src/device/oprom/yabel/biosemu.h

   1 /******************************************************************************
   2  * Copyright (c) 2004, 2008 IBM Corporation
   3  * Copyright (c) 2009 Pattrick Hueper <phueper@hueper.net>
   4  *
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions are
   9  * met:
  10  *
  11  * Redistributions of source code must retain the above copyright
  12  *   notice, this list of conditions and the following disclaimer.
  13  *
  14  * Redistributions in binary form must reproduce the above copyright
  15  *   notice, this list of conditions and the following disclaimer
  16  *   in the documentation and/or other materials provided with the
  17  *   distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  23  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  *
  31  * Contributors:
  32  *     IBM Corporation - initial implementation
  33  *****************************************************************************/
  34
  35 #ifndef _BIOSEMU_BIOSEMU_H_
  36 #define _BIOSEMU_BIOSEMU_H_
  37
  38 #define MIN_REQUIRED_VMEM_SIZE 0x100000 // 1MB
  39
  40 //define default segments for different components
  41 #define STACK_SEGMENT 0x1000    //1000:xxxx
  42 #define STACK_START_OFFSET 0xfffe
  43
  44 #define DATA_SEGMENT 0x2000
  45 #define VBE_SEGMENT 0x3000
  46
  47 #define PMM_CONV_SEGMENT 0x4000 // 4000:xxxx is PMM conventional memory area, extended memory area
  48                                 // will be anything beyond MIN_REQUIRED_MEMORY_SIZE
  49 #define PNP_DATA_SEGMENT 0x5000
  50
  51 #define OPTION_ROM_CODE_SEGMENT 0xc000
  52
  53 #define BIOS_DATA_SEGMENT 0xF000
  54 // both EBDA values are _initial_ values, they may (and will be) changed at runtime by option ROMs!!
  55 #define INITIAL_EBDA_SEGMENT 0xF600     // segment of the Extended BIOS Data Area
  56 #define INITIAL_EBDA_SIZE 0x400 // size of the EBDA (at least 1KB!! since size is stored in KB!)
  57
  58 #define PMM_INT_NUM 0xFC        // we misuse INT FC for PMM functionality, at the PMM Entry Point
  59                                 // Address, there will only be a call to this INT and a RETF
  60 #define PNP_INT_NUM 0xFD
  61
  62 /* array of function pointers to override generic interrupt handlers
  63  * a YABEL caller can add functions to this array before calling YABEL
  64  * if a interrupt occurs, YABEL checks whether a function is set in
  65  * this array and only runs the generic interrupt handler code, if
  66  * the function pointer is NULL */
  67 typedef int (* yabel_handleIntFunc)(void);
  68 extern yabel_handleIntFunc yabel_intFuncArray[256];
  69 void mainboard_interrupt_handlers(int, yabel_handleIntFunc);
  70
  71 struct device;
  72
  73 u32 biosemu(u8 *biosmem, u32 biosmem_size, struct device *dev, unsigned long rom_addr);
  74 #endif