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Rev | Author | Line No. | Line |
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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: 928 $ |
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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465 | serge | 18 | pushad |
928 | serge | 19 | mov ax, sel_app_data |
465 | serge | 20 | mov ds, ax |
21 | mov es, ax |
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1 | ha | 22 | |
23 | inc dword [timer_ticks] |
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24 | |||
25 | mov eax, [timer_ticks] |
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22 | poddubny | 26 | call playNote ; <<<--- Speaker driver |
27 | |||
1 | ha | 28 | cmp eax,[next_usage_update] |
29 | jb .nocounter |
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30 | add eax,100 |
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31 | mov [next_usage_update],eax |
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32 | call updatecputimes |
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465 | serge | 33 | .nocounter: |
928 | serge | 34 | cmp [dont_switch], 1 |
101 | poddubny | 35 | jne .change_task |
36 | |||
37 | mov al,0x20 ; send End Of Interrupt signal |
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38 | mov dx,0x20 |
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39 | out dx,al |
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40 | |||
928 | serge | 41 | mov [dont_switch], 0 |
101 | poddubny | 42 | |
465 | serge | 43 | popad |
44 | iretd |
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101 | poddubny | 45 | |
465 | serge | 46 | .change_task: |
101 | poddubny | 47 | call update_counters |
48 | |||
49 | call find_next_task |
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50 | mov ecx, eax |
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51 | |||
52 | mov al,0x20 ; send End Of Interrupt signal |
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53 | mov dx,0x20 |
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54 | out dx,al |
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55 | |||
56 | test ecx, ecx ; if there is only one running process |
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57 | jnz .return |
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58 | |||
59 | call do_change_task |
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379 | serge | 60 | |
465 | serge | 61 | .return: |
62 | popad |
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63 | ; popfd |
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64 | iretd |
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101 | poddubny | 65 | |
66 | |||
67 | align 4 |
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68 | change_task: |
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69 | |||
70 | pushfd |
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71 | cli |
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72 | pushad |
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73 | |||
74 | call update_counters |
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465 | serge | 75 | |
76 | if 0 |
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77 | |||
187 | diamond | 78 | ; \begin{Mario79} |
79 | cmp [dma_task_switched], 1 |
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80 | jne .find_next_task |
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81 | mov [dma_task_switched], 0 |
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82 | mov ebx, [dma_process] |
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379 | serge | 83 | cmp [CURRENT_TASK], ebx |
187 | diamond | 84 | je .return |
85 | mov edi, [dma_slot_ptr] |
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379 | serge | 86 | mov [CURRENT_TASK], ebx |
87 | mov [TASK_BASE], edi |
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187 | diamond | 88 | jmp @f |
89 | .find_next_task: |
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90 | ; \end{Mario79} |
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465 | serge | 91 | |
92 | end if |
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93 | |||
101 | poddubny | 94 | call find_next_task |
95 | test eax, eax ; the same task -> skip switch |
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96 | jnz .return |
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187 | diamond | 97 | @@: |
928 | serge | 98 | mov [dont_switch], 1 |
101 | poddubny | 99 | call do_change_task |
100 | |||
465 | serge | 101 | .return: |
101 | poddubny | 102 | popad |
103 | popfd |
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104 | ret |
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105 | |||
106 | |||
107 | uglobal |
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108 | align 4 |
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109 | far_jump: |
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110 | .offs dd ? |
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111 | .sel dw ? |
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112 | context_counter dd ? ;noname & halyavin |
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113 | next_usage_update dd ? |
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114 | timer_ticks dd ? |
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115 | prev_slot dd ? |
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116 | event_sched dd ? |
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117 | endg |
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118 | |||
119 | |||
120 | update_counters: |
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379 | serge | 121 | mov edi, [TASK_BASE] |
115 | poddubny | 122 | mov ebx, [edi+TASKDATA.counter_add] ; time stamp counter add |
465 | serge | 123 | rdtsc |
1 | ha | 124 | sub eax, ebx |
115 | poddubny | 125 | add eax, [edi+TASKDATA.counter_sum] ; counter sum |
126 | mov [edi+TASKDATA.counter_sum], eax |
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101 | poddubny | 127 | ret |
1 | ha | 128 | |
101 | poddubny | 129 | |
130 | ; Find next task to execute |
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131 | ; result: ebx = number of the selected task |
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102 | poddubny | 132 | ; eax = 1 if the task is the same |
133 | ; edi = address of the data for the task in ebx |
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134 | ; [0x3000] = ebx and [0x3010] = edi |
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135 | ; corrupts other regs |
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101 | poddubny | 136 | find_next_task: |
379 | serge | 137 | mov ebx, [CURRENT_TASK] |
138 | mov edi, [TASK_BASE] |
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21 | poddubny | 139 | mov [prev_slot], ebx |
1 | ha | 140 | |
465 | serge | 141 | .waiting_for_termination: |
142 | .waiting_for_reuse: |
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143 | .waiting_for_event: |
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144 | .suspended: |
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379 | serge | 145 | cmp ebx, [TASK_COUNT] |
21 | poddubny | 146 | jb @f |
379 | serge | 147 | mov edi, CURRENT_TASK |
21 | poddubny | 148 | xor ebx, ebx |
465 | serge | 149 | @@: |
21 | poddubny | 150 | |
1 | ha | 151 | add edi,0x20 |
152 | inc ebx |
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153 | |||
115 | poddubny | 154 | mov al, byte [edi+TASKDATA.state] |
101 | poddubny | 155 | test al, al |
156 | jz .found |
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40 | halyavin | 157 | cmp al, 1 |
158 | jz .suspended |
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159 | cmp al, 2 |
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160 | jz .suspended |
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1 | ha | 161 | cmp al, 3 |
162 | je .waiting_for_termination |
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163 | cmp al, 4 |
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164 | je .waiting_for_termination |
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165 | cmp al, 9 |
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166 | je .waiting_for_reuse |
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167 | |||
379 | serge | 168 | mov [CURRENT_TASK],ebx |
169 | mov [TASK_BASE],edi |
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1 | ha | 170 | |
21 | poddubny | 171 | cmp al, 5 |
172 | jne .noevents |
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173 | call get_event_for_app |
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174 | test eax, eax |
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531 | diamond | 175 | jnz @f |
176 | mov eax, ebx |
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177 | shl eax, 8 |
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178 | mov eax, [SLOT_BASE + APPDATA.wait_timeout + eax] |
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179 | cmp eax, [timer_ticks] |
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180 | jae .waiting_for_event |
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181 | xor eax, eax |
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182 | @@: |
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21 | poddubny | 183 | mov [event_sched], eax |
115 | poddubny | 184 | mov [edi+TASKDATA.state], byte 0 |
465 | serge | 185 | .noevents: |
186 | .found: |
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379 | serge | 187 | mov [CURRENT_TASK],ebx |
188 | mov [TASK_BASE],edi |
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465 | serge | 189 | rdtsc ;call _rdtsc |
115 | poddubny | 190 | mov [edi+TASKDATA.counter_add],eax |
1 | ha | 191 | |
465 | serge | 192 | mov esi, [prev_slot] |
101 | poddubny | 193 | xor eax, eax |
465 | serge | 194 | cmp ebx, esi |
101 | poddubny | 195 | sete al |
196 | ret |
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197 | |||
465 | serge | 198 | ; param |
199 | ; ebx = incoming task |
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200 | ; esi = outcomig task |
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201 | |||
101 | poddubny | 202 | do_change_task: |
465 | serge | 203 | |
204 | shl ebx, 8 |
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205 | add ebx, SLOT_BASE |
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206 | mov [current_slot], ebx |
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207 | |||
208 | shl esi, 8 |
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209 | add esi, SLOT_BASE |
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210 | |||
211 | mov [esi+APPDATA.saved_esp], esp |
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212 | mov esp, [ebx+APPDATA.saved_esp] |
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213 | |||
214 | ; set thread io map |
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215 | |||
859 | serge | 216 | ; mov ecx, [ebx+APPDATA.io_map] |
217 | ; mov edx, [ebx+APPDATA.io_map+4] |
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218 | ; mov dword [page_tabs+((tss._io_map_0 and -4096) shr 10)], ecx |
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219 | ; mov dword [page_tabs+((tss._io_map_1 and -4096) shr 10)], edx |
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465 | serge | 220 | |
221 | mov eax, [ebx+APPDATA.dir_table] |
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557 | serge | 222 | cmp eax, [esi+APPDATA.dir_table] |
223 | je @F |
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465 | serge | 224 | mov cr3, eax |
557 | serge | 225 | @@: |
709 | diamond | 226 | mov eax, [ebx+APPDATA.saved_esp0] |
227 | mov [tss._esp0], eax |
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928 | serge | 228 | mov ax, sel_graph_data |
557 | serge | 229 | mov gs, ax |
794 | serge | 230 | |
231 | mov eax, [CURRENT_TASK] |
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232 | cmp eax, [fpu_owner] |
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233 | clts ;clear a task switch flag |
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234 | je @F |
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235 | ;and set it again if the owner |
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236 | mov ecx, cr0 ;of a fpu has changed |
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237 | or ecx, CR0_TS |
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465 | serge | 238 | mov cr0, ecx |
794 | serge | 239 | @@: |
9 | halyavin | 240 | inc [context_counter] ;noname & halyavin |
465 | serge | 241 | test [ebx+APPDATA.dbg_state], 1 |
242 | jnz @F |
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243 | ret |
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244 | @@: |
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245 | mov eax, [ebx+APPDATA.dbg_regs.dr0] |
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246 | mov dr0, eax |
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247 | mov eax, [ebx+APPDATA.dbg_regs.dr1] |
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248 | mov dr1, eax |
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249 | mov eax, [ebx+APPDATA.dbg_regs.dr2] |
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250 | mov dr2, eax |
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251 | mov eax, [ebx+APPDATA.dbg_regs.dr3] |
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252 | mov dr3, eax |
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253 | xor eax, eax |
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254 | mov dr6, eax |
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255 | mov eax, [ebx+APPDATA.dbg_regs.dr7] |
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256 | mov dr7, eax |
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257 | ret |
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8 | poddubny | 258 | |
1 | ha | 259 | align 4 |
260 | updatecputimes: |
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261 | |||
262 | mov eax,[idleuse] |
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263 | mov [idleusesec],eax |
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264 | mov [idleuse],dword 0 |
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379 | serge | 265 | mov ecx, [TASK_COUNT] |
266 | mov edi, TASK_DATA |
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465 | serge | 267 | .newupdate: |
115 | poddubny | 268 | mov ebx,[edi+TASKDATA.counter_sum] |
269 | mov [edi+TASKDATA.cpu_usage],ebx |
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270 | mov [edi+TASKDATA.counter_sum],dword 0 |
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1 | ha | 271 | add edi,0x20 |
272 | dec ecx |
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273 | jnz .newupdate |
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274 | |||
275 | ret |
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465 | serge | 276 | |
277 | if 0 |
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278 | |||
279 | |||
280 | struc TIMER |
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281 | { |
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282 | .next dd ? |
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283 | .exp_time dd ? |
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284 | .func dd ? |
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285 | .arg dd ? |
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286 | } |
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287 | |||
288 | |||
289 | |||
290 | |||
291 | |||
292 | |||
293 | |||
294 | |||
295 | |||
296 | MAX_PROIRITY 0 ; highest, used for kernel tasks |
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297 | MAX_USER_PRIORITY 0 ; highest priority for user processes |
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298 | USER_PRIORITY 7 ; default (should correspond to nice 0) |
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299 | MIN_USER_PRIORITY 14 ; minimum priority for user processes |
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300 | IDLE_PRIORITY 15 ; lowest, only IDLE process goes here |
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301 | NR_SCHED_QUEUES 16 ; MUST equal IDLE_PRIORYTY + 1 |
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302 | |||
303 | rdy_head rd 16 |
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304 | |||
305 | |||
306 | align 4 |
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307 | pick_task: |
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308 | |||
309 | xor eax, eax |
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310 | .pick: |
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311 | mov ebx, [rdy_head+eax*4] |
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312 | test ebx, ebx |
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313 | jz .next |
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314 | |||
315 | mov [next_task], ebx |
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316 | test [ebx+flags.billable] |
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317 | jz @F |
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318 | mov [bill_task], ebx |
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319 | @@: |
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320 | ret |
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321 | .next: |
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322 | inc eax |
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323 | jmp .pick |
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324 | |||
325 | |||
326 | ; param |
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327 | ; eax= task |
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328 | ; |
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329 | ; retval |
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330 | ; eax= task |
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331 | ; ebx= queue |
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332 | ; ecx= front if 1 or back if 0 |
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333 | |||
334 | align 4 |
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335 | shed: |
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336 | cmp [eax+.tics_left], 0 ;signed compare |
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337 | mov ebx, [eax+.priority] |
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338 | setg ecx |
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339 | jg @F |
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340 | |||
341 | mov edx, [eax+.tics_quantum] |
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342 | mov [eax+.ticks_left], edx |
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343 | cmp ebx, (IDLE_PRIORITY-1) |
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344 | je @F |
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345 | inc ebx |
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346 | @@: |
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347 | ret |
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348 | |||
349 | ; param |
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350 | ; eax= task |
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351 | |||
352 | align 4 |
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353 | enqueue: |
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354 | call shed ;eax |
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355 | cmp [rdy_head+ebx*4],0 |
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356 | jnz @F |
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357 | |||
358 | mov [rdy_head+ebx*4], eax |
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359 | mov [rdy_tail+ebx*4], eax |
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360 | mov [eax+.next_ready], 0 |
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361 | jmp .pick |
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362 | @@: |
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363 | test ecx, ecx |
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364 | jz .back |
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365 | |||
366 | mov ecx, [rdy_head+ebx*4] |
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367 | mov [eax+.next_ready], ecx |
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368 | mov [rdy_head+ebx*4], eax |
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369 | jmp .pick |
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370 | .back: |
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371 | mov ecx, [rdy_tail+ebx*4] |
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372 | mov [ecx+.next_ready], eax |
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373 | mov [rdy_tail+ebx*4], eax |
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374 | mov [eax+.next_ready], 0 |
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375 | .pick: |
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376 | call pick_proc ;select next task |
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377 | ret |
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378 | |||
379 | end if---><---><<---> |
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380 |