50 lines
1.9 KiB
C
50 lines
1.9 KiB
C
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/******************************************************************************
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* Copyright (c) 2004, 2008 IBM Corporation
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* Copyright (c) 2009 Pattrick Hueper <phueper@hueper.net>
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* All rights reserved.
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* This program and the accompanying materials
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* are made available under the terms of the BSD License
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* which accompanies this distribution, and is available at
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* http://www.opensource.org/licenses/bsd-license.php
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*
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* Contributors:
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* IBM Corporation - initial implementation
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*****************************************************************************/
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#ifndef _BIOSEMU_BIOSEMU_H_
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#define _BIOSEMU_BIOSEMU_H_
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#define MIN_REQUIRED_VMEM_SIZE 0x100000 // 1MB
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//define default segments for different components
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#define STACK_SEGMENT 0x1000 //1000:xxxx
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#define STACK_START_OFFSET 0xfffe
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#define DATA_SEGMENT 0x2000
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#define VBE_SEGMENT 0x3000
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#define PMM_CONV_SEGMENT 0x4000 // 4000:xxxx is PMM conventional memory area, extended memory area
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// will be anything beyound MIN_REQUIRED_MEMORY_SIZE
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#define PNP_DATA_SEGMENT 0x5000
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#define OPTION_ROM_CODE_SEGMENT 0xc000
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#define BIOS_DATA_SEGMENT 0xF000
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// both EBDA values are _initial_ values, they may (and will be) changed at runtime by option ROMs!!
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#define INITIAL_EBDA_SEGMENT 0xF600 // segment of the Extended BIOS Data Area
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#define INITIAL_EBDA_SIZE 0x400 // size of the EBDA (at least 1KB!! since size is stored in KB!)
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#define PMM_INT_NUM 0xFC // we misuse INT FC for PMM functionality, at the PMM Entry Point
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// Address, there will only be a call to this INT and a RETF
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#define PNP_INT_NUM 0xFD
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/* array of funtion pointers to override generic interrupt handlers
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* a YABEL caller can add functions to this array before calling YABEL
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* if a interrupt occurs, YABEL checks wether a function is set in
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* this array and only runs the generic interrupt handler code, if
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* the function pointer is NULL */
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typedef int (* yabel_handleIntFunc)(void);
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extern yabel_handleIntFunc yabel_intFuncArray[256];
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#endif
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