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
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@ -1,6 +1,6 @@
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 1999,2000,2001,2002,2003 Free Software Foundation, Inc.
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* Copyright (C) 1999,2000,2001,2002,2003,2005 Free Software Foundation, Inc.
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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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@ -219,11 +219,11 @@ VARIABLE(grub_apm_bios_info)
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* 31 24 19 16 7 0
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* ------------------------------------------------------------
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* | | |B| |A| | | |1|0|E|W|A| |
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* | BASE 31..24 |G|/|0|V| LIMIT |P|DPL| TYPE | BASE 23:16 |
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* | BASE 31..24 |G|/|L|V| LIMIT |P|DPL| TYPE | BASE 23:16 | 4
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* | | |D| |L| 19..16| | |1|1|C|R|A| |
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* ------------------------------------------------------------
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* | | |
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* | BASE 15..0 | LIMIT 15..0 |
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* | BASE 15..0 | LIMIT 15..0 | 0
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* | | |
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* ------------------------------------------------------------
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*
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@ -236,19 +236,31 @@ gdt:
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.word 0, 0
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.byte 0, 0, 0, 0
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/* code segment */
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/* -- code segment --
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* base = 0x00000000, limit = 0xFFFFF (4 KiB Granularity), present
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* type = 32bit code execute/read, DPL = 0
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*/
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.word 0xFFFF, 0
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.byte 0, 0x9A, 0xCF, 0
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/* data segment */
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/* -- data segment --
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* base = 0x00000000, limit 0xFFFFF (4 KiB Granularity), present
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* type = 32 bit data read/write, DPL = 0
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*/
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.word 0xFFFF, 0
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.byte 0, 0x92, 0xCF, 0
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/* 16 bit real mode CS */
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/* -- 16 bit real mode CS --
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* base = 0x00000000, limit 0x0FFFF (1 B Granularity), present
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* type = 16 bit code execute/read only/conforming, DPL = 0
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*/
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.word 0xFFFF, 0
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.byte 0, 0x9E, 0, 0
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/* 16 bit real mode DS */
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/* -- 16 bit real mode DS --
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* base = 0x00000000, limit 0x0FFFF (1 B Granularity), present
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* type = 16 bit data read/write, DPL = 0
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*/
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.word 0xFFFF, 0
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.byte 0, 0x92, 0, 0
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@ -1684,3 +1696,415 @@ FUNCTION(grub_vga_get_font)
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popl %ebx
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popl %ebp
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ret
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/*
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* grub_vbe_status_t grub_vbe_get_controller_info (struct grub_vbe_info_block *controller_info)
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*
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* Register allocations for parameters:
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* %eax *controller_info
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*/
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FUNCTION(grub_vbe_get_controller_info)
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pushl %ebp
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pushl %edi
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movw %ax, %di /* Store *controller_info to %edx:%di. */
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xorw %ax, %ax
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shrl $4, %eax
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mov %eax, %edx /* prot_to_real destroys %eax. */
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call prot_to_real
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.code16
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pushw %es
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movw %dx, %es /* *controller_info is now on %es:%di. */
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movw $0x4f00, %ax
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int $0x10
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movw %ax, %dx /* real_to_prot destroys %eax. */
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popw %es
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DATA32 call real_to_prot
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.code32
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movl %edx, %eax
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andl $0x0FFFF, %eax /* Return value in %eax. */
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popl %edi
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popl %ebp
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ret
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/*
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* grub_vbe_status_t grub_vbe_get_mode_info (grub_uint32_t mode,
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* struct grub_vbe_mode_info_block *mode_info)
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*
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* Register allocations for parameters:
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* %eax mode
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* %edx *mode_info
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*/
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FUNCTION(grub_vbe_get_mode_info)
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pushl %ebp
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pushl %edi
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movl %eax, %ecx /* Store mode number to %ecx. */
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movw %dx, %di /* Store *mode_info to %edx:%di. */
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xorw %dx, %dx
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shrl $4, %edx
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call prot_to_real
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.code16
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pushw %es
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movw %dx, %es /* *mode_info is now on %es:%di. */
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movw $0x4f01, %ax
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int $0x10
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movw %ax, %dx /* real_to_prot destroys %eax. */
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popw %es
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DATA32 call real_to_prot
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.code32
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movl %edx, %eax
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andl $0x0FFFF, %eax /* Return value in %eax. */
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popl %edi
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popl %ebp
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ret
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/*
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* grub_vbe_status_t grub_vbe_set_mode (grub_uint32_t mode,
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* struct grub_vbe_crtc_info_block *crtc_info)
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*
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* Register allocations for parameters:
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* %eax mode
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* %edx *crtc_info
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*/
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FUNCTION(grub_vbe_set_mode)
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pushl %ebp
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pushl %ebx
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movl %eax, %ebx /* Store mode in %ebx. */
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movw %dx, %di /* Store *crtc_info to %edx:%di. */
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xorw %dx, %dx
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shrl $4, %edx
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call prot_to_real
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.code16
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pushw %es
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movw %dx, %es /* *crtc_info is now on %es:%di. */
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movw $0x4f02, %ax
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int $0x10
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movw %ax, %dx /* real_to_prot destroys %eax. */
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popw %es
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DATA32 call real_to_prot
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.code32
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movw %dx, %ax
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andl $0xFFFF, %eax /* Return value in %eax. */
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popl %ebx
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popl %ebp
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ret
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/*
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* grub_vbe_status_t grub_vbe_get_mode (grub_uint32_t *mode)
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*
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* Register allocations for parameters:
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* %eax *mode
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*/
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FUNCTION(grub_vbe_get_mode)
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pushl %ebp
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pushl %ebx
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pushl %eax /* Push *mode to stack. */
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call prot_to_real
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.code16
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movw $0x4f03, %ax
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int $0x10
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movw %ax, %dx /* real_to_prot destroys %eax. */
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DATA32 call real_to_prot
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.code32
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popl %edi /* Pops *mode from stack to %edi. */
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andl $0xFFFF, %ebx
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movl %ebx, (%edi)
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movw %dx, %ax
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andl $0xFFFF, %eax /* Return value in %eax. */
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popl %ebx
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popl %ebp
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ret
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/*
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* grub_vbe_status_t grub_vbe_set_memory_window (grub_uint32_t window,
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* grub_uint32_t position);
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*
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* Register allocations for parameters:
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* %eax window
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* %edx position
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*/
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FUNCTION(grub_vbe_set_memory_window)
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pushl %ebp
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pushl %ebx
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movl %eax, %ebx
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call prot_to_real
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.code16
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movw $0x4f05, %ax
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andw $0x00ff, %bx /* BL = window, BH = 0, Set memory window. */
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int $0x10
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movw %ax, %dx /* real_to_prot destroys %eax. */
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DATA32 call real_to_prot
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.code32
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movw %dx, %ax
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andl $0xFFFF, %eax /* Return value in %eax. */
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popl %ebx
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popl %ebp
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ret
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/*
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* grub_vbe_status_t grub_vbe_get_memory_window (grub_uint32_t window,
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* grub_uint32_t *position);
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*
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* Register allocations for parameters:
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* %eax window
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* %edx *position
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*/
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FUNCTION(grub_vbe_get_memory_window)
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pushl %ebp
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pushl %ebx
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pushl %edx /* Push *position to stack. */
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movl %eax, %ebx /* Store window in %ebx. */
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call prot_to_real
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.code16
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movw $0x4f05, %ax
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andw $0x00ff, %bx /* BL = window. */
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orw $0x0100, %bx /* BH = 1, Get memory window. */
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int $0x10
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movw %ax, %bx /* real_to_prot destroys %eax. */
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DATA32 call real_to_prot
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.code32
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popl %edi /* pops *position from stack to %edi. */
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andl $0xFFFF, %edx
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movl %edx, (%edi) /* Return position to caller. */
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movw %bx, %ax
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andl $0xFFFF, %eax /* Return value in %eax. */
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popl %ebx
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popl %ebp
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ret
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/*
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* grub_vbe_status_t grub_vbe_set_scanline_length (grub_uint32_t length)
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*
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* Register allocations for parameters:
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* %eax length
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*/
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FUNCTION(grub_vbe_set_scanline_length)
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pushl %ebp
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pushl %ebx
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movl %eax, %ecx /* Store length in %ecx. */
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call prot_to_real
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.code16
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movw $0x4f06, %ax
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movw $0x0002, %bx /* BL = 2, Set Scan Line in Bytes. */
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int $0x10
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movw %ax, %dx /* real_to_prot destroys %eax. */
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DATA32 call real_to_prot
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.code32
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movw %dx, %ax
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andl $0xFFFF, %eax /* Return value in %eax. */
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popl %ebx
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popl %ebp
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ret
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/*
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* grub_vbe_status_t grub_vbe_get_scanline_length (grub_uint32_t *length)
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*
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* Register allocations for parameters:
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* %eax *length
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*/
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FUNCTION(grub_vbe_get_scanline_length)
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pushl %ebp
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pushl %ebx
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pushl %edx /* Push *length to stack. */
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call prot_to_real
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.code16
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movw $0x4f06, %ax
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movw $0x0001, %bx /* BL = 1, Get Scan Line Length (in bytes). */
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int $0x10
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movw %ax, %dx /* real_to_prot destroys %eax. */
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DATA32 call real_to_prot
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.code32
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popl %edi /* Pops *length from stack to %edi. */
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andl $0xFFFF, %ebx
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movl %ebx, (%edi) /* Return length to caller. */
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movw %dx, %ax
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andl $0xFFFF, %eax /* Return value in %eax. */
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popl %ebx
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popl %ebp
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ret
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/*
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* grub_vbe_status_t grub_vbe_set_display_start (grub_uint32_t x,
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* grub_uint32_t y)
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*
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* Register allocations for parameters:
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* %eax x
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* %edx y
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*/
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FUNCTION(grub_vbe_set_display_start)
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pushl %ebp
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pushl %ebx
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movl %eax, %ecx /* Store x in %ecx. */
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call prot_to_real
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.code16
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movw $0x4f07, %ax
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movw $0x0080, %bx /* BL = 80h, Set Display Start
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during Vertical Retrace. */
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int $0x10
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movw %ax, %dx /* real_to_prot destroys %eax. */
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DATA32 call real_to_prot
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.code32
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movw %dx, %ax
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andl $0xFFFF, %eax /* Return value in %eax. */
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popl %ebx
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popl %ebp
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ret
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/*
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* grub_vbe_status_t grub_vbe_get_display_start (grub_uint32_t *x,
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* grub_uint32_t *y)
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*
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* Register allocations for parameters:
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* %eax *x
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* %edx *y
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*/
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FUNCTION(grub_vbe_get_display_start)
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pushl %ebp
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pushl %ebx
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pushl %eax /* Push *x to stack. */
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pushl %edx /* Push *y to stack. */
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call prot_to_real
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.code16
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movw $0x4f07, %ax
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movw $0x0001, %bx /* BL = 1, Get Display Start. */
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int $0x10
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movw %ax, %bx /* real_to_prot destroys %eax. */
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DATA32 call real_to_prot
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.code32
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popl %edi /* Pops *y from stack to %edi. */
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andl $0xFFFF, %edx
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movl %edx, (%edi) /* Return y-position to caller. */
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popl %edi /* Pops *x from stack to %edi. */
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andl $0xFFFF, %ecx
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movl %ecx, (%edi) /* Return x-position to caller. */
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movw %bx, %ax
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andl $0xFFFF, %eax /* Return value in %eax. */
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popl %ebx
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popl %ebp
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ret
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/*
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* grub_vbe_status_t grub_vbe_set_palette_data (grub_uint32_t color_count,
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* grub_uint32_t start_index,
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* struct grub_vbe_palette_data *palette_data)
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*
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* Register allocations for parameters:
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* %eax color_count
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* %edx start_index
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* %ecx *palette_data
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*/
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FUNCTION(grub_vbe_set_palette_data)
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pushl %ebp
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pushl %ebx
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movl %eax, %ebx /* Store color_count in %ebx. */
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movw %cx, %di /* Store *palette_data to %ecx:%di. */
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xorw %cx, %cx
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shrl $4, %ecx
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call prot_to_real
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.code16
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pushw %es
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movw %cx, %es /* *palette_data is now on %es:%di. */
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movw %bx, %cx /* color_count is now on %cx. */
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movw $0x4f09, %ax
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xorw %bx, %bx /* BL = 0, Set Palette Data. */
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int $0x10
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movw %ax, %dx /* real_to_prot destroys %eax. */
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popw %es
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DATA32 call real_to_prot
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.code32
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movw %dx, %ax
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andl $0xFFFF, %eax /* Return value in %eax. */
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popl %ebx
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popl %ebp
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ret
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