Rev 5787 | Rev 5792 | 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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5363 | yogev_ezra | 3 | ;; Copyright (C) KolibriOS team 2004-2015. 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: 5791 $ |
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9 | |||
10 | |||
11 | MEM_WB equ 6 ;write-back memory |
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12 | MEM_WC equ 1 ;write combined memory |
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13 | MEM_UC equ 0 ;uncached memory |
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14 | |||
15 | align 4 |
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16 | proc mem_test |
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17 | ; if we have BIOS with fn E820, skip the test |
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3732 | Serge | 18 | cmp dword [BOOT_VARS-OS_BASE + 0x9100], 0 |
2288 | clevermous | 19 | jnz .ret |
20 | |||
21 | mov eax, cr0 |
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22 | and eax, not (CR0_CD+CR0_NW) |
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23 | or eax, CR0_CD ;disable caching |
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24 | mov cr0, eax |
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25 | wbinvd ;invalidate cache |
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26 | |||
27 | xor edi, edi |
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28 | mov ebx, 'TEST' |
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29 | @@: |
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30 | add edi, 0x100000 |
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31 | xchg ebx, dword [edi] |
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32 | cmp dword [edi], 'TEST' |
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33 | xchg ebx, dword [edi] |
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34 | je @b |
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35 | |||
36 | and eax, not (CR0_CD+CR0_NW) ;enable caching |
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37 | mov cr0, eax |
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3732 | Serge | 38 | inc dword [BOOT_VARS-OS_BASE + 0x9100] |
2288 | clevermous | 39 | xor eax, eax |
3732 | Serge | 40 | mov [BOOT_VARS-OS_BASE + 0x9104], eax |
41 | mov [BOOT_VARS-OS_BASE + 0x9108], eax |
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42 | mov [BOOT_VARS-OS_BASE + 0x910C], edi |
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43 | mov [BOOT_VARS-OS_BASE + 0x9110], eax |
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4390 | clevermous | 44 | inc eax |
45 | mov [BOOT_VARS-OS_BASE + 0x9114], eax |
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2288 | clevermous | 46 | .ret: |
47 | ret |
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48 | endp |
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49 | |||
50 | align 4 |
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51 | proc init_mem |
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52 | ; calculate maximum allocatable address and number of allocatable pages |
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3732 | Serge | 53 | mov edi, BOOT_VARS-OS_BASE + 0x9104 |
2288 | clevermous | 54 | mov ecx, [edi-4] |
55 | xor esi, esi; esi will hold total amount of memory |
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56 | xor edx, edx; edx will hold maximum allocatable address |
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57 | .calcmax: |
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58 | ; round all to pages |
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59 | mov eax, [edi] |
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2466 | Serge | 60 | cmp [edi+16], byte 1 |
61 | jne .unusable |
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62 | |||
2288 | clevermous | 63 | test eax, 0xFFF |
64 | jz @f |
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65 | neg eax |
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66 | and eax, 0xFFF |
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67 | add [edi], eax |
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68 | adc dword [edi+4], 0 |
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69 | sub [edi+8], eax |
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70 | sbb dword [edi+12], 0 |
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71 | jc .unusable |
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72 | @@: |
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73 | and dword [edi+8], not 0xFFF |
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74 | jz .unusable |
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75 | ; ignore memory after 4 Gb |
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76 | cmp dword [edi+4], 0 |
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77 | jnz .unusable |
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78 | mov eax, [edi] |
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79 | cmp dword [edi+12], 0 |
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80 | jnz .overflow |
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81 | add eax, [edi+8] |
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82 | jnc @f |
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83 | .overflow: |
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84 | mov eax, 0xFFFFF000 |
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85 | @@: |
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86 | cmp edx, eax |
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87 | jae @f |
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88 | mov edx, eax |
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89 | @@: |
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90 | sub eax, [edi] |
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91 | mov [edi+8], eax |
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92 | add esi, eax |
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93 | jmp .usable |
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94 | .unusable: |
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2466 | Serge | 95 | ; and dword [edi+8], 0 |
2288 | clevermous | 96 | .usable: |
97 | add edi, 20 |
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98 | loop .calcmax |
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99 | .calculated: |
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100 | mov [MEM_AMOUNT-OS_BASE], esi |
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101 | mov [pg_data.mem_amount-OS_BASE], esi |
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102 | shr esi, 12 |
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103 | mov [pg_data.pages_count-OS_BASE], esi |
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104 | |||
105 | shr edx, 12 |
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106 | add edx, 31 |
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107 | and edx, not 31 |
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108 | shr edx, 3 |
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109 | mov [pg_data.pagemap_size-OS_BASE], edx |
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110 | |||
111 | add edx, (sys_pgmap-OS_BASE)+4095 |
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112 | and edx, not 4095 |
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113 | mov [tmp_page_tabs], edx |
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114 | |||
115 | mov edx, esi |
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116 | and edx, -1024 |
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117 | cmp edx, (OS_BASE/4096) |
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118 | jbe @F |
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119 | mov edx, (OS_BASE/4096) |
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120 | jmp .set |
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121 | @@: |
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122 | cmp edx, (HEAP_BASE-OS_BASE+HEAP_MIN_SIZE)/4096 |
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123 | jae .set |
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124 | mov edx, (HEAP_BASE-OS_BASE+HEAP_MIN_SIZE)/4096 |
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125 | .set: |
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126 | mov [pg_data.kernel_pages-OS_BASE], edx |
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127 | shr edx, 10 |
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128 | mov [pg_data.kernel_tables-OS_BASE], edx |
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129 | |||
130 | xor eax, eax |
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5130 | serge | 131 | mov edi, sys_proc-OS_BASE |
132 | mov ecx, 8192/4 |
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2288 | clevermous | 133 | cld |
134 | rep stosd |
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135 | |||
5130 | serge | 136 | mov edx, (sys_proc-OS_BASE+PROC.pdt_0)+ 0x800; (OS_BASE shr 20) |
2288 | clevermous | 137 | bt [cpu_caps-OS_BASE], CAPS_PSE |
138 | jnc .no_PSE |
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139 | |||
140 | mov ebx, cr4 |
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141 | or ebx, CR4_PSE |
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5356 | serge | 142 | mov eax, PDE_LARGE+PG_SWR |
2288 | clevermous | 143 | mov cr4, ebx |
144 | dec [pg_data.kernel_tables-OS_BASE] |
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145 | |||
146 | mov [edx], eax |
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147 | add edx, 4 |
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148 | |||
149 | mov edi, [tmp_page_tabs] |
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150 | jmp .map_kernel_heap ; new kernel fits to the first 4Mb - nothing to do with ".map_low" |
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151 | .no_PSE: |
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5356 | serge | 152 | mov eax, PG_SWR |
2288 | clevermous | 153 | mov ecx, [tmp_page_tabs] |
154 | shr ecx, 12 |
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155 | .map_low: |
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156 | mov edi, [tmp_page_tabs] |
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157 | @@: ; |
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158 | stosd |
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159 | add eax, 0x1000 |
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160 | dec ecx |
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161 | jnz @B |
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162 | |||
163 | .map_kernel_heap: |
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164 | mov ecx, [pg_data.kernel_tables-OS_BASE] |
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165 | shl ecx, 10 |
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166 | xor eax, eax |
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167 | rep stosd |
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168 | |||
169 | mov ecx, [pg_data.kernel_tables-OS_BASE] |
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170 | mov eax, [tmp_page_tabs] |
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5356 | serge | 171 | or eax, PG_SWR |
2288 | clevermous | 172 | mov edi, edx |
173 | |||
174 | .map_kernel_tabs: |
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175 | stosd |
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176 | add eax, 0x1000 |
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177 | dec ecx |
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178 | jnz .map_kernel_tabs |
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179 | |||
5356 | serge | 180 | mov dword [sys_proc-OS_BASE+PROC.pdt_0+(page_tabs shr 20)], sys_proc+PROC.pdt_0+PG_SWR-OS_BASE |
2288 | clevermous | 181 | |
5130 | serge | 182 | mov edi, (sys_proc+PROC.pdt_0-OS_BASE) |
2288 | clevermous | 183 | lea esi, [edi+(OS_BASE shr 20)] |
184 | movsd |
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185 | movsd |
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186 | ret |
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187 | endp |
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188 | |||
189 | align 4 |
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190 | proc init_page_map |
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191 | ; mark all memory as unavailable |
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192 | mov edi, sys_pgmap-OS_BASE |
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193 | mov ecx, [pg_data.pagemap_size-OS_BASE] |
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194 | shr ecx, 2 |
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195 | xor eax, eax |
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196 | cld |
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197 | rep stosd |
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198 | |||
199 | ; scan through memory map and mark free areas as available |
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3732 | Serge | 200 | mov ebx, BOOT_VARS-OS_BASE + 0x9104 |
2288 | clevermous | 201 | mov edx, [ebx-4] |
202 | .scanmap: |
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2466 | Serge | 203 | cmp [ebx+16], byte 1 |
204 | jne .next |
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205 | |||
2288 | clevermous | 206 | mov ecx, [ebx+8] |
207 | shr ecx, 12; ecx = number of pages |
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208 | jz .next |
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209 | mov edi, [ebx] |
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210 | shr edi, 12; edi = first page |
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211 | mov eax, edi |
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212 | shr edi, 5 |
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213 | shl edi, 2 |
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214 | add edi, sys_pgmap-OS_BASE |
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215 | and eax, 31 |
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216 | jz .startok |
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217 | add ecx, eax |
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218 | sub ecx, 32 |
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219 | jbe .onedword |
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220 | push ecx |
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221 | mov ecx, eax |
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222 | or eax, -1 |
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223 | shl eax, cl |
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224 | or [edi], eax |
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225 | add edi, 4 |
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226 | pop ecx |
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227 | .startok: |
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228 | push ecx |
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229 | shr ecx, 5 |
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230 | or eax, -1 |
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231 | rep stosd |
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232 | pop ecx |
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233 | and ecx, 31 |
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234 | neg eax |
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235 | shl eax, cl |
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236 | dec eax |
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237 | or [edi], eax |
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238 | jmp .next |
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239 | .onedword: |
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240 | add ecx, 32 |
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241 | sub ecx, eax |
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242 | @@: |
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243 | bts [edi], eax |
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244 | inc eax |
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245 | loop @b |
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246 | .next: |
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247 | add ebx, 20 |
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248 | dec edx |
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249 | jnz .scanmap |
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250 | |||
251 | ; mark kernel memory as allocated (unavailable) |
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252 | mov ecx, [tmp_page_tabs] |
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253 | mov edx, [pg_data.pages_count-OS_BASE] |
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254 | shr ecx, 12 |
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255 | add ecx, [pg_data.kernel_tables-OS_BASE] |
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256 | sub edx, ecx |
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257 | mov [pg_data.pages_free-OS_BASE], edx |
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258 | |||
259 | mov edi, sys_pgmap-OS_BASE |
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260 | mov ebx, ecx |
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261 | shr ecx, 5 |
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262 | xor eax, eax |
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263 | rep stosd |
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264 | |||
265 | not eax |
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266 | mov ecx, ebx |
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267 | and ecx, 31 |
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268 | shl eax, cl |
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269 | and [edi], eax |
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270 | add edi, OS_BASE |
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271 | mov [page_start-OS_BASE], edi; |
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272 | |||
273 | mov ebx, sys_pgmap |
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274 | add ebx, [pg_data.pagemap_size-OS_BASE] |
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275 | mov [page_end-OS_BASE], ebx |
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276 | |||
277 | ret |
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278 | endp |
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279 | |||
280 | align 4 |
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281 | |||
282 | init_BIOS32: |
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283 | mov edi, 0xE0000 |
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284 | .pcibios_nxt: |
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285 | cmp dword[edi], '_32_'; "magic" word |
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286 | je .BIOS32_found |
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287 | .pcibios_nxt2: |
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288 | add edi, 0x10 |
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289 | cmp edi, 0xFFFF0 |
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290 | je .BIOS32_not_found |
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291 | jmp .pcibios_nxt |
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292 | .BIOS32_found: ; magic word found, check control summ |
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293 | |||
294 | movzx ecx, byte[edi + 9] |
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295 | shl ecx, 4 |
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296 | mov esi, edi |
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297 | xor eax, eax |
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298 | cld ; paranoia |
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299 | @@: |
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300 | lodsb |
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301 | add ah, al |
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302 | loop @b |
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303 | jnz .pcibios_nxt2; control summ must be zero |
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304 | ; BIOS32 service found ! |
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305 | mov ebp, [edi + 4] |
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306 | mov [bios32_entry], ebp |
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307 | ; check PCI BIOS present |
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308 | mov eax, '$PCI' |
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309 | xor ebx, ebx |
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310 | push cs ; special for 'ret far' from BIOS |
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311 | call ebp |
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312 | test al, al |
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313 | jnz .PCI_BIOS32_not_found |
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314 | |||
3539 | clevermous | 315 | ; здесь создаются дискрипторы для PCI BIOS |
2288 | clevermous | 316 | |
317 | add ebx, OS_BASE |
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318 | dec ecx |
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319 | mov [(pci_code_32-OS_BASE)], cx ;limit 0-15 |
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320 | mov [(pci_data_32-OS_BASE)], cx ;limit 0-15 |
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321 | |||
322 | mov [(pci_code_32-OS_BASE)+2], bx ;base 0-15 |
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323 | mov [(pci_data_32-OS_BASE)+2], bx ;base 0-15 |
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324 | |||
325 | shr ebx, 16 |
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326 | mov [(pci_code_32-OS_BASE)+4], bl ;base 16-23 |
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327 | mov [(pci_data_32-OS_BASE)+4], bl ;base 16-23 |
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328 | |||
329 | shr ecx, 16 |
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330 | and cl, 0x0F |
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331 | mov ch, bh |
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332 | add cx, D32 |
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333 | mov [(pci_code_32-OS_BASE)+6], cx ;lim 16-19 & |
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334 | mov [(pci_data_32-OS_BASE)+6], cx ;base 24-31 |
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335 | |||
336 | mov [(pci_bios_entry-OS_BASE)], edx |
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337 | ; jmp .end |
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338 | .PCI_BIOS32_not_found: |
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3539 | clevermous | 339 | ; здесь должна заполнятся pci_emu_dat |
2288 | clevermous | 340 | .BIOS32_not_found: |
341 | .end: |
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342 | ret |
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343 | |||
344 | align 4 |
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345 | proc test_cpu |
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346 | locals |
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347 | cpu_type dd ? |
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348 | endl |
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349 | |||
350 | xor eax, eax |
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351 | mov [cpu_type], eax |
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352 | mov [cpu_caps-OS_BASE], eax |
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353 | mov [cpu_caps+4-OS_BASE], eax |
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4593 | clevermous | 354 | mov [cpu_phys_addr_width-OS_BASE], 32 |
2288 | clevermous | 355 | |
356 | pushfd |
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357 | pop eax |
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358 | mov ecx, eax |
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359 | xor eax, 0x40000 |
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360 | push eax |
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361 | popfd |
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362 | pushfd |
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363 | pop eax |
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364 | xor eax, ecx |
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365 | mov [cpu_type], CPU_386 |
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366 | jz .end_cpuid |
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367 | push ecx |
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368 | popfd |
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369 | |||
370 | mov [cpu_type], CPU_486 |
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371 | mov eax, ecx |
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372 | xor eax, 0x200000 |
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373 | push eax |
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374 | popfd |
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375 | pushfd |
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376 | pop eax |
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377 | xor eax, ecx |
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378 | je .end_cpuid |
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379 | |||
380 | xor eax, eax |
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381 | cpuid |
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382 | |||
383 | mov [cpu_vendor-OS_BASE], ebx |
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384 | mov [cpu_vendor+4-OS_BASE], edx |
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385 | mov [cpu_vendor+8-OS_BASE], ecx |
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4593 | clevermous | 386 | |
2288 | clevermous | 387 | cmp eax, 1 |
388 | jl .end_cpuid |
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389 | mov eax, 1 |
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390 | cpuid |
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391 | mov [cpu_sign-OS_BASE], eax |
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392 | mov [cpu_info-OS_BASE], ebx |
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393 | mov [cpu_caps-OS_BASE], edx |
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394 | mov [cpu_caps+4-OS_BASE], ecx |
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395 | |||
4593 | clevermous | 396 | bt edx, CAPS_PAE |
397 | jnc @f |
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398 | mov [cpu_phys_addr_width-OS_BASE], 36 |
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399 | @@: |
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400 | mov eax, 0x80000000 |
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401 | cpuid |
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402 | cmp eax, 0x80000008 |
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403 | jb @f |
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404 | mov eax, 0x80000008 |
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405 | cpuid |
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406 | mov [cpu_phys_addr_width-OS_BASE], al |
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407 | @@: |
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408 | |||
409 | mov eax, [cpu_sign-OS_BASE] |
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2288 | clevermous | 410 | shr eax, 8 |
411 | and eax, 0x0f |
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412 | ret |
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413 | .end_cpuid: |
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414 | mov eax, [cpu_type] |
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415 | ret |
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416 | endp |
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417 | |||
2443 | Serge | 418 | iglobal |
419 | align 4 |
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420 | acpi_lapic_base dd 0xfee00000 ; default local apic base |
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421 | endg |
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422 | |||
2288 | clevermous | 423 | uglobal |
424 | align 4 |
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425 | acpi_rsdp rd 1 |
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426 | acpi_rsdt rd 1 |
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427 | acpi_madt rd 1 |
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428 | |||
429 | acpi_dev_data rd 1 |
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430 | acpi_dev_size rd 1 |
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431 | |||
432 | acpi_rsdt_base rd 1 |
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3732 | Serge | 433 | acpi_fadt_base rd 1 |
434 | acpi_dsdt_base rd 1 |
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435 | acpi_dsdt_size rd 1 |
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2288 | clevermous | 436 | acpi_madt_base rd 1 |
437 | acpi_ioapic_base rd 1 |
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5787 | serge | 438 | acpi_hpet_base rd 1 |
439 | hpet_base rd 1 |
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440 | hpet_period rd 1 |
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441 | hpet_timers rd 1 |
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2443 | Serge | 442 | |
443 | cpu_count rd 1 |
||
444 | smpt rd 16 |
||
2288 | clevermous | 445 | endg |
446 | |||
447 | ACPI_HI_RSDP_WINDOW_START equ 0x000E0000 |
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448 | ACPI_HI_RSDP_WINDOW_END equ 0x00100000 |
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449 | ACPI_RSDP_CHECKSUM_LENGTH equ 20 |
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5787 | serge | 450 | |
451 | ACPI_HPET_SIGN equ 0x54455048 |
||
2288 | clevermous | 452 | ACPI_MADT_SIGN equ 0x43495041 |
3732 | Serge | 453 | ACPI_FADT_SIGN equ 0x50434146 |
2288 | clevermous | 454 | |
455 | |||
456 | acpi_locate: |
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457 | push ebx |
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458 | mov ebx, ACPI_HI_RSDP_WINDOW_START |
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459 | .check: |
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460 | cmp [ebx], dword 0x20445352 |
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461 | jne .next |
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462 | cmp [ebx+4], dword 0x20525450 |
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463 | jne .next |
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464 | |||
465 | mov edx, ebx |
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466 | mov ecx, ACPI_RSDP_CHECKSUM_LENGTH |
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467 | xor eax, eax |
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468 | .sum: |
||
469 | add al, [edx] |
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470 | inc edx |
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471 | loop .sum |
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472 | |||
473 | test al, al |
||
474 | jnz .next |
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475 | |||
476 | mov eax, ebx |
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477 | pop ebx |
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478 | ret |
||
479 | .next: |
||
480 | add ebx, 16 |
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481 | cmp ebx, ACPI_HI_RSDP_WINDOW_END |
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482 | jb .check |
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483 | |||
484 | pop ebx |
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485 | xor eax, eax |
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486 | ret |
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487 | |||
488 | align 4 |
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489 | rsdt_find: ;ecx= rsdt edx= SIG |
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490 | push ebx |
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491 | push esi |
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492 | |||
493 | lea ebx, [ecx+36] |
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494 | mov esi, [ecx+4] |
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495 | add esi, ecx |
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2443 | Serge | 496 | align 4 |
2288 | clevermous | 497 | .next: |
498 | mov eax, [ebx] |
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499 | cmp [eax], edx |
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500 | je .done |
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501 | |||
502 | add ebx, 4 |
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503 | cmp ebx, esi |
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504 | jb .next |
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505 | |||
506 | xor eax, eax |
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507 | pop esi |
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508 | pop ebx |
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509 | ret |
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510 | |||
511 | .done: |
||
512 | mov eax, [ebx] |
||
513 | pop esi |
||
514 | pop ebx |
||
515 | ret |
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516 | |||
517 | align 4 |
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518 | check_acpi: |
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519 | |||
520 | call acpi_locate |
||
521 | test eax, eax |
||
522 | jz .done |
||
523 | |||
524 | mov ecx, [eax+16] |
||
5787 | serge | 525 | mov edx, ACPI_FADT_SIGN |
2288 | clevermous | 526 | mov [acpi_rsdt_base-OS_BASE], ecx |
527 | call rsdt_find |
||
3732 | Serge | 528 | mov [acpi_fadt_base-OS_BASE], eax |
2288 | clevermous | 529 | test eax, eax |
3732 | Serge | 530 | jz @f |
531 | |||
532 | mov eax, [eax+40] |
||
533 | mov [acpi_dsdt_base-OS_BASE], eax |
||
534 | mov eax, [eax+4] |
||
535 | mov [acpi_dsdt_size-OS_BASE], eax |
||
5787 | serge | 536 | @@: |
537 | mov edx, ACPI_HPET_SIGN |
||
538 | mov ecx, [acpi_rsdt_base-OS_BASE] |
||
539 | call rsdt_find |
||
540 | test eax, eax |
||
541 | jz @F |
||
3732 | Serge | 542 | |
5787 | serge | 543 | mov [acpi_hpet_base-OS_BASE], eax |
544 | mov eax, [eax+44] |
||
545 | mov [hpet_base-OS_BASE], eax |
||
3732 | Serge | 546 | @@: |
547 | mov edx, ACPI_MADT_SIGN |
||
548 | mov ecx, [acpi_rsdt_base-OS_BASE] |
||
549 | call rsdt_find |
||
550 | test eax, eax |
||
2288 | clevermous | 551 | jz .done |
552 | |||
553 | mov [acpi_madt_base-OS_BASE], eax |
||
554 | mov ecx, [eax+36] |
||
555 | mov [acpi_lapic_base-OS_BASE], ecx |
||
556 | |||
2443 | Serge | 557 | mov edi, smpt-OS_BASE |
558 | mov ebx, [ecx+0x20] |
||
559 | shr ebx, 24 ; read APIC ID |
||
560 | |||
561 | mov [edi], ebx ; bootstrap always first |
||
562 | inc [cpu_count-OS_BASE] |
||
563 | add edi, 4 |
||
564 | |||
2288 | clevermous | 565 | lea edx, [eax+44] |
566 | mov ecx, [eax+4] |
||
567 | add ecx, eax |
||
568 | .check: |
||
569 | mov eax, [edx] |
||
2443 | Serge | 570 | cmp al, 0 |
571 | jne .io_apic |
||
2288 | clevermous | 572 | |
2443 | Serge | 573 | shr eax, 24 ; get APIC ID |
574 | cmp eax, ebx ; skip self |
||
575 | je .next |
||
576 | |||
577 | test [edx+4], byte 1 ; is enabled ? |
||
578 | jz .next |
||
579 | |||
580 | cmp [cpu_count-OS_BASE], 16 |
||
581 | jae .next |
||
582 | |||
583 | stosd ; store APIC ID |
||
584 | inc [cpu_count-OS_BASE] |
||
2288 | clevermous | 585 | .next: |
2443 | Serge | 586 | mov eax, [edx] |
2288 | clevermous | 587 | movzx eax, ah |
588 | add edx, eax |
||
589 | cmp edx, ecx |
||
590 | jb .check |
||
591 | .done: |
||
592 | ret |
||
2443 | Serge | 593 | |
594 | .io_apic: |
||
595 | cmp al, 1 |
||
596 | jne .next |
||
597 | |||
2288 | clevermous | 598 | mov eax, [edx+4] |
599 | mov [acpi_ioapic_base-OS_BASE], eax |
||
2443 | Serge | 600 | jmp .next |
5787 | serge | 601 | |
602 | HPET_PERIOD equ 0x0004 |
||
603 | HPET_CFG_ENABLE equ 0x0001 |
||
604 | HPET_CFG equ 0x0010 |
||
605 | HPET_COUNTER equ 0x00f0 |
||
606 | HPET_T0_CFG equ 0x0100 |
||
607 | |||
608 | HPET_TN_LEVEL equ 0x0002 |
||
609 | HPET_TN_ENABLE equ 0x0004 |
||
610 | HPET_TN_FSB equ 0x4000 |
||
611 | |||
612 | align 4 |
||
613 | init_hpet: |
||
614 | mov ebx, [hpet_base-OS_BASE] |
||
615 | test ebx, ebx |
||
616 | jz @F |
||
617 | |||
618 | mov eax, [ebx] |
||
619 | and ah, 0x1F |
||
620 | inc ah |
||
621 | movzx eax, ah |
||
622 | mov [hpet_timers-OS_BASE], eax |
||
623 | mov ecx, eax |
||
624 | |||
625 | mov eax, [ebx+HPET_PERIOD] |
||
5791 | serge | 626 | xor edx, edx |
627 | shld edx, eax, 10 |
||
628 | shl eax, 10 |
||
629 | mov esi, 1000000 |
||
630 | div esi |
||
631 | mov [hpet_period-OS_BASE], eax |
||
5787 | serge | 632 | |
633 | mov esi, [ebx+HPET_CFG] |
||
634 | and esi, not HPET_CFG_ENABLE |
||
635 | mov [ebx+HPET_CFG], esi ;stop main counter |
||
636 | |||
637 | lea edx, [ebx+HPET_T0_CFG] |
||
638 | @@: |
||
639 | jcxz @F |
||
640 | mov eax, [edx] |
||
641 | and eax, not (HPET_TN_ENABLE+HPET_TN_LEVEL+HPET_TN_FSB) |
||
642 | mov [edx], eax |
||
643 | add edx, 0x20 |
||
644 | dec ecx |
||
645 | jmp @B |
||
646 | @@: |
||
647 | mov [ebx+HPET_COUNTER], ecx ;reset main counter |
||
648 | mov [ebx+HPET_COUNTER+4], ecx |
||
649 | |||
650 | or esi, HPET_CFG_ENABLE |
||
651 | mov [ebx+HPET_CFG], esi ;and start again |
||
652 | @@: |
||
653 | ret |
||
654 |