Subversion Repositories Kolibri OS

iglobal

IRQ_COUNT    dd 24

endg

uglobal

irq_mode     rd  1

IOAPIC_base  rd  1

LAPIC_BASE   rd  1

endg

APIC_ID         equ 0x20

APIC_TPR        equ 0x80

APIC_EOI        equ 0xb0

APIC_LDR        equ 0xd0

APIC_DFR        equ 0xe0

APIC_SVR        equ 0xf0

APIC_ISR        equ 0x100

APIC_ESR        equ 0x280

APIC_ICRL       equ 0x300

APIC_ICRH       equ 0x310

APIC_LVT_LINT0	equ	0x350

APIC_LVT_LINT1	equ	0x360

APIC_LVT_err    equ 0x370

; APIC timer

APIC_LVT_timer	equ	0x320

APIC_timer_div	equ	0x3e0

APIC_timer_init	equ	0x380

APIC_timer_cur	equ	0x390

; IOAPIC

IOAPIC_ID       equ 0x0

IOAPIC_VER      equ 0x1

IOAPIC_ARB      equ 0x2

IOAPIC_REDTBL   equ 0x10

align 4

APIC_init:

        mov [irq_mode], IRQ_PIC

        cmp [acpi_ioapic_base], 0

        jz .no_apic

        cmp [acpi_lapic_base], 0

        jz .no_apic

        stdcall load_file, dev_data_path

        test eax, eax

        jz .no_apic

        mov [acpi_dev_data], eax

        mov [acpi_dev_size], ebx

        call  IRQ_mask_all

; IOAPIC init

        stdcall map_io_mem, [acpi_ioapic_base], 0x20, PG_SW

        mov [IOAPIC_base], eax

        mov eax, IOAPIC_VER

        call  IOAPIC_read

        shr eax, 16

        inc al

        movzx eax, al

        cmp al, IRQ_RESERVED

        jbe @f

        mov al, IRQ_RESERVED

@@:

        mov [IRQ_COUNT], eax

	; Reroute IOAPIC & mask all interrupts

        xor ecx, ecx

        mov eax, IOAPIC_REDTBL

@@:

        mov ebx, eax

        call  IOAPIC_read

        mov ah, 0x09    ; Delivery Mode: Lowest Priority, Destination Mode: Logical

        mov al, cl

        add al, 0x20    ; vector

        or  eax, 0x10000    ; Mask Interrupt

        cmp ecx, 16

        jb  .set

        or  eax, 0xa000   ;<<< level-triggered active-low for IRQ16+

.set:

        xchg  eax, ebx

        call  IOAPIC_write

        inc eax

        mov ebx, eax

        call  IOAPIC_read

        or  eax, 0xff000000   ; Destination Field

        xchg  eax, ebx

        call  IOAPIC_write

        inc eax

        inc ecx

        cmp ecx, [IRQ_COUNT]

        jb  @b

        call  LAPIC_init

        mov [irq_mode], IRQ_APIC

        mov al, 0x70

        out 0x22, al

        mov al, 1

        out 0x23, al

        call pci_irq_fixup

.no_apic:

        ret

;===========================================================

align 4

LAPIC_init:

	; Check MSR support

	;....

	; Get LAPIC base address

; mov ecx, 0x1b

; rdmsr       ; it may be replaced to

; and ax, 0xf000    ; mov eax, 0xfee00000

        stdcall map_io_mem, [acpi_lapic_base], 0x1000, PG_SW

        mov [LAPIC_BASE], eax

        mov esi, eax

	; Program Destination Format Register for Flat mode.

        mov eax, [esi + APIC_DFR]

        or  eax, 0xf0000000

        mov [esi + APIC_DFR], eax

	; Program Logical Destination Register.

        mov eax, [esi + APIC_LDR]

        ;and  eax, 0xff000000

        and eax, 0x00ffffff

        or  eax, 0x01000000 ;!!!!!!!!!!!!

        mov [esi + APIC_LDR], eax

	; Task Priority Register initialization.

        mov eax, [esi + APIC_TPR]

        and eax, 0xffffff00

        mov [esi + APIC_TPR], eax

	; Flush the queue

        mov edx, 0

.nxt2:

        mov ecx, 32

        mov eax, [esi + APIC_ISR + edx]

.nxt:

        shr eax, 1

        jnc @f

        mov dword [esi + APIC_EOI], 0 ; EOI

@@:

        loop  .nxt

        add edx, 0x10

        cmp edx, 0x170

        jbe .nxt2

	; Spurious-Interrupt Vector Register initialization.

        mov eax, [esi + APIC_SVR]

        or  eax, 0x1ff

        and eax, 0xfffffdff

        mov [esi + APIC_SVR], eax

	; Initialize LVT LINT0 register. (INTR)

        mov eax, 0x00700

        ; mov eax, 0x10700

        mov [esi + APIC_LVT_LINT0], eax

	; Initialize LVT LINT1 register. (NMI)

        mov eax, 0x00400

        mov [esi + APIC_LVT_LINT1], eax

	; Initialize LVT Error register.

        mov eax, [esi + APIC_LVT_err]

        or  eax, 0x10000    ; bit 16

        mov [esi + APIC_LVT_err], eax

	; LAPIC timer

	; pre init

        mov dword[esi + APIC_timer_div], 1011b  ; 1

        mov dword[esi + APIC_timer_init], 0xffffffff  ; max val

        push  esi

        mov esi, 640        ; wait 0.64 sec

        call  delay_ms

        pop esi

        mov eax, [esi + APIC_timer_cur]   ; read current tick couner

        xor eax, 0xffffffff       ; eax = 0xffffffff - eax

        shr eax, 6          ; eax /= 64; APIC ticks per 0.01 sec

	; Start (every 0.01 sec)

        mov dword[esi + APIC_LVT_timer], 0x30020  ; periodic int 0x20

        mov dword[esi + APIC_timer_init], eax

        ret

;===========================================================

IOAPIC_read:

; in : EAX - IOAPIC register

; out: EAX - readed value

        push  esi

        mov esi, [IOAPIC_base]

        mov [esi], eax

        mov eax, [esi + 0x10]

        pop esi

        ret

align 4

IOAPIC_write:

; in :	EAX - IOAPIC register

;	EBX - value

; out:	none

        push  esi

        mov esi, [IOAPIC_base]

        mov [esi], eax

        mov [esi + 0x10], ebx

        pop esi

        ret

;===========================================================

; Remap all IRQ to 0x20+ Vectors

; IRQ0 to vector 0x20, IRQ1 to vector 0x21....

	; mov	dword[irq_type_to_set], IRQ_TYPE_PIC

        ret

; -----------------------------------------

align 4

PIT_init:

        mov   al,0x34      ; set to 100Hz

        out   0x43,al

        out   0x40,al

        mov   al,0x2e      ; msb

        out   0x40,al

        ret

; -----------------------------------------

align 4

unmask_timer:

        cmp  [irq_mode], IRQ_APIC

        je @f

        stdcall enable_irq, 0

        ret

@@:

	; use PIT

	; in some systems PIT no connected to IOAPIC

	; mov	eax, 0x14

	; call	IOAPIC_read

	; mov	ah, 0x09		; Delivery Mode: Lowest Priority, Destination Mode: Logical

	; mov	al, 0x20

	; or	eax, 0x10000		; Mask Interrupt

	; mov	ebx, eax

	; mov	eax, 0x14

	; call	IOAPIC_write

	; stdcall enable_irq, 2

	; ret

	; use LAPIC timer

        mov esi, [LAPIC_BASE]

        mov eax, [esi + APIC_LVT_timer]

        and eax, 0xfffeffff

        mov [esi + APIC_LVT_timer], eax

        ret

; -----------------------------------------

; Disable all IRQ

align 4

IRQ_mask_all:

        cmp [irq_mode], IRQ_APIC

        mov al, 0xFF

        out 0x21, al

        out 0xA1, al

        mov ecx,0x1000

        ret

.APIC:

        mov ecx, [IRQ_COUNT]

        mov eax, 0x10

@@:

        mov ebx, eax

        call  IOAPIC_read

        or  eax, 0x10000    ; bit 16

        xchg  eax, ebx

        call  IOAPIC_write

        inc eax

        loop  @b

        ret

; -----------------------------------------

; End Of Interrupt

; cl - IRQ number

align 4

irq_eoi:         ; __fastcall

        cmp [irq_mode], IRQ_APIC

        je .APIC

        cmp cl, 8

        mov al, 0x20

        jb  @f

        out 0xa0, al

@@:

        out 0x20, al

        ret

.APIC:

        mov eax, [LAPIC_BASE]

; from dll.inc

align 4

        je .APIC

@@:

       in al,dx

       btr eax, ebx

       out dx, al

        ret

.APIC:

        shl ebx, 1

        add ebx, 0x10

        mov eax, ebx

        xchg  eax, ebx

        call  IOAPIC_write

        ret

endp

align 4

pci_irq_fixup:

        push ebp

        mov esi, [acpi_dev_data]

        lea edi, [esi+ebx]

.iterate:

        jae .done

        mov eax, [esi]

        cmp eax, -1

        je .done

        movzx ebx, al

        movzx ebp, ah

        stdcall pci_read32, ebp, ebx, 0

        jne .skip

        mov eax, [esi+8]

        stdcall pci_write8, ebp, ebx, 0x3C, eax

.skip:

        jmp .iterate

.done:

.fail:

        pop ebp