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