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Rev 1941 Rev 1952
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;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;;
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;; Copyright (C) KolibriOS team 2004-2008. 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: 1941 $
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$Revision: 1952 $
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MEM_WB	   equ 6	       ;write-back memory
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MEM_WB	   equ 6	       ;write-back memory
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MEM_WC	   equ 1	       ;write combined memory
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MEM_WC	   equ 1	       ;write combined memory
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MEM_UC	   equ 0	       ;uncached memory
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MEM_UC	   equ 0	       ;uncached memory
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; ======================================================================
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; ======================================================================
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align 4
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align 4
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preinit_mem:
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preinit_mem:
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; clear [0x280000..HEAP_BASE]
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; clear [CLEAN_ZONE..HEAP_BASE]
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	   mov ebx, cr4
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	   mov ebx, cr4
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	   or  ebx, CR4_PSE
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	   or  ebx, CR4_PSE
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	   mov eax, PG_LARGE+PG_SW
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	   mov eax, PG_LARGE+PG_SW
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	   mov cr4, ebx
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	   mov cr4, ebx
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	   dec [pg_data.kernel_tables-OS_BASE]
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	   dec [pg_data.kernel_tables-OS_BASE]
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	   sub [pg_data.kernel_pages -OS_BASE], 1024	; 1 large page = 1024 ordinary pages
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	   mov [edx], eax				; map first (physical) 4M bytes
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	   mov [edx], eax				; map first (physical) 4M bytes
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	   add edx, 4
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	   add edx, 4
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	   mov edi, [tmp_page_tabs]
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	   mov ecx, [pg_data.kernel_pages -OS_BASE]	; map the rest of kernel space
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	   mov eax, 0x00400000+PG_SW
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.map_kernel_pages:
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	   mov edi, [tmp_page_tabs]
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	   stosd
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	   mov ecx, [pg_data.kernel_pages -OS_BASE]	; safety cleaning of already-zeroed space
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	   add	eax, 4096
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	   dec	ecx
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	   xor eax, eax
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	   jnz	.map_kernel_pages
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	   rep stosd
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	   mov ecx, [pg_data.kernel_tables-OS_BASE]	; build some PDEs to hold empty PTEs
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	   mov ecx, [pg_data.kernel_tables-OS_BASE]	; build some PDEs to hold empty PTEs
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	   mov eax, [tmp_page_tabs]
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	   mov eax, [tmp_page_tabs]
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	   or  eax, PG_SW
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	   or  eax, PG_SW
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	   mov edi, edx 		; edi = sys_pgdir+0x804
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	   mov edi, edx 		; edi = sys_pgdir+0x804
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.map_kernel_tabs:
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.map_kernel_tabs:
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	   stosd
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	   stosd