Rev 3539 | Rev 3706 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
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2288 | clevermous | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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2455 | mario79 | 3 | ;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;; |
2288 | clevermous | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
8 | $Revision: 3702 $ |
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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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3702 | mario79 | 53 | ; cmp eax, 0x10000000 |
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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2288 | clevermous | 58 | ; DMA read is permitted if [allow_dma_access]=1 or 2 |
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 | |||
3702 | mario79 | 104 | ; Выбрать нужный диск |
105 | mov edx, [hdbase] |
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106 | add edx, 6 ;адрес регистра головок |
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107 | mov al, byte [hdid] |
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108 | add al, 128+64+32 |
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109 | out dx, al; номер головки/номер диска |
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110 | |||
2288 | clevermous | 111 | call wait_for_hd_idle |
112 | cmp [hd_error], 0 |
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113 | jne hd_read_error |
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3702 | mario79 | 114 | |
115 | ; ATA with 28 or 48 bit for sector number? |
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116 | mov eax, [esp+4] |
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117 | cmp eax, 0x10000000 |
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118 | jae .lba48 |
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119 | .lba28: |
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2288 | clevermous | 120 | cli |
121 | xor eax, eax |
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122 | mov edx, [hdbase] |
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123 | inc edx |
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3539 | clevermous | 124 | out dx, al; ATAFeatures регистр "особенностей" |
2288 | clevermous | 125 | inc edx |
126 | inc eax |
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3539 | clevermous | 127 | out dx, al; ATASectorCount счётчик секторов |
2288 | clevermous | 128 | inc edx |
129 | mov eax, [esp+4] |
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3539 | clevermous | 130 | out dx, al; ATASectorNumber регистр номера сектора |
2288 | clevermous | 131 | shr eax, 8 |
132 | inc edx |
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3539 | clevermous | 133 | out dx, al; ATACylinder номер цилиндра (младший байт) |
2288 | clevermous | 134 | shr eax, 8 |
135 | inc edx |
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3539 | clevermous | 136 | out dx, al; номер цилиндра (старший байт) |
2288 | clevermous | 137 | shr eax, 8 |
138 | inc edx |
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139 | and al, 1+2+4+8 |
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140 | add al, byte [hdid] |
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141 | add al, 128+64+32 |
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3539 | clevermous | 142 | out dx, al; номер головки/номер диска |
2288 | clevermous | 143 | inc edx |
144 | mov al, 20h |
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3539 | clevermous | 145 | out dx, al; ATACommand регистр команд |
2288 | clevermous | 146 | sti |
3702 | mario79 | 147 | jmp .continue |
148 | .lba48: |
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149 | cli |
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150 | xor eax, eax |
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151 | mov edx, [hdbase] |
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152 | inc edx |
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153 | out dx, al ; Features Previous Reserved |
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154 | out dx, al ; Features Current Reserved |
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155 | inc edx |
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156 | out dx, al ; Sector Count Previous Sector count (15:8) |
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157 | inc eax |
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158 | out dx, al ; Sector Count Current Sector count (7:0) |
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159 | inc edx |
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160 | mov eax, [esp+4] |
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161 | rol eax,8 |
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162 | out dx, al ; LBA Low Previous LBA (31:24) |
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163 | xor eax,eax ; because only 32 bit cache |
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164 | inc edx |
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165 | out dx, al ; LBA Mid Previous LBA (39:32) |
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166 | inc edx |
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167 | out dx, al ; LBA High Previous LBA (47:40) |
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168 | sub edx,2 |
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169 | mov eax, [esp+4] |
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170 | out dx, al ; LBA Low Current LBA (7:0) |
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171 | shr eax, 8 |
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172 | inc edx |
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173 | out dx, al ; LBA Mid Current LBA (15:8) |
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174 | shr eax, 8 |
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175 | inc edx |
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176 | out dx, al ; LBA High Current LBA (23:16) |
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177 | inc edx |
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178 | mov al, byte [hdid] |
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179 | add al, 128+64+32 |
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180 | out dx, al; номер головки/номер диска |
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181 | inc edx |
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182 | mov al, 24h ; READ SECTOR(S) EXT |
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183 | out dx, al; ATACommand регистр команд |
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184 | sti |
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185 | .continue: |
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2288 | clevermous | 186 | call wait_for_sector_buffer |
187 | |||
188 | cmp [hd_error], 0 |
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189 | jne hd_read_error |
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190 | |||
191 | cli |
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192 | push edi |
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193 | shl edi, 9 |
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194 | ; add edi,HD_CACHE+65536 |
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195 | push eax |
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196 | call calculate_cache_2 |
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197 | add edi, eax |
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198 | pop eax |
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199 | |||
200 | mov ecx, 256 |
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201 | mov edx, [hdbase] |
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202 | cld |
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203 | rep insw |
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204 | pop edi |
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205 | sti |
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206 | |||
207 | pop edx eax |
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208 | ret |
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209 | |||
210 | disable_ide_int: |
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211 | ; mov edx,[hdbase] |
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212 | ; add edx,0x206 |
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213 | ; mov al,2 |
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214 | ; out dx,al |
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215 | cli |
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216 | ret |
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217 | |||
218 | enable_ide_int: |
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219 | ; mov edx,[hdbase] |
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220 | ; add edx,0x206 |
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221 | ; mov al,0 |
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222 | ; out dx,al |
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223 | sti |
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224 | ret |
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225 | |||
226 | align 4 |
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227 | hd_write: |
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228 | ;----------------------------------------------------------- |
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229 | ; input : eax = block |
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230 | ; ebx = pointer to memory |
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231 | ;----------------------------------------------------------- |
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232 | push ecx esi edi |
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233 | |||
234 | ; check if the cache already has the sector and overwrite it |
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235 | |||
236 | ; mov ecx,cache_max |
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237 | ; mov esi,HD_CACHE+8 |
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238 | call calculate_cache |
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239 | add esi, 8 |
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240 | |||
241 | mov edi, 1 |
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242 | |||
243 | hdwritecache: |
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244 | |||
245 | cmp dword [esi+4], 0; if cache slot is empty |
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246 | je not_in_cache_write |
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247 | |||
248 | cmp [esi], eax ; if the slot has the sector |
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249 | je yes_in_cache_write |
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250 | |||
251 | not_in_cache_write: |
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252 | |||
253 | add esi, 8 |
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254 | inc edi |
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255 | dec ecx |
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256 | jnz hdwritecache |
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257 | |||
258 | ; sector not found in cache |
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259 | ; write the block to a new location |
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260 | |||
261 | call find_empty_slot ; ret in edi |
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262 | cmp [hd_error], 0 |
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263 | jne hd_write_access_denied |
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264 | |||
265 | ; lea esi,[edi*8+HD_CACHE] |
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266 | ; push eax |
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267 | call calculate_cache_1 |
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268 | lea esi, [edi*8+esi] |
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269 | ; pop eax |
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270 | |||
271 | mov [esi], eax ; sector number |
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272 | |||
273 | yes_in_cache_write: |
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274 | |||
275 | mov dword [esi+4], 2; write - differs from hd |
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276 | |||
277 | shl edi, 9 |
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278 | ; add edi,HD_CACHE+65536 |
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279 | push eax |
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280 | call calculate_cache_2 |
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281 | add edi, eax |
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282 | pop eax |
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283 | |||
284 | mov esi, ebx |
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285 | mov ecx, 512/4 |
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286 | cld |
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287 | rep movsd ; move data |
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288 | hd_write_access_denied: |
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289 | pop edi esi ecx |
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290 | ret |
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291 | |||
292 | align 4 |
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293 | cache_write_pio: |
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294 | cmp dword[esi], 0x10000000 |
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295 | jae .bad |
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296 | ; call disable_ide_int |
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297 | |||
3702 | mario79 | 298 | ; Выбрать нужный диск |
299 | mov edx, [hdbase] |
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300 | add edx, 6 ;адрес регистра головок |
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301 | mov al, byte [hdid] |
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302 | add al, 128+64+32 |
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303 | out dx, al; номер головки/номер диска |
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304 | |||
2288 | clevermous | 305 | call wait_for_hd_idle |
306 | cmp [hd_error], 0 |
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307 | jne hd_write_error |
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308 | |||
309 | cli |
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310 | xor eax, eax |
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311 | mov edx, [hdbase] |
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312 | inc edx |
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313 | out dx, al |
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314 | inc edx |
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315 | inc eax |
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316 | out dx, al |
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317 | inc edx |
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318 | mov eax, [esi] ; eax = sector to write |
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319 | out dx, al |
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320 | shr eax, 8 |
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321 | inc edx |
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322 | out dx, al |
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323 | shr eax, 8 |
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324 | inc edx |
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325 | out dx, al |
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326 | shr eax, 8 |
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327 | inc edx |
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328 | and al, 1+2+4+8 |
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329 | add al, byte [hdid] |
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330 | add al, 128+64+32 |
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331 | out dx, al |
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332 | inc edx |
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333 | mov al, 30h |
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334 | out dx, al |
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335 | sti |
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336 | |||
337 | call wait_for_sector_buffer |
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338 | |||
339 | cmp [hd_error], 0 |
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340 | jne hd_write_error |
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341 | |||
342 | push ecx esi |
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343 | |||
344 | cli |
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345 | mov esi, edi |
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346 | shl esi, 9 |
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347 | ; add esi,HD_CACHE+65536 ; esi = from memory position |
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348 | push eax |
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349 | call calculate_cache_2 |
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350 | add esi, eax |
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351 | pop eax |
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352 | |||
353 | mov ecx, 256 |
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354 | mov edx, [hdbase] |
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355 | cld |
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356 | rep outsw |
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357 | sti |
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358 | |||
359 | ; call enable_ide_int |
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360 | pop esi ecx |
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361 | |||
362 | ret |
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363 | .bad: |
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364 | inc [hd_error] |
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365 | ret |
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366 | |||
367 | save_hd_wait_timeout: |
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368 | |||
369 | push eax |
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370 | mov eax, [timer_ticks] |
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371 | add eax, 300 ; 3 sec timeout |
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372 | mov [hd_wait_timeout], eax |
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373 | pop eax |
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374 | ret |
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375 | |||
376 | align 4 |
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377 | check_hd_wait_timeout: |
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378 | |||
379 | push eax |
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380 | mov eax, [hd_wait_timeout] |
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381 | cmp [timer_ticks], eax |
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382 | jg hd_timeout_error |
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383 | pop eax |
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384 | mov [hd_error], 0 |
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385 | ret |
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386 | |||
387 | ;iglobal |
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388 | ; hd_timeout_str db 'K : FS - HD timeout',0 |
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389 | ; hd_read_str db 'K : FS - HD read error',0 |
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390 | ; hd_write_str db 'K : FS - HD write error',0 |
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391 | ; hd_lba_str db 'K : FS - HD LBA error',0 |
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392 | ;endg |
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393 | |||
394 | hd_timeout_error: |
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395 | |||
396 | ; call clear_hd_cache |
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397 | ; call clear_application_table_status |
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398 | ; mov esi,hd_timeout_str |
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399 | ; call sys_msg_board_str |
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3309 | esevece | 400 | if lang eq sp |
401 | DEBUGF 1,"K : FS - HD tiempo de espera agotado\n" |
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402 | else |
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2288 | clevermous | 403 | DEBUGF 1,"K : FS - HD timeout\n" |
3309 | esevece | 404 | end if |
2288 | clevermous | 405 | |
406 | mov [hd_error], 1 |
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407 | pop eax |
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408 | ret |
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409 | |||
410 | hd_read_error: |
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411 | |||
412 | ; call clear_hd_cache |
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413 | ; call clear_application_table_status |
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414 | ; mov esi,hd_read_str |
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415 | ; call sys_msg_board_str |
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3309 | esevece | 416 | if lang eq sp |
417 | DEBUGF 1,"K : FS - HD error de lectura\n" |
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418 | else |
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2288 | clevermous | 419 | DEBUGF 1,"K : FS - HD read error\n" |
3309 | esevece | 420 | end if |
2288 | clevermous | 421 | pop edx eax |
422 | ret |
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423 | |||
424 | hd_write_error: |
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425 | |||
426 | ; call clear_hd_cache |
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427 | ; call clear_application_table_status |
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428 | ; mov esi,hd_write_str |
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429 | ; call sys_msg_board_str |
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3309 | esevece | 430 | if lang eq sp |
431 | DEBUGF 1,"K : FS - HD error de escritura\n" |
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432 | else |
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2288 | clevermous | 433 | DEBUGF 1,"K : FS - HD write error\n" |
3309 | esevece | 434 | end if |
2288 | clevermous | 435 | ret |
436 | |||
437 | hd_write_error_dma: |
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438 | ; call clear_hd_cache |
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439 | ; call clear_application_table_status |
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440 | ; mov esi, hd_write_str |
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441 | ; call sys_msg_board_str |
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3309 | esevece | 442 | if lang eq sp |
443 | DEBUGF 1,"K : FS - HD error de escritura\n" |
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444 | else |
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445 | DEBUGF 1,"K : FS - HD write error\n" |
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446 | end if |
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2288 | clevermous | 447 | pop esi |
448 | ret |
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449 | |||
450 | hd_lba_error: |
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451 | ; call clear_hd_cache |
||
452 | ; call clear_application_table_status |
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453 | ; mov esi,hd_lba_str |
||
454 | ; call sys_msg_board_str |
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3309 | esevece | 455 | if lang eq sp |
456 | DEBUGF 1,"K : FS - HD error en LBA\n" |
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457 | else |
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2288 | clevermous | 458 | DEBUGF 1,"K : FS - HD LBA error\n" |
3309 | esevece | 459 | end if |
2288 | clevermous | 460 | jmp LBA_read_ret |
461 | |||
462 | |||
463 | align 4 |
||
464 | wait_for_hd_idle: |
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465 | |||
466 | push eax edx |
||
467 | |||
468 | call save_hd_wait_timeout |
||
469 | |||
470 | mov edx, [hdbase] |
||
471 | add edx, 0x7 |
||
472 | |||
473 | wfhil1: |
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474 | |||
475 | call check_hd_wait_timeout |
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476 | cmp [hd_error], 0 |
||
477 | jne @f |
||
478 | |||
479 | in al, dx |
||
480 | test al, 128 |
||
481 | jnz wfhil1 |
||
482 | |||
483 | @@: |
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484 | |||
485 | pop edx eax |
||
486 | ret |
||
487 | |||
488 | |||
489 | align 4 |
||
490 | wait_for_sector_buffer: |
||
491 | |||
492 | push eax edx |
||
493 | |||
494 | mov edx, [hdbase] |
||
495 | add edx, 0x7 |
||
496 | |||
497 | call save_hd_wait_timeout |
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498 | |||
499 | hdwait_sbuf: ; wait for sector buffer to be ready |
||
500 | |||
501 | call check_hd_wait_timeout |
||
502 | cmp [hd_error], 0 |
||
503 | jne @f |
||
504 | |||
505 | in al, dx |
||
506 | test al, 8 |
||
507 | jz hdwait_sbuf |
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508 | |||
509 | mov [hd_error], 0 |
||
510 | |||
511 | cmp [hd_setup], 1 ; do not mark error for setup request |
||
512 | je buf_wait_ok |
||
513 | |||
514 | test al, 1 ; previous command ended up with an error |
||
515 | jz buf_wait_ok |
||
516 | @@: |
||
517 | mov [hd_error], 1 |
||
518 | |||
519 | buf_wait_ok: |
||
520 | |||
521 | pop edx eax |
||
522 | ret |
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523 | |||
524 | ; \begin{Mario79} |
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525 | align 4 |
||
526 | wait_for_sector_dma_ide0: |
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527 | push eax |
||
528 | push edx |
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529 | call save_hd_wait_timeout |
||
530 | .wait: |
||
531 | call change_task |
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532 | cmp [irq14_func], hdd_irq14 |
||
533 | jnz .done |
||
534 | call check_hd_wait_timeout |
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535 | cmp [hd_error], 0 |
||
536 | jz .wait |
||
537 | mov [irq14_func], hdd_irq_null |
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538 | mov dx, [IDEContrRegsBaseAddr] |
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539 | mov al, 0 |
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540 | out dx, al |
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541 | .done: |
||
542 | pop edx |
||
543 | pop eax |
||
544 | ret |
||
545 | |||
546 | align 4 |
||
547 | wait_for_sector_dma_ide1: |
||
548 | push eax |
||
549 | push edx |
||
550 | call save_hd_wait_timeout |
||
551 | .wait: |
||
552 | call change_task |
||
553 | cmp [irq15_func], hdd_irq15 |
||
554 | jnz .done |
||
555 | call check_hd_wait_timeout |
||
556 | cmp [hd_error], 0 |
||
557 | jz .wait |
||
558 | mov [irq15_func], hdd_irq_null |
||
559 | mov dx, [IDEContrRegsBaseAddr] |
||
560 | add dx, 8 |
||
561 | mov al, 0 |
||
562 | out dx, al |
||
563 | .done: |
||
564 | pop edx |
||
565 | pop eax |
||
566 | ret |
||
567 | |||
568 | iglobal |
||
569 | align 4 |
||
570 | ; note that IDE descriptor table must be 4-byte aligned and do not cross 4K boundary |
||
571 | IDE_descriptor_table: |
||
572 | dd IDE_DMA |
||
573 | dw 0x2000 |
||
574 | dw 0x8000 |
||
575 | |||
576 | dma_cur_sector dd not 40h |
||
577 | dma_hdpos dd 0 |
||
578 | irq14_func dd hdd_irq_null |
||
579 | irq15_func dd hdd_irq_null |
||
580 | endg |
||
581 | |||
582 | uglobal |
||
583 | ; all uglobals are zeroed at boot |
||
584 | dma_process dd 0 |
||
585 | dma_slot_ptr dd 0 |
||
586 | cache_chain_pos dd 0 |
||
587 | cache_chain_ptr dd 0 |
||
588 | cache_chain_size db 0 |
||
589 | cache_chain_started db 0 |
||
590 | dma_task_switched db 0 |
||
591 | dma_hdd db 0 |
||
592 | allow_dma_access db 0 |
||
593 | endg |
||
594 | |||
595 | align 4 |
||
596 | hdd_irq14: |
||
597 | pushfd |
||
598 | cli |
||
599 | pushad |
||
600 | mov [irq14_func], hdd_irq_null |
||
601 | mov dx, [IDEContrRegsBaseAddr] |
||
602 | mov al, 0 |
||
603 | out dx, al |
||
604 | ; call update_counters |
||
605 | ; mov ebx, [dma_process] |
||
606 | ; cmp [CURRENT_TASK], ebx |
||
607 | ; jz .noswitch |
||
608 | ; mov [dma_task_switched], 1 |
||
609 | ; mov edi, [dma_slot_ptr] |
||
610 | ; mov eax, [CURRENT_TASK] |
||
611 | ; mov [dma_process], eax |
||
612 | ; mov eax, [TASK_BASE] |
||
613 | ; mov [dma_slot_ptr], eax |
||
614 | ; mov [CURRENT_TASK], ebx |
||
615 | ; mov [TASK_BASE], edi |
||
616 | ; mov byte [DONT_SWITCH], 1 |
||
617 | ; call do_change_task |
||
618 | .noswitch: |
||
619 | popad |
||
620 | popfd |
||
621 | align 4 |
||
622 | hdd_irq_null: |
||
623 | ret |
||
624 | |||
625 | align 4 |
||
626 | hdd_irq15: |
||
627 | pushfd |
||
628 | cli |
||
629 | pushad |
||
630 | mov [irq15_func], hdd_irq_null |
||
631 | mov dx, [IDEContrRegsBaseAddr] |
||
632 | add dx, 8 |
||
633 | mov al, 0 |
||
634 | out dx, al |
||
635 | ; call update_counters |
||
636 | ; mov ebx, [dma_process] |
||
637 | ; cmp [CURRENT_TASK], ebx |
||
638 | ; jz .noswitch |
||
639 | ; mov [dma_task_switched], 1 |
||
640 | ; mov edi, [dma_slot_ptr] |
||
641 | ; mov eax, [CURRENT_TASK] |
||
642 | ; mov [dma_process], eax |
||
643 | ; mov eax, [TASK_BASE] |
||
644 | ; mov [dma_slot_ptr], eax |
||
645 | ; mov [CURRENT_TASK], ebx |
||
646 | ; mov [TASK_BASE], edi |
||
647 | ; mov byte [DONT_SWITCH], 1 |
||
648 | ; call do_change_task |
||
649 | .noswitch: |
||
650 | popad |
||
651 | popfd |
||
652 | ret |
||
653 | |||
654 | align 4 |
||
655 | hd_read_dma: |
||
3702 | mario79 | 656 | ; hd_read_dma use old ATA with 28 bit for sector number |
657 | cmp eax, 0x10000000 |
||
658 | jb @f |
||
659 | inc [hd_error] |
||
660 | ret |
||
661 | @@: |
||
2288 | clevermous | 662 | push eax |
663 | push edx |
||
664 | mov edx, [dma_hdpos] |
||
665 | cmp edx, [hdpos] |
||
666 | jne .notread |
||
667 | mov edx, [dma_cur_sector] |
||
668 | cmp eax, edx |
||
669 | jb .notread |
||
670 | add edx, 15 |
||
671 | cmp [esp+4], edx |
||
672 | ja .notread |
||
673 | mov eax, [esp+4] |
||
674 | sub eax, [dma_cur_sector] |
||
675 | shl eax, 9 |
||
676 | add eax, (OS_BASE+IDE_DMA) |
||
677 | push ecx esi edi |
||
678 | mov esi, eax |
||
679 | shl edi, 9 |
||
680 | ; add edi, HD_CACHE+0x10000 |
||
681 | push eax |
||
682 | call calculate_cache_2 |
||
683 | add edi, eax |
||
684 | pop eax |
||
685 | |||
686 | mov ecx, 512/4 |
||
687 | cld |
||
688 | rep movsd |
||
689 | pop edi esi ecx |
||
690 | pop edx |
||
691 | pop eax |
||
692 | ret |
||
693 | .notread: |
||
694 | mov eax, IDE_descriptor_table |
||
695 | mov dword [eax], IDE_DMA |
||
696 | mov word [eax+4], 0x2000 |
||
697 | sub eax, OS_BASE |
||
698 | mov dx, [IDEContrRegsBaseAddr] |
||
699 | cmp [hdbase], 0x1F0 |
||
700 | jz @f |
||
701 | add edx, 8 |
||
702 | @@: |
||
703 | push edx |
||
704 | add edx, 4 |
||
705 | out dx, eax |
||
706 | pop edx |
||
707 | mov al, 0 |
||
708 | out dx, al |
||
709 | add edx, 2 |
||
710 | mov al, 6 |
||
711 | out dx, al |
||
712 | call wait_for_hd_idle |
||
713 | cmp [hd_error], 0 |
||
714 | jnz hd_read_error |
||
715 | call disable_ide_int |
||
716 | xor eax, eax |
||
717 | mov edx, [hdbase] |
||
718 | inc edx |
||
719 | out dx, al |
||
720 | inc edx |
||
721 | mov eax, 10h |
||
722 | out dx, al |
||
723 | inc edx |
||
724 | mov eax, [esp+4] |
||
725 | out dx, al |
||
726 | shr eax, 8 |
||
727 | inc edx |
||
728 | out dx, al |
||
729 | shr eax, 8 |
||
730 | inc edx |
||
731 | out dx, al |
||
732 | shr eax, 8 |
||
733 | inc edx |
||
734 | and al, 0xF |
||
735 | add al, byte [hdid] |
||
736 | add al, 11100000b |
||
737 | out dx, al |
||
738 | inc edx |
||
739 | mov al, 0xC8 |
||
740 | out dx, al |
||
741 | mov dx, [IDEContrRegsBaseAddr] |
||
742 | cmp [hdbase], 0x1F0 |
||
743 | jz @f |
||
744 | add dx, 8 |
||
745 | @@: |
||
746 | mov al, 9 |
||
747 | out dx, al |
||
748 | mov eax, [CURRENT_TASK] |
||
749 | mov [dma_process], eax |
||
750 | mov eax, [TASK_BASE] |
||
751 | mov [dma_slot_ptr], eax |
||
752 | cmp [hdbase], 0x1F0 |
||
753 | jnz .ide1 |
||
754 | mov [irq14_func], hdd_irq14 |
||
755 | jmp @f |
||
756 | .ide1: |
||
757 | mov [irq15_func], hdd_irq15 |
||
758 | @@: |
||
759 | call enable_ide_int |
||
760 | cmp [hdbase], 0x1F0 |
||
761 | jnz .wait_ide1 |
||
762 | call wait_for_sector_dma_ide0 |
||
763 | jmp @f |
||
764 | .wait_ide1: |
||
765 | call wait_for_sector_dma_ide1 |
||
766 | @@: |
||
767 | cmp [hd_error], 0 |
||
768 | jnz hd_read_error |
||
769 | mov eax, [hdpos] |
||
770 | mov [dma_hdpos], eax |
||
771 | pop edx |
||
772 | pop eax |
||
773 | mov [dma_cur_sector], eax |
||
774 | jmp hd_read_dma |
||
775 | |||
776 | align 4 |
||
777 | write_cache_sector: |
||
778 | mov [cache_chain_size], 1 |
||
779 | mov [cache_chain_pos], edi |
||
780 | write_cache_chain: |
||
781 | cmp [hdpos], 0x80 |
||
782 | jae bd_write_cache_chain |
||
783 | mov eax, [cache_chain_ptr] |
||
784 | cmp dword[eax], 0x10000000 |
||
785 | jae .bad |
||
786 | push esi |
||
787 | mov eax, IDE_descriptor_table |
||
788 | mov edx, eax |
||
789 | pusha |
||
790 | mov esi, [cache_chain_pos] |
||
791 | shl esi, 9 |
||
792 | call calculate_cache_2 |
||
793 | add esi, eax |
||
794 | mov edi, (OS_BASE+IDE_DMA) |
||
795 | mov dword [edx], IDE_DMA |
||
796 | movzx ecx, [cache_chain_size] |
||
797 | shl ecx, 9 |
||
798 | mov word [edx+4], cx |
||
799 | shr ecx, 2 |
||
800 | cld |
||
801 | rep movsd |
||
802 | popa |
||
803 | sub eax, OS_BASE |
||
804 | mov dx, [IDEContrRegsBaseAddr] |
||
805 | cmp [hdbase], 0x1F0 |
||
806 | jz @f |
||
807 | add edx, 8 |
||
808 | @@: |
||
809 | push edx |
||
810 | add edx, 4 |
||
811 | out dx, eax |
||
812 | pop edx |
||
813 | mov al, 0 |
||
814 | out dx, al |
||
815 | add edx, 2 |
||
816 | mov al, 6 |
||
817 | out dx, al |
||
818 | call wait_for_hd_idle |
||
819 | cmp [hd_error], 0 |
||
820 | jnz hd_write_error_dma |
||
821 | call disable_ide_int |
||
822 | xor eax, eax |
||
823 | mov edx, [hdbase] |
||
824 | inc edx |
||
825 | out dx, al |
||
826 | inc edx |
||
827 | mov al, [cache_chain_size] |
||
828 | out dx, al |
||
829 | inc edx |
||
830 | mov esi, [cache_chain_ptr] |
||
831 | mov eax, [esi] |
||
832 | out dx, al |
||
833 | shr eax, 8 |
||
834 | inc edx |
||
835 | out dx, al |
||
836 | shr eax, 8 |
||
837 | inc edx |
||
838 | out dx, al |
||
839 | shr eax, 8 |
||
840 | inc edx |
||
841 | and al, 0xF |
||
842 | add al, byte [hdid] |
||
843 | add al, 11100000b |
||
844 | out dx, al |
||
845 | inc edx |
||
846 | mov al, 0xCA |
||
847 | out dx, al |
||
848 | mov dx, [IDEContrRegsBaseAddr] |
||
849 | cmp [hdbase], 0x1F0 |
||
850 | jz @f |
||
851 | add dx, 8 |
||
852 | @@: |
||
853 | mov al, 1 |
||
854 | out dx, al |
||
855 | mov eax, [CURRENT_TASK] |
||
856 | mov [dma_process], eax |
||
857 | mov eax, [TASK_BASE] |
||
858 | mov [dma_slot_ptr], eax |
||
859 | cmp [hdbase], 0x1F0 |
||
860 | jnz .ide1 |
||
861 | mov [irq14_func], hdd_irq14 |
||
862 | jmp @f |
||
863 | .ide1: |
||
864 | mov [irq15_func], hdd_irq15 |
||
865 | @@: |
||
866 | call enable_ide_int |
||
867 | mov [dma_cur_sector], not 0x40 |
||
868 | cmp [hdbase], 0x1F0 |
||
869 | jnz .wait_ide1 |
||
870 | call wait_for_sector_dma_ide0 |
||
871 | jmp @f |
||
872 | .wait_ide1: |
||
873 | call wait_for_sector_dma_ide1 |
||
874 | @@: |
||
875 | cmp [hd_error], 0 |
||
876 | jnz hd_write_error_dma |
||
877 | pop esi |
||
878 | ret |
||
879 | .bad: |
||
880 | inc [hd_error] |
||
881 | ret |
||
882 | |||
883 | uglobal |
||
884 | IDEContrRegsBaseAddr dw ? |
||
3702 | mario79 | 885 | IDEContrProgrammingInterface dw ? |
886 | IDE_BAR0_val dw ? |
||
887 | IDE_BAR1_val dw ? |
||
888 | IDE_BAR2_val dw ? |
||
889 | IDE_BAR3_val dw ? |
||
2288 | clevermous | 890 | endg |
891 | ; \end{Mario79} |
||
892 | |||
893 | ; \begin{diamond} |
||
894 | uglobal |
||
895 | bios_hdpos dd 0 ; 0 is invalid value for [hdpos] |
||
896 | bios_cur_sector dd ? |
||
897 | bios_read_len dd ? |
||
898 | endg |
||
899 | bd_read: |
||
900 | push eax |
||
901 | push edx |
||
902 | mov edx, [bios_hdpos] |
||
903 | cmp edx, [hdpos] |
||
904 | jne .notread |
||
905 | mov edx, [bios_cur_sector] |
||
906 | cmp eax, edx |
||
907 | jb .notread |
||
908 | add edx, [bios_read_len] |
||
909 | dec edx |
||
910 | cmp eax, edx |
||
911 | ja .notread |
||
912 | sub eax, [bios_cur_sector] |
||
913 | shl eax, 9 |
||
914 | add eax, (OS_BASE+0x9A000) |
||
915 | push ecx esi edi |
||
916 | mov esi, eax |
||
917 | shl edi, 9 |
||
918 | ; add edi, HD_CACHE+0x10000 |
||
919 | push eax |
||
920 | call calculate_cache_2 |
||
921 | add edi, eax |
||
922 | pop eax |
||
923 | |||
924 | mov ecx, 512/4 |
||
925 | cld |
||
926 | rep movsd |
||
927 | pop edi esi ecx |
||
928 | pop edx |
||
929 | pop eax |
||
930 | ret |
||
931 | .notread: |
||
932 | push ecx |
||
933 | mov dl, 42h |
||
934 | mov ecx, 16 |
||
935 | call int13_call |
||
936 | pop ecx |
||
937 | test eax, eax |
||
938 | jnz .v86err |
||
939 | test edx, edx |
||
940 | jz .readerr |
||
941 | mov [bios_read_len], edx |
||
942 | mov edx, [hdpos] |
||
943 | mov [bios_hdpos], edx |
||
944 | pop edx |
||
945 | pop eax |
||
946 | mov [bios_cur_sector], eax |
||
947 | jmp bd_read |
||
948 | .readerr: |
||
949 | .v86err: |
||
950 | mov [hd_error], 1 |
||
951 | jmp hd_read_error |
||
952 | |||
953 | bd_write_cache_chain: |
||
954 | pusha |
||
955 | mov esi, [cache_chain_pos] |
||
956 | shl esi, 9 |
||
957 | call calculate_cache_2 |
||
958 | add esi, eax |
||
959 | mov edi, OS_BASE + 0x9A000 |
||
960 | movzx ecx, [cache_chain_size] |
||
961 | push ecx |
||
962 | shl ecx, 9-2 |
||
963 | rep movsd |
||
964 | pop ecx |
||
965 | mov dl, 43h |
||
966 | mov eax, [cache_chain_ptr] |
||
967 | mov eax, [eax] |
||
968 | call int13_call |
||
969 | test eax, eax |
||
970 | jnz .v86err |
||
971 | cmp edx, ecx |
||
972 | jnz .writeerr |
||
973 | popa |
||
974 | ret |
||
975 | .v86err: |
||
976 | .writeerr: |
||
977 | popa |
||
978 | mov [hd_error], 1 |
||
979 | jmp hd_write_error |
||
980 | |||
981 | uglobal |
||
2384 | hidnplayr | 982 | int13_regs_in rb sizeof.v86_regs |
983 | int13_regs_out rb sizeof.v86_regs |
||
2288 | clevermous | 984 | endg |
985 | |||
986 | int13_call: |
||
987 | ; Because this code uses fixed addresses, |
||
988 | ; it can not be run simultaniously by many threads. |
||
989 | ; In current implementation it is protected by common mutex 'hd1_status' |
||
990 | mov word [OS_BASE + 510h], 10h ; packet length |
||
991 | mov word [OS_BASE + 512h], cx ; number of sectors |
||
992 | mov dword [OS_BASE + 514h], 9A000000h ; buffer 9A00:0000 |
||
993 | mov dword [OS_BASE + 518h], eax |
||
994 | and dword [OS_BASE + 51Ch], 0 |
||
995 | push ebx ecx esi edi |
||
996 | mov ebx, int13_regs_in |
||
997 | mov edi, ebx |
||
2384 | hidnplayr | 998 | mov ecx, sizeof.v86_regs/4 |
2288 | clevermous | 999 | xor eax, eax |
1000 | rep stosd |
||
1001 | mov byte [ebx+v86_regs.eax+1], dl |
||
1002 | mov eax, [hdpos] |
||
1003 | lea eax, [BiosDisksData+(eax-80h)*4] |
||
1004 | mov dl, [eax] |
||
1005 | mov byte [ebx+v86_regs.edx], dl |
||
1006 | movzx edx, byte [eax+1] |
||
1007 | ; mov dl, 5 |
||
1008 | test edx, edx |
||
1009 | jnz .hasirq |
||
1010 | dec edx |
||
1011 | jmp @f |
||
1012 | .hasirq: |
||
1013 | pushad |
||
1014 | stdcall enable_irq, edx |
||
1015 | popad |
||
1016 | @@: |
||
1017 | mov word [ebx+v86_regs.esi], 510h |
||
1018 | mov word [ebx+v86_regs.ss], 9000h |
||
1019 | mov word [ebx+v86_regs.esp], 0A000h |
||
1020 | mov word [ebx+v86_regs.eip], 500h |
||
1021 | mov [ebx+v86_regs.eflags], 20200h |
||
1022 | mov esi, [sys_v86_machine] |
||
1023 | mov ecx, 0x502 |
||
1024 | push fs |
||
1025 | call v86_start |
||
1026 | pop fs |
||
1027 | and [bios_hdpos], 0 |
||
1028 | pop edi esi ecx ebx |
||
1029 | movzx edx, byte [OS_BASE + 512h] |
||
1030 | test byte [int13_regs_out+v86_regs.eflags], 1 |
||
1031 | jnz @f |
||
1032 | mov edx, ecx |
||
1033 | @@: |
||
1034 | ret |
||
1035 | ; \end{diamond} |
||
2643 | clevermous | 1036 | |
1037 | reserve_hd1: |
||
1038 | |||
1039 | cli |
||
1040 | cmp [hd1_status], 0 |
||
1041 | je reserve_ok1 |
||
1042 | |||
1043 | sti |
||
1044 | call change_task |
||
1045 | jmp reserve_hd1 |
||
1046 | |||
1047 | reserve_ok1: |
||
1048 | |||
1049 | push eax |
||
1050 | mov eax, [CURRENT_TASK] |
||
1051 | shl eax, 5 |
||
1052 | mov eax, [eax+CURRENT_TASK+TASKDATA.pid] |
||
1053 | mov [hd1_status], eax |
||
1054 | pop eax |
||
1055 | sti |
||
1056 | ret |
||
1057 | ;******************************************** |
||
1058 | |||
1059 | uglobal |
||
1060 | hd_in_cache db ? |
||
1061 | endg |
||
1062 | |||
1063 | reserve_hd_channel: |
||
1064 | ; BIOS disk accesses are protected with common mutex hd1_status |
||
1065 | ; This must be modified when hd1_status will not be valid! |
||
1066 | cmp [hdpos], 0x80 |
||
1067 | jae .ret |
||
1068 | cmp [hdbase], 0x1F0 |
||
1069 | jne .IDE_Channel_2 |
||
1070 | .IDE_Channel_1: |
||
1071 | cli |
||
1072 | cmp [IDE_Channel_1], 0 |
||
1073 | je .reserve_ok_1 |
||
1074 | sti |
||
1075 | call change_task |
||
1076 | jmp .IDE_Channel_1 |
||
1077 | .IDE_Channel_2: |
||
1078 | cli |
||
1079 | cmp [IDE_Channel_2], 0 |
||
1080 | je .reserve_ok_2 |
||
1081 | sti |
||
1082 | call change_task |
||
1083 | jmp .IDE_Channel_2 |
||
1084 | .reserve_ok_1: |
||
1085 | mov [IDE_Channel_1], 1 |
||
1086 | push eax |
||
1087 | mov al, 1 |
||
1088 | jmp @f |
||
1089 | .reserve_ok_2: |
||
1090 | mov [IDE_Channel_2], 1 |
||
1091 | push eax |
||
1092 | mov al, 3 |
||
1093 | @@: |
||
1094 | cmp [hdid], 1 |
||
1095 | sbb al, -1 |
||
1096 | mov [hd_in_cache], al |
||
1097 | pop eax |
||
1098 | sti |
||
1099 | .ret: |
||
1100 | ret |
||
1101 | |||
1102 | free_hd_channel: |
||
1103 | ; see comment at reserve_hd_channel |
||
1104 | cmp [hdpos], 0x80 |
||
1105 | jae .ret |
||
1106 | cmp [hdbase], 0x1F0 |
||
1107 | jne .IDE_Channel_2 |
||
1108 | .IDE_Channel_1: |
||
1109 | mov [IDE_Channel_1], 0 |
||
1110 | .ret: |
||
1111 | ret |
||
1112 | .IDE_Channel_2: |
||
1113 | mov [IDE_Channel_2], 0 |
||
1114 | ret |
||
1115 | ;******************************************** |