| 39,6 → 39,7 |
|---|
| #include <interrupt.h> |
| #include <print.h> |
| #include <panic.h> |
| #include <align.h> |
| |
| /* Definitions for identity page mapper */ |
| pte_t helper_ptl1[512] __attribute__((aligned (PAGE_SIZE))); |
| 70,11 → 71,11 |
|---|
| SET_FRAME_ADDRESS_ARCH(ptl3, PTL3_INDEX_ARCH(page), (__address)KA2PA(tgt)); \ |
| SET_FRAME_FLAGS_ARCH(ptl3, PTL3_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \ |
| } |
| |
| void page_arch_init(void) |
| { |
| __address cur; |
| int flags; |
| int i; |
| int identity_flags = PAGE_CACHEABLE | PAGE_EXEC | PAGE_GLOBAL; |
| |
| if (config.cpu_active == 1) { |
| page_mapping_operations = &pt_mapping_operations; |
| 83,11 → 84,22 |
|---|
| * PA2KA(identity) mapping for all frames. |
| */ |
| for (cur = 0; cur < last_frame; cur += FRAME_SIZE) { |
| flags = PAGE_CACHEABLE | PAGE_EXEC; |
| if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size)) |
| flags |= PAGE_GLOBAL; |
| page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags); |
| /* Standard identity mapping */ |
| page_mapping_insert(AS_KERNEL, PA2KA_IDENT(cur), cur, identity_flags); |
| } |
| /* Upper kernel mapping |
| * - from zero to top of kernel (include bottom addresses |
| * because some are needed for init ) |
| */ |
| for (cur = PA2KA_CODE(0); cur < config.base+config.kernel_size; cur += FRAME_SIZE) { |
| page_mapping_insert(AS_KERNEL, cur, KA2PA(cur), identity_flags); |
| } |
| for (i=0; i < init.cnt; i++) { |
| for (cur=init.tasks[i].addr;cur < init.tasks[i].size; cur += FRAME_SIZE) { |
| page_mapping_insert(AS_KERNEL, PA2KA_CODE(KA2PA(cur)), KA2PA(cur), identity_flags); |
| } |
| } |
| |
| exc_register(14, "page_fault", (iroutine)page_fault); |
| write_cr3((__address) AS_KERNEL->page_table); |
| } |