| 8,161 → 8,10 |
|---|
| $Revision$ |
| |
| |
| MEM_WB equ 6 ;write-back memory |
| MEM_WC equ 1 ;write combined memory |
| MEM_UC equ 0 ;uncached memory |
| |
| |
| align 4 |
| proc init_mem |
| |
| mov ecx, [0x2F0000 + 0x9100] |
| mov esi, 0x2F0000 + 0x9104 |
| xor eax, eax |
| @@: |
| cmp dword [esi+16], 1 |
| jne .next |
| mov edx, [esi+8] |
| cmp eax, [esi+8] |
| ja .next |
| |
| mov eax, [esi+8] |
| .next: |
| add esi, 20 |
| loop @B |
| |
| and eax, -4096 |
| |
| mov [MEM_AMOUNT-OS_BASE], eax |
| mov [pg_data.mem_amount-OS_BASE], eax |
| |
| shr eax, 12 |
| mov edx, eax |
| mov [pg_data.pages_count-OS_BASE], eax |
| shr eax, 3 |
| mov [pg_data.pagemap_size-OS_BASE], eax |
| |
| add eax, (sys_pgmap-OS_BASE)+4095 |
| and eax, not 4095 |
| mov [tmp_page_tabs], eax |
| |
| cmp edx, (OS_BASE/4096) |
| jbe @F |
| mov edx, (OS_BASE/4096) |
| jmp .set |
| @@: |
| cmp edx, (HEAP_MIN_SIZE/4096) |
| jae .set |
| mov edx, (HEAP_MIN_SIZE/4096) |
| .set: |
| mov [pg_data.kernel_pages-OS_BASE], edx |
| shr edx, 10 |
| mov [pg_data.kernel_tables-OS_BASE], edx |
| |
| xor eax, eax |
| mov edi, sys_pgdir-OS_BASE |
| mov ecx, 4096/4 |
| cld |
| rep stosd |
| |
| mov edx, (sys_pgdir-OS_BASE)+ (OS_BASE shr 20) |
| bt [cpu_caps-OS_BASE], CAPS_PSE |
| jnc .no_PSE |
| |
| mov ebx, cr4 |
| or ebx, CR4_PSE |
| mov eax, PG_LARGE+PG_SW |
| mov cr4, ebx |
| dec [pg_data.kernel_tables-OS_BASE] |
| |
| mov [edx], eax |
| add eax, 0x00400000 |
| add edx, 4 |
| |
| mov eax, 0x400000+PG_SW |
| mov ecx, [tmp_page_tabs] |
| sub ecx, 0x400000 |
| shr ecx, 12 ;ecx/=4096 |
| jmp .map_low |
| .no_PSE: |
| mov eax, PG_SW |
| mov ecx, [tmp_page_tabs] |
| shr ecx, 12 |
| .map_low: |
| mov edi, [tmp_page_tabs] |
| @@: ; |
| stosd |
| add eax, 0x1000 |
| dec ecx |
| jnz @B |
| |
| mov ecx, [pg_data.kernel_tables-OS_BASE] |
| shl ecx, 10 |
| xor eax, eax |
| rep stosd |
| |
| mov ecx, [pg_data.kernel_tables-OS_BASE] |
| mov eax, [tmp_page_tabs] |
| or eax, PG_SW |
| mov edi, edx |
| |
| .map_kernel_tabs: |
| |
| stosd |
| add eax, 0x1000 |
| dec ecx |
| jnz .map_kernel_tabs |
| |
| mov dword [sys_pgdir-OS_BASE+(page_tabs shr 20)], sys_pgdir+PG_SW-OS_BASE |
| |
| mov edi, (sys_pgdir-OS_BASE) |
| lea esi, [edi+(OS_BASE shr 20)] |
| movsd |
| movsd |
| ret |
| endp |
| |
| align 4 |
| proc init_page_map |
| |
| mov edi, sys_pgmap-OS_BASE |
| mov ecx, [pg_data.pagemap_size-OS_BASE] |
| shr ecx, 2 |
| or eax, -1 |
| cld |
| rep stosd |
| |
| mov ecx, [tmp_page_tabs] |
| mov edx, [pg_data.pages_count-OS_BASE] |
| shr ecx, 12 |
| add ecx, [pg_data.kernel_tables-OS_BASE] |
| sub edx, ecx |
| mov [pg_data.pages_free-OS_BASE], edx |
| |
| mov edi, sys_pgmap-OS_BASE |
| mov ebx, ecx |
| shr ecx, 5 |
| xor eax, eax |
| rep stosd |
| |
| not eax |
| mov ecx, ebx |
| and ecx, 31 |
| shl eax, cl |
| mov [edi], eax |
| add edi, OS_BASE |
| mov [page_start-OS_BASE], edi; |
| |
| mov ebx, sys_pgmap |
| add ebx, [pg_data.pagemap_size-OS_BASE] |
| mov [page_end-OS_BASE], ebx |
| |
| mov [pg_data.pg_mutex-OS_BASE], 0 |
| ret |
| endp |
| |
| align 4 |
| |
| init_BIOS32: |
| mov edi, 0xE0000 |
| .pcibios_nxt: |