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| Rev 110 | Rev 113 | ||
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| Line 390... | Line 390... | ||
| 390 | break; |
390 | break; |
| 391 | } |
391 | } |
| 392 | } |
392 | } |
| 393 | } |
393 | } |
| 394 | 394 | ||
| - | 395 | ||
| 395 | /* |
396 | /* |
| 396 | * Kernel thread for bringing up application processors. It becomes clear |
397 | * Kernel thread for bringing up application processors. It becomes clear |
| 397 | * that we need an arrangement like this (AP's being initialized by a kernel |
398 | * that we need an arrangement like this (AP's being initialized by a kernel |
| 398 | * thread), for a thread has its dedicated stack. (The stack used during the |
399 | * thread), for a thread has its dedicated stack. (The stack used during the |
| 399 | * BSP initialization (prior the very first call to scheduler()) will be used |
400 | * BSP initialization (prior the very first call to scheduler()) will be used |
| Line 412... | Line 413... | ||
| 412 | * Processor entries immediately follow the configuration table header. |
413 | * Processor entries immediately follow the configuration table header. |
| 413 | */ |
414 | */ |
| 414 | pr = processor_entries; |
415 | pr = processor_entries; |
| 415 | 416 | ||
| 416 | /* |
417 | /* |
| 417 | * Grab a frame and map its address to page 0. This is a hack which |
- | |
| 418 | * accesses data in frame 0. Note that page 0 is not present because |
- | |
| 419 | * of nil reference bug catching. |
418 | * We need to access data in frame 0. |
| 420 | */ |
419 | */ |
| 421 | frame = frame_alloc(FRAME_KA); |
420 | frame = frame_alloc(0); |
| 422 | map_page_to_frame(frame,0,PAGE_CACHEABLE,0); |
421 | map_page_to_frame(frame,0,PAGE_CACHEABLE,0); |
| 423 | 422 | ||
| 424 | /* |
423 | /* |
| 425 | * Set the warm-reset vector to the real-mode address of 4K-aligned ap_boot() |
424 | * Set the warm-reset vector to the real-mode address of 4K-aligned ap_boot() |
| 426 | */ |
425 | */ |
| Line 471... | Line 470... | ||
| 471 | if (!(gdt_new = (struct descriptor *) malloc(GDT_ITEMS*sizeof(struct descriptor)))) |
470 | if (!(gdt_new = (struct descriptor *) malloc(GDT_ITEMS*sizeof(struct descriptor)))) |
| 472 | panic("couldn't allocate memory for GDT\n"); |
471 | panic("couldn't allocate memory for GDT\n"); |
| 473 | 472 | ||
| 474 | memcopy(gdt, gdt_new, GDT_ITEMS*sizeof(struct descriptor)); |
473 | memcopy(gdt, gdt_new, GDT_ITEMS*sizeof(struct descriptor)); |
| 475 | gdtr.base = KA2PA((__address) gdt_new); |
474 | gdtr.base = KA2PA((__address) gdt_new); |
| 476 | 475 | ||
| 477 | if (l_apic_send_init_ipi(pr[i].l_apic_id)) { |
476 | if (l_apic_send_init_ipi(pr[i].l_apic_id)) { |
| 478 | /* |
477 | /* |
| 479 | * There may be just one AP being initialized at |
478 | * There may be just one AP being initialized at |
| 480 | * the time. After it comes completely up, it is |
479 | * the time. After it comes completely up, it is |
| 481 | * supposed to wake us up. |
480 | * supposed to wake us up. |