Rev 227 | Rev 237 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
164 | serge | 1 | |
212 | serge | 2 | |
164 | serge | 3 | |
4 | proc mem_test |
||
5 | |||
214 | serge | 6 | |
164 | serge | 7 | and eax, not (CR0_CD+CR0_NW) |
212 | serge | 8 | or eax, CR0_CD ;disable caching |
214 | serge | 9 | mov cr0, eax |
164 | serge | 10 | wbinvd ;invalidate cache |
214 | serge | 11 | |
164 | serge | 12 | |
214 | serge | 13 | mov ebx, 'TEST' |
164 | serge | 14 | @@: |
15 | add edi, 0x400000 |
||
16 | xchg ebx, dword [edi] |
||
17 | cmp dword [edi], 'TEST' |
||
18 | xchg ebx, dword [edi] |
||
19 | je @b |
||
20 | |||
21 | |||
212 | serge | 22 | mov cr0, eax |
164 | serge | 23 | mov eax, edi |
24 | mov [LFBSize], 0x00800000 |
||
214 | serge | 25 | ret |
164 | serge | 26 | endp |
27 | |||
28 | |||
29 | proc init_memEx |
||
30 | xor eax, eax |
||
31 | mov edi, sys_pgdir |
||
32 | mov ecx, 2048 |
||
33 | rep stosd |
||
34 | |||
35 | |||
36 | jnc .no_PSE |
||
37 | |||
38 | |||
39 | or ebx, CR4_PSE |
||
40 | mov eax, PG_LARGE+PG_SW |
||
41 | bt [cpu_caps], CAPS_PGE |
||
42 | jnc @F |
||
43 | or eax, PG_GLOBAL |
||
44 | or ebx, CR4_PGE |
||
45 | @@: |
||
46 | mov cr4, ebx |
||
168 | serge | 47 | |
48 | |||
164 | serge | 49 | add eax, 0x00400000 |
50 | mov dword [sys_pgdir+4], eax |
||
51 | add eax, 0x00400000 |
||
52 | mov dword [sys_pgdir+8], eax |
||
53 | |||
54 | |||
188 | serge | 55 | |
164 | serge | 56 | |
57 | sub ecx, 3 ;4 |
||
212 | serge | 58 | mov eax, tmp_page_tab+PG_SW |
164 | serge | 59 | mov edi, sys_pgdir+12 ;16 |
212 | serge | 60 | |
164 | serge | 61 | |
62 | .no_PSE: |
||
63 | mov eax, PG_SW |
||
64 | mov esi, tmp_page_tab |
||
65 | mov ecx, 3072/4; 4096/4 ;0x0 - 0x00FFFFFF |
||
212 | serge | 66 | .map_low: |
164 | serge | 67 | mov [esi], eax |
68 | add eax, 0x1000 |
||
69 | mov [esi+4], eax |
||
70 | add eax, 0x1000 |
||
71 | mov [esi+8], eax |
||
72 | add eax, 0x1000 |
||
73 | mov [esi+12], eax |
||
74 | add eax, 0x1000 |
||
75 | add esi, 16 |
||
76 | dec ecx |
||
77 | jnz .map_low ;ядро |
||
78 | |||
79 | |||
80 | mov eax, tmp_page_tab+PG_SW |
||
81 | mov edi, sys_pgdir |
||
82 | |||
83 | |||
84 | |||
85 | |||
86 | add eax, 0x1000 |
||
87 | add edi, 4 |
||
88 | dec ecx |
||
89 | jnz .map_kernel_tabs |
||
90 | |||
91 | |||
92 | bt [cpu_caps], CAPS_PSE |
||
93 | jc @F |
||
94 | add edi, 3072*4 ;4096*4 ;skip low kernel memory |
||
212 | serge | 95 | @@: |
164 | serge | 96 | mov ecx, [pg_data.kernel_tables] |
97 | sub ecx, 3 |
||
212 | serge | 98 | shl ecx, 10 |
164 | serge | 99 | xor eax, eax |
100 | cld |
||
101 | rep stosd |
||
102 | |||
103 | |||
188 | serge | 104 | |
105 | |||
164 | serge | 106 | endp |
107 | |||
108 | |||
109 | proc init_page_map |
||
110 | mov edi, sys_pgmap |
||
111 | mov ecx, 384/4 |
||
212 | serge | 112 | xor eax,eax |
164 | serge | 113 | cld |
114 | rep stosd |
||
115 | |||
116 | |||
117 | mov ecx, [pg_data.pagemap_size] |
||
118 | sub ecx, 384 |
||
212 | serge | 119 | shr ecx, 2 |
164 | serge | 120 | rep stosd |
121 | |||
122 | |||
212 | serge | 123 | mov edx, [pg_data.pages_count] |
164 | serge | 124 | mov ecx, [pg_data.kernel_tables] |
125 | bt [cpu_caps], CAPS_PSE |
||
126 | jnc @f |
||
127 | sub ecx, 3 |
||
212 | serge | 128 | @@: |
164 | serge | 129 | sub edx, 3072 |
212 | serge | 130 | sub edx, ecx |
164 | serge | 131 | mov [pg_data.pages_free], edx |
132 | |||
133 | |||
134 | mov ebx, ecx |
||
135 | shr ecx, 5 |
||
136 | rep stosd |
||
137 | |||
138 | |||
139 | mov ecx, ebx |
||
140 | and ecx, 31 |
||
141 | shl eax, cl |
||
142 | stosd |
||
143 | |||
144 | |||
212 | serge | 145 | mov ebx, sys_pgmap |
164 | serge | 146 | add ebx, [pg_data.pagemap_size] |
147 | mov [page_end], ebx |
||
148 | |||
149 | |||
150 | |||
151 | |||
152 | endp |
||
153 | |||
154 | |||
155 | proc alloc_page |
||
156 | |||
157 | |||
158 | cli |
||
159 | mov ebx, [page_start] |
||
160 | mov ecx, [page_end] |
||
161 | .l1: |
||
162 | bsf eax,[ebx]; |
||
163 | jnz .found |
||
164 | add ebx,4 |
||
165 | cmp ebx, ecx |
||
166 | jb .l1 |
||
167 | popfd |
||
168 | xor eax,eax |
||
169 | ret |
||
170 | .found: |
||
171 | btr [ebx], eax |
||
172 | mov [page_start],ebx |
||
173 | sub ebx, sys_pgmap |
||
174 | shl ebx, 3 |
||
175 | add eax,ebx |
||
176 | shl eax, 12 |
||
177 | dec [pg_data.pages_free] |
||
178 | popfd |
||
179 | ret |
||
180 | endp |
||
181 | |||
182 | |||
183 | proc alloc_pages stdcall, count:dword |
||
184 | pushfd |
||
185 | cli |
||
186 | mov eax, [count] |
||
187 | add eax, 7 |
||
188 | shr eax, 3 |
||
189 | mov [count], eax |
||
190 | cmp eax, [pg_data.pages_free] |
||
191 | ja .fail |
||
192 | |||
193 | |||
194 | mov ebx, [page_end] |
||
195 | .find: |
||
196 | mov edx, [count] |
||
197 | mov edi, ecx |
||
198 | .match: |
||
199 | cmp byte [ecx], 0xFF |
||
200 | jne .next |
||
201 | dec edx |
||
202 | jz .ok |
||
203 | inc ecx |
||
204 | cmp ecx,ebx |
||
205 | jb .match |
||
206 | .fail: xor eax, eax |
||
207 | popfd |
||
208 | ret |
||
209 | .next: |
||
210 | inc ecx |
||
211 | cmp ecx, ebx |
||
212 | jb .find |
||
213 | popfd |
||
214 | xor eax, eax |
||
215 | ret |
||
216 | .ok: |
||
217 | sub ecx, edi |
||
218 | inc ecx |
||
219 | mov esi, edi |
||
220 | xor eax, eax |
||
221 | rep stosb |
||
222 | sub esi, sys_pgmap |
||
223 | shl esi, 3+12 |
||
224 | mov eax, esi |
||
225 | mov ebx, [count] |
||
226 | shl ebx, 3 |
||
227 | sub [pg_data.pages_free], ebx |
||
228 | popfd |
||
229 | ret |
||
230 | endp |
||
231 | |||
232 | |||
233 | proc map_page stdcall,lin_addr:dword,phis_addr:dword,flags:dword |
||
234 | mov eax, [phis_addr] |
||
235 | and eax, not 0xFFF |
||
236 | or eax, [flags] |
||
237 | mov ebx, [lin_addr] |
||
238 | shr ebx, 12 |
||
239 | mov [pages_tab+ebx*4], eax |
||
240 | mov eax, [lin_addr] |
||
241 | invlpg [eax] |
||
242 | ret |
||
243 | endp |
||
244 | |||
245 | |||
246 | proc free_page |
||
247 | ;arg: eax page address |
||
248 |