BlueGreycalmElegant

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Compare Revisions

• This comparison shows the changes necessary to convert path

  → /kernel/trunk/core/sched.inc @ 464

  → /kernel/trunk/core/sched.inc @ 465

  ↔ Reverse comparison

• Compare Path:	Rev

  With Path:	Rev

Regard whitespace Rev 464 → Rev 465

/kernel/trunk/core/sched.inc
10,10 → 10,12
;; IRQ0 HANDLER (TIMER INTERRUPT) ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
align 32
irq0:
save_ring3_context
mov ax, os_data
; pushfd
pushad
mov ax, app_data ;
mov ds, ax
mov es, ax
28,7 → 30,6
mov [next_usage_update],eax
call updatecputimes
.nocounter:
cmp [DONT_SWITCH], byte 1
jne .change_task
38,8 → 39,9
mov [DONT_SWITCH], byte 0
restore_ring3_context
iret
popad
; popfd
iretd
.change_task:
call update_counters
57,8 → 59,9
call do_change_task
.return:
restore_ring3_context
iret
popad
; popfd
iretd
align 4
69,6 → 72,9
pushad
call update_counters
if 0
; \begin{Mario79}
cmp [dma_task_switched], 1
jne .find_next_task
82,6 → 88,9
jmp @f
.find_next_task:
; \end{Mario79}
end if
call find_next_task
test eax, eax ; the same task -> skip switch
jnz .return
92,7 → 101,6
.return:
popad
popfd
ret
112,7 → 120,7
update_counters:
mov edi, [TASK_BASE]
mov ebx, [edi+TASKDATA.counter_add] ; time stamp counter add
call _rdtsc
rdtsc
sub eax, ebx
add eax, [edi+TASKDATA.counter_sum] ; counter sum
mov [edi+TASKDATA.counter_sum], eax
159,12 → 167,6
mov [CURRENT_TASK],ebx
mov [TASK_BASE],edi
push ebx
shl ebx, 8
mov ebx, [SLOT_BASE + ebx + APPDATA.pl0_stack]
add ebx, RING0_STACK_SIZE
mov [CURRENT_RING0_ESP], ebx
pop ebx
cmp al, 5
jne .noevents
177,27 → 179,66
.found:
mov [CURRENT_TASK],ebx
mov [TASK_BASE],edi
call _rdtsc
rdtsc ;call _rdtsc
mov [edi+TASKDATA.counter_add],eax
mov esi, [prev_slot]
xor eax, eax
cmp ebx, [prev_slot]
cmp ebx, esi
sete al
ret
; in: ebx = TSS selector index
; param
; ebx = incoming task
; esi = outcomig task
do_change_task:
shl ebx, 3
xor eax, eax
add ebx, tss0
mov [far_jump.sel], bx ; selector
mov [far_jump.offs], eax ; offset
jmp pword [far_jump]
shl ebx, 8
add ebx, SLOT_BASE
mov [current_slot], ebx
shl esi, 8
add esi, SLOT_BASE
mov [esi+APPDATA.saved_esp], esp
mov esp, [ebx+APPDATA.saved_esp]
; set thread io map
mov ecx, [ebx+APPDATA.io_map]
mov edx, [ebx+APPDATA.io_map+4]
mov dword [page_tabs+((tss._io_map_0 and -4096) shr 10)], ecx
mov dword [page_tabs+((tss._io_map_1 and -4096) shr 10)], edx
mov eax, [ebx+APPDATA.dir_table]
mov cr3, eax
mov ebx, [ebx+APPDATA.pl0_stack]
add ebx, RING0_STACK_SIZE
mov [tss._esp0], ebx
mov ecx, cr0
or ecx, CR0_TS ;set task switch flag
mov cr0, ecx
inc [context_counter] ;noname & halyavin
test [ebx+APPDATA.dbg_state], 1
jnz @F
ret
@@:
mov eax, [ebx+APPDATA.dbg_regs.dr0]
mov dr0, eax
mov eax, [ebx+APPDATA.dbg_regs.dr1]
mov dr1, eax
mov eax, [ebx+APPDATA.dbg_regs.dr2]
mov dr2, eax
mov eax, [ebx+APPDATA.dbg_regs.dr3]
mov dr3, eax
xor eax, eax
mov dr6, eax
mov eax, [ebx+APPDATA.dbg_regs.dr7]
mov dr7, eax
ret
align 4
updatecputimes:
215,3 → 256,108
jnz .newupdate
ret
if 0
struc TIMER
{
.next dd ?
.exp_time dd ?
.func dd ?
.arg dd ?
}
MAX_PROIRITY 0 ; highest, used for kernel tasks
MAX_USER_PRIORITY 0 ; highest priority for user processes
USER_PRIORITY 7 ; default (should correspond to nice 0)
MIN_USER_PRIORITY 14 ; minimum priority for user processes
IDLE_PRIORITY 15 ; lowest, only IDLE process goes here
NR_SCHED_QUEUES 16 ; MUST equal IDLE_PRIORYTY + 1
rdy_head rd 16
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