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1 | # |
1 | # |
2 | # Copyright (C) 2001-2004 Jakub Jermar |
2 | # Copyright (C) 2001-2004 Jakub Jermar |
3 | # All rights reserved. |
3 | # All rights reserved. |
4 | # |
4 | # |
5 | # Redistribution and use in source and binary forms, with or without |
5 | # Redistribution and use in source and binary forms, with or without |
6 | # modification, are permitted provided that the following conditions |
6 | # modification, are permitted provided that the following conditions |
7 | # are met: |
7 | # are met: |
8 | # |
8 | # |
9 | # - Redistributions of source code must retain the above copyright |
9 | # - Redistributions of source code must retain the above copyright |
10 | # notice, this list of conditions and the following disclaimer. |
10 | # notice, this list of conditions and the following disclaimer. |
11 | # - Redistributions in binary form must reproduce the above copyright |
11 | # - Redistributions in binary form must reproduce the above copyright |
12 | # notice, this list of conditions and the following disclaimer in the |
12 | # notice, this list of conditions and the following disclaimer in the |
13 | # documentation and/or other materials provided with the distribution. |
13 | # documentation and/or other materials provided with the distribution. |
14 | # - The name of the author may not be used to endorse or promote products |
14 | # - The name of the author may not be used to endorse or promote products |
15 | # derived from this software without specific prior written permission. |
15 | # derived from this software without specific prior written permission. |
16 | # |
16 | # |
17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | # |
27 | # |
28 | 28 | ||
29 | ## very low and hardware-level functions |
29 | ## very low and hardware-level functions |
30 | 30 | ||
31 | #define ERROR_WORD_INTERRUPT_LIST 0x00027D00 |
31 | #define ERROR_WORD_INTERRUPT_LIST 0x00027D00 |
32 | 32 | ||
33 | .text |
33 | .text |
34 | 34 | ||
35 | .global cpu_halt |
35 | .global cpu_halt |
36 | .global cpu_sleep |
36 | .global cpu_sleep |
37 | .global paging_on |
37 | .global paging_on |
38 | .global enable_l_apic_in_msr |
38 | .global enable_l_apic_in_msr |
39 | .global interrupt_handlers |
39 | .global interrupt_handlers |
40 | .global inb |
40 | .global inb |
41 | .global inw |
41 | .global inw |
42 | .global inl |
42 | .global inl |
43 | .global outb |
43 | .global outb |
44 | .global outw |
44 | .global outw |
45 | .global outl |
45 | .global outl |
46 | .global memcopy |
46 | .global memcopy |
47 | .global memsetb |
47 | .global memsetb |
48 | .global memsetw |
48 | .global memsetw |
49 | .global memcmp |
49 | .global memcmp |
50 | 50 | ||
51 | 51 | ||
52 | ## Turn paging on |
52 | ## Turn paging on |
53 | # |
53 | # |
54 | # Enable paging and write-back caching in CR0. |
54 | # Enable paging and write-back caching in CR0. |
55 | # |
55 | # |
56 | paging_on: |
56 | paging_on: |
57 | pushl %eax |
57 | pushl %eax |
58 | movl %cr0,%eax |
58 | movl %cr0,%eax |
59 | orl $(1<<31),%eax # paging on |
59 | orl $(1<<31),%eax # paging on |
60 | andl $~((1<<30)|(1<<29)),%eax # clear Cache Disable and not Write Though |
60 | andl $~((1<<30)|(1<<29)),%eax # clear Cache Disable and not Write Though |
61 | movl %eax,%cr0 |
61 | movl %eax,%cr0 |
62 | jmp 0f |
62 | jmp 0f |
63 | 0: |
63 | 0: |
64 | popl %eax |
64 | popl %eax |
65 | ret |
65 | ret |
66 | 66 | ||
67 | 67 | ||
68 | ## Enable local APIC |
68 | ## Enable local APIC |
69 | # |
69 | # |
70 | # Enable local APIC in MSR. |
70 | # Enable local APIC in MSR. |
71 | # |
71 | # |
72 | enable_l_apic_in_msr: |
72 | enable_l_apic_in_msr: |
73 | pusha |
73 | pusha |
74 | 74 | ||
75 | movl $0x1b, %ecx |
75 | movl $0x1b, %ecx |
76 | rdmsr |
76 | rdmsr |
77 | orl $(1<<11),%eax |
77 | orl $(1<<11),%eax |
78 | orl $(0xfee00000),%eax |
78 | orl $(0xfee00000),%eax |
79 | wrmsr |
79 | wrmsr |
80 | 80 | ||
81 | popa |
81 | popa |
82 | ret |
82 | ret |
83 | 83 | ||
84 | 84 | ||
85 | ## Declare interrupt handlers |
85 | ## Declare interrupt handlers |
86 | # |
86 | # |
87 | # Declare interrupt handlers for n interrupt |
87 | # Declare interrupt handlers for n interrupt |
88 | # vectors starting at vector i. |
88 | # vectors starting at vector i. |
89 | # |
89 | # |
90 | # The handlers setup data segment registers |
90 | # The handlers setup data segment registers |
91 | # and call trap_dispatcher(). |
91 | # and call trap_dispatcher(). |
92 | # |
92 | # |
93 | .macro handler i n |
93 | .macro handler i n |
94 | push %ebp |
94 | push %ebp |
95 | movl %esp,%ebp |
95 | movl %esp,%ebp |
96 | pusha |
96 | pusha |
97 | 97 | ||
98 | push %ds |
98 | push %ds |
99 | push %es |
99 | push %es |
100 | 100 | ||
101 | # we must fill the data segment registers |
101 | # we must fill the data segment registers |
102 | movw $16,%ax |
102 | movw $16,%ax |
103 | movw %ax,%ds |
103 | movw %ax,%ds |
104 | movw %ax,%es |
104 | movw %ax,%es |
105 | 105 | ||
106 | movl $(\i),%edi |
106 | movl $(\i),%edi |
107 | pushl %ebp |
107 | pushl %ebp |
108 | addl $4,(%esp) |
108 | addl $4,(%esp) |
109 | pushl %edi |
109 | pushl %edi |
110 | call trap_dispatcher |
110 | call trap_dispatcher |
111 | addl $8,%esp |
111 | addl $8,%esp |
112 | 112 | ||
113 | pop %es |
113 | pop %es |
114 | pop %ds |
114 | pop %ds |
115 | 115 | ||
116 | mov $\i,%cl; |
116 | mov $\i,%cl; |
117 | movl $1,%eax; |
117 | movl $1,%eax; |
118 | test $0xe0,%cl; |
118 | test $0xe0,%cl; |
119 | jnz 0f; |
119 | jnz 0f; |
- | 120 | and $0x1f,%cl; |
|
120 | shl %cl,%eax; |
121 | shl %cl,%eax; |
121 | and $ERROR_WORD_INTERRUPT_LIST,%eax; |
122 | and $ERROR_WORD_INTERRUPT_LIST,%eax; |
122 | jnz 0f; |
123 | jz 0f; |
123 | 124 | ||
124 | popa; |
125 | popa; |
125 | pop %ebp; |
126 | pop %ebp; |
126 | add $4,%esp; |
127 | add $4,%esp; |
127 | iret; |
128 | iret; |
128 | 129 | ||
129 | 0: |
130 | 0: |
130 | 131 | ||
131 | popa |
132 | popa |
132 | pop %ebp |
133 | pop %ebp |
133 | iret |
134 | iret |
134 | 135 | ||
135 | .if (\n-\i)-1 |
136 | .if (\n-\i)-1 |
136 | handler "(\i+1)",\n |
137 | handler "(\i+1)",\n |
137 | .endif |
138 | .endif |
138 | .endm |
139 | .endm |
139 | 140 | ||
140 | # keep in sync with pm.h !!! |
141 | # keep in sync with pm.h !!! |
141 | IDT_ITEMS=64 |
142 | IDT_ITEMS=64 |
142 | interrupt_handlers: |
143 | interrupt_handlers: |
143 | h_start: |
144 | h_start: |
144 | handler 0 64 |
145 | handler 0 64 |
145 | # handler 64 128 |
146 | # handler 64 128 |
146 | # handler 128 192 |
147 | # handler 128 192 |
147 | # handler 192 256 |
148 | # handler 192 256 |
148 | h_end: |
149 | h_end: |
149 | 150 | ||
150 | 151 | ||
151 | ## I/O input (byte) |
152 | ## I/O input (byte) |
152 | # |
153 | # |
153 | # Get a byte from I/O port and store it AL. |
154 | # Get a byte from I/O port and store it AL. |
154 | # |
155 | # |
155 | inb: |
156 | inb: |
156 | push %edx |
157 | push %edx |
157 | xorl %eax,%eax |
158 | xorl %eax,%eax |
158 | movl 8(%esp),%edx |
159 | movl 8(%esp),%edx |
159 | inb %dx,%al |
160 | inb %dx,%al |
160 | pop %edx |
161 | pop %edx |
161 | ret |
162 | ret |
162 | 163 | ||
163 | 164 | ||
164 | ## I/O input (word) |
165 | ## I/O input (word) |
165 | # |
166 | # |
166 | # Get a word from I/O port and store it AX. |
167 | # Get a word from I/O port and store it AX. |
167 | # |
168 | # |
168 | inw: |
169 | inw: |
169 | push %edx |
170 | push %edx |
170 | xorl %eax,%eax |
171 | xorl %eax,%eax |
171 | movl 8(%esp),%edx |
172 | movl 8(%esp),%edx |
172 | inw %dx,%ax |
173 | inw %dx,%ax |
173 | pop %edx |
174 | pop %edx |
174 | ret |
175 | ret |
175 | 176 | ||
176 | 177 | ||
177 | ## I/O input (dword) |
178 | ## I/O input (dword) |
178 | # |
179 | # |
179 | # Get a dword from I/O port and store it EAX. |
180 | # Get a dword from I/O port and store it EAX. |
180 | # |
181 | # |
181 | inl: |
182 | inl: |
182 | push %edx |
183 | push %edx |
183 | xorl %eax,%eax |
184 | xorl %eax,%eax |
184 | movl 8(%esp),%edx |
185 | movl 8(%esp),%edx |
185 | inl %dx,%eax |
186 | inl %dx,%eax |
186 | pop %edx |
187 | pop %edx |
187 | ret |
188 | ret |
188 | 189 | ||
189 | 190 | ||
190 | ## I/O output (byte) |
191 | ## I/O output (byte) |
191 | # |
192 | # |
192 | # Send a byte to I/O port. |
193 | # Send a byte to I/O port. |
193 | # |
194 | # |
194 | outb: |
195 | outb: |
195 | push %ebp |
196 | push %ebp |
196 | movl %esp,%ebp |
197 | movl %esp,%ebp |
197 | pusha |
198 | pusha |
198 | 199 | ||
199 | movl 8(%ebp),%edx |
200 | movl 8(%ebp),%edx |
200 | movl 12(%ebp),%eax |
201 | movl 12(%ebp),%eax |
201 | outb %al,%dx |
202 | outb %al,%dx |
202 | 203 | ||
203 | popa |
204 | popa |
204 | pop %ebp |
205 | pop %ebp |
205 | ret |
206 | ret |
206 | 207 | ||
207 | 208 | ||
208 | ## I/O output (word) |
209 | ## I/O output (word) |
209 | # |
210 | # |
210 | # Send a word to I/O port. |
211 | # Send a word to I/O port. |
211 | # |
212 | # |
212 | outw: |
213 | outw: |
213 | push %ebp |
214 | push %ebp |
214 | movl %esp,%ebp |
215 | movl %esp,%ebp |
215 | pusha |
216 | pusha |
216 | 217 | ||
217 | movl 8(%ebp),%edx |
218 | movl 8(%ebp),%edx |
218 | movl 12(%ebp),%eax |
219 | movl 12(%ebp),%eax |
219 | outw %ax,%dx |
220 | outw %ax,%dx |
220 | 221 | ||
221 | popa |
222 | popa |
222 | pop %ebp |
223 | pop %ebp |
223 | ret |
224 | ret |
224 | 225 | ||
225 | 226 | ||
226 | ## I/O output (dword) |
227 | ## I/O output (dword) |
227 | # |
228 | # |
228 | # Send a dword to I/O port. |
229 | # Send a dword to I/O port. |
229 | # |
230 | # |
230 | outl: |
231 | outl: |
231 | push %ebp |
232 | push %ebp |
232 | movl %esp,%ebp |
233 | movl %esp,%ebp |
233 | pusha |
234 | pusha |
234 | 235 | ||
235 | movl 8(%ebp),%edx |
236 | movl 8(%ebp),%edx |
236 | movl 12(%ebp),%eax |
237 | movl 12(%ebp),%eax |
237 | outl %eax,%dx |
238 | outl %eax,%dx |
238 | 239 | ||
239 | popa |
240 | popa |
240 | pop %ebp |
241 | pop %ebp |
241 | ret |
242 | ret |
242 | 243 | ||
243 | 244 | ||
244 | ## Copy memory |
245 | ## Copy memory |
245 | # |
246 | # |
246 | # Copy a given number of bytes (3rd argument) |
247 | # Copy a given number of bytes (3rd argument) |
247 | # from the memory location defined by 1st argument |
248 | # from the memory location defined by 1st argument |
248 | # to the memory location defined by 2nd argument. |
249 | # to the memory location defined by 2nd argument. |
249 | # The memory areas cannot overlap. |
250 | # The memory areas cannot overlap. |
250 | # |
251 | # |
251 | SRC=8 |
252 | SRC=8 |
252 | DST=12 |
253 | DST=12 |
253 | CNT=16 |
254 | CNT=16 |
254 | memcopy: |
255 | memcopy: |
255 | push %ebp |
256 | push %ebp |
256 | movl %esp,%ebp |
257 | movl %esp,%ebp |
257 | pusha |
258 | pusha |
258 | 259 | ||
259 | cld |
260 | cld |
260 | movl CNT(%ebp),%ecx |
261 | movl CNT(%ebp),%ecx |
261 | movl DST(%ebp),%edi |
262 | movl DST(%ebp),%edi |
262 | movl SRC(%ebp),%esi |
263 | movl SRC(%ebp),%esi |
263 | 264 | ||
264 | rep movsb %ds:(%esi),%es:(%edi) |
265 | rep movsb %ds:(%esi),%es:(%edi) |
265 | 266 | ||
266 | popa |
267 | popa |
267 | pop %ebp |
268 | pop %ebp |
268 | ret |
269 | ret |
269 | 270 | ||
270 | 271 | ||
271 | ## Fill memory with bytes |
272 | ## Fill memory with bytes |
272 | # |
273 | # |
273 | # Fill a given number of bytes (2nd argument) |
274 | # Fill a given number of bytes (2nd argument) |
274 | # at memory defined by 1st argument with the |
275 | # at memory defined by 1st argument with the |
275 | # byte value defined by 3rd argument. |
276 | # byte value defined by 3rd argument. |
276 | # |
277 | # |
277 | DST=8 |
278 | DST=8 |
278 | CNT=12 |
279 | CNT=12 |
279 | X=16 |
280 | X=16 |
280 | memsetb: |
281 | memsetb: |
281 | push %ebp |
282 | push %ebp |
282 | movl %esp,%ebp |
283 | movl %esp,%ebp |
283 | pusha |
284 | pusha |
284 | 285 | ||
285 | cld |
286 | cld |
286 | movl CNT(%ebp),%ecx |
287 | movl CNT(%ebp),%ecx |
287 | movl DST(%ebp),%edi |
288 | movl DST(%ebp),%edi |
288 | movl X(%ebp),%eax |
289 | movl X(%ebp),%eax |
289 | 290 | ||
290 | rep stosb %al,%es:(%edi) |
291 | rep stosb %al,%es:(%edi) |
291 | 292 | ||
292 | popa |
293 | popa |
293 | pop %ebp |
294 | pop %ebp |
294 | ret |
295 | ret |
295 | 296 | ||
296 | 297 | ||
297 | ## Fill memory with words |
298 | ## Fill memory with words |
298 | # |
299 | # |
299 | # Fill a given number of words (2nd argument) |
300 | # Fill a given number of words (2nd argument) |
300 | # at memory defined by 1st argument with the |
301 | # at memory defined by 1st argument with the |
301 | # word value defined by 3rd argument. |
302 | # word value defined by 3rd argument. |
302 | # |
303 | # |
303 | DST=8 |
304 | DST=8 |
304 | CNT=12 |
305 | CNT=12 |
305 | X=16 |
306 | X=16 |
306 | memsetw: |
307 | memsetw: |
307 | push %ebp |
308 | push %ebp |
308 | movl %esp,%ebp |
309 | movl %esp,%ebp |
309 | pusha |
310 | pusha |
310 | 311 | ||
311 | cld |
312 | cld |
312 | movl CNT(%ebp),%ecx |
313 | movl CNT(%ebp),%ecx |
313 | movl DST(%ebp),%edi |
314 | movl DST(%ebp),%edi |
314 | movl X(%ebp),%eax |
315 | movl X(%ebp),%eax |
315 | 316 | ||
316 | rep stosw %ax,%es:(%edi) |
317 | rep stosw %ax,%es:(%edi) |
317 | 318 | ||
318 | popa |
319 | popa |
319 | pop %ebp |
320 | pop %ebp |
320 | ret |
321 | ret |
321 | 322 | ||
322 | 323 | ||
323 | ## Compare memory regions for equality |
324 | ## Compare memory regions for equality |
324 | # |
325 | # |
325 | # Compare a given number of bytes (3rd argument) |
326 | # Compare a given number of bytes (3rd argument) |
326 | # at memory locations defined by 1st and 2nd argument |
327 | # at memory locations defined by 1st and 2nd argument |
327 | # for equality. If the bytes are equal, EAX contains |
328 | # for equality. If the bytes are equal, EAX contains |
328 | # 0. |
329 | # 0. |
329 | # |
330 | # |
330 | SRC=12 |
331 | SRC=12 |
331 | DST=16 |
332 | DST=16 |
332 | CNT=20 |
333 | CNT=20 |
333 | memcmp: |
334 | memcmp: |
334 | push %ebp |
335 | push %ebp |
335 | subl $4,%esp |
336 | subl $4,%esp |
336 | movl %esp,%ebp |
337 | movl %esp,%ebp |
337 | 338 | ||
338 | pusha |
339 | pusha |
339 | 340 | ||
340 | cld |
341 | cld |
341 | movl CNT(%ebp),%ecx |
342 | movl CNT(%ebp),%ecx |
342 | movl DST(%ebp),%edi |
343 | movl DST(%ebp),%edi |
343 | movl SRC(%ebp),%esi |
344 | movl SRC(%ebp),%esi |
344 | 345 | ||
345 | repe cmpsb %es:(%edi),%ds:(%esi) |
346 | repe cmpsb %es:(%edi),%ds:(%esi) |
346 | movl %ecx,(%ebp) |
347 | movl %ecx,(%ebp) |
347 | 348 | ||
348 | popa |
349 | popa |
349 | 350 | ||
350 | movl (%ebp),%eax # return value => %eax (zero on success) |
351 | movl (%ebp),%eax # return value => %eax (zero on success) |
351 | addl $4,%esp |
352 | addl $4,%esp |
352 | pop %ebp |
353 | pop %ebp |
353 | 354 | ||
354 | ret |
355 | ret |
355 | 356 | ||
356 | 357 | ||
357 | # THIS IS USERSPACE CODE |
358 | # THIS IS USERSPACE CODE |
358 | .global utext |
359 | .global utext |
359 | utext: |
360 | utext: |
- | 361 | xor %ax,%ax; |
|
- | 362 | mov %ax,%ds; |
|
- | 363 | mov %ax,%es; |
|
- | 364 | mov %ax,%fs; |
|
- | 365 | mov %ax,%gs; |
|
360 | 0: |
366 | 0: |
361 | # movl $0xdeadbeaf, %eax |
367 | # movl $0xdeadbeaf, %eax |
362 | int $48 |
368 | int $48 |
- | 369 | cli; |
|
- | 370 | sti; |
|
363 | jmp 0b |
371 | jmp 0b |
364 | # not reached |
372 | # not reached |
365 | utext_end: |
373 | utext_end: |
366 | 374 | ||
367 | .data |
375 | .data |
368 | .global utext_size |
376 | .global utext_size |
369 | utext_size: |
377 | utext_size: |
370 | .long utext_end - utext |
378 | .long utext_end - utext |
371 | 379 | ||
372 | 380 | ||
373 | #.section K_DATA_START |
381 | #.section K_DATA_START |
374 | .global interrupt_handler_size |
382 | .global interrupt_handler_size |
375 | 383 | ||
376 | interrupt_handler_size: .long (h_end-h_start)/IDT_ITEMS |
384 | interrupt_handler_size: .long (h_end-h_start)/IDT_ITEMS |
377 | 385 |