF, %eax /* Return value in %eax. */
|
||||
|
||||
popl %ebx
|
||||
popl %ebp
|
||||
ret
|
||||
|
||||
/*
|
||||
* grub_vbe_status_t grub_vbe_get_mode (grub_uint32_t *mode)
|
||||
*
|
||||
* Register allocations for parameters:
|
||||
* %eax *mode
|
||||
*/
|
||||
FUNCTION(grub_vbe_get_mode)
|
||||
pushl %ebp
|
||||
pushl %ebx
|
||||
pushl %eax /* Push *mode to stack. */
|
||||
|
||||
call prot_to_real
|
||||
.code16
|
||||
|
||||
movw $0x4f03, %ax
|
||||
int $0x10
|
||||
|
||||
movw %ax, %dx /* real_to_prot destroys %eax. */
|
||||
|
||||
DATA32 call real_to_prot
|
||||
.code32
|
||||
|
||||
popl %edi /* Pops *mode from stack to %edi. */
|
||||
andl $0xFFFF, %ebx
|
||||
movl %ebx, (%edi)
|
||||
|
||||
movw %dx, %ax
|
||||
andl $0xFFFF, %eax /* Return value in %eax. */
|
||||
|
||||
popl %ebx
|
||||
popl %ebp
|
||||
ret
|
||||
|
||||
/*
|
||||
* grub_vbe_status_t grub_vbe_set_memory_window (grub_uint32_t window,
|
||||
* grub_uint32_t position);
|
||||
*
|
||||
* Register allocations for parameters:
|
||||
* %eax window
|
||||
* %edx position
|
||||
*/
|
||||
FUNCTION(grub_vbe_set_memory_window)
|
||||
pushl %ebp
|
||||
pushl %ebx
|
||||
|
||||
movl %eax, %ebx
|
||||
|
||||
call prot_to_real
|
||||
.code16
|
||||
|
||||
movw $0x4f05, %ax
|
||||
andw $0x00ff, %bx /* BL = window, BH = 0, Set memory window. */
|
||||
int $0x10
|
||||
|
||||
movw %ax, %dx /* real_to_prot destroys %eax. */
|
||||
|
||||
DATA32 call real_to_prot
|
||||
.code32
|
||||
|
||||
movw %dx, %ax
|
||||
andl $0xFFFF, %eax /* Return value in %eax. */
|
||||
|
||||
popl %ebx
|
||||
popl %ebp
|
||||
ret
|
||||
|
||||
/*
|
||||
* grub_vbe_status_t grub_vbe_get_memory_window (grub_uint32_t window,
|
||||
* grub_uint32_t *position);
|
||||
*
|
||||
* Register allocations for parameters:
|
||||
* %eax window
|
||||
* %edx *position
|
||||
*/
|
||||
FUNCTION(grub_vbe_get_memory_window)
|
||||
pushl %ebp
|
||||
pushl %ebx
|
||||
pushl %edx /* Push *position to stack. */
|
||||
|
||||
movl %eax, %ebx /* Store window in %ebx. */
|
||||
|
||||
call prot_to_real
|
||||
.code16
|
||||
|
||||
movw $0x4f05, %ax
|
||||
andw $0x00ff, %bx /* BL = window. */
|
||||
orw $0x0100, %bx /* BH = 1, Get memory window. */
|
||||
int $0x10
|
||||
|
||||
movw %ax, %bx /* real_to_prot destroys %eax. */
|
||||
|
||||
DATA32 call real_to_prot
|
||||
.code32
|
||||
|
||||
popl %edi /* pops *position from stack to %edi. */
|
||||
andl $0xFFFF, %edx
|
||||
movl %edx, (%edi) /* Return position to caller. */
|
||||
|
||||
movw %bx, %ax
|
||||
andl $0xFFFF, %eax /* Return value in %eax. */
|
||||
|
||||
popl %ebx
|
||||
popl %ebp
|
||||
ret
|
||||
|
||||
/*
|
||||
* grub_vbe_status_t grub_vbe_set_scanline_length (grub_uint32_t length)
|
||||
*
|
||||
* Register allocations for parameters:
|
||||
* %eax length
|
||||
*/
|
||||
FUNCTION(grub_vbe_set_scanline_length)
|
||||
pushl %ebp
|
||||
pushl %ebx
|
||||
|
||||
movl %eax, %ecx /* Store length in %ecx. */
|
||||
|
||||
call prot_to_real
|
||||
.code16
|
||||
|
||||
movw $0x4f06, %ax
|
||||
movw $0x0002, %bx /* BL = 2, Set Scan Line in Bytes. */
|
||||
int $0x10
|
||||
|
||||
movw %ax, %dx /* real_to_prot destroys %eax. */
|
||||
|
||||
DATA32 call real_to_prot
|
||||
.code32
|
||||
|
||||
movw %dx, %ax
|
||||
andl $0xFFFF, %eax /* Return value in %eax. */
|
||||
|
||||
popl %ebx
|
||||
popl %ebp
|
||||
ret
|
||||
|
||||
/*
|
||||
* grub_vbe_status_t grub_vbe_get_scanline_length (grub_uint32_t *length)
|
||||
*
|
||||
* Register allocations for parameters:
|
||||
* %eax *length
|
||||
*/
|
||||
FUNCTION(grub_vbe_get_scanline_length)
|
||||
pushl %ebp
|
||||
pushl %ebx
|
||||
pushl %edx /* Push *length to stack. */
|
||||
|
||||
call prot_to_real
|
||||
.code16
|
||||
|
||||
movw $0x4f06, %ax
|
||||
movw $0x0001, %bx /* BL = 1, Get Scan Line Length (in bytes). */
|
||||
int $0x10
|
||||
|
||||
movw %ax, %dx /* real_to_prot destroys %eax. */
|
||||
|
||||
DATA32 call real_to_prot
|
||||
.code32
|
||||
|
||||
popl %edi /* Pops *length from stack to %edi. */
|
||||
andl $0xFFFF, %ebx
|
||||
movl %ebx, (%edi) /* Return length to caller. */
|
||||
|
||||
movw %dx, %ax
|
||||
andl $0xFFFF, %eax /* Return value in %eax. */
|
||||
|
||||
popl %ebx
|
||||
popl %ebp
|
||||
ret
|
||||
|
||||
/*
|
||||
* grub_vbe_status_t grub_vbe_set_display_start (grub_uint32_t x,
|
||||
* grub_uint32_t y)
|
||||
*
|
||||
* Register allocations for parameters:
|
||||
* %eax x
|
||||
* %edx y
|
||||
*/
|
||||
FUNCTION(grub_vbe_set_display_start)
|
||||
pushl %ebp
|
||||
pushl %ebx
|
||||
|
||||
movl %eax, %ecx /* Store x in %ecx. */
|
||||
|
||||
call prot_to_real
|
||||
.code16
|
||||
|
||||
movw $0x4f07, %ax
|
||||
movw $0x0080, %bx /* BL = 80h, Set Display Start
|
||||
during Vertical Retrace. */
|
||||
int $0x10
|
||||
|
||||
movw %ax, %dx /* real_to_prot destroys %eax. */
|
||||
|
||||
DATA32 call real_to_prot
|
||||
.code32
|
||||
|
||||
movw %dx, %ax
|
||||
andl $0xFFFF, %eax /* Return value in %eax. */
|
||||
|
||||
popl %ebx
|
||||
popl %ebp
|
||||
ret
|
||||
|
||||
/*
|
||||
* grub_vbe_status_t grub_vbe_get_display_start (grub_uint32_t *x,
|
||||
* grub_uint32_t *y)
|
||||
*
|
||||
* Register allocations for parameters:
|
||||
* %eax *x
|
||||
* %edx *y
|
||||
*/
|
||||
FUNCTION(grub_vbe_get_display_start)
|
||||
pushl %ebp
|
||||
pushl %ebx
|
||||
pushl %eax /* Push *x to stack. */
|
||||
pushl %edx /* Push *y to stack. */
|
||||
|
||||
call prot_to_real
|
||||
.code16
|
||||
|
||||
movw $0x4f07, %ax
|
||||
movw $0x0001, %bx /* BL = 1, Get Display Start. */
|
||||
int $0x10
|
||||
|
||||
movw %ax, %bx /* real_to_prot destroys %eax. */
|
||||
|
||||
DATA32 call real_to_prot
|
||||
.code32
|
||||
|
||||
popl %edi /* Pops *y from stack to %edi. */
|
||||
andl $0xFFFF, %edx
|
||||
movl %edx, (%edi) /* Return y-position to caller. */
|
||||
|
||||
popl %edi /* Pops *x from stack to %edi. */
|
||||
andl $0xFFFF, %ecx
|
||||
movl %ecx, (%edi) /* Return x-position to caller. */
|
||||
|
||||
movw %bx, %ax
|
||||
andl $0xFFFF, %eax /* Return value in %eax. */
|
||||
|
||||
popl %ebx
|
||||
popl %ebp
|
||||
ret
|
||||
|
||||
/*
|
||||
* grub_vbe_status_t grub_vbe_set_palette_data (grub_uint32_t color_count,
|
||||
* grub_uint32_t start_index,
|
||||
* struct grub_vbe_palette_data *palette_data)
|
||||
*
|
||||
* Register allocations for parameters:
|
||||
* %eax color_count
|
||||
* %edx start_index
|
||||
* %ecx *palette_data
|
||||
*/
|
||||
FUNCTION(grub_vbe_set_palette_data)
|
||||
pushl %ebp
|
||||
pushl %ebx
|
||||
|
||||
movl %eax, %ebx /* Store color_count in %ebx. */
|
||||
|
||||
movw %cx, %di /* Store *palette_data to %ecx:%di. */
|
||||
xorw %cx, %cx
|
||||
shrl $4, %ecx
|
||||
|
||||
call prot_to_real
|
||||
.code16
|
||||
|
||||
pushw %es
|
||||
|
||||
movw %cx, %es /* *palette_data is now on %es:%di. */
|
||||
movw %bx, %cx /* color_count is now on %cx. */
|
||||
|
||||
movw $0x4f09, %ax
|
||||
xorw %bx, %bx /* BL = 0, Set Palette Data. */
|
||||
int $0x10
|
||||
|
||||
movw %ax, %dx /* real_to_prot destroys %eax. */
|
||||
|
||||
popw %es
|
||||
|
||||
DATA32 call real_to_prot
|
||||
.code32
|
||||
|
||||
movw %dx, %ax
|
||||
andl $0xFFFF, %eax /* Return value in %eax. */
|
||||
|
||||
popl %ebx
|
||||
popl %ebp
|
||||
ret
|
||||
|
|
|
|||
Loading…
Reference in a new issue