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Rev 465 Rev 513
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$Revision: 465 $
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$Revision: 513 $
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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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           mov edx, eax
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           mov edx, eax
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           mov [pg_data.pages_count-OS_BASE], eax
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           mov [pg_data.pages_count-OS_BASE], eax
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           shr eax, 3
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           shr eax, 3
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           mov [pg_data.pagemap_size-OS_BASE], eax
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           mov [pg_data.pagemap_size-OS_BASE], eax
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           add eax, (sys_pgmap-OS_BASE)+4095
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           and eax, not 4095
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           mov [tmp_page_tabs], eax
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           cmp edx, (OS_BASE/4096)
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           cmp edx, (OS_BASE/4096)
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           jbe @F
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           jbe @F
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           mov edx, (OS_BASE/4096)
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           mov edx, (OS_BASE/4096)
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           jmp .set
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           jmp .set
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           or eax, PG_GLOBAL
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           or eax, PG_GLOBAL
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           or ebx, CR4_PGE
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           or ebx, CR4_PGE
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@@:
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@@:
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           mov cr4, ebx
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           mov cr4, ebx
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           sub [pg_data.kernel_tables-OS_BASE], 1
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           dec [pg_data.kernel_tables-OS_BASE]
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           mov [edx], eax
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           add eax, 0x00400000
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           mov [edx], eax
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;           mov [edx+4], eax
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           add eax, 0x00400000
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           add edx, 4
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           add edx, 4
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           mov eax, 0x400000+PG_SW
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           mov ecx, [tmp_page_tabs]
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           mov eax, 0x400000+PG_SW
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           sub ecx, 0x400000
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           mov ecx, (tmp_page_tab-0x400000)/4096
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           shr ecx, 12          ;ecx/=4096
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           jmp .map_low
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           jmp .map_low
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.no_PSE:
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.no_PSE:
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           mov eax, PG_SW
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           mov eax, PG_SW
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           mov ecx, [tmp_page_tabs]
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           mov ecx, tmp_page_tab/4096
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           shr ecx, 12
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.map_low:
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.map_low:
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           mov edi, tmp_page_tab
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           mov edi, [tmp_page_tabs]
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@@:                                   ;
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@@:                                   ;
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           stosd
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           stosd
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           shl ecx, 10
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           shl ecx, 10
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           xor eax, eax
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           xor eax, eax
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           rep stosd
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           rep stosd
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           mov ecx, [pg_data.kernel_tables-OS_BASE]
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           mov ecx, [pg_data.kernel_tables-OS_BASE]
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           mov eax, [tmp_page_tabs]
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           mov eax, tmp_page_tab+PG_SW
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           or eax, PG_SW
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           mov edi, edx
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           mov edi, edx
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align 4
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align 4
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proc init_page_map
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proc init_page_map
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           mov edi, sys_pgmap-OS_BASE
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           mov ecx, ((HEAP_BASE-OS_BASE)/4096)/32      ;384/4
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           mov ebx, ecx
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           xor eax,eax
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           cld
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           rep stosd
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           not eax
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           mov ecx, [pg_data.pagemap_size-OS_BASE]
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           mov edi, sys_pgmap-OS_BASE
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           mov ecx, [pg_data.pagemap_size-OS_BASE]
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           shr ecx, 2
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           sub ecx, ebx
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           or eax, -1
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           shr ecx, 2
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           cld
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           rep stosd
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           rep stosd
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           lea edi, [sys_pgmap-OS_BASE+ebx*4]         ;+384
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           mov ecx, [tmp_page_tabs]
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           mov edx, [pg_data.pages_count-OS_BASE]
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           mov ecx, [pg_data.kernel_tables-OS_BASE]
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           mov edx, [pg_data.pages_count-OS_BASE]
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           add ecx, ((HEAP_BASE-OS_BASE)/4096) and 31
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           shr ecx, 12
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           sub edx, (HEAP_BASE-OS_BASE)/4096
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           add ecx, [pg_data.kernel_tables-OS_BASE]
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           sub edx, ecx
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           sub edx, ecx
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           mov [pg_data.pages_free-OS_BASE], edx
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           mov [pg_data.pages_free-OS_BASE], edx
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           mov edi, sys_pgmap-OS_BASE
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           xor eax, eax
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           mov ebx, ecx
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           mov ebx, ecx
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           shr ecx, 5
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           shr ecx, 5
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           xor eax, eax
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           mov ebx, sys_pgmap
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           mov ebx, sys_pgmap
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           add ebx, [pg_data.pagemap_size-OS_BASE]
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           add ebx, [pg_data.pagemap_size-OS_BASE]
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           mov [page_end-OS_BASE], ebx
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           mov [page_end-OS_BASE], ebx
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           mov [pg_data.pg_mutex-OS_BASE], 0
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           mov [pg_data.pg_mutex-OS_BASE], 0
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           ret
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           ret
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endp
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endp
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