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/*
* CHU - driver for CH375 in disk mode
* Copyright (C) 2024 Javier S. Pedro
*
* 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, either version 3 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef UTILS_H
#define UTILS_H
#include <stdint.h>
static inline __segment get_cs(void);
#pragma aux get_cs = "mov ax, cs" value [ax] modify exact [] nomemory
static inline __segment get_ds(void);
#pragma aux get_ds = "mov ax, ds" value [ax] modify exact [] nomemory
static void load_ds_from_cs(void);
#pragma aux load_ds_from_cs = \
"push cs" \
"pop ds" \
__modify __exact []
#define SWAPNC_32(w) (\
(((w) & 0x000000FFUL) << 24) |\
(((w) & 0x0000FF00UL) << 8) |\
(((w) & 0x00FF0000UL) >> 8) |\
(((w) & 0xFF000000UL) >> 24)\
)
static inline uint16_t div(uint32_t dividend, uint16_t divisor);
#pragma aux div = \
"div bx" \
__parm [dx ax] [bx] \
__value [ax] \
__modify __exact [dx ax]
static inline uint32_t mul(uint16_t a, uint16_t b);
#pragma aux mul = \
"mul dx" \
__parm [ax] [dx] \
__value [dx ax] \
__modify __exact [dx ax]
#endif // UTILS_H
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