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4429 | Serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;; |
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4 | ;; Distributed under terms of the GNU General Public License ;; |
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5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
8 | IRQ_RESERVED equ 24 |
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9 | |||
10 | IRQ_POOL_SIZE equ 48 |
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11 | |||
12 | uglobal |
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13 | |||
14 | align 16 |
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15 | irqh_tab rd sizeof.LHEAD * IRQ_RESERVED / 4 |
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16 | |||
17 | irqh_pool rd sizeof.IRQH * IRQ_POOL_SIZE /4 |
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18 | next_irqh rd 1 |
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19 | |||
20 | irq_active_set rd 1 |
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21 | irq_failed rd IRQ_RESERVED |
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22 | |||
23 | endg |
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24 | |||
25 | align 4 |
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26 | init_irqs: |
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27 | |||
28 | mov ecx, IRQ_RESERVED |
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29 | mov edi, irqh_tab |
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30 | @@: |
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31 | mov eax, edi |
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32 | stosd |
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33 | stosd |
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34 | loop @B |
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35 | |||
36 | mov ecx, IRQ_POOL_SIZE-1 |
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37 | mov eax, irqh_pool+sizeof.IRQH |
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38 | mov [next_irqh], irqh_pool |
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39 | @@: |
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40 | mov [eax-sizeof.IRQH], eax |
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41 | add eax, sizeof.IRQH |
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42 | loop @B |
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43 | |||
44 | mov [eax-sizeof.IRQH], dword 0 |
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45 | ret |
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46 | |||
47 | |||
48 | align 4 |
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49 | proc attach_int_handler stdcall, irq:dword, handler:dword, user_data:dword |
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50 | locals |
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51 | .irqh dd ? |
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52 | endl |
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53 | |||
54 | DEBUGF 1, "K : Attach Interrupt %d Handler %x\n", [irq], [handler] |
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55 | |||
56 | and [.irqh], 0 |
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57 | |||
58 | push ebx |
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59 | |||
60 | mov ebx, [irq] ;irq num |
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61 | test ebx, ebx |
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62 | jz .err |
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63 | |||
64 | cmp ebx, IRQ_RESERVED |
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65 | jae .err |
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66 | |||
67 | mov edx, [handler] |
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68 | test edx, edx |
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69 | jz .err |
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70 | |||
71 | spin_lock_irqsave IrqsList |
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72 | |||
73 | ;allocate handler |
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74 | |||
75 | mov ecx, [next_irqh] |
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76 | test ecx, ecx |
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77 | jz .fail |
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78 | |||
79 | mov eax, [ecx] |
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80 | mov [next_irqh], eax |
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81 | mov [.irqh], ecx |
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82 | |||
83 | mov [irq_failed+ebx*4], 0;clear counter |
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84 | |||
85 | mov eax, [user_data] |
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86 | mov [ecx+IRQH.handler], edx |
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87 | mov [ecx+IRQH.data], eax |
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88 | and [ecx+IRQH.num_ints], 0 |
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89 | |||
90 | lea edx, [irqh_tab+ebx*8] |
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91 | list_add_tail ecx, edx ;clobber eax |
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92 | stdcall enable_irq, ebx |
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93 | |||
94 | .fail: |
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95 | spin_unlock_irqrestore IrqsList |
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96 | .err: |
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97 | pop ebx |
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98 | mov eax, [.irqh] |
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99 | ret |
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100 | |||
101 | endp |
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102 | |||
103 | if 0 |
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104 | align 4 |
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105 | proc get_int_handler stdcall, irq:dword |
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106 | |||
107 | mov eax, [irq] |
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108 | cmp eax, 15 |
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109 | ja .fail |
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110 | mov eax, [irq_tab + 4 * eax] |
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111 | ret |
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112 | .fail: |
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113 | xor eax, eax |
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114 | ret |
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115 | endp |
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116 | end if |
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117 | |||
118 | |||
119 | align 4 |
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120 | proc detach_int_handler |
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121 | |||
122 | ret |
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123 | endp |
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124 | |||
125 | |||
126 | macro irq_serv_h [num] { |
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127 | forward |
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128 | align 4 |
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129 | .irq_#num : |
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130 | push num |
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131 | jmp .main |
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132 | } |
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133 | |||
134 | align 16 |
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135 | irq_serv: |
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136 | |||
137 | ; .irq_1: |
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138 | ; push 1 |
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139 | ; jmp .main |
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140 | ; etc... |
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141 | |||
142 | irq_serv_h 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15 |
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143 | irq_serv_h 16, 17, 18, 19, 20, 21, 22, 23 |
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144 | |||
145 | purge irq_serv_h |
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146 | |||
147 | align 16 |
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148 | .main: |
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149 | save_ring3_context |
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150 | |||
151 | mov ebp, [esp + 32] |
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152 | mov bx, app_data;os_data |
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153 | mov ds, bx |
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154 | mov es, bx |
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155 | |||
156 | cmp [v86_irqhooks+ebp*8], 0 |
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157 | jnz v86_irq |
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158 | |||
159 | bts [irq_active_set], ebp |
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160 | |||
161 | lea esi, [irqh_tab+ebp*8] ; esi= list head |
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162 | mov ebx, esi |
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163 | .next: |
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164 | mov ebx, [ebx+IRQH.list.next]; ebx= irqh pointer |
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165 | cmp ebx, esi |
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166 | je .done |
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167 | |||
168 | push ebx ; FIX THIS |
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169 | push edi |
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170 | push esi |
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171 | |||
172 | push [ebx+IRQH.data] |
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173 | call [ebx+IRQH.handler] |
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174 | pop ecx |
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175 | |||
176 | pop esi |
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177 | pop edi |
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178 | pop ebx |
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179 | |||
180 | test eax, eax |
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181 | jz .next |
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182 | |||
183 | inc [ebx+IRQH.num_ints] |
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184 | btr [irq_active_set], ebp |
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185 | jmp .next |
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186 | |||
187 | .done: |
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188 | btr [irq_active_set], ebp |
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189 | jnc .exit |
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190 | |||
191 | ; There is at least one configuration with one device which generates IRQ |
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192 | ; that is not the same as it should be according to PCI config space. |
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193 | ; For that device, the handler is registered at wrong IRQ. |
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194 | ; As a workaround, when nobody acknowledges the generated IRQ, |
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195 | ; try to ask all other registered handlers; if some handler acknowledges |
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196 | ; the IRQ this time, relink it to the current IRQ list. |
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197 | ; To make this more reliable, for every handler keep number of times |
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198 | ; that it has acknowledged an IRQ, and assume that handlers with at least one |
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199 | ; acknowledged IRQ are registered properly. |
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200 | ; Note: this still isn't 100% correct, because two IRQs can fire simultaneously, |
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201 | ; the better way would be to find the correct IRQ, but I don't know how to do |
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202 | ; this in that case. |
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203 | push ebp |
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204 | xor ebp, ebp |
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205 | .try_other_irqs: |
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206 | cmp ebp, [esp] |
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207 | jz .try_next_irq |
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208 | cmp ebp, 1 |
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209 | jz .try_next_irq |
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210 | cmp ebp, 6 |
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211 | jz .try_next_irq |
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212 | cmp ebp, 12 |
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213 | jz .try_next_irq |
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214 | cmp ebp, 14 |
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215 | jz .try_next_irq |
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216 | cmp ebp, 15 |
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217 | jz .try_next_irq |
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218 | lea esi, [irqh_tab+ebp*8] |
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219 | mov ebx, esi |
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220 | .try_next_handler: |
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221 | mov ebx, [ebx+IRQH.list.next] |
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222 | cmp ebx, esi |
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223 | je .try_next_irq |
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224 | cmp [ebx+IRQH.num_ints], 0 |
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225 | jne .try_next_handler |
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226 | ; keyboard handler acknowledges everything |
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227 | push [ebx+IRQH.data] |
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228 | call [ebx+IRQH.handler] |
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229 | pop ecx |
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230 | test eax, eax |
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231 | jz .try_next_handler |
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232 | |||
233 | .found_in_wrong_list: |
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234 | DEBUGF 1,'K : warning: relinking handler from IRQ%d to IRQ%d\n',\ |
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235 | ebp, [esp] |
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236 | pop ebp |
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237 | spin_lock_irqsave IrqsList |
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238 | list_del ebx |
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239 | lea edx, [irqh_tab+ebp*8] |
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240 | list_add_tail ebx, edx |
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241 | spin_unlock_irqrestore IrqsList |
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242 | jmp .exit |
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243 | |||
244 | .try_next_irq: |
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245 | inc ebp |
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246 | cmp ebp, 16 |
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247 | jb .try_other_irqs |
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248 | pop ebp |
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249 | |||
250 | .fail: |
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251 | inc [irq_failed+ebp*4] |
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252 | .exit: |
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253 | |||
254 | mov ecx, ebp |
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255 | call irq_eoi |
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256 | |||
257 | ; IRQ handler could make some kernel thread ready; reschedule |
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258 | mov bl, SCHEDULE_HIGHER_PRIORITY |
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259 | call find_next_task |
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260 | jz .return ; if there is only one running process |
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261 | call do_change_task |
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262 | .return: |
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263 | restore_ring3_context |
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264 | add esp, 4 |
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265 | iret |
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266 | |||
267 | align 4 |
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268 | irqD: |
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269 | push eax |
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270 | push ecx |
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271 | xor eax, eax |
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272 | out 0xf0, al |
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273 | mov cl, 13 |
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274 | call irq_eoi |
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275 | pop ecx |
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276 | pop eax |
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277 | iret |
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278 |