forked from KolibriOS/kolibrios
433 lines
12 KiB
PHP
433 lines
12 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; ;;
|
|
;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;;
|
|
;; Copyright (C) MenuetOS 2000-2004 Ville Mikael Turjanmaa ;;
|
|
;; Distributed under terms of the GNU General Public License ;;
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
$Revision$
|
|
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; IRQ0 HANDLER (TIMER INTERRUPT) ;;
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
|
|
align 32
|
|
irq0:
|
|
pushad
|
|
mov ax, app_data
|
|
mov ds, ax
|
|
mov es, ax
|
|
inc [timer_ticks]
|
|
mov eax, [timer_ticks]
|
|
call playNote ; <<<--- Speaker driver
|
|
sub eax, [next_usage_update]
|
|
cmp eax, 100
|
|
jb .nocounter
|
|
add [next_usage_update], 100
|
|
call updatecputimes
|
|
.nocounter:
|
|
xor ecx, ecx ; send End Of Interrupt signal
|
|
call irq_eoi
|
|
|
|
mov bl, SCHEDULE_ANY_PRIORITY
|
|
call find_next_task
|
|
jz .return ; if there is only one running process
|
|
call do_change_task
|
|
.return:
|
|
popad
|
|
iretd
|
|
|
|
align 4
|
|
change_task:
|
|
pushfd
|
|
cli
|
|
pushad
|
|
mov bl, SCHEDULE_ANY_PRIORITY
|
|
call find_next_task
|
|
jz .return ; the same task -> skip switch
|
|
|
|
call do_change_task
|
|
.return:
|
|
popad
|
|
popfd
|
|
ret
|
|
|
|
uglobal
|
|
align 4
|
|
; far_jump:
|
|
; .offs dd ?
|
|
; .sel dw ?
|
|
context_counter dd 0 ;noname & halyavin
|
|
next_usage_update dd 0
|
|
timer_ticks dd 0
|
|
; prev_slot dd ?
|
|
; event_sched dd ?
|
|
endg
|
|
|
|
align 4
|
|
update_counters:
|
|
mov edi, [TASK_BASE]
|
|
rdtsc
|
|
sub eax, [edi+TASKDATA.counter_add] ; time stamp counter add
|
|
add [edi+TASKDATA.counter_sum], eax ; counter sum
|
|
ret
|
|
align 4
|
|
updatecputimes:
|
|
mov ecx, [TASK_COUNT]
|
|
mov edi, TASK_DATA
|
|
.newupdate:
|
|
xor eax, eax
|
|
xchg eax, [edi+TASKDATA.counter_sum]
|
|
mov [edi+TASKDATA.cpu_usage], eax
|
|
add edi, 0x20
|
|
loop .newupdate
|
|
ret
|
|
|
|
;TODO: Надо бы убрать использование do_change_task из V86...
|
|
; и после этого перенести обработку TASKDATA.counter_add/sum в do_change_task
|
|
|
|
align 4
|
|
do_change_task:
|
|
;param:
|
|
; ebx = address of the APPDATA for incoming task (new)
|
|
;warning:
|
|
; [CURRENT_TASK] and [TASK_BASE] must be changed before (e.g. in find_next_task)
|
|
; [current_slot] is the outcoming (old), and set here to a new value (ebx)
|
|
;scratched: eax,ecx,esi
|
|
mov esi, ebx
|
|
xchg esi, [current_slot]
|
|
; set new stack after saving old
|
|
mov [esi+APPDATA.saved_esp], esp
|
|
mov esp, [ebx+APPDATA.saved_esp]
|
|
; set new thread io-map
|
|
mov eax, [ebx+APPDATA.io_map]
|
|
mov dword [page_tabs+((tss._io_map_0 and -4096) shr 10)], eax
|
|
mov eax, [ebx+APPDATA.io_map+4]
|
|
mov dword [page_tabs+((tss._io_map_1 and -4096) shr 10)], eax
|
|
; set new thread memory-map
|
|
mov eax, [ebx+APPDATA.process]
|
|
cmp eax, [current_process]
|
|
je @f
|
|
mov [current_process], eax
|
|
mov eax, [eax+PROC.pdt_0_phys]
|
|
mov cr3, eax
|
|
@@:
|
|
; set tss.esp0
|
|
|
|
mov eax, [ebx+APPDATA.saved_esp0]
|
|
mov [tss._esp0], eax
|
|
|
|
mov edx, [ebx+APPDATA.tls_base]
|
|
|
|
mov [tls_data_l+2], dx
|
|
shr edx, 16
|
|
mov [tls_data_l+4], dl
|
|
mov [tls_data_l+7], dh
|
|
|
|
mov dx, app_tls
|
|
mov fs, dx
|
|
|
|
; set gs selector unconditionally
|
|
Mov ax, graph_data
|
|
Mov gs, ax
|
|
; TS flag is not triggered by AVX* instructions, therefore
|
|
; we have to xsave/xrstor SIMD registers each task change
|
|
bt [cpu_caps+(CAPS_OSXSAVE/32)*4], CAPS_OSXSAVE mod 32
|
|
jnc .no_xsave
|
|
mov ecx, [esi+APPDATA.fpu_state]
|
|
mov eax, [xsave_eax]
|
|
mov edx, [xsave_edx]
|
|
xsave [ecx]
|
|
mov ecx, [CURRENT_TASK]
|
|
mov [fpu_owner], ecx
|
|
mov ecx, [current_slot]
|
|
mov ecx, [ecx+APPDATA.fpu_state]
|
|
xrstor [ecx]
|
|
.no_xsave:
|
|
; set CR0.TS
|
|
cmp bh, byte[fpu_owner] ;bh == incoming task (new)
|
|
clts ;clear a task switch flag
|
|
je @f
|
|
mov eax, cr0 ;and set it again if the owner
|
|
or eax, CR0_TS ;of a fpu has changed
|
|
mov cr0, eax
|
|
@@: ; set context_counter (only for user pleasure ???)
|
|
inc [context_counter] ;noname & halyavin
|
|
; set debug-registers, if it's necessary
|
|
test byte[ebx+APPDATA.dbg_state], 1
|
|
jz @f
|
|
xor eax, eax
|
|
mov dr6, eax
|
|
lea esi, [ebx+APPDATA.dbg_regs]
|
|
cld
|
|
macro lodsReg [reg] {
|
|
lodsd
|
|
mov reg, eax
|
|
} lodsReg dr0, dr1, dr2, dr3, dr7
|
|
purge lodsReg
|
|
@@:
|
|
ret
|
|
;end.
|
|
|
|
|
|
|
|
|
|
MAX_PRIORITY = 0 ; highest, used for kernel tasks
|
|
USER_PRIORITY = 1 ; default
|
|
IDLE_PRIORITY = 2 ; lowest, only IDLE thread goes here
|
|
NR_SCHED_QUEUES = 3 ; MUST equal IDLE_PRIORYTY + 1
|
|
|
|
uglobal
|
|
; [scheduler_current + i*4] = zero if there are no threads with priority i,
|
|
; pointer to APPDATA of the current thread with priority i otherwise.
|
|
align 4
|
|
scheduler_current rd NR_SCHED_QUEUES
|
|
endg
|
|
|
|
; Add the given thread to the given priority list for the scheduler.
|
|
; in: edx -> APPDATA, ecx = priority
|
|
proc scheduler_add_thread
|
|
; 1. Acquire the lock.
|
|
spin_lock_irqsave SchedulerLock
|
|
; 2. Store the priority in APPDATA structure.
|
|
mov [edx+APPDATA.priority], ecx
|
|
; 3. There are two different cases: the given list is empty or not empty.
|
|
; In first case, go to 6. Otherwise, advance to 4.
|
|
mov eax, [scheduler_current+ecx*4]
|
|
test eax, eax
|
|
jz .new_list
|
|
; 4. Insert the new item immediately before the current item.
|
|
mov ecx, [eax+APPDATA.in_schedule.prev]
|
|
mov [edx+APPDATA.in_schedule.next], eax
|
|
mov [edx+APPDATA.in_schedule.prev], ecx
|
|
mov [eax+APPDATA.in_schedule.prev], edx
|
|
mov [ecx+APPDATA.in_schedule.next], edx
|
|
; 5. Release the lock and return.
|
|
spin_unlock_irqrestore SchedulerLock
|
|
ret
|
|
.new_list:
|
|
; 6. Initialize the list with one item and make it the current item.
|
|
mov [edx+APPDATA.in_schedule.next], edx
|
|
mov [edx+APPDATA.in_schedule.prev], edx
|
|
mov [scheduler_current+ecx*4], edx
|
|
; 7. Release the lock and return.
|
|
spin_unlock_irqrestore SchedulerLock
|
|
ret
|
|
endp
|
|
|
|
; Remove the given thread from the corresponding priority list for the scheduler.
|
|
; in: edx -> APPDATA
|
|
proc scheduler_remove_thread
|
|
; 1. Acquire the lock.
|
|
spin_lock_irqsave SchedulerLock
|
|
; 2. Remove the item from the corresponding list.
|
|
mov eax, [edx+APPDATA.in_schedule.next]
|
|
mov ecx, [edx+APPDATA.in_schedule.prev]
|
|
mov [eax+APPDATA.in_schedule.prev], ecx
|
|
mov [ecx+APPDATA.in_schedule.next], eax
|
|
; 3. If the given thread is the current item in the list,
|
|
; advance the current item.
|
|
; 3a. Check whether the given thread is the current item;
|
|
; if no, skip the rest of this step.
|
|
mov ecx, [edx+APPDATA.priority]
|
|
cmp [scheduler_current+ecx*4], edx
|
|
jnz .return
|
|
; 3b. Set the current item to eax; step 2 has set eax = next item.
|
|
mov [scheduler_current+ecx*4], eax
|
|
; 3c. If there were only one item in the list, zero the current item.
|
|
cmp eax, edx
|
|
jnz .return
|
|
mov [scheduler_current+ecx*4], 0
|
|
.return:
|
|
; 4. Release the lock and return.
|
|
spin_unlock_irqrestore SchedulerLock
|
|
ret
|
|
endp
|
|
|
|
SCHEDULE_ANY_PRIORITY = 0
|
|
SCHEDULE_HIGHER_PRIORITY = 1
|
|
;info:
|
|
; Find next task to execute
|
|
;in:
|
|
; bl = SCHEDULE_ANY_PRIORITY:
|
|
; consider threads with any priority
|
|
; bl = SCHEDULE_HIGHER_PRIORITY:
|
|
; consider only threads with strictly higher priority than the current one,
|
|
; keep running the current thread if other ready threads have the same or lower priority
|
|
;retval:
|
|
; ebx = address of the APPDATA for the selected task (slot-base)
|
|
; edi = address of the TASKDATA for the selected task
|
|
; ZF = 1 if the task is the same
|
|
;warning:
|
|
; [CURRENT_TASK] = bh , [TASK_BASE] = edi -- as result
|
|
; [current_slot] is not set to new value (ebx)!!!
|
|
;scratched: eax,ecx
|
|
proc find_next_task
|
|
call update_counters
|
|
spin_lock_irqsave SchedulerLock
|
|
push NR_SCHED_QUEUES
|
|
; If bl == SCHEDULE_ANY_PRIORITY = 0, loop over all NR_SCHED lists.
|
|
; Otherwise, loop over first [APPDATA.priority] lists.
|
|
test bl, bl
|
|
jz .start
|
|
mov ebx, [current_slot]
|
|
mov edi, [TASK_BASE]
|
|
mov eax, [ebx+APPDATA.priority]
|
|
test eax, eax
|
|
jz .unlock_found
|
|
mov [esp], eax
|
|
.start:
|
|
xor ecx, ecx
|
|
.priority_loop:
|
|
mov ebx, [scheduler_current+ecx*4]
|
|
test ebx, ebx
|
|
jz .priority_next
|
|
.task_loop:
|
|
mov ebx, [ebx+APPDATA.in_schedule.next]
|
|
mov edi, ebx
|
|
shr edi, 3
|
|
add edi, CURRENT_TASK - (SLOT_BASE shr 3)
|
|
mov al, [edi+TASKDATA.state]
|
|
test al, al
|
|
jz .task_found ; state == 0
|
|
cmp al, 5
|
|
jne .task_next ; state == 1,2,3,4,9
|
|
; state == 5
|
|
pushad ; more freedom for [APPDATA.wait_test]
|
|
call [ebx+APPDATA.wait_test]
|
|
mov [esp+28], eax
|
|
popad
|
|
or eax, eax
|
|
jnz @f
|
|
; testing for timeout
|
|
mov eax, [timer_ticks]
|
|
sub eax, [ebx+APPDATA.wait_begin]
|
|
cmp eax, [ebx+APPDATA.wait_timeout]
|
|
jb .task_next
|
|
xor eax, eax
|
|
@@:
|
|
mov [ebx+APPDATA.wait_param], eax ; retval for wait
|
|
mov [edi+TASKDATA.state], 0
|
|
.task_found:
|
|
mov [scheduler_current+ecx*4], ebx
|
|
; If we have selected a thread with higher priority
|
|
; AND rescheduling is due to IRQ,
|
|
; turn the current scheduler list one entry back,
|
|
; so the current thread will be next after high-priority thread is done.
|
|
mov ecx, [esp]
|
|
cmp ecx, NR_SCHED_QUEUES
|
|
jz .unlock_found
|
|
mov eax, [current_slot]
|
|
mov eax, [eax+APPDATA.in_schedule.prev]
|
|
mov [scheduler_current+ecx*4], eax
|
|
.unlock_found:
|
|
pop ecx
|
|
spin_unlock_irqrestore SchedulerLock
|
|
.found:
|
|
mov [CURRENT_TASK], bh
|
|
mov [TASK_BASE], edi
|
|
rdtsc ;call _rdtsc
|
|
mov [edi+TASKDATA.counter_add], eax; for next using update_counters
|
|
cmp ebx, [current_slot]
|
|
ret
|
|
.task_next:
|
|
cmp ebx, [scheduler_current+ecx*4]
|
|
jnz .task_loop
|
|
.priority_next:
|
|
inc ecx
|
|
cmp ecx, [esp]
|
|
jb .priority_loop
|
|
mov ebx, [current_slot]
|
|
mov edi, [TASK_BASE]
|
|
jmp .unlock_found
|
|
endp
|
|
|
|
if 0
|
|
|
|
struc TIMER
|
|
{
|
|
.next dd ?
|
|
.exp_time dd ?
|
|
.func dd ?
|
|
.arg dd ?
|
|
}
|
|
|
|
|
|
uglobal
|
|
rdy_head rd 16
|
|
endg
|
|
|
|
align 4
|
|
pick_task:
|
|
|
|
xor eax, eax
|
|
.pick:
|
|
mov ebx, [rdy_head+eax*4]
|
|
test ebx, ebx
|
|
jz .next
|
|
|
|
mov [next_task], ebx
|
|
test [ebx+flags.billable]
|
|
jz @F
|
|
mov [bill_task], ebx
|
|
@@:
|
|
ret
|
|
.next:
|
|
inc eax
|
|
jmp .pick
|
|
|
|
; param
|
|
; eax= task
|
|
;
|
|
; retval
|
|
; eax= task
|
|
; ebx= queue
|
|
; ecx= front if 1 or back if 0
|
|
align 4
|
|
shed:
|
|
cmp [eax+.tics_left], 0;signed compare
|
|
mov ebx, [eax+.priority]
|
|
setg ecx
|
|
jg @F
|
|
|
|
mov edx, [eax+.tics_quantum]
|
|
mov [eax+.ticks_left], edx
|
|
cmp ebx, (IDLE_PRIORITY-1)
|
|
je @F
|
|
inc ebx
|
|
@@:
|
|
ret
|
|
|
|
; param
|
|
; eax= task
|
|
align 4
|
|
enqueue:
|
|
call shed;eax
|
|
cmp [rdy_head+ebx*4], 0
|
|
jnz @F
|
|
|
|
mov [rdy_head+ebx*4], eax
|
|
mov [rdy_tail+ebx*4], eax
|
|
mov [eax+.next_ready], 0
|
|
jmp .pick
|
|
@@:
|
|
test ecx, ecx
|
|
jz .back
|
|
|
|
mov ecx, [rdy_head+ebx*4]
|
|
mov [eax+.next_ready], ecx
|
|
mov [rdy_head+ebx*4], eax
|
|
jmp .pick
|
|
.back:
|
|
mov ecx, [rdy_tail+ebx*4]
|
|
mov [ecx+.next_ready], eax
|
|
mov [rdy_tail+ebx*4], eax
|
|
mov [eax+.next_ready], 0
|
|
.pick:
|
|
call pick_proc;select next task
|
|
ret
|
|
|
|
end if
|