294 lines
8.2 KiB
PHP
294 lines
8.2 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
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;; Copyright (C) MenuetOS 2000-2004 Ville Mikael Turjanmaa ;;
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;; Distributed under terms of the GNU General Public License ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision$
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; IRQ0 HANDLER (TIMER INTERRUPT) ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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align 32
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irq0:
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pushad
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Mov ds, ax, app_data
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mov es, ax
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inc [timer_ticks]
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mov eax, [timer_ticks]
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call playNote ; <<<--- Speaker driver
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sub eax,[next_usage_update]
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cmp eax,100
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jb .nocounter
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add [next_usage_update],100
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call updatecputimes
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.nocounter:
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mov al,0x20 ; send End Of Interrupt signal
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out 0x20,al
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btr dword[DONT_SWITCH], 0
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jc .return
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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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popad
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iretd
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align 4
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change_task:
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pushfd
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cli
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pushad
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if 0
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; \begin{Mario79} ; <- must be refractoried, if used...
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cmp [dma_task_switched], 1
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jne .find_next_task
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mov [dma_task_switched], 0
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mov ebx, [dma_process]
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cmp [CURRENT_TASK], ebx
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je .return
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mov edi, [dma_slot_ptr]
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mov [CURRENT_TASK], ebx
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mov [TASK_BASE], edi
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jmp @f
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.find_next_task:
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; \end{Mario79}
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end if
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call find_next_task
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jz .return ; the same task -> skip switch
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@@: mov byte[DONT_SWITCH], 1
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call do_change_task
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.return:
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popad
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popfd
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ret
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uglobal
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align 4
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; far_jump:
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; .offs dd ?
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; .sel dw ?
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context_counter dd 0 ;noname & halyavin
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next_usage_update dd 0
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timer_ticks dd 0
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; prev_slot dd ?
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; event_sched dd ?
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endg
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align 4
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update_counters:
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mov edi, [TASK_BASE]
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rdtsc
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sub eax, [edi+TASKDATA.counter_add] ; time stamp counter add
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add [edi+TASKDATA.counter_sum], eax ; counter sum
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ret
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align 4
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updatecputimes:
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xor eax,eax
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xchg eax,[idleuse]
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mov [idleusesec],eax
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mov ecx, [TASK_COUNT]
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mov edi, TASK_DATA
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.newupdate:
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xor eax,eax
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xchg eax,[edi+TASKDATA.counter_sum]
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mov [edi+TASKDATA.cpu_usage],eax
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add edi,0x20
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loop .newupdate
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ret
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align 4
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find_next_task:
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;info:
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; Find next task to execute
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;retval:
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; ebx = address of the APPDATA for the selected task (slot-base)
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; esi = previous slot-base ([current_slot] at the begin)
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; edi = address of the TASKDATA for the selected task
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; ZF = 1 if the task is the same
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;warning:
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; [CURRENT_TASK] = bh , [TASK_BASE] = edi -- as result
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; [current_slot] is not set to new value (ebx)!!!
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;scratched: eax,ecx
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call update_counters ; edi := [TASK_BASE]
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Mov esi, ebx, [current_slot]
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.loop:
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cmp bh,[TASK_COUNT]
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jb @f
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xor bh, bh
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mov edi,CURRENT_TASK
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@@: inc bh ; ebx += APPDATA.size
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add edi,0x20 ; edi += TASKDATA.size
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mov al, [edi+TASKDATA.state]
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test al, al
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jz .found ; state == 0
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cmp al, 5
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jne .loop ; state == 1,2,3,4,9
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; state == 5
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pushad ; more freedom for [APPDATA.wait_test]
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call [ebx+APPDATA.wait_test]
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mov [esp+28],eax
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popad
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or eax,eax
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jnz @f
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; testing for timeout
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mov ecx, [timer_ticks]
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sub ecx, [ebx+APPDATA.wait_begin]
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cmp ecx, [ebx+APPDATA.wait_timeout]
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jb .loop
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@@: mov [ebx+APPDATA.wait_param], eax ; retval for wait
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mov [edi+TASKDATA.state], 0
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.found:
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mov [CURRENT_TASK],bh
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mov [TASK_BASE],edi
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rdtsc ;call _rdtsc
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mov [edi+TASKDATA.counter_add],eax ; for next using update_counters
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cmp ebx, esi ;esi - previous slot-base
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ret
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;TODO: <EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> do_change_task <EFBFBD><EFBFBD> V86...
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; <EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> TASKDATA.counter_add/sum <EFBFBD> do_change_task
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align 4
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do_change_task:
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;param:
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; ebx = address of the APPDATA for incoming task (new)
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;warning:
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; [CURRENT_TASK] and [TASK_BASE] must be changed before (e.g. in find_next_task)
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; [current_slot] is the outcoming (old), and set here to a new value (ebx)
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;scratched: eax,ecx,esi
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mov esi,ebx
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xchg esi,[current_slot]
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; set new stack after saving old
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mov [esi+APPDATA.saved_esp], esp
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mov esp, [ebx+APPDATA.saved_esp]
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; set new thread io-map
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Mov dword [page_tabs+((tss._io_map_0 and -4096) shr 10)],eax,[ebx+APPDATA.io_map]
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Mov dword [page_tabs+((tss._io_map_1 and -4096) shr 10)],eax,[ebx+APPDATA.io_map+4]
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; set new thread memory-map
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mov ecx, APPDATA.dir_table
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mov eax, [ebx+ecx] ;offset>0x7F
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cmp eax, [esi+ecx] ;offset>0x7F
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je @f
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mov cr3, eax
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@@: ; set tss.esp0
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Mov [tss._esp0],eax,[ebx+APPDATA.saved_esp0]
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; set gs selector unconditionally
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Mov gs,ax,graph_data
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; set CR0.TS
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cmp bh, byte[fpu_owner] ;bh == incoming task (new)
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clts ;clear a task switch flag
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je @f
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mov eax, cr0 ;and set it again if the owner
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or eax, CR0_TS ;of a fpu has changed
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mov cr0, eax
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@@: ; set context_counter (only for user pleasure ???)
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inc [context_counter] ;noname & halyavin
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; set debug-registers, if it's necessary
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test byte[ebx+APPDATA.dbg_state], 1
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jz @f
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xor eax, eax
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mov dr6, eax
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lea esi,[ebx+ecx+APPDATA.dbg_regs-APPDATA.dir_table] ;offset>0x7F
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cld
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macro lodsReg [reg] {
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lodsd
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mov reg,eax
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} lodsReg dr0, dr1, dr2, dr3, dr7
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purge lodsReg
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@@: ret
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;end.
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if 0
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struc TIMER
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{
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.next dd ?
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.exp_time dd ?
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.func dd ?
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.arg dd ?
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}
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MAX_PROIRITY 0 ; highest, used for kernel tasks
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MAX_USER_PRIORITY 0 ; highest priority for user processes
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USER_PRIORITY 7 ; default (should correspond to nice 0)
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MIN_USER_PRIORITY 14 ; minimum priority for user processes
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IDLE_PRIORITY 15 ; lowest, only IDLE process goes here
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NR_SCHED_QUEUES 16 ; MUST equal IDLE_PRIORYTY + 1
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rdy_head rd 16
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align 4
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pick_task:
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xor eax, eax
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.pick:
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mov ebx, [rdy_head+eax*4]
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test ebx, ebx
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jz .next
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mov [next_task], ebx
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test [ebx+flags.billable]
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jz @F
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mov [bill_task], ebx
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@@:
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ret
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.next:
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inc eax
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jmp .pick
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; param
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; eax= task
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;
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; retval
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; eax= task
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; ebx= queue
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; ecx= front if 1 or back if 0
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align 4
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shed:
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cmp [eax+.tics_left], 0 ;signed compare
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mov ebx, [eax+.priority]
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setg ecx
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jg @F
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mov edx, [eax+.tics_quantum]
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mov [eax+.ticks_left], edx
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cmp ebx, (IDLE_PRIORITY-1)
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je @F
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inc ebx
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@@:
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ret
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; param
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; eax= task
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align 4
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enqueue:
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call shed ;eax
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cmp [rdy_head+ebx*4],0
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jnz @F
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mov [rdy_head+ebx*4], eax
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mov [rdy_tail+ebx*4], eax
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mov [eax+.next_ready], 0
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jmp .pick
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@@:
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test ecx, ecx
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jz .back
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mov ecx, [rdy_head+ebx*4]
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mov [eax+.next_ready], ecx
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mov [rdy_head+ebx*4], eax
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jmp .pick
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.back:
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mov ecx, [rdy_tail+ebx*4]
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mov [ecx+.next_ready], eax
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mov [rdy_tail+ebx*4], eax
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mov [eax+.next_ready], 0
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.pick:
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call pick_proc ;select next task
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ret
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end if
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