;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; ;; ;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;; ;; Distributed under terms of the GNU General Public License ;; ;; ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; $Revision$ MEM_WB equ 6 ;write-back memory MEM_WC equ 1 ;write combined memory MEM_UC equ 0 ;uncached memory align 4 proc mem_test ; if we have BIOS with fn E820, skip the test cmp dword [BOOT_VAR-OS_BASE + 0x9100], 0 jnz .ret mov eax, cr0 and eax, not (CR0_CD+CR0_NW) or eax, CR0_CD ;disable caching mov cr0, eax wbinvd ;invalidate cache xor edi, edi mov ebx, 'TEST' @@: add edi, 0x100000 xchg ebx, dword [edi] cmp dword [edi], 'TEST' xchg ebx, dword [edi] je @b and eax, not (CR0_CD+CR0_NW) ;enable caching mov cr0, eax inc dword [BOOT_VAR-OS_BASE + 0x9100] xor eax, eax mov [BOOT_VAR-OS_BASE + 0x9104], eax mov [BOOT_VAR-OS_BASE + 0x9108], eax mov [BOOT_VAR-OS_BASE + 0x910C], edi mov [BOOT_VAR-OS_BASE + 0x9110], eax .ret: ret endp align 4 proc init_mem ; calculate maximum allocatable address and number of allocatable pages mov edi, BOOT_VAR-OS_BASE + 0x9104 mov ecx, [edi-4] xor esi, esi ; esi will hold total amount of memory xor edx, edx ; edx will hold maximum allocatable address .calcmax: ; round all to pages mov eax, [edi] test eax, 0xFFF jz @f neg eax and eax, 0xFFF add [edi], eax adc dword [edi+4], 0 sub [edi+8], eax sbb dword [edi+12], 0 jc .unusable @@: and dword [edi+8], not 0xFFF jz .unusable ; ignore memory after 4 Gb cmp dword [edi+4], 0 jnz .unusable mov eax, [edi] cmp dword [edi+12], 0 jnz .overflow add eax, [edi+8] jnc @f .overflow: mov eax, 0xFFFFF000 @@: cmp edx, eax jae @f mov edx, eax @@: sub eax, [edi] mov [edi+8], eax add esi, eax jmp .usable .unusable: and dword [edi+8], 0 .usable: add edi, 20 loop .calcmax .calculated: mov [MEM_AMOUNT-OS_BASE], esi mov [pg_data.mem_amount-OS_BASE], esi shr esi, 12 mov [pg_data.pages_count-OS_BASE], esi shr edx, 12 add edx, 31 and edx, not 31 shr edx, 3 mov [pg_data.pagemap_size-OS_BASE], edx add edx, (sys_pgmap-OS_BASE)+4095 and edx, not 4095 mov [tmp_page_tabs], edx mov edx, esi and edx, -1024 cmp edx, (OS_BASE/4096) jbe @F mov edx, (OS_BASE/4096) jmp .set @@: cmp edx, (HEAP_BASE-OS_BASE+HEAP_MIN_SIZE)/4096 jae .set mov edx, (HEAP_BASE-OS_BASE+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)+ 0x800; (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 edx, 4 mov edi, [tmp_page_tabs] jmp .map_kernel_heap ; new kernel fits to the first 4Mb - nothing to do with ".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 .map_kernel_heap: 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 ; mark all memory as unavailable mov edi, sys_pgmap-OS_BASE mov ecx, [pg_data.pagemap_size-OS_BASE] shr ecx, 2 xor eax, eax cld rep stosd ; scan through memory map and mark free areas as available mov ebx, BOOT_VAR-OS_BASE + 0x9104 mov edx, [ebx-4] .scanmap: mov ecx, [ebx+8] shr ecx, 12 ; ecx = number of pages jz .next mov edi, [ebx] shr edi, 12 ; edi = first page mov eax, edi shr edi, 5 shl edi, 2 add edi, sys_pgmap-OS_BASE and eax, 31 jz .startok add ecx, eax sub ecx, 32 jbe .onedword push ecx mov ecx, eax or eax, -1 shl eax, cl or [edi], eax add edi, 4 pop ecx .startok: push ecx shr ecx, 5 or eax, -1 rep stosd pop ecx and ecx, 31 neg eax shl eax, cl dec eax or [edi], eax jmp .next .onedword: add ecx, 32 sub ecx, eax @@: bts [edi], eax inc eax loop @b .next: add ebx, 20 dec edx jnz .scanmap ; mark kernel memory as allocated (unavailable) 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 and [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: cmp dword[edi], '_32_' ; "magic" word je .BIOS32_found .pcibios_nxt2: add edi, 0x10 cmp edi, 0xFFFF0 je .BIOS32_not_found jmp .pcibios_nxt .BIOS32_found: ; magic word found, check control summ movzx ecx, byte[edi + 9] shl ecx, 4 mov esi, edi xor eax, eax cld ; paranoia @@: lodsb add ah, al loop @b jnz .pcibios_nxt2 ; control summ must be zero ; BIOS32 service found ! mov ebp, [edi + 4] mov [bios32_entry], ebp ; check PCI BIOS present mov eax, '$PCI' xor ebx, ebx push cs ; special for 'ret far' from BIOS call ebp test al, al jnz .PCI_BIOS32_not_found ; ����� ��������� ����������� ��� PCI BIOS add ebx, OS_BASE dec ecx mov [(pci_code_32-OS_BASE)], cx ;limit 0-15 mov [(pci_data_32-OS_BASE)], cx ;limit 0-15 mov [(pci_code_32-OS_BASE)+2], bx ;base 0-15 mov [(pci_data_32-OS_BASE)+2], bx ;base 0-15 shr ebx, 16 mov [(pci_code_32-OS_BASE)+4], bl ;base 16-23 mov [(pci_data_32-OS_BASE)+4], bl ;base 16-23 shr ecx, 16 and cl, 0x0F mov ch, bh add cx, D32 mov [(pci_code_32-OS_BASE)+6], cx ;lim 16-19 & mov [(pci_data_32-OS_BASE)+6], cx ;base 24-31 mov [(pci_bios_entry-OS_BASE)], edx ; jmp .end .PCI_BIOS32_not_found: ; ����� ������ ���������� pci_emu_dat .BIOS32_not_found: .end: ret align 4 proc test_cpu locals cpu_type dd ? cpu_id dd ? cpu_Intel dd ? cpu_AMD dd ? endl xor eax, eax mov [cpu_type], eax mov [cpu_caps-OS_BASE], eax mov [cpu_caps+4-OS_BASE], eax pushfd pop eax mov ecx, eax xor eax, 0x40000 push eax popfd pushfd pop eax xor eax, ecx mov [cpu_type], CPU_386 jz .end_cpuid push ecx popfd mov [cpu_type], CPU_486 mov eax, ecx xor eax, 0x200000 push eax popfd pushfd pop eax xor eax, ecx je .end_cpuid mov [cpu_id], 1 xor eax, eax cpuid mov [cpu_vendor-OS_BASE], ebx mov [cpu_vendor+4-OS_BASE], edx mov [cpu_vendor+8-OS_BASE], ecx cmp ebx, dword [intel_str-OS_BASE] jne .check_AMD cmp edx, dword [intel_str+4-OS_BASE] jne .check_AMD cmp ecx, dword [intel_str+8-OS_BASE] jne .check_AMD mov [cpu_Intel], 1 cmp eax, 1 jl .end_cpuid mov eax, 1 cpuid mov [cpu_sign-OS_BASE], eax mov [cpu_info-OS_BASE], ebx mov [cpu_caps-OS_BASE], edx mov [cpu_caps+4-OS_BASE],ecx shr eax, 8 and eax, 0x0f ret .end_cpuid: mov eax, [cpu_type] ret .check_AMD: cmp ebx, dword [AMD_str-OS_BASE] jne .unknown cmp edx, dword [AMD_str+4-OS_BASE] jne .unknown cmp ecx, dword [AMD_str+8-OS_BASE] jne .unknown mov [cpu_AMD], 1 cmp eax, 1 jl .unknown mov eax, 1 cpuid mov [cpu_sign-OS_BASE], eax mov [cpu_info-OS_BASE], ebx mov [cpu_caps-OS_BASE], edx mov [cpu_caps+4-OS_BASE],ecx shr eax, 8 and eax, 0x0f ret .unknown: mov eax, 1 cpuid mov [cpu_sign-OS_BASE], eax mov [cpu_info-OS_BASE], ebx mov [cpu_caps-OS_BASE], edx mov [cpu_caps+4-OS_BASE],ecx shr eax, 8 and eax, 0x0f ret endp