src/lib/dl/himemsys.h

   1 /* himemsys.h
   2  *
   3  * Support calls to use HIMEM.SYS
   4  * (C) 2009-2012 Jonathan Campbell.
   5  * Hackipedia DOS library.
   6  *
   7  * This code is licensed under the LGPL.
   8  * <insert LGPL legal text here>
   9  */
  10
  11 #ifndef __HW_DOS_XMM_H
  12 #define __HW_DOS_XMM_H
  13
  14 #if !defined(TARGET_WINDOWS) && !defined(TARGET_OS2)
  15
  16 #include <stdlib.h>
  17 #include <string.h>
  18 #include <stdint.h>
  19 #include <assert.h>
  20 #include <stdio.h>
  21 #include <conio.h>
  22 #include <dos.h>
  23
  24 //#include "src/lib/doslib/cpu.h"
  25 #include "src/lib/doslib/dos.h"
  26
  27 /* HMA memory is present */
  28 #define HIMEM_F_HMA             (1 << 0)
  29 /* HIMEM.SYS supports extended functions to address up to 4GB of RAM (surpassing the older API's 64MB limit) */
  30 #define HIMEM_F_4GB             (1 << 1)
  31
  32 extern unsigned char himem_sys_present;
  33 extern unsigned int himem_sys_version;
  34 extern unsigned long himem_sys_entry;
  35 extern unsigned char himem_sys_flags;
  36 extern unsigned long himem_sys_total_free;
  37 extern unsigned long himem_sys_largest_free;
  38
  39 #pragma pack(push,1)
  40 struct himem_block_info {
  41         uint32_t                block_length_kb;
  42         unsigned char           lock_count;
  43         unsigned char           free_handles;
  44 };
  45 #pragma pack(pop)
  46
  47 int probe_himem_sys();
  48 int himem_sys_query_a20();
  49 int himem_sys_local_a20(int enable);
  50 int himem_sys_global_a20(int enable);
  51 void himem_sys_update_free_memory_status();
  52 int __cdecl himem_sys_alloc(unsigned long size/* in KB---not bytes*/);
  53 int himem_sys_move(unsigned int dst_handle,uint32_t dst_offset,unsigned int src_handle,uint32_t src_offset,uint32_t length);
  54 int __cdecl himem_sys_realloc(unsigned int handle,unsigned long size/* in KB---not bytes*/);
  55 int himem_sys_get_handle_info(unsigned int handle,struct himem_block_info *b);
  56 uint32_t himem_sys_lock(unsigned int handle);
  57 int himem_sys_unlock(unsigned int handle);
  58 int himem_sys_free(int handle);
  59
  60 #endif /* !defined(TARGET_WINDOWS) && !defined(TARGET_OS2) */
  61
  62 #endif /* __HW_DOS_EMM_H */