| 27,8 → 27,50 |
|---|
| */ |
| |
| #include <mm/page.h> |
| #include <mm/frame.h> |
| #include <arch/mm/page.h> |
| #include <arch/interrupt.h> |
| #include <arch/asm.h> |
| #include <config.h> |
| |
| #include <memstr.h> |
| |
| |
| __address bootstrap_dba; |
| |
| void page_arch_init(void) |
| { |
| __address dba; |
| count_t i; |
| |
| if (config.cpu_active == 1) { |
| dba = frame_alloc(FRAME_KA | FRAME_PANIC); |
| memsetb(dba, PAGE_SIZE, 0); |
| |
| bootstrap_dba = dba; |
| |
| /* |
| * Identity mapping for all frames. |
| * PA2KA(identity) mapping for all frames. |
| */ |
| for (i = 0; i < frames; i++) { |
| map_page_to_frame(i * PAGE_SIZE, i * PAGE_SIZE, PAGE_CACHEABLE | PAGE_EXEC, KA2PA(dba)); |
| map_page_to_frame(PA2KA(i * PAGE_SIZE), i * PAGE_SIZE, PAGE_CACHEABLE | PAGE_EXEC, KA2PA(dba)); |
| } |
| |
| trap_register(14, page_fault); |
| write_cr3(KA2PA(dba)); |
| } |
| else { |
| /* |
| * Application processors need to create their own view of the |
| * virtual address space. Because of that, each AP copies |
| * already-initialized paging information from the bootstrap |
| * processor and adjusts it to fulfill its needs. |
| */ |
| |
| dba = frame_alloc(FRAME_KA | FRAME_PANIC); |
| memcpy((void *)dba, (void *)bootstrap_dba , PAGE_SIZE); |
| write_cr3(KA2PA(dba)); |
| } |
| } |