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Rev | Author | Line No. | Line |
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161 | diamond | 1 | ; Low-level driver for HDD access |
2 | ; DMA support by Mario79 |
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160 | diamond | 3 | |
4 | ;************************************************************************** |
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5 | ; |
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6 | ; 0x600008 - first entry in cache list |
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7 | ; |
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8 | ; +0 - lba sector |
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9 | ; +4 - state of cache sector |
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10 | ; 0 = empty |
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11 | ; 1 = used for read ( same as in hd ) |
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12 | ; 2 = used for write ( differs from hd ) |
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13 | ; |
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14 | ; +65536 - cache entries |
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15 | ; |
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16 | ;************************************************************************** |
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17 | |||
18 | align 4 |
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19 | hd_read: |
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20 | ;----------------------------------------------------------- |
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21 | ; input : eax = block to read |
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22 | ; ebx = destination |
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23 | ;----------------------------------------------------------- |
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24 | push ecx esi edi ; scan cache |
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25 | |||
26 | mov ecx,cache_max ; entries in cache |
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27 | mov esi,0x600000+8 |
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28 | mov edi,1 |
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29 | |||
30 | hdreadcache: |
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31 | |||
32 | cmp dword [esi+4],0 ; empty |
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33 | je nohdcache |
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34 | |||
35 | cmp [esi],eax ; correct sector |
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36 | je yeshdcache |
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37 | |||
38 | nohdcache: |
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39 | |||
40 | add esi,8 |
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41 | inc edi |
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42 | dec ecx |
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43 | jnz hdreadcache |
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44 | |||
45 | call find_empty_slot ; ret in edi |
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46 | cmp [hd_error],0 |
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47 | jne return_01 |
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48 | cmp [dma_hdd], 1 |
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49 | jnz .nodma |
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50 | call hd_read_dma |
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51 | jmp @f |
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52 | .nodma: |
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53 | call hd_read_pio |
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54 | @@: |
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55 | |||
56 | lea esi,[edi*8+0x600000] |
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57 | mov [esi],eax ; sector number |
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58 | mov dword [esi+4],1 ; hd read - mark as same as in hd |
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59 | |||
60 | yeshdcache: |
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61 | |||
62 | mov esi,edi |
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63 | shl esi,9 |
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64 | add esi,0x600000+65536 |
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65 | mov edi,ebx |
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66 | mov ecx,512/4 |
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67 | cld |
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68 | rep movsd ; move data |
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69 | return_01: |
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70 | pop edi esi ecx |
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71 | ret |
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72 | |||
73 | align 4 |
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74 | hd_read_pio: |
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75 | push eax edx |
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76 | |||
77 | call disable_ide_int |
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78 | |||
79 | call wait_for_hd_idle |
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80 | cmp [hd_error],0 |
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81 | jne hd_read_error |
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82 | |||
83 | ; cli |
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84 | xor eax,eax |
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85 | mov edx,[hdbase] |
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86 | inc edx |
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87 | out dx,al ; ATAFeatures регистр "особенностей" |
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88 | inc edx |
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89 | inc eax |
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90 | out dx,al ; ATASectorCount счётчик секторов |
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91 | inc edx |
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92 | mov eax,[esp+4] |
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93 | out dx,al ; ATASectorNumber регистр номера сектора |
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94 | shr eax,8 |
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95 | inc edx |
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96 | out dx,al ; ATACylinder номер цилиндра (младший байт) |
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97 | shr eax,8 |
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98 | inc edx |
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99 | out dx,al ; номер цилиндра (старший байт) |
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100 | shr eax,8 |
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101 | inc edx |
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102 | and al,1+2+4+8 |
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103 | add al,byte [hdid] |
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104 | add al,128+64+32 |
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105 | out dx,al ; номер головки/номер диска |
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106 | inc edx |
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107 | mov al,20h |
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108 | out dx,al ; ATACommand регистр команд |
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109 | ; sti |
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110 | |||
111 | call wait_for_sector_buffer |
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112 | |||
113 | cmp [hd_error],0 |
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114 | jne hd_read_error |
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115 | |||
116 | ; cli |
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117 | push edi |
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118 | shl edi,9 |
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119 | add edi,0x600000+65536 |
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120 | mov ecx,256 |
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121 | mov edx,[hdbase] |
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122 | cld |
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123 | rep insw |
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124 | pop edi |
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125 | ; sti |
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126 | |||
127 | call enable_ide_int |
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128 | |||
129 | pop edx eax |
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130 | ret |
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131 | |||
132 | disable_ide_int: |
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162 | diamond | 133 | ; mov edx,[hdbase] |
134 | ; add edx,0x206 |
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135 | ; mov al,2 |
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136 | ; out dx,al |
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137 | cli |
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160 | diamond | 138 | ret |
139 | |||
140 | enable_ide_int: |
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162 | diamond | 141 | ; mov edx,[hdbase] |
142 | ; add edx,0x206 |
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143 | ; mov al,0 |
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144 | ; out dx,al |
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145 | sti |
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160 | diamond | 146 | ret |
147 | |||
148 | align 4 |
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149 | hd_write: |
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150 | ;----------------------------------------------------------- |
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151 | ; input : eax = block |
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152 | ; ebx = pointer to memory |
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153 | ;----------------------------------------------------------- |
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154 | push ecx esi edi |
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155 | |||
156 | ; check if the cache already has the sector and overwrite it |
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157 | |||
158 | mov ecx,cache_max |
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159 | mov esi,0x600000+8 |
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160 | mov edi,1 |
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161 | |||
162 | hdwritecache: |
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163 | |||
164 | cmp dword [esi+4],0 ; if cache slot is empty |
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165 | je not_in_cache_write |
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166 | |||
167 | cmp [esi],eax ; if the slot has the sector |
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168 | je yes_in_cache_write |
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169 | |||
170 | not_in_cache_write: |
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171 | |||
172 | add esi,8 |
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173 | inc edi |
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174 | dec ecx |
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175 | jnz hdwritecache |
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176 | |||
177 | ; sector not found in cache |
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178 | ; write the block to a new location |
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179 | |||
180 | call find_empty_slot ; ret in edi |
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181 | cmp [hd_error],0 |
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182 | jne hd_write_access_denied |
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183 | |||
184 | lea esi,[edi*8+0x600000] |
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185 | mov [esi],eax ; sector number |
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186 | |||
187 | yes_in_cache_write: |
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188 | |||
189 | mov dword [esi+4],2 ; write - differs from hd |
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190 | |||
191 | shl edi,9 |
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192 | add edi,0x600000+65536 |
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193 | mov esi,ebx |
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194 | mov ecx,512/4 |
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195 | cld |
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196 | rep movsd ; move data |
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197 | hd_write_access_denied: |
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198 | pop edi esi ecx |
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199 | ret |
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200 | |||
201 | |||
202 | write_cache: |
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203 | ;----------------------------------------------------------- |
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204 | ; write all changed sectors to disk |
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205 | ;----------------------------------------------------------- |
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206 | push eax ecx edx esi edi |
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207 | |||
208 | ; write difference ( 2 ) from cache to hd |
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209 | |||
210 | mov ecx,cache_max |
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211 | mov esi,0x600000+8 |
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212 | mov edi,1 |
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213 | |||
214 | write_cache_more: |
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215 | |||
216 | cmp dword [esi+4],2 ; if cache slot is not different |
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217 | jne .write_chain |
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218 | |||
219 | mov dword [esi+4],1 ; same as in hd |
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220 | mov eax,[esi] ; eax = sector to write |
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221 | |||
222 | cmp eax,[PARTITION_START] |
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223 | jb danger |
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224 | cmp eax,[PARTITION_END] |
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225 | ja danger |
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226 | |||
227 | cmp [dma_hdd], 1 |
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228 | jnz .nodma |
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229 | ; Объединяем запись цепочки последовательных секторов в одно обращение к диску |
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230 | cmp ecx, 1 |
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231 | jz .nonext |
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232 | cmp dword [esi+8+4], 2 |
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233 | jnz .nonext |
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234 | push eax |
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235 | inc eax |
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236 | cmp eax, [esi+8] |
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237 | pop eax |
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238 | jnz .nonext |
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239 | cmp [cache_chain_started], 1 |
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240 | jz @f |
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241 | mov [cache_chain_started], 1 |
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242 | mov [cache_chain_size], 0 |
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243 | mov [cache_chain_pos], edi |
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244 | mov [cache_chain_ptr], esi |
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245 | @@: |
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246 | inc [cache_chain_size] |
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247 | cmp [cache_chain_size], 64 |
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248 | jnz .continue |
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249 | jmp .write_chain |
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250 | .nonext: |
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251 | call flush_cache_chain |
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252 | mov [cache_chain_size], 1 |
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253 | mov [cache_chain_ptr], esi |
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254 | call write_cache_sector |
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255 | jmp .continue |
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256 | .nodma: |
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257 | call cache_write_pio |
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258 | .write_chain: |
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259 | call flush_cache_chain |
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260 | |||
261 | .continue: |
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262 | danger: |
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263 | |||
264 | add esi,8 |
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265 | inc edi |
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266 | dec ecx |
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267 | jnz write_cache_more |
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268 | call flush_cache_chain |
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269 | return_02: |
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270 | pop edi esi edx ecx eax |
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271 | ret |
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272 | |||
273 | flush_cache_chain: |
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274 | cmp [cache_chain_started], 0 |
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275 | jz @f |
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276 | call write_cache_chain |
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277 | mov [cache_chain_started], 0 |
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278 | @@: |
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279 | ret |
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280 | |||
281 | align 4 |
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282 | cache_write_pio: |
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283 | call disable_ide_int |
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284 | |||
285 | call wait_for_hd_idle |
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286 | cmp [hd_error],0 |
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287 | jne hd_write_error |
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288 | |||
289 | ; cli |
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290 | xor eax,eax |
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291 | mov edx,[hdbase] |
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292 | inc edx |
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293 | out dx,al |
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294 | inc edx |
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295 | inc eax |
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296 | out dx,al |
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297 | inc edx |
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298 | mov eax,[esi] ; eax = sector to write |
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299 | out dx,al |
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300 | shr eax,8 |
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301 | inc edx |
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302 | out dx,al |
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303 | shr eax,8 |
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304 | inc edx |
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305 | out dx,al |
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306 | shr eax,8 |
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307 | inc edx |
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308 | and al,1+2+4+8 |
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309 | add al,byte [hdid] |
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310 | add al,128+64+32 |
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311 | out dx,al |
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312 | inc edx |
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313 | mov al,30h |
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314 | out dx,al |
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315 | ; sti |
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316 | |||
317 | call wait_for_sector_buffer |
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318 | |||
319 | cmp [hd_error],0 |
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320 | jne hd_write_error |
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321 | |||
322 | push ecx esi |
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323 | |||
324 | ; cli |
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325 | mov esi,edi |
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326 | shl esi,9 |
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327 | add esi,0x600000+65536 ; esi = from memory position |
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328 | mov ecx,256 |
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329 | mov edx,[hdbase] |
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330 | cld |
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331 | rep outsw |
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332 | ; sti |
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333 | |||
334 | call enable_ide_int |
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335 | pop esi ecx |
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336 | |||
337 | ret |
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338 | |||
339 | align 4 |
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340 | find_empty_slot: |
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341 | ;----------------------------------------------------------- |
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342 | ; find empty or read slot, flush cache if next 10% is used by write |
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343 | ; output : edi = cache slot |
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344 | ;----------------------------------------------------------- |
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345 | ; push ecx esi |
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346 | |||
347 | search_again: |
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348 | |||
349 | mov ecx,cache_max*10/100 |
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350 | mov edi,[cache_search_start] |
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351 | |||
352 | search_for_empty: |
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353 | |||
354 | inc edi |
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355 | cmp edi,cache_max |
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356 | jbe inside_cache |
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357 | mov edi,1 |
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358 | |||
359 | inside_cache: |
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360 | |||
361 | cmp dword [edi*8+0x600000+4],2 ; get cache slot info |
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362 | jb found_slot ; it's empty or read |
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363 | dec ecx |
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364 | jnz search_for_empty |
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365 | |||
366 | call write_cache ; no empty slots found, write all |
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367 | cmp [hd_error],0 |
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368 | jne found_slot_access_denied |
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369 | |||
370 | jmp search_again ; and start again |
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371 | |||
372 | found_slot: |
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373 | |||
374 | mov [cache_search_start],edi |
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375 | found_slot_access_denied: |
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376 | ret |
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377 | |||
378 | align 4 |
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379 | clear_hd_cache: |
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380 | |||
381 | push eax ecx edi |
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382 | mov edi,0x600000 |
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383 | mov ecx,16384 |
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384 | xor eax,eax |
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385 | cld |
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386 | rep stosd ; clear hd cache with 0 |
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387 | mov [cache_search_start],eax |
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388 | mov [fat_in_cache],-1 |
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389 | mov [fat_change],0 |
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390 | pop edi ecx eax |
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391 | ret |
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392 | |||
393 | save_hd_wait_timeout: |
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394 | |||
395 | push eax |
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396 | mov eax,[timer_ticks];[0xfdf0] |
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397 | add eax,300 ; 3 sec timeout |
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398 | mov [hd_wait_timeout],eax |
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399 | pop eax |
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400 | ret |
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401 | |||
402 | align 4 |
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403 | check_hd_wait_timeout: |
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404 | |||
405 | push eax |
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406 | mov eax,[hd_wait_timeout] |
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407 | cmp [timer_ticks], eax ;[0xfdf0],eax |
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408 | jg hd_timeout_error |
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409 | pop eax |
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410 | mov [hd_error],0 |
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411 | ret |
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412 | |||
413 | iglobal |
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414 | hd_timeout_str db 'K : FS - HD timeout',13,10,0 |
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415 | hd_read_str db 'K : FS - HD read error',13,10,0 |
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416 | hd_write_str db 'K : FS - HD write error',13,10,0 |
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417 | hd_lba_str db 'K : FS - HD LBA error',13,10,0 |
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418 | endg |
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419 | |||
420 | hd_timeout_error: |
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421 | |||
422 | call clear_hd_cache |
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423 | call clear_application_table_status |
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424 | mov esi,hd_timeout_str |
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425 | call sys_msg_board_str |
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426 | ; jmp $ |
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427 | mov [hd_error],1 |
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428 | pop eax |
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429 | ret |
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430 | |||
431 | hd_read_error: |
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432 | |||
433 | call clear_hd_cache |
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434 | call clear_application_table_status |
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435 | mov esi,hd_read_str |
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436 | call sys_msg_board_str |
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437 | pop edx eax |
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161 | diamond | 438 | ret |
160 | diamond | 439 | |
440 | hd_write_error: |
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441 | |||
442 | call clear_hd_cache |
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443 | call clear_application_table_status |
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444 | mov esi,hd_write_str |
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445 | call sys_msg_board_str |
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161 | diamond | 446 | ret |
160 | diamond | 447 | |
448 | hd_write_error_dma: |
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449 | call clear_hd_cache |
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450 | call clear_application_table_status |
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451 | mov esi, hd_write_str |
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452 | call sys_msg_board_str |
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453 | pop esi |
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161 | diamond | 454 | ret |
160 | diamond | 455 | |
456 | hd_lba_error: |
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457 | call clear_hd_cache |
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458 | call clear_application_table_status |
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459 | mov esi,hd_lba_str |
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460 | call sys_msg_board_str |
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461 | jmp LBA_read_ret |
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462 | |||
463 | |||
464 | align 4 |
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465 | wait_for_hd_idle: |
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466 | |||
467 | push eax edx |
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468 | |||
469 | call save_hd_wait_timeout |
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470 | |||
471 | mov edx,[hdbase] |
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472 | add edx,0x7 |
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473 | |||
474 | wfhil1: |
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475 | |||
476 | call check_hd_wait_timeout |
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477 | cmp [hd_error],0 |
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478 | jne @f |
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479 | |||
480 | in al,dx |
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481 | test al,128 |
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482 | jnz wfhil1 |
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483 | |||
484 | @@: |
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485 | |||
486 | pop edx eax |
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487 | ret |
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488 | |||
489 | |||
490 | align 4 |
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491 | wait_for_sector_buffer: |
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492 | |||
493 | push eax edx |
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494 | |||
495 | mov edx,[hdbase] |
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496 | add edx,0x7 |
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497 | |||
498 | call save_hd_wait_timeout |
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499 | |||
500 | hdwait_sbuf: ; wait for sector buffer to be ready |
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501 | |||
502 | call check_hd_wait_timeout |
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503 | cmp [hd_error],0 |
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504 | jne @f |
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505 | |||
506 | in al,dx |
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507 | test al,8 |
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508 | jz hdwait_sbuf |
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509 | |||
510 | mov [hd_error],0 |
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511 | |||
512 | cmp [hd_setup],1 ; do not mark error for setup request |
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513 | je buf_wait_ok |
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514 | |||
515 | test al,1 ; previous command ended up with an error |
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516 | jz buf_wait_ok |
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517 | @@: |
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518 | mov [hd_error],1 |
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519 | |||
520 | buf_wait_ok: |
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521 | |||
522 | pop edx eax |
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523 | ret |
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524 | |||
161 | diamond | 525 | ; \begin{Mario79} |
160 | diamond | 526 | align 4 |
527 | wait_for_sector_dma_ide0: |
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528 | push eax |
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529 | push edx |
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530 | call save_hd_wait_timeout |
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531 | .wait: |
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532 | call change_task |
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533 | cmp [irq14_func], hdd_irq14 |
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534 | jnz .done |
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535 | call check_hd_wait_timeout |
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536 | cmp [hd_error], 0 |
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537 | jz .wait |
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538 | mov [irq14_func], hdd_irq_null |
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539 | mov dx, [IDEContrRegsBaseAddr] |
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540 | mov al, 0 |
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541 | out dx, al |
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542 | .done: |
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543 | pop edx |
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544 | pop eax |
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545 | ret |
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546 | |||
547 | align 4 |
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548 | wait_for_sector_dma_ide1: |
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549 | push eax |
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550 | push edx |
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551 | call save_hd_wait_timeout |
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552 | .wait: |
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553 | call change_task |
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554 | cmp [irq15_func], hdd_irq15 |
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555 | jnz .done |
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556 | call check_hd_wait_timeout |
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557 | cmp [hd_error], 0 |
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558 | jz .wait |
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559 | mov [irq15_func], hdd_irq_null |
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560 | mov dx, [IDEContrRegsBaseAddr] |
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561 | add dx, 8 |
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562 | mov al, 0 |
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563 | out dx, al |
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564 | .done: |
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565 | pop edx |
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566 | pop eax |
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567 | ret |
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568 | |||
569 | iglobal |
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570 | align 4 |
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571 | ; note that IDE descriptor table must be 4-byte aligned and do not cross 4K boundary |
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572 | IDE_descriptor_table: |
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573 | dd 284000h |
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574 | dw 2000h |
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575 | dw 8000h |
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576 | |||
577 | dma_cur_sector dd not 40h |
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578 | irq14_func dd hdd_irq_null |
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579 | irq15_func dd hdd_irq_null |
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580 | endg |
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581 | |||
582 | uglobal |
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583 | ; all uglobals are zeroed at boot |
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584 | dma_process dd 0 |
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585 | dma_slot_ptr dd 0 |
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586 | cache_chain_pos dd 0 |
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587 | cache_chain_ptr dd 0 |
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588 | cache_chain_size db 0 |
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589 | cache_chain_started db 0 |
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590 | dma_task_switched db 0 |
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591 | dma_hdd db 0 |
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592 | endg |
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593 | |||
594 | align 4 |
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595 | hdd_irq14: |
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596 | pushfd |
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597 | cli |
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598 | pushad |
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599 | mov [irq14_func], hdd_irq_null |
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600 | mov dx, [IDEContrRegsBaseAddr] |
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601 | mov al, 0 |
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602 | out dx, al |
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603 | call update_counters |
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604 | mov ebx, [dma_process] |
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605 | cmp [0x3000], ebx |
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606 | jz .noswitch |
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607 | mov [dma_task_switched], 1 |
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608 | mov edi, [dma_slot_ptr] |
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609 | mov eax, [0x3000] |
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610 | mov [dma_process], eax |
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611 | mov eax, [0x3010] |
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612 | mov [dma_slot_ptr], eax |
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613 | mov [0x3000], ebx |
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614 | mov [0x3010], edi |
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615 | mov byte [0xFFFF], 1 |
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616 | call do_change_task |
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617 | .noswitch: |
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618 | popad |
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619 | popfd |
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620 | align 4 |
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621 | hdd_irq_null: |
||
622 | ret |
||
623 | |||
624 | align 4 |
||
625 | hdd_irq15: |
||
626 | pushfd |
||
627 | cli |
||
628 | pushad |
||
629 | mov [irq15_func], hdd_irq_null |
||
630 | mov dx, [IDEContrRegsBaseAddr] |
||
631 | add dx, 8 |
||
632 | mov al, 0 |
||
633 | out dx, al |
||
634 | call update_counters |
||
635 | mov ebx, [dma_process] |
||
636 | cmp [0x3000], ebx |
||
637 | jz .noswitch |
||
638 | mov [dma_task_switched], 1 |
||
639 | mov edi, [dma_slot_ptr] |
||
640 | mov eax, [0x3000] |
||
641 | mov [dma_process], eax |
||
642 | mov eax, [0x3010] |
||
643 | mov [dma_slot_ptr], eax |
||
644 | mov [0x3000], ebx |
||
645 | mov [0x3010], edi |
||
646 | mov byte [0xFFFF], 1 |
||
647 | call do_change_task |
||
648 | .noswitch: |
||
649 | popad |
||
650 | popfd |
||
651 | ret |
||
652 | |||
653 | align 4 |
||
654 | hd_read_dma: |
||
655 | push eax |
||
656 | push edx |
||
657 | mov edx, [dma_cur_sector] |
||
658 | cmp eax, edx |
||
659 | jb .notread |
||
660 | add edx, 15 |
||
661 | cmp [esp+4], edx |
||
662 | ja .notread |
||
663 | mov eax, [esp+4] |
||
664 | sub eax, [dma_cur_sector] |
||
665 | shl eax, 9 |
||
666 | add eax, 0x284000 |
||
667 | push ecx esi edi |
||
668 | mov esi, eax |
||
669 | shl edi, 9 |
||
670 | add edi, 0x610000 |
||
671 | mov ecx, 512/4 |
||
672 | cld |
||
673 | rep movsd |
||
674 | pop edi esi ecx |
||
675 | pop edx |
||
676 | pop eax |
||
677 | ret |
||
678 | .notread: |
||
679 | mov eax, IDE_descriptor_table |
||
680 | mov dword [eax], 0x284000 |
||
681 | mov word [eax+4], 0x2000 |
||
682 | mov dx, [IDEContrRegsBaseAddr] |
||
683 | cmp [hdbase], 0x1F0 |
||
684 | jz @f |
||
685 | add edx, 8 |
||
686 | @@: |
||
687 | push edx |
||
688 | add edx, 4 |
||
689 | out dx, eax |
||
690 | pop edx |
||
691 | mov al, 0 |
||
692 | out dx, al |
||
693 | add edx, 2 |
||
694 | mov al, 6 |
||
695 | out dx, al |
||
696 | call wait_for_hd_idle |
||
697 | cmp [hd_error], 0 |
||
698 | jnz hd_read_error |
||
699 | call disable_ide_int |
||
700 | xor eax, eax |
||
701 | mov edx, [hdbase] |
||
702 | inc edx |
||
703 | out dx, al |
||
704 | inc edx |
||
705 | mov eax, 10h |
||
706 | out dx, al |
||
707 | inc edx |
||
708 | mov eax, [esp+4] |
||
709 | out dx, al |
||
710 | shr eax, 8 |
||
711 | inc edx |
||
712 | out dx, al |
||
713 | shr eax, 8 |
||
714 | inc edx |
||
715 | out dx, al |
||
716 | shr eax, 8 |
||
717 | inc edx |
||
718 | and al, 0xF |
||
719 | add al, byte [hdid] |
||
720 | add al, 11100000b |
||
721 | out dx, al |
||
722 | inc edx |
||
723 | mov al, 0xC8 |
||
724 | out dx, al |
||
725 | mov dx, [IDEContrRegsBaseAddr] |
||
726 | cmp [hdbase], 0x1F0 |
||
727 | jz @f |
||
728 | add dx, 8 |
||
729 | @@: |
||
730 | mov al, 9 |
||
731 | out dx, al |
||
732 | mov eax, [0x3000] |
||
733 | mov [dma_process], eax |
||
734 | mov eax, [0x3010] |
||
735 | mov [dma_slot_ptr], eax |
||
736 | cmp [hdbase], 0x1F0 |
||
737 | jnz .ide1 |
||
738 | mov [irq14_func], hdd_irq14 |
||
739 | jmp @f |
||
740 | .ide1: |
||
741 | mov [irq15_func], hdd_irq15 |
||
742 | @@: |
||
743 | call enable_ide_int |
||
744 | cmp [hdbase], 0x1F0 |
||
745 | jnz .wait_ide1 |
||
746 | call wait_for_sector_dma_ide0 |
||
747 | jmp @f |
||
748 | .wait_ide1: |
||
749 | call wait_for_sector_dma_ide1 |
||
750 | @@: |
||
751 | cmp [hd_error], 0 |
||
752 | jnz hd_read_error |
||
753 | pop edx |
||
754 | pop eax |
||
755 | mov [dma_cur_sector], eax |
||
756 | jmp hd_read_dma |
||
757 | |||
758 | align 4 |
||
759 | write_cache_chain: |
||
760 | push esi |
||
761 | mov eax, IDE_descriptor_table |
||
762 | mov edx, [cache_chain_pos] |
||
763 | shl edx, 9 |
||
764 | add edx, 0x610000 |
||
765 | mov [eax], edx |
||
766 | movzx edx, [cache_chain_size] |
||
767 | shl edx, 9 |
||
768 | mov [eax+4], dx |
||
769 | jmp do_write_dma |
||
770 | write_cache_sector: |
||
771 | push esi |
||
772 | mov eax, IDE_descriptor_table |
||
773 | mov edx, edi |
||
774 | shl edx, 9 |
||
775 | add edx, 0x610000 |
||
776 | mov [eax], edx |
||
777 | mov word [eax+4], 0x200 |
||
778 | do_write_dma: |
||
779 | mov dx, [IDEContrRegsBaseAddr] |
||
780 | cmp [hdbase], 0x1F0 |
||
781 | jz @f |
||
782 | add edx, 8 |
||
783 | @@: |
||
784 | push edx |
||
785 | add edx, 4 |
||
786 | out dx, eax |
||
787 | pop edx |
||
788 | mov al, 0 |
||
789 | out dx, al |
||
790 | add edx, 2 |
||
791 | mov al, 6 |
||
792 | out dx, al |
||
793 | call wait_for_hd_idle |
||
794 | cmp [hd_error], 0 |
||
795 | jnz hd_write_error_dma |
||
796 | call disable_ide_int |
||
797 | xor eax, eax |
||
798 | mov edx, [hdbase] |
||
799 | inc edx |
||
800 | out dx, al |
||
801 | inc edx |
||
802 | mov al, [cache_chain_size] |
||
803 | out dx, al |
||
804 | inc edx |
||
805 | mov esi, [cache_chain_ptr] |
||
806 | mov eax, [esi] |
||
807 | out dx, al |
||
808 | shr eax, 8 |
||
809 | inc edx |
||
810 | out dx, al |
||
811 | shr eax, 8 |
||
812 | inc edx |
||
813 | out dx, al |
||
814 | shr eax, 8 |
||
815 | inc edx |
||
816 | and al, 0xF |
||
817 | add al, byte [hdid] |
||
818 | add al, 11100000b |
||
819 | out dx, al |
||
820 | inc edx |
||
821 | mov al, 0xCA |
||
822 | out dx, al |
||
823 | mov dx, [IDEContrRegsBaseAddr] |
||
824 | cmp [hdbase], 0x1F0 |
||
825 | jz @f |
||
826 | add dx, 8 |
||
827 | @@: |
||
828 | mov al, 1 |
||
829 | out dx, al |
||
830 | mov eax, [0x3000] |
||
831 | mov [dma_process], eax |
||
832 | mov eax, [0x3010] |
||
833 | mov [dma_slot_ptr], eax |
||
834 | cmp [hdbase], 0x1F0 |
||
835 | jnz .ide1 |
||
836 | mov [irq14_func], hdd_irq14 |
||
837 | jmp @f |
||
838 | .ide1: |
||
839 | mov [irq15_func], hdd_irq15 |
||
840 | @@: |
||
841 | call enable_ide_int |
||
842 | mov [dma_cur_sector], not 0x40 |
||
843 | cmp [hdbase], 0x1F0 |
||
844 | jnz .wait_ide1 |
||
845 | call wait_for_sector_dma_ide0 |
||
846 | jmp @f |
||
847 | .wait_ide1: |
||
848 | call wait_for_sector_dma_ide1 |
||
849 | @@: |
||
850 | cmp [hd_error], 0 |
||
851 | jnz hd_write_error_dma |
||
852 | pop esi |
||
853 | ret |
||
854 | |||
855 | uglobal |
||
856 | IDEContrRegsBaseAddr dw ? |
||
857 | endg |
||
161 | diamond | 858 | ; \end{Mario79} |