| 48,7 → 48,7 |
|---|
| vm_t *vm_create(pte_t *ptl0) |
| { |
| vm_t *m; |
| |
| |
| m = (vm_t *) malloc(sizeof(vm_t)); |
| if (m) { |
| spinlock_initialize(&m->lock); |
| 58,17 → 58,19 |
|---|
| * Each vm_t is supposed to have its own page table. |
| * It is either passed one or it has to allocate and set one up. |
| */ |
| if (!(m->ptl0 = ptl0)) { |
| m->ptl0 = ptl0; |
| if (!m->ptl0) { |
| pte_t *src_ptl0, *dst_ptl0; |
| |
| src_ptl0 = (pte_t *) PA2KA(GET_PTL0_ADDRESS()); |
| src_ptl0 = (pte_t *) PA2KA((__address) GET_PTL0_ADDRESS()); |
| dst_ptl0 = (pte_t *) frame_alloc(FRAME_KA | FRAME_PANIC); |
| memsetb((__address) dst_ptl0, PAGE_SIZE, 0); |
| memcopy((__address) &src_ptl0[KAS_START_INDEX], (__address) &dst_ptl0[KAS_START_INDEX], KAS_INDICES*sizeof(pte_t)); |
| m->ptl0 = (pte_t *) KA2PA(dst_ptl0); |
| // memsetb((__address) dst_ptl0, PAGE_SIZE, 0); |
| // memcopy((__address) &src_ptl0[KAS_START_INDEX], (__address) &dst_ptl0[KAS_START_INDEX], KAS_INDICES*sizeof(pte_t)); |
| memcopy(PA2KA((__address) GET_PTL0_ADDRESS()), (__address) dst_ptl0, PAGE_SIZE); |
| m->ptl0 = (pte_t *) KA2PA((__address) dst_ptl0); |
| } |
| } |
| |
| |
| return m; |
| } |
| |