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           bt [cpu_caps], CAPS_PSE
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           bt [cpu_caps], CAPS_PSE
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           jnc .map_page_tables
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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_LARGE+PG_UW
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           shr edx, 20
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           mov ecx, edx
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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 [sys_pgdir+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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           dec edi
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           jnz @B
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           jnz @B
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           bt [cpu_caps], CAPS_PGE
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           bt [cpu_caps], CAPS_PGE
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           jnc @F
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           jnc @F
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           or dword [sys_pgdir+ecx], PG_GLOBAL
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           or dword [sys_pgdir+(LFB_BASE shr 20)], PG_GLOBAL
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@@:
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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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           mov cr3, eax