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Rev | Author | Line No. | Line |
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2288 | clevermous | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;; |
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4 | ;; Distributed under terms of the GNU General Public License ;; |
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5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
8 | $Revision: 2288 $ |
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9 | |||
10 | |||
11 | ; Low-level driver for HDD access |
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12 | ; DMA support by Mario79 |
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13 | ; Access through BIOS by diamond |
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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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21 | and [hd_error], 0 |
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22 | push ecx esi edi ; scan cache |
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23 | |||
24 | ; mov ecx,cache_max ; entries in cache |
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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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28 | |||
29 | mov edi, 1 |
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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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49 | ; Read through BIOS? |
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50 | cmp [hdpos], 0x80 |
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51 | jae .bios |
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52 | ; hd_read_{dma,pio} use old ATA with 28 bit for sector number |
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53 | cmp eax, 0x10000000 |
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54 | jb @f |
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55 | inc [hd_error] |
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56 | jmp return_01 |
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57 | @@: |
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58 | ; DMA read is permitted if [allow_dma_access]=1 or 2 |
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59 | cmp [allow_dma_access], 2 |
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60 | ja .nodma |
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61 | cmp [dma_hdd], 1 |
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62 | jnz .nodma |
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63 | call hd_read_dma |
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64 | jmp @f |
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65 | .nodma: |
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66 | call hd_read_pio |
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67 | jmp @f |
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68 | .bios: |
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69 | call bd_read |
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70 | @@: |
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71 | cmp [hd_error], 0 |
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72 | jne return_01 |
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73 | ; lea esi,[edi*8+HD_CACHE] |
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74 | ; push eax |
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75 | call calculate_cache_1 |
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76 | lea esi, [edi*8+esi] |
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77 | ; pop eax |
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78 | |||
79 | mov [esi], eax ; sector number |
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80 | mov dword [esi+4], 1; hd read - mark as same as in hd |
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81 | |||
82 | yeshdcache: |
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83 | |||
84 | mov esi, edi |
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85 | shl esi, 9 |
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86 | ; add esi,HD_CACHE+65536 |
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87 | push eax |
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88 | call calculate_cache_2 |
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89 | add esi, eax |
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90 | pop eax |
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91 | |||
92 | mov edi, ebx |
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93 | mov ecx, 512/4 |
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94 | cld |
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95 | rep movsd ; move data |
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96 | return_01: |
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97 | pop edi esi ecx |
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98 | ret |
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99 | |||
100 | align 4 |
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101 | hd_read_pio: |
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102 | push eax edx |
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103 | |||
104 | call wait_for_hd_idle |
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105 | cmp [hd_error], 0 |
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106 | jne hd_read_error |
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107 | |||
108 | cli |
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109 | xor eax, eax |
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110 | mov edx, [hdbase] |
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111 | inc edx |
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112 | out dx, al; ATAFeatures регистр "особенностей" |
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113 | inc edx |
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114 | inc eax |
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115 | out dx, al; ATASectorCount счётчик секторов |
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116 | inc edx |
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117 | mov eax, [esp+4] |
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118 | out dx, al; ATASectorNumber регистр номера сектора |
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119 | shr eax, 8 |
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120 | inc edx |
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121 | out dx, al; ATACylinder номер цилиндра (младший байт) |
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122 | shr eax, 8 |
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123 | inc edx |
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124 | out dx, al; номер цилиндра (старший байт) |
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125 | shr eax, 8 |
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126 | inc edx |
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127 | and al, 1+2+4+8 |
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128 | add al, byte [hdid] |
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129 | add al, 128+64+32 |
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130 | out dx, al; номер головки/номер диска |
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131 | inc edx |
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132 | mov al, 20h |
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133 | out dx, al; ATACommand регистр команд |
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134 | sti |
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135 | |||
136 | call wait_for_sector_buffer |
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137 | |||
138 | cmp [hd_error], 0 |
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139 | jne hd_read_error |
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140 | |||
141 | cli |
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142 | push edi |
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143 | shl edi, 9 |
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144 | ; add edi,HD_CACHE+65536 |
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145 | push eax |
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146 | call calculate_cache_2 |
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147 | add edi, eax |
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148 | pop eax |
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149 | |||
150 | mov ecx, 256 |
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151 | mov edx, [hdbase] |
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152 | cld |
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153 | rep insw |
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154 | pop edi |
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155 | sti |
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156 | |||
157 | pop edx eax |
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158 | ret |
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159 | |||
160 | disable_ide_int: |
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161 | ; mov edx,[hdbase] |
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162 | ; add edx,0x206 |
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163 | ; mov al,2 |
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164 | ; out dx,al |
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165 | cli |
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166 | ret |
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167 | |||
168 | enable_ide_int: |
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169 | ; mov edx,[hdbase] |
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170 | ; add edx,0x206 |
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171 | ; mov al,0 |
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172 | ; out dx,al |
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173 | sti |
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174 | ret |
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175 | |||
176 | align 4 |
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177 | hd_write: |
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178 | ;----------------------------------------------------------- |
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179 | ; input : eax = block |
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180 | ; ebx = pointer to memory |
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181 | ;----------------------------------------------------------- |
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182 | push ecx esi edi |
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183 | |||
184 | ; check if the cache already has the sector and overwrite it |
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185 | |||
186 | ; mov ecx,cache_max |
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187 | ; mov esi,HD_CACHE+8 |
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188 | call calculate_cache |
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189 | add esi, 8 |
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190 | |||
191 | mov edi, 1 |
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192 | |||
193 | hdwritecache: |
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194 | |||
195 | cmp dword [esi+4], 0; if cache slot is empty |
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196 | je not_in_cache_write |
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197 | |||
198 | cmp [esi], eax ; if the slot has the sector |
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199 | je yes_in_cache_write |
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200 | |||
201 | not_in_cache_write: |
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202 | |||
203 | add esi, 8 |
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204 | inc edi |
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205 | dec ecx |
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206 | jnz hdwritecache |
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207 | |||
208 | ; sector not found in cache |
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209 | ; write the block to a new location |
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210 | |||
211 | call find_empty_slot ; ret in edi |
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212 | cmp [hd_error], 0 |
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213 | jne hd_write_access_denied |
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214 | |||
215 | ; lea esi,[edi*8+HD_CACHE] |
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216 | ; push eax |
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217 | call calculate_cache_1 |
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218 | lea esi, [edi*8+esi] |
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219 | ; pop eax |
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220 | |||
221 | mov [esi], eax ; sector number |
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222 | |||
223 | yes_in_cache_write: |
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224 | |||
225 | mov dword [esi+4], 2; write - differs from hd |
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226 | |||
227 | shl edi, 9 |
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228 | ; add edi,HD_CACHE+65536 |
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229 | push eax |
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230 | call calculate_cache_2 |
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231 | add edi, eax |
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232 | pop eax |
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233 | |||
234 | mov esi, ebx |
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235 | mov ecx, 512/4 |
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236 | cld |
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237 | rep movsd ; move data |
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238 | hd_write_access_denied: |
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239 | pop edi esi ecx |
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240 | ret |
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241 | |||
242 | align 4 |
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243 | cache_write_pio: |
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244 | cmp dword[esi], 0x10000000 |
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245 | jae .bad |
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246 | ; call disable_ide_int |
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247 | |||
248 | call wait_for_hd_idle |
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249 | cmp [hd_error], 0 |
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250 | jne hd_write_error |
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251 | |||
252 | cli |
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253 | xor eax, eax |
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254 | mov edx, [hdbase] |
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255 | inc edx |
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256 | out dx, al |
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257 | inc edx |
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258 | inc eax |
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259 | out dx, al |
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260 | inc edx |
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261 | mov eax, [esi] ; eax = sector to write |
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262 | out dx, al |
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263 | shr eax, 8 |
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264 | inc edx |
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265 | out dx, al |
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266 | shr eax, 8 |
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267 | inc edx |
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268 | out dx, al |
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269 | shr eax, 8 |
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270 | inc edx |
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271 | and al, 1+2+4+8 |
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272 | add al, byte [hdid] |
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273 | add al, 128+64+32 |
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274 | out dx, al |
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275 | inc edx |
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276 | mov al, 30h |
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277 | out dx, al |
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278 | sti |
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279 | |||
280 | call wait_for_sector_buffer |
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281 | |||
282 | cmp [hd_error], 0 |
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283 | jne hd_write_error |
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284 | |||
285 | push ecx esi |
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286 | |||
287 | cli |
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288 | mov esi, edi |
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289 | shl esi, 9 |
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290 | ; add esi,HD_CACHE+65536 ; esi = from memory position |
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291 | push eax |
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292 | call calculate_cache_2 |
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293 | add esi, eax |
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294 | pop eax |
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295 | |||
296 | mov ecx, 256 |
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297 | mov edx, [hdbase] |
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298 | cld |
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299 | rep outsw |
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300 | sti |
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301 | |||
302 | ; call enable_ide_int |
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303 | pop esi ecx |
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304 | |||
305 | ret |
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306 | .bad: |
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307 | inc [hd_error] |
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308 | ret |
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309 | |||
310 | save_hd_wait_timeout: |
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311 | |||
312 | push eax |
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313 | mov eax, [timer_ticks] |
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314 | add eax, 300 ; 3 sec timeout |
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315 | mov [hd_wait_timeout], eax |
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316 | pop eax |
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317 | ret |
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318 | |||
319 | align 4 |
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320 | check_hd_wait_timeout: |
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321 | |||
322 | push eax |
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323 | mov eax, [hd_wait_timeout] |
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324 | cmp [timer_ticks], eax |
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325 | jg hd_timeout_error |
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326 | pop eax |
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327 | mov [hd_error], 0 |
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328 | ret |
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329 | |||
330 | ;iglobal |
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331 | ; hd_timeout_str db 'K : FS - HD timeout',0 |
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332 | ; hd_read_str db 'K : FS - HD read error',0 |
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333 | ; hd_write_str db 'K : FS - HD write error',0 |
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334 | ; hd_lba_str db 'K : FS - HD LBA error',0 |
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335 | ;endg |
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336 | |||
337 | hd_timeout_error: |
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338 | |||
339 | ; call clear_hd_cache |
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340 | ; call clear_application_table_status |
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341 | ; mov esi,hd_timeout_str |
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342 | ; call sys_msg_board_str |
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343 | DEBUGF 1,"K : FS - HD timeout\n" |
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344 | |||
345 | mov [hd_error], 1 |
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346 | pop eax |
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347 | ret |
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348 | |||
349 | hd_read_error: |
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350 | |||
351 | ; call clear_hd_cache |
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352 | ; call clear_application_table_status |
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353 | ; mov esi,hd_read_str |
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354 | ; call sys_msg_board_str |
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355 | DEBUGF 1,"K : FS - HD read error\n" |
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356 | pop edx eax |
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357 | ret |
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358 | |||
359 | hd_write_error: |
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360 | |||
361 | ; call clear_hd_cache |
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362 | ; call clear_application_table_status |
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363 | ; mov esi,hd_write_str |
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364 | ; call sys_msg_board_str |
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365 | DEBUGF 1,"K : FS - HD write error\n" |
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366 | ret |
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367 | |||
368 | hd_write_error_dma: |
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369 | ; call clear_hd_cache |
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370 | ; call clear_application_table_status |
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371 | ; mov esi, hd_write_str |
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372 | ; call sys_msg_board_str |
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373 | DEBUGF 1,"K : FS - HD read error\n" |
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374 | pop esi |
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375 | ret |
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376 | |||
377 | hd_lba_error: |
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378 | ; call clear_hd_cache |
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379 | ; call clear_application_table_status |
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380 | ; mov esi,hd_lba_str |
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381 | ; call sys_msg_board_str |
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382 | DEBUGF 1,"K : FS - HD LBA error\n" |
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383 | jmp LBA_read_ret |
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384 | |||
385 | |||
386 | align 4 |
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387 | wait_for_hd_idle: |
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388 | |||
389 | push eax edx |
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390 | |||
391 | call save_hd_wait_timeout |
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392 | |||
393 | mov edx, [hdbase] |
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394 | add edx, 0x7 |
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395 | |||
396 | wfhil1: |
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397 | |||
398 | call check_hd_wait_timeout |
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399 | cmp [hd_error], 0 |
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400 | jne @f |
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401 | |||
402 | in al, dx |
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403 | test al, 128 |
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404 | jnz wfhil1 |
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405 | |||
406 | @@: |
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407 | |||
408 | pop edx eax |
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409 | ret |
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410 | |||
411 | |||
412 | align 4 |
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413 | wait_for_sector_buffer: |
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414 | |||
415 | push eax edx |
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416 | |||
417 | mov edx, [hdbase] |
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418 | add edx, 0x7 |
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419 | |||
420 | call save_hd_wait_timeout |
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421 | |||
422 | hdwait_sbuf: ; wait for sector buffer to be ready |
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423 | |||
424 | call check_hd_wait_timeout |
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425 | cmp [hd_error], 0 |
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426 | jne @f |
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427 | |||
428 | in al, dx |
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429 | test al, 8 |
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430 | jz hdwait_sbuf |
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431 | |||
432 | mov [hd_error], 0 |
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433 | |||
434 | cmp [hd_setup], 1 ; do not mark error for setup request |
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435 | je buf_wait_ok |
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436 | |||
437 | test al, 1 ; previous command ended up with an error |
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438 | jz buf_wait_ok |
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439 | @@: |
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440 | mov [hd_error], 1 |
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441 | |||
442 | buf_wait_ok: |
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443 | |||
444 | pop edx eax |
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445 | ret |
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446 | |||
447 | ; \begin{Mario79} |
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448 | align 4 |
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449 | wait_for_sector_dma_ide0: |
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450 | push eax |
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451 | push edx |
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452 | call save_hd_wait_timeout |
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453 | .wait: |
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454 | call change_task |
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455 | cmp [irq14_func], hdd_irq14 |
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456 | jnz .done |
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457 | call check_hd_wait_timeout |
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458 | cmp [hd_error], 0 |
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459 | jz .wait |
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460 | mov [irq14_func], hdd_irq_null |
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461 | mov dx, [IDEContrRegsBaseAddr] |
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462 | mov al, 0 |
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463 | out dx, al |
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464 | .done: |
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465 | pop edx |
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466 | pop eax |
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467 | ret |
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468 | |||
469 | align 4 |
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470 | wait_for_sector_dma_ide1: |
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471 | push eax |
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472 | push edx |
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473 | call save_hd_wait_timeout |
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474 | .wait: |
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475 | call change_task |
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476 | cmp [irq15_func], hdd_irq15 |
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477 | jnz .done |
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478 | call check_hd_wait_timeout |
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479 | cmp [hd_error], 0 |
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480 | jz .wait |
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481 | mov [irq15_func], hdd_irq_null |
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482 | mov dx, [IDEContrRegsBaseAddr] |
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483 | add dx, 8 |
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484 | mov al, 0 |
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485 | out dx, al |
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486 | .done: |
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487 | pop edx |
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488 | pop eax |
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489 | ret |
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490 | |||
491 | iglobal |
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492 | align 4 |
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493 | ; note that IDE descriptor table must be 4-byte aligned and do not cross 4K boundary |
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494 | IDE_descriptor_table: |
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495 | dd IDE_DMA |
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496 | dw 0x2000 |
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497 | dw 0x8000 |
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498 | |||
499 | dma_cur_sector dd not 40h |
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500 | dma_hdpos dd 0 |
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501 | irq14_func dd hdd_irq_null |
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502 | irq15_func dd hdd_irq_null |
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503 | endg |
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504 | |||
505 | uglobal |
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506 | ; all uglobals are zeroed at boot |
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507 | dma_process dd 0 |
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508 | dma_slot_ptr dd 0 |
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509 | cache_chain_pos dd 0 |
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510 | cache_chain_ptr dd 0 |
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511 | cache_chain_size db 0 |
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512 | cache_chain_started db 0 |
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513 | dma_task_switched db 0 |
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514 | dma_hdd db 0 |
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515 | allow_dma_access db 0 |
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516 | endg |
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517 | |||
518 | align 4 |
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519 | hdd_irq14: |
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520 | pushfd |
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521 | cli |
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522 | pushad |
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523 | mov [irq14_func], hdd_irq_null |
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524 | mov dx, [IDEContrRegsBaseAddr] |
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525 | mov al, 0 |
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526 | out dx, al |
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527 | ; call update_counters |
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528 | ; mov ebx, [dma_process] |
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529 | ; cmp [CURRENT_TASK], ebx |
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530 | ; jz .noswitch |
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531 | ; mov [dma_task_switched], 1 |
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532 | ; mov edi, [dma_slot_ptr] |
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533 | ; mov eax, [CURRENT_TASK] |
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534 | ; mov [dma_process], eax |
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535 | ; mov eax, [TASK_BASE] |
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536 | ; mov [dma_slot_ptr], eax |
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537 | ; mov [CURRENT_TASK], ebx |
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538 | ; mov [TASK_BASE], edi |
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539 | ; mov byte [DONT_SWITCH], 1 |
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540 | ; call do_change_task |
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541 | .noswitch: |
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542 | popad |
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543 | popfd |
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544 | align 4 |
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545 | hdd_irq_null: |
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546 | ret |
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547 | |||
548 | align 4 |
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549 | hdd_irq15: |
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550 | pushfd |
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551 | cli |
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552 | pushad |
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553 | mov [irq15_func], hdd_irq_null |
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554 | mov dx, [IDEContrRegsBaseAddr] |
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555 | add dx, 8 |
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556 | mov al, 0 |
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557 | out dx, al |
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558 | ; call update_counters |
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559 | ; mov ebx, [dma_process] |
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560 | ; cmp [CURRENT_TASK], ebx |
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561 | ; jz .noswitch |
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562 | ; mov [dma_task_switched], 1 |
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563 | ; mov edi, [dma_slot_ptr] |
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564 | ; mov eax, [CURRENT_TASK] |
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565 | ; mov [dma_process], eax |
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566 | ; mov eax, [TASK_BASE] |
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567 | ; mov [dma_slot_ptr], eax |
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568 | ; mov [CURRENT_TASK], ebx |
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569 | ; mov [TASK_BASE], edi |
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570 | ; mov byte [DONT_SWITCH], 1 |
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571 | ; call do_change_task |
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572 | .noswitch: |
||
573 | popad |
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574 | popfd |
||
575 | ret |
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576 | |||
577 | align 4 |
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578 | hd_read_dma: |
||
579 | push eax |
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580 | push edx |
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581 | mov edx, [dma_hdpos] |
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582 | cmp edx, [hdpos] |
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583 | jne .notread |
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584 | mov edx, [dma_cur_sector] |
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585 | cmp eax, edx |
||
586 | jb .notread |
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587 | add edx, 15 |
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588 | cmp [esp+4], edx |
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589 | ja .notread |
||
590 | mov eax, [esp+4] |
||
591 | sub eax, [dma_cur_sector] |
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592 | shl eax, 9 |
||
593 | add eax, (OS_BASE+IDE_DMA) |
||
594 | push ecx esi edi |
||
595 | mov esi, eax |
||
596 | shl edi, 9 |
||
597 | ; add edi, HD_CACHE+0x10000 |
||
598 | push eax |
||
599 | call calculate_cache_2 |
||
600 | add edi, eax |
||
601 | pop eax |
||
602 | |||
603 | mov ecx, 512/4 |
||
604 | cld |
||
605 | rep movsd |
||
606 | pop edi esi ecx |
||
607 | pop edx |
||
608 | pop eax |
||
609 | ret |
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610 | .notread: |
||
611 | mov eax, IDE_descriptor_table |
||
612 | mov dword [eax], IDE_DMA |
||
613 | mov word [eax+4], 0x2000 |
||
614 | sub eax, OS_BASE |
||
615 | mov dx, [IDEContrRegsBaseAddr] |
||
616 | cmp [hdbase], 0x1F0 |
||
617 | jz @f |
||
618 | add edx, 8 |
||
619 | @@: |
||
620 | push edx |
||
621 | add edx, 4 |
||
622 | out dx, eax |
||
623 | pop edx |
||
624 | mov al, 0 |
||
625 | out dx, al |
||
626 | add edx, 2 |
||
627 | mov al, 6 |
||
628 | out dx, al |
||
629 | call wait_for_hd_idle |
||
630 | cmp [hd_error], 0 |
||
631 | jnz hd_read_error |
||
632 | call disable_ide_int |
||
633 | xor eax, eax |
||
634 | mov edx, [hdbase] |
||
635 | inc edx |
||
636 | out dx, al |
||
637 | inc edx |
||
638 | mov eax, 10h |
||
639 | out dx, al |
||
640 | inc edx |
||
641 | mov eax, [esp+4] |
||
642 | out dx, al |
||
643 | shr eax, 8 |
||
644 | inc edx |
||
645 | out dx, al |
||
646 | shr eax, 8 |
||
647 | inc edx |
||
648 | out dx, al |
||
649 | shr eax, 8 |
||
650 | inc edx |
||
651 | and al, 0xF |
||
652 | add al, byte [hdid] |
||
653 | add al, 11100000b |
||
654 | out dx, al |
||
655 | inc edx |
||
656 | mov al, 0xC8 |
||
657 | out dx, al |
||
658 | mov dx, [IDEContrRegsBaseAddr] |
||
659 | cmp [hdbase], 0x1F0 |
||
660 | jz @f |
||
661 | add dx, 8 |
||
662 | @@: |
||
663 | mov al, 9 |
||
664 | out dx, al |
||
665 | mov eax, [CURRENT_TASK] |
||
666 | mov [dma_process], eax |
||
667 | mov eax, [TASK_BASE] |
||
668 | mov [dma_slot_ptr], eax |
||
669 | cmp [hdbase], 0x1F0 |
||
670 | jnz .ide1 |
||
671 | mov [irq14_func], hdd_irq14 |
||
672 | jmp @f |
||
673 | .ide1: |
||
674 | mov [irq15_func], hdd_irq15 |
||
675 | @@: |
||
676 | call enable_ide_int |
||
677 | cmp [hdbase], 0x1F0 |
||
678 | jnz .wait_ide1 |
||
679 | call wait_for_sector_dma_ide0 |
||
680 | jmp @f |
||
681 | .wait_ide1: |
||
682 | call wait_for_sector_dma_ide1 |
||
683 | @@: |
||
684 | cmp [hd_error], 0 |
||
685 | jnz hd_read_error |
||
686 | mov eax, [hdpos] |
||
687 | mov [dma_hdpos], eax |
||
688 | pop edx |
||
689 | pop eax |
||
690 | mov [dma_cur_sector], eax |
||
691 | jmp hd_read_dma |
||
692 | |||
693 | align 4 |
||
694 | write_cache_sector: |
||
695 | mov [cache_chain_size], 1 |
||
696 | mov [cache_chain_pos], edi |
||
697 | write_cache_chain: |
||
698 | cmp [hdpos], 0x80 |
||
699 | jae bd_write_cache_chain |
||
700 | mov eax, [cache_chain_ptr] |
||
701 | cmp dword[eax], 0x10000000 |
||
702 | jae .bad |
||
703 | push esi |
||
704 | mov eax, IDE_descriptor_table |
||
705 | mov edx, eax |
||
706 | pusha |
||
707 | mov esi, [cache_chain_pos] |
||
708 | shl esi, 9 |
||
709 | call calculate_cache_2 |
||
710 | add esi, eax |
||
711 | mov edi, (OS_BASE+IDE_DMA) |
||
712 | mov dword [edx], IDE_DMA |
||
713 | movzx ecx, [cache_chain_size] |
||
714 | shl ecx, 9 |
||
715 | mov word [edx+4], cx |
||
716 | shr ecx, 2 |
||
717 | cld |
||
718 | rep movsd |
||
719 | popa |
||
720 | sub eax, OS_BASE |
||
721 | mov dx, [IDEContrRegsBaseAddr] |
||
722 | cmp [hdbase], 0x1F0 |
||
723 | jz @f |
||
724 | add edx, 8 |
||
725 | @@: |
||
726 | push edx |
||
727 | add edx, 4 |
||
728 | out dx, eax |
||
729 | pop edx |
||
730 | mov al, 0 |
||
731 | out dx, al |
||
732 | add edx, 2 |
||
733 | mov al, 6 |
||
734 | out dx, al |
||
735 | call wait_for_hd_idle |
||
736 | cmp [hd_error], 0 |
||
737 | jnz hd_write_error_dma |
||
738 | call disable_ide_int |
||
739 | xor eax, eax |
||
740 | mov edx, [hdbase] |
||
741 | inc edx |
||
742 | out dx, al |
||
743 | inc edx |
||
744 | mov al, [cache_chain_size] |
||
745 | out dx, al |
||
746 | inc edx |
||
747 | mov esi, [cache_chain_ptr] |
||
748 | mov eax, [esi] |
||
749 | out dx, al |
||
750 | shr eax, 8 |
||
751 | inc edx |
||
752 | out dx, al |
||
753 | shr eax, 8 |
||
754 | inc edx |
||
755 | out dx, al |
||
756 | shr eax, 8 |
||
757 | inc edx |
||
758 | and al, 0xF |
||
759 | add al, byte [hdid] |
||
760 | add al, 11100000b |
||
761 | out dx, al |
||
762 | inc edx |
||
763 | mov al, 0xCA |
||
764 | out dx, al |
||
765 | mov dx, [IDEContrRegsBaseAddr] |
||
766 | cmp [hdbase], 0x1F0 |
||
767 | jz @f |
||
768 | add dx, 8 |
||
769 | @@: |
||
770 | mov al, 1 |
||
771 | out dx, al |
||
772 | mov eax, [CURRENT_TASK] |
||
773 | mov [dma_process], eax |
||
774 | mov eax, [TASK_BASE] |
||
775 | mov [dma_slot_ptr], eax |
||
776 | cmp [hdbase], 0x1F0 |
||
777 | jnz .ide1 |
||
778 | mov [irq14_func], hdd_irq14 |
||
779 | jmp @f |
||
780 | .ide1: |
||
781 | mov [irq15_func], hdd_irq15 |
||
782 | @@: |
||
783 | call enable_ide_int |
||
784 | mov [dma_cur_sector], not 0x40 |
||
785 | cmp [hdbase], 0x1F0 |
||
786 | jnz .wait_ide1 |
||
787 | call wait_for_sector_dma_ide0 |
||
788 | jmp @f |
||
789 | .wait_ide1: |
||
790 | call wait_for_sector_dma_ide1 |
||
791 | @@: |
||
792 | cmp [hd_error], 0 |
||
793 | jnz hd_write_error_dma |
||
794 | pop esi |
||
795 | ret |
||
796 | .bad: |
||
797 | inc [hd_error] |
||
798 | ret |
||
799 | |||
800 | uglobal |
||
801 | IDEContrRegsBaseAddr dw ? |
||
802 | endg |
||
803 | ; \end{Mario79} |
||
804 | |||
805 | ; \begin{diamond} |
||
806 | uglobal |
||
807 | bios_hdpos dd 0 ; 0 is invalid value for [hdpos] |
||
808 | bios_cur_sector dd ? |
||
809 | bios_read_len dd ? |
||
810 | endg |
||
811 | bd_read: |
||
812 | push eax |
||
813 | push edx |
||
814 | mov edx, [bios_hdpos] |
||
815 | cmp edx, [hdpos] |
||
816 | jne .notread |
||
817 | mov edx, [bios_cur_sector] |
||
818 | cmp eax, edx |
||
819 | jb .notread |
||
820 | add edx, [bios_read_len] |
||
821 | dec edx |
||
822 | cmp eax, edx |
||
823 | ja .notread |
||
824 | sub eax, [bios_cur_sector] |
||
825 | shl eax, 9 |
||
826 | add eax, (OS_BASE+0x9A000) |
||
827 | push ecx esi edi |
||
828 | mov esi, eax |
||
829 | shl edi, 9 |
||
830 | ; add edi, HD_CACHE+0x10000 |
||
831 | push eax |
||
832 | call calculate_cache_2 |
||
833 | add edi, eax |
||
834 | pop eax |
||
835 | |||
836 | mov ecx, 512/4 |
||
837 | cld |
||
838 | rep movsd |
||
839 | pop edi esi ecx |
||
840 | pop edx |
||
841 | pop eax |
||
842 | ret |
||
843 | .notread: |
||
844 | push ecx |
||
845 | mov dl, 42h |
||
846 | mov ecx, 16 |
||
847 | call int13_call |
||
848 | pop ecx |
||
849 | test eax, eax |
||
850 | jnz .v86err |
||
851 | test edx, edx |
||
852 | jz .readerr |
||
853 | mov [bios_read_len], edx |
||
854 | mov edx, [hdpos] |
||
855 | mov [bios_hdpos], edx |
||
856 | pop edx |
||
857 | pop eax |
||
858 | mov [bios_cur_sector], eax |
||
859 | jmp bd_read |
||
860 | .readerr: |
||
861 | .v86err: |
||
862 | mov [hd_error], 1 |
||
863 | jmp hd_read_error |
||
864 | |||
865 | bd_write_cache_chain: |
||
866 | pusha |
||
867 | mov esi, [cache_chain_pos] |
||
868 | shl esi, 9 |
||
869 | call calculate_cache_2 |
||
870 | add esi, eax |
||
871 | mov edi, OS_BASE + 0x9A000 |
||
872 | movzx ecx, [cache_chain_size] |
||
873 | push ecx |
||
874 | shl ecx, 9-2 |
||
875 | rep movsd |
||
876 | pop ecx |
||
877 | mov dl, 43h |
||
878 | mov eax, [cache_chain_ptr] |
||
879 | mov eax, [eax] |
||
880 | call int13_call |
||
881 | test eax, eax |
||
882 | jnz .v86err |
||
883 | cmp edx, ecx |
||
884 | jnz .writeerr |
||
885 | popa |
||
886 | ret |
||
887 | .v86err: |
||
888 | .writeerr: |
||
889 | popa |
||
890 | mov [hd_error], 1 |
||
891 | jmp hd_write_error |
||
892 | |||
893 | uglobal |
||
894 | int13_regs_in rb v86_regs.size |
||
895 | int13_regs_out rb v86_regs.size |
||
896 | endg |
||
897 | |||
898 | int13_call: |
||
899 | ; Because this code uses fixed addresses, |
||
900 | ; it can not be run simultaniously by many threads. |
||
901 | ; In current implementation it is protected by common mutex 'hd1_status' |
||
902 | mov word [OS_BASE + 510h], 10h ; packet length |
||
903 | mov word [OS_BASE + 512h], cx ; number of sectors |
||
904 | mov dword [OS_BASE + 514h], 9A000000h ; buffer 9A00:0000 |
||
905 | mov dword [OS_BASE + 518h], eax |
||
906 | and dword [OS_BASE + 51Ch], 0 |
||
907 | push ebx ecx esi edi |
||
908 | mov ebx, int13_regs_in |
||
909 | mov edi, ebx |
||
910 | mov ecx, v86_regs.size/4 |
||
911 | xor eax, eax |
||
912 | rep stosd |
||
913 | mov byte [ebx+v86_regs.eax+1], dl |
||
914 | mov eax, [hdpos] |
||
915 | lea eax, [BiosDisksData+(eax-80h)*4] |
||
916 | mov dl, [eax] |
||
917 | mov byte [ebx+v86_regs.edx], dl |
||
918 | movzx edx, byte [eax+1] |
||
919 | ; mov dl, 5 |
||
920 | test edx, edx |
||
921 | jnz .hasirq |
||
922 | dec edx |
||
923 | jmp @f |
||
924 | .hasirq: |
||
925 | pushad |
||
926 | stdcall enable_irq, edx |
||
927 | popad |
||
928 | @@: |
||
929 | mov word [ebx+v86_regs.esi], 510h |
||
930 | mov word [ebx+v86_regs.ss], 9000h |
||
931 | mov word [ebx+v86_regs.esp], 0A000h |
||
932 | mov word [ebx+v86_regs.eip], 500h |
||
933 | mov [ebx+v86_regs.eflags], 20200h |
||
934 | mov esi, [sys_v86_machine] |
||
935 | mov ecx, 0x502 |
||
936 | push fs |
||
937 | call v86_start |
||
938 | pop fs |
||
939 | and [bios_hdpos], 0 |
||
940 | pop edi esi ecx ebx |
||
941 | movzx edx, byte [OS_BASE + 512h] |
||
942 | test byte [int13_regs_out+v86_regs.eflags], 1 |
||
943 | jnz @f |
||
944 | mov edx, ecx |
||
945 | @@: |
||
946 | ret |
||
947 | ; \end{diamond} |