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Rev | Author | Line No. | Line |
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2288 | clevermous | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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5363 | yogev_ezra | 3 | ;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;; |
2288 | clevermous | 4 | ;; Copyright (C) MenuetOS 2000-2004 Ville Mikael Turjanmaa ;; |
5 | ;; Distributed under terms of the GNU General Public License ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
8 | $Revision: 6079 $ |
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9 | |||
10 | |||
11 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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12 | ;; IRQ0 HANDLER (TIMER INTERRUPT) ;; |
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13 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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14 | |||
15 | |||
16 | align 32 |
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17 | irq0: |
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18 | pushad |
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5788 | serge | 19 | mov ax, app_data |
20 | mov ds, ax |
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2288 | clevermous | 21 | mov es, ax |
22 | inc [timer_ticks] |
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23 | mov eax, [timer_ticks] |
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24 | call playNote ; <<<--- Speaker driver |
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25 | sub eax, [next_usage_update] |
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26 | cmp eax, 100 |
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27 | jb .nocounter |
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28 | add [next_usage_update], 100 |
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29 | call updatecputimes |
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30 | .nocounter: |
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31 | xor ecx, ecx ; send End Of Interrupt signal |
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32 | call irq_eoi |
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4700 | mario79 | 33 | |
3615 | clevermous | 34 | mov bl, SCHEDULE_ANY_PRIORITY |
2288 | clevermous | 35 | call find_next_task |
36 | jz .return ; if there is only one running process |
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37 | call do_change_task |
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38 | .return: |
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39 | popad |
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40 | iretd |
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41 | |||
42 | align 4 |
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43 | change_task: |
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44 | pushfd |
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45 | cli |
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46 | pushad |
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3615 | clevermous | 47 | mov bl, SCHEDULE_ANY_PRIORITY |
2288 | clevermous | 48 | call find_next_task |
49 | jz .return ; the same task -> skip switch |
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4700 | mario79 | 50 | |
2288 | clevermous | 51 | call do_change_task |
52 | .return: |
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53 | popad |
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54 | popfd |
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55 | ret |
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56 | |||
57 | uglobal |
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58 | align 4 |
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59 | ; far_jump: |
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60 | ; .offs dd ? |
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61 | ; .sel dw ? |
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62 | context_counter dd 0 ;noname & halyavin |
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63 | next_usage_update dd 0 |
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64 | timer_ticks dd 0 |
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65 | ; prev_slot dd ? |
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66 | ; event_sched dd ? |
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67 | endg |
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68 | |||
69 | align 4 |
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70 | update_counters: |
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71 | mov edi, [TASK_BASE] |
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72 | rdtsc |
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73 | sub eax, [edi+TASKDATA.counter_add] ; time stamp counter add |
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74 | add [edi+TASKDATA.counter_sum], eax ; counter sum |
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75 | ret |
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76 | align 4 |
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77 | updatecputimes: |
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78 | mov ecx, [TASK_COUNT] |
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79 | mov edi, TASK_DATA |
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80 | .newupdate: |
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81 | xor eax, eax |
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82 | xchg eax, [edi+TASKDATA.counter_sum] |
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83 | mov [edi+TASKDATA.cpu_usage], eax |
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84 | add edi, 0x20 |
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85 | loop .newupdate |
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86 | ret |
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87 | |||
3539 | clevermous | 88 | ;TODO: Надо бы убрать использование do_change_task из V86... |
89 | ; и после этого перенести обработку TASKDATA.counter_add/sum в do_change_task |
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2288 | clevermous | 90 | |
91 | align 4 |
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92 | do_change_task: |
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93 | ;param: |
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94 | ; ebx = address of the APPDATA for incoming task (new) |
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95 | ;warning: |
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96 | ; [CURRENT_TASK] and [TASK_BASE] must be changed before (e.g. in find_next_task) |
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97 | ; [current_slot] is the outcoming (old), and set here to a new value (ebx) |
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98 | ;scratched: eax,ecx,esi |
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99 | mov esi, ebx |
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100 | xchg esi, [current_slot] |
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101 | ; set new stack after saving old |
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102 | mov [esi+APPDATA.saved_esp], esp |
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103 | mov esp, [ebx+APPDATA.saved_esp] |
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104 | ; set new thread io-map |
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5788 | serge | 105 | mov eax, [ebx+APPDATA.io_map] |
106 | mov dword [page_tabs+((tss._io_map_0 and -4096) shr 10)], eax |
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107 | mov eax, [ebx+APPDATA.io_map+4] |
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108 | mov dword [page_tabs+((tss._io_map_1 and -4096) shr 10)], eax |
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2288 | clevermous | 109 | ; set new thread memory-map |
5130 | serge | 110 | mov eax, [ebx+APPDATA.process] |
111 | cmp eax, [current_process] |
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2288 | clevermous | 112 | je @f |
5130 | serge | 113 | mov [current_process], eax |
114 | mov eax, [eax+PROC.pdt_0_phys] |
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2288 | clevermous | 115 | mov cr3, eax |
116 | @@: |
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117 | ; set tss.esp0 |
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118 | |||
5788 | serge | 119 | mov eax, [ebx+APPDATA.saved_esp0] |
120 | mov [tss._esp0], eax |
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2288 | clevermous | 121 | |
122 | mov edx, [ebx+APPDATA.tls_base] |
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123 | |||
124 | mov [tls_data_l+2], dx |
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125 | shr edx, 16 |
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126 | mov [tls_data_l+4], dl |
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127 | mov [tls_data_l+7], dh |
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128 | |||
129 | mov dx, app_tls |
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130 | mov fs, dx |
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5376 | serge | 131 | |
2288 | clevermous | 132 | ; set gs selector unconditionally |
5788 | serge | 133 | Mov ax, graph_data |
134 | Mov gs, ax |
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2288 | clevermous | 135 | ; set CR0.TS |
136 | cmp bh, byte[fpu_owner] ;bh == incoming task (new) |
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137 | clts ;clear a task switch flag |
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138 | je @f |
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139 | mov eax, cr0 ;and set it again if the owner |
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140 | or eax, CR0_TS ;of a fpu has changed |
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141 | mov cr0, eax |
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142 | @@: ; set context_counter (only for user pleasure ???) |
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143 | inc [context_counter] ;noname & halyavin |
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144 | ; set debug-registers, if it's necessary |
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145 | test byte[ebx+APPDATA.dbg_state], 1 |
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146 | jz @f |
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147 | xor eax, eax |
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148 | mov dr6, eax |
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5130 | serge | 149 | lea esi, [ebx+APPDATA.dbg_regs] |
2288 | clevermous | 150 | cld |
151 | macro lodsReg [reg] { |
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152 | lodsd |
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153 | mov reg, eax |
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154 | } lodsReg dr0, dr1, dr2, dr3, dr7 |
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155 | purge lodsReg |
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156 | @@: |
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157 | ret |
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158 | ;end. |
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159 | |||
160 | |||
161 | |||
5344 | serge | 162 | |
3534 | clevermous | 163 | MAX_PRIORITY = 0 ; highest, used for kernel tasks |
164 | USER_PRIORITY = 1 ; default |
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165 | IDLE_PRIORITY = 2 ; lowest, only IDLE thread goes here |
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166 | NR_SCHED_QUEUES = 3 ; MUST equal IDLE_PRIORYTY + 1 |
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167 | |||
168 | uglobal |
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169 | ; [scheduler_current + i*4] = zero if there are no threads with priority i, |
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170 | ; pointer to APPDATA of the current thread with priority i otherwise. |
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171 | align 4 |
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172 | scheduler_current rd NR_SCHED_QUEUES |
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173 | endg |
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174 | |||
175 | ; Add the given thread to the given priority list for the scheduler. |
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176 | ; in: edx -> APPDATA, ecx = priority |
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177 | proc scheduler_add_thread |
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178 | ; 1. Acquire the lock. |
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179 | spin_lock_irqsave SchedulerLock |
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180 | ; 2. Store the priority in APPDATA structure. |
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181 | mov [edx+APPDATA.priority], ecx |
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182 | ; 3. There are two different cases: the given list is empty or not empty. |
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183 | ; In first case, go to 6. Otherwise, advance to 4. |
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184 | mov eax, [scheduler_current+ecx*4] |
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185 | test eax, eax |
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186 | jz .new_list |
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187 | ; 4. Insert the new item immediately before the current item. |
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188 | mov ecx, [eax+APPDATA.in_schedule.prev] |
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189 | mov [edx+APPDATA.in_schedule.next], eax |
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190 | mov [edx+APPDATA.in_schedule.prev], ecx |
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191 | mov [eax+APPDATA.in_schedule.prev], edx |
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192 | mov [ecx+APPDATA.in_schedule.next], edx |
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193 | ; 5. Release the lock and return. |
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194 | spin_unlock_irqrestore SchedulerLock |
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195 | ret |
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196 | .new_list: |
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197 | ; 6. Initialize the list with one item and make it the current item. |
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198 | mov [edx+APPDATA.in_schedule.next], edx |
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199 | mov [edx+APPDATA.in_schedule.prev], edx |
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200 | mov [scheduler_current+ecx*4], edx |
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201 | ; 7. Release the lock and return. |
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202 | spin_unlock_irqrestore SchedulerLock |
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203 | ret |
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204 | endp |
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205 | |||
206 | ; Remove the given thread from the corresponding priority list for the scheduler. |
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207 | ; in: edx -> APPDATA |
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208 | proc scheduler_remove_thread |
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209 | ; 1. Acquire the lock. |
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210 | spin_lock_irqsave SchedulerLock |
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211 | ; 2. Remove the item from the corresponding list. |
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212 | mov eax, [edx+APPDATA.in_schedule.next] |
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213 | mov ecx, [edx+APPDATA.in_schedule.prev] |
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214 | mov [eax+APPDATA.in_schedule.prev], ecx |
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215 | mov [ecx+APPDATA.in_schedule.next], eax |
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216 | ; 3. If the given thread is the current item in the list, |
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217 | ; advance the current item. |
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218 | ; 3a. Check whether the given thread is the current item; |
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219 | ; if no, skip the rest of this step. |
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220 | mov ecx, [edx+APPDATA.priority] |
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221 | cmp [scheduler_current+ecx*4], edx |
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222 | jnz .return |
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223 | ; 3b. Set the current item to eax; step 2 has set eax = next item. |
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224 | mov [scheduler_current+ecx*4], eax |
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225 | ; 3c. If there were only one item in the list, zero the current item. |
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226 | cmp eax, edx |
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227 | jnz .return |
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228 | mov [scheduler_current+ecx*4], 0 |
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229 | .return: |
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230 | ; 4. Release the lock and return. |
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231 | spin_unlock_irqrestore SchedulerLock |
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232 | ret |
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233 | endp |
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234 | |||
3615 | clevermous | 235 | SCHEDULE_ANY_PRIORITY = 0 |
236 | SCHEDULE_HIGHER_PRIORITY = 1 |
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3534 | clevermous | 237 | ;info: |
238 | ; Find next task to execute |
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3615 | clevermous | 239 | ;in: |
240 | ; bl = SCHEDULE_ANY_PRIORITY: |
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241 | ; consider threads with any priority |
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242 | ; bl = SCHEDULE_HIGHER_PRIORITY: |
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243 | ; consider only threads with strictly higher priority than the current one, |
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244 | ; keep running the current thread if other ready threads have the same or lower priority |
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3534 | clevermous | 245 | ;retval: |
246 | ; ebx = address of the APPDATA for the selected task (slot-base) |
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247 | ; edi = address of the TASKDATA for the selected task |
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248 | ; ZF = 1 if the task is the same |
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249 | ;warning: |
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250 | ; [CURRENT_TASK] = bh , [TASK_BASE] = edi -- as result |
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251 | ; [current_slot] is not set to new value (ebx)!!! |
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252 | ;scratched: eax,ecx |
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253 | proc find_next_task |
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254 | call update_counters |
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255 | spin_lock_irqsave SchedulerLock |
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3615 | clevermous | 256 | push NR_SCHED_QUEUES |
257 | ; If bl == SCHEDULE_ANY_PRIORITY = 0, loop over all NR_SCHED lists. |
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258 | ; Otherwise, loop over first [APPDATA.priority] lists. |
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259 | test bl, bl |
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260 | jz .start |
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261 | mov ebx, [current_slot] |
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262 | mov edi, [TASK_BASE] |
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263 | mov eax, [ebx+APPDATA.priority] |
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264 | test eax, eax |
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265 | jz .unlock_found |
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266 | mov [esp], eax |
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267 | .start: |
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3534 | clevermous | 268 | xor ecx, ecx |
269 | .priority_loop: |
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270 | mov ebx, [scheduler_current+ecx*4] |
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271 | test ebx, ebx |
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272 | jz .priority_next |
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273 | .task_loop: |
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274 | mov ebx, [ebx+APPDATA.in_schedule.next] |
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275 | mov edi, ebx |
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276 | shr edi, 3 |
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277 | add edi, CURRENT_TASK - (SLOT_BASE shr 3) |
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278 | mov al, [edi+TASKDATA.state] |
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279 | test al, al |
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280 | jz .task_found ; state == 0 |
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281 | cmp al, 5 |
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282 | jne .task_next ; state == 1,2,3,4,9 |
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283 | ; state == 5 |
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284 | pushad ; more freedom for [APPDATA.wait_test] |
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285 | call [ebx+APPDATA.wait_test] |
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286 | mov [esp+28], eax |
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287 | popad |
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288 | or eax, eax |
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289 | jnz @f |
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290 | ; testing for timeout |
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291 | mov eax, [timer_ticks] |
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292 | sub eax, [ebx+APPDATA.wait_begin] |
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293 | cmp eax, [ebx+APPDATA.wait_timeout] |
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294 | jb .task_next |
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295 | xor eax, eax |
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296 | @@: |
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297 | mov [ebx+APPDATA.wait_param], eax ; retval for wait |
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298 | mov [edi+TASKDATA.state], 0 |
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299 | .task_found: |
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300 | mov [scheduler_current+ecx*4], ebx |
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3617 | clevermous | 301 | ; If we have selected a thread with higher priority |
302 | ; AND rescheduling is due to IRQ, |
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303 | ; turn the current scheduler list one entry back, |
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304 | ; so the current thread will be next after high-priority thread is done. |
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305 | mov ecx, [esp] |
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306 | cmp ecx, NR_SCHED_QUEUES |
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307 | jz .unlock_found |
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308 | mov eax, [current_slot] |
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309 | mov eax, [eax+APPDATA.in_schedule.prev] |
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310 | mov [scheduler_current+ecx*4], eax |
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3615 | clevermous | 311 | .unlock_found: |
312 | pop ecx |
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3534 | clevermous | 313 | spin_unlock_irqrestore SchedulerLock |
314 | .found: |
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315 | mov [CURRENT_TASK], bh |
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316 | mov [TASK_BASE], edi |
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317 | rdtsc ;call _rdtsc |
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318 | mov [edi+TASKDATA.counter_add], eax; for next using update_counters |
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319 | cmp ebx, [current_slot] |
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320 | ret |
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321 | .task_next: |
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322 | cmp ebx, [scheduler_current+ecx*4] |
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323 | jnz .task_loop |
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324 | .priority_next: |
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325 | inc ecx |
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3615 | clevermous | 326 | cmp ecx, [esp] |
3534 | clevermous | 327 | jb .priority_loop |
3615 | clevermous | 328 | mov ebx, [current_slot] |
329 | mov edi, [TASK_BASE] |
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330 | jmp .unlock_found |
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3534 | clevermous | 331 | endp |
332 | |||
2288 | clevermous | 333 | if 0 |
334 | |||
335 | struc TIMER |
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336 | { |
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337 | .next dd ? |
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338 | .exp_time dd ? |
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339 | .func dd ? |
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340 | .arg dd ? |
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341 | } |
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342 | |||
343 | |||
344 | uglobal |
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345 | rdy_head rd 16 |
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346 | endg |
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347 | |||
348 | align 4 |
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349 | pick_task: |
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350 | |||
351 | xor eax, eax |
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352 | .pick: |
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353 | mov ebx, [rdy_head+eax*4] |
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354 | test ebx, ebx |
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355 | jz .next |
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356 | |||
357 | mov [next_task], ebx |
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358 | test [ebx+flags.billable] |
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359 | jz @F |
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360 | mov [bill_task], ebx |
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361 | @@: |
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362 | ret |
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363 | .next: |
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364 | inc eax |
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365 | jmp .pick |
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366 | |||
367 | ; param |
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368 | ; eax= task |
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369 | ; |
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370 | ; retval |
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371 | ; eax= task |
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372 | ; ebx= queue |
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373 | ; ecx= front if 1 or back if 0 |
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374 | align 4 |
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375 | shed: |
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376 | cmp [eax+.tics_left], 0;signed compare |
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377 | mov ebx, [eax+.priority] |
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378 | setg ecx |
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379 | jg @F |
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380 | |||
381 | mov edx, [eax+.tics_quantum] |
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382 | mov [eax+.ticks_left], edx |
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383 | cmp ebx, (IDLE_PRIORITY-1) |
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384 | je @F |
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385 | inc ebx |
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386 | @@: |
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387 | ret |
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388 | |||
389 | ; param |
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390 | ; eax= task |
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391 | align 4 |
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392 | enqueue: |
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393 | call shed;eax |
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394 | cmp [rdy_head+ebx*4], 0 |
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395 | jnz @F |
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396 | |||
397 | mov [rdy_head+ebx*4], eax |
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398 | mov [rdy_tail+ebx*4], eax |
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399 | mov [eax+.next_ready], 0 |
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400 | jmp .pick |
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401 | @@: |
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402 | test ecx, ecx |
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403 | jz .back |
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404 | |||
405 | mov ecx, [rdy_head+ebx*4] |
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406 | mov [eax+.next_ready], ecx |
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407 | mov [rdy_head+ebx*4], eax |
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408 | jmp .pick |
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409 | .back: |
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410 | mov ecx, [rdy_tail+ebx*4] |
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411 | mov [ecx+.next_ready], eax |
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412 | mov [rdy_tail+ebx*4], eax |
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413 | mov [eax+.next_ready], 0 |
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414 | .pick: |
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415 | call pick_proc;select next task |
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416 | ret |
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417 | |||
418 | end if---><---><<---> |