forked from KolibriOS/kolibrios
298 lines
6.6 KiB
PHP
298 lines
6.6 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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IRQ_RESERVED equ 24
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IRQ_POOL_SIZE equ 48
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uglobal
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align 16
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irqh_tab rd sizeof.LHEAD * IRQ_RESERVED / 4
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irqh_pool rd sizeof.IRQH * IRQ_POOL_SIZE /4
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next_irqh rd 1
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irq_active_set rd 1
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irq_failed rd IRQ_RESERVED
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endg
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align 4
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init_irqs:
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mov ecx, IRQ_RESERVED
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mov edi, irqh_tab
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@@:
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mov eax, edi
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stosd
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stosd
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loop @B
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mov ecx, IRQ_POOL_SIZE-1
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mov eax, irqh_pool+sizeof.IRQH
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mov [next_irqh], irqh_pool
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@@:
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mov [eax-sizeof.IRQH], eax
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add eax, sizeof.IRQH
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loop @B
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mov [eax-sizeof.IRQH], dword 0
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ret
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align 4
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proc attach_int_handler stdcall, irq:dword, handler:dword, user_data:dword
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locals
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.irqh dd ?
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endl
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and [.irqh], 0
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push ebx
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mov ebx, [irq] ;irq num
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test ebx, ebx
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jz .err
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cmp ebx, IRQ_RESERVED
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jae .err
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mov edx, [handler]
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test edx, edx
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jz .err
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spin_lock_irqsave IrqsList
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;allocate handler
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mov ecx, [next_irqh]
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test ecx, ecx
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jz .fail
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mov eax, [ecx]
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mov [next_irqh], eax
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mov [.irqh], ecx
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mov [irq_failed+ebx*4], 0;clear counter
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mov eax, [user_data]
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mov [ecx+IRQH.handler], edx
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mov [ecx+IRQH.data], eax
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and [ecx+IRQH.num_ints], 0
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lea edx, [irqh_tab+ebx*8]
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list_add_tail ecx, edx ;clobber eax
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stdcall enable_irq, ebx
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.fail:
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spin_unlock_irqrestore IrqsList
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.err:
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pop ebx
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mov eax, [.irqh]
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ret
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endp
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if 0
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align 4
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proc get_int_handler stdcall, irq:dword
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mov eax, [irq]
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cmp eax, 15
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ja .fail
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mov eax, [irq_tab + 4 * eax]
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ret
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.fail:
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xor eax, eax
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ret
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endp
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end if
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align 4
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proc detach_int_handler
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ret
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endp
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macro irq_serv_h [num] {
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forward
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align 4
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.irq_#num :
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push num
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jmp .main
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}
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align 16
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irq_serv:
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; .irq_1:
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; push 1
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; jmp .main
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; etc...
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irq_serv_h 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15
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irq_serv_h 16, 17, 18, 19, 20, 21, 22, 23
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purge irq_serv_h
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align 16
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.main:
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save_ring3_context
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mov ebp, [esp + 32]
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mov bx, app_data;os_data
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mov ds, bx
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mov es, bx
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cmp [v86_irqhooks+ebp*8], 0
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jnz v86_irq
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cmp bp, 6
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jnz @f
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push ebp
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call [fdc_irq_func]
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pop ebp
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@@:
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cmp bp, 14
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jnz @f
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push ebp
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call [irq14_func]
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pop ebp
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@@:
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cmp bp, 15
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jnz @f
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push ebp
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call [irq15_func]
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pop ebp
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@@:
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bts [irq_active_set], ebp
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lea esi, [irqh_tab+ebp*8] ; esi= list head
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mov ebx, esi
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.next:
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mov ebx, [ebx+IRQH.list.next]; ebx= irqh pointer
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cmp ebx, esi
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je .done
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push ebx ; FIX THIS
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push edi
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push esi
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push [ebx+IRQH.data]
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call [ebx+IRQH.handler]
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pop ecx
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pop esi
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pop edi
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pop ebx
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test eax, eax
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jz .next
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inc [ebx+IRQH.num_ints]
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btr [irq_active_set], ebp
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jmp .next
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.done:
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btr [irq_active_set], ebp
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jnc .exit
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; There is at least one configuration with one device which generates IRQ
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; that is not the same as it should be according to PCI config space.
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; For that device, the handler is registered at wrong IRQ.
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; As a workaround, when nobody acknowledges the generated IRQ,
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; try to ask all other registered handlers; if some handler acknowledges
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; the IRQ this time, relink it to the current IRQ list.
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; To make this more reliable, for every handler keep number of times
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; that it has acknowledged an IRQ, and assume that handlers with at least one
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; acknowledged IRQ are registered properly.
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; Note: this still isn't 100% correct, because two IRQs can fire simultaneously,
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; the better way would be to find the correct IRQ, but I don't know how to do
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; this in that case.
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; Also, [fdc_irq_func], [irq14_func], [irq15_func] could process interrupt
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; but do not return whether they did it, so just ignore IRQs 6, 14, 15.
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cmp ebp, 6
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jz .fail
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cmp ebp, 14
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jz .fail
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cmp ebp, 15
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jz .fail
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push ebp
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xor ebp, ebp
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.try_other_irqs:
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cmp ebp, [esp]
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jz .try_next_irq
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cmp ebp, 1
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jz .try_next_irq
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cmp ebp, 12
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jz .try_next_irq
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lea esi, [irqh_tab+ebp*8]
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mov ebx, esi
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.try_next_handler:
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mov ebx, [ebx+IRQH.list.next]
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cmp ebx, esi
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je .try_next_irq
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cmp [ebx+IRQH.num_ints], 0
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jne .try_next_handler
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; keyboard handler acknowledges everything
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push [ebx+IRQH.data]
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call [ebx+IRQH.handler]
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pop ecx
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test eax, eax
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jz .try_next_handler
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.found_in_wrong_list:
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DEBUGF 1,'K : warning: relinking handler from IRQ%d to IRQ%d\n',\
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ebp, [esp]
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pop ebp
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spin_lock_irqsave IrqsList
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list_del ebx
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lea edx, [irqh_tab+ebp*8]
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list_add_tail ebx, edx
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spin_unlock_irqrestore IrqsList
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jmp .exit
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.try_next_irq:
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inc ebp
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cmp ebp, 16
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jb .try_other_irqs
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pop ebp
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.fail:
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inc [irq_failed+ebp*4]
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.exit:
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mov ecx, ebp
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call irq_eoi
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; IRQ handler could make some kernel thread ready; reschedule
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mov bl, SCHEDULE_HIGHER_PRIORITY
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call find_next_task
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jz .return ; if there is only one running process
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call do_change_task
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.return:
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restore_ring3_context
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add esp, 4
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iret
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align 4
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irqD:
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push eax
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push ecx
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xor eax, eax
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out 0xf0, al
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mov cl, 13
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call irq_eoi
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pop ecx
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pop eax
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iret
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