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98 lines
2.1 KiB
98 lines
2.1 KiB
;++
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;
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;Module Name:
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;
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; olidtect.c
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;
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;Abstract:
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;
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; This modules implements the machine type detection.
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;
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;Author:
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;
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;
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;
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;Environment:
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;
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; Kernel mode only.
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;
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;Revision History:
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;
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;--
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.386p
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include callconv.inc
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_TEXT SEGMENT DWORD PUBLIC 'CODE'
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ASSUME DS:FLAT, ES:FLAT, SS:NOTHING, FS:NOTHING, GS:NOTHING
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;++
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; BOOLEAN
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; DetectOlivettiMp (
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; OUT PBOOLEAN IsConfiguredMp
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; );
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;
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; Routine Description:
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; Determines the type of system (specifically for eisa machines), by reading
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; the system board ID.
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;
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; Arguments:
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; IsConfiguredMp - If LSX5030/40/40E is detected, then this value is
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; set to TRUE if more than one CPU is found, else FALSE.
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; The effect is that on returning FALSE, the standard HAL
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; is used, whilst on returning TRUE, the LSX5030 HAL is used.
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;
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; Return Value:
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; TRUE (non-zero in eax): LSX5030/40/40E detected
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; FALSE (zero in eax): non-LSX5030 detected
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;
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;--
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cPublicProc _DetectOlivettiMp,1
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; 3 byte value is read from 0c80-0c82
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mov edx, 0c80h
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in al, dx
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cmp al, 3dh ; Manufacturer Code - 1st byte
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jne NotAnLSX5030
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inc edx
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in al, dx
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cmp al, 89h ; Manufacturer Code - 2nd byte
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jne NotAnLSX5030
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inc edx
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in al, dx
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cmp al, 03h ; Product Number part 1
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jne NotAnLSX5030
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;inc edx
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;in al, dx
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;and al, 0f8h ; 5-bit Product Number part 2
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;cmp al, 10h
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;jne NotAnLSX5030
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;
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; Detect Processor Type reading Product Number part 2
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; Mask out Id's different from Cxh and Dxh
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;
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mov edx, 0c8bh
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in al, dx
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and al, 0e0h
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cmp al, 0c0h
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je AnLSX5030
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NotAnLSX5030:
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mov eax, 0
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stdRET _DetectOlivettiMp
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AnLSX5030:
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mov edx, dword ptr [esp+4] ; get the address of IsConfiguredMp
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mov byte ptr [edx], 1 ; *IsConfiguredMp = TRUE
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mov eax, 1
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stdRET _DetectOlivettiMp
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stdENDP _DetectOlivettiMp
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_TEXT ENDS
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