| 16,7 → 16,7 |
|---|
| align 4 |
| preinit_mem: |
| |
| ; clear [0x280000..HEAP_BASE] |
| ; clear [CLEAN_ZONE..HEAP_BASE] |
| xor eax,eax |
| mov edi, CLEAN_ZONE ; 0x280000 = ramdisk FAT ? |
| mov ecx,(HEAP_BASE-OS_BASE-CLEAN_ZONE) / 4 |
| 83,24 → 83,20 |
|---|
| mov eax, PG_LARGE+PG_SW |
| mov cr4, ebx |
| dec [pg_data.kernel_tables-OS_BASE] |
| sub [pg_data.kernel_pages -OS_BASE], 1024 ; 1 large page = 1024 ordinary pages |
| |
| mov [edx], eax ; map first (physical) 4M bytes |
| add edx, 4 |
| |
| mov edi, [tmp_page_tabs] |
| mov ecx, [pg_data.kernel_pages -OS_BASE] ; map the rest of kernel space |
| mov eax, 0x00400000+PG_SW |
| .map_kernel_pages: |
| stosd |
| add eax, 4096 |
| dec ecx |
| jnz .map_kernel_pages |
| mov ecx, [pg_data.kernel_pages -OS_BASE] ; safety cleaning of already-zeroed space |
| xor eax, eax |
| rep stosd |
| |
| mov ecx, [pg_data.kernel_tables-OS_BASE] ; build some PDEs to hold empty PTEs |
| mov eax, [tmp_page_tabs] |
| or eax, PG_SW |
| mov edi, edx ; edi = sys_pgdir+0x804 |
| |
| .map_kernel_tabs: |
| stosd |
| add eax, 0x1000 |