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;; Copyright (C) KolibriOS team 2004-2009. All rights reserved. ;;
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;; Copyright (C) KolibriOS team 2004-2009. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License    ;;
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;; Distributed under terms of the GNU General Public License    ;;
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;;                                                              ;;
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;;                                                              ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision: 1496 $
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$Revision: 1507 $
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           shr edi, 12
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           shr edi, 12
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           mov [pg_count], edi
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           mov [pg_count], edi
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           shr edi, 10
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           bt [cpu_caps], CAPS_PSE
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           shr edi, 10
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           jnc .map_page_tables
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           or esi, PG_LARGE+PG_UW
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           or esi,  PG_GLOBAL+PG_LARGE+PG_UW
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           mov edx, sys_pgdir+(LFB_BASE shr 20)
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           mov edx, sys_pgdir+(LFB_BASE shr 20)
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@@:
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@@:
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           mov [edx], esi
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           mov [edx], esi
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           add edx, 4
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           add edx, 4
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           add esi, 0x00400000
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           add esi, 0x00400000
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           dec edi
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           jnz @B
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           bt [cpu_caps], CAPS_PGE
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           jnc @F
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           dec edi
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           or dword [sys_pgdir+(LFB_BASE shr 20)], PG_GLOBAL
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           jnz @B
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@@:
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           mov dword [LFBAddress], LFB_BASE
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           mov dword [LFBAddress], LFB_BASE
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           mov eax, cr3       ;flush TLB
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           mov eax, cr3       ;flush TLB
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           mov cr3, eax
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           ret
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           mov cr3, eax
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           ret
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.map_page_tables:
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endp
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align 4
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proc init_userDMA
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           call alloc_page
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           stdcall alloc_pages, 4096 	; 16M <<<<<<<<<<+++++++++++++++++++++++++++++++++
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           stdcall map_page_table, edx, eax
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           add edx, 0x00400000
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           add eax, 0x007FFFF0
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           dec edi
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	   and eax, 0xFF800000		; align at 8M boundary
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           jnz @B
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	   mov [UserDMAaddr], eax
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           or  eax, PG_UW + PG_NOCACHE
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           mov eax, [LFBAddress]
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           mov edi, page_tabs + (LFB_BASE shr 10)
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           or eax, PG_UW
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           mov ebx, USER_DMA_BUFFER
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           mov ecx, [pg_count]
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	   mov ecx, 2048		; 8M, to be sure
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           cld
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           call commit_pages
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           mov eax, [UserDMAaddr]
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           stosd
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           add eax, 0x1000
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           dec ecx
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           or  eax, PG_LARGE + PG_UW + PG_NOCACHE
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           jnz @B
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           mov ebx, sys_pgdir + (USER_DMA_BUFFER shr 20)
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           mov dword [LFBAddress], LFB_BASE
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           mov [ebx], eax
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           mov eax, cr3       ;flush TLB
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	   add ebx, 4
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           mov cr3, eax
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           add eax, 0x00400000
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           mov [ebx], eax