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002 003
003 004
004 005
005 006
006 007
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010 011
011 012
012 013
013 014
014 015
015 016
016 017
017 018
018 019
019 #include <sos/errno.h> <<
020 <<
021 020
022 #include <bootstrap/multiboot.h> 021 #include <bootstrap/multiboot.h>
023 #include <hwcore/idt.h> 022 #include <hwcore/idt.h>
024 #include <hwcore/gdt.h> 023 #include <hwcore/gdt.h>
025 #include <hwcore/irq.h> 024 #include <hwcore/irq.h>
026 #include <hwcore/exception.h> 025 #include <hwcore/exception.h>
027 #include <hwcore/i8254.h> 026 #include <hwcore/i8254.h>
028 #include <sos/list.h> <<
029 #include <sos/physmem.h> <<
030 #include <hwcore/paging.h> <<
031 #include <hwcore/mm_context.h> <<
032 #include <hwcore/swintr.h> <<
033 #include <sos/kmem_vmm.h> <<
034 #include <sos/kmalloc.h> <<
035 #include <sos/time.h> <<
036 #include <sos/thread.h> <<
037 #include <sos/process.h> <<
038 #include <sos/umem_vmm.h> <<
039 #include <sos/klibc.h> 027 #include <sos/klibc.h>
040 #include <sos/assert.h> 028 #include <sos/assert.h>
041 #include <drivers/x86_videomem.h> 029 #include <drivers/x86_videomem.h>
042 #include <drivers/bochs.h> 030 #include <drivers/bochs.h>
043 #include <sos/calcload.h> !! 031
044 #include <sos/umem_vmm.h> <<
045 #include <sos/binfmt_elf32.h> <<
046 #include <drivers/zero.h> <<
047 #include <sos/fs.h> <<
048 #include <drivers/fs_virtfs.h> <<
049 #include <drivers/devices.h> <<
050 #include <drivers/mem.h> <<
051 #include <drivers/tty.h> <<
052 #include <drivers/console.h> <<
053 #include <drivers/serial.h> <<
054 032
055 033
056 034
057 void display_bits(unsigned char row, unsigned !! 035 static void display_bits(unsigned char row, unsigned char col,
058 unsigned char attribute, !! 036 unsigned char attribute,
059 sos_ui32_t integer) !! 037 sos_ui32_t integer)
060 { 038 {
061 int i; 039 int i;
062 040
063 for (i = 31 ; i >= 0 ; i--) 041 for (i = 31 ; i >= 0 ; i--)
064 { 042 {
065 043
066 int bit_i = (integer & (1 << i)); 044 int bit_i = (integer & (1 << i));
067 045
068 unsigned char ascii_code = bit_i?219:177 046 unsigned char ascii_code = bit_i?219:177;
069 sos_x86_videomem_putchar(row, col++, 047 sos_x86_videomem_putchar(row, col++,
070 attribute, 048 attribute,
071 ascii_code); 049 ascii_code);
072 } 050 }
073 } 051 }
074 052
>> 053
075 054
076 static void clk_it(int intid) 055 static void clk_it(int intid)
077 { 056 {
078 static sos_ui32_t clock_count = 0; 057 static sos_ui32_t clock_count = 0;
079 058
080 display_bits(0, 48, 059 display_bits(0, 48,
081 SOS_X86_VIDEO_FG_LTGREEN | SOS_ 060 SOS_X86_VIDEO_FG_LTGREEN | SOS_X86_VIDEO_BG_BLUE,
082 clock_count); 061 clock_count);
083 clock_count++; 062 clock_count++;
084 063
085 <<
086 sos_time_do_tick(); <<
087 <<
088 <<
089 sos_sched_do_timer_tick(); <<
090 } 064 }
091 065
092 !! 066
093 !! 067 static void divide_ex(int exid)
094 <<
095 <<
096 <<
097 <<
098 <<
099 static void pgflt_ex(int intid, struct sos_cpu <<
100 { 068 {
101 static sos_ui32_t demand_paging_count = 0; !! 069 static sos_ui32_t div_count = 0;
102 struct sos_thread * cur_thr = sos_thread_get <<
103 sos_vaddr_t faulting_vaddr = sos_cpu_contex <<
104 sos_paddr_t ppage_paddr; <<
105 <<
106 if (sos_cpu_context_is_in_user_mode(ctxt) <<
107 || (cur_thr->fixup_uaccess.return_vaddr) <<
108 { <<
109 __label__ unforce_address_space; <<
110 sos_bool_t need_to_setup_mmu; <<
111 sos_ui32_t errcode = sos_cpu_context_get <<
112 <<
113 <<
114 <<
115 need_to_setup_mmu = (cur_thr->squatted_m <<
116 != sos_process_get_ <<
117 if (need_to_setup_mmu) <<
118 sos_thread_prepare_user_space_access(N <<
119 <<
120 if (SOS_OK == <<
121 sos_umem_vmm_try_resolve_page_fault( <<
122 <<
123 <<
124 goto unforce_address_space; <<
125 <<
126 <<
127 <<
128 if (! sos_cpu_context_is_in_user_mode(ct <<
129 { <<
130 cur_thr->fixup_uaccess.faulted_uaddr <<
131 sos_cpu_context_set_EX_return_addres <<
132 <<
133 goto unforce_address_space; <<
134 } <<
135 <<
136 if (need_to_setup_mmu) <<
137 sos_thread_end_user_space_access(); <<
138 <<
139 sos_bochs_printf("Unresolved USER page F <<
140 sos_cpu_context_get_PC( <<
141 (unsigned)faulting_vadd <<
142 (unsigned)sos_cpu_conte <<
143 sos_bochs_printf("Terminating User threa <<
144 sos_thread_exit(); <<
145 <<
146 unforce_address_space: <<
147 if (need_to_setup_mmu) <<
148 sos_thread_end_user_space_access(); <<
149 return; <<
150 } <<
151 <<
152 <<
153 if (! sos_kmem_vmm_is_valid_vaddr(faulting_v <<
154 { <<
155 <<
156 <<
157 sos_display_fatal_error("Unresolved page <<
158 sos_cpu_context_ <<
159 (unsigned)faulti <<
160 (unsigned)sos_cp <<
161 SOS_ASSERT_FATAL(! "Got page fault (note <<
162 } <<
163 <<
164 <<
165 <<
166 <<
167 <<
168 <<
169 <<
170 demand_paging_count ++; <<
171 display_bits(0, 0, 070 display_bits(0, 0,
172 SOS_X86_VIDEO_FG_LTRED | SOS_X8 071 SOS_X86_VIDEO_FG_LTRED | SOS_X86_VIDEO_BG_BLUE,
173 demand_paging_count); !! 072 div_count);
174 !! 073 div_count++;
175 <<
176 ppage_paddr = sos_physmem_ref_physpage_new(F <<
177 if (! ppage_paddr) <<
178 SOS_ASSERT_FATAL(! "TODO: implement swap. <<
179 SOS_ASSERT_FATAL(SOS_OK == sos_paging_map(pp <<
180 SO <<
181 FA <<
182 SO <<
183 | <<
184 | <<
185 sos_physmem_unref_physpage(ppage_paddr); <<
186 <<
187 <<
188 } <<
189 <<
190 <<
191 <<
192 <<
193 <<
194 <<
195 <<
196 static void idle_thread() <<
197 { <<
198 sos_ui32_t idle_twiddle = 0; <<
199 <<
200 while (1) <<
201 { <<
202 <<
203 <<
204 asm("hlt\n"); <<
205 <<
206 idle_twiddle ++; <<
207 display_bits(0, 0, SOS_X86_VIDEO_FG_GREE <<
208 idle_twiddle); <<
209 <<
210 <<
211 sos_thread_yield(); <<
212 } <<
213 } <<
214 <<
215 <<
216 <<
217 <<
218 <<
219 #define LOAD_DISPLAY_BASELINE 4 <<
220 #define LOAD_DISPLAY_STARTROW 34 <<
221 static void stat_thread() <<
222 { <<
223 while (1) <<
224 { <<
225 sos_ui32_t flags; <<
226 sos_ui32_t load1, load5, load15; <<
227 char str1[11], str5[11], str15[11]; <<
228 struct sos_time t; <<
229 t.sec = 1; <<
230 t.nanosec = 0; <<
231 <<
232 sos_thread_sleep(& t); <<
233 <<
234 sos_disable_IRQs(flags); <<
235 <<
236 <<
237 sos_load_get_sload(&load1, &load5, &load <<
238 sos_load_to_string(str1, load1); <<
239 sos_load_to_string(str5, load5); <<
240 sos_load_to_string(str15, load15); <<
241 sos_x86_videomem_printf(LOAD_DISPLAY_BAS <<
242 SOS_X86_VIDEO_FG <<
243 "Kernel (- Idle) <<
244 str1, str5, str1 <<
245 <<
246 sos_load_get_uload(&load1, &load5, &load <<
247 sos_load_to_string(str1, load1); <<
248 sos_load_to_string(str5, load5); <<
249 sos_load_to_string(str15, load15); <<
250 sos_x86_videomem_printf(LOAD_DISPLAY_BAS <<
251 SOS_X86_VIDEO_FG <<
252 "User: %s %s %s <<
253 str1, str5, str1 <<
254 <<
255 sos_load_get_uratio(&load1, &load5, &loa <<
256 sos_load_to_string(str1, load1); <<
257 sos_load_to_string(str5, load5); <<
258 sos_load_to_string(str15, load15); <<
259 sos_x86_videomem_printf(LOAD_DISPLAY_BAS <<
260 SOS_X86_VIDEO_FG <<
261 "User CPU %%: %s <<
262 str1, str5, str1 <<
263 <<
264 <<
265 sos_load_get_sratio(&load1, &load5, &loa <<
266 sos_load_to_string(str1, load1); <<
267 sos_load_to_string(str5, load5); <<
268 sos_load_to_string(str15, load15); <<
269 sos_x86_videomem_printf(LOAD_DISPLAY_BAS <<
270 SOS_X86_VIDEO_FG <<
271 "Kernel CPU %% ( <<
272 str1, str5, str1 <<
273 sos_restore_IRQs(flags); <<
274 } <<
275 } <<
276 <<
277 <<
278 <<
279 <<
280 <<
281 static sos_ret_t <<
282 start_init(struct sos_fs_manager_instance * ro <<
283 { <<
284 sos_ret_t retval; <<
285 struct sos_umem_vmm_as *as_init; <<
286 struct sos_process *proc_init; <<
287 struct sos_thread *new_thr; <<
288 sos_uaddr_t ustack, start_uaddr; <<
289 struct sos_fs_opened_file * init_root, * ini <<
290 <<
291 <<
292 proc_init = sos_process_create("init", FALSE <<
293 if (! proc_init) <<
294 return -SOS_ENOMEM; <<
295 as_init = sos_process_get_address_space(proc <<
296 <<
297 <<
298 <<
299 <<
300 <<
301 <<
302 <<
303 retval = sos_fs_new_opened_file(proc_init, r <<
304 SOS_FS_OPEN_ <<
305 & init_root) <<
306 if (SOS_OK != retval) <<
307 { <<
308 sos_process_unref(proc_init); <<
309 return -SOS_ENOENT; <<
310 } <<
311 <<
312 <<
313 <<
314 retval = sos_fs_duplicate_opened_file(init_r <<
315 & init <<
316 if (SOS_OK != retval) <<
317 { <<
318 sos_fs_close(init_root); <<
319 sos_process_unref(proc_init); <<
320 return -SOS_ENOENT; <<
321 } <<
322 <<
323 <<
324 if ( ( SOS_OK != sos_process_chroot(proc_ini <<
325 || ( SOS_OK != sos_process_chdir(proc_i <<
326 { <<
327 sos_fs_close(init_root); <<
328 sos_fs_close(init_cwd); <<
329 sos_process_chroot(proc_init, NULL, & un <<
330 sos_process_chdir(proc_init, NULL, & unu <<
331 sos_process_unref(proc_init); <<
332 return -SOS_ENOENT; <<
333 } <<
334 <<
335 <<
336 <<
337 <<
338 start_uaddr = sos_binfmt_elf32_map(as_init, <<
339 if (0 == start_uaddr) <<
340 { <<
341 sos_process_unref(proc_init); <<
342 return -SOS_ENOENT; <<
343 } <<
344 <<
345 <<
346 ustack = (SOS_PAGING_TOP_USER_ADDRESS - SOS_ <<
347 retval = sos_dev_zero_map(as_init, &ustack, <<
348 SOS_VM_MAP_PROT_RE <<
349 0); <<
350 if (SOS_OK != retval) <<
351 { <<
352 sos_process_unref(proc_init); <<
353 return -SOS_ENOMEM; <<
354 } <<
355 <<
356 <<
357 new_thr = sos_create_user_thread(NULL, <<
358 proc_init, <<
359 start_uaddr <<
360 0, 0, <<
361 ustack + SO <<
362 SOS_SCHED_P <<
363 if (! new_thr) <<
364 { <<
365 sos_process_unref(proc_init); <<
366 return -SOS_ENOMEM; <<
367 } <<
368 <<
369 sos_process_unref(proc_init); <<
370 return SOS_OK; <<
371 } 074 }
372 075
373 !! 076
374 !! 077 void sos_main(unsigned long magic, unsigned long addr)
375 <<
376 <<
377 void sos_main(unsigned long magic, unsigned lo <<
378 { 078 {
379 unsigned i; 079 unsigned i;
380 sos_paddr_t sos_kernel_core_base_paddr, sos_ <<
381 struct sos_time tick_resolution; <<
382 struct sos_fs_manager_instance * rootfs; <<
383 080
384 !! 081
385 unsigned long int upper_mem = 0; !! 082
>> 083
>> 084 multiboot_info_t *mbi;
>> 085 mbi = (multiboot_info_t *) addr;
386 086
387 087
388 sos_bochs_subsystem_setup(); !! 088 sos_bochs_setup();
389 089
390 sos_x86_videomem_setup(); 090 sos_x86_videomem_setup();
391 sos_x86_videomem_cls(SOS_X86_VIDEO_BG_BLUE); 091 sos_x86_videomem_cls(SOS_X86_VIDEO_BG_BLUE);
392 092
393 093
394 if (magic == MULTIBOOT_BOOTLOADER_MAGIC) 094 if (magic == MULTIBOOT_BOOTLOADER_MAGIC)
395 { !! 095
396 !! 096 sos_x86_videomem_printf(1, 0,
397 !! 097 SOS_X86_VIDEO_FG_YELLOW | SOS_X86_VIDEO_BG_BLUE,
398 !! 098 "Welcome From GRUB to %s%c RAM is %dMB (upper mem = 0x%x kB)",
399 multiboot_info_t *mbi = (multiboot_info_ !! 099 "SOS", ',',
400 !! 100 (unsigned)(mbi->mem_upper >> 10) + 1,
401 !! 101 (unsigned)mbi->mem_upper);
402 <<
403 <<
404 <<
405 upper_mem = mbi->mem_upper; <<
406 sos_x86_videomem_printf(1, 0, <<
407 SOS_X86_VIDEO_FG <<
408 "Welcome From GR <<
409 "SOS article 9", <<
410 (unsigned)(upper <<
411 (unsigned)upper_ <<
412 } <<
413 else if (magic == 0x42244224) <<
414 { <<
415 <<
416 upper_mem = arg; <<
417 sos_x86_videomem_printf(1, 0, <<
418 SOS_X86_VIDEO_FG <<
419 "Welcome to %s%c <<
420 "SOS article 9", <<
421 (unsigned)(upper <<
422 (unsigned)upper_ <<
423 } <<
424 else 102 else
425 !! 103
426 sos_x86_videomem_printf(1, 0, 104 sos_x86_videomem_printf(1, 0,
427 SOS_X86_VIDEO_FG_Y 105 SOS_X86_VIDEO_FG_YELLOW | SOS_X86_VIDEO_BG_BLUE,
428 "Welcome to SOS ar !! 106 "Welcome to SOS");
429 107
430 sos_bochs_putstring("Message in a bochs: Thi !! 108 sos_bochs_putstring("Message in a bochs\n");
431 109
432 110
433 sos_gdt_subsystem_setup(); !! 111 sos_gdt_setup();
434 sos_idt_subsystem_setup(); !! 112 sos_idt_setup();
435 113
436 114
437 sos_exception_subsystem_setup(); !! 115 sos_exceptions_setup();
438 sos_irq_subsystem_setup(); !! 116 sos_irq_setup();
439 117
440 118
441 sos_i8254_set_frequency(100); 119 sos_i8254_set_frequency(100);
442 120
443 <<
444 <<
445 tick_resolution = (struct sos_time) { .sec=0 <<
446 sos_time_subsysem_setup(& tick_resolution); <<
447 <<
448 <<
449 if (upper_mem == 0) <<
450 { <<
451 sos_x86_videomem_putstring(20, 0, <<
452 SOS_X86_VIDEO <<
453 | SOS_X86_V <<
454 | SOS_X86_V <<
455 "I don't know <<
456 <<
457 for (;;) <<
458 continue; <<
459 } <<
460 <<
461 <<
462 <<
463 <<
464 <<
465 121
466 sos_irq_set_routine(SOS_IRQ_TIMER, 122 sos_irq_set_routine(SOS_IRQ_TIMER,
467 clk_it); !! 123 clk_it);
468 !! 124 sos_exception_set_routine(SOS_EXCEPT_DIVIDE_ERROR,
469 !! 125 divide_ex);
470 <<
471 <<
472 <<
473 SOS_ASSERT_FATAL(SOS_OK <<
474 == sos_physmem_subsystem_se <<
475 <<
476 <<
477 <<
478 <<
479 <<
480 <<
481 <<
482 <<
483 <<
484 SOS_ASSERT_FATAL(SOS_OK == <<
485 sos_paging_subsystem_setup( <<
486 <<
487 <<
488 <<
489 sos_exception_set_routine(SOS_EXCEPT_PAGE_FA <<
490 pgflt_ex); <<
491 <<
492 <<
493 <<
494 <<
495 <<
496 if (sos_kmem_vmm_subsystem_setup(sos_kernel_ <<
497 sos_kernel_ <<
498 bootstrap_s <<
499 bootstrap_s <<
500 + bootstrap <<
501 sos_bochs_printf("Could not setup the Kern <<
502 <<
503 if (sos_kmalloc_subsystem_setup()) <<
504 sos_bochs_printf("Could not setup the Kmal <<
505 <<
506 <<
507 <<
508 <<
509 sos_mm_context_subsystem_setup(); <<
510 <<
511 <<
512 <<
513 <<
514 sos_cpu_context_subsystem_setup(); <<
515 <<
516 <<
517 <<
518 <<
519 sos_swintr_subsystem_setup(); <<
520 <<
521 <<
522 <<
523 <<
524 <<
525 <<
526 <<
527 sos_thread_subsystem_setup(bootstrap_stack_b <<
528 bootstrap_stack_s <<
529 <<
530 <<
531 sos_sched_subsystem_setup(); <<
532 <<
533 <<
534 SOS_ASSERT_FATAL(sos_create_kernel_thread("i <<
535 SO <<
536 <<
537 <<
538 sos_load_subsystem_setup(); <<
539 <<
540 <<
541 SOS_ASSERT_FATAL(sos_create_kernel_thread("s <<
542 NU <<
543 SO <<
544 <<
545 <<
546 <<
547 <<
548 <<
549 sos_umem_vmm_subsystem_setup(); <<
550 sos_dev_zero_subsystem_setup(); <<
551 sos_dev_mem_chardev_setup(); <<
552 <<
553 <<
554 <<
555 <<
556 sos_process_subsystem_setup(); <<
557 <<
558 <<
559 126
560 !! 127
561 asm volatile ("sti\n"); 128 asm volatile ("sti\n");
562 129
>> 130
>> 131
>> 132
>> 133
>> 134 i = 10;
>> 135 while (1)
>> 136 {
>> 137
>> 138 sos_bochs_printf("i = 1 / %d...\n", i);
>> 139 i = 1 / i;
>> 140 }
563 141
564 SOS_ASSERT_FATAL(SOS_OK == sos_fs_virtfs_sub !! 142
565 SOS_ASSERT_FATAL(SOS_OK == sos_fs_subsystem_ !! 143
566 !! 144
567 !! 145
568 !! 146 sos_x86_videomem_putstring(2, 0,
569 !! 147 SOS_X86_VIDEO_FG_LTRED | SOS_X86_VIDEO_BG_BLUE,
570 !! 148 "Invisible");
571 tty_subsystem_setup(); <<
572 sos_ttyS0_subsystem_setup(); <<
573 sos_console_subsystem_setup(); <<
574 <<
575 <<
576 <<
577 149
578 !! 150 return;
579 <<
580 start_init(rootfs); <<
581 <<
582 <<
583 <<
584 <<
585 <<
586 <<
587 <<
588 <<
589 <<
590 <<
591 <<
592 <<
593 sos_bochs_printf("Bye from primary thread !\ <<
594 sos_thread_exit(); <<
595 SOS_FATAL_ERROR("No trespassing !"); <<
596 } 151 }