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; \begin{Mario79}
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; \begin{Mario79}
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        cmp     [dma_task_switched], 1
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        cmp     [dma_task_switched], 1
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        jne     .find_next_task
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        jne     .find_next_task
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        mov     [dma_task_switched], 0
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        mov     [dma_task_switched], 0
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        mov     ebx, [dma_process]
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        mov     ebx, [dma_process]
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        cmp     [0x3000], ebx
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        cmp     [CURRENT_TASK], ebx
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        je      .return
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        je      .return
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        mov     edi, [dma_slot_ptr]
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        mov     edi, [dma_slot_ptr]
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        mov     [0x3000], ebx
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        mov     [CURRENT_TASK], ebx
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        mov     [0x3010], edi
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        mov     [TASK_BASE], edi
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        jmp     @f
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        jmp     @f
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.find_next_task:
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.find_next_task:
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; \end{Mario79}
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; \end{Mario79}
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        call  find_next_task
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        call  find_next_task
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        test  eax, eax    ; the same task -> skip switch
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        test  eax, eax    ; the same task -> skip switch
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   event_sched         dd ?
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   event_sched         dd ?
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endg
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endg
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update_counters:
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update_counters:
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        mov   edi, [0x3010]
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        mov   edi, [TASK_BASE]
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        mov   ebx, [edi+TASKDATA.counter_add] ; time stamp counter add
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        mov   ebx, [edi+TASKDATA.counter_add] ; time stamp counter add
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        call  _rdtsc
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        call  _rdtsc
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        sub   eax, ebx
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        sub   eax, ebx
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;         eax = 1  if the task is the same
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;         eax = 1  if the task is the same
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;         edi = address of the data for the task in ebx
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;         edi = address of the data for the task in ebx
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;         [0x3000] = ebx and [0x3010] = edi
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;         [0x3000] = ebx and [0x3010] = edi
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;         corrupts other regs
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;         corrupts other regs
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find_next_task:
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find_next_task:
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        mov   ebx, [0x3000]
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        mov   ebx, [CURRENT_TASK]
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        mov   edi, [0x3010]
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        mov   edi, [TASK_BASE]
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        mov   [prev_slot], ebx
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        mov   [prev_slot], ebx
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      .waiting_for_termination:
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      .waiting_for_termination:
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      .waiting_for_reuse:
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      .waiting_for_reuse:
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      .waiting_for_event:
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      .waiting_for_event:
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      .suspended:
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      .suspended:
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        cmp   ebx, [0x3004]
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        cmp   ebx, [TASK_COUNT]
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        jb    @f
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        jb    @f
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        mov   edi, 0x3000
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        mov   edi, CURRENT_TASK
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        xor   ebx, ebx
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        xor   ebx, ebx
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      @@:
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      @@:
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        cmp   al, 4
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        cmp   al, 4
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        je    .waiting_for_termination
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        je    .waiting_for_termination
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        cmp   al, 9
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        cmp   al, 9
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        je    .waiting_for_reuse
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        je    .waiting_for_reuse
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        mov   [0x3000],ebx
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        mov   [CURRENT_TASK],ebx
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        mov   [0x3010],edi
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        mov   [TASK_BASE],edi
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        cmp   al, 5
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        cmp   al, 5
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        jne   .noevents
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        jne   .noevents
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        call  get_event_for_app
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        call  get_event_for_app
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        test  eax, eax
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        test  eax, eax
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        jz    .waiting_for_event
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        jz    .waiting_for_event
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        mov   [event_sched], eax
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        mov   [event_sched], eax
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        mov   [edi+TASKDATA.state], byte 0
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        mov   [edi+TASKDATA.state], byte 0
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      .noevents:
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      .noevents:
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      .found:
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      .found:
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        mov   [0x3000],ebx
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        mov   [CURRENT_TASK],ebx
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        mov   [0x3010],edi
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        mov   [TASK_BASE],edi
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        call  _rdtsc
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        call  _rdtsc
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        mov   [edi+TASKDATA.counter_add],eax
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        mov   [edi+TASKDATA.counter_add],eax
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updatecputimes:
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updatecputimes:
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        mov  eax,[idleuse]
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        mov  eax,[idleuse]
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        mov  [idleusesec],eax
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        mov  [idleusesec],eax
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        mov  [idleuse],dword 0
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        mov  [idleuse],dword 0
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        mov  ecx, [0x3004]
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        mov  ecx, [TASK_COUNT]
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        mov  edi, 0x3020
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        mov  edi, TASK_DATA
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      .newupdate:
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      .newupdate:
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        mov  ebx,[edi+TASKDATA.counter_sum]
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        mov  ebx,[edi+TASKDATA.counter_sum]
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        mov  [edi+TASKDATA.cpu_usage],ebx
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        mov  [edi+TASKDATA.cpu_usage],ebx
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        mov  [edi+TASKDATA.counter_sum],dword 0
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        mov  [edi+TASKDATA.counter_sum],dword 0