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