| 53,19 → 53,22 |
|---|
| __u32 i; |
| |
| if (config.cpu_active == 1) { |
| dba = frame_alloc(FRAME_KA | FRAME_PANIC); |
| dba = KA2PA(frame_alloc(FRAME_KA | FRAME_PANIC)); |
| memsetb(dba, PAGE_SIZE, 0); |
| cpu_write_dba(dba); |
| |
| bootstrap_dba = dba; |
| |
| /* |
| * Identity mapping for all but 0th page. |
| * PA2KA(identity) mapping for all but 0th page. |
| */ |
| for (i = 1; i < frames; i++) |
| for (i = 1; i < frames; i++) { |
| map_page_to_frame(i * PAGE_SIZE, i * PAGE_SIZE, PAGE_CACHEABLE, 0); |
| map_page_to_frame(PA2KA(i * PAGE_SIZE), i * PAGE_SIZE, PAGE_CACHEABLE, 0); |
| } |
| |
| trap_register(14, page_fault); |
| cpu_write_dba(dba); |
| } |
| else { |
| |
| 104,7 → 107,9 |
|---|
| __address dba, newpt; |
| int pde, pte; |
| |
| dba = cpu_read_dba(); |
| // TODO: map_page_to_frame should take dba as a parameter |
| // dba = cpu_read_dba(); |
| dba = bootstrap_dba; |
| |
| pde = page >> 22; /* page directory entry */ |
| pte = (page >> 12) & 0x3ff; /* page table entry */ |
| 116,7 → 121,7 |
|---|
| * There is currently no page table for this address. Allocate |
| * frame for the page table and clean it. |
| */ |
| newpt = frame_alloc(FRAME_KA); |
| newpt = KA2PA(frame_alloc(FRAME_KA)); |
| pd[pde].frame_address = newpt >> 12; |
| memsetb(newpt, PAGE_SIZE, 0); |
| pd[pde].present = 1; |
| 123,7 → 128,7 |
|---|
| pd[pde].uaccessible = 1; |
| } |
| if (copy) { |
| newpt = frame_alloc(FRAME_KA); |
| newpt = KA2PA(frame_alloc(FRAME_KA)); |
| memcopy(pd[pde].frame_address << 12, newpt, PAGE_SIZE); |
| pd[pde].frame_address = newpt >> 12; |
| } |