linux-arkmicro/linux/drivers/soc/arkmicro/memalloc.h

/*
 * Memalloc, encoder memory allocation driver (kernel module headers)
 *
 * Copyright (C) 2009  Hantro Products Oy.
 *
 * 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 2
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */


#ifndef MEMALLOC_H
#define MEMALLOC_H

#include <linux/ioctl.h>

/* Use 'k' as magic number */
#define MEMALLOC_IOC_MAGIC  'k'
/*
 * S means "Set" through a ptr,
 * T means "Tell" directly with the argument value
 * G means "Get": reply by setting through a pointer
 * Q means "Query": response is on the return value
 * X means "eXchange": G and S atomically
 * H means "sHift": T and Q atomically
 */
#define MEMALLOC_IOCXGETBUFFER         _IOWR(MEMALLOC_IOC_MAGIC, 1, MemallocParams*)
#define MEMALLOC_IOCSFREEBUFFER        _IOW(MEMALLOC_IOC_MAGIC,  2, unsigned long)

#define MEMALLOC_IOCSFLUSHRAMBUFFER    _IOW(MEMALLOC_IOC_MAGIC,  6, unsigned long)
/*
 * ... more to come
 *
 * debugging tool
 * #define MEMALLOC_IOCHARDRESET       _IO(MEMALLOC_IOC_MAGIC, 15)
 * #define MEMALLOC_IOC_MAXNR 15
 *
 */

typedef struct {
    unsigned busAddress;
    unsigned size;
} MemallocParams;

#endif /* MEMALLOC_H */