diff options
Diffstat (limited to 'contrib/syslinux-4.02/memdisk/bda.h')
-rw-r--r-- | contrib/syslinux-4.02/memdisk/bda.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/memdisk/bda.h b/contrib/syslinux-4.02/memdisk/bda.h new file mode 100644 index 0000000..cfac441 --- /dev/null +++ b/contrib/syslinux-4.02/memdisk/bda.h @@ -0,0 +1,56 @@ +/* ----------------------------------------------------------------------- * + * + * Copyright 2001-2009 H. Peter Anvin - All Rights Reserved + * Copyright 2009 Intel Corporation; author: H. Peter Anvin + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, Inc., 53 Temple Place Ste 330, + * Boston MA 02111-1307, USA; either version 2 of the License, or + * (at your option) any later version; incorporated herein by reference. + * + * ----------------------------------------------------------------------- */ + +#include <stdint.h> + +/* Addresses in the zero page */ +#define BIOS_INT13 (0x13*4) /* INT 13h vector */ +#define BIOS_INT15 (0x15*4) /* INT 15h vector */ +#define BIOS_INT1E (0x1E*4) /* INT 1Eh vector */ +#define BIOS_INT40 (0x40*4) /* INT 13h vector */ +#define BIOS_INT41 (0x41*4) /* INT 41h vector */ +#define BIOS_INT46 (0x46*4) /* INT 46h vector */ +#define BIOS_BASEMEM 0x413 /* Amount of DOS memory */ +#define BIOS_EQUIP 0x410 /* BIOS equipment list */ +#define BIOS_HD_COUNT 0x475 /* Number of hard drives present */ + +/* Access to objects in the zero page */ +static inline void wrz_8(uint32_t addr, uint8_t data) +{ + *((uint8_t *) addr) = data; +} + +static inline void wrz_16(uint32_t addr, uint16_t data) +{ + *((uint16_t *) addr) = data; +} + +static inline void wrz_32(uint32_t addr, uint32_t data) +{ + *((uint32_t *) addr) = data; +} + +static inline uint8_t rdz_8(uint32_t addr) +{ + return *((uint8_t *) addr); +} + +static inline uint16_t rdz_16(uint32_t addr) +{ + return *((uint16_t *) addr); +} + +static inline uint32_t rdz_32(uint32_t addr) +{ + return *((uint32_t *) addr); +} |