memdisk/bda.h

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 2001-2009 H. Peter Anvin - All Rights Reserved
   4  *   Copyright 2009 Intel Corporation; author: H. Peter Anvin
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
   9  *   Boston MA 02111-1307, USA; either version 2 of the License, or
  10  *   (at your option) any later version; incorporated herein by reference.
  11  *
  12  * ----------------------------------------------------------------------- */
  13
  14 #include <stdint.h>
  15
  16 /* Addresses in the zero page */
  17 #define BIOS_INT13      (0x13*4)        /* INT 13h vector */
  18 #define BIOS_INT15      (0x15*4)        /* INT 15h vector */
  19 #define BIOS_INT1E      (0x1E*4)        /* INT 1Eh vector */
  20 #define BIOS_INT40      (0x40*4)        /* INT 13h vector */
  21 #define BIOS_INT41      (0x41*4)        /* INT 41h vector */
  22 #define BIOS_INT46      (0x46*4)        /* INT 46h vector */
  23 #define BIOS_BASEMEM    0x413           /* Amount of DOS memory */
  24 #define BIOS_EQUIP      0x410           /* BIOS equipment list */
  25 #define BIOS_HD_COUNT   0x475           /* Number of hard drives present */
  26
  27 /* Access to objects in the zero page */
  28 static inline void wrz_8(uint32_t addr, uint8_t data)
  29 {
  30     *((uint8_t *) addr) = data;
  31 }
  32
  33 static inline void wrz_16(uint32_t addr, uint16_t data)
  34 {
  35     *((uint16_t *) addr) = data;
  36 }
  37
  38 static inline void wrz_32(uint32_t addr, uint32_t data)
  39 {
  40     *((uint32_t *) addr) = data;
  41 }
  42
  43 static inline uint8_t rdz_8(uint32_t addr)
  44 {
  45     return *((uint8_t *) addr);
  46 }
  47
  48 static inline uint16_t rdz_16(uint32_t addr)
  49 {
  50     return *((uint16_t *) addr);
  51 }
  52
  53 static inline uint32_t rdz_32(uint32_t addr)
  54 {
  55     return *((uint32_t *) addr);
  56 }