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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> <<
024 #include <hwcore/gdt.h> <<
025 #include <hwcore/irq.h> <<
026 #include <hwcore/exception.h> <<
027 #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> 022 #include <sos/klibc.h>
040 #include <sos/assert.h> 023 #include <sos/assert.h>
041 #include <drivers/x86_videomem.h> 024 #include <drivers/x86_videomem.h>
042 #include <drivers/bochs.h> 025 #include <drivers/bochs.h>
043 #include <sos/calcload.h> <<
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 #include <sos/blkdev.h> <<
055 #include <sos/fs_pagecache.h> <<
056 #include <drivers/ide.h> <<
057 <<
058 <<
059 <<
060 void display_bits(unsigned char row, unsigned <<
061 unsigned char attribute, <<
062 sos_ui32_t integer) <<
063 { <<
064 int i; <<
065 <<
066 for (i = 31 ; i >= 0 ; i--) <<
067 { <<
068 <<
069 int bit_i = (integer & (1 << i)); <<
070 <<
071 unsigned char ascii_code = bit_i?219:177 <<
072 sos_x86_videomem_putchar(row, col++, <<
073 attribute, <<
074 ascii_code); <<
075 } <<
076 } <<
077 <<
078 <<
079 static void clk_it(int intid) <<
080 { <<
081 static sos_ui32_t clock_count = 0; <<
082 <<
083 display_bits(0, 48, <<
084 SOS_X86_VIDEO_FG_LTGREEN | SOS_ <<
085 clock_count); <<
086 clock_count++; <<
087 026
088 <<
089 sos_time_do_tick(); <<
090 027
091 <<
092 sos_sched_do_timer_tick(); <<
093 } <<
094 028
095 !! 029
096 !! 030 void sos_main(unsigned long magic, unsigned long addr)
097 <<
098 <<
099 <<
100 <<
101 <<
102 static void pgflt_ex(int intid, struct sos_cpu <<
103 { <<
104 static sos_ui32_t demand_paging_count = 0; <<
105 struct sos_thread * cur_thr = sos_thread_get <<
106 sos_vaddr_t faulting_vaddr = sos_cpu_contex <<
107 sos_paddr_t ppage_paddr; <<
108 <<
109 if (sos_cpu_context_is_in_user_mode(ctxt) <<
110 || (cur_thr->fixup_uaccess.return_vaddr) <<
111 { <<
112 __label__ unforce_address_space; <<
113 sos_bool_t need_to_setup_mmu; <<
114 sos_ui32_t errcode = sos_cpu_context_get <<
115 <<
116 <<
117 <<
118 need_to_setup_mmu = (cur_thr->squatted_m <<
119 != sos_process_get_ <<
120 if (need_to_setup_mmu) <<
121 sos_thread_prepare_user_space_access(N <<
122 <<
123 if (SOS_OK == <<
124 sos_umem_vmm_try_resolve_page_fault( <<
125 <<
126 <<
127 goto unforce_address_space; <<
128 <<
129 <<
130 <<
131 if (! sos_cpu_context_is_in_user_mode(ct <<
132 { <<
133 cur_thr->fixup_uaccess.faulted_uaddr <<
134 sos_cpu_context_set_EX_return_addres <<
135 <<
136 goto unforce_address_space; <<
137 } <<
138 <<
139 if (need_to_setup_mmu) <<
140 sos_thread_end_user_space_access(); <<
141 <<
142 sos_bochs_printf("\e[35mTHR %p: Unresolv <<
143 (void*)sos_thread_get_c <<
144 sos_cpu_context_get_PC( <<
145 (unsigned)faulting_vadd <<
146 (unsigned)sos_cpu_conte <<
147 sos_bochs_printf("Terminating User threa <<
148 sos_thread_exit(); <<
149 <<
150 unforce_address_space: <<
151 if (need_to_setup_mmu) <<
152 sos_thread_end_user_space_access(); <<
153 return; <<
154 } <<
155 <<
156 <<
157 if (! sos_kmem_vmm_is_valid_vaddr(faulting_v <<
158 { <<
159 <<
160 <<
161 sos_display_fatal_error("Unresolved page <<
162 sos_cpu_context_ <<
163 (unsigned)faulti <<
164 (unsigned)sos_cp <<
165 SOS_ASSERT_FATAL(! "Got page fault (note <<
166 } <<
167 <<
168 <<
169 <<
170 <<
171 <<
172 <<
173 <<
174 demand_paging_count ++; <<
175 display_bits(0, 0, <<
176 SOS_X86_VIDEO_FG_LTRED | SOS_X8 <<
177 demand_paging_count); <<
178 <<
179 <<
180 ppage_paddr = sos_physmem_ref_physpage_new(F <<
181 if (! ppage_paddr) <<
182 SOS_ASSERT_FATAL(! "TODO: implement swap. <<
183 SOS_ASSERT_FATAL(SOS_OK == sos_paging_map(pp <<
184 SO <<
185 FA <<
186 SO <<
187 | <<
188 | <<
189 sos_physmem_unref_physpage(ppage_paddr); <<
190 <<
191 <<
192 } <<
193 <<
194 <<
195 <<
196 <<
197 <<
198 <<
199 <<
200 static void idle_thread(void* unused) __attrib <<
201 static void idle_thread(void* unused) <<
202 { 031 {
203 sos_ui32_t idle_twiddle = 0; !! 032 unsigned i;
204 033
205 while (1) !! 034
206 { !! 035
207 !! 036
208 !! 037 multiboot_info_t *mbi;
209 asm("hlt\n"); !! 038 mbi = (multiboot_info_t *) addr;
210 <<
211 idle_twiddle ++; <<
212 display_bits(0, 0, SOS_X86_VIDEO_FG_GREE <<
213 idle_twiddle); <<
214 <<
215 <<
216 sos_thread_yield(); <<
217 } <<
218 } <<
219 <<
220 <<
221 <<
222 <<
223 <<
224 #define LOAD_DISPLAY_BASELINE 4 <<
225 #define LOAD_DISPLAY_STARTROW 34 <<
226 static void stat_thread(void * unused) __attri <<
227 static void stat_thread(void * unused) <<
228 { <<
229 while (1) <<
230 { <<
231 sos_ui32_t flags; <<
232 sos_ui32_t load1, load5, load15; <<
233 char str1[11], str5[11], str15[11]; <<
234 struct sos_time t; <<
235 t.sec = 1; <<
236 t.nanosec = 0; <<
237 <<
238 sos_thread_sleep(& t); <<
239 <<
240 sos_disable_IRQs(flags); <<
241 <<
242 <<
243 sos_load_get_sload(&load1, &load5, &load <<
244 sos_load_to_string(str1, load1); <<
245 sos_load_to_string(str5, load5); <<
246 sos_load_to_string(str15, load15); <<
247 sos_x86_videomem_printf(LOAD_DISPLAY_BAS <<
248 SOS_X86_VIDEO_FG <<
249 "Kernel (- Idle) <<
250 str1, str5, str1 <<
251 <<
252 sos_load_get_uload(&load1, &load5, &load <<
253 sos_load_to_string(str1, load1); <<
254 sos_load_to_string(str5, load5); <<
255 sos_load_to_string(str15, load15); <<
256 sos_x86_videomem_printf(LOAD_DISPLAY_BAS <<
257 SOS_X86_VIDEO_FG <<
258 "User: %s %s %s <<
259 str1, str5, str1 <<
260 <<
261 sos_load_get_uratio(&load1, &load5, &loa <<
262 sos_load_to_string(str1, load1); <<
263 sos_load_to_string(str5, load5); <<
264 sos_load_to_string(str15, load15); <<
265 sos_x86_videomem_printf(LOAD_DISPLAY_BAS <<
266 SOS_X86_VIDEO_FG <<
267 "User CPU %%: %s <<
268 str1, str5, str1 <<
269 <<
270 <<
271 sos_load_get_sratio(&load1, &load5, &loa <<
272 sos_load_to_string(str1, load1); <<
273 sos_load_to_string(str5, load5); <<
274 sos_load_to_string(str15, load15); <<
275 sos_x86_videomem_printf(LOAD_DISPLAY_BAS <<
276 SOS_X86_VIDEO_FG <<
277 "Kernel CPU %% ( <<
278 str1, str5, str1 <<
279 sos_restore_IRQs(flags); <<
280 } <<
281 } <<
282 <<
283 <<
284 <<
285 <<
286 <<
287 static sos_ret_t <<
288 start_init(struct sos_fs_manager_instance * ro <<
289 { <<
290 sos_ret_t retval; <<
291 struct sos_umem_vmm_as *as_init; <<
292 struct sos_process *proc_init; <<
293 struct sos_thread *new_thr; <<
294 sos_uaddr_t ustack, start_uaddr; <<
295 struct sos_fs_opened_file * init_root, * ini <<
296 <<
297 <<
298 proc_init = sos_process_create("init", FALSE <<
299 if (! proc_init) <<
300 return -SOS_ENOMEM; <<
301 as_init = sos_process_get_address_space(proc <<
302 <<
303 <<
304 <<
305 <<
306 <<
307 <<
308 <<
309 retval = sos_fs_new_opened_file(proc_init, r <<
310 SOS_FS_OPEN_ <<
311 & init_root) <<
312 if (SOS_OK != retval) <<
313 { <<
314 sos_process_unref(proc_init); <<
315 return -SOS_ENOENT; <<
316 } <<
317 <<
318 <<
319 <<
320 retval = sos_fs_duplicate_opened_file(init_r <<
321 & init <<
322 if (SOS_OK != retval) <<
323 { <<
324 sos_fs_close(init_root); <<
325 sos_process_unref(proc_init); <<
326 return -SOS_ENOENT; <<
327 } <<
328 <<
329 <<
330 if ( ( SOS_OK != sos_process_chroot(proc_ini <<
331 || ( SOS_OK != sos_process_chdir(proc_i <<
332 { <<
333 sos_fs_close(init_root); <<
334 sos_fs_close(init_cwd); <<
335 sos_process_chroot(proc_init, NULL, & un <<
336 sos_process_chdir(proc_init, NULL, & unu <<
337 sos_process_unref(proc_init); <<
338 return -SOS_ENOENT; <<
339 } <<
340 <<
341 <<
342 <<
343 <<
344 start_uaddr = sos_binfmt_elf32_map(as_init, <<
345 if (0 == start_uaddr) <<
346 { <<
347 sos_process_unref(proc_init); <<
348 return -SOS_ENOENT; <<
349 } <<
350 <<
351 <<
352 ustack = (SOS_PAGING_TOP_USER_ADDRESS - SOS_ <<
353 retval = sos_dev_zero_map(as_init, &ustack, <<
354 SOS_VM_MAP_PROT_RE <<
355 0); <<
356 if (SOS_OK != retval) <<
357 { <<
358 sos_process_unref(proc_init); <<
359 return -SOS_ENOMEM; <<
360 } <<
361 <<
362 <<
363 new_thr = sos_create_user_thread(NULL, <<
364 proc_init, <<
365 start_uaddr <<
366 0, 0, <<
367 ustack + SO <<
368 SOS_SCHED_P <<
369 if (! new_thr) <<
370 { <<
371 sos_process_unref(proc_init); <<
372 return -SOS_ENOMEM; <<
373 } <<
374 <<
375 sos_process_unref(proc_init); <<
376 return SOS_OK; <<
377 } <<
378 <<
379 <<
380 <<
381 <<
382 <<
383 <<
384 void sos_main(unsigned long magic, unsigned lo <<
385 __attribute__((noreturn)); <<
386 void sos_main(unsigned long magic, unsigned lo <<
387 { <<
388 sos_paddr_t sos_kernel_core_base_paddr, sos_ <<
389 struct sos_time tick_resolution; <<
390 struct sos_fs_manager_instance * rootfs; <<
391 <<
392 <<
393 unsigned long int upper_mem = 0; <<
394 039
395 040
396 sos_bochs_subsystem_setup(); !! 041 sos_bochs_setup();
397 042
398 sos_x86_videomem_setup(); 043 sos_x86_videomem_setup();
399 sos_x86_videomem_cls(SOS_X86_VIDEO_BG_BLUE); 044 sos_x86_videomem_cls(SOS_X86_VIDEO_BG_BLUE);
400 045
401 046
402 if (magic == MULTIBOOT_BOOTLOADER_MAGIC) 047 if (magic == MULTIBOOT_BOOTLOADER_MAGIC)
403 { !! 048
404 !! 049 sos_x86_videomem_printf(1, 0,
405 !! 050 SOS_X86_VIDEO_FG_YELLOW | SOS_X86_VIDEO_BG_BLUE,
406 !! 051 "Welcome From GRUB to %s%c RAM is %dMB (upper mem = 0x%x kB)",
407 multiboot_info_t *mbi = (multiboot_info_ !! 052 "SOS", ',',
408 !! 053 (unsigned)(mbi->mem_upper >> 10) + 1,
409 !! 054 (unsigned)mbi->mem_upper);
410 <<
411 <<
412 <<
413 upper_mem = mbi->mem_upper; <<
414 sos_x86_videomem_printf(1, 0, <<
415 SOS_X86_VIDEO_FG <<
416 "Welcome From GR <<
417 "SOS article 9.5 <<
418 (unsigned)(upper <<
419 (unsigned)upper_ <<
420 } <<
421 else if (magic == 0x42244224) <<
422 { <<
423 <<
424 upper_mem = arg; <<
425 sos_x86_videomem_printf(1, 0, <<
426 SOS_X86_VIDEO_FG <<
427 "Welcome to %s%c <<
428 "SOS article 9.5 <<
429 (unsigned)(upper <<
430 (unsigned)upper_ <<
431 } <<
432 else 055 else
433 !! 056
434 sos_x86_videomem_printf(1, 0, 057 sos_x86_videomem_printf(1, 0,
435 SOS_X86_VIDEO_FG_Y 058 SOS_X86_VIDEO_FG_YELLOW | SOS_X86_VIDEO_BG_BLUE,
436 "Welcome to SOS ar !! 059 "Welcome to SOS");
>> 060
>> 061 sos_bochs_putstring("Message in a bochs\n");
>> 062
437 063
438 sos_bochs_putstring("Message in a bochs: Thi !! 064
>> 065 for (;;)
>> 066 continue;
439 067
440 !! 068 return;
441 sos_gdt_subsystem_setup(); <<
442 sos_idt_subsystem_setup(); <<
443 <<
444 <<
445 sos_exception_subsystem_setup(); <<
446 sos_irq_subsystem_setup(); <<
447 <<
448 <<
449 sos_i8254_set_frequency(100); <<
450 <<
451 <<
452 <<
453 tick_resolution = (struct sos_time) { .sec=0 <<
454 sos_time_subsysem_setup(& tick_resolution); <<
455 <<
456 <<
457 if (upper_mem == 0) <<
458 { <<
459 sos_x86_videomem_putstring(20, 0, <<
460 SOS_X86_VIDEO <<
461 | SOS_X86_V <<
462 | SOS_X86_V <<
463 "I don't know <<
464 <<
465 for (;;) <<
466 continue; <<
467 } <<
468 <<
469 <<
470 <<
471 <<
472 <<
473 <<
474 sos_irq_set_routine(SOS_IRQ_TIMER, <<
475 clk_it); <<
476 <<
477 <<
478 <<
479 <<
480 <<
481 SOS_ASSERT_FATAL(SOS_OK <<
482 == sos_physmem_subsystem_se <<
483 <<
484 <<
485 <<
486 <<
487 <<
488 <<
489 <<
490 <<
491 <<
492 SOS_ASSERT_FATAL(SOS_OK == <<
493 sos_paging_subsystem_setup( <<
494 <<
495 <<
496 <<
497 sos_exception_set_routine(SOS_EXCEPT_PAGE_FA <<
498 pgflt_ex); <<
499 <<
500 <<
501 <<
502 <<
503 <<
504 if (sos_kmem_vmm_subsystem_setup(sos_kernel_ <<
505 sos_kernel_ <<
506 bootstrap_s <<
507 bootstrap_s <<
508 + bootstrap <<
509 sos_bochs_printf("Could not setup the Kern <<
510 <<
511 if (sos_kmalloc_subsystem_setup()) <<
512 sos_bochs_printf("Could not setup the Kmal <<
513 <<
514 <<
515 <<
516 <<
517 sos_mm_context_subsystem_setup(); <<
518 <<
519 <<
520 <<
521 <<
522 sos_cpu_context_subsystem_setup(); <<
523 <<
524 <<
525 <<
526 <<
527 sos_swintr_subsystem_setup(); <<
528 <<
529 <<
530 <<
531 <<
532 <<
533 <<
534 <<
535 sos_thread_subsystem_setup(bootstrap_stack_b <<
536 bootstrap_stack_s <<
537 <<
538 <<
539 sos_sched_subsystem_setup(); <<
540 <<
541 <<
542 SOS_ASSERT_FATAL(sos_create_kernel_thread("i <<
543 SO <<
544 <<
545 <<
546 sos_load_subsystem_setup(); <<
547 <<
548 <<
549 SOS_ASSERT_FATAL(sos_create_kernel_thread("s <<
550 NU <<
551 SO <<
552 <<
553 <<
554 <<
555 <<
556 <<
557 sos_umem_vmm_subsystem_setup(); <<
558 sos_dev_zero_subsystem_setup(); <<
559 <<
560 <<
561 sos_fs_pagecache_subsystem_setup(); <<
562 sos_blockdev_subsystem_setup(); <<
563 sos_dev_mem_chardev_setup(); <<
564 <<
565 <<
566 <<
567 <<
568 sos_process_subsystem_setup(); <<
569 <<
570 <<
571 <<
572 <<
573 asm volatile ("sti\n"); <<
574 <<
575 <<
576 SOS_ASSERT_FATAL(SOS_OK == sos_fs_virtfs_sub <<
577 SOS_ASSERT_FATAL(SOS_OK == sos_fs_subsystem_ <<
578 <<
579 <<
580 <<
581 <<
582 <<
583 tty_subsystem_setup(); <<
584 sos_ttyS0_subsystem_setup(); <<
585 sos_console_subsystem_setup(); <<
586 <<
587 <<
588 sos_ide_subsystem_setup(); <<
589 <<
590 <<
591 <<
592 <<
593 <<
594 start_init(rootfs); <<
595 <<
596 <<
597 <<
598 <<
599 <<
600 <<
601 <<
602 <<
603 <<
604 <<
605 <<
606 <<
607 sos_bochs_printf("Bye from primary thread !\ <<
608 sos_thread_exit(); <<
609 SOS_FATAL_ERROR("No trespassing !"); <<
610 } 069 }