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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: 2382 $ |
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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23 | call playNote ; <<<--- Speaker driver |
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2382 | hidnplayr | 24 | sub eax, [next_usage_update] |
25 | cmp eax, 100 |
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1055 | Galkov | 26 | jb .nocounter |
2382 | hidnplayr | 27 | add [next_usage_update], 100 |
1055 | Galkov | 28 | call updatecputimes |
29 | .nocounter: |
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2382 | hidnplayr | 30 | xor ecx, ecx ; send End Of Interrupt signal |
31 | call irq_eoi |
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1055 | Galkov | 32 | btr dword[DONT_SWITCH], 0 |
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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465 | serge | 46 | if 0 |
1055 | Galkov | 47 | ; \begin{Mario79} ; <- must be refractoried, if used... |
48 | cmp [dma_task_switched], 1 |
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49 | jne .find_next_task |
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50 | mov [dma_task_switched], 0 |
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51 | mov ebx, [dma_process] |
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52 | cmp [CURRENT_TASK], ebx |
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53 | je .return |
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54 | mov edi, [dma_slot_ptr] |
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55 | mov [CURRENT_TASK], ebx |
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56 | mov [TASK_BASE], edi |
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57 | jmp @f |
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187 | diamond | 58 | .find_next_task: |
59 | ; \end{Mario79} |
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465 | serge | 60 | end if |
1055 | Galkov | 61 | call find_next_task |
62 | jz .return ; the same task -> skip switch |
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2382 | hidnplayr | 63 | @@: |
64 | mov byte[DONT_SWITCH], 1 |
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1055 | Galkov | 65 | call do_change_task |
66 | .return: |
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67 | popad |
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68 | popfd |
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69 | ret |
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465 | serge | 70 | |
101 | poddubny | 71 | uglobal |
1055 | Galkov | 72 | align 4 |
73 | ; far_jump: |
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74 | ; .offs dd ? |
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75 | ; .sel dw ? |
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76 | context_counter dd 0 ;noname & halyavin |
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77 | next_usage_update dd 0 |
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78 | timer_ticks dd 0 |
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79 | ; prev_slot dd ? |
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80 | ; event_sched dd ? |
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101 | poddubny | 81 | endg |
82 | |||
1055 | Galkov | 83 | align 4 |
101 | poddubny | 84 | update_counters: |
1055 | Galkov | 85 | mov edi, [TASK_BASE] |
86 | rdtsc |
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87 | sub eax, [edi+TASKDATA.counter_add] ; time stamp counter add |
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88 | add [edi+TASKDATA.counter_sum], eax ; counter sum |
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89 | ret |
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90 | align 4 |
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91 | updatecputimes: |
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2382 | hidnplayr | 92 | xor eax, eax |
93 | xchg eax, [idleuse] |
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94 | mov [idleusesec], eax |
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1055 | Galkov | 95 | mov ecx, [TASK_COUNT] |
96 | mov edi, TASK_DATA |
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97 | .newupdate: |
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2382 | hidnplayr | 98 | xor eax, eax |
99 | xchg eax, [edi+TASKDATA.counter_sum] |
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100 | mov [edi+TASKDATA.cpu_usage], eax |
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101 | add edi, 0x20 |
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1055 | Galkov | 102 | loop .newupdate |
103 | ret |
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1 | ha | 104 | |
1055 | Galkov | 105 | align 4 |
101 | poddubny | 106 | find_next_task: |
1055 | Galkov | 107 | ;info: |
108 | ; Find next task to execute |
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109 | ;retval: |
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110 | ; ebx = address of the APPDATA for the selected task (slot-base) |
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111 | ; esi = previous slot-base ([current_slot] at the begin) |
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112 | ; edi = address of the TASKDATA for the selected task |
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113 | ; ZF = 1 if the task is the same |
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114 | ;warning: |
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115 | ; [CURRENT_TASK] = bh , [TASK_BASE] = edi -- as result |
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116 | ; [current_slot] is not set to new value (ebx)!!! |
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117 | ;scratched: eax,ecx |
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118 | call update_counters ; edi := [TASK_BASE] |
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119 | Mov esi, ebx, [current_slot] |
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120 | .loop: |
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2382 | hidnplayr | 121 | cmp bh, [TASK_COUNT] |
1055 | Galkov | 122 | jb @f |
123 | xor bh, bh |
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2382 | hidnplayr | 124 | mov edi, CURRENT_TASK |
125 | @@: |
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126 | inc bh ; ebx += APPDATA.size |
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127 | add edi, 0x20; edi += TASKDATA.size |
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1055 | Galkov | 128 | mov al, [edi+TASKDATA.state] |
129 | test al, al |
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130 | jz .found ; state == 0 |
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131 | cmp al, 5 |
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132 | jne .loop ; state == 1,2,3,4,9 |
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133 | ; state == 5 |
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134 | pushad ; more freedom for [APPDATA.wait_test] |
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135 | call [ebx+APPDATA.wait_test] |
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2382 | hidnplayr | 136 | mov [esp+28], eax |
1055 | Galkov | 137 | popad |
2382 | hidnplayr | 138 | or eax, eax |
1055 | Galkov | 139 | jnz @f |
140 | ; testing for timeout |
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141 | mov ecx, [timer_ticks] |
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142 | sub ecx, [ebx+APPDATA.wait_begin] |
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143 | cmp ecx, [ebx+APPDATA.wait_timeout] |
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144 | jb .loop |
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2382 | hidnplayr | 145 | @@: |
146 | mov [ebx+APPDATA.wait_param], eax ; retval for wait |
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1055 | Galkov | 147 | mov [edi+TASKDATA.state], 0 |
148 | .found: |
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2382 | hidnplayr | 149 | mov [CURRENT_TASK], bh |
150 | mov [TASK_BASE], edi |
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1055 | Galkov | 151 | rdtsc ;call _rdtsc |
2382 | hidnplayr | 152 | mov [edi+TASKDATA.counter_add], eax; for next using update_counters |
1055 | Galkov | 153 | cmp ebx, esi ;esi - previous slot-base |
154 | ret |
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155 | ;TODO: Надо бы убрать использование do_change_task из V86... |
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156 | ; и после этого перенести обработку TASKDATA.counter_add/sum в do_change_task |
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1 | ha | 157 | |
1055 | Galkov | 158 | align 4 |
101 | poddubny | 159 | do_change_task: |
1055 | Galkov | 160 | ;param: |
161 | ; ebx = address of the APPDATA for incoming task (new) |
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162 | ;warning: |
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163 | ; [CURRENT_TASK] and [TASK_BASE] must be changed before (e.g. in find_next_task) |
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164 | ; [current_slot] is the outcoming (old), and set here to a new value (ebx) |
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165 | ;scratched: eax,ecx,esi |
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2382 | hidnplayr | 166 | mov esi, ebx |
167 | xchg esi, [current_slot] |
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1220 | serge | 168 | ; set new stack after saving old |
1055 | Galkov | 169 | mov [esi+APPDATA.saved_esp], esp |
170 | mov esp, [ebx+APPDATA.saved_esp] |
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1220 | serge | 171 | ; set new thread io-map |
1055 | Galkov | 172 | Mov dword [page_tabs+((tss._io_map_0 and -4096) shr 10)],eax,[ebx+APPDATA.io_map] |
173 | Mov dword [page_tabs+((tss._io_map_1 and -4096) shr 10)],eax,[ebx+APPDATA.io_map+4] |
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1220 | serge | 174 | ; set new thread memory-map |
1055 | Galkov | 175 | mov ecx, APPDATA.dir_table |
176 | mov eax, [ebx+ecx] ;offset>0x7F |
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177 | cmp eax, [esi+ecx] ;offset>0x7F |
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178 | je @f |
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179 | mov cr3, eax |
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1220 | serge | 180 | @@: |
181 | ; set tss.esp0 |
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182 | |||
1055 | Galkov | 183 | Mov [tss._esp0],eax,[ebx+APPDATA.saved_esp0] |
1220 | serge | 184 | |
2382 | hidnplayr | 185 | mov edx, [ebx+APPDATA.tls_base] |
186 | cmp edx, [esi+APPDATA.tls_base] |
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187 | je @f |
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1220 | serge | 188 | |
2382 | hidnplayr | 189 | mov [tls_data_l+2], dx |
190 | shr edx, 16 |
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191 | mov [tls_data_l+4], dl |
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192 | mov [tls_data_l+7], dh |
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1220 | serge | 193 | |
2382 | hidnplayr | 194 | mov dx, app_tls |
195 | mov fs, dx |
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1298 | diamond | 196 | @@: |
1220 | serge | 197 | ; set gs selector unconditionally |
1055 | Galkov | 198 | Mov gs,ax,graph_data |
199 | ; set CR0.TS |
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200 | cmp bh, byte[fpu_owner] ;bh == incoming task (new) |
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201 | clts ;clear a task switch flag |
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202 | je @f |
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203 | mov eax, cr0 ;and set it again if the owner |
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204 | or eax, CR0_TS ;of a fpu has changed |
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205 | mov cr0, eax |
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206 | @@: ; set context_counter (only for user pleasure ???) |
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207 | inc [context_counter] ;noname & halyavin |
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208 | ; set debug-registers, if it's necessary |
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209 | test byte[ebx+APPDATA.dbg_state], 1 |
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210 | jz @f |
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211 | xor eax, eax |
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212 | mov dr6, eax |
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2382 | hidnplayr | 213 | lea esi, [ebx+ecx+APPDATA.dbg_regs-APPDATA.dir_table];offset>0x7F |
1055 | Galkov | 214 | cld |
215 | macro lodsReg [reg] { |
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216 | lodsd |
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2382 | hidnplayr | 217 | mov reg, eax |
1055 | Galkov | 218 | } lodsReg dr0, dr1, dr2, dr3, dr7 |
219 | purge lodsReg |
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2382 | hidnplayr | 220 | @@: |
221 | ret |
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1055 | Galkov | 222 | ;end. |
465 | serge | 223 | |
2382 | hidnplayr | 224 | |
225 | |||
226 | struct MUTEX_WAITER |
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227 | list LHEAD |
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228 | task dd ? |
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229 | ends |
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230 | |||
231 | ;void __fastcall mutex_init(struct mutex *lock) |
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232 | |||
233 | align 4 |
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234 | mutex_init: |
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235 | mov [ecx+MUTEX.lhead.next], ecx |
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236 | mov [ecx+MUTEX.lhead.prev], ecx |
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237 | mov [ecx+MUTEX.count], 1 |
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238 | ret |
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239 | |||
240 | |||
241 | ;void __fastcall mutex_lock(struct mutex *lock) |
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242 | |||
243 | align 4 |
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244 | mutex_lock: |
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245 | |||
246 | dec [ecx+MUTEX.count] |
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247 | jns .done |
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248 | |||
249 | pushfd |
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250 | cli |
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251 | |||
252 | sub esp, sizeof.MUTEX_WAITER |
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253 | |||
254 | list_add_tail esp, ecx ;esp= new waiter, ecx= list head |
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255 | |||
256 | mov edx, [TASK_BASE] |
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257 | mov [esp+MUTEX_WAITER.task], edx |
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258 | |||
259 | .forever: |
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260 | |||
261 | mov eax, -1 |
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262 | xchg eax, [ecx+MUTEX.count] |
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263 | dec eax |
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264 | jz @F |
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265 | |||
266 | mov [edx+TASKDATA.state], 1 |
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267 | call change_task |
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268 | jmp .forever |
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269 | @@: |
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270 | mov edx, [esp+MUTEX_WAITER.list.next] |
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271 | mov eax, [esp+MUTEX_WAITER.list.prev] |
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272 | |||
273 | mov [eax+MUTEX_WAITER.list.next], edx |
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274 | mov [edx+MUTEX_WAITER.list.prev], eax |
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275 | cmp [ecx+MUTEX.lhead.next], ecx |
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276 | jne @F |
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277 | |||
278 | mov [ecx+MUTEX.count], 0 |
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279 | @@: |
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280 | add esp, sizeof.MUTEX_WAITER |
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281 | |||
282 | popfd |
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283 | .done: |
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284 | ret |
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285 | |||
286 | ;void __fastcall mutex_unlock(struct mutex *lock) |
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287 | |||
288 | align 4 |
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289 | mutex_unlock: |
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290 | |||
291 | pushfd |
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292 | cli |
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293 | |||
294 | mov eax, [ecx+MUTEX.lhead.next] |
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295 | cmp eax, ecx |
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296 | mov [ecx+MUTEX.count], 1 |
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297 | je @F |
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298 | |||
299 | mov eax, [eax+MUTEX_WAITER.task] |
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300 | mov [eax+TASKDATA.state], 0 |
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301 | @@: |
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302 | popfd |
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303 | ret |
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304 | |||
305 | |||
306 | purge MUTEX_WAITER |
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307 | |||
465 | serge | 308 | if 0 |
2382 | hidnplayr | 309 | |
465 | serge | 310 | struc TIMER |
311 | { |
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312 | .next dd ? |
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313 | .exp_time dd ? |
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314 | .func dd ? |
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1055 | Galkov | 315 | .arg dd ? |
465 | serge | 316 | } |
317 | |||
1276 | Lrz | 318 | |
1055 | Galkov | 319 | MAX_PROIRITY 0 ; highest, used for kernel tasks |
320 | MAX_USER_PRIORITY 0 ; highest priority for user processes |
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321 | USER_PRIORITY 7 ; default (should correspond to nice 0) |
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322 | MIN_USER_PRIORITY 14 ; minimum priority for user processes |
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323 | IDLE_PRIORITY 15 ; lowest, only IDLE process goes here |
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324 | NR_SCHED_QUEUES 16 ; MUST equal IDLE_PRIORYTY + 1 |
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465 | serge | 325 | |
1276 | Lrz | 326 | uglobal |
465 | serge | 327 | rdy_head rd 16 |
1276 | Lrz | 328 | endg |
465 | serge | 329 | |
330 | align 4 |
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331 | pick_task: |
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332 | |||
2382 | hidnplayr | 333 | xor eax, eax |
1055 | Galkov | 334 | .pick: |
2382 | hidnplayr | 335 | mov ebx, [rdy_head+eax*4] |
336 | test ebx, ebx |
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337 | jz .next |
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465 | serge | 338 | |
2382 | hidnplayr | 339 | mov [next_task], ebx |
340 | test [ebx+flags.billable] |
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341 | jz @F |
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342 | mov [bill_task], ebx |
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1055 | Galkov | 343 | @@: |
2382 | hidnplayr | 344 | ret |
1055 | Galkov | 345 | .next: |
2382 | hidnplayr | 346 | inc eax |
347 | jmp .pick |
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465 | serge | 348 | |
349 | ; param |
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350 | ; eax= task |
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351 | ; |
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352 | ; retval |
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353 | ; eax= task |
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354 | ; ebx= queue |
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355 | ; ecx= front if 1 or back if 0 |
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356 | align 4 |
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357 | shed: |
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2382 | hidnplayr | 358 | cmp [eax+.tics_left], 0;signed compare |
359 | mov ebx, [eax+.priority] |
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360 | setg ecx |
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361 | jg @F |
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465 | serge | 362 | |
2382 | hidnplayr | 363 | mov edx, [eax+.tics_quantum] |
364 | mov [eax+.ticks_left], edx |
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365 | cmp ebx, (IDLE_PRIORITY-1) |
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366 | je @F |
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367 | inc ebx |
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1055 | Galkov | 368 | @@: |
2382 | hidnplayr | 369 | ret |
465 | serge | 370 | |
371 | ; param |
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372 | ; eax= task |
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373 | align 4 |
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374 | enqueue: |
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2382 | hidnplayr | 375 | call shed;eax |
376 | cmp [rdy_head+ebx*4], 0 |
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377 | jnz @F |
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465 | serge | 378 | |
2382 | hidnplayr | 379 | mov [rdy_head+ebx*4], eax |
380 | mov [rdy_tail+ebx*4], eax |
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381 | mov [eax+.next_ready], 0 |
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382 | jmp .pick |
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1055 | Galkov | 383 | @@: |
2382 | hidnplayr | 384 | test ecx, ecx |
385 | jz .back |
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465 | serge | 386 | |
2382 | hidnplayr | 387 | mov ecx, [rdy_head+ebx*4] |
388 | mov [eax+.next_ready], ecx |
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389 | mov [rdy_head+ebx*4], eax |
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390 | jmp .pick |
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1055 | Galkov | 391 | .back: |
2382 | hidnplayr | 392 | mov ecx, [rdy_tail+ebx*4] |
393 | mov [ecx+.next_ready], eax |
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394 | mov [rdy_tail+ebx*4], eax |
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395 | mov [eax+.next_ready], 0 |
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1055 | Galkov | 396 | .pick: |
2382 | hidnplayr | 397 | call pick_proc;select next task |
398 | ret |
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465 | serge | 399 | |
400 | end if->---><---><<---> |