;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2016. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; Synhronization for MenuetOS. ;;
;; Author: Halyavin Andrey, halyavin@land.ru ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision: 8224 $
struct FRB
list LHEAD
magic rd 1
handle rd 1
destroy rd 1
width rd 1
height rd 1
pitch rd 1
format rd 1
private rd 1
pde rd 8
ends
align 4
create_framebuffer:
mov ecx, sizeof.FRB
call create_object
test eax, eax
jz .fail
mov [eax+FRB.magic], 'FRMB'
mov [eax+FRB.destroy], 0
.fail:
ret
align 4
init_video:
mov ebp, bios_fb
movzx eax, byte [BOOT.bpp] ; bpp
mov [_display.bits_per_pixel], eax
mov [_display.vrefresh], 60
movzx eax, word [BOOT.x_res]; X max
cmp eax, MAX_SCREEN_WIDTH
ja $
mov [_display.width], eax
mov [ebp+FRB.width], eax
mov [display_width_standard], eax
dec eax
mov [screen_workarea.right], eax
movzx eax, word [BOOT.y_res]; Y max
cmp eax, MAX_SCREEN_HEIGHT
ja $
mov [_display.height], eax
mov [ebp+FRB.height], eax
mov [display_height_standard], eax
dec eax
mov [screen_workarea.bottom], eax
movzx eax, word [BOOT.vesa_mode] ; screen mode
mov dword [SCR_MODE], eax
mov eax, 640 *4 ; Bytes PerScanLine
cmp [SCR_MODE], word 0x13 ; 320x200
je @f
cmp [SCR_MODE], word 0x12 ; VGA 640x480
je @f
movzx eax, word[BOOT.pitch] ; for other modes
@@:
mov [_display.lfb_pitch], eax
mov [ebp+FRB.pitch], eax
mov eax, [BOOT.lfb]
mov [LFBAddress], eax
mov eax, [_display.width]
mul [_display.height]
mov [_display.win_map_size], eax
cmp word [SCR_MODE], 0x0012 ; VGA (640x480 16 colors)
je .vga
cmp word [SCR_MODE], 0x0013 ; MCGA (320*200 256 colors)
je .32bpp
cmp byte [_display.bits_per_pixel], 32
je .32bpp
cmp byte [_display.bits_per_pixel], 24
je .24bpp
cmp byte [_display.bits_per_pixel], 16
je .16bpp
.vga:
mov [PUTPIXEL], VGA_putpixel
mov [GETPIXEL], Vesa20_getpixel32 ; Conversion buffer is 32 bpp
mov [_display.bytes_per_pixel], 4 ; Conversion buffer is 32 bpp
jmp .finish
.16bpp:
mov [PUTPIXEL], Vesa20_putpixel16
mov [GETPIXEL], Vesa20_getpixel16
mov [_display.bytes_per_pixel], 2
jmp .finish
.24bpp:
mov [PUTPIXEL], Vesa20_putpixel24
mov [GETPIXEL], Vesa20_getpixel24
mov [_display.bytes_per_pixel], 3
jmp .finish
.32bpp:
mov [PUTPIXEL], Vesa20_putpixel32
mov [GETPIXEL], Vesa20_getpixel32
mov [_display.bytes_per_pixel], 4
.finish:
mov [MOUSE_PICTURE], mousepointer
mov [_display.check_mouse], check_mouse_area_for_putpixel
mov [_display.check_m_pixel], check_mouse_area_for_getpixel
mov ax, word [SCR_MODE]
cmp ax, 0x0012
je .fake
cmp ax, 0x0013
je .fake
mov esi, [LFBAddress]
bt [cpu_caps], CAPS_PSE
jnc .create_page_tables
mov edx, 0x00400000
or esi, PG_GLOBAL+PAT_WC+PG_UWR
and esi, [pte_valid_mask]
or esi, PDE_LARGE
mov [ebp+FRB.pde], esi
add esi, edx
mov [ebp+FRB.pde+4], esi
add esi, edx
mov [ebp+FRB.pde+8], esi
add esi, edx
mov [ebp+FRB.pde+12], esi
add esi, edx
.ok:
call calculate_fast_getting_offset_for_WinMapAddress
; for Qemu or non standart video cards
; Unfortunately [BytesPerScanLine] does not always
; equal to [_display.width] * [ScreenBPP] / 8
call calculate_fast_getting_offset_for_LFB
ret
.create_page_tables:
add ebp, FRB.pde
or esi, PG_GLOBAL+PAT_WC+PG_UWR
and esi, [pte_valid_mask]
stdcall alloc_kernel_space, 0x1000
mov edi, eax
mov ebx, 4
.new_pd:
call alloc_page
lea edx, [eax+PG_UWR]
mov [ebp], edx
stdcall map_page, edi, eax, PG_SWR
mov eax, esi
mov ecx, 1024
@@:
stosd
add eax, 0x1000
loop @B
add esi, 0x400000
add ebp, 4
sub edi, 4096
dec ebx
jnz .new_pd
stdcall free_kernel_space, edi
jmp .ok
.fake:
mov [BOOT.mtrr], byte 2
stdcall alloc_kernel_space, 0x1000
push eax ;store in stack for subsequent
mov edi, eax ;free_kernel_space call
call alloc_page
lea edx, [eax+PG_UWR]
mov [ebp+FRB.pde], edx
stdcall map_page, edi, eax, PG_SWR
; max VGA=640*480*4=1228800 bytes
; + 32*640*4=81920 bytes for mouse pointer
stdcall alloc_pages, ((1228800+81920)/4096)
or eax, PG_GLOBAL+PG_UWR
and eax, [pte_valid_mask]
mov ecx, (1228800+81920)/4096
@@:
stosd
add eax, 0x1000
loop @B
call free_kernel_space
jmp .ok
align 4
set_framebuffer:
push esi
push edi
lea esi, [ecx+FRB.pde]
mov eax, sys_proc
cld
pushfd
cli
mov [_display.current_lfb], ecx
.patch_pde:
lea edi, [eax+PROC.pdt_0+4096-32] ;last 8 pd entries up to 32Mb framebuffer
mov ecx, 4
rep movsd ;patch pde
sub esi, 16
mov eax, [eax+PROC.list.next] ;next process/address space
cmp eax, sys_proc
jne .patch_pde
bt [cpu_caps], CAPS_PGE
jnc .cr3_flush
mov eax, cr4
btr eax, 7 ;clear cr4.PGE
mov cr4, eax ;flush TLB
bts eax, 7
mov cr4, eax ;flush TLB
.exit:
popfd
pop edi
pop esi
ret
.cr3_flush:
mov eax, cr3
mov cr3, eax ;flush TLB
jmp .exit