forked from KolibriOS/kolibrios
388 lines
10 KiB
PHP
388 lines
10 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision$
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MEM_WB equ 6 ;write-back memory
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MEM_WC equ 1 ;write combined memory
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MEM_UC equ 0 ;uncached memory
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align 4
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proc init_mem
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; calculate maximum allocatable address and number of allocatable pages
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mov edi, BOOT_VAR-OS_BASE + 0x9104
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mov ecx, [edi-4]
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xor esi, esi ; esi will hold total amount of memory
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xor edx, edx ; edx will hold maximum allocatable address
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.calcmax:
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; round all to pages
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mov eax, [edi]
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test eax, 0xFFF
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jz @f
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neg eax
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and eax, 0xFFF
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add [edi], eax
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adc dword [edi+4], 0
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sub [edi+8], eax
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sbb dword [edi+12], 0
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jc .unusable
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@@:
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and dword [edi+8], not 0xFFF
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jz .unusable
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; ignore memory after 4 Gb
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cmp dword [edi+4], 0
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jnz .unusable
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mov eax, [edi]
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cmp dword [edi+12], 0
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jnz .overflow
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add eax, [edi+8]
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jnc @f
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.overflow:
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mov eax, 0xFFFFF000
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@@:
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cmp edx, eax
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jae @f
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mov edx, eax
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@@:
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sub eax, [edi]
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mov [edi+8], eax
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add esi, eax
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jmp .usable
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.unusable:
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and dword [edi+8], 0
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.usable:
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add edi, 20
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loop .calcmax
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.calculated:
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mov [MEM_AMOUNT-OS_BASE], esi
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mov [pg_data.mem_amount-OS_BASE], esi
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shr esi, 12
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mov [pg_data.pages_count-OS_BASE], esi
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shr edx, 12
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add edx, 31
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and edx, not 31
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shr edx, 3
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mov [pg_data.pagemap_size-OS_BASE], edx
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add edx, (sys_pgmap-OS_BASE)+4095
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and edx, not 4095
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mov [tmp_page_tabs], edx
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mov edx, esi
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and edx, -1024
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cmp edx, (OS_BASE/4096)
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jbe @F
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mov edx, (OS_BASE/4096)
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jmp .set
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@@:
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cmp edx, (HEAP_BASE-OS_BASE+HEAP_MIN_SIZE)/4096
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jae .set
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mov edx, (HEAP_BASE-OS_BASE+HEAP_MIN_SIZE)/4096
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.set:
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mov [pg_data.kernel_pages-OS_BASE], edx
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shr edx, 10
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mov [pg_data.kernel_tables-OS_BASE], edx
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xor eax, eax
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mov edi, sys_pgdir-OS_BASE
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mov ecx, 4096/4
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cld
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rep stosd
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mov edx, (sys_pgdir-OS_BASE)+ 0x800; (OS_BASE shr 20)
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mov ebx, cr4
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or ebx, CR4_PSE
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mov eax, PG_LARGE+PG_SW
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mov cr4, ebx
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dec [pg_data.kernel_tables-OS_BASE]
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mov [edx], eax
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add edx, 4
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mov edi, [tmp_page_tabs]
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mov ecx, [pg_data.kernel_tables-OS_BASE]
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shl ecx, 10
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xor eax, eax
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rep stosd
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mov ecx, [pg_data.kernel_tables-OS_BASE]
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mov eax, [tmp_page_tabs]
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or eax, PG_SW
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mov edi, edx
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.map_kernel_tabs:
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stosd
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add eax, 0x1000
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dec ecx
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jnz .map_kernel_tabs
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mov dword [sys_pgdir-OS_BASE+(page_tabs shr 20)], sys_pgdir+PG_SW-OS_BASE
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mov edi, (sys_pgdir-OS_BASE)
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lea esi, [edi+(OS_BASE shr 20)]
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movsd
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movsd
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ret
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endp
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align 4
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proc init_page_map
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; mark all memory as unavailable
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mov edi, sys_pgmap-OS_BASE
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mov ecx, [pg_data.pagemap_size-OS_BASE]
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shr ecx, 2
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xor eax, eax
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cld
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rep stosd
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; scan through memory map and mark free areas as available
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mov ebx, BOOT_VAR-OS_BASE + 0x9104
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mov edx, [ebx-4]
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.scanmap:
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mov ecx, [ebx+8]
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shr ecx, 12 ; ecx = number of pages
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jz .next
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mov edi, [ebx]
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shr edi, 12 ; edi = first page
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mov eax, edi
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shr edi, 5
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shl edi, 2
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add edi, sys_pgmap-OS_BASE
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and eax, 31
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jz .startok
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add ecx, eax
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sub ecx, 32
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jbe .onedword
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push ecx
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mov ecx, eax
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or eax, -1
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shl eax, cl
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or [edi], eax
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add edi, 4
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pop ecx
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.startok:
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push ecx
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shr ecx, 5
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or eax, -1
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rep stosd
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pop ecx
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and ecx, 31
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neg eax
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shl eax, cl
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dec eax
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or [edi], eax
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jmp .next
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.onedword:
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add ecx, 32
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sub ecx, eax
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@@:
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bts [edi], eax
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inc eax
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loop @b
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.next:
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add ebx, 20
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dec edx
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jnz .scanmap
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; mark kernel memory as allocated (unavailable)
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mov ecx, [tmp_page_tabs]
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mov edx, [pg_data.pages_count-OS_BASE]
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shr ecx, 12
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add ecx, [pg_data.kernel_tables-OS_BASE]
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sub edx, ecx
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mov [pg_data.pages_free-OS_BASE], edx
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mov edi, sys_pgmap-OS_BASE
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mov ebx, ecx
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shr ecx, 5
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xor eax, eax
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rep stosd
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not eax
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mov ecx, ebx
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and ecx, 31
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shl eax, cl
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and [edi], eax
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add edi, OS_BASE
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mov [page_start-OS_BASE], edi;
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mov ebx, sys_pgmap
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add ebx, [pg_data.pagemap_size-OS_BASE]
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mov [page_end-OS_BASE], ebx
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mov [pg_data.pg_mutex-OS_BASE], 0
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ret
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endp
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align 4
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init_BIOS32:
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mov edi, 0xE0000
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.pcibios_nxt:
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cmp dword[edi], '_32_' ; "magic" word
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je .BIOS32_found
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.pcibios_nxt2:
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add edi, 0x10
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cmp edi, 0xFFFF0
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je .BIOS32_not_found
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jmp .pcibios_nxt
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.BIOS32_found: ; magic word found, check control summ
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movzx ecx, byte[edi + 9]
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shl ecx, 4
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mov esi, edi
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xor eax, eax
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cld ; paranoia
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@@: lodsb
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add ah, al
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loop @b
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jnz .pcibios_nxt2 ; control summ must be zero
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; BIOS32 service found !
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mov ebp, [edi + 4]
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mov [bios32_entry], ebp
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; check PCI BIOS present
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mov eax, '$PCI'
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xor ebx, ebx
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push cs ; special for 'ret far' from BIOS
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call ebp
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test al, al
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jnz .PCI_BIOS32_not_found
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; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD> PCI BIOS
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add ebx, OS_BASE
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dec ecx
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mov [(pci_code_32-OS_BASE)], cx ;limit 0-15
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mov [(pci_data_32-OS_BASE)], cx ;limit 0-15
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mov [(pci_code_32-OS_BASE)+2], bx ;base 0-15
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mov [(pci_data_32-OS_BASE)+2], bx ;base 0-15
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shr ebx, 16
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mov [(pci_code_32-OS_BASE)+4], bl ;base 16-23
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mov [(pci_data_32-OS_BASE)+4], bl ;base 16-23
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shr ecx, 16
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and cl, 0x0F
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mov ch, bh
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add cx, D32
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mov [(pci_code_32-OS_BASE)+6], cx ;lim 16-19 &
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mov [(pci_data_32-OS_BASE)+6], cx ;base 24-31
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mov [(pci_bios_entry-OS_BASE)], edx
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; jmp .end
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.PCI_BIOS32_not_found:
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; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> pci_emu_dat
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.BIOS32_not_found:
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.end:
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ret
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align 4
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proc test_cpu
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locals
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cpu_type dd ?
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cpu_id dd ?
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cpu_Intel dd ?
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cpu_AMD dd ?
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endl
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xor eax, eax
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mov [cpu_type], eax
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mov [cpu_caps-OS_BASE], eax
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mov [cpu_caps+4-OS_BASE], eax
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pushfd
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pop eax
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mov ecx, eax
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xor eax, 0x40000
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push eax
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popfd
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pushfd
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pop eax
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xor eax, ecx
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mov [cpu_type], CPU_386
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jz .end_cpuid
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push ecx
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popfd
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mov [cpu_type], CPU_486
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mov eax, ecx
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xor eax, 0x200000
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push eax
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popfd
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pushfd
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pop eax
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xor eax, ecx
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je .end_cpuid
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mov [cpu_id], 1
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xor eax, eax
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cpuid
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mov [cpu_vendor-OS_BASE], ebx
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mov [cpu_vendor+4-OS_BASE], edx
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mov [cpu_vendor+8-OS_BASE], ecx
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cmp ebx, dword [intel_str-OS_BASE]
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jne .check_AMD
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cmp edx, dword [intel_str+4-OS_BASE]
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jne .check_AMD
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cmp ecx, dword [intel_str+8-OS_BASE]
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jne .check_AMD
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mov [cpu_Intel], 1
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cmp eax, 1
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jl .end_cpuid
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mov eax, 1
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cpuid
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mov [cpu_sign-OS_BASE], eax
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mov [cpu_info-OS_BASE], ebx
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mov [cpu_caps-OS_BASE], edx
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mov [cpu_caps+4-OS_BASE],ecx
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shr eax, 8
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and eax, 0x0f
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ret
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.end_cpuid:
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mov eax, [cpu_type]
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ret
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.check_AMD:
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cmp ebx, dword [AMD_str-OS_BASE]
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jne .unknown
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cmp edx, dword [AMD_str+4-OS_BASE]
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jne .unknown
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cmp ecx, dword [AMD_str+8-OS_BASE]
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jne .unknown
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mov [cpu_AMD], 1
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cmp eax, 1
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jl .unknown
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mov eax, 1
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cpuid
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mov [cpu_sign-OS_BASE], eax
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mov [cpu_info-OS_BASE], ebx
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mov [cpu_caps-OS_BASE], edx
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mov [cpu_caps+4-OS_BASE],ecx
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shr eax, 8
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and eax, 0x0f
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ret
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.unknown:
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mov eax, 1
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cpuid
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mov [cpu_sign-OS_BASE], eax
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mov [cpu_info-OS_BASE], ebx
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mov [cpu_caps-OS_BASE], edx
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mov [cpu_caps+4-OS_BASE],ecx
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shr eax, 8
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and eax, 0x0f
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ret
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endp
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