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6263 serge 1
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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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: 6240 $
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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_VARS+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_VARS+BOOT_X_RES]; X max
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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_VARS+BOOT_Y_RES]; Y max
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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_VARS+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_VARS+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_VARS+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
6275 serge 130
        or      esi, PG_GLOBAL+PAT_WC+PG_UWR
6263 serge 131
        and     esi, [pte_valid_mask]
6275 serge 132
        or      esi, PDE_LARGE
6263 serge 133
        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:
182
        mov     [BOOT_VARS+BOOT_MTRR], byte 2
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184
        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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188
        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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@@:
201
        stosd
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        add     eax, 0x1000
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        loop    @B
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205
        call    free_kernel_space
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        jmp     .ok
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208
align 4
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set_framebuffer:
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        push    esi
211
        push    edi
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        lea     esi, [ecx+FRB.pde]
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        mov     eax, sys_proc
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215
        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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228
        bt      [cpu_caps], CAPS_PGE
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        jnc     .cr3_flush
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231
        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:
237
        popfd
238
        pop     edi
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        pop     esi
240
        ret
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242
.cr3_flush:
243
        mov     eax, cr3
244
        mov     cr3, eax                        ;flush TLB
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        jmp     .exit
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