;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2011. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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 implementation
align 4
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....
align 4
PIC_init:
cli
mov al,0x11 ; icw4, edge triggered
out 0x20,al
out 0xA0,al
mov al,0x20 ; generate 0x20 +
out 0x21,al
mov al,0x28 ; generate 0x28 +
out 0xA1,al
mov al,0x04 ; slave at irq2
out 0x21,al
mov al,0x02 ; at irq9
out 0xA1,al
mov al,0x01 ; 8086 mode
out 0x21,al
out 0xA1,al
call IRQ_mask_all
; mov dword[irq_type_to_set], IRQ_TYPE_PIC
ret
; -----------------------------------------
; TIMER SET TO 1/100 S
align 4
PIT_init:
mov al,0x34 ; set to 100Hz
out 0x43,al
mov al,0x9b ; lsb 1193180 / 1193
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
je .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
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]
mov dword [eax + APIC_EOI], 0 ; EOI
ret
; -----------------------------------------
; from dll.inc
align 4
proc enable_irq stdcall, irq_line:dword
mov ebx, [irq_line]
cmp [irq_mode], IRQ_APIC
je .APIC
mov edx, 0x21
cmp ebx, 8
jb @F
mov edx, 0xA1
sub ebx,8
@@:
in al,dx
btr eax, ebx
out dx, al
ret
.APIC:
shl ebx, 1
add ebx, 0x10
mov eax, ebx
call IOAPIC_read
and eax, 0xfffeffff ; bit 16
xchg eax, ebx
call IOAPIC_write
ret
endp
align 4
pci_irq_fixup:
push ebp
mov esi, [acpi_dev_data]
mov ebx, [acpi_dev_size]
lea edi, [esi+ebx]
.iterate:
cmp esi, edi
jae .done
mov eax, [esi]
cmp eax, -1
je .done
movzx ebx, al
movzx ebp, ah
stdcall pci_read32, ebp, ebx, 0
cmp eax, [esi+4]
jne .skip
mov eax, [esi+8]
stdcall pci_write8, ebp, ebx, 0x3C, eax
.skip:
add esi, 16
jmp .iterate
.done:
.fail:
pop ebp
ret