Rev 1683 | Rev 1952 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
750 | victor | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
||
983 | diamond | 3 | ;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;; |
750 | victor | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
||
6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
||
593 | mikedld | 7 | |
465 | serge | 8 | $Revision: 1941 $ |
9 | |||
593 | mikedld | 10 | |
1683 | art_zh | 11 | MEM_WB equ 6 ;write-back memory |
12 | MEM_WC equ 1 ;write combined memory |
||
13 | MEM_UC equ 0 ;uncached memory |
||
465 | serge | 14 | |
1683 | art_zh | 15 | ; ====================================================================== |
16 | align 4 |
||
17 | preinit_mem: |
||
465 | serge | 18 | |
1683 | art_zh | 19 | ; clear [0x280000..HEAP_BASE] |
20 | xor eax,eax |
||
1941 | art_zh | 21 | mov edi, CLEAN_ZONE ; 0x280000 = ramdisk FAT ? |
22 | mov ecx,(HEAP_BASE-OS_BASE-CLEAN_ZONE) / 4 |
||
1683 | art_zh | 23 | cld |
24 | rep stosd |
||
25 | |||
26 | ; clear [0x40000..0x90000] |
||
27 | mov edi,0x50000 ; 0x50000 is somewhere inside kernel code? |
||
28 | mov ecx,(0x90000-0x50000)/4 |
||
29 | rep stosd |
||
30 | |||
31 | ; clear undefined kernel globals |
||
32 | mov edi, endofcode-OS_BASE |
||
33 | mov ecx, (uglobals_size/4)+4 |
||
34 | rep stosd |
||
35 | |||
36 | ; save [0..0xffff] |
||
37 | xor esi, esi |
||
1941 | art_zh | 38 | mov edi,(BOOT_VAR-OS_BASE) ; low mem storage area |
1683 | art_zh | 39 | mov ecx, 0x10000 / 4 |
40 | rep movsd |
||
41 | ; clear [0x1000..0x0ffff] |
||
42 | mov edi,0x1000 |
||
43 | mov ecx,0xf000 / 4 |
||
44 | rep stosd |
||
45 | |||
46 | ; clear |
||
47 | mov edi, sys_pgdir-OS_BASE |
||
48 | mov ecx, 4096/4 |
||
49 | rep stosd |
||
50 | ret |
||
51 | |||
52 | ; ====================================================================== |
||
465 | serge | 53 | align 4 |
54 | proc init_mem |
||
55 | |||
1683 | art_zh | 56 | mov esi, (PCIe_CONFIG_SPACE-OS_BASE) ; esi will hold total amount of memory |
57 | mov edx, esi ; edx will hold maximum allocatable address |
||
465 | serge | 58 | |
1683 | art_zh | 59 | mov [MEM_AMOUNT-OS_BASE], esi |
60 | mov [pg_data.mem_amount-OS_BASE], esi |
||
61 | shr esi, 12 |
||
62 | mov [pg_data.pages_count-OS_BASE], esi ; max number of PTEs ? |
||
513 | serge | 63 | |
1683 | art_zh | 64 | shr edx, 12 |
65 | add edx, 31 |
||
66 | and edx, not 31 |
||
67 | shr edx, 3 |
||
68 | mov [pg_data.pagemap_size-OS_BASE], edx ; size of sys_pgmap structure |
||
465 | serge | 69 | |
1683 | art_zh | 70 | add edx, (sys_pgmap-OS_BASE)+4095 |
71 | and edx, not 4095 |
||
72 | mov [tmp_page_tabs], edx ; free zone to build PTEs |
||
465 | serge | 73 | |
1683 | art_zh | 74 | mov edx, (HEAP_BASE-OS_BASE+HEAP_MIN_SIZE)/4096 |
75 | mov [pg_data.kernel_pages -OS_BASE], edx |
||
76 | shr edx, 10 |
||
77 | mov [pg_data.kernel_tables-OS_BASE], edx |
||
465 | serge | 78 | |
1683 | art_zh | 79 | mov edx, (sys_pgdir-OS_BASE)+ 0x800 ; (0x800 = OS_BASE shr 20) |
465 | serge | 80 | |
1683 | art_zh | 81 | mov ebx, cr4 |
82 | or ebx, CR4_PSE |
||
83 | mov eax, PG_LARGE+PG_SW |
||
84 | mov cr4, ebx |
||
85 | dec [pg_data.kernel_tables-OS_BASE] |
||
1941 | art_zh | 86 | sub [pg_data.kernel_pages -OS_BASE], 1024 ; 1 large page = 1024 ordinary pages |
465 | serge | 87 | |
1683 | art_zh | 88 | mov [edx], eax ; map first (physical) 4M bytes |
89 | add edx, 4 |
||
465 | serge | 90 | |
1683 | art_zh | 91 | mov edi, [tmp_page_tabs] |
1941 | art_zh | 92 | mov ecx, [pg_data.kernel_pages -OS_BASE] ; map the rest of kernel space |
93 | mov eax, 0x00400000+PG_SW |
||
94 | .map_kernel_pages: |
||
95 | stosd |
||
96 | add eax, 4096 |
||
97 | dec ecx |
||
98 | jnz .map_kernel_pages |
||
1683 | art_zh | 99 | |
100 | mov ecx, [pg_data.kernel_tables-OS_BASE] ; build some PDEs to hold empty PTEs |
||
101 | mov eax, [tmp_page_tabs] |
||
102 | or eax, PG_SW |
||
103 | mov edi, edx ; edi = sys_pgdir+0x804 |
||
465 | serge | 104 | .map_kernel_tabs: |
1683 | art_zh | 105 | stosd |
106 | add eax, 0x1000 |
||
107 | dec ecx |
||
108 | jnz .map_kernel_tabs |
||
465 | serge | 109 | |
1683 | art_zh | 110 | ; map pagetables to linear space |
111 | mov dword [sys_pgdir-OS_BASE+(page_tabs shr 20)], sys_pgdir+PG_SW-OS_BASE |
||
465 | serge | 112 | |
1683 | art_zh | 113 | mov edi, (sys_pgdir-OS_BASE) |
114 | lea esi, [edi+(OS_BASE shr 20)] |
||
115 | movsd |
||
116 | movsd |
||
117 | ret |
||
465 | serge | 118 | endp |
119 | |||
120 | align 4 |
||
121 | proc init_page_map |
||
1103 | diamond | 122 | ; mark all memory as unavailable |
1683 | art_zh | 123 | mov edi, sys_pgmap-OS_BASE |
124 | mov ecx, [pg_data.pagemap_size-OS_BASE] |
||
125 | shr ecx, 2 |
||
126 | xor eax, eax |
||
127 | cld |
||
128 | rep stosd |
||
465 | serge | 129 | |
1103 | diamond | 130 | ; scan through memory map and mark free areas as available |
1683 | art_zh | 131 | mov ebx, BOOT_VAR-OS_BASE + 0x9104 |
132 | mov edx, [ebx-4] |
||
1103 | diamond | 133 | .scanmap: |
1683 | art_zh | 134 | mov ecx, [ebx+8] |
135 | shr ecx, 12 ; ecx = number of pages |
||
136 | jz .next |
||
137 | mov edi, [ebx] |
||
138 | shr edi, 12 ; edi = first page |
||
139 | mov eax, edi |
||
140 | shr edi, 5 |
||
141 | shl edi, 2 |
||
142 | add edi, sys_pgmap-OS_BASE |
||
143 | and eax, 31 |
||
144 | jz .startok |
||
145 | add ecx, eax |
||
146 | sub ecx, 32 |
||
147 | jbe .onedword |
||
148 | push ecx |
||
149 | mov ecx, eax |
||
150 | or eax, -1 |
||
151 | shl eax, cl |
||
152 | or [edi], eax |
||
153 | add edi, 4 |
||
154 | pop ecx |
||
1103 | diamond | 155 | .startok: |
1683 | art_zh | 156 | push ecx |
157 | shr ecx, 5 |
||
158 | or eax, -1 |
||
159 | rep stosd |
||
160 | pop ecx |
||
161 | and ecx, 31 |
||
162 | neg eax |
||
163 | shl eax, cl |
||
164 | dec eax |
||
165 | or [edi], eax |
||
166 | jmp .next |
||
1103 | diamond | 167 | .onedword: |
1683 | art_zh | 168 | add ecx, 32 |
169 | sub ecx, eax |
||
1103 | diamond | 170 | @@: |
1683 | art_zh | 171 | bts [edi], eax |
172 | inc eax |
||
173 | loop @b |
||
1103 | diamond | 174 | .next: |
1683 | art_zh | 175 | add ebx, 20 |
176 | dec edx |
||
177 | jnz .scanmap |
||
1103 | diamond | 178 | |
179 | ; mark kernel memory as allocated (unavailable) |
||
1683 | art_zh | 180 | mov ecx, [tmp_page_tabs] |
181 | mov edx, [pg_data.pages_count-OS_BASE] |
||
182 | shr ecx, 12 |
||
183 | add ecx, [pg_data.kernel_tables-OS_BASE] |
||
184 | sub edx, ecx |
||
185 | mov [pg_data.pages_free-OS_BASE], edx |
||
465 | serge | 186 | |
1683 | art_zh | 187 | mov edi, sys_pgmap-OS_BASE |
188 | mov ebx, ecx |
||
189 | shr ecx, 5 |
||
190 | xor eax, eax |
||
191 | rep stosd |
||
465 | serge | 192 | |
1683 | art_zh | 193 | not eax |
194 | mov ecx, ebx |
||
195 | and ecx, 31 |
||
196 | shl eax, cl |
||
197 | and [edi], eax |
||
198 | add edi, OS_BASE |
||
199 | mov [page_start-OS_BASE], edi; |
||
465 | serge | 200 | |
1683 | art_zh | 201 | mov ebx, sys_pgmap |
202 | add ebx, [pg_data.pagemap_size-OS_BASE] |
||
203 | mov [page_end-OS_BASE], ebx |
||
465 | serge | 204 | |
1683 | art_zh | 205 | mov [pg_data.pg_mutex-OS_BASE], 0 |
206 | ret |
||
465 | serge | 207 | endp |
208 | |||
209 | align 4 |
||
586 | serge | 210 | |
211 | init_BIOS32: |
||
1683 | art_zh | 212 | mov edi, 0xE0000 |
586 | serge | 213 | .pcibios_nxt: |
1683 | art_zh | 214 | cmp dword[edi], '_32_' ; "magic" word |
215 | je .BIOS32_found |
||
586 | serge | 216 | .pcibios_nxt2: |
1683 | art_zh | 217 | add edi, 0x10 |
218 | cmp edi, 0xFFFF0 |
||
219 | je .BIOS32_not_found |
||
220 | jmp .pcibios_nxt |
||
586 | serge | 221 | .BIOS32_found: ; magic word found, check control summ |
222 | |||
1683 | art_zh | 223 | movzx ecx, byte[edi + 9] |
224 | shl ecx, 4 |
||
225 | mov esi, edi |
||
226 | xor eax, eax |
||
227 | cld ; paranoia |
||
586 | serge | 228 | @@: lodsb |
1683 | art_zh | 229 | add ah, al |
230 | loop @b |
||
231 | jnz .pcibios_nxt2 ; control summ must be zero |
||
586 | serge | 232 | ; BIOS32 service found ! |
1683 | art_zh | 233 | mov ebp, [edi + 4] |
234 | mov [bios32_entry], ebp |
||
586 | serge | 235 | ; check PCI BIOS present |
1683 | art_zh | 236 | mov eax, '$PCI' |
237 | xor ebx, ebx |
||
238 | push cs ; special for 'ret far' from BIOS |
||
239 | call ebp |
||
240 | test al, al |
||
241 | jnz .PCI_BIOS32_not_found |
||
586 | serge | 242 | |
243 | ; здесь создаются дискрипторы для PCI BIOS |
||
244 | |||
1683 | art_zh | 245 | add ebx, OS_BASE |
246 | dec ecx |
||
247 | mov [(pci_code_32-OS_BASE)], cx ;limit 0-15 |
||
248 | mov [(pci_data_32-OS_BASE)], cx ;limit 0-15 |
||
586 | serge | 249 | |
1683 | art_zh | 250 | mov [(pci_code_32-OS_BASE)+2], bx ;base 0-15 |
251 | mov [(pci_data_32-OS_BASE)+2], bx ;base 0-15 |
||
586 | serge | 252 | |
1683 | art_zh | 253 | shr ebx, 16 |
254 | mov [(pci_code_32-OS_BASE)+4], bl ;base 16-23 |
||
255 | mov [(pci_data_32-OS_BASE)+4], bl ;base 16-23 |
||
586 | serge | 256 | |
1683 | art_zh | 257 | shr ecx, 16 |
258 | and cl, 0x0F |
||
259 | mov ch, bh |
||
260 | add cx, D32 |
||
261 | mov [(pci_code_32-OS_BASE)+6], cx ;lim 16-19 & |
||
262 | mov [(pci_data_32-OS_BASE)+6], cx ;base 24-31 |
||
586 | serge | 263 | |
1683 | art_zh | 264 | mov [(pci_bios_entry-OS_BASE)], edx |
265 | ; jmp .end |
||
586 | serge | 266 | .PCI_BIOS32_not_found: |
267 | ; здесь должна заполнятся pci_emu_dat |
||
268 | .BIOS32_not_found: |
||
269 | .end: |
||
1683 | art_zh | 270 | ret |
586 | serge | 271 | |
272 | align 4 |
||
1683 | art_zh | 273 | test_cpu: ; only AMD machines supported |
465 | serge | 274 | |
1683 | art_zh | 275 | xor eax, eax |
276 | mov [cpu_caps-OS_BASE], eax |
||
277 | mov [cpu_caps+4-OS_BASE], eax |
||
465 | serge | 278 | |
1683 | art_zh | 279 | pushfd |
280 | pop eax |
||
281 | mov ecx, eax |
||
282 | xor eax, 0x40000 |
||
283 | push eax |
||
284 | popfd |
||
285 | pushfd |
||
286 | pop eax |
||
287 | xor eax, ecx |
||
288 | jz $ ; 386 |
||
289 | push ecx |
||
290 | popfd |
||
465 | serge | 291 | |
1683 | art_zh | 292 | mov eax, ecx |
293 | xor eax, 0x200000 |
||
294 | push eax |
||
295 | popfd |
||
296 | pushfd |
||
297 | pop eax |
||
298 | xor eax, ecx |
||
299 | je $ ; 486 |
||
465 | serge | 300 | |
1683 | art_zh | 301 | xor eax, eax |
302 | cpuid |
||
465 | serge | 303 | |
1683 | art_zh | 304 | mov [cpu_vendor-OS_BASE], ebx |
305 | mov [cpu_vendor+4-OS_BASE], edx |
||
306 | mov [cpu_vendor+8-OS_BASE], ecx |
||
465 | serge | 307 | |
1683 | art_zh | 308 | cmp ebx, dword [AMD_str-OS_BASE] |
309 | jne $ |
||
310 | cmp edx, dword [AMD_str+4-OS_BASE] |
||
311 | jne $ |
||
312 | cmp ecx, dword [AMD_str+8-OS_BASE] |
||
313 | jne $ |
||
314 | cmp eax, 1 |
||
315 | jl $ |
||
316 | mov eax, 1 |
||
317 | cpuid |
||
318 | mov [cpu_sign-OS_BASE], eax |
||
319 | mov [cpu_info-OS_BASE], ebx |
||
320 | mov [cpu_caps-OS_BASE], edx |
||
321 | mov [cpu_caps+4-OS_BASE],ecx |
||
322 | shr eax, 8 |
||
323 | and eax, 0x0f |
||
324 | ret |
||
465 | serge | 325 |