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431 | serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
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4 | ;; Copyright (C) MenuetOS 2000-2004 Ville Mikael Turjanmaa ;; |
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5 | ;; Distributed under terms of the GNU General Public License ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
593 | mikedld | 8 | $Revision: 3168 $ |
9 | |||
10 | |||
1 | ha | 11 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
12 | ;; IRQ0 HANDLER (TIMER INTERRUPT) ;; |
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13 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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14 | |||
465 | serge | 15 | |
1 | ha | 16 | align 32 |
17 | irq0: |
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1055 | Galkov | 18 | pushad |
19 | Mov ds, ax, app_data |
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20 | mov es, ax |
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21 | inc [timer_ticks] |
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22 | mov eax, [timer_ticks] |
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3168 | art_zh | 23 | ; call playNote ; <<<--- Speaker driver |
1055 | Galkov | 24 | sub eax,[next_usage_update] |
25 | cmp eax,100 |
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26 | jb .nocounter |
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27 | add [next_usage_update],100 |
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28 | call updatecputimes |
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29 | .nocounter: |
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30 | mov al,0x20 ; send End Of Interrupt signal |
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31 | out 0x20,al |
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32 | btr dword[DONT_SWITCH], 0 |
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33 | jc .return |
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34 | call find_next_task |
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35 | jz .return ; if there is only one running process |
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36 | call do_change_task |
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37 | .return: |
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38 | popad |
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39 | iretd |
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1 | ha | 40 | |
101 | poddubny | 41 | align 4 |
42 | change_task: |
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1055 | Galkov | 43 | pushfd |
44 | cli |
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45 | pushad |
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46 | call find_next_task |
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47 | jz .return ; the same task -> skip switch |
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48 | @@: mov byte[DONT_SWITCH], 1 |
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49 | call do_change_task |
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50 | .return: |
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51 | popad |
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52 | popfd |
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53 | ret |
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465 | serge | 54 | |
101 | poddubny | 55 | uglobal |
1055 | Galkov | 56 | align 4 |
57 | ; far_jump: |
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58 | ; .offs dd ? |
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59 | ; .sel dw ? |
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60 | context_counter dd 0 ;noname & halyavin |
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61 | next_usage_update dd 0 |
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62 | timer_ticks dd 0 |
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63 | ; prev_slot dd ? |
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64 | ; event_sched dd ? |
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101 | poddubny | 65 | endg |
66 | |||
1055 | Galkov | 67 | align 4 |
101 | poddubny | 68 | update_counters: |
1055 | Galkov | 69 | mov edi, [TASK_BASE] |
70 | rdtsc |
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71 | sub eax, [edi+TASKDATA.counter_add] ; time stamp counter add |
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72 | add [edi+TASKDATA.counter_sum], eax ; counter sum |
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73 | ret |
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74 | align 4 |
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75 | updatecputimes: |
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76 | xor eax,eax |
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77 | xchg eax,[idleuse] |
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78 | mov [idleusesec],eax |
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79 | mov ecx, [TASK_COUNT] |
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80 | mov edi, TASK_DATA |
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81 | .newupdate: |
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82 | xor eax,eax |
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83 | xchg eax,[edi+TASKDATA.counter_sum] |
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84 | mov [edi+TASKDATA.cpu_usage],eax |
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85 | add edi,0x20 |
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86 | loop .newupdate |
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87 | ret |
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1 | ha | 88 | |
1055 | Galkov | 89 | align 4 |
101 | poddubny | 90 | find_next_task: |
1055 | Galkov | 91 | ;info: |
92 | ; Find next task to execute |
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93 | ;retval: |
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94 | ; ebx = address of the APPDATA for the selected task (slot-base) |
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95 | ; esi = previous slot-base ([current_slot] at the begin) |
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96 | ; edi = address of the TASKDATA for the selected task |
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97 | ; ZF = 1 if the task is the same |
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98 | ;warning: |
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99 | ; [CURRENT_TASK] = bh , [TASK_BASE] = edi -- as result |
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100 | ; [current_slot] is not set to new value (ebx)!!! |
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101 | ;scratched: eax,ecx |
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102 | call update_counters ; edi := [TASK_BASE] |
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103 | Mov esi, ebx, [current_slot] |
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104 | .loop: |
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105 | cmp bh,[TASK_COUNT] |
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106 | jb @f |
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107 | xor bh, bh |
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108 | mov edi,CURRENT_TASK |
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109 | @@: inc bh ; ebx += APPDATA.size |
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110 | add edi,0x20 ; edi += TASKDATA.size |
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111 | mov al, [edi+TASKDATA.state] |
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112 | test al, al |
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113 | jz .found ; state == 0 |
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114 | cmp al, 5 |
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115 | jne .loop ; state == 1,2,3,4,9 |
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116 | ; state == 5 |
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117 | pushad ; more freedom for [APPDATA.wait_test] |
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118 | call [ebx+APPDATA.wait_test] |
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119 | mov [esp+28],eax |
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120 | popad |
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121 | or eax,eax |
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122 | jnz @f |
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123 | ; testing for timeout |
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124 | mov ecx, [timer_ticks] |
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125 | sub ecx, [ebx+APPDATA.wait_begin] |
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126 | cmp ecx, [ebx+APPDATA.wait_timeout] |
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127 | jb .loop |
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128 | @@: mov [ebx+APPDATA.wait_param], eax ; retval for wait |
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129 | mov [edi+TASKDATA.state], 0 |
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130 | .found: |
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131 | mov [CURRENT_TASK],bh |
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132 | mov [TASK_BASE],edi |
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133 | rdtsc ;call _rdtsc |
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134 | mov [edi+TASKDATA.counter_add],eax ; for next using update_counters |
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135 | cmp ebx, esi ;esi - previous slot-base |
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136 | ret |
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137 | ;TODO: Надо бы убрать использование do_change_task из V86... |
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138 | ; и после этого перенести обработку TASKDATA.counter_add/sum в do_change_task |
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1 | ha | 139 | |
1055 | Galkov | 140 | align 4 |
101 | poddubny | 141 | do_change_task: |
1055 | Galkov | 142 | ;param: |
143 | ; ebx = address of the APPDATA for incoming task (new) |
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144 | ;warning: |
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145 | ; [CURRENT_TASK] and [TASK_BASE] must be changed before (e.g. in find_next_task) |
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146 | ; [current_slot] is the outcoming (old), and set here to a new value (ebx) |
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147 | ;scratched: eax,ecx,esi |
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148 | mov esi,ebx |
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149 | xchg esi,[current_slot] |
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1220 | serge | 150 | ; set new stack after saving old |
1055 | Galkov | 151 | mov [esi+APPDATA.saved_esp], esp |
152 | mov esp, [ebx+APPDATA.saved_esp] |
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1220 | serge | 153 | ; set new thread io-map |
1055 | Galkov | 154 | Mov dword [page_tabs+((tss._io_map_0 and -4096) shr 10)],eax,[ebx+APPDATA.io_map] |
155 | Mov dword [page_tabs+((tss._io_map_1 and -4096) shr 10)],eax,[ebx+APPDATA.io_map+4] |
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1220 | serge | 156 | ; set new thread memory-map |
1055 | Galkov | 157 | mov ecx, APPDATA.dir_table |
158 | mov eax, [ebx+ecx] ;offset>0x7F |
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159 | cmp eax, [esi+ecx] ;offset>0x7F |
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160 | je @f |
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161 | mov cr3, eax |
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1220 | serge | 162 | @@: |
163 | ; set tss.esp0 |
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164 | |||
1055 | Galkov | 165 | Mov [tss._esp0],eax,[ebx+APPDATA.saved_esp0] |
1220 | serge | 166 | |
167 | mov edx, [ebx+APPDATA.tls_base] |
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168 | cmp edx, [esi+APPDATA.tls_base] |
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169 | je @f |
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170 | |||
171 | mov [tls_data_l+2],dx |
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172 | shr edx,16 |
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173 | mov [tls_data_l+4],dl |
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174 | mov [tls_data_l+7],dh |
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175 | |||
176 | mov dx, app_tls |
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177 | mov fs, dx |
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1298 | diamond | 178 | @@: |
1220 | serge | 179 | ; set gs selector unconditionally |
1055 | Galkov | 180 | Mov gs,ax,graph_data |
181 | ; set CR0.TS |
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182 | cmp bh, byte[fpu_owner] ;bh == incoming task (new) |
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183 | clts ;clear a task switch flag |
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184 | je @f |
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185 | mov eax, cr0 ;and set it again if the owner |
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186 | or eax, CR0_TS ;of a fpu has changed |
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187 | mov cr0, eax |
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188 | @@: ; set context_counter (only for user pleasure ???) |
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189 | inc [context_counter] ;noname & halyavin |
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190 | ; set debug-registers, if it's necessary |
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191 | test byte[ebx+APPDATA.dbg_state], 1 |
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192 | jz @f |
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193 | xor eax, eax |
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194 | mov dr6, eax |
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195 | lea esi,[ebx+ecx+APPDATA.dbg_regs-APPDATA.dir_table] ;offset>0x7F |
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196 | cld |
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197 | macro lodsReg [reg] { |
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198 | lodsd |
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199 | mov reg,eax |
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200 | } lodsReg dr0, dr1, dr2, dr3, dr7 |
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201 | purge lodsReg |
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202 | @@: ret |
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203 | ;end. |
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465 | serge | 204 | |
1434 | serge | 205 | |
206 | |||
207 | struc MUTEX_WAITER |
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208 | { |
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209 | .next rd 1 |
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210 | .prev rd 1 |
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211 | .task rd 1 |
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212 | .sizeof: |
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213 | }; |
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214 | |||
215 | virtual at 0 |
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216 | MUTEX_WAITER MUTEX_WAITER |
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217 | end virtual |
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218 | |||
219 | ;void __fastcall mutex_init(struct mutex *lock) |
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220 | |||
221 | align 4 |
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222 | mutex_init: |
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223 | lea eax, [ecx+MUTEX.next] |
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224 | mov [ecx+MUTEX.count],1 |
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225 | mov [ecx+MUTEX.next], eax |
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226 | mov [ecx+MUTEX.prev], eax |
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227 | ret |
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228 | |||
229 | |||
230 | ;void __fastcall mutex_lock(struct mutex *lock) |
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231 | |||
232 | align 4 |
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233 | mutex_lock: |
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234 | |||
235 | dec [ecx+MUTEX.count] |
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236 | jns .done |
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237 | |||
238 | pushfd |
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239 | cli |
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240 | |||
241 | push esi |
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242 | sub esp, MUTEX_WAITER.sizeof |
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243 | |||
244 | mov eax, [ecx+MUTEX.prev] |
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245 | lea esi, [ecx+MUTEX.next] |
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246 | |||
247 | mov [ecx+MUTEX.prev], esp |
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248 | mov [esp+MUTEX_WAITER.next], esi |
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249 | mov [esp+MUTEX_WAITER.prev], eax |
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250 | mov [eax], esp |
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251 | |||
252 | mov edx, [TASK_BASE] |
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253 | mov [esp+MUTEX_WAITER.task], edx |
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254 | |||
255 | .forever: |
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256 | |||
257 | mov eax, -1 |
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258 | xchg eax, [ecx+MUTEX.count] |
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259 | dec eax |
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260 | jz @F |
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261 | |||
262 | mov [edx+TASKDATA.state], 1 |
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263 | call change_task |
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264 | jmp .forever |
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265 | @@: |
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266 | mov edx, [esp+MUTEX_WAITER.next] |
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267 | mov eax, [esp+MUTEX_WAITER.prev] |
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268 | |||
269 | mov [eax+MUTEX_WAITER.next], edx |
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270 | cmp [ecx+MUTEX.next], esi |
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271 | mov [edx+MUTEX_WAITER.prev], eax |
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272 | jne @F |
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273 | |||
274 | mov [ecx+MUTEX.count], 0 |
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275 | @@: |
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276 | add esp, MUTEX_WAITER.sizeof |
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277 | |||
278 | pop esi |
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279 | popfd |
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280 | .done: |
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281 | ret |
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282 | |||
283 | ;void __fastcall mutex_unlock(struct mutex *lock) |
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284 | |||
285 | align 4 |
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286 | mutex_unlock: |
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287 | |||
288 | pushfd |
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289 | cli |
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290 | |||
291 | lea eax, [ecx+MUTEX.next] |
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292 | cmp eax, [ecx+MUTEX.next] |
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293 | mov [ecx+MUTEX.count], 1 |
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294 | je @F |
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295 | |||
296 | mov eax, [eax+MUTEX_WAITER.task] |
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297 | mov [eax+TASKDATA.state], 0 |
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298 | @@: |
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299 | popfd |
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300 | ret |
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301 | |||
302 | |||
303 | purge MUTEX_WAITER |
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304 | |||
465 | serge | 305 | if 0 |
1434 | serge | 306 | |
465 | serge | 307 | struc TIMER |
308 | { |
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309 | .next dd ? |
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310 | .exp_time dd ? |
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311 | .func dd ? |
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1055 | Galkov | 312 | .arg dd ? |
465 | serge | 313 | } |
314 | |||
1276 | Lrz | 315 | |
1055 | Galkov | 316 | MAX_PROIRITY 0 ; highest, used for kernel tasks |
317 | MAX_USER_PRIORITY 0 ; highest priority for user processes |
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318 | USER_PRIORITY 7 ; default (should correspond to nice 0) |
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319 | MIN_USER_PRIORITY 14 ; minimum priority for user processes |
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320 | IDLE_PRIORITY 15 ; lowest, only IDLE process goes here |
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321 | NR_SCHED_QUEUES 16 ; MUST equal IDLE_PRIORYTY + 1 |
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465 | serge | 322 | |
1276 | Lrz | 323 | uglobal |
465 | serge | 324 | rdy_head rd 16 |
1276 | Lrz | 325 | endg |
465 | serge | 326 | |
327 | align 4 |
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328 | pick_task: |
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329 | |||
1055 | Galkov | 330 | xor eax, eax |
331 | .pick: |
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332 | mov ebx, [rdy_head+eax*4] |
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333 | test ebx, ebx |
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334 | jz .next |
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465 | serge | 335 | |
1055 | Galkov | 336 | mov [next_task], ebx |
337 | test [ebx+flags.billable] |
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338 | jz @F |
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339 | mov [bill_task], ebx |
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340 | @@: |
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341 | ret |
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342 | .next: |
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343 | inc eax |
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344 | jmp .pick |
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465 | serge | 345 | |
346 | ; param |
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347 | ; eax= task |
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348 | ; |
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349 | ; retval |
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350 | ; eax= task |
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351 | ; ebx= queue |
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352 | ; ecx= front if 1 or back if 0 |
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353 | align 4 |
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354 | shed: |
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1055 | Galkov | 355 | cmp [eax+.tics_left], 0 ;signed compare |
356 | mov ebx, [eax+.priority] |
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357 | setg ecx |
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358 | jg @F |
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465 | serge | 359 | |
1055 | Galkov | 360 | mov edx, [eax+.tics_quantum] |
361 | mov [eax+.ticks_left], edx |
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362 | cmp ebx, (IDLE_PRIORITY-1) |
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363 | je @F |
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364 | inc ebx |
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365 | @@: |
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366 | ret |
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465 | serge | 367 | |
368 | ; param |
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369 | ; eax= task |
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370 | align 4 |
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371 | enqueue: |
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1055 | Galkov | 372 | call shed ;eax |
373 | cmp [rdy_head+ebx*4],0 |
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374 | jnz @F |
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465 | serge | 375 | |
1055 | Galkov | 376 | mov [rdy_head+ebx*4], eax |
377 | mov [rdy_tail+ebx*4], eax |
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378 | mov [eax+.next_ready], 0 |
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379 | jmp .pick |
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380 | @@: |
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381 | test ecx, ecx |
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382 | jz .back |
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465 | serge | 383 | |
1055 | Galkov | 384 | mov ecx, [rdy_head+ebx*4] |
385 | mov [eax+.next_ready], ecx |
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386 | mov [rdy_head+ebx*4], eax |
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387 | jmp .pick |
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388 | .back: |
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389 | mov ecx, [rdy_tail+ebx*4] |
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390 | mov [ecx+.next_ready], eax |
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391 | mov [rdy_tail+ebx*4], eax |
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392 | mov [eax+.next_ready], 0 |
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393 | .pick: |
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394 | call pick_proc ;select next task |
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395 | ret |
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465 | serge | 396 | |
397 | end if---><---><<---> |