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Rev | Author | Line No. | Line |
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431 | serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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709 | diamond | 3 | ;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;; |
431 | serge | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
593 | mikedld | 8 | $Revision: 709 $ |
9 | |||
10 | |||
472 | serge | 11 | ; Low-level driver for HDD access |
346 | diamond | 12 | ; DMA support by Mario79 |
709 | diamond | 13 | ; Access through BIOS by diamond |
160 | diamond | 14 | |
15 | align 4 |
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16 | hd_read: |
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17 | ;----------------------------------------------------------- |
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18 | ; input : eax = block to read |
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19 | ; ebx = destination |
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20 | ;----------------------------------------------------------- |
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256 | diamond | 21 | and [hd_error], 0 |
160 | diamond | 22 | push ecx esi edi ; scan cache |
23 | |||
580 | mario79 | 24 | ; mov ecx,cache_max ; entries in cache |
25 | ; mov esi,HD_CACHE+8 |
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26 | call calculate_cache |
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27 | add esi,8 |
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581 | serge | 28 | |
160 | diamond | 29 | mov edi,1 |
30 | |||
31 | hdreadcache: |
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32 | |||
33 | cmp dword [esi+4],0 ; empty |
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34 | je nohdcache |
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35 | |||
36 | cmp [esi],eax ; correct sector |
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37 | je yeshdcache |
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38 | |||
39 | nohdcache: |
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40 | |||
41 | add esi,8 |
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42 | inc edi |
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43 | dec ecx |
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44 | jnz hdreadcache |
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45 | |||
46 | call find_empty_slot ; ret in edi |
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47 | cmp [hd_error],0 |
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48 | jne return_01 |
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709 | diamond | 49 | ; Read through BIOS? |
50 | cmp [hdpos], 0x80 |
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51 | jae .bios |
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514 | diamond | 52 | ; DMA read is permitted if [allow_dma_access]=1 or 2 |
53 | cmp [allow_dma_access], 2 |
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54 | ja .nodma |
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160 | diamond | 55 | cmp [dma_hdd], 1 |
56 | jnz .nodma |
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57 | call hd_read_dma |
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58 | jmp @f |
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59 | .nodma: |
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60 | call hd_read_pio |
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709 | diamond | 61 | jmp @f |
62 | .bios: |
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63 | call bd_read |
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160 | diamond | 64 | @@: |
580 | mario79 | 65 | ; lea esi,[edi*8+HD_CACHE] |
66 | ; push eax |
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67 | call calculate_cache_1 |
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68 | lea esi,[edi*8+esi] |
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69 | ; pop eax |
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160 | diamond | 70 | |
71 | mov [esi],eax ; sector number |
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72 | mov dword [esi+4],1 ; hd read - mark as same as in hd |
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73 | |||
74 | yeshdcache: |
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75 | |||
76 | mov esi,edi |
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77 | shl esi,9 |
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580 | mario79 | 78 | ; add esi,HD_CACHE+65536 |
79 | push eax |
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80 | call calculate_cache_2 |
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81 | add esi,eax |
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82 | pop eax |
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581 | serge | 83 | |
160 | diamond | 84 | mov edi,ebx |
85 | mov ecx,512/4 |
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86 | cld |
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87 | rep movsd ; move data |
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88 | return_01: |
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89 | pop edi esi ecx |
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90 | ret |
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91 | |||
92 | align 4 |
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93 | hd_read_pio: |
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94 | push eax edx |
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95 | |||
96 | call wait_for_hd_idle |
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97 | cmp [hd_error],0 |
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389 | serge | 98 | jne hd_read_error |
160 | diamond | 99 | |
321 | diamond | 100 | cli |
160 | diamond | 101 | xor eax,eax |
102 | mov edx,[hdbase] |
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103 | inc edx |
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104 | out dx,al ; ATAFeatures регистр "особенностей" |
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105 | inc edx |
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106 | inc eax |
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107 | out dx,al ; ATASectorCount счётчик секторов |
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108 | inc edx |
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109 | mov eax,[esp+4] |
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110 | out dx,al ; ATASectorNumber регистр номера сектора |
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111 | shr eax,8 |
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112 | inc edx |
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113 | out dx,al ; ATACylinder номер цилиндра (младший байт) |
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114 | shr eax,8 |
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115 | inc edx |
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116 | out dx,al ; номер цилиндра (старший байт) |
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117 | shr eax,8 |
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118 | inc edx |
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119 | and al,1+2+4+8 |
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120 | add al,byte [hdid] |
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121 | add al,128+64+32 |
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122 | out dx,al ; номер головки/номер диска |
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123 | inc edx |
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124 | mov al,20h |
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125 | out dx,al ; ATACommand регистр команд |
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321 | diamond | 126 | sti |
160 | diamond | 127 | |
128 | call wait_for_sector_buffer |
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129 | |||
130 | cmp [hd_error],0 |
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131 | jne hd_read_error |
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132 | |||
321 | diamond | 133 | cli |
160 | diamond | 134 | push edi |
135 | shl edi,9 |
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580 | mario79 | 136 | ; add edi,HD_CACHE+65536 |
137 | push eax |
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138 | call calculate_cache_2 |
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139 | add edi,eax |
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140 | pop eax |
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581 | serge | 141 | |
160 | diamond | 142 | mov ecx,256 |
143 | mov edx,[hdbase] |
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144 | cld |
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145 | rep insw |
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146 | pop edi |
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321 | diamond | 147 | sti |
160 | diamond | 148 | |
149 | pop edx eax |
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150 | ret |
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151 | |||
389 | serge | 152 | disable_ide_int: |
162 | diamond | 153 | ; mov edx,[hdbase] |
154 | ; add edx,0x206 |
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155 | ; mov al,2 |
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156 | ; out dx,al |
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157 | cli |
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160 | diamond | 158 | ret |
159 | |||
160 | enable_ide_int: |
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162 | diamond | 161 | ; mov edx,[hdbase] |
162 | ; add edx,0x206 |
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163 | ; mov al,0 |
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164 | ; out dx,al |
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165 | sti |
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160 | diamond | 166 | ret |
167 | |||
168 | align 4 |
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169 | hd_write: |
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170 | ;----------------------------------------------------------- |
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171 | ; input : eax = block |
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172 | ; ebx = pointer to memory |
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173 | ;----------------------------------------------------------- |
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174 | push ecx esi edi |
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175 | |||
176 | ; check if the cache already has the sector and overwrite it |
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177 | |||
580 | mario79 | 178 | ; mov ecx,cache_max |
179 | ; mov esi,HD_CACHE+8 |
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180 | call calculate_cache |
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181 | add esi,8 |
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581 | serge | 182 | |
160 | diamond | 183 | mov edi,1 |
184 | |||
185 | hdwritecache: |
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186 | |||
187 | cmp dword [esi+4],0 ; if cache slot is empty |
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188 | je not_in_cache_write |
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189 | |||
190 | cmp [esi],eax ; if the slot has the sector |
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191 | je yes_in_cache_write |
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192 | |||
193 | not_in_cache_write: |
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194 | |||
195 | add esi,8 |
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196 | inc edi |
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197 | dec ecx |
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198 | jnz hdwritecache |
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199 | |||
200 | ; sector not found in cache |
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201 | ; write the block to a new location |
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202 | |||
203 | call find_empty_slot ; ret in edi |
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204 | cmp [hd_error],0 |
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205 | jne hd_write_access_denied |
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206 | |||
580 | mario79 | 207 | ; lea esi,[edi*8+HD_CACHE] |
208 | ; push eax |
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209 | call calculate_cache_1 |
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210 | lea esi,[edi*8+esi] |
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211 | ; pop eax |
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212 | |||
160 | diamond | 213 | mov [esi],eax ; sector number |
214 | |||
215 | yes_in_cache_write: |
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216 | |||
217 | mov dword [esi+4],2 ; write - differs from hd |
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218 | |||
219 | shl edi,9 |
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580 | mario79 | 220 | ; add edi,HD_CACHE+65536 |
221 | push eax |
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222 | call calculate_cache_2 |
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223 | add edi,eax |
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224 | pop eax |
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581 | serge | 225 | |
160 | diamond | 226 | mov esi,ebx |
227 | mov ecx,512/4 |
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228 | cld |
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229 | rep movsd ; move data |
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230 | hd_write_access_denied: |
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231 | pop edi esi ecx |
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232 | ret |
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233 | |||
234 | align 4 |
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235 | cache_write_pio: |
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580 | mario79 | 236 | ; call disable_ide_int |
581 | serge | 237 | |
160 | diamond | 238 | call wait_for_hd_idle |
239 | cmp [hd_error],0 |
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240 | jne hd_write_error |
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241 | |||
580 | mario79 | 242 | cli |
160 | diamond | 243 | xor eax,eax |
244 | mov edx,[hdbase] |
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245 | inc edx |
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246 | out dx,al |
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247 | inc edx |
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248 | inc eax |
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249 | out dx,al |
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250 | inc edx |
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251 | mov eax,[esi] ; eax = sector to write |
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252 | out dx,al |
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253 | shr eax,8 |
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254 | inc edx |
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255 | out dx,al |
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256 | shr eax,8 |
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257 | inc edx |
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258 | out dx,al |
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259 | shr eax,8 |
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260 | inc edx |
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261 | and al,1+2+4+8 |
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262 | add al,byte [hdid] |
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263 | add al,128+64+32 |
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264 | out dx,al |
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265 | inc edx |
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266 | mov al,30h |
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267 | out dx,al |
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580 | mario79 | 268 | sti |
160 | diamond | 269 | |
270 | call wait_for_sector_buffer |
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271 | |||
272 | cmp [hd_error],0 |
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273 | jne hd_write_error |
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274 | |||
275 | push ecx esi |
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276 | |||
580 | mario79 | 277 | cli |
160 | diamond | 278 | mov esi,edi |
279 | shl esi,9 |
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580 | mario79 | 280 | ; add esi,HD_CACHE+65536 ; esi = from memory position |
281 | push eax |
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282 | call calculate_cache_2 |
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283 | add esi,eax |
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284 | pop eax |
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581 | serge | 285 | |
160 | diamond | 286 | mov ecx,256 |
287 | mov edx,[hdbase] |
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288 | cld |
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289 | rep outsw |
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580 | mario79 | 290 | sti |
160 | diamond | 291 | |
580 | mario79 | 292 | ; call enable_ide_int |
160 | diamond | 293 | pop esi ecx |
294 | |||
295 | ret |
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296 | |||
297 | save_hd_wait_timeout: |
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298 | |||
299 | push eax |
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465 | serge | 300 | mov eax,[timer_ticks] |
160 | diamond | 301 | add eax,300 ; 3 sec timeout |
302 | mov [hd_wait_timeout],eax |
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303 | pop eax |
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304 | ret |
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305 | |||
306 | align 4 |
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307 | check_hd_wait_timeout: |
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308 | |||
309 | push eax |
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310 | mov eax,[hd_wait_timeout] |
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465 | serge | 311 | cmp [timer_ticks], eax |
160 | diamond | 312 | jg hd_timeout_error |
313 | pop eax |
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314 | mov [hd_error],0 |
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315 | ret |
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316 | |||
358 | mikedld | 317 | ;iglobal |
318 | ; hd_timeout_str db 'K : FS - HD timeout',0 |
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319 | ; hd_read_str db 'K : FS - HD read error',0 |
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320 | ; hd_write_str db 'K : FS - HD write error',0 |
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321 | ; hd_lba_str db 'K : FS - HD LBA error',0 |
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322 | ;endg |
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160 | diamond | 323 | |
324 | hd_timeout_error: |
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325 | |||
321 | diamond | 326 | ; call clear_hd_cache |
327 | ; call clear_application_table_status |
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358 | mikedld | 328 | ; mov esi,hd_timeout_str |
329 | ; call sys_msg_board_str |
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465 | serge | 330 | DEBUGF 1,"K : FS - HD timeout\n" |
331 | |||
160 | diamond | 332 | mov [hd_error],1 |
333 | pop eax |
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334 | ret |
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335 | |||
336 | hd_read_error: |
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337 | |||
321 | diamond | 338 | ; call clear_hd_cache |
339 | ; call clear_application_table_status |
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358 | mikedld | 340 | ; mov esi,hd_read_str |
341 | ; call sys_msg_board_str |
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465 | serge | 342 | DEBUGF 1,"K : FS - HD read error\n" |
160 | diamond | 343 | pop edx eax |
161 | diamond | 344 | ret |
160 | diamond | 345 | |
346 | hd_write_error: |
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347 | |||
321 | diamond | 348 | ; call clear_hd_cache |
349 | ; call clear_application_table_status |
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465 | serge | 350 | ; mov esi,hd_write_str |
351 | ; call sys_msg_board_str |
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352 | DEBUGF 1,"K : FS - HD write error\n" |
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353 | ret |
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160 | diamond | 354 | |
355 | hd_write_error_dma: |
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321 | diamond | 356 | ; call clear_hd_cache |
357 | ; call clear_application_table_status |
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358 | mikedld | 358 | ; mov esi, hd_write_str |
359 | ; call sys_msg_board_str |
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465 | serge | 360 | DEBUGF 1,"K : FS - HD read error\n" |
160 | diamond | 361 | pop esi |
161 | diamond | 362 | ret |
160 | diamond | 363 | |
364 | hd_lba_error: |
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321 | diamond | 365 | ; call clear_hd_cache |
366 | ; call clear_application_table_status |
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358 | mikedld | 367 | ; mov esi,hd_lba_str |
368 | ; call sys_msg_board_str |
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465 | serge | 369 | DEBUGF 1,"K : FS - HD LBA error\n" |
370 | jmp LBA_read_ret |
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160 | diamond | 371 | |
372 | |||
373 | align 4 |
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374 | wait_for_hd_idle: |
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375 | |||
376 | push eax edx |
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377 | |||
378 | call save_hd_wait_timeout |
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379 | |||
380 | mov edx,[hdbase] |
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381 | add edx,0x7 |
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382 | |||
383 | wfhil1: |
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384 | |||
385 | call check_hd_wait_timeout |
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386 | cmp [hd_error],0 |
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387 | jne @f |
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388 | |||
389 | in al,dx |
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390 | test al,128 |
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391 | jnz wfhil1 |
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389 | serge | 392 | |
160 | diamond | 393 | @@: |
394 | |||
395 | pop edx eax |
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396 | ret |
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397 | |||
398 | |||
399 | align 4 |
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400 | wait_for_sector_buffer: |
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401 | |||
402 | push eax edx |
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403 | |||
404 | mov edx,[hdbase] |
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405 | add edx,0x7 |
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406 | |||
407 | call save_hd_wait_timeout |
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408 | |||
409 | hdwait_sbuf: ; wait for sector buffer to be ready |
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410 | |||
411 | call check_hd_wait_timeout |
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412 | cmp [hd_error],0 |
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413 | jne @f |
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414 | |||
415 | in al,dx |
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416 | test al,8 |
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417 | jz hdwait_sbuf |
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418 | |||
419 | mov [hd_error],0 |
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420 | |||
421 | cmp [hd_setup],1 ; do not mark error for setup request |
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422 | je buf_wait_ok |
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423 | |||
424 | test al,1 ; previous command ended up with an error |
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425 | jz buf_wait_ok |
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426 | @@: |
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427 | mov [hd_error],1 |
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428 | |||
429 | buf_wait_ok: |
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430 | |||
431 | pop edx eax |
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432 | ret |
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433 | |||
346 | diamond | 434 | ; \begin{Mario79} |
160 | diamond | 435 | align 4 |
436 | wait_for_sector_dma_ide0: |
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437 | push eax |
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438 | push edx |
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439 | call save_hd_wait_timeout |
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440 | .wait: |
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441 | call change_task |
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442 | cmp [irq14_func], hdd_irq14 |
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443 | jnz .done |
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444 | call check_hd_wait_timeout |
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445 | cmp [hd_error], 0 |
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446 | jz .wait |
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447 | mov [irq14_func], hdd_irq_null |
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448 | mov dx, [IDEContrRegsBaseAddr] |
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449 | mov al, 0 |
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450 | out dx, al |
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451 | .done: |
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452 | pop edx |
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453 | pop eax |
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454 | ret |
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455 | |||
456 | align 4 |
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457 | wait_for_sector_dma_ide1: |
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458 | push eax |
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459 | push edx |
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460 | call save_hd_wait_timeout |
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461 | .wait: |
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462 | call change_task |
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463 | cmp [irq15_func], hdd_irq15 |
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464 | jnz .done |
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465 | call check_hd_wait_timeout |
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466 | cmp [hd_error], 0 |
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467 | jz .wait |
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468 | mov [irq15_func], hdd_irq_null |
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469 | mov dx, [IDEContrRegsBaseAddr] |
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470 | add dx, 8 |
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471 | mov al, 0 |
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472 | out dx, al |
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473 | .done: |
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474 | pop edx |
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475 | pop eax |
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476 | ret |
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477 | |||
478 | iglobal |
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479 | align 4 |
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480 | ; note that IDE descriptor table must be 4-byte aligned and do not cross 4K boundary |
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481 | IDE_descriptor_table: |
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581 | serge | 482 | dd IDE_DMA |
465 | serge | 483 | dw 0x2000 |
484 | dw 0x8000 |
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160 | diamond | 485 | |
486 | dma_cur_sector dd not 40h |
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597 | mario79 | 487 | dma_hdpos dd 0 |
160 | diamond | 488 | irq14_func dd hdd_irq_null |
489 | irq15_func dd hdd_irq_null |
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490 | endg |
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491 | |||
492 | uglobal |
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493 | ; all uglobals are zeroed at boot |
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494 | dma_process dd 0 |
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495 | dma_slot_ptr dd 0 |
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496 | cache_chain_pos dd 0 |
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497 | cache_chain_ptr dd 0 |
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498 | cache_chain_size db 0 |
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499 | cache_chain_started db 0 |
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500 | dma_task_switched db 0 |
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501 | dma_hdd db 0 |
||
514 | diamond | 502 | allow_dma_access db 0 |
160 | diamond | 503 | endg |
504 | |||
505 | align 4 |
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506 | hdd_irq14: |
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507 | pushfd |
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508 | cli |
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509 | pushad |
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510 | mov [irq14_func], hdd_irq_null |
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511 | mov dx, [IDEContrRegsBaseAddr] |
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512 | mov al, 0 |
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513 | out dx, al |
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465 | serge | 514 | ; call update_counters |
515 | ; mov ebx, [dma_process] |
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516 | ; cmp [CURRENT_TASK], ebx |
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517 | ; jz .noswitch |
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518 | ; mov [dma_task_switched], 1 |
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519 | ; mov edi, [dma_slot_ptr] |
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520 | ; mov eax, [CURRENT_TASK] |
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521 | ; mov [dma_process], eax |
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522 | ; mov eax, [TASK_BASE] |
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523 | ; mov [dma_slot_ptr], eax |
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524 | ; mov [CURRENT_TASK], ebx |
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525 | ; mov [TASK_BASE], edi |
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526 | ; mov byte [DONT_SWITCH], 1 |
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527 | ; call do_change_task |
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160 | diamond | 528 | .noswitch: |
529 | popad |
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530 | popfd |
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531 | align 4 |
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532 | hdd_irq_null: |
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533 | ret |
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534 | |||
535 | align 4 |
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536 | hdd_irq15: |
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537 | pushfd |
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538 | cli |
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539 | pushad |
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540 | mov [irq15_func], hdd_irq_null |
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541 | mov dx, [IDEContrRegsBaseAddr] |
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542 | add dx, 8 |
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543 | mov al, 0 |
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544 | out dx, al |
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465 | serge | 545 | ; call update_counters |
546 | ; mov ebx, [dma_process] |
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547 | ; cmp [CURRENT_TASK], ebx |
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548 | ; jz .noswitch |
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549 | ; mov [dma_task_switched], 1 |
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550 | ; mov edi, [dma_slot_ptr] |
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551 | ; mov eax, [CURRENT_TASK] |
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552 | ; mov [dma_process], eax |
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553 | ; mov eax, [TASK_BASE] |
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554 | ; mov [dma_slot_ptr], eax |
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555 | ; mov [CURRENT_TASK], ebx |
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556 | ; mov [TASK_BASE], edi |
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557 | ; mov byte [DONT_SWITCH], 1 |
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558 | ; call do_change_task |
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160 | diamond | 559 | .noswitch: |
560 | popad |
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561 | popfd |
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562 | ret |
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563 | |||
564 | align 4 |
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565 | hd_read_dma: |
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566 | push eax |
||
567 | push edx |
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597 | mario79 | 568 | mov edx,[dma_hdpos] |
569 | cmp edx,[hdpos] |
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570 | jne .notread |
||
160 | diamond | 571 | mov edx, [dma_cur_sector] |
572 | cmp eax, edx |
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573 | jb .notread |
||
574 | add edx, 15 |
||
575 | cmp [esp+4], edx |
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576 | ja .notread |
||
577 | mov eax, [esp+4] |
||
578 | sub eax, [dma_cur_sector] |
||
579 | shl eax, 9 |
||
581 | serge | 580 | add eax, (OS_BASE+IDE_DMA) |
160 | diamond | 581 | push ecx esi edi |
582 | mov esi, eax |
||
583 | shl edi, 9 |
||
580 | mario79 | 584 | ; add edi, HD_CACHE+0x10000 |
585 | push eax |
||
586 | call calculate_cache_2 |
||
587 | add edi,eax |
||
588 | pop eax |
||
581 | serge | 589 | |
160 | diamond | 590 | mov ecx, 512/4 |
591 | cld |
||
592 | rep movsd |
||
593 | pop edi esi ecx |
||
594 | pop edx |
||
595 | pop eax |
||
596 | ret |
||
597 | .notread: |
||
465 | serge | 598 | mov eax, IDE_descriptor_table |
581 | serge | 599 | mov dword [eax], IDE_DMA |
465 | serge | 600 | mov word [eax+4], 0x2000 |
601 | sub eax, OS_BASE |
||
160 | diamond | 602 | mov dx, [IDEContrRegsBaseAddr] |
603 | cmp [hdbase], 0x1F0 |
||
604 | jz @f |
||
605 | add edx, 8 |
||
606 | @@: |
||
607 | push edx |
||
608 | add edx, 4 |
||
609 | out dx, eax |
||
610 | pop edx |
||
611 | mov al, 0 |
||
612 | out dx, al |
||
613 | add edx, 2 |
||
614 | mov al, 6 |
||
615 | out dx, al |
||
616 | call wait_for_hd_idle |
||
617 | cmp [hd_error], 0 |
||
618 | jnz hd_read_error |
||
619 | call disable_ide_int |
||
620 | xor eax, eax |
||
621 | mov edx, [hdbase] |
||
622 | inc edx |
||
623 | out dx, al |
||
624 | inc edx |
||
625 | mov eax, 10h |
||
626 | out dx, al |
||
627 | inc edx |
||
628 | mov eax, [esp+4] |
||
629 | out dx, al |
||
630 | shr eax, 8 |
||
631 | inc edx |
||
632 | out dx, al |
||
633 | shr eax, 8 |
||
634 | inc edx |
||
635 | out dx, al |
||
636 | shr eax, 8 |
||
637 | inc edx |
||
638 | and al, 0xF |
||
639 | add al, byte [hdid] |
||
640 | add al, 11100000b |
||
641 | out dx, al |
||
642 | inc edx |
||
643 | mov al, 0xC8 |
||
644 | out dx, al |
||
645 | mov dx, [IDEContrRegsBaseAddr] |
||
646 | cmp [hdbase], 0x1F0 |
||
647 | jz @f |
||
648 | add dx, 8 |
||
649 | @@: |
||
650 | mov al, 9 |
||
651 | out dx, al |
||
389 | serge | 652 | mov eax, [CURRENT_TASK] |
160 | diamond | 653 | mov [dma_process], eax |
389 | serge | 654 | mov eax, [TASK_BASE] |
160 | diamond | 655 | mov [dma_slot_ptr], eax |
656 | cmp [hdbase], 0x1F0 |
||
657 | jnz .ide1 |
||
658 | mov [irq14_func], hdd_irq14 |
||
659 | jmp @f |
||
660 | .ide1: |
||
661 | mov [irq15_func], hdd_irq15 |
||
662 | @@: |
||
663 | call enable_ide_int |
||
664 | cmp [hdbase], 0x1F0 |
||
665 | jnz .wait_ide1 |
||
666 | call wait_for_sector_dma_ide0 |
||
667 | jmp @f |
||
668 | .wait_ide1: |
||
669 | call wait_for_sector_dma_ide1 |
||
670 | @@: |
||
671 | cmp [hd_error], 0 |
||
672 | jnz hd_read_error |
||
597 | mario79 | 673 | mov eax,[hdpos] |
674 | mov [dma_hdpos],eax |
||
160 | diamond | 675 | pop edx |
676 | pop eax |
||
677 | mov [dma_cur_sector], eax |
||
678 | jmp hd_read_dma |
||
679 | |||
680 | align 4 |
||
681 | write_cache_sector: |
||
580 | mario79 | 682 | mov [cache_chain_size],1 |
683 | mov [cache_chain_pos],edi |
||
581 | serge | 684 | write_cache_chain: |
709 | diamond | 685 | cmp [hdpos], 0x80 |
686 | jae bd_write_cache_chain |
||
160 | diamond | 687 | push esi |
688 | mov eax, IDE_descriptor_table |
||
580 | mario79 | 689 | mov edx,eax |
690 | pusha |
||
691 | mov esi,[cache_chain_pos] |
||
692 | shl esi, 9 |
||
693 | call calculate_cache_2 |
||
694 | add esi,eax |
||
581 | serge | 695 | mov edi, (OS_BASE+IDE_DMA) |
696 | mov dword [edx], IDE_DMA |
||
580 | mario79 | 697 | movzx ecx, [cache_chain_size] |
698 | shl ecx, 9 |
||
699 | mov word [edx+4], cx |
||
700 | shr ecx,2 |
||
701 | cld |
||
702 | rep movsd |
||
703 | popa |
||
465 | serge | 704 | sub eax, OS_BASE |
160 | diamond | 705 | mov dx, [IDEContrRegsBaseAddr] |
706 | cmp [hdbase], 0x1F0 |
||
707 | jz @f |
||
708 | add edx, 8 |
||
709 | @@: |
||
710 | push edx |
||
711 | add edx, 4 |
||
712 | out dx, eax |
||
713 | pop edx |
||
714 | mov al, 0 |
||
715 | out dx, al |
||
716 | add edx, 2 |
||
717 | mov al, 6 |
||
718 | out dx, al |
||
719 | call wait_for_hd_idle |
||
720 | cmp [hd_error], 0 |
||
721 | jnz hd_write_error_dma |
||
722 | call disable_ide_int |
||
723 | xor eax, eax |
||
724 | mov edx, [hdbase] |
||
725 | inc edx |
||
726 | out dx, al |
||
727 | inc edx |
||
728 | mov al, [cache_chain_size] |
||
729 | out dx, al |
||
730 | inc edx |
||
731 | mov esi, [cache_chain_ptr] |
||
732 | mov eax, [esi] |
||
733 | out dx, al |
||
734 | shr eax, 8 |
||
735 | inc edx |
||
736 | out dx, al |
||
737 | shr eax, 8 |
||
738 | inc edx |
||
739 | out dx, al |
||
740 | shr eax, 8 |
||
741 | inc edx |
||
742 | and al, 0xF |
||
743 | add al, byte [hdid] |
||
744 | add al, 11100000b |
||
745 | out dx, al |
||
746 | inc edx |
||
747 | mov al, 0xCA |
||
748 | out dx, al |
||
749 | mov dx, [IDEContrRegsBaseAddr] |
||
750 | cmp [hdbase], 0x1F0 |
||
751 | jz @f |
||
752 | add dx, 8 |
||
753 | @@: |
||
754 | mov al, 1 |
||
755 | out dx, al |
||
389 | serge | 756 | mov eax, [CURRENT_TASK] |
160 | diamond | 757 | mov [dma_process], eax |
389 | serge | 758 | mov eax, [TASK_BASE] |
160 | diamond | 759 | mov [dma_slot_ptr], eax |
760 | cmp [hdbase], 0x1F0 |
||
761 | jnz .ide1 |
||
762 | mov [irq14_func], hdd_irq14 |
||
763 | jmp @f |
||
764 | .ide1: |
||
765 | mov [irq15_func], hdd_irq15 |
||
766 | @@: |
||
767 | call enable_ide_int |
||
768 | mov [dma_cur_sector], not 0x40 |
||
769 | cmp [hdbase], 0x1F0 |
||
770 | jnz .wait_ide1 |
||
771 | call wait_for_sector_dma_ide0 |
||
772 | jmp @f |
||
773 | .wait_ide1: |
||
774 | call wait_for_sector_dma_ide1 |
||
775 | @@: |
||
776 | cmp [hd_error], 0 |
||
777 | jnz hd_write_error_dma |
||
778 | pop esi |
||
779 | ret |
||
780 | |||
781 | uglobal |
||
782 | IDEContrRegsBaseAddr dw ? |
||
783 | endg |
||
346 | diamond | 784 | ; \end{Mario79} |
709 | diamond | 785 | |
786 | ; \begin{diamond} |
||
787 | uglobal |
||
788 | bios_hdpos dd 0 ; 0 is invalid value for [hdpos] |
||
789 | bios_cur_sector dd ? |
||
790 | bios_read_len dd ? |
||
791 | endg |
||
792 | bd_read: |
||
793 | push eax |
||
794 | push edx |
||
795 | mov edx, [bios_hdpos] |
||
796 | cmp edx, [hdpos] |
||
797 | jne .notread |
||
798 | mov edx, [bios_cur_sector] |
||
799 | cmp eax, edx |
||
800 | jb .notread |
||
801 | add edx, [bios_read_len] |
||
802 | dec edx |
||
803 | cmp eax, edx |
||
804 | ja .notread |
||
805 | sub eax, [bios_cur_sector] |
||
806 | shl eax, 9 |
||
807 | add eax, (OS_BASE+0x9C000) |
||
808 | push ecx esi edi |
||
809 | mov esi, eax |
||
810 | shl edi, 9 |
||
811 | ; add edi, HD_CACHE+0x10000 |
||
812 | push eax |
||
813 | call calculate_cache_2 |
||
814 | add edi,eax |
||
815 | pop eax |
||
816 | |||
817 | mov ecx, 512/4 |
||
818 | cld |
||
819 | rep movsd |
||
820 | pop edi esi ecx |
||
821 | pop edx |
||
822 | pop eax |
||
823 | ret |
||
824 | .notread: |
||
825 | push ecx |
||
826 | mov dl, 42h |
||
827 | mov ecx, 16 |
||
828 | call int13_call |
||
829 | pop ecx |
||
830 | test eax, eax |
||
831 | jnz .v86err |
||
832 | test edx, edx |
||
833 | jz .readerr |
||
834 | mov [bios_read_len], edx |
||
835 | mov edx, [hdpos] |
||
836 | mov [bios_hdpos], edx |
||
837 | pop edx |
||
838 | pop eax |
||
839 | mov [bios_cur_sector], eax |
||
840 | jmp bd_read |
||
841 | .readerr: |
||
842 | .v86err: |
||
843 | mov [hd_error], 1 |
||
844 | jmp hd_read_error |
||
845 | |||
846 | bd_write_cache_chain: |
||
847 | pusha |
||
848 | mov esi, [cache_chain_pos] |
||
849 | shl esi, 9 |
||
850 | call calculate_cache_2 |
||
851 | add esi, eax |
||
852 | mov edi, OS_BASE + 0x9C000 |
||
853 | movzx ecx, [cache_chain_size] |
||
854 | push ecx |
||
855 | shl ecx, 9-2 |
||
856 | rep movsd |
||
857 | pop ecx |
||
858 | mov dl, 43h |
||
859 | mov eax, [cache_chain_ptr] |
||
860 | mov eax, [eax] |
||
861 | call int13_call |
||
862 | test eax, eax |
||
863 | jnz .v86err |
||
864 | cmp edx, ecx |
||
865 | jnz .writeerr |
||
866 | popa |
||
867 | ret |
||
868 | .v86err: |
||
869 | .writeerr: |
||
870 | popa |
||
871 | mov [hd_error], 1 |
||
872 | jmp hd_write_error |
||
873 | |||
874 | uglobal |
||
875 | int13_regs_in rb v86_regs.size |
||
876 | int13_regs_out rb v86_regs.size |
||
877 | endg |
||
878 | |||
879 | int13_call: |
||
880 | ; Because this code uses fixed addresses, |
||
881 | ; it can not be run simultaniously by many threads. |
||
882 | ; In current implementation it is protected by common mutex 'hd1_status' |
||
883 | mov word [BOOT_VAR + 510h], 10h ; packet length |
||
884 | mov word [BOOT_VAR + 512h], cx ; number of sectors |
||
885 | mov dword [BOOT_VAR + 514h], 9C000000h ; buffer 9C00:0000 |
||
886 | mov dword [BOOT_VAR + 518h], eax |
||
887 | and dword [BOOT_VAR + 51Ch], 0 |
||
888 | push ebx ecx esi edi |
||
889 | mov ebx, int13_regs_in |
||
890 | mov edi, ebx |
||
891 | mov ecx, v86_regs.size/4 |
||
892 | xor eax, eax |
||
893 | rep stosd |
||
894 | mov byte [ebx+v86_regs.eax+1], dl |
||
895 | mov eax, [hdpos] |
||
896 | lea eax, [BiosDisksData+(eax-80h)*4] |
||
897 | mov dl, [eax] |
||
898 | mov byte [ebx+v86_regs.edx], dl |
||
899 | movzx edx, byte [eax+1] |
||
900 | ; mov dl, 5 |
||
901 | test edx, edx |
||
902 | jnz .hasirq |
||
903 | dec edx |
||
904 | jmp @f |
||
905 | .hasirq: |
||
906 | pushad |
||
907 | stdcall enable_irq, edx |
||
908 | popad |
||
909 | @@: |
||
910 | mov word [ebx+v86_regs.esi], 510h |
||
911 | mov word [ebx+v86_regs.esp], 900h |
||
912 | mov word [ebx+v86_regs.eip], 500h |
||
913 | mov [ebx+v86_regs.eflags], 20200h |
||
914 | mov esi, [sys_v86_machine] |
||
915 | mov ecx, 0x502 |
||
916 | call v86_start |
||
917 | and [bios_hdpos], 0 |
||
918 | pop edi esi ecx ebx |
||
919 | movzx edx, byte [BOOT_VAR + 512h] |
||
920 | test byte [int13_regs_out+v86_regs.eflags], 1 |
||
921 | jnz @f |
||
922 | mov edx, ecx |
||
923 | @@: |
||
924 | ret |
||
925 | ; \end{diamond} |