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;; ;;
;; Copyright (C) KolibriOS team 2004-2011. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
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IRQ_RESERVED equ 16
IRQ_POOL_SIZE equ 48
macro __list_add new, prev, next
{
mov [next+LHEAD.prev], new
mov [new+LHEAD.next], next
mov [new+LHEAD.prev], prev
mov [prev+LHEAD.next], new
}
macro list_add new, head
{
mov eax, [head+LHEAD.next]
__list_add new, head, eax
}
macro list_add_tail new, head
{
mov eax, [head+LHEAD.prev]
__list_add new, eax, head
}
uglobal
align 16
irqh_tab rd LHEAD.sizeof * IRQ_RESERVED / 4
irqh_pool rd IRQH.sizeof * IRQ_POOL_SIZE /4
next_irqh rd 1
irq_active_set rd 1
irq_failed rd IRQ_RESERVED
endg
align 4
init_irqs:
mov ecx, IRQ_RESERVED
mov edi, irqh_tab
@@:
mov eax, edi
stosd
stosd
loop @B
mov ecx, IRQ_POOL_SIZE-1
mov eax, irqh_pool+IRQH.sizeof
mov [next_irqh], irqh_pool
@@:
mov [eax-IRQH.sizeof], eax
add eax, IRQH.sizeof
loop @B
mov [eax-IRQH.sizeof], dword 0
ret
align 4
proc attach_int_handler stdcall, irq:dword, handler:dword, user_data:dword
locals
.irqh dd ?
endl
xchg bx, bx
and [.irqh], 0
push ebx
mov ebx, [irq] ;irq num
test ebx, ebx
jz .err
cmp ebx, IRQ_RESERVED
jae .err
mov edx, [handler]
test edx, edx
jz .err
pushfd
cli
;allocate handler
mov ecx, [next_irqh]
test ecx, ecx
jz .fail
mov eax, [ecx]
mov [next_irqh], eax
mov [.irqh], ecx
mov eax, [user_data]
mov [ecx+IRQH.handler], edx
mov [ecx+IRQH.data], eax
lea edx, [irqh_tab+ebx*8]
list_add_tail ecx, edx ;clobber eax
stdcall enable_irq, [irq]
.fail:
popfd
.err:
pop ebx
mov eax, [.irqh]
ret
endp
if 0
align 4
proc get_int_handler stdcall, irq:dword
mov eax, [irq]
cmp eax, 15
ja .fail
mov eax, [irq_tab + 4 * eax]
ret
.fail:
xor eax, eax
ret
endp
end if
align 4
proc detach_int_handler
ret
endp
macro irq_serv_h [num] {
forward
align 4
.irq_#num :
push num
jmp .main
}
align 16
irq_serv:
; .irq_1:
; push 1
; jmp .main
; etc...
irq_serv_h 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15
irq_serv_h 16, 17, 18, 19, 20, 21, 22, 23
purge irq_serv_h
align 16
.main:
save_ring3_context
mov ebp, [esp + 32]
mov bx, app_data ;os_data
mov ds, bx
mov es, bx
cmp [v86_irqhooks+ebp*8], 0
jnz v86_irq
cmp bp, 6
jnz @f
push ebp
call [fdc_irq_func]
pop ebp
@@:
cmp bp, 14
jnz @f
push ebp
call [irq14_func]
pop ebp
@@:
cmp bp, 15
jnz @f
push ebp
call [irq15_func]
pop ebp
@@:
bts [irq_active_set], ebp
lea esi, [irqh_tab+ebp*8] ; esi= list head
mov ebx, esi
.next:
mov ebx, [ebx+IRQH.list.next] ; ebx= irqh pointer
cmp ebx, esi
je .done
push ebx ; FIX THIS
push edi
push esi
push [ebx+IRQH.data]
call [ebx+IRQH.handler]
add esp, 4
pop esi
pop edi
pop ebx
test eax, eax
jz .next
btr [irq_active_set], ebp
jmp .next
.done:
btr [irq_active_set], ebp
jnc .exit
inc [irq_failed+ebp*4]
.exit:
mov [check_idle_semaphore],5
mov ecx, ebp
call irq_eoi
restore_ring3_context
add esp, 4
iret
align 4
irqD:
push eax
push ecx
xor eax,eax
out 0xf0,al
mov cl, 13
call irq_eoi
pop ecx
pop eax
iret