Subversion Repositories Kolibri OS

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;;                                                              ;;

;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;;

;; Distributed under terms of the GNU General Public License    ;;

;;                                                              ;;

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IRQ_RESERVED   equ 24

IRQ_POOL_SIZE  equ 48

uglobal

align 16

irqh_tab            rd sizeof.LHEAD * IRQ_RESERVED / 4

irqh_pool           rd sizeof.IRQH * 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+sizeof.IRQH

    mov [next_irqh], irqh_pool

@@:

        mov     [eax-sizeof.IRQH], eax

        add     eax, sizeof.IRQH

    loop @B

        mov     [eax-sizeof.IRQH], dword 0

    ret

align 4

proc attach_int_handler stdcall, irq:dword, handler:dword, user_data:dword

         locals

           .irqh dd ?

         endl

         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

        spin_lock_irqsave IrqsList

;allocate handler

         mov ecx, [next_irqh]

         test ecx, ecx

         jz .fail

         mov eax, [ecx]

         mov [next_irqh], eax

         mov [.irqh], ecx

        mov     [irq_failed+ebx*4], 0;clear counter

         mov eax, [user_data]

         mov [ecx+IRQH.handler], edx

         mov [ecx+IRQH.data],    eax

        and     [ecx+IRQH.num_ints], 0

         lea edx, [irqh_tab+ebx*8]

         list_add_tail ecx, edx     ;clobber eax

         stdcall enable_irq, ebx

.fail:

        spin_unlock_irqrestore IrqsList

.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]

        pop     ecx

       pop esi

       pop edi

       pop ebx

       test eax, eax

       jz .next

        inc     [ebx+IRQH.num_ints]

       btr [irq_active_set], ebp

       jmp .next

.done:

       btr [irq_active_set], ebp

       jnc .exit

; There is at least one configuration with one device which generates IRQ

; that is not the same as it should be according to PCI config space.

; For that device, the handler is registered at wrong IRQ.

; As a workaround, when nobody acknowledges the generated IRQ,

; try to ask all other registered handlers; if some handler acknowledges

; the IRQ this time, relink it to the current IRQ list.

; To make this more reliable, for every handler keep number of times

; that it has acknowledged an IRQ, and assume that handlers with at least one

; acknowledged IRQ are registered properly.

; Note: this still isn't 100% correct, because two IRQs can fire simultaneously,

; the better way would be to find the correct IRQ, but I don't know how to do

; this in that case.

; Also, [fdc_irq_func], [irq14_func], [irq15_func] could process interrupt

; but do not return whether they did it, so just ignore IRQs 6, 14, 15.

        cmp     ebp, 6

        jz      .fail

        cmp     ebp, 14

        jz      .fail

        cmp     ebp, 15

        jz      .fail

        push    ebp

        xor     ebp, ebp

.try_other_irqs:

        cmp     ebp, [esp]

        jz      .try_next_irq

        cmp     ebp, 1

        jz      .try_next_irq

        cmp     ebp, 12

        jz      .try_next_irq

        lea     esi, [irqh_tab+ebp*8]

        mov     ebx, esi

.try_next_handler:

        mov     ebx, [ebx+IRQH.list.next]

        cmp     ebx, esi

        je      .try_next_irq

        cmp     [ebx+IRQH.num_ints], 0

        jne     .try_next_handler

; keyboard handler acknowledges everything

        push    [ebx+IRQH.data]

        call    [ebx+IRQH.handler]

        pop     ecx

        test    eax, eax

        jz      .try_next_handler

.found_in_wrong_list:

        DEBUGF 1,'K : warning: relinking handler from IRQ%d to IRQ%d\n',\

                ebp, [esp]

        pop     ebp

        spin_lock_irqsave IrqsList

        list_del ebx

        lea     edx, [irqh_tab+ebp*8]

        list_add_tail ebx, edx

        spin_unlock_irqrestore IrqsList

        jmp     .exit

.try_next_irq:

        inc     ebp

        cmp     ebp, 16

        jb      .try_other_irqs

        pop     ebp

.fail:

       inc [irq_failed+ebp*4]

.exit:

       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