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Rev 2288 Rev 2443
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        mov     [acpi_dev_size], ebx
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        mov     [acpi_dev_size], ebx
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        call    IRQ_mask_all
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        call    IRQ_mask_all
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; IOAPIC init
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; IOAPIC init
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        stdcall map_io_mem, [acpi_ioapic_base], 0x20, PG_SW
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        stdcall map_io_mem, [acpi_ioapic_base], 0x20, PG_SW+PG_NOCACHE
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        mov     [IOAPIC_base], eax
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        mov     [IOAPIC_base], eax
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        ret
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        ret
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;===========================================================
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;===========================================================
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align 4
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align 4
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LAPIC_init:
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        ; Check MSR support
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        ;....
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        ; Get LAPIC base address
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; mov ecx, 0x1b
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; rdmsr       ; it may be replaced to
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LAPIC_init:
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        cmp     [LAPIC_BASE], 0
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; and ax, 0xf000    ; mov eax, 0xfee00000
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        jne     .done
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        stdcall map_io_mem, [acpi_lapic_base], 0x1000, PG_SW
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        stdcall map_io_mem, [acpi_lapic_base], 0x1000, PG_SW+PG_NOCACHE
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        mov     [LAPIC_BASE], eax
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        mov     [LAPIC_BASE], eax
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        mov     esi, eax
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        mov     esi, eax
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        shr     eax, 6      ; eax /= 64; APIC ticks per 0.01 sec
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        shr     eax, 6      ; eax /= 64; APIC ticks per 0.01 sec
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        ; Start (every 0.01 sec)
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        ; Start (every 0.01 sec)
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        mov     dword[esi + APIC_LVT_timer], 0x30020; periodic int 0x20
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        mov     dword[esi + APIC_LVT_timer], 0x30020; periodic int 0x20
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        mov     dword[esi + APIC_timer_init], eax
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        mov     dword[esi + APIC_timer_init], eax
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.done:
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        ret
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        ret
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;===========================================================
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;===========================================================