forked from KolibriOS/kolibrios
77 lines
2.2 KiB
PHP
77 lines
2.2 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2007. 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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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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; çäåñü ñîçäàþòñÿ äèñêðèïòîðû äëÿ 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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; çäåñü äîëæíà çàïîëíÿòñÿ pci_emu_dat
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.BIOS32_not_found:
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.end:
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ret
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