1 /******************************************************************************
2 * Copyright (c) 2004, 2008 IBM Corporation
4 * This program and the accompanying materials
5 * are made available under the terms of the BSD License
6 * which accompanies this distribution, and is available at
7 * http://www.opensource.org/licenses/bsd-license.php
10 * IBM Corporation - initial implementation
11 *****************************************************************************/
13 #ifndef _BIOSEMU_BIOSEMU_H_
14 #define _BIOSEMU_BIOSEMU_H_
16 #define MIN_REQUIRED_VMEM_SIZE 0x100000 // 1MB
18 //define default segments for different components
19 #define STACK_SEGMENT 0x1000 //1000:xxxx
20 #define STACK_START_OFFSET 0xfffe
22 #define DATA_SEGMENT 0x2000
23 #define VBE_SEGMENT 0x3000
25 #define PMM_CONV_SEGMENT 0x4000 // 4000:xxxx is PMM conventional memory area, extended memory area
26 // will be anything beyound MIN_REQUIRED_MEMORY_SIZE
27 #define PNP_DATA_SEGMENT 0x5000
29 #define OPTION_ROM_CODE_SEGMENT 0xc000
31 #define BIOS_DATA_SEGMENT 0xF000
32 // both EBDA values are _initial_ values, they may (and will be) changed at runtime by option ROMs!!
33 #define INITIAL_EBDA_SEGMENT 0xF600 // segment of the Extended BIOS Data Area
34 #define INITIAL_EBDA_SIZE 0x400 // size of the EBDA (at least 1KB!! since size is stored in KB!)
36 #define PMM_INT_NUM 0xFC // we misuse INT FC for PMM functionality, at the PMM Entry Point
37 // Address, there will only be a call to this INT and a RETF
38 #define PNP_INT_NUM 0xFD
40 uint32_t biosemu(char argc, char **argv);